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  • 101
    Publikationsdatum: 2000-06-02
    Beschreibung: The mechanism by which a signal recognition particle (SRP) and its receptor mediate protein targeting to the endoplasmic reticulum or to the bacterial plasma membrane is evolutionarily conserved. In Escherichia coli, this reaction is mediated by the Ffh/4.5S RNA ribonucleoprotein complex (Ffh/4.5S RNP; the SRP) and the FtsY protein (the SRP receptor). We have quantified the effects of 4.5S RNA on Ffh-FtsY complex formation by monitoring changes in tryptophan fluorescence. Surprisingly, 4.5S RNA facilitates both assembly and disassembly of the Ffh-FtsY complex to a similar extent. These results provide an example of an RNA molecule facilitating protein-protein interactions in a catalytic fashion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peluso, P -- Herschlag, D -- Nock, S -- Freymann, D M -- Johnson, A E -- Walter, P -- GM 26494/GM/NIGMS NIH HHS/ -- GM 32384/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Jun 2;288(5471):1640-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94143, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10834842" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Bacterial Proteins/chemistry/*metabolism ; Catalysis ; Escherichia coli/metabolism ; *Escherichia coli Proteins ; Guanosine Diphosphate/metabolism ; Guanosine Triphosphate/metabolism ; Guanylyl Imidodiphosphate/metabolism ; Kinetics ; Models, Chemical ; Nucleic Acid Conformation ; Protein Binding ; Protein Conformation ; Protein Structure, Tertiary ; RNA, Bacterial/chemistry/*metabolism ; Receptors, Cytoplasmic and Nuclear/chemistry/*metabolism ; Ribonucleoproteins/chemistry/metabolism ; Signal Recognition Particle/chemistry/*metabolism ; Spectrometry, Fluorescence ; Thermodynamics ; Tryptophan
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 102
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-03-18
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2000 Feb 25;287(5457):1418-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10722390" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adult ; Animal Experimentation ; Animals ; Bioethics ; *Biomedical Research ; Bone Marrow Cells/cytology/physiology ; Cell Differentiation ; Cell Separation ; Cell Transplantation ; Cells, Cultured ; Child ; *Embryo Research ; Embryo, Mammalian/*cytology ; Federal Government ; Humans ; Mice ; Middle Aged ; Stem Cells/*cytology/physiology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 103
    Publikationsdatum: 2000-04-28
    Beschreibung: The potential of cloning depends in part on whether the procedure can reverse cellular aging and restore somatic cells to a phenotypically youthful state. Here, we report the birth of six healthy cloned calves derived from populations of senescent donor somatic cells. Nuclear transfer extended the replicative life-span of senescent cells (zero to four population doublings remaining) to greater than 90 population doublings. Early population doubling level complementary DNA-1 (EPC-1, an age-dependent gene) expression in cells from the cloned animals was 3.5- to 5-fold higher than that in cells from age-matched (5 to 10 months old) controls. Southern blot and flow cytometric analyses indicated that the telomeres were also extended beyond those of newborn (〈2 weeks old) and age-matched control animals. The ability to regenerate animals and cells may have important implications for medicine and the study of mammalian aging.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lanza, R P -- Cibelli, J B -- Blackwell, C -- Cristofalo, V J -- Francis, M K -- Baerlocher, G M -- Mak, J -- Schertzer, M -- Chavez, E A -- Sawyer, N -- Lansdorp, P M -- West, M D -- AG00378/AG/NIA NIH HHS/ -- AI29524/AI/NIAID NIH HHS/ -- GM56162/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Apr 28;288(5466):665-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Advanced Cell Technology, One Innovation Drive, Worcester, MA 01605, USA. rlanza@advancedcell.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10784448" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blotting, Southern ; Cattle/*genetics ; *Cell Aging ; Cell Division ; Cells, Cultured ; Clone Cells ; *Cloning, Organism ; DNA, Complementary ; Embryo Transfer ; *Eye Proteins ; Female ; Fibroblasts ; Flow Cytometry ; In Situ Hybridization, Fluorescence ; Longevity ; Matched-Pair Analysis ; *Nerve Growth Factors ; *Nuclear Transfer Techniques ; Proteins/genetics ; RNA, Messenger/genetics/metabolism ; Serpins/genetics ; Telomere/*ultrastructure
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 104
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-08-12
    Beschreibung: Researchers are increasingly coming to view violence as the end result of multiple risk factors that may include a biological vulnerability that can be brought out or reinforced by social environment. Longitudinal studies are demonstrating that children who become chronically violent adults generally are difficult from early childhood. But just which early risk factors are most powerful, and how they interact, is proving very tough to sort out.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 2000 Jul 28;289(5479):580-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10939972" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adolescent ; *Aggression/psychology ; Behavior Therapy ; Central Nervous System/physiology ; Child ; Child, Preschool ; Female ; Genes ; Humans ; Juvenile Delinquency ; Longitudinal Studies ; Male ; Parenting ; Personality Disorders/psychology ; Psychotropic Drugs/therapeutic use ; Risk Factors ; *Social Environment ; *Violence/psychology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 105
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-05-08
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Williamson, T L -- Corson, L B -- Huang, L -- Burlingame, A -- Liu, J -- Bruijn, L I -- Cleveland, D W -- New York, N.Y. -- Science. 2000 Apr 21;288(5465):399.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ludwig Institute for Cancer Research, University of California at San Diego, La Jolla, CA 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10798964" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amyotrophic Lateral Sclerosis/*enzymology/genetics/pathology ; Animals ; Apoptosis ; Cells, Cultured ; Copper/metabolism ; Humans ; Mice ; Motor Neurons/metabolism/*pathology ; Mutation ; Neurofilament Proteins/metabolism ; Nitrates/metabolism ; Superoxide Dismutase/*genetics/*metabolism ; Yeasts/cytology/metabolism ; Zinc/*metabolism/toxicity
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 106
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-03-24
    Beschreibung: Sensory axons become functional late in development when Schwann cells (SC) stop proliferating and differentiate into distinct phenotypes. We report that impulse activity in premyelinated axons can inhibit proliferation and differentiation of SCs. This neuron-glial signaling is mediated by adenosine triphosphate acting through P2 receptors on SCs and intracellular signaling pathways involving Ca2+, Ca2+/calmodulin kinase, mitogen-activated protein kinase, cyclic adenosine 3',5'-monophosphate response element binding protein, and expression of c-fos and Krox-24. Adenosine triphosphate arrests maturation of SCs in an immature morphological stage and prevents expression of O4, myelin basic protein, and the formation of myelin. Through this mechanism, functional activity in the developing nervous system could delay terminal differentiation of SCs until exposure to appropriate axon-derived signals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stevens, B -- Fields, R D -- New York, N.Y. -- Science. 2000 Mar 24;287(5461):2267-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Developmental Neurobiology, National Institutes of Health, National Institute of Child Health and Human Development, Building 49, Room 5A38, 49 Convent Drive, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10731149" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Action Potentials ; Adenosine Triphosphate/metabolism ; Animals ; Axons/*physiology ; Calcium/metabolism ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; Cell Differentiation ; Cell Division ; Cells, Cultured ; Coculture Techniques ; Cyclic AMP Response Element-Binding Protein/metabolism ; DNA-Binding Proteins/genetics/metabolism ; Early Growth Response Protein 1 ; Electric Stimulation ; Ganglia, Spinal/physiology ; Gene Expression Regulation, Developmental ; Genes, fos ; *Immediate-Early Proteins ; Mice ; Microscopy, Confocal ; Myelin Sheath/metabolism ; Neurons, Afferent/*physiology ; Phosphorylation ; Proto-Oncogene Proteins c-fos/metabolism ; Receptors, Purinergic P2/metabolism ; Schwann Cells/*cytology/*physiology ; Signal Transduction ; Transcription Factors/genetics/metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 107
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-02-24
    Beschreibung: Exactly how signaling proteins know where they need to be in the cell is one of the intriguing mysteries of signal transduction biology. In a Perspective, Pouyssegur reviews new results that identify b-arrestin 2 as a scaffolding protein that holds together the different components of a MAPK signaling pathway that activates the transcription factor kinase, JNK3.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pouyssegur, J -- New York, N.Y. -- Science. 2000 Nov 24;290(5496):1515-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Signaling, Developmental Biology and Cancer Research, CNRS-UMR 6543, Nice 06189, France. pouysseg@unice.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11185509" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Arrestins/*metabolism ; Cell Nucleus/metabolism ; Cells, Cultured ; Cytosol/metabolism ; Endosomes/metabolism ; Enzyme Activation ; JNK Mitogen-Activated Protein Kinases ; MAP Kinase Kinase 7 ; MAP Kinase Kinase Kinase 5 ; MAP Kinase Kinase Kinases/metabolism ; *MAP Kinase Signaling System ; Mitogen-Activated Protein Kinase 1/metabolism ; Mitogen-Activated Protein Kinase 10 ; Mitogen-Activated Protein Kinase Kinases/metabolism ; Mitogen-Activated Protein Kinases/*metabolism ; Models, Biological ; Protein-Tyrosine Kinases/*metabolism ; Proto-Oncogene Proteins c-jun/metabolism ; Receptor, Angiotensin, Type 1 ; Receptor, PAR-2 ; Receptors, Angiotensin/metabolism ; Receptors, Thrombin/metabolism
    Print ISSN: 0036-8075
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 108
    Publikationsdatum: 2000-08-19
    Beschreibung: To gain a molecular understanding of tumor angiogenesis, we compared gene expression patterns of endothelial cells derived from blood vessels of normal and malignant colorectal tissues. Of over 170 transcripts predominantly expressed in the endothelium, 79 were differentially expressed, including 46 that were specifically elevated in tumor-associated endothelium. Several of these genes encode extracellular matrix proteins, but most are of unknown function. Most of these tumor endothelial markers were expressed in a wide range of tumor types, as well as in normal vessels associated with wound healing and corpus luteum formation. These studies demonstrate that tumor and normal endothelium are distinct at the molecular level, a finding that may have significant implications for the development of anti-angiogenic therapies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉St Croix, B -- Rago, C -- Velculescu, V -- Traverso, G -- Romans, K E -- Montgomery, E -- Lal, A -- Riggins, G J -- Lengauer, C -- Vogelstein, B -- Kinzler, K W -- CA57345/CA/NCI NIH HHS/ -- CA62924/CA/NCI NIH HHS/ -- CGAP S98-146A/PHS HHS/ -- New York, N.Y. -- Science. 2000 Aug 18;289(5482):1197-202.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Johns Hopkins Oncology Center, Howard Hughes Medical Institute, Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10947988" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Biomarkers, Tumor ; Cell Separation ; Cells, Cultured ; Colon/*blood supply/metabolism ; Colorectal Neoplasms/*blood supply/genetics/metabolism/pathology ; Corpus Luteum/blood supply/metabolism ; Endothelium, Vascular/cytology/*metabolism/pathology ; Extracellular Matrix Proteins/genetics ; Female ; Gene Expression ; *Gene Expression Profiling ; Humans ; Intestinal Mucosa/blood supply/cytology/pathology ; Neoplasms/blood supply/genetics/metabolism ; Neovascularization, Pathologic/*genetics ; Neovascularization, Physiologic/genetics ; RNA, Messenger/genetics/metabolism ; Rectum/*blood supply/metabolism ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 109
    Publikationsdatum: 2000-01-22
    Beschreibung: Complement is a component of natural immunity. Its regulation is needed to protect tissues from inflammation, but mice with a disrupted gene for the complement regulator decay accelerating factor were normal. Mice that were deficient in another murine complement regulator, Crry, were generated to investigate its role in vivo. Survival of Crry-/- embryos was compromised because of complement deposition and concomitant placenta inflammation. Complement activation at the fetomaternal interface caused the fetal loss because breeding to C3-/- mice rescued Crry-/- mice from lethality. Thus, the regulation of complement is critical in fetal control of maternal processes that mediate tissue damage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xu, C -- Mao, D -- Holers, V M -- Palanca, B -- Cheng, A M -- Molina, H -- R01 AI40576-01/AI/NIAID NIH HHS/ -- R01 AI44912-01/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2000 Jan 21;287(5452):498-501.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10642554" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Complement Activation ; Complement C3/analysis/immunology ; Embryo, Mammalian/*immunology/metabolism ; *Embryonic and Fetal Development ; Female ; Gene Targeting ; *Immune Tolerance ; Mice ; Neutrophil Infiltration ; Pregnancy ; Receptors, Complement/genetics/*physiology ; Trophoblasts/immunology/metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 110
    Publikationsdatum: 2000-04-15
    Beschreibung: The capsaicin (vanilloid) receptor VR1 is a cation channel expressed by primary sensory neurons of the "pain" pathway. Heterologously expressed VR1 can be activated by vanilloid compounds, protons, or heat (〉43 degrees C), but whether this channel contributes to chemical or thermal sensitivity in vivo is not known. Here, we demonstrate that sensory neurons from mice lacking VR1 are severely deficient in their responses to each of these noxious stimuli. VR1-/- mice showed normal responses to noxious mechanical stimuli but exhibited no vanilloid-evoked pain behavior, were impaired in the detection of painful heat, and showed little thermal hypersensitivity in the setting of inflammation. Thus, VR1 is essential for selective modalities of pain sensation and for tissue injury-induced thermal hyperalgesia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Caterina, M J -- Leffler, A -- Malmberg, A B -- Martin, W J -- Trafton, J -- Petersen-Zeitz, K R -- Koltzenburg, M -- Basbaum, A I -- Julius, D -- NS07265/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2000 Apr 14;288(5464):306-13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA 94143-0450, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10764638" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Body Temperature/drug effects ; Calcium/metabolism ; Capsaicin/metabolism/*pharmacology ; Cells, Cultured ; Diterpenes/pharmacology ; Ganglia, Spinal/cytology ; Gene Targeting ; Hot Temperature ; Hydrogen-Ion Concentration ; Inflammation/physiopathology ; Mice ; Mice, Knockout ; Nerve Fibers/physiology ; Neurons/physiology ; Neurons, Afferent/*physiology ; Nociceptors/*physiology ; Pain/*physiopathology ; Pain Threshold ; Receptors, Drug/*physiology ; Spinal Cord/cytology/physiology ; TRPV Cation Channels
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 111
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-02-05
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 2000 Jan 14;287(5451):202-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10660414" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Aborted Fetus ; *Abortion, Induced ; Academic Medical Centers ; Cells, Cultured ; Ethical Review ; Ethics Committees, Research ; *Fetal Research ; *Fetus/cytology ; Humans ; Nebraska ; *Neurosciences ; Politics ; *Research
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 112
    Publikationsdatum: 2000-07-21
    Beschreibung: Inbred strains of mice are largely used to identify the genetic basis of normal and pathological behaviors. This report demonstrates that a moderate period of food shortage, an ecologically common experience, can reverse or abolish strain differences in behavioral responses to the abused psychostimulant amphetamine. The period of food shortage occurred when the animals were mature and was terminated before the administration of amphetamine. Strain differences in behavior appear highly dependent on environmental experiences. Consequently, to identify biological determinants of behavior, an integrated approach considering the interaction between environmental and genetic factors needs to be used.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cabib, S -- Orsini, C -- Le Moal, M -- Piazza, P V -- New York, N.Y. -- Science. 2000 Jul 21;289(5478):463-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dipartimento di Psicologia, Universita "La Sapienza" via dei Marsi 78, Roma I-00185, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10903209" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amphetamine/*pharmacology ; Animals ; Behavior, Animal/*drug effects ; Central Nervous System Stimulants/*pharmacology ; Conditioning (Psychology)/drug effects ; *Food Deprivation ; Genes ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Inbred DBA ; Motor Activity/drug effects ; Phenotype ; Species Specificity ; Substance-Related Disorders/*etiology ; Weight Loss
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 113
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-09-08
    Beschreibung: During animal development, cells become progressively more restricted in the cell types to which they can give rise. In the central nervous system (CNS), for example, multipotential stem cells produce various kinds of specified precursors that divide a limited number of times before they terminally differentiate into either neurons or glial cells. We show here that certain extracellular signals can induce oligodendrocyte precursor cells to revert to multipotential neural stem cells, which can self-renew and give rise to neurons and astrocytes, as well as to oligodendrocytes. Thus, these precursor cells have greater developmental potential than previously thought.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kondo, T -- Raff, M -- New York, N.Y. -- Science. 2000 Sep 8;289(5485):1754-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Research Council Developmental Neurobiology Programme, MRC Laboratory for Molecular Cell Biology and the Biology Department, University College London, London WC1E 6BT, UK. t.kondo@ucl.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10976069" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Animals, Newborn ; Astrocytes/chemistry/*cytology ; Blood ; Bone Morphogenetic Proteins/pharmacology ; Cell Culture Techniques ; *Cell Differentiation ; Cells, Cultured ; Culture Media ; Culture Media, Serum-Free ; Fibroblast Growth Factor 2/pharmacology ; Galactosylceramides/analysis ; Glial Fibrillary Acidic Protein/analysis ; Glutamate Decarboxylase/biosynthesis/genetics ; Isoenzymes/biosynthesis/genetics ; Neurofilament Proteins/analysis/biosynthesis ; Neurons/chemistry/*cytology ; Oligodendroglia/chemistry/*cytology ; Optic Nerve/cytology ; Platelet-Derived Growth Factor/pharmacology ; Rats ; Stem Cells/chemistry/*cytology ; Thyroid Hormones/pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 114
    Publikationsdatum: 2000-09-29
    Beschreibung: A20 is a cytoplasmic zinc finger protein that inhibits nuclear factor kappaB (NF-kappaB) activity and tumor necrosis factor (TNF)-mediated programmed cell death (PCD). TNF dramatically increases A20 messenger RNA expression in all tissues. Mice deficient for A20 develop severe inflammation and cachexia, are hypersensitive to both lipopolysaccharide and TNF, and die prematurely. A20-deficient cells fail to terminate TNF-induced NF-kappaB responses. These cells are also more susceptible than control cells to undergo TNF-mediated PCD. Thus, A20 is critical for limiting inflammation by terminating TNF-induced NF-kappaB responses in vivo.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3582399/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3582399/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, E G -- Boone, D L -- Chai, S -- Libby, S L -- Chien, M -- Lodolce, J P -- Ma, A -- 5T32GM07183/GM/NIGMS NIH HHS/ -- R01 DK052751/DK/NIDDK NIH HHS/ -- T32GM07839/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Sep 29;289(5488):2350-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, The University of Chicago, 5841 South Maryland Avenue, MC 6084, Chicago, IL 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11009421" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Apoptosis ; Cachexia/pathology/physiopathology ; Cells, Cultured ; Cysteine Endopeptidases ; DNA/metabolism ; DNA-Binding Proteins/genetics/metabolism ; Fibroblasts/metabolism ; Gene Targeting ; *I-kappa B Proteins ; Inflammation/pathology/*physiopathology ; Interleukin-1/pharmacology ; Intestines/pathology ; Intracellular Signaling Peptides and Proteins ; Kidney/pathology ; Lipopolysaccharides/immunology ; Liver/pathology ; Mice ; NF-kappa B/*metabolism ; Nuclear Proteins ; Phosphorylation ; Proteins/genetics/*physiology ; Skin/pathology ; T-Lymphocytes/cytology/metabolism ; Tumor Necrosis Factor-alpha/*pharmacology ; Zinc Fingers
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 115
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-02-26
    Beschreibung: Many protein enzymes use general acid-base catalysis as a way to increase reaction rates. The amino acid histidine is optimized for this function because it has a pK(a) (where K(a) is the acid dissociation constant) near physiological pH. The RNA enzyme (ribozyme) from hepatitis delta virus catalyzes self-cleavage of a phosphodiester bond. Reactivity-pH profiles in monovalent or divalent cations, as well as distance to the leaving-group oxygen, implicate cytosine 75 (C75) of the ribozyme as the general acid and ribozyme-bound hydrated metal hydroxide as the general base in the self-cleavage reaction. Moreover, C75 has a pK(a) perturbed to neutrality, making it "histidine-like." Anticooperative interaction is observed between protonated C75 and a metal ion, which serves to modulate the pK(a) of C75. General acid-base catalysis expands the catalytic repertoire of RNA and may provide improved rate acceleration.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nakano, S -- Chadalavada, D M -- Bevilacqua, P C -- GM58709/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Feb 25;287(5457):1493-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Pennsylvania State University, University Park, PA 16802, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10688799" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Base Pairing ; Binding Sites ; Calcium/metabolism ; Catalysis ; Cobalt/metabolism ; Crystallography, X-Ray ; Hepatitis Delta Virus/*chemistry/enzymology ; Hydrogen Bonding ; Hydrogen-Ion Concentration ; Kinetics ; Magnesium/metabolism ; Metals/metabolism ; Models, Chemical ; Models, Molecular ; Nucleic Acid Conformation ; Protons ; RNA, Catalytic/chemistry/*metabolism ; RNA, Viral/chemistry/metabolism ; Static Electricity ; Thermodynamics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 116
    Publikationsdatum: 2000-05-08
    Beschreibung: To determine why proteasome inhibitors prevent thymocyte death, we examined whether proteasomes degrade anti-apoptotic molecules in cells induced to undergo apoptosis. The c-IAP1 and XIAP inhibitors of apoptosis were selectively lost in glucocorticoid- or etoposide-treated thymocytes in a proteasome-dependent manner before death. IAPs catalyzed their own ubiquitination in vitro, an activity requiring the RING domain. Overexpressed wild-type c-IAP1, but not a RING domain mutant, was spontaneously ubiquitinated and degraded, and stably expressed XIAP lacking the RING domain was relatively resistant to apoptosis-induced degradation and, correspondingly, more effective at preventing apoptosis than wild-type XIAP. Autoubiquitination and degradation of IAPs may be a key event in the apoptotic program.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, Y -- Fang, S -- Jensen, J P -- Weissman, A M -- Ashwell, J D -- New York, N.Y. -- Science. 2000 May 5;288(5467):874-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Immune Cell Biology, Division of Basic Sciences, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10797013" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Apoptosis ; Cells, Cultured ; Cysteine Endopeptidases/*metabolism ; Dexamethasone/pharmacology ; Etoposide/pharmacology ; Hybridomas ; Inhibitor of Apoptosis Proteins ; Ligases/*metabolism ; Mice ; Mice, Inbred C57BL ; Multienzyme Complexes/*metabolism ; Proteasome Endopeptidase Complex ; Protein Structure, Tertiary ; Proteins/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; T-Lymphocytes/cytology/drug effects/*metabolism ; Thymus Gland/cytology ; Transfection ; Ubiquitin-Protein Ligases ; Ubiquitins/metabolism ; X-Linked Inhibitor of Apoptosis Protein
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 117
    Publikationsdatum: 2000-03-31
    Beschreibung: Brucella abortus, a mammalian pathogen, and Rhizobium meliloti, a phylogenetically related plant symbiont, establish chronic infections in their respective hosts. Here a highly conserved B. abortus homolog of the R. meliloti bacA gene, which encodes a putative cytoplasmic membrane transport protein required for symbiosis, was identified. An isogenic B. abortus bacA mutant exhibited decreased survival in macrophages and greatly accelerated clearance from experimentally infected mice compared to the virulent parental strain. Thus, the bacA gene product is critical for the maintenance of two very diverse host-bacterial relationships.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉LeVier, K -- Phillips, R W -- Grippe, V K -- Roop, R M 2nd -- Walker, G C -- GM31030/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2492-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10741969" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antibodies, Bacterial/immunology ; Bacterial Proteins/genetics/*physiology ; Brucella abortus/genetics/*pathogenicity/physiology ; Brucellosis/immunology/*microbiology ; Cells, Cultured ; Female ; Hypersensitivity, Delayed ; Liver/microbiology ; Macrophages/immunology/*microbiology ; Medicago sativa/microbiology ; Membrane Proteins/genetics/*physiology ; *Membrane Transport Proteins ; Mice ; Mice, Inbred BALB C ; Molecular Sequence Data ; Mutagenesis, Insertional ; Sinorhizobium meliloti/genetics/*physiology ; Spleen/microbiology ; Symbiosis ; Virulence
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 118
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-08-12
    Beschreibung: In work reported on page 452, researchers have found a way to coax certain introns, bits of genetic debris that litter the DNA and interrupt the coding sequences of many genes, to hop into the exact sequences where the researchers want them. The method could enhance all sorts of genetic manipulations, from studying basic gene function to combating viral infections to delivering genes for gene therapy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Strauss, E -- New York, N.Y. -- Science. 2000 Jul 21;289(5478):374.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10939940" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Cells, Cultured ; DNA/*genetics/metabolism ; *Gene Targeting ; *Gene Transfer Techniques ; Genes, Viral ; Genetic Engineering ; Genetic Therapy ; HIV/genetics ; Humans ; *Introns ; Receptors, CCR5/genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 119
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-02-26
    Beschreibung: The debate on the use of human embryos for research will be one of the more important issues of the 21st century. Unlike recombinant DNA technology, embryonic stem cell research most probably will result in the destruction of living embryos. Many people consider this research immoral, illegal, and unnecessary. Therefore, it is imperative to proceed cautiously. Federal funding of research using human embryos or pluripotent cells derived from them would be inappropriate until further resolution of the ethical issues has been achieved.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Young, F E -- New York, N.Y. -- Science. 2000 Feb 25;287(5457):1424.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Reformed Theological Seminary, Fourth Presbyterian Church, 5500 River Road, Bethesda, MD 20816-3399, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10688779" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Bioethics ; Biomedical Research ; Cells, Cultured ; *Embryo Research ; Embryo, Mammalian/*cytology ; Government Regulation ; Guidelines as Topic ; Humans ; National Institutes of Health (U.S.) ; Public Policy ; *Research Support as Topic ; Risk Assessment ; *Stem Cells ; United States ; Value of Life
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 120
    Publikationsdatum: 2000-06-24
    Beschreibung: T helper 1 (TH1) cells mediate cellular immunity, whereas TH2 cells potentiate antiparasite and humoral immunity. We used a complementary DNA subtraction method, representational display analysis, to show that the small guanosine triphosphatase Rac2 is expressed selectively in murine TH1 cells. Rac induces the interferon-gamma (IFN-gamma) promoter through cooperative activation of the nuclear factor kappa B and p38 mitogen-activated protein kinase pathways. Tetracycline-regulated transgenic mice expressing constitutively active Rac2 in T cells exhibited enhanced IFN-gamma production. Dominant-negative Rac inhibited IFN-gamma production in murine T cells. Moreover, T cells from Rac2-/- mice showed decreased IFN-gamma production under TH1 conditions in vitro. Thus, Rac2 activates TH1-specific signaling and IFN-gamma gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, B -- Yu, H -- Zheng, W -- Voll, R -- Na, S -- Roberts, A W -- Williams, D A -- Davis, R J -- Ghosh, S -- Flavell, R A -- New York, N.Y. -- Science. 2000 Jun 23;288(5474):2219-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Immunobiology and Howard Hughes Medical Institute, Yale University School of Medicine, 310 Cedar Street, New Haven, CT 06520-8011, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10864872" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Differentiation ; Cells, Cultured ; Cytokines/biosynthesis/genetics ; Gene Expression Regulation ; Humans ; Interferon-gamma/biosynthesis/*genetics ; JNK Mitogen-Activated Protein Kinases ; Jurkat Cells ; Lymphocyte Activation ; Mice ; Mice, Transgenic ; Mitogen-Activated Protein Kinases/metabolism ; NF-kappa B/metabolism ; Promoter Regions, Genetic ; Signal Transduction ; Th1 Cells/cytology/*immunology/*metabolism ; Transfection ; p38 Mitogen-Activated Protein Kinases ; rac GTP-Binding Proteins/genetics/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 121
    Publikationsdatum: 2000-06-02
    Beschreibung: The differentiation potential of stem cells in tissues of the adult has been thought to be limited to cell lineages present in the organ from which they were derived, but there is evidence that some stem cells may have a broader differentiation repertoire. We show here that neural stem cells from the adult mouse brain can contribute to the formation of chimeric chick and mouse embryos and give rise to cells of all germ layers. This demonstrates that an adult neural stem cell has a very broad developmental capacity and may potentially be used to generate a variety of cell types for transplantation in different diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clarke, D L -- Johansson, C B -- Wilbertz, J -- Veress, B -- Nilsson, E -- Karlstrom, H -- Lendahl, U -- Frisen, J -- New York, N.Y. -- Science. 2000 Jun 2;288(5471):1660-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell and Molecular Biology, Medical Nobel Institute, Stockholm, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10834848" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blastocyst/cytology/physiology ; Brain/*cytology ; Cell Aggregation ; *Cell Differentiation ; Cell Lineage ; Cells, Cultured ; Chick Embryo ; Coculture Techniques ; Ectoderm/cytology ; Embryonic and Fetal Development ; Endoderm/cytology ; Liver/cytology/embryology ; Mesoderm/cytology ; Mice ; Microinjections ; Morula/cytology/physiology ; Muscles/cytology/embryology ; Stem Cell Transplantation ; Stem Cells/*cytology/physiology ; Transplantation Chimera
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 122
    Publikationsdatum: 2000-07-07
    Beschreibung: Hypertension and pregnancy-related hypertension are major public health problems of largely unknown causes. We describe a mutation in the mineralocorticoid receptor (MR), S810L, that causes early-onset hypertension that is markedly exacerbated in pregnancy. This mutation results in constitutive MR activity and alters receptor specificity, with progesterone and other steroids lacking 21-hydroxyl groups, normally MR antagonists, becoming potent agonists. Structural and biochemical studies indicate that the mutation results in the gain of a van der Waals interaction between helix 5 and helix 3 that substitutes for interaction of the steroid 21-hydroxyl group with helix 3 in the wild-type receptor. This helix 5-helix 3 interaction is highly conserved among diverse nuclear hormone receptors, suggesting its general role in receptor activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Geller, D S -- Farhi, A -- Pinkerton, N -- Fradley, M -- Moritz, M -- Spitzer, A -- Meinke, G -- Tsai, F T -- Sigler, P B -- Lifton, R P -- New York, N.Y. -- Science. 2000 Jul 7;289(5476):119-23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Genetics, Yale University School of Medicine, Boyer Center for Molecular Medicine, Room 154, 295 Congress Avenue, New Haven, CT 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10884226" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adolescent ; Aldosterone/*metabolism ; Amino Acid Sequence ; Amino Acid Substitution ; Base Sequence ; Binding, Competitive ; Dimerization ; Female ; Heterozygote ; Humans ; Hypertension/etiology/*genetics/metabolism ; Male ; Models, Molecular ; Molecular Sequence Data ; Pedigree ; Point Mutation ; Pregnancy ; *Pregnancy Complications, Cardiovascular/etiology/metabolism ; Progesterone/*metabolism ; Protein Conformation ; Protein Structure, Secondary ; Receptors, Mineralocorticoid/chemistry/*genetics/*metabolism ; Receptors, Steroid/chemistry/metabolism ; Steroids/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 123
    Publikationsdatum: 2000-07-06
    Beschreibung: Definition of cellular responses to cytokines often involves cross-communication through their respective receptors. Here, signaling by interferon-gamma (IFN-gamma) is shown to depend on the IFN-alpha/beta receptor components. Although these IFNs transmit signals through distinct receptor complexes, the IFN-alpha/beta receptor component, IFNAR1, facilitates efficient assembly of IFN-gamma-activated transcription factors. This cross talk is contingent on a constitutive subthreshold IFN-alpha/beta signaling and the association between the two nonligand-binding receptor components, IFNAR1 and IFNGR2, in the caveolar membrane domains. This aspect of signaling cross talk by IFNs may apply to other cytokines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Takaoka, A -- Mitani, Y -- Suemori, H -- Sato, M -- Yokochi, T -- Noguchi, S -- Tanaka, N -- Taniguchi, T -- New York, N.Y. -- Science. 2000 Jun 30;288(5475):2357-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, Graduate School of Medicine and Faculty of Medicine, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10875919" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Membrane/*metabolism ; Cells, Cultured ; Cytopathogenic Effect, Viral ; DNA-Binding Proteins/metabolism ; Dimerization ; Encephalomyocarditis virus/drug effects/physiology ; Interferon Type I/*metabolism ; Interferon-alpha/genetics/metabolism/pharmacology ; Interferon-beta/genetics/metabolism/pharmacology ; Interferon-gamma/*metabolism/pharmacology ; Janus Kinase 1 ; Janus Kinase 2 ; Membrane Proteins ; Mice ; Phosphorylation ; Phosphotyrosine/metabolism ; Protein-Tyrosine Kinases/metabolism ; *Proto-Oncogene Proteins ; *Receptor Cross-Talk ; Receptor, Interferon alpha-beta ; Receptors, Interferon/genetics/*metabolism ; Recombinant Proteins ; STAT1 Transcription Factor ; *Signal Transduction ; Trans-Activators/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 124
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-07-15
    Beschreibung: At the Chris Hani Baragwanath Hospital here, where HIV infects more than 20% of the 17,000 pregnant women who give birth here each year, pediatrician Glenda Gray and obstetrician James McIntyre aggressively try to help HIV-infected pregnant women stop the virus from infecting their babies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 2000 Jun 23;288(5474):2163.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10896602" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Anti-HIV Agents/therapeutic use ; Female ; HIV Infections/diagnosis/drug therapy/prevention & control/*transmission ; History, 20th Century ; Humans ; *Infectious Disease Transmission, Vertical ; Pregnancy ; Pregnancy Complications, Infectious/diagnosis/*drug therapy ; South Africa
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 125
    Publikationsdatum: 2000-10-06
    Beschreibung: Rearrangements involving the RET gene are common in radiation-associated papillary thyroid cancer (PTC). The RET/PTC1 type of rearrangement is an inversion of chromosome 10 mediated by illegitimate recombination between the RET and the H4 genes, which are 30 megabases apart. Here we ask whether despite the great linear distance between them, RET and H4 recombination might be promoted by their proximity in the nucleus. We used two-color fluorescence in situ hybridization and three-dimensional microscopy to map the positions of the RET and H4 loci within interphase nuclei. At least one pair of RET and H4 was juxtaposed in 35% of normal human thyroid cells and in 21% of peripheral blood lymphocytes, but only in 6% of normal mammary epithelial cells. Spatial contiguity of RET and H4 may provide a structural basis for generation of RET/PTC1 rearrangement by allowing a single radiation track to produce a double-strand break in each gene at the same site in the nucleus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nikiforova, M N -- Stringer, J R -- Blough, R -- Medvedovic, M -- Fagin, J A -- Nikiforov, Y E -- CA 72597/CA/NCI NIH HHS/ -- P01 ES 05652-10/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 2000 Oct 6;290(5489):138-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11021799" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adult ; Breast/cytology ; Cells, Cultured ; Chromosome Inversion ; Chromosomes, Human, Pair 10/*genetics ; Cytoskeletal Proteins ; *Drosophila Proteins ; Epithelial Cells ; Gene Rearrangement ; Humans ; In Situ Hybridization, Fluorescence ; Interphase ; Lymphocytes ; Neoplasms, Radiation-Induced/genetics ; Oncogene Proteins, Fusion/*genetics ; Protein-Tyrosine Kinases ; Proteins/*genetics ; Proto-Oncogene Proteins/*genetics ; Proto-Oncogene Proteins c-ret ; Receptor Protein-Tyrosine Kinases/*genetics ; *Recombination, Genetic ; Reverse Transcriptase Polymerase Chain Reaction ; Thyroid Gland/*cytology/*radiation effects ; Thyroid Neoplasms/genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 126
    Publikationsdatum: 2000-10-06
    Beschreibung: Genes that control the early stages of adipogenesis remain largely unknown. Here, we show that murine GATA-2 and GATA-3 are specifically expressed in white adipocyte precursors and that their down-regulation sets the stage for terminal differentiation. Constitutive GATA-2 and GATA-3 expression suppressed adipocyte differentiation and trapped cells at the preadipocyte stage. This effect is mediated, at least in part, through the direct suppression of peroxisome proliferator-activated receptor gamma. GATA-3-deficient embryonic stem cells exhibit an enhanced capacity to differentiate into adipocytes, and defective GATA-2 and GATA-3 expression is associated with obesity. Thus, GATA-2 and GATA-3 regulate adipocyte differentiation through molecular control of the preadipocyte-adipocyte transition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tong, Q -- Dalgin, G -- Xu, H -- Ting, C N -- Leiden, J M -- Hotamisligil, G S -- DK56894/DK/NIDDK NIH HHS/ -- F32DK09940/DK/NIDDK NIH HHS/ -- R37AI29673/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2000 Oct 6;290(5489):134-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biological Sciences and Department of Nutrition, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11021798" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): 3T3 Cells ; Adipocytes/*cytology/*metabolism ; Adipose Tissue/cytology/metabolism ; Adipose Tissue, Brown/cytology/metabolism ; Animals ; Cell Differentiation ; Cells, Cultured ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; GATA2 Transcription Factor ; GATA3 Transcription Factor ; Gene Expression ; Mice ; Mutation ; Obesity/genetics/metabolism ; Promoter Regions, Genetic ; Receptors, Cytoplasmic and Nuclear/genetics/metabolism ; Stem Cells/cytology ; Trans-Activators/chemistry/genetics/*metabolism ; Transcription Factors/chemistry/genetics/*metabolism ; Transcription, Genetic ; Zinc Fingers
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 127
    Publikationsdatum: 2000-03-17
    Beschreibung: The mature mammalian retina is thought to lack regenerative capacity. Here, we report the identification of a stem cell in the adult mouse eye, which represents a possible substrate for retinal regeneration. Single pigmented ciliary margin cells clonally proliferate in vitro to form sphere colonies of cells that can differentiate into retinal-specific cell types, including rod photoreceptors, bipolar neurons, and Muller glia. Adult retinal stem cells are localized to the pigmented ciliary margin and not to the central and peripheral retinal pigmented epithelium, indicating that these cells may be homologous to those found in the eye germinal zone of other nonmammalian vertebrates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tropepe, V -- Coles, B L -- Chiasson, B J -- Horsford, D J -- Elia, A J -- McInnes, R R -- van der Kooy, D -- New York, N.Y. -- Science. 2000 Mar 17;287(5460):2032-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy and Cell Biology, University of Toronto, Medical Sciences Building 1105, 1 King's College Circle, Toronto, Ontario M5S 1A8, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10720333" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Count ; Cell Differentiation ; Cell Division ; Cell Lineage ; Cell Size ; Cell Survival ; Cells, Cultured ; Clone Cells ; Colony-Forming Units Assay ; Fibroblast Growth Factor 2/pharmacology ; Homeodomain Proteins/biosynthesis ; Intermediate Filament Proteins/biosynthesis ; Mice ; *Nerve Tissue Proteins ; Nestin ; Neuroglia/cytology/metabolism ; Neurons/cytology/metabolism ; Pigment Epithelium of Eye/cytology/embryology ; Retina/*cytology/embryology/metabolism ; Retinal Rod Photoreceptor Cells/cytology/metabolism ; Stem Cells/*cytology/metabolism ; Transcription Factors/biosynthesis
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 128
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-07-06
    Beschreibung: Until now, neurobiologists have had little luck in finding the matchmakers of nerve cell connections, called synapses, in the brain. In today's issue of Cell, researchers report that a single protein can apparently trigger synapse formation between brain neurons isolated from mice and grown in culture. If the finding is borne out in living animals, it could provide fresh insights into how the brain is wired during embryonic development and might eventually provide new ways to enhance or at least maintain synapse formation in the brains of patients suffering from neurodegenerative diseases such as Parkinson's or Alzheimer's.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gura, T -- New York, N.Y. -- Science. 2000 Jun 9;288(5472):1718-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10877681" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Brain/cytology ; Cell Adhesion Molecules, Neuronal ; Cells, Cultured ; Membrane Proteins/analysis/genetics/*metabolism ; Mice ; Mice, Knockout ; Nerve Tissue Proteins/analysis/genetics/*metabolism ; Neurons/*physiology ; Synapses/*physiology ; Synaptic Membranes/chemistry
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  • 129
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-05-16
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gura, T -- New York, N.Y. -- Science. 2000 May 5;288(5467):786-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10809641" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antineoplastic Agents/*pharmacology ; *Apoptosis ; Apoptosis Regulatory Proteins ; Cell Death ; Cells, Cultured ; Clinical Trials as Topic ; Culture Techniques ; Drug Screening Assays, Antitumor ; Humans ; Liver/cytology/*drug effects ; Liver Diseases/pathology ; Membrane Glycoproteins/*pharmacology ; Neoplasms/*drug therapy/pathology ; TNF-Related Apoptosis-Inducing Ligand ; Tumor Necrosis Factor-alpha/*pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 130
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-03-18
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 2000 Feb 25;287(5457):1421-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10722392" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Aborted Fetus ; Animals ; Bioethics ; Biomedical Research ; Brain Diseases ; Brain Tissue Transplantation ; Cell Death ; Cell Differentiation ; Cells, Cultured ; Dopamine/biosynthesis ; Embryo, Mammalian/*cytology ; *Fetal Research ; *Fetal Tissue Transplantation ; Humans ; Neuroglia/cytology ; Neurons/*cytology/metabolism/*transplantation ; Parkinson Disease/*therapy ; *Stem Cell Transplantation ; Stem Cells/cytology ; Substantia Nigra/cytology/embryology ; Therapeutic Human Experimentation
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 131
    Publikationsdatum: 2000-05-12
    Beschreibung: A critical function of tumor suppressor p53 is the induction of apoptosis in cells exposed to noxious stresses. We report a previously unidentified pro-apoptotic gene, Noxa. Expression of Noxa induction in primary mouse cells exposed to x-ray irradiation was dependent on p53. Noxa encodes a Bcl-2 homology 3 (BH3)-only member of the Bcl-2 family of proteins; this member contains the BH3 region but not other BH domains. When ectopically expressed, Noxa underwent BH3 motif-dependent localization to mitochondria and interacted with anti-apoptotic Bcl-2 family members, resulting in the activation of caspase-9. We also demonstrate that blocking the endogenous Noxa induction results in the suppression of apoptosis. Noxa may thus represent a mediator of p53-dependent apoptosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oda, E -- Ohki, R -- Murasawa, H -- Nemoto, J -- Shibue, T -- Yamashita, T -- Tokino, T -- Taniguchi, T -- Tanaka, N -- New York, N.Y. -- Science. 2000 May 12;288(5468):1053-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, Graduate School of Medicine and Faculty of Medicine, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10807576" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Motifs ; Amino Acid Sequence ; Amino Acid Substitution ; Animals ; *Apoptosis ; Caspase 9 ; Caspases/metabolism ; Cell Line ; Cells, Cultured ; DNA Damage ; Enzyme Activation ; Gene Expression Profiling ; Gene Expression Regulation ; Humans ; Mice ; Mitochondria/metabolism ; Molecular Sequence Data ; Promoter Regions, Genetic ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-bcl-2/chemistry/*physiology/*secretion ; RNA, Messenger/genetics/metabolism ; T-Lymphocytes/metabolism ; Tumor Suppressor Protein p53/*physiology ; bcl-2-Associated X Protein
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  • 132
    Publikationsdatum: 2000-01-29
    Beschreibung: Malfolded proteins in the endoplasmic reticulum (ER) induce cellular stress and activate c-Jun amino-terminal kinases (JNKs or SAPKs). Mammalian homologs of yeast IRE1, which activate chaperone genes in response to ER stress, also activated JNK, and IRE1alpha-/- fibroblasts were impaired in JNK activation by ER stress. The cytoplasmic part of IRE1 bound TRAF2, an adaptor protein that couples plasma membrane receptors to JNK activation. Dominant-negative TRAF2 inhibited activation of JNK by IRE1. Activation of JNK by endogenous signals initiated in the ER proceeds by a pathway similar to that initiated by cell surface receptors in response to extracellular signals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Urano, F -- Wang, X -- Bertolotti, A -- Zhang, Y -- Chung, P -- Harding, H P -- Ron, D -- DK47119/DK/NIDDK NIH HHS/ -- ES08681/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 2000 Jan 28;287(5453):664-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Skirball Institute of Biomolecular Medicine, Departments of Medicine, Cell Biology and the Kaplan Cancer Center, New York University Medical School, New York, NY 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10650002" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Line ; Cells, Cultured ; Endoplasmic Reticulum/*metabolism ; Endoribonucleases/genetics/*metabolism ; Enzyme Activation ; Gene Targeting ; Humans ; JNK Mitogen-Activated Protein Kinases ; *Membrane Proteins ; Mitogen-Activated Protein Kinases/*metabolism ; Multienzyme Complexes/genetics/*metabolism ; Protein Kinases/genetics/*metabolism ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Proteins/chemistry/genetics/*metabolism ; Rats ; Recombinant Fusion Proteins/metabolism ; TNF Receptor-Associated Factor 2 ; Thapsigargin/pharmacology ; Two-Hybrid System Techniques ; eIF-2 Kinase/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 133
    Publikationsdatum: 2000-03-31
    Beschreibung: Using an optical-trap/flow-control video microscopy technique, we followed transcription by single molecules of Escherichia coli RNA polymerase in real time over long template distances. These studies reveal that RNA polymerase molecules possess different intrinsic transcription rates and different propensities to pause and stop. The data also show that reversible pausing is a kinetic intermediate between normal elongation and the arrested state. The conformational metastability of RNA polymerase revealed by this single-molecule study of transcription has direct implications for the mechanisms of gene regulation in both bacteria and eukaryotes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davenport, R J -- Wuite, G J -- Landick, R -- Bustamante, C -- GM-32543/GM/NIGMS NIH HHS/ -- GM-38660/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2497-500.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10741971" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): DNA, Bacterial/genetics/*metabolism ; DNA-Directed RNA Polymerases/*metabolism ; Escherichia coli/enzymology/*genetics ; Kinetics ; Microscopy, Video ; Models, Genetic ; Optics and Photonics ; RNA, Bacterial/genetics ; RNA, Messenger/*genetics ; Templates, Genetic ; *Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 134
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-02-12
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hagmann, M -- New York, N.Y. -- Science. 2000 Jan 21;287(5452):408.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10671158" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Complement Activation ; Complement System Proteins/*immunology ; Embryo, Mammalian/*immunology ; Female ; Humans ; *Immune Tolerance ; Immunity, Innate ; Mice ; Mice, Knockout ; Pregnancy ; Receptors, Complement/genetics/*physiology ; Trophoblasts/immunology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 135
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-05-12
    Beschreibung: Influenza B virus is a human pathogen whose origin and possible reservoir in nature are not known. An influenza B virus was isolated from a naturally infected harbor seal (Phoca vitulina) and was found to be infectious to seal kidney cells in vitro. Sequence analyses and serology indicated that influenza virus B/Seal/Netherlands/1/99 is closely related to strains that circulated in humans 4 to 5 years earlier. Retrospective analyses of sera collected from 971 seals showed a prevalence of antibodies to influenza B virus in 2% of the animals after 1995 and in none before 1995. This animal reservoir, harboring influenza B viruses that have circulated in the past, may pose a direct threat to humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Osterhaus, A D -- Rimmelzwaan, G F -- Martina, B E -- Bestebroer, T M -- Fouchier, R A -- HD 15527/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2000 May 12;288(5468):1051-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Influenza Center, Department of Virology, Erasmus University, Doctor Molewaterplein 50, 3015 GE Rotterdam, Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10807575" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antibodies, Viral/blood ; Cell Line ; Cells, Cultured ; Disease Reservoirs ; Dogs ; Enzyme-Linked Immunosorbent Assay ; Genes, Viral ; Hemagglutination Inhibition Tests ; Hemagglutinin Glycoproteins, Influenza Virus/genetics ; Humans ; Influenza B virus/classification/genetics/immunology/*isolation & purification ; Neutralization Tests ; Orthomyxoviridae Infections/epidemiology/*veterinary/virology ; Pharynx/virology ; Reverse Transcriptase Polymerase Chain Reaction ; Seals, Earless/*virology ; Viral Nonstructural Proteins/genetics ; Virus Shedding
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 136
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-08-26
    Beschreibung: Contact-mediated axon repulsion by ephrins raises an unresolved question: these cell surface ligands form a high-affinity multivalent complex with their receptors present on axons, yet rather than being bound, axons can be rapidly repelled. We show here that ephrin-A2 forms a stable complex with the metalloprotease Kuzbanian, involving interactions outside the cleavage region and the protease domain. Eph receptor binding triggered ephrin-A2 cleavage in a localized reaction specific to the cognate ligand. A cleavage-inhibiting mutation in ephrin-A2 delayed axon withdrawal. These studies reveal mechanisms for protease recognition and control of cell surface proteins, and, for ephrin-A2, they may provide a means for efficient axon detachment and termination of signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hattori, M -- Osterfield, M -- Flanagan, J G -- EY11559/EY/NEI NIH HHS/ -- HD29417/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2000 Aug 25;289(5483):1360-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology and Program in Neuroscience, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10958785" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Axons/*physiology ; Cell Adhesion ; Cell Communication ; Cell Membrane/metabolism ; Cells, Cultured ; Disintegrins/genetics/*metabolism ; *Drosophila Proteins ; Ephrin-A2 ; Gene Expression ; Glycosylphosphatidylinositols/metabolism ; Growth Cones/physiology ; Humans ; Ligands ; Metalloendopeptidases/genetics/*metabolism ; Mice ; Molecular Sequence Data ; Mutation ; Nervous System/embryology/enzymology ; Receptor Protein-Tyrosine Kinases/metabolism ; Receptor, EphA3 ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Transcription Factors/chemistry/genetics/*metabolism ; Tumor Cells, Cultured
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  • 137
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-09-23
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2000 Sep 8;289(5485):1666.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11001723" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Animals, Newborn ; Blood ; Cell Culture Techniques ; *Cell Differentiation ; Cells, Cultured ; Culture Media ; Fibroblast Growth Factors/pharmacology ; Neurons/*cytology ; Oligodendroglia/*cytology ; Rats ; Stem Cells/*cytology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 138
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-03-14
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Will, C L -- Luhrmann, R -- New York, N.Y. -- Science. 2001 Mar 9;291(5510):1916-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cellular Biochemistry Department, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Gottingen, Germany. cwill1@gwdg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11245200" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acid Anhydride Hydrolases/*metabolism ; Adenosine Triphosphatases/metabolism ; Adenosine Triphosphate/metabolism ; DEAD-box RNA Helicases ; Fungal Proteins/metabolism ; Kinetics ; Nucleoside-Triphosphatase ; RNA Nucleotidyltransferases/metabolism ; RNA Precursors/metabolism ; RNA, Double-Stranded/*metabolism ; RNA, Small Nuclear/*metabolism ; *RNA-Binding Proteins ; Ribonucleoprotein, U1 Small Nuclear/*metabolism ; Ribonucleoproteins/metabolism ; Ribonucleoproteins, Small Nuclear/*metabolism ; Saccharomyces cerevisiae/genetics/metabolism ; *Saccharomyces cerevisiae Proteins ; Spliceosomes/*metabolism ; Vaccinia virus/genetics/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 139
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-06-17
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2000 Jun 2;288(5471):1559-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10858126" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blood Cells/cytology ; Brain/*cytology ; Cell Aggregation ; *Cell Differentiation ; Cells, Cultured ; Chick Embryo ; Embryo, Mammalian ; Mice ; Organ Specificity ; Stem Cell Transplantation ; Stem Cells/*cytology/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 140
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-03-10
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGuffin, P -- Riley, B -- Plomin, R -- New York, N.Y. -- Science. 2001 Feb 16;291(5507):1232-49.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Social, Genetic and Developmental Psychiatry Research Centre, Institute of Psychiatry, Kings College London, De Crespigny Park, London SE5 8AF, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11233447" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Behavior ; Genes ; *Genetics, Behavioral ; Genome, Human ; *Genomics ; Human Genome Project ; Humans ; Mental Disorders/*genetics ; Polymorphism, Single Nucleotide ; *Quantitative Trait, Heritable
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 141
    Publikationsdatum: 2001-08-04
    Beschreibung: Many hematopoietic cells undergo apoptosis when deprived of specific cytokines, and this process requires de novo RNA/protein synthesis. Using DNA microarrays to analyze interleukin-3 (IL-3)-dependent murine FL5.12 pro-B cells, we found that the gene undergoing maximal transcriptional induction after cytokine withdrawal is 24p3, which encodes a secreted lipocalin. Conditioned medium from IL-3-deprived FL5.12 cells contained 24p3 and induced apoptosis in naive FL5.12 cells even when IL-3 was present. 24p3 also induced apoptosis in a wide variety of leukocytes but not other cell types. Apoptotic sensitivity correlated with the presence of a putative 24p3 cell surface receptor. We conclude that IL-3 deprivation activates 24p3 transcription, leading to synthesis and secretion of 24p3, which induces apoptosis through an autocrine pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Devireddy, L R -- Teodoro, J G -- Richard, F A -- Green, M R -- New York, N.Y. -- Science. 2001 Aug 3;293(5531):829-34.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Program in Gene Function and Expression and Program in Molecular Medicine, University of Massachusetts Medical School, 373 Plantation Street, Worcester, MA 01605, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11486081" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acute-Phase Proteins/*genetics/*metabolism ; Animals ; *Apoptosis/drug effects ; Autocrine Communication ; Carrier Proteins/metabolism ; Cell Line ; Cells, Cultured ; Culture Media, Conditioned ; Dexamethasone/pharmacology ; *Gene Expression Regulation ; Humans ; Insulin-Like Growth Factor I/pharmacology ; Interleukin-3/*metabolism ; Interleukins/metabolism ; Leukocytes/cytology/*physiology ; Lipocalins ; Mice ; Oligonucleotide Array Sequence Analysis ; Oncogene Proteins/*genetics/*metabolism ; Phosphorylation ; Proto-Oncogene Proteins ; Proto-Oncogene Proteins c-bcl-2/metabolism ; Receptors, Cell Surface/metabolism ; Recombinant Fusion Proteins/metabolism ; Transcription, Genetic ; Tumor Cells, Cultured ; bcl-Associated Death Protein ; bcl-X Protein
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 142
    Publikationsdatum: 2001-11-17
    Beschreibung: Dendritic cells (DCs) are important in regulating both immunity and tolerance. Hence, we hypothesized that systemic lupus erythematosus (SLE), an autoimmune disease characterized by autoreactive B and T cells, may be caused by alterations in the functions of DCs. Consistent with this, monocytes from SLE patients' blood were found to function as antigen-presenting cells, in vitro. Furthermore, serum from SLE patients induced normal monocytes to differentiate into DCs. These DCs could capture antigens from dying cells and present them to CD4-positive T cells. The capacity of SLE patients' serum to induce DC differentiation correlated with disease activity and depended on the actions of interferon-alpha (IFN-alpha). Thus, unabated induction of DCs by IFN-alpha may drive the autoimmune response in SLE.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Blanco, P -- Palucka, A K -- Gill, M -- Pascual, V -- Banchereau, J -- R01 AR46589/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Nov 16;294(5546):1540-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Baylor Institute for Immunology Research, Dallas, TX 75204, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11711679" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adolescent ; Antigen Presentation ; Antigens, CD/analysis ; Blood Cell Count ; CD4-Positive T-Lymphocytes/immunology ; Cell Differentiation ; Cells, Cultured ; Child ; Dendritic Cells/*cytology/*immunology ; Homeostasis ; Humans ; Interferon-alpha/blood/pharmacology/*physiology ; Lupus Erythematosus, Systemic/blood/*immunology ; Lymphocyte Culture Test, Mixed ; Monocytes/cytology/*immunology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 143
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-11-10
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2001 Nov 9;294(5545):1271-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11701910" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Animals, Zoo/anatomy & histology/physiology ; Conservation of Natural Resources ; Cryopreservation ; *Elephants/anatomy & histology/physiology ; Female ; Genitalia, Female/*ultrasonography ; Insemination, Artificial/*veterinary ; Male ; Pregnancy ; Semen Preservation ; Ultrasonography/*veterinary
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 144
    Publikationsdatum: 2001-06-09
    Beschreibung: How cytokines control differentiation of helper T (TH) cells is controversial. We show that T-bet, without apparent assistance from interleukin 12 (IL-12)/STAT4, specifies TH1 effector fate by targeting chromatin remodeling to individual interferon-gamma (IFN-gamma) alleles and by inducing IL-12 receptor beta2 expression. Subsequently, it appears that IL-12/STAT4 serves two essential functions in the development of TH1 cells: as growth signal, inducing survival and cell division; and as trans-activator, prolonging IFN-gamma synthesis through a genetic interaction with the coactivator, CREB-binding protein. These results suggest that a cytokine does not simply induce TH fate choice but instead may act as an essential secondary stimulus that mediates selective survival of a lineage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mullen, A C -- High, F A -- Hutchins, A S -- Lee, H W -- Villarino, A V -- Livingston, D M -- Kung, A L -- Cereb, N -- Yao, T P -- Yang, S Y -- Reiner, S L -- AI-42370/AI/NIAID NIH HHS/ -- EY-07131/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2001 Jun 8;292(5523):1907-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Abramson Family Cancer Research Institute and Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104-6160, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11397944" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alleles ; Animals ; CREB-Binding Protein ; Cell Differentiation ; Cell Division ; Cell Lineage ; Cells, Cultured ; DNA-Binding Proteins/metabolism ; Gene Expression Regulation ; Histones/metabolism ; Interferon-gamma/*biosynthesis/genetics ; Interleukin-12/*metabolism ; Lymphocyte Activation ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Nuclear Proteins/metabolism ; RNA, Messenger/genetics/metabolism ; Receptors, Interleukin/metabolism ; Receptors, Interleukin-12 ; STAT4 Transcription Factor ; Signal Transduction ; T-Box Domain Proteins ; Th1 Cells/cytology/*immunology/metabolism ; Trans-Activators/metabolism ; Transcription Factors/genetics/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 145
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-03-10
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murray, A W -- New York, N.Y. -- Science. 2001 Feb 23;291(5508):1499-502.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA. amurray@mcb.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11234079" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Biological Evolution ; Cell Cycle ; *Cell Division ; Cell Line ; Cells, Cultured ; Centrioles/*physiology ; Centrosome/*physiology ; Chromosome Segregation ; DNA Replication ; Microtubules/physiology ; Mitosis ; Proteins/physiology ; Saccharomycetales/cytology/physiology ; Spindle Apparatus/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 146
    Publikationsdatum: 2001-03-07
    Beschreibung: EDG-1 is a heterotrimeric guanine nucleotide binding protein-coupled receptor (GPCR) for sphingosine-1-phosphate (SPP). Cell migration toward platelet-derived growth factor (PDGF), which stimulates sphingosine kinase and increases intracellular SPP, was dependent on expression of EDG-1. Deletion of edg-1 or inhibition of sphingosine kinase suppressed chemotaxis toward PDGF and also activation of the small guanosine triphosphatase Rac, which is essential for protrusion of lamellipodia and forward movement. Moreover, PDGF activated EDG-1, as measured by translocation of beta-arrestin and phosphorylation of EDG-1. Our results reveal a role for receptor cross-communication in which activation of a GPCR by a receptor tyrosine kinase is critical for cell motility.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hobson, J P -- Rosenfeldt, H M -- Barak, L S -- Olivera, A -- Poulton, S -- Caron, M G -- Milstien, S -- Spiegel, S -- CA61774/CA/NCI NIH HHS/ -- GM43880/GM/NIGMS NIH HHS/ -- HL-61365/HL/NHLBI NIH HHS/ -- NS19576/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2001 Mar 2;291(5509):1800-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, Georgetown University Medical Center, Washington, DC 20007, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11230698" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Arrestins/metabolism ; Cell Line ; Cell Membrane/metabolism ; Cells, Cultured ; *Chemotaxis/drug effects ; Gene Deletion ; Humans ; Immediate-Early Proteins/genetics/*metabolism ; *Lysophospholipids ; Mice ; Muscle, Smooth, Vascular/cytology/metabolism ; Phosphorylation ; Phosphotransferases (Alcohol Group Acceptor)/antagonists & inhibitors/metabolism ; Platelet-Derived Growth Factor/metabolism/*pharmacology ; Proto-Oncogene Proteins c-sis ; Receptor Cross-Talk ; *Receptors, Cell Surface ; *Receptors, G-Protein-Coupled ; Receptors, Lysophospholipid ; Receptors, Platelet-Derived Growth Factor/metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Sphingosine/*analogs & derivatives/*metabolism/pharmacology ; Transfection
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 147
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-03-10
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 2001 Feb 16;291(5507):1218.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11233443" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Chromosomes, Human ; Computational Biology ; Genes ; Genetic Variation ; Genetics, Medical ; *Genome, Human ; Genomics ; *Human Genome Project ; Humans ; *Sequence Analysis, DNA/methods
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 148
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-06-26
    Beschreibung: The temporal pattern and relative timing of action potentials among neocortical neurons may carry important information. However, how cortical circuits detect or generate coherent activity remains unclear. Using paired recordings in rat neocortical slices, we found that the firing of fast-spiking cells can reflect the spiking pattern of single-axon pyramidal inputs. Moreover, this property allowed groups of fast-spiking cells interconnected by electrical and gamma-aminobutyric acid (GABA)-releasing (GABAergic) synapses to detect the relative timing of their excitatory inputs. These results indicate that networks of fast-spiking cells may play a role in the detection and promotion of synchronous activity within the neocortex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Galarreta, M -- Hestrin, S -- EY09120/EY/NEI NIH HHS/ -- EY12114/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2001 Jun 22;292(5525):2295-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Comparative Medicine, Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA 94305, USA. galarreta@stanford.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11423653" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Action Potentials ; Animals ; Axons/physiology ; Excitatory Postsynaptic Potentials ; Female ; In Vitro Techniques ; Interneurons/*physiology ; Kinetics ; Male ; Neocortex/cytology/*physiology ; Nerve Net/*physiology ; Pyramidal Cells/*physiology ; Rats ; Rats, Sprague-Dawley ; Synapses/physiology ; *Synaptic Transmission ; Time Factors ; gamma-Aminobutyric Acid/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 149
    Publikationsdatum: 2001-03-27
    Beschreibung: Expanded polyglutamine repeats have been proposed to cause neuronal degeneration in Huntington's disease (HD) and related disorders, through abnormal interactions with other proteins containing short polyglutamine tracts such as the transcriptional coactivator CREB binding protein, CBP. We found that CBP was depleted from its normal nuclear location and was present in polyglutamine aggregates in HD cell culture models, HD transgenic mice, and human HD postmortem brain. Expanded polyglutamine repeats specifically interfere with CBP-activated gene transcription, and overexpression of CBP rescued polyglutamine-induced neuronal toxicity. Thus, polyglutamine-mediated interference with CBP-regulated gene transcription may constitute a genetic gain of function, underlying the pathogenesis of polyglutamine disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nucifora , F C Jr -- Sasaki, M -- Peters, M F -- Huang, H -- Cooper, J K -- Yamada, M -- Takahashi, H -- Tsuji, S -- Troncoso, J -- Dawson, V L -- Dawson, T M -- Ross, C A -- NS16375/NS/NINDS NIH HHS/ -- NS34172/NS/NINDS NIH HHS/ -- NS37090/NS/NINDS NIH HHS/ -- NS38144/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2001 Mar 23;291(5512):2423-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neurobiology, Department of Psychiatry, The Johns Hopkins University School of Medicine, Baltimore, MD 21205-2196, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11264541" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Brain/metabolism ; CREB-Binding Protein ; Cell Nucleus/metabolism ; Cell Survival ; Cells, Cultured ; Humans ; Huntington Disease/genetics/*metabolism ; Mice ; Mice, Transgenic ; Mutation ; Nerve Tissue Proteins/chemistry/genetics/*metabolism ; Neurons/cytology/*metabolism ; Nuclear Proteins/chemistry/genetics/*metabolism ; Peptides/chemistry/*metabolism ; Repetitive Sequences, Amino Acid ; Trans-Activators/chemistry/*metabolism ; *Transcription, Genetic ; Transfection ; Tumor Cells, Cultured
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 150
    Publikationsdatum: 2001-03-10
    Beschreibung: Axonal growth cones that cross the nervous system midline change their responsiveness to midline guidance cues: They become repelled by the repellent Slit and simultaneously lose responsiveness to the attractant netrin. These mutually reinforcing changes help to expel growth cones from the midline by making a once-attractive environment appear repulsive. Here, we provide evidence that these two changes are causally linked: In the growth cones of embryonic Xenopus spinal axons, activation of the Slit receptor Roundabout (Robo) silences the attractive effect of netrin-1, but not its growth-stimulatory effect, through direct binding of the cytoplasmic domain of Robo to that of the netrin receptor DCC. Biologically, this hierarchical silencing mechanism helps to prevent a tug-of-war between attractive and repulsive signals in the growth cone that might cause confusion. Molecularly, silencing is enabled by a modular and interlocking design of the cytoplasmic domains of these potentially antagonistic receptors that predetermines the outcome of their simultaneous activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stein, E -- Tessier-Lavigne, M -- New York, N.Y. -- Science. 2001 Mar 9;291(5510):1928-38. Epub 2001 Feb 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy and Department of Biochemistry and Biophysics, Howard Hughes Medical Institute, University of California, San Francisco, CA 94143, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11239147" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Axons/*physiology ; Cell Adhesion Molecules/chemistry/genetics/*metabolism ; Cell Movement ; Cells, Cultured ; Cytoplasm/chemistry ; Embryo, Nonmammalian/cytology ; Growth Cones/*physiology ; Hepatocyte Growth Factor/metabolism/pharmacology ; Intercellular Signaling Peptides and Proteins ; Ligands ; Mutation ; Nerve Growth Factors/metabolism/pharmacology/*physiology ; Nerve Tissue Proteins/metabolism/pharmacology/*physiology ; Precipitin Tests ; Protein Structure, Tertiary ; Receptors, Cell Surface/chemistry/genetics/*metabolism ; Receptors, Immunologic/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Transfection ; *Tumor Suppressor Proteins ; Xenopus/embryology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 151
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-03-10
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Galas, D J -- New York, N.Y. -- Science. 2001 Feb 16;291(5507):1257-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Keck Graduate Institute of Applied Life Sciences, Claremont, CA 91711, USA. David_Galas@kgi.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11233451" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Algorithms ; Animals ; Automation ; Chromosomes, Artificial, Bacterial ; *Computational Biology ; Contig Mapping ; Genes ; Genetic Techniques ; *Genome, Human ; *Human Genome Project ; Humans ; Models, Genetic ; Plasmids ; *Sequence Analysis, DNA/methods ; Software
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 152
    Publikationsdatum: 2001-03-10
    Beschreibung: Netrins stimulate and orient axon growth through a mechanism requiring receptors of the DCC family. It has been unclear, however, whether DCC proteins are involved directly in signaling or are mere accessory proteins in a receptor complex. Further, although netrins bind cells expressing DCC, direct binding to DCC has not been demonstrated. Here we show that netrin-1 binds DCC and that the DCC cytoplasmic domain fused to a heterologous receptor ectodomain can mediate guidance through a mechanism involving derepression of cytoplasmic domain multimerization. Activation of the adenosine A2B receptor, proposed to contribute to netrin effects on axons, is not required for rat commissural axon outgrowth or Xenopus spinal axon attraction to netrin-1. Thus, DCC plays a central role in netrin signaling of axon growth and guidance independent of A2B receptor activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stein, E -- Zou, Y -- Poo , M -- Tessier-Lavigne, M -- New York, N.Y. -- Science. 2001 Mar 9;291(5510):1976-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy, Howard Hughes Medical Institute, University of California, San Francisco, CA 94143-0452, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11239160" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Axons/*physiology ; Cell Adhesion Molecules/chemistry/genetics/*metabolism ; Cell Line ; Cell Movement ; Cells, Cultured ; Culture Techniques ; Embryo, Nonmammalian ; Growth Cones/physiology ; Hepatocyte Growth Factor/metabolism/pharmacology ; Ligands ; Nerve Growth Factors/*metabolism/pharmacology ; Neurons/metabolism ; Protein Conformation ; Protein Structure, Tertiary ; Purinergic P1 Receptor Agonists ; Purinergic P1 Receptor Antagonists ; Rats ; Receptor, Adenosine A2B ; Receptors, Cell Surface/chemistry/genetics/*metabolism ; Receptors, Purinergic P1/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Spinal Cord/cytology/metabolism ; *Tumor Suppressor Proteins ; Xanthines/pharmacology ; Xenopus/embryology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 153
    Publikationsdatum: 2001-12-26
    Beschreibung: The transfer of a hydrogen atom-a proton and an electron-is a fundamental process in chemistry and biology. A variety of hydrogen atom transfer reactions, involving iron complexes, phenols, hydroxylamines, tBuOOH, toluene, and related radicals, are shown to follow the Marcus cross relation. Thus, the Marcus theory formalism based on ground-state energetics and self-exchange rates, originally developed for electron transfer processes, is also valuable for hydrogen atom transfer. Compounds that undergo slow proton transfer (C-H bonds) or slow electron transfer (cobalt complexes) also undergo slow hydrogen atom transfer. Limitations of this approach are also discussed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roth, J P -- Yoder, J C -- Won, T J -- Mayer, J M -- 1 F32 GM63383-01/GM/NIGMS NIH HHS/ -- 2 R01 GM50422-05/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2524-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, University of Washington, Box 351700, Seattle, WA 98195-1700, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752572" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Chemistry, Physical ; Cobalt/chemistry ; Cyclic N-Oxides/chemistry ; Electrons ; Ferric Compounds/chemistry ; Ferrous Compounds/chemistry ; Free Radicals ; Hydrogen/*chemistry ; Imidazoles/chemistry ; Kinetics ; Magnetic Resonance Spectroscopy ; Mathematics ; Oxidation-Reduction ; Physicochemical Phenomena ; Protons ; Pyrimidines/chemistry ; Thermodynamics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 154
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2002-02-09
    Beschreibung: Light synchronizes mammalian circadian rhythms with environmental time by modulating retinal input to the circadian pacemaker-the suprachiasmatic nucleus (SCN) of the hypothalamus. Such photic entrainment requires neither rods nor cones, the only known retinal photoreceptors. Here, we show that retinal ganglion cells innervating the SCN are intrinsically photosensitive. Unlike other ganglion cells, they depolarized in response to light even when all synaptic input from rods and cones was blocked. The sensitivity, spectral tuning, and slow kinetics of this light response matched those of the photic entrainment mechanism, suggesting that these ganglion cells may be the primary photoreceptors for this system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Berson, David M -- Dunn, Felice A -- Takao, Motoharu -- EY12793/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2002 Feb 8;295(5557):1070-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Brown University, Providence, RI, 02912 USA. David_Berson@brown.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11834835" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Axons/ultrastructure ; *Biological Clocks ; *Circadian Rhythm ; Dendrites/ultrastructure ; Isoquinolines ; Kinetics ; Light ; *Light Signal Transduction ; Patch-Clamp Techniques ; Rats ; Rats, Sprague-Dawley ; Retinal Ganglion Cells/chemistry/cytology/*physiology ; Rod Opsins/analysis/physiology ; Suprachiasmatic Nucleus/cytology/*physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 155
    Publikationsdatum: 2002-08-24
    Beschreibung: Insulin secretion from intact mouse pancreatic islets was investigated with two-photon excitation imaging. Insulin granule exocytosis occurred mainly toward the interstitial space, away from blood vessels. The fusion pore was unusually stable with a lifetime of 1.8 seconds. Opening of the 1.4-nanometer-diameter pore was preceded by unrestricted lateral diffusion of lipids along the inner wall of the pore, supporting the idea that this structure is composed of membrane lipids. When the pore dilated to 12 nanometers, the granules rapidly flattened and discharged their contents. Thus, our methodology reveals fusion pore dynamics in intact tissues at nanometer resolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Takahashi, Noriko -- Kishimoto, Takuya -- Nemoto, Tomomi -- Kadowaki, Takashi -- Kasai, Haruo -- New York, N.Y. -- Science. 2002 Aug 23;297(5585):1349-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Physiology, National Institute for Physiological Sciences, and the Graduate University of Advanced Studies, Myodaiji, Okazaki 444-8585, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12193788" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Membrane/physiology/*ultrastructure ; Cell Polarity ; Colforsin/pharmacology ; Diffusion ; *Exocytosis ; Extracellular Space ; Fluorescence ; Glucose/pharmacology ; Guinea Pigs ; Image Processing, Computer-Assisted ; Insulin/*secretion ; Intracellular Membranes/physiology/ultrastructure ; Islets of Langerhans/blood supply/*physiology/secretion/*ultrastructure ; Kinetics ; Membrane Fusion ; Membrane Lipids/physiology ; Mice ; Mice, Inbred ICR ; Permeability ; Pyridinium Compounds ; Quaternary Ammonium Compounds ; Rhodamines ; Secretory Vesicles/physiology/*ultrastructure
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 156
    Publikationsdatum: 2002-07-13
    Beschreibung: Poly(ADP-ribose) polymerase-1 (PARP-1) protects the genome by functioning in the DNA damage surveillance network. PARP-1 is also a mediator of cell death after ischemia-reperfusion injury, glutamate excitotoxicity, and various inflammatory processes. We show that PARP-1 activation is required for translocation of apoptosis-inducing factor (AIF) from the mitochondria to the nucleus and that AIF is necessary for PARP-1-dependent cell death. N-methyl-N'-nitro-N-nitrosoguanidine, H2O2, and N-methyl-d-aspartate induce AIF translocation and cell death, which is prevented by PARP inhibitors or genetic knockout of PARP-1, but is caspase independent. Microinjection of an antibody to AIF protects against PARP-1-dependent cytotoxicity. These data support a model in which PARP-1 activation signals AIF release from mitochondria, resulting in a caspase-independent pathway of programmed cell death.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yu, Seong-Woon -- Wang, Hongmin -- Poitras, Marc F -- Coombs, Carmen -- Bowers, William J -- Federoff, Howard J -- Poirier, Guy G -- Dawson, Ted M -- Dawson, Valina L -- New York, N.Y. -- Science. 2002 Jul 12;297(5579):259-63.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology and Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12114629" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Active Transport, Cell Nucleus ; Animals ; Antibodies/immunology ; *Apoptosis ; Apoptosis Inducing Factor ; Caspase Inhibitors ; Caspases/metabolism ; Cell Nucleus/metabolism ; Cells, Cultured ; Cytochrome c Group/metabolism ; Enzyme Activation ; Enzyme Inhibitors/pharmacology ; Flavoproteins/immunology/*metabolism ; Hydrogen Peroxide/pharmacology ; Membrane Potentials ; Membrane Proteins/immunology/*metabolism ; Methylnitronitrosoguanidine/pharmacology ; Mice ; Mice, Knockout ; Mitochondria/metabolism/physiology ; N-Methylaspartate/metabolism/pharmacology ; NAD/metabolism ; Neurons/cytology/physiology ; Oxidative Stress ; Poly(ADP-ribose) Polymerase Inhibitors ; Poly(ADP-ribose) Polymerases/genetics/*metabolism ; Proto-Oncogene Proteins c-bcl-2/metabolism ; Receptors, N-Methyl-D-Aspartate/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 157
    Publikationsdatum: 2002-06-08
    Beschreibung: The central nervous system (CNS) loses the ability to regenerate early during development, but it is not known why. The retina has long served as a simple model system for study of CNS regeneration. Here we show that amacrine cells signal neonatal rat retinal ganglion cells (RGCs) to undergo a profound and apparently irreversible loss of intrinsic axon growth ability. Concurrently, retinal maturation triggers RGCs to greatly increase their dendritic growth ability. These results suggest that adult CNS neurons fail to regenerate not only because of CNS glial inhibition but also because of a loss of intrinsic axon growth ability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldberg, Jeffrey L -- Klassen, Matthew P -- Hua, Ying -- Barres, Ben A -- 2T32GM07365/GM/NIGMS NIH HHS/ -- R01 EY11030/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2002 Jun 7;296(5574):1860-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Stanford University School of Medicine, Department of Neurobiology, Sherman Fairchild Science Building D231, 299 Campus Drive, Stanford, CA 94305-5125, USA. jlgoldbe@stanford.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12052959" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Aging ; Amacrine Cells/*physiology ; Animals ; Animals, Newborn ; Axons/*physiology/ultrastructure ; Cell Aging ; *Cell Communication ; Cell Separation ; Cells, Cultured ; Culture Media, Conditioned ; Culture Techniques ; Cyclic AMP/metabolism ; Dendrites/physiology/ultrastructure ; Embryo, Mammalian ; Nerve Regeneration ; Proto-Oncogene Proteins c-bcl-2/metabolism ; Rats ; Retina/cytology ; Retinal Ganglion Cells/*physiology/transplantation/ultrastructure ; Signal Transduction ; Superior Colliculi/physiology
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  • 158
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2002-12-17
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉de Vlas, Sake J -- Nagelkerke, Nico J D -- Jha, Prabhat -- Plummer, Frank A -- New York, N.Y. -- Science. 2002 Dec 13;298(5601):2129.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12481779" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Anti-HIV Agents/economics/*therapeutic use ; Child ; Developing Countries ; Drug Costs ; Drug Resistance, Viral ; Female ; HIV/drug effects/physiology ; HIV Infections/drug therapy/prevention & control/*transmission/virology ; Humans ; Infant ; Infant, Newborn ; Infectious Disease Transmission, Vertical/*prevention & control ; Pregnancy ; Pregnancy Complications, Infectious/drug therapy ; Viral Load
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 159
    Publikationsdatum: 2002-01-19
    Beschreibung: To explore neuronal mechanisms underlying long-term consequences of stress, we studied stress-induced changes in the neuritic translocation of acetylcholinesterase (AChE) splice variants. Under normal conditions, we found the synaptic AChE-S mRNA and protein in neurites. Corticosterone, anticholinesterases, and forced swim, each facilitated a rapid (minutes), yet long-lasting (weeks), shift from AChE-S to the normally rare AChE-R mRNA, promoted AChE-R mRNA translocation into neurites, and induced enzyme secretion. Weeks after stress, electrophysiological measurements in hippocampus slices displayed apparently normal evoked synaptic responses but extreme hypersensitivity to both anticholinesterases and atropine. Our findings suggest that neuronal hypersensitivity under stress involves neuritic replacement of AChE-S with AChE-R.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meshorer, Eran -- Erb, Christina -- Gazit, Roi -- Pavlovsky, Lev -- Kaufer, Daniela -- Friedman, Alon -- Glick, David -- Ben-Arie, Nissim -- Soreq, Hermona -- New York, N.Y. -- Science. 2002 Jan 18;295(5554):508-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Chemistry, The Institute of Life Sciences and The Eric Roland Center for Neurodegenerative Diseases, The Hebrew University of Jerusalem, Israel 91904.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11799248" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acetylcholine/metabolism ; Acetylcholinesterase/*genetics/*metabolism ; Action Potentials ; *Alternative Splicing ; Animals ; Atropine/pharmacology ; Cells, Cultured ; Cerebellum/cytology ; Cholinesterase Inhibitors/pharmacology ; Corticosterone/pharmacology ; Hippocampus/cytology/metabolism/physiology ; In Situ Hybridization, Fluorescence ; In Vitro Techniques ; Mice ; Mice, Transgenic ; Neurites/*metabolism ; Neurons/*metabolism ; Oligonucleotides, Antisense/pharmacology ; PC12 Cells ; Physostigmine/pharmacology ; RNA, Messenger/genetics/*metabolism ; Rats ; Stress, Physiological/genetics/*physiopathology ; Time Factors
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 160
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2002-12-03
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Montagnier, Luc -- New York, N.Y. -- Science. 2002 Nov 29;298(5599):1727-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉World Foundation for Aids Research and Prevention, 1 rue Miollis, Paris F-75015, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12459575" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): AIDS Serodiagnosis/history ; Acquired Immunodeficiency Syndrome/drug therapy/*history/transmission/virology ; Animals ; Anti-HIV Agents/history/therapeutic use ; CD4-Positive T-Lymphocytes/virology ; Cells, Cultured ; *HIV/classification/isolation & purification/physiology/ultrastructure ; History, 20th Century ; Humans ; T-Lymphocytes/virology ; Virus Cultivation
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 161
    Publikationsdatum: 2002-01-19
    Beschreibung: Application of nerve growth factor (NGF) covalently cross-linked to beads increased the phosphorylation of TrkA and Akt, but not of mitogen-activated protein kinase, in cultured rat sympathetic neurons. NGF beads or iodine-125-labeled NGF beads supplied to distal axons resulted in the survival of over 80% of the neurons for 30 hours, with little or no retrograde transport of iodine-125-labeled NGF; whereas application of free iodine-125-labeled NGF (0.5 nanograms per milliliter) produced 20-fold more retrograde transport, but only 29% of the neurons survived. Thus, in contrast to widely accepted theory, a neuronal survival signal can reach the cell bodies unaccompanied by the NGF that initiated it.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉MacInnis, Bronwyn L -- Campenot, Robert B -- New York, N.Y. -- Science. 2002 Feb 22;295(5559):1536-9. Epub 2002 Jan 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, 6-14 Medical Sciences Building, University of Alberta, Edmonton, Alberta, Canada, T6G 2H7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11799202" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Axons/*metabolism ; Cell Survival/drug effects ; Cells, Cultured ; Chromones/pharmacology ; Cross-Linking Reagents ; Enzyme Inhibitors/pharmacology ; Iodine Radioisotopes ; Microspheres ; Mitogen-Activated Protein Kinases/metabolism ; Morpholines/pharmacology ; Nerve Growth Factor/*metabolism/pharmacology ; Neurons/metabolism/*physiology ; Phosphatidylinositol 3-Kinases/antagonists & inhibitors/metabolism ; Phosphorylation ; Protein Transport ; *Protein-Serine-Threonine Kinases ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-akt ; Rats ; Rats, Sprague-Dawley ; Receptor, trkA/metabolism ; Signal Transduction ; Superior Cervical Ganglion
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 162
    Publikationsdatum: 2002-06-29
    Beschreibung: Myeloperoxidase (MPO) is an abundant mammalian phagocyte hemoprotein thought to primarily mediate host defense reactions. Although its microbicidal functions are well established in vitro, humans deficient in MPO are not at unusual risk of infection. MPO was observed herein to modulate the vascular signaling and vasodilatory functions of nitric oxide (NO) during acute inflammation. After leukocyte degranulation, MPO localized in and around vascular endothelial cells in a rodent model of acute endotoxemia and impaired endothelium-dependent relaxant responses, to which MPO-deficient mice were resistant. Altered vascular responsiveness was due to catalytic consumption of NO by substrate radicals generated by MPO. Thus MPO can directly modulate vascular inflammatory responses by regulating NO bioavailability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eiserich, Jason P -- Baldus, Stephan -- Brennan, Marie-Luise -- Ma, Wenxin -- Zhang, Chunxiang -- Tousson, Albert -- Castro, Laura -- Lusis, Aldons J -- Nauseef, William M -- White, C Roger -- Freeman, Bruce A -- I01 BX000513/BX/BLRD VA/ -- R01 HL067930/HL/NHLBI NIH HHS/ -- R03 TW005682/TW/FIC NIH HHS/ -- New York, N.Y. -- Science. 2002 Jun 28;296(5577):2391-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, Division of Nephrology, University of California, Davis, CA 95616, USA. jpeiserich@ucdavis.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12089442" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Aorta ; Catalysis ; Cattle ; Cells, Cultured ; Chromans/metabolism/pharmacology ; Coculture Techniques ; Cyclic GMP/metabolism ; Endothelium, Vascular/enzymology/*physiology ; Endotoxemia/enzymology ; Humans ; Hydrogen Peroxide/metabolism/pharmacology ; Inflammation/*enzymology/physiopathology ; Leukocytes/*enzymology ; Mice ; Mice, Inbred C57BL ; Muscle, Smooth, Vascular/metabolism ; Mutation ; Nitric Oxide/*metabolism ; Oxidation-Reduction ; Peroxidase/genetics/*metabolism ; Rats ; Rats, Sprague-Dawley ; Signal Transduction ; Transfection ; Tumor Cells, Cultured ; *Vasodilation
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 163
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2002-01-26
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chicurel, Marina -- New York, N.Y. -- Science. 2002 Jan 25;295(5555):606-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11809950" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Actins/physiology ; Animals ; Bacterial Physiological Phenomena ; Cell Adhesion ; Cell Membrane/physiology ; *Cell Movement ; Computer Simulation ; Cytological Techniques ; Genes ; Mass Spectrometry/methods ; Microscopy, Fluorescence ; Models, Biological ; Proteins/physiology ; Pseudopodia/physiology ; Software ; Spectrometry, Fluorescence
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 164
    Publikationsdatum: 2002-06-01
    Beschreibung: The high degree of similarity between the mouse and human genomes is demonstrated through analysis of the sequence of mouse chromosome 16 (Mmu 16), which was obtained as part of a whole-genome shotgun assembly of the mouse genome. The mouse genome is about 10% smaller than the human genome, owing to a lower repetitive DNA content. Comparison of the structure and protein-coding potential of Mmu 16 with that of the homologous segments of the human genome identifies regions of conserved synteny with human chromosomes (Hsa) 3, 8, 12, 16, 21, and 22. Gene content and order are highly conserved between Mmu 16 and the syntenic blocks of the human genome. Of the 731 predicted genes on Mmu 16, 509 align with orthologs on the corresponding portions of the human genome, 44 are likely paralogous to these genes, and 164 genes have homologs elsewhere in the human genome; there are 14 genes for which we could find no human counterpart.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mural, Richard J -- Adams, Mark D -- Myers, Eugene W -- Smith, Hamilton O -- Miklos, George L Gabor -- Wides, Ron -- Halpern, Aaron -- Li, Peter W -- Sutton, Granger G -- Nadeau, Joe -- Salzberg, Steven L -- Holt, Robert A -- Kodira, Chinnappa D -- Lu, Fu -- Chen, Lin -- Deng, Zuoming -- Evangelista, Carlos C -- Gan, Weiniu -- Heiman, Thomas J -- Li, Jiayin -- Li, Zhenya -- Merkulov, Gennady V -- Milshina, Natalia V -- Naik, Ashwinikumar K -- Qi, Rong -- Shue, Bixiong Chris -- Wang, Aihui -- Wang, Jian -- Wang, Xin -- Yan, Xianghe -- Ye, Jane -- Yooseph, Shibu -- Zhao, Qi -- Zheng, Liansheng -- Zhu, Shiaoping C -- Biddick, Kendra -- Bolanos, Randall -- Delcher, Arthur L -- Dew, Ian M -- Fasulo, Daniel -- Flanigan, Michael J -- Huson, Daniel H -- Kravitz, Saul A -- Miller, Jason R -- Mobarry, Clark M -- Reinert, Knut -- Remington, Karin A -- Zhang, Qing -- Zheng, Xiangqun H -- Nusskern, Deborah R -- Lai, Zhongwu -- Lei, Yiding -- Zhong, Wenyan -- Yao, Alison -- Guan, Ping -- Ji, Rui-Ru -- Gu, Zhiping -- Wang, Zhen-Yuan -- Zhong, Fei -- Xiao, Chunlin -- Chiang, Chia-Chien -- Yandell, Mark -- Wortman, Jennifer R -- Amanatides, Peter G -- Hladun, Suzanne L -- Pratts, Eric C -- Johnson, Jeffery E -- Dodson, Kristina L -- Woodford, Kerry J -- Evans, Cheryl A -- Gropman, Barry -- Rusch, Douglas B -- Venter, Eli -- Wang, Mei -- Smith, Thomas J -- Houck, Jarrett T -- Tompkins, Donald E -- Haynes, Charles -- Jacob, Debbie -- Chin, Soo H -- Allen, David R -- Dahlke, Carl E -- Sanders, Robert -- Li, Kelvin -- Liu, Xiangjun -- Levitsky, Alexander A -- Majoros, William H -- Chen, Quan -- Xia, Ashley C -- Lopez, John R -- Donnelly, Michael T -- Newman, Matthew H -- Glodek, Anna -- Kraft, Cheryl L -- Nodell, Marc -- Ali, Feroze -- An, Hui-Jin -- Baldwin-Pitts, Danita -- Beeson, Karen Y -- Cai, Shuang -- Carnes, Mark -- Carver, Amy -- Caulk, Parris M -- Center, Angela -- Chen, Yen-Hui -- Cheng, Ming-Lai -- Coyne, My D -- Crowder, Michelle -- Danaher, Steven -- Davenport, Lionel B -- Desilets, Raymond -- Dietz, Susanne M -- Doup, Lisa -- Dullaghan, Patrick -- Ferriera, Steven -- Fosler, Carl R -- Gire, Harold C -- Gluecksmann, Andres -- Gocayne, Jeannine D -- Gray, Jonathan -- Hart, Brit -- Haynes, Jason -- Hoover, Jeffery -- Howland, Tim -- Ibegwam, Chinyere -- Jalali, Mena -- Johns, David -- Kline, Leslie -- Ma, Daniel S -- MacCawley, Steven -- Magoon, Anand -- Mann, Felecia -- May, David -- McIntosh, Tina C -- Mehta, Somil -- Moy, Linda -- Moy, Mee C -- Murphy, Brian J -- Murphy, Sean D -- Nelson, Keith A -- Nuri, Zubeda -- Parker, Kimberly A -- Prudhomme, Alexandre C -- Puri, Vinita N -- Qureshi, Hina -- Raley, John C -- Reardon, Matthew S -- Regier, Megan A -- Rogers, Yu-Hui C -- Romblad, Deanna L -- Schutz, Jakob -- Scott, John L -- Scott, Richard -- Sitter, Cynthia D -- Smallwood, Michella -- Sprague, Arlan C -- Stewart, Erin -- Strong, Renee V -- Suh, Ellen -- Sylvester, Karena -- Thomas, Reginald -- Tint, Ni Ni -- Tsonis, Christopher -- Wang, Gary -- Wang, George -- Williams, Monica S -- Williams, Sherita M -- Windsor, Sandra M -- Wolfe, Keriellen -- Wu, Mitchell M -- Zaveri, Jayshree -- Chaturvedi, Kabir -- Gabrielian, Andrei E -- Ke, Zhaoxi -- Sun, Jingtao -- Subramanian, Gangadharan -- Venter, J Craig -- Pfannkoch, Cynthia M -- Barnstead, Mary -- Stephenson, Lisa D -- New York, N.Y. -- Science. 2002 May 31;296(5573):1661-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Celera Genomics, 45 West Gude Drive, Rockville, MD 20850, USA. richard.mural@celera.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12040188" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Base Composition ; Chromosomes/*genetics ; Chromosomes, Human/genetics ; Computational Biology ; Conserved Sequence ; Databases, Nucleic Acid ; Evolution, Molecular ; Genes ; Genetic Markers ; *Genome ; *Genome, Human ; Genomics ; Humans ; Mice ; Mice, Inbred A/genetics ; Mice, Inbred DBA/genetics ; Mice, Inbred Strains/*genetics ; Molecular Sequence Data ; Physical Chromosome Mapping ; Proteins/chemistry/genetics ; Sequence Alignment ; *Sequence Analysis, DNA ; Species Specificity ; *Synteny
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    Standort Signatur Erwartet Verfügbarkeit
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  • 165
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-07-06
    Beschreibung: Often left out of news reports of cloned animals is the fact that for every 100 attempts, just two or three live offspring typically result. Now many researchers are going back to the lab to attempt to find out why. They are probing fundamental questions of cell biology, as well as trying to figure out whether there is something inherently flawed in "asexual" reproduction in mammals, or whether some problem lies in the in vitro component of the process. For now, the serious obstacles suggest that human cloning may be a long way off.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- Vogel, G -- New York, N.Y. -- Science. 2000 Jun 9;288(5472):1722-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10877684" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Animals, Domestic/embryology/genetics ; Animals, Genetically Modified ; Bioethics ; Cell Differentiation ; Cell Division ; *Cloning, Organism/adverse effects/economics/methods ; Embryo Transfer ; Embryo, Mammalian/cytology ; Female ; Gene Targeting ; Gene Transfer Techniques ; Humans ; Mice/embryology/genetics ; Nuclear Transfer Techniques ; Pregnancy ; Primates/embryology/genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 166
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-09-02
    Beschreibung: Low success rates and unpredictable results have plagued cloning researchers, particularly those trying to clone pigs. Now, on page 1188, Japanese researchers offer the first scientific report of a cloned pig, named Xena, raising hopes that pigs could one day provide an unlimited supply of organs for transplantation thanks to their close physiological relationship to humans. But this week those hopes were dealt a blow by more evidence suggesting that pig retroviruses can infect human cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- Normile, D -- New York, N.Y. -- Science. 2000 Aug 18;289(5482):1118-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10970216" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cloning, Organism/*methods ; Embryo Transfer ; Female ; Fibroblasts/ultrastructure ; Japan ; Microinjections ; Nuclear Transfer Techniques ; Pregnancy ; *Swine/embryology/genetics ; Transplantation, Heterologous
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    Standort Signatur Erwartet Verfügbarkeit
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  • 167
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-08-06
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickelgren, I -- New York, N.Y. -- Science. 2000 Jul 7;289(5476):23-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10928921" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Aldosterone/metabolism ; Female ; Humans ; Hypertension/etiology/*genetics/metabolism ; Kidney/metabolism ; Male ; *Point Mutation ; Pregnancy ; Pregnancy Complications, Cardiovascular/etiology/metabolism ; Progesterone/*metabolism ; Protein Structure, Secondary ; Receptors, Mineralocorticoid/chemistry/*genetics/*metabolism ; Sodium Chloride/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 168
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-02-07
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lander, E S -- Weinberg, R A -- New York, N.Y. -- Science. 2000 Mar 10;287(5459):1777-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology at the Massachusetts Institute of Technology, Cambridge, MA 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10755930" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Chromosome Mapping ; Chromosomes/genetics ; Cloning, Molecular ; DNA/chemistry/genetics ; DNA, Recombinant ; Evolution, Molecular ; Genes ; Genetic Code ; Genetics/*history/trends ; Genetics, Medical/history/trends ; History, 19th Century ; History, 20th Century ; Human Genome Project ; Humans ; Sequence Analysis, DNA
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 169
    Publikationsdatum: 2000-02-11
    Beschreibung: The deleterious effects of ethanol on the developing human brain are poorly understood. Here it is reported that ethanol, acting by a dual mechanism [blockade of N-methyl-D-aspartate (NMDA) glutamate receptors and excessive activation of GABA(A) receptors], triggers widespread apoptotic neurodegeneration in the developing rat forebrain. Vulnerability coincides with the period of synaptogenesis, which in humans extends from the sixth month of gestation to several years after birth. During this period, transient ethanol exposure can delete millions of neurons from the developing brain. This can explain the reduced brain mass and neurobehavioral disturbances associated with human fetal alcohol syndrome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ikonomidou, C -- Bittigau, P -- Ishimaru, M J -- Wozniak, D F -- Koch, C -- Genz, K -- Price, M T -- Stefovska, V -- Horster, F -- Tenkova, T -- Dikranian, K -- Olney, J W -- AG 11355/AG/NIA NIH HHS/ -- DA 05072/DA/NIDA NIH HHS/ -- MH 38894/MH/NIMH NIH HHS/ -- etc. -- New York, N.Y. -- Science. 2000 Feb 11;287(5455):1056-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatric Neurology, Charite, Virchow Clinics, Humboldt University, Augustenburger Platz 1, 13353 Berlin, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10669420" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Apoptosis ; Benzodiazepines/pharmacology ; Dose-Response Relationship, Drug ; Ethanol/administration & dosage/blood/*toxicity ; Female ; Fetal Alcohol Spectrum Disorders/*pathology ; GABA Modulators/pharmacology ; Humans ; *Nerve Degeneration ; Neurons/cytology/pathology ; Organ Size/drug effects ; Pregnancy ; Prosencephalon/cytology/*drug effects/embryology/growth & development ; Rats ; Rats, Sprague-Dawley ; Receptors, GABA-A/*drug effects/metabolism ; Receptors, N-Methyl-D-Aspartate/antagonists & inhibitors/*drug effects/metabolism ; Synapses/drug effects/physiology
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  • 170
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-08-12
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 2000 Jul 28;289(5479):522-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10939956" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Apoptosis ; Embryonic Induction ; Eye/*embryology ; Fishes/*embryology/genetics ; Genes ; Lens, Crystalline/cytology/*embryology/physiology/transplantation
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 171
    Publikationsdatum: 2000-07-15
    Beschreibung: p53 plays an essential pro-apoptotic role, a function thought to be shared with its family members p73 and p63. Here, we show that p73 is primarily present in developing neurons as a truncated isoform whose levels are dramatically decreased when sympathetic neurons apoptose after nerve growth factor (NGF) withdrawal. Increased expression of truncated p73 rescues these neurons from apoptosis induced by NGF withdrawal or p53 overexpression. In p73-/- mice, all isoforms of p73 are deleted and the apoptosis of developing sympathetic neurons is greatly enhanced. Thus, truncated p73 is an essential anti-apoptotic protein in neurons, serving to counteract the pro-apoptotic function of p53.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pozniak, C D -- Radinovic, S -- Yang, A -- McKeon, F -- Kaplan, D R -- Miller, F D -- New York, N.Y. -- Science. 2000 Jul 14;289(5477):304-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Neuronal Survival, Brain Tumor Research Center, Montreal Neurological Institute, McGill University, Montreal, Canada H3A 2B4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10894779" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenoviridae/genetics ; Animals ; Apoptosis/*physiology ; Cells, Cultured ; DNA-Binding Proteins/biosynthesis/chemistry/*physiology ; Escherichia coli ; Genes, Tumor Suppressor ; Humans ; Mice ; Mice, Inbred BALB C ; Nerve Growth Factor/pharmacology ; Neurons/*physiology ; Nuclear Proteins/biosynthesis/chemistry/*physiology ; Protein Isoforms/biosynthesis/chemistry/physiology ; Recombinant Proteins ; Sympathetic Nervous System/cytology/*physiology ; Tumor Suppressor Protein p53/antagonists & inhibitors/*physiology ; Tumor Suppressor Proteins
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 172
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-07-07
    Beschreibung: In Neurospora crassa, white collar 1 (WC-1), a transcriptional activator and positive clock element, is rhythmically expressed from a nonrhythmic steady-state pool of wc-1 transcript, consistent with posttranscriptional regulation of rhythmicity. Mutations in frq influence both the level and periodicity of WC-1 expression, and driven FRQ expression not only depresses its own endogenous levels, but positively regulates WC-1 synthesis with a lag of about 8 hours, a delay similar to that seen in the wild-type clock. FRQ thus plays dual roles in the Neurospora clock and thereby, with WC-1, forms a second feedback loop that would promote robustness and stability in this circadian system. The existence also of interlocked loops in Drosophila melanogaster and mouse clocks suggests that such interlocked loops may be a conserved aspect of circadian timing systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, K -- Loros, J J -- Dunlap, J C -- MH44651/MH/NIMH NIH HHS/ -- R37-GM 34985/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Jul 7;289(5476):107-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Dartmouth Medical School, Hanover, NH 03755-3844, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10884222" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; *Circadian Rhythm ; DNA-Binding Proteins/biosynthesis/chemistry/genetics/*metabolism ; Darkness ; Feedback ; Fungal Proteins/genetics/*metabolism ; Gene Expression Regulation, Fungal ; Humans ; Kinetics ; Light ; Molecular Sequence Data ; Mutation ; Neurospora crassa/genetics/metabolism/*physiology ; Phosphorylation ; RNA, Fungal/genetics/metabolism ; RNA, Messenger/genetics/metabolism ; Sequence Alignment ; Signal Transduction ; Transcription Factors/biosynthesis/chemistry/genetics/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 173
    Publikationsdatum: 2000-01-15
    Beschreibung: Primates that are identical in both nuclear and cytoplasmic components have not been produced by current cloning strategies, yet such identicals represent the ideal model for investigations of human diseases. Here, genetically identical nonhuman embryos were produced as twin and larger sets by separation and reaggregation of blastomeres of cleavage-stage embryos. A total of 368 multiples were created by the splitting of 107 rhesus embryos with four pregnancies established after 13 embryo transfers (31% versus 53% in vitro fertilization controls). The birth of Tetra, a healthy female cloned from a quarter of an embryo, proves that this approach can result in live offspring.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chan, A W -- Dominko, T -- Luetjens, C M -- Neuber, E -- Martinovich, C -- Hewitson, L -- Simerly, C R -- Schatten, G P -- New York, N.Y. -- Science. 2000 Jan 14;287(5451):317-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Oregon Regional Primate Research Center, Beaverton, OR 97006, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10634789" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Apoptosis ; Blastocyst/physiology ; Blastomeres/*physiology ; Cleavage Stage, Ovum/*physiology ; Cloning, Organism/*methods ; Embryo Transfer ; *Embryonic and Fetal Development ; Female ; Macaca mulatta/*embryology ; Pregnancy ; Twins, Monozygotic ; Zona Pellucida/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 174
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-02-24
    Beschreibung: Alka Agrawal grew up in Farmington Hills, near Detroit, Michigan, and earned her bachelor's degree in chemical engineering from the University of Michigan. Dr. Agrawal entered the pharmacology graduate school program at Yale University and began working in the laboratory of David Schatz, investigating the role of DNA repair proteins in V(D)J recombination. The development of an in vitro V(D)J cleavage system in the laboratory changed her focus and she began studying the cleavage mechanism as part of her doctoral research. Exposure to science policy at the National Academy of Sciences, and to science journalism through the AAAS Mass Media Science and Engineering Fellows Program, prompted Dr. Agrawal to pursue a career in science writing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Agrawal, A -- New York, N.Y. -- Science. 2000 Dec 1;290(5497):1715-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11186395" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Allergens ; Animals ; Antigens, Plant ; Awards and Prizes ; DNA/genetics/metabolism ; *DNA Transposable Elements ; *Evolution, Molecular ; Gene Rearrangement ; Genes ; History, 20th Century ; Homeodomain Proteins/genetics/metabolism ; Plant Proteins/genetics/metabolism ; Receptors, Antigen/*genetics ; *Recombination, Genetic ; United States
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 175
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-02-12
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ross, J A -- New York, N.Y. -- Science. 2000 Jan 21;287(5452):427.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10671164" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Child ; Data Collection ; Environmental Exposure/adverse effects ; Female ; Genetic Predisposition to Disease ; Humans ; Interviews as Topic ; Leukemia/etiology/genetics ; Neoplasms/*etiology/genetics ; Pregnancy ; Prenatal Exposure Delayed Effects
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 176
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-08-12
    Beschreibung: When researchers in Edmonton, Canada, announced last month that a new procedure for transplanting pancreatic islet cells had freed seven adults with type I diabetes from taking insulin, the results generated a great deal of public enthusiasm. Some important caveats tended to get lost, however. One drawback is that transplant recipients would need to take immunosuppressive drugs for the rest of their lives to keep from rejecting the tissue. But more importantly, even if the benefits of the transplants outweigh the risks of the drugs, there's just not enough islet tissue to go around and there won't be anytime soon.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zwillich, T -- New York, N.Y. -- Science. 2000 Jul 28;289(5479):531-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10939961" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blood Glucose/metabolism ; Cell Culture Techniques ; Cell Division ; Cells, Cultured ; Diabetes Mellitus, Type 1/*surgery ; Embryo, Mammalian ; Graft Rejection/prevention & control ; Humans ; Immunosuppressive Agents/therapeutic use ; Insulin/biosynthesis ; Islets of Langerhans/*cytology/metabolism ; *Islets of Langerhans Transplantation ; Mice ; Stem Cells/cytology ; Tissue Donors
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 177
    Publikationsdatum: 2000-10-06
    Beschreibung: Benzodiazepine tranquilizers are used in the treatment of anxiety disorders. To identify the molecular and neuronal target mediating the anxiolytic action of benzodiazepines, we generated and analyzed two mouse lines in which the alpha2 or alpha3 GABAA (gamma-aminobutyric acid type A) receptors, respectively, were rendered insensitive to diazepam by a knock-in point mutation. The anxiolytic action of diazepam was absent in mice with the alpha2(H101R) point mutation but present in mice with the alpha3(H126R) point mutation. These findings indicate that the anxiolytic effect of benzodiazepine drugs is mediated by alpha2 GABAA receptors, which are largely expressed in the limbic system, but not by alpha3 GABAA receptors, which predominate in the reticular activating system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Low, K -- Crestani, F -- Keist, R -- Benke, D -- Brunig, I -- Benson, J A -- Fritschy, J M -- Rulicke, T -- Bluethmann, H -- Mohler, H -- Rudolph, U -- New York, N.Y. -- Science. 2000 Oct 6;290(5489):131-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Pharmacology and Toxicology, University of Zurich, and Swiss Federal Institute of Technology Zurich (ETH), Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11021797" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Anti-Anxiety Agents/metabolism/*pharmacology ; Behavior, Animal/drug effects ; Binding Sites ; Brain/drug effects/metabolism ; Cells, Cultured ; Diazepam/metabolism/*pharmacology ; Dose-Response Relationship, Drug ; Female ; Gene Targeting ; Hippocampus/cytology ; Membrane Potentials/drug effects ; Mice ; Patch-Clamp Techniques ; Phenobarbital/pharmacology ; Point Mutation ; Pyramidal Cells/drug effects/physiology ; Receptors, GABA-A/chemistry/genetics/*metabolism ; Synaptic Transmission ; gamma-Aminobutyric Acid/pharmacology
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  • 178
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-07-15
    Beschreibung: AIDS researchers are finding cheaper and simpler ways to slow the spread of HIV from mother to child, and more pregnant women, even in the poorest countries, have access to anti-HIV drugs and formula--thanks to the largesse of donors, discounts from industry, new trade laws, and the tenacity of individual clinicians. But just as researchers offer ways to clear one enormous hurdle--drug availability--they run smack into other ones, ranging from social stigmas that discourage testing to disinterest on the part of cash-strapped health authorities to a deeply ingrained culture of breast-feeding--often supported by government policy for otherwise sound health reasons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 2000 Jun 23;288(5474):2160-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10896599" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): AIDS Serodiagnosis ; Africa South of the Sahara ; Anti-HIV Agents/*therapeutic use ; Breast Feeding/*adverse effects ; Clinical Trials as Topic ; Female ; HIV Infections/drug therapy/*prevention & control/*transmission ; Humans ; Infant, Newborn ; *Infectious Disease Transmission, Vertical ; Nevirapine/therapeutic use ; Pregnancy ; Pregnancy Complications, Infectious/*drug therapy ; Social Conditions ; Zidovudine/therapeutic use
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 179
    Publikationsdatum: 2000-12-23
    Beschreibung: Niemann-Pick type C2 disease (NP-C2) is a fatal hereditary disorder of unknown etiology characterized by defective egress of cholesterol from lysosomes. Here we show that the disease is caused by a deficiency in HE1, a ubiquitously expressed lysosomal protein identified previously as a cholesterol-binding protein. HE1 was undetectable in fibroblasts from NP-C2 patients but present in fibroblasts from unaffected controls and NP-C1 patients. Mutations in the HE1 gene, which maps to chromosome 14q24.3, were found in NP-C2 patients but not in controls. Treatment of NP-C2 fibroblasts with exogenous recombinant HE1 protein ameliorated lysosomal accumulation of low density lipoprotein-derived cholesterol.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Naureckiene, S -- Sleat, D E -- Lackland, H -- Fensom, A -- Vanier, M T -- Wattiaux, R -- Jadot, M -- Lobel, P -- DK45992/DK/NIDDK NIH HHS/ -- DK54317/DK/NIDDK NIH HHS/ -- NS37918/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2000 Dec 22;290(5500):2298-301.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Advanced Biotechnology and Medicine, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, Piscataway, NJ, 08854, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11125141" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; Biological Transport ; CHO Cells ; *Carrier Proteins ; Cell Membrane/metabolism ; Cells, Cultured ; Cholesterol/*metabolism ; Cricetinae ; Culture Media, Conditioned ; Fibroblasts/metabolism ; Glycoproteins/chemistry/*genetics/*metabolism/pharmacology ; Humans ; Lysosomes/*metabolism ; Molecular Sequence Data ; Mutation ; Niemann-Pick Diseases/*genetics/metabolism ; Rats ; Receptor, IGF Type 2/metabolism ; Recombinant Proteins/metabolism/pharmacology ; Transfection
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 180
    Publikationsdatum: 2000-08-26
    Beschreibung: Prion proteins can serve as genetic elements by adopting distinct physical and functional states that are self-perpetuating and heritable. The critical region of one prion protein, Sup35, is initially unstructured in solution and then forms self-seeded amyloid fibers. We examined in vitro the mechanism by which this state is attained and replicated. Structurally fluid oligomeric complexes appear to be crucial intermediates in de novo amyloid nucleus formation. Rapid assembly ensues when these complexes conformationally convert upon association with nuclei. This model for replicating protein-based genetic information, nucleated conformational conversion, may be applicable to other protein assembly processes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Serio, T R -- Cashikar, A G -- Kowal, A S -- Sawicki, G J -- Moslehi, J J -- Serpell, L -- Arnsdorf, M F -- Lindquist, S L -- GM025874/GM/NIGMS NIH HHS/ -- GM57840/GM/NIGMS NIH HHS/ -- P41-RR017777/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2000 Aug 25;289(5483):1317-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Genetics and Cell Biology, Howard Hughes Medical Institute, University of Chicago, Chicago, IL 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10958771" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amyloid/*chemistry ; Biopolymers/chemistry ; Centrifugation, Density Gradient ; Circular Dichroism ; Electrophoresis, Polyacrylamide Gel ; Endopeptidases/metabolism ; Fungal Proteins/*chemistry/metabolism/ultrastructure ; Kinetics ; Light ; Micelles ; Microscopy, Atomic Force ; Microscopy, Electron ; Models, Chemical ; Peptide Termination Factors ; Prions/*chemistry/metabolism/ultrastructure ; Protein Conformation ; Protein Folding ; *Saccharomyces cerevisiae Proteins ; Scattering, Radiation ; Solubility ; Sonication
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  • 181
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-12-23
    Beschreibung: Niemann-Pick C1 (NPC1) disease is characterized by cholesterol accumulation in lysosomes and aberrant feedback regulation of cellular cholesterol homeostasis. We provide evidence that the NPC1 protein has homology with the resistance-nodulation-division (RND) family of prokaryotic permeases and may normally function as a transmembrane efflux pump. Studies of acriflavine loading in normal and NPC1 fibroblasts indicated that NPC1 uses a proton motive force to remove accumulated acriflavine from the endosomal/lysosomal system. Expression of NPC1 in Escherichia coli (i) facilitated the transport of acriflavine across the plasma membrane, causing cytosolic accumulation, and (ii) resulted in transport of oleic acid but not cholesterol or cholesterol-oleate across the plasma membrane. These studies establish NPC1 as a eukaryotic member of the RND permease family.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davies, J P -- Chen, F W -- Ioannou, Y A -- R01 DK54736/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2000 Dec 22;290(5500):2295-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Genetics, Box 1498, The Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, NY 10029, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11125140" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acriflavine/metabolism ; Amino Acid Motifs ; Amino Acid Sequence ; Biological Transport ; *Carrier Proteins ; Cell Membrane/metabolism ; Cells, Cultured ; Cholesterol/metabolism ; Cholesterol Esters/metabolism ; Endosomes/metabolism ; Escherichia coli/genetics/metabolism ; Fibroblasts ; Fluorescence ; Fluorescent Dyes/metabolism ; Humans ; Lysosomes/metabolism ; *Membrane Glycoproteins ; Membrane Proteins/chemistry ; Membrane Transport Proteins/chemistry/*metabolism ; Molecular Sequence Data ; Niemann-Pick Diseases/genetics/*metabolism ; Oleic Acid/metabolism ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Proteins/chemistry/*metabolism ; Proton-Motive Force ; Recombinant Proteins/metabolism ; Sequence Alignment
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  • 182
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-05-29
    Beschreibung: The ets family transcription factor PU.1 is required for the development of multiple lineages of the immune system. Using retroviral transduction of PU.1 complementary DNA into mutant hematopoietic progenitors, we demonstrate that differing concentrations of the protein regulate the development of B lymphocytes as compared with macrophages. A low concentration of PU. 1 protein induces the B cell fate, whereas a high concentration promotes macrophage differentiation and blocks B cell development. Conversely, a transcriptionally weakened mutant protein preferentially induces B cell generation. Our results suggest that graded expression of a transcription factor can be used to specify distinct cell fates in the hematopoietic system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DeKoter, R P -- Singh, H -- New York, N.Y. -- Science. 2000 May 26;288(5470):1439-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Molecular Genetics and Cell Biology, The University of Chicago, 5841 South Maryland Avenue, MC1028, Chicago, IL 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10827957" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; B-Lymphocytes/cytology/*physiology ; Cell Differentiation ; Cell Division ; Cell Lineage ; Cells, Cultured ; Coculture Techniques ; DNA, Complementary ; Gene Expression ; Genetic Vectors ; Green Fluorescent Proteins ; Hematopoiesis ; Hematopoietic Stem Cells/cytology/*physiology ; Luminescent Proteins/genetics ; Macrophages/cytology/*physiology ; Mice ; Mutation ; Proto-Oncogene Proteins/*genetics/*physiology ; Retroviridae/genetics ; Trans-Activators/*genetics/*physiology ; Transduction, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 183
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2000-06-08
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2000 May 19;288(5469):1160-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10841731" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Carrier Proteins/genetics ; Genes ; *Genetic Testing ; Humans ; Leptin/genetics ; Male ; Mice ; Mutation ; Obesity/*genetics ; Osteogenesis Imperfecta/*genetics ; *Receptors, Cell Surface ; Receptors, Leptin ; Zebrafish/*genetics/growth & development
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 184
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-05-02
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 2001 Apr 27;292(5517):615.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11330303" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acquired Immunodeficiency Syndrome/*etiology/transmission ; Animals ; Cells, Cultured ; DNA/analysis ; *Drug Contamination ; Evolution, Molecular ; *HIV/classification ; Humans ; Pan troglodytes/virology ; Poliovirus/growth & development ; *Poliovirus Vaccine, Oral/adverse effects/chemistry ; Simian Immunodeficiency Virus ; Virus Cultivation
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 185
    Publikationsdatum: 2001-03-10
    Beschreibung: Assessing the energy costs of development in extreme environments is important for understanding how organisms can exist at the margins of the biosphere. Macromolecular turnover rates of RNA and protein were measured at -1.5 degrees C during early development of an Antarctic sea urchin. Contrary to expectations of low synthesis with low metabolism at low temperatures, protein and RNA synthesis rates exhibited temperature compensation and were equivalent to rates in temperate sea urchin embryos. High protein metabolism with a low metabolic rate is energetically possible in this Antarctic sea urchin because the energy cost of protein turnover, 0.45 joules per milligram of protein, is 1/25th the values reported for other animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marsh, A G -- Maxson , R E Jr -- Manahan, D T -- New York, N.Y. -- Science. 2001 Mar 9;291(5510):1950-2. Epub 2001 Feb 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11239152" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antarctic Regions ; Blastocyst/metabolism ; Cold Temperature ; Embryo, Nonmammalian/metabolism ; Energy Metabolism ; Half-Life ; Kinetics ; *Oxygen Consumption ; *Protein Biosynthesis ; Proteins/metabolism ; RNA/*biosynthesis/metabolism ; RNA, Messenger/biosynthesis/metabolism ; Sea Urchins/*embryology/growth & development/*metabolism ; Temperature
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 186
    Publikationsdatum: 2001-02-27
    Beschreibung: Previous findings suggest that during cognate T cell-B cell interactions, major histocompatability complex (MHC) class II molecules transduce signals, leading to Src-family kinase activation, Ca2+ mobilization, and proliferation. Here, we show that antigen stimulation of resting B cells induces MHC class II molecules to associate with Immunoglobulin (Ig)-alpha/Ig-beta (CD79a/CD79b) heterodimers, which function as signal transducers upon MHC class II aggregation by the T cell receptor (TCR). The B cell receptor (BCR) and MHC class II/Ig-alpha/Ig-beta are distinct complexes, yet class II-associated Ig-alpha/beta appears to be derived from BCR. Hence, Ig-alpha/beta are used in a sequential fashion for transduction of antigen and cognate T cell help signals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lang, P -- Stolpa, J C -- Freiberg, B A -- Crawford, F -- Kappler, J -- Kupfer, A -- Cambier, J C -- AI 20519/AI/NIAID NIH HHS/ -- AI 22295/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2001 Feb 23;291(5508):1537-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Integrated Department of Immunology, University of Colorado Health Sciences Center, and National Jewish Medical and Research Center, 1400 Jackson Street, Denver, CO 80206, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11222857" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antigens/immunology ; Antigens, CD/*metabolism ; Antigens, CD79 ; B-Lymphocytes/*immunology/metabolism ; Cells, Cultured ; Dimerization ; Enzyme Activation ; Histocompatibility Antigens Class II/immunology/*metabolism ; Immunoblotting ; Lymphocyte Activation ; Mice ; Mice, Transgenic ; Phosphorylation ; Phosphotyrosine/metabolism ; Precipitin Tests ; Protein-Tyrosine Kinases/metabolism ; Receptors, Antigen, B-Cell/immunology/*metabolism ; Receptors, Antigen, T-Cell/immunology/*metabolism ; *Signal Transduction ; T-Lymphocytes/immunology/metabolism ; Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 187
    Publikationsdatum: 2001-02-07
    Beschreibung: Most mammalian somatic cells are thought to have a limited proliferative capacity because they permanently stop dividing after a finite number of divisions in culture, a state termed replicative cell senescence. Here we show that most oligodendrocyte precursor cells purified from postnatal rat optic nerve can proliferate indefinitely in serum-free culture if prevented from differentiating; various cell cycle-inhibitory proteins increase, but the cells do not stop dividing. The cells maintain high telomerase activity and p53- and Rb-dependent cell cycle checkpoint responses, and serum or genotoxic drugs induce them to acquire a senescence-like phenotype. Our findings suggest that some normal rodent precursor cells have an unlimited proliferative capacity if cultured in conditions that avoid both differentiation and the activation of checkpoint responses that arrest the cell cycle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tang, D G -- Tokumoto, Y M -- Apperly, J A -- Lloyd, A C -- Raff, M C -- New York, N.Y. -- Science. 2001 Feb 2;291(5505):868-71. Epub 2001 Jan 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Laboratory for Molecular Cell Biology, University College London, London WC1E 6BT, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11157165" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Apoptosis ; *Cell Aging ; Cell Culture Techniques ; Cell Cycle ; Cell Differentiation ; *Cell Division ; Cells, Cultured ; Contact Inhibition ; Culture Media, Serum-Free ; Cyclin-Dependent Kinases/antagonists & inhibitors/metabolism ; Cyclins/metabolism ; Mutation ; Nucleic Acid Synthesis Inhibitors ; Oligodendroglia/*cytology/physiology ; Optic Nerve/cytology ; Proteins/metabolism ; Rats ; Retinoblastoma Protein/metabolism ; Stem Cells/*cytology/physiology ; Telomerase ; Tumor Suppressor Protein p14ARF ; Tumor Suppressor Protein p53/metabolism ; ras Proteins/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 188
    Publikationsdatum: 2001-07-07
    Beschreibung: The existence of a large number of receptors coupled to heterotrimeric guanine nucleotide binding proteins (G proteins) raises the question of how a particular receptor selectively regulates specific targets. We provide insight into this question by identifying a prototypical macromolecular signaling complex. The beta(2) adrenergic receptor was found to be directly associated with one of its ultimate effectors, the class C L-type calcium channel Ca(v)1.2. This complex also contained a G protein, an adenylyl cyclase, cyclic adenosine monophosphate-dependent protein kinase, and the counterbalancing phosphatase PP2A. Our electrophysiological recordings from hippocampal neurons demonstrate highly localized signal transduction from the receptor to the channel. The assembly of this signaling complex provides a mechanism that ensures specific and rapid signaling by a G protein-coupled receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davare, M A -- Avdonin, V -- Hall, D D -- Peden, E M -- Burette, A -- Weinberg, R J -- Horne, M C -- Hoshi, T -- Hell, J W -- AG00213/AG/NIA NIH HHS/ -- AG17502/AG/NIA NIH HHS/ -- GM08688/GM/NIGMS NIH HHS/ -- GM56900/GM/NIGMS NIH HHS/ -- HL61645/HL/NHLBI NIH HHS/ -- NS35563/NS/NINDS NIH HHS/ -- NS39444/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2001 Jul 6;293(5527):98-101.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of Wisconsin, Madison, WI 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11441182" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenylyl Cyclases/metabolism ; Adrenergic beta-2 Receptor Agonists ; Albuterol/pharmacology ; Animals ; Calcium Channels, L-Type/genetics/*metabolism ; Cell Line ; Cell Membrane/metabolism ; Cyclic AMP-Dependent Protein Kinases/metabolism ; Electric Conductivity ; Fluorescent Antibody Technique ; Heterotrimeric GTP-Binding Proteins/metabolism ; Humans ; Isoproterenol/pharmacology ; Kinetics ; Macromolecular Substances ; Neurons/cytology/drug effects/enzymology/metabolism ; Phosphoprotein Phosphatases/metabolism ; Precipitin Tests ; Prosencephalon/cytology/metabolism ; Protein Binding ; Pyramidal Cells/cytology/drug effects/enzymology/metabolism ; Rats ; Receptors, Adrenergic, beta-2/genetics/*metabolism ; *Signal Transduction ; Substrate Specificity
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 189
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-10-20
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J -- New York, N.Y. -- Science. 2001 Oct 19;294(5542):508-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11641483" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alzheimer Disease/*drug therapy/epidemiology/genetics/*metabolism ; Amyloid Precursor Protein Secretases ; Amyloid beta-Peptides/biosynthesis/blood/*metabolism ; Amyloid beta-Protein Precursor/metabolism ; Animals ; Anticholesteremic Agents/*therapeutic use ; Apolipoprotein E4 ; Apolipoproteins E/genetics ; Aspartic Acid Endopeptidases ; Brain/metabolism ; Cells, Cultured ; Cholesterol/blood/*metabolism/pharmacology ; Clinical Trials as Topic ; Endopeptidases/metabolism ; Humans ; Membrane Microdomains/metabolism ; Neurons/metabolism ; Pravastatin/therapeutic use ; Sterol O-Acyltransferase/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 190
    Publikationsdatum: 2001-02-27
    Beschreibung: The mammalian innate immune system retains from Drosophila a family of homologous Toll-like receptors (TLRs) that mediate responses to microbial ligands. Here, we show that TLR2 activation leads to killing of intracellular Mycobacterium tuberculosis in both mouse and human macrophages, through distinct mechanisms. In mouse macrophages, bacterial lipoprotein activation of TLR2 leads to a nitric oxide-dependent killing of intracellular tubercle bacilli, but in human monocytes and alveolar macrophages, this pathway was nitric oxide-independent. Thus, mammalian TLRs respond (as Drosophila Toll receptors do) to microbial ligands and also have the ability to activate antimicrobial effector pathways at the site of infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thoma-Uszynski, S -- Stenger, S -- Takeuchi, O -- Ochoa, M T -- Engele, M -- Sieling, P A -- Barnes, P F -- Rollinghoff, M -- Bolcskei, P L -- Wagner, M -- Akira, S -- Norgard, M V -- Belisle, J T -- Godowski, P J -- Bloom, B R -- Modlin, R L -- AI 07118/AI/NIAID NIH HHS/ -- AI 22553/AI/NIAID NIH HHS/ -- AI 47868/AI/NIAID NIH HHS/ -- AR 40312/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Feb 23;291(5508):1544-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Dermatology, Department of Microbiology and Immunology and Molecular Biology Institute, UCLA School of Medicine, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11222859" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Bacterial Proteins/immunology ; Cell Line ; Cells, Cultured ; *Drosophila Proteins ; Humans ; Interferon-gamma/immunology/pharmacology ; Ligands ; Lipoproteins/*immunology ; Macrophage Activation ; Macrophages/immunology/metabolism/*microbiology ; Macrophages, Alveolar/immunology/metabolism/microbiology ; Macrophages, Peritoneal/immunology/metabolism/microbiology ; Membrane Glycoproteins/*metabolism ; Mice ; Monocytes/immunology/metabolism/*microbiology ; Mycobacterium tuberculosis/growth & development/*immunology ; Nitric Oxide/*metabolism ; Nitric Oxide Synthase/antagonists & inhibitors/metabolism ; Nitric Oxide Synthase Type II ; Receptors, Cell Surface/*metabolism ; Signal Transduction ; Toll-Like Receptor 2 ; Toll-Like Receptors ; Tumor Necrosis Factor-alpha/immunology/pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 191
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-02-07
    Beschreibung: We describe a heptameric protein pore that has been engineered to accommodate two different cyclodextrin adapters simultaneously within the lumen of a transmembrane beta barrel. The volume between the adapters is a cavity of approximately 4400 cubic angstroms. Analysis of single-channel recordings reveals that individual charged organic molecules can be pulled into the cavity by an electrical potential. Once trapped, an organic molecule shuttles back and forth between the adapters for hundreds of milliseconds. Such self-assembling nanostructures are of interest for the fabrication of multianalyte sensors and could provide a means to control chemical reactions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gu, L Q -- Cheley, S -- Bayley, H -- New York, N.Y. -- Science. 2001 Jan 26;291(5504):636-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medical Biochemistry and Genetics, Texas A&M University System Health Science Center, College Station, TX 77843, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11158673" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adamantane/*analogs & derivatives/*chemistry/metabolism ; Bacterial Toxins/*chemistry/metabolism ; Binding Sites ; Cyclodextrins/*chemistry/metabolism ; Dicarboxylic Acids/*chemistry/metabolism ; Electric Conductivity ; Hemolysin Proteins/*chemistry/metabolism ; Kinetics ; Membrane Potentials ; Models, Molecular ; Mutagenesis, Site-Directed ; Protein Conformation ; *Protein Engineering ; Thermodynamics ; *beta-Cyclodextrins
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 192
    Publikationsdatum: 2001-02-07
    Beschreibung: Replicative senescence is thought to be an intrinsic mechanism for limiting the proliferative life-span of normal somatic cells. We show here that rat Schwann cells can be expanded indefinitely in culture while maintaining checkpoints normally lost during the immortalization process. These findings demonstrate that senescence is not an inevitable consequence of extended proliferation in culture.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mathon, N F -- Malcolm, D S -- Harrisingh, M C -- Cheng, L -- Lloyd, A C -- New York, N.Y. -- Science. 2001 Feb 2;291(5505):872-5. Epub 2001 Jan 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London WC1E 6BT, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11157166" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blood ; Carrier Proteins/metabolism ; *Cell Aging ; Cell Culture Techniques ; *Cell Division ; Cell Line ; Cell Size ; Cells, Cultured ; Clone Cells ; Culture Media ; Cyclin-Dependent Kinase Inhibitor p16 ; Cyclin-Dependent Kinases/metabolism ; Cyclins/metabolism ; Fibroblasts/cytology/physiology ; Giant Cells/cytology ; Mutation ; Phenotype ; Proteins/metabolism ; Rats ; Schwann Cells/*cytology/physiology ; Telomerase/metabolism ; Telomere/physiology ; Tumor Suppressor Protein p14ARF ; Tumor Suppressor Protein p53/metabolism ; beta-Galactosidase/metabolism ; ras Proteins/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 193
    Publikationsdatum: 2001-10-27
    Beschreibung: Single-molecule imaging techniques were used to reveal the binding of individual cyclic adenosine 3',5'-monophosphate molecules to heterotrimeric guanine nucleotide-binding protein coupled receptors on the surface of living Dictyostelium discoideum cells. The binding sites were uniformly distributed and diffused rapidly in the plane of the membrane. The probabilities of individual association and dissociation events were greater for receptors at the anterior end of the cell. Agonist-induced receptor phosphorylation had little effect on any of the monitored properties, whereas G protein coupling influenced the binding kinetics. These observations illustrate the dynamic properties of receptors involved in gradient sensing and suggest that these may be polarized in chemotactic cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ueda, M -- Sako, Y -- Tanaka, T -- Devreotes, P -- Yanagida, T -- New York, N.Y. -- Science. 2001 Oct 26;294(5543):864-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Recognition and Formation, Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Corporation (JST)., Osaka 562-0035, Japan. ueda@phys1.med.osaka-u.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11679673" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Carbocyanines/metabolism ; Cell Membrane/metabolism ; *Chemotaxis ; Cyclic AMP/*metabolism ; Dictyostelium/cytology/genetics/metabolism/*physiology ; Diffusion ; Guanosine Diphosphate/pharmacology ; Guanosine Triphosphate/pharmacology ; Heterotrimeric GTP-Binding Proteins/genetics/*metabolism ; Kinetics ; Microscopy, Fluorescence ; Mutation ; Phosphorylation ; Pseudopodia/metabolism ; Receptors, Cyclic AMP/*metabolism ; *Signal Transduction
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 194
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-03-03
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Service, R F -- New York, N.Y. -- Science. 2001 Jan 19;291(5503):426-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11228134" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alzheimer Disease/*etiology/metabolism ; Amyloid beta-Peptides/chemistry/*metabolism/pharmacology ; Animals ; Antioxidants/pharmacology ; Caenorhabditis elegans ; Cells, Cultured ; Computing Methodologies ; Electrochemistry ; Electrodes ; *Free Radicals ; Humans ; Methionine/chemistry/*metabolism ; Neurons/cytology/drug effects ; Rats ; Societies, Scientific ; Vitamin E/pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 195
    Publikationsdatum: 2001-10-13
    Beschreibung: Increases in the intracellular concentration of calcium ([Ca2+]i) activate various signaling pathways that lead to the expression of genes that are essential for dendritic development, neuronal survival, and synaptic plasticity. The mode of Ca2+ entry into a neuron plays a key role in determining which signaling pathways are activated and thus specifies the cellular response to Ca2+. Ca2+ influx through L-type voltage-activated channels (LTCs) is particularly effective at activating transcription factors such as CREB and MEF-2. We developed a functional knock-in technique to investigate the features of LTCs that specifically couple them to the signaling pathways that regulate gene expression. We found that an isoleucine-glutamine ("IQ") motif in the carboxyl terminus of the LTC that binds Ca2+-calmodulin (CaM) is critical for conveying the Ca2+ signal to the nucleus. Ca2+-CaM binding to the LTC was necessary for activation of the Ras/mitogen-activated protein kinase (MAPK) pathway, which conveys local Ca2+ signals from the mouth of the LTC to the nucleus. CaM functions as a local Ca2+ sensor at the mouth of the LTC that activates the MAPK pathway and leads to the stimulation of genes that are essential for neuronal survival and plasticity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dolmetsch, R E -- Pajvani, U -- Fife, K -- Spotts, J M -- Greenberg, M E -- NS28829/NS/NINDS NIH HHS/ -- P30-HD18655/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2001 Oct 12;294(5541):333-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neuroscience, Children's Hospital and Department of Neurobiology, Harvard Medical School, Enders Pediatric Research Laboratories, Room 260, 300 Longwood Avenue, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11598293" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Calcium/*metabolism ; Calcium Channels, L-Type/chemistry/genetics/*metabolism ; Calcium Signaling ; Calmodulin/*metabolism ; Cell Membrane/metabolism ; Cell Nucleus/*metabolism ; Cells, Cultured ; Cerebral Cortex/cytology ; Cyclic AMP Response Element-Binding Protein/metabolism ; DNA-Binding Proteins/metabolism ; Enzyme Activation ; Gene Expression Regulation ; *MAP Kinase Signaling System ; MEF2 Transcription Factors ; Mitogen-Activated Protein Kinases/metabolism ; Molecular Sequence Data ; Mutation ; Myogenic Regulatory Factors ; Neurons/*metabolism ; Phosphorylation ; Phosphoserine/metabolism ; Protein Structure, Tertiary ; Rats ; Rats, Long-Evans ; Transcription Factors/metabolism ; Transcription, Genetic ; Transfection
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 196
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-01-06
    Beschreibung: Neurons encode information and communicate via action potentials, which are generated following the summation of synaptic events. It is commonly assumed that action potentials reset the membrane potential completely, allowing another round of synaptic integration to begin. We show here that the conductances underlying the action potential act instead as a variable reset of synaptic integration. The strength of this reset is cell type-specific and depends on the kinetics, location, and timing of the synaptic input. As a consequence, distal synapses, as well as inputs mediated by N-methyl-d-aspartate receptor activation, can contribute disproportionately to synaptic integration during action potential firing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hausser, M -- Major, G -- Stuart, G J -- New York, N.Y. -- Science. 2001 Jan 5;291(5501):138-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University College London, Gower Street, London WC1E 6BT, UK. m.hausser@ucl.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11141567" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Action Potentials/drug effects ; Animals ; Computer Simulation ; Dendrites/drug effects/physiology ; Electric Stimulation ; *Excitatory Postsynaptic Potentials/drug effects ; Kinetics ; Magnesium/pharmacology ; Models, Neurological ; Neocortex/cytology/physiology ; Patch-Clamp Techniques ; Purkinje Cells/*physiology ; Pyramidal Cells/*physiology ; Rats ; Receptors, AMPA/physiology ; Receptors, N-Methyl-D-Aspartate/physiology ; Synapses/physiology ; *Synaptic Transmission ; Tetrodotoxin/pharmacology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 197
    Publikationsdatum: 2001-04-28
    Beschreibung: Here we use mechanical force to induce the unfolding and refolding of single RNA molecules: a simple RNA hairpin, a molecule containing a three-helix junction, and the P5abc domain of the Tetrahymena thermophila ribozyme. All three molecules (P5abc only in the absence of Mg2+) can be mechanically unfolded at equilibrium, and when kept at constant force within a critical force range, are bi-stable and hop between folded and unfolded states. We determine the force-dependent equilibrium constants for folding/unfolding these single RNA molecules and the positions of their transition states along the reaction coordinate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liphardt, J -- Onoa, B -- Smith, S B -- Tinoco, I Jr -- Bustamante, C -- GM-10840/GM/NIGMS NIH HHS/ -- GM-32543/GM/NIGMS NIH HHS/ -- R01 GM010840/GM/NIGMS NIH HHS/ -- R01 GM010840-42/GM/NIGMS NIH HHS/ -- R01 GM010840-43/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Apr 27;292(5517):733-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Howard Hughes Medical Institute, University of California, Berkeley, CA 94720, USA. jliphard@alice.berkeley.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11326101" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Base Sequence ; Edetic Acid ; Kinetics ; Magnesium ; Microspheres ; Molecular Sequence Data ; *Nucleic Acid Conformation ; Polystyrenes ; RNA/*chemistry ; RNA Stability ; RNA, Catalytic/*chemistry ; Stress, Mechanical ; Tetrahymena thermophila ; Thermodynamics
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 198
    Publikationsdatum: 2001-12-12
    Beschreibung: Calcium (Ca2+) influx through Ca2+-permeable ion channels plays a pivotal role in a variety of neuronal signaling processes, and negative-feedback control of this influx by Ca2+ itself is often equally important for modulation of such signaling. Negative modulation by Ca2+ through calmodulin (CaM) on cyclic nucleotide-gated (CNG) channels underlies the adaptation of olfactory receptor neurons to odorants. We show that this feedback requires two additional subunits of the native olfactory channel, CNGA4 and CNGB1b, even though the machinery for CaM binding and modulation is present in the principal subunit CNGA2. This provides a rationale for the presence of three distinct subunits in the native olfactory channel and underscores the subtle link between the molecular make-up of an ion channel and the physiological function it subserves.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bradley, J -- Reuter, D -- Frings, S -- New York, N.Y. -- Science. 2001 Dec 7;294(5549):2176-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut fur Biologische Informationsverarbeitung, Forschungszentrum Julich, 52425 Julich, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11739960" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Adaptation, Physiological ; Animals ; Calcium/metabolism/pharmacology ; Calcium Signaling ; Calmodulin/*metabolism/pharmacology ; Cell Line ; Cyclic AMP/*metabolism ; Cyclic Nucleotide-Gated Cation Channels ; Feedback, Physiological ; Humans ; Ion Channel Gating ; Ion Channels/metabolism/*physiology ; Kinetics ; *Odors ; Olfactory Receptor Neurons/*physiology ; Patch-Clamp Techniques ; Photolysis ; Protein Subunits ; Rats ; Recombinant Proteins/metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 199
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-09-15
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Duffy, P E -- Fried, M -- New York, N.Y. -- Science. 2001 Sep 14;293(5537):2009-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Seattle Biomedical Research Institute, Seattle, WA 98109, USA. pduffy@sbri.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11557864" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antibodies, Protozoan/immunology ; Cell Adhesion ; Chondroitin Sulfates/metabolism ; Erythrocytes/metabolism/*parasitology ; Female ; Humans ; Hyaluronic Acid/metabolism ; Immunoglobulin G/immunology/*metabolism ; Malaria Vaccines ; Malaria, Falciparum/immunology/*parasitology/prevention & control ; Placenta/metabolism/parasitology ; Placenta Diseases/immunology/parasitology ; Plasmodium falciparum/immunology ; Pregnancy ; Pregnancy Complications, Parasitic/immunology/*parasitology/prevention & control ; Protein Structure, Tertiary ; Protozoan Proteins/chemistry/immunology/*metabolism ; Receptors, Fc/*metabolism ; Trophoblasts/immunology/metabolism/parasitology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 200
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 2001-03-17
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dwyer, D S -- New York, N.Y. -- Science. 2001 Jan 12;291(5502):252-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11253208" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Base Sequence ; DNA/*genetics ; *DNA Transposable Elements ; *Evolution, Molecular ; *Exons ; Genes ; Interspersed Repetitive Sequences ; Protein Structure, Secondary ; Proteins/chemistry/genetics ; Rickettsia conorii/genetics
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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