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  • American Association for the Advancement of Science (AAAS)  (5,042)
  • 201
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    A role for CD40 expression on CD8+ T cells in the generation of CD8+ T cell memory (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-09-21
    Description: The delivery of CD4 help to CD8+ T cell responses requires interactions between CD40 and CD40 ligand and is thought to occur through antigen-presenting cell (APC) activation. Here we show that generation of memory CD8+ T cells displaying an enhanced capacity for cell division and cytokine secretion required CD4 help but not CD40 expression by the APCs. Activated CD4+ and CD8+ T cells expressed CD40; and in the absence of this protein, CD8+ T cells were unable to differentiate into memory cells or receive CD4 help. These results suggest that, like B cells, CD8+ T cells receive CD4 help directly through CD40 and that this interaction is fundamental for CD8+ T cell memory generation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bourgeois, Christine -- Rocha, Benedita -- Tanchot, Corinne -- New York, N.Y. -- Science. 2002 Sep 20;297(5589):2060-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉INSERM U345, Institut Necker, 156 Rue de Vaugirard, F-75730 Paris Cedex 15, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12242444" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen Presentation ; Antigen-Presenting Cells/immunology ; Antigens/immunology ; Antigens, CD40/genetics/*immunology/*metabolism ; CD4-Positive T-Lymphocytes/immunology ; CD40 Ligand/metabolism ; CD8-Positive T-Lymphocytes/cytology/*immunology/metabolism ; Cell Differentiation ; Cell Division ; Female ; *Immunologic Memory ; Interferon-gamma/secretion ; Interleukin-2/secretion ; Lymphocyte Activation ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; RNA, Messenger/genetics/metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; T-Lymphocyte Subsets/cytology/*immunology/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 202
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    NASA decision not suited for women (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-03-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lawler, Andrew -- New York, N.Y. -- Science. 2002 Mar 1;295(5560):1623.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11872810" target="_blank"〉PubMed〈/a〉
    Keywords: Body Constitution ; Budgets ; Equipment Design ; Female ; Humans ; Male ; *Sex Characteristics ; *Space Flight ; *Space Suits ; United States ; *United States National Aeronautics and Space Administration/economics ; Weightlessness
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 203
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    Induction of cachexia in mice by systemically administered myostatin (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-05-25
    Description: Mice and cattle with genetic deficiencies in myostatin exhibit dramatic increases in skeletal muscle mass, suggesting that myostatin normally suppresses muscle growth. Whether this increased muscling results from prenatal or postnatal lack of myostatin activity is unknown. Here we show that myostatin circulates in the blood of adult mice in a latent form that can be activated by acid treatment. Systemic overexpression of myostatin in adult mice was found to induce profound muscle and fat loss analogous to that seen in human cachexia syndromes. These data indicate that myostatin acts systemically in adult animals and may be a useful pharmacologic target in clinical settings such as cachexia, where muscle growth is desired.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zimmers, Teresa A -- Davies, Monique V -- Koniaris, Leonidas G -- Haynes, Paul -- Esquela, Aurora F -- Tomkinson, Kathy N -- McPherron, Alexandra C -- Wolfman, Neil M -- Lee, Se-Jin -- 5 T32 CA09139/CA/NCI NIH HHS/ -- R01 CA88866/CA/NCI NIH HHS/ -- R01 HD35887/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2002 May 24;296(5572):1486-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology and Genetics, Johns Hopkins School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12029139" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Activins/administration & dosage/pharmacology ; Adipose Tissue/anatomy & histology/pathology ; Animals ; Body Weight ; CHO Cells ; Cachexia/*etiology/metabolism/pathology ; Cricetinae ; Eating ; Female ; Follistatin ; Liver/anatomy & histology/pathology ; Mice ; Mice, Nude ; Muscle Fibers, Skeletal/cytology/pathology ; Muscle, Skeletal/*anatomy & histology/pathology ; Myostatin ; Organ Size ; Peptide Fragments/administration & dosage/pharmacology ; Recombinant Proteins/administration & dosage ; Transforming Growth Factor beta/administration & dosage/blood/*physiology ; Wasting Syndrome/etiology/metabolism/pathology ; Weight Loss
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 204
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    Premature aging in mice deficient in DNA repair and transcription (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-16
    Description: One of the factors postulated to drive the aging process is the accumulation of DNA damage. Here, we provide strong support for this hypothesis by describing studies of mice with a mutation in XPD, a gene encoding a DNA helicase that functions in both repair and transcription and that is mutated in the human disorder trichothiodystrophy (TTD). TTD mice were found to exhibit many symptoms of premature aging, including osteoporosis and kyphosis, osteosclerosis, early greying, cachexia, infertility, and reduced life-span. TTD mice carrying an additional mutation in XPA, which enhances the DNA repair defect, showed a greatly accelerated aging phenotype, which correlated with an increased cellular sensitivity to oxidative DNA damage. We hypothesize that aging in TTD mice is caused by unrepaired DNA damage that compromises transcription, leading to functional inactivation of critical genes and enhanced apoptosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉de Boer, Jan -- Andressoo, Jaan Olle -- de Wit, Jan -- Huijmans, Jan -- Beems, Rudolph B -- van Steeg, Harry -- Weeda, Geert -- van der Horst, Gijsbertus T J -- van Leeuwen, Wibeke -- Themmen, Axel P N -- Meradji, Morteza -- Hoeijmakers, Jan H J -- AG 17242-02/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2002 May 17;296(5571):1276-9. Epub 2002 Apr 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Genetics Center, Department of Cell Biology and Genetics, Center for Biomedical Genetics, Erasmus University, 3000 DR Rotterdam, Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11950998" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Aging, Premature/*etiology ; Animals ; Apoptosis ; Bone Density ; Cachexia/etiology ; Crosses, Genetic ; *DNA Damage ; DNA Helicases/genetics/*physiology ; *DNA Repair ; DNA-Binding Proteins/genetics/physiology ; Female ; Fertility ; Gene Targeting ; Growth Disorders/etiology/genetics ; Hair Diseases/genetics ; Kyphosis/etiology/genetics/pathology ; Male ; Mice ; Mutation ; Oxidative Stress ; Phenotype ; Point Mutation ; Proteins/genetics/*physiology ; RNA-Binding Proteins/genetics/physiology ; *Transcription Factors ; Transcription, Genetic ; Xeroderma Pigmentosum Group A Protein ; Xeroderma Pigmentosum Group D Protein
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 205
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    Mantophasmatodea: a new insect order? (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-08-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tilgner, Erich -- New York, N.Y. -- Science. 2002 Aug 2;297(5582):731; discussion 731.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Fernback Science Center, 156 Heaton Park Drive, Atlanta, GA 30307, USA. phasmida@msn.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12161616" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; *Fossils ; Insects/anatomy & histology/*classification ; Models, Biological ; Orthoptera/anatomy & histology/*classification ; Phylogeny ; Reproducibility of Results
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 206
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    Infectious disease. New culprit emerges in river blindness (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-03-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, Elizabeth -- New York, N.Y. -- Science. 2002 Mar 8;295(5561):1809-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11884722" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/therapeutic use ; Blindness/etiology ; Eye/immunology/parasitology/*pathology ; Female ; Helminth Proteins/physiology ; Humans ; Keratitis ; Mice ; Microfilaria/immunology/physiology ; Onchocerca volvulus/growth & development/immunology/*microbiology/pathogenicity ; Onchocerciasis, Ocular/drug therapy/*immunology/*microbiology/parasitology ; Wolbachia/immunology/*pathogenicity/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 207
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    Conservation science. Caribou study fuels debate on drilling in Arctic Refuge (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaiser, Jocelyn -- New York, N.Y. -- Science. 2002 Apr 19;296(5567):444-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11964445" target="_blank"〉PubMed〈/a〉
    Keywords: Alaska ; Animals ; Arctic Regions ; Behavior, Animal ; *Conservation of Natural Resources ; *Ecosystem ; Environment ; Female ; *Petroleum ; Public Policy ; *Reindeer/physiology ; Reproduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 208
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    Evolutionary biology. Finches adapt rapidly to new homes (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-01-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, Elizabeth -- New York, N.Y. -- Science. 2002 Jan 11;295(5553):249-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11786614" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptation, Physiological ; Alabama ; Animals ; *Biological Evolution ; Ecosystem ; Environment ; Female ; Male ; Montana ; Oviposition ; *Reproduction ; *Sex Characteristics ; Songbirds/anatomy & histology/growth & development/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 209
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    Public information and breeding habitat selection in a wild bird population (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-08-17
    Description: According to the "public information" hypothesis, some animal species may monitor the current reproductive success of conspecifics to assess local habitat quality and to choose their own subsequent breeding site. To test this hypothesis experimentally, we manipulated two components of public information, the mean number of offspring raised locally ("quantity") and their condition ("quality"), in the collared flycatcher Ficedula albicollis. Immigration rate decreased with local offspring quantity but did not depend on local offspring quality, suggesting that immigrants are deprived of information regarding local quality. Conversely, emigration rate increased both when local offspring quantity or quality decreased, suggesting that residents can use both components of public information.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Doligez, Blandine -- Danchin, Etienne -- Clobert, Jean -- New York, N.Y. -- Science. 2002 Aug 16;297(5584):1168-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire d'Ecologie CNRS-UMR 7625, Universite Pierre et Marie Curie, 7 quai Saint Bernard, Batiment A 7eme etage, Case 237, F-75252 Paris Cedex 05, France. blandine.doligez@esh.unibe.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12183627" target="_blank"〉PubMed〈/a〉
    Keywords: *Animal Migration ; Animals ; Animals, Wild/physiology ; *Behavior, Animal ; Cognition ; Cues ; *Environment ; Female ; Male ; *Nesting Behavior ; Probability ; *Reproduction ; Songbirds/*physiology ; Sweden
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 210
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    Direct link between mhc polymorphism, T cell avidity, and diversity in immune defense (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-12-03
    Description: Major histocompatibility complex (mhc)-encoded molecules govern immune responses by presenting antigenic peptides to T cells. The extensive polymorphism of genes encoding these molecules is believed to enhance immune defense by broadening the array of antigenic peptides available for T cell recognition, but direct evidence supporting the importance of this mechanism in combating pathogens is limited. Here we link mhc polymorphism-driven diversification of the cytotoxic T lymphocyte (CTL) repertoire to the generation of high-avidity, protective antiviral T cells and to superior antiviral defense. Thus, much of the beneficial effect of the mhc polymorphism in immune defense may be due to its critical influence on the properties of the selected CTL repertoire.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Messaoudi, Ilhem -- Guevara Patino, Jose A -- Dyall, Ruben -- LeMaoult, Joel -- Nikolich-Zugich, Janko -- CA-86803/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2002 Nov 29;298(5599):1797-800.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Vaccine and Gene Therapy Institute and the Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12459592" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Animals ; Complementarity Determining Regions ; Cytotoxicity, Immunologic ; Female ; *Genes, MHC Class I ; H-2 Antigens/genetics/*immunology ; Herpes Simplex/*immunology ; Herpesvirus 1, Human/*immunology ; Immunity, Innate ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Inbred Strains ; *Polymorphism, Genetic ; Receptors, Antigen, T-Cell, alpha-beta/immunology ; T-Lymphocytes, Cytotoxic/*immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 211
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    Evidence for the effect of learning on timing of reproduction in blue tits (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-06
    Description: We experimentally show that in blue tits (Parus caeruleus) egg-laying date is causally linked to experience in the previous year. Females that received additional food in the nestling period in one year laid eggs later in the next year compared with the control birds, whatever the degree of synchronization with the natural food abundance in the previous year. As a result, they raised their brood much later than the peak period of nestling food availability in the next year. The response to experience is adaptive for blue tits, which live in heterogeneous habitats where the peak period of food varies, but once settled will breed at the same location for life.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grieco, Fabrizio -- van Noordwijk, Arie J -- Visser, Marcel E -- New York, N.Y. -- Science. 2002 Apr 5;296(5565):136-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Netherlands Institute of Ecology, Center for Terrestrial Ecology, Post Office Box 40, 6666 ZG Heteren, Netherlands. grieco@cto.nioo.knaw.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11935025" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Animals ; *Behavior, Animal ; Cues ; Environment ; Female ; *Food ; *Learning ; Male ; *Oviposition ; *Reproduction ; Songbirds/*physiology ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 212
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    Truncating neurotrypsin mutation in autosomal recessive nonsyndromic mental retardation (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-12-03
    Description: A 4-base pair deletion in the neuronal serine protease neurotrypsin gene was associated with autosomal recessive nonsyndromic mental retardation (MR). In situ hybridization experiments on human fetal brains showed that neurotrypsin was highly expressed in brain structures involved in learning and memory. Immuno-electron microscopy on adult human brain sections revealed that neurotrypsin is located in presynaptic nerve endings, particularly over the presynaptic membrane lining the synaptic cleft. These findings suggest that neurotrypsin-mediated proteolysis is required for normal synaptic function and suggest potential insights into the pathophysiological bases of mental retardation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Molinari, Florence -- Rio, Marlene -- Meskenaite, Virginia -- Encha-Razavi, Ferechte -- Auge, Joelle -- Bacq, Delphine -- Briault, Sylvain -- Vekemans, Michel -- Munnich, Arnold -- Attie-Bitach, Tania -- Sonderegger, Peter -- Colleaux, Laurence -- New York, N.Y. -- Science. 2002 Nov 29;298(5599):1779-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Unite de Recherches sur les Handicaps Genetiques de l'Enfant, INSERM U-393, et Departement de Genetique, Hopital Necker-Enfants Malades, Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12459588" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Brain/embryology/*metabolism ; Female ; Fetus/metabolism ; Gene Expression ; Genes, Recessive ; Humans ; Immunohistochemistry ; Intellectual Disability/*genetics/metabolism ; Male ; Microsatellite Repeats ; Microscopy, Immunoelectron ; Pedigree ; *Sequence Deletion ; Serine Endopeptidases/chemistry/*genetics/metabolism ; Spinal Cord/embryology/metabolism ; Synapses/*metabolism/ultrastructure ; Synaptic Membranes/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 213
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    Fluorescent signaling in parrots (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-01-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arnold, Kathryn E -- Owens, Ian P F -- Marshall, N Justin -- New York, N.Y. -- Science. 2002 Jan 4;295(5552):92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Environmental and Evolutionary Biology, University of Glasgow, Glasgow G12 8QQ, UK. K.Arnold@bio.gla.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11778040" target="_blank"〉PubMed〈/a〉
    Keywords: *Animal Communication ; Animals ; *Feathers ; Female ; *Fluorescence ; Male ; Parrots/*physiology ; Pigments, Biological/*physiology ; *Sexual Behavior, Animal ; Ultraviolet Rays
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 214
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    The mosquito genome--a breakthrough for public health (2002)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2002-10-05
    Description: The Anopheles gambiae genome sequence will accelerate identification of new insect vector target genes leading to improved strategies for malaria control.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morel, Carlos M -- Toure, Yeya T -- Dobrokhotov, Boris -- Oduola, Ayoade M J -- New York, N.Y. -- Science. 2002 Oct 4;298(5591):79.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Special Programme for Research and Training in Tropical Diseases (TDR), World Health Organization, 20 Avenue Appia, CH-1211 Geneva 27, Switzerland. tdr@who.int〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12364774" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anopheles/*genetics/parasitology/physiology ; Female ; *Genes, Insect ; Genetic Engineering ; *Genome ; Humans ; Insect Vectors/*genetics/parasitology/physiology ; Malaria/parasitology/*prevention & control/transmission ; Male ; Mosquito Control ; Plasmodium/physiology ; Public Health ; *Sequence Analysis, DNA
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 215
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    Animal behavior. Guppy sex and gluttony guided by orange glow (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-03-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morell, Virginia -- New York, N.Y. -- Science. 2002 Mar 8;295(5561):1816.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11884728" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carotenoids/analysis ; Color ; *Feeding Behavior ; Female ; *Food Preferences ; Fruit/chemistry ; Genes ; Male ; *Pigmentation ; Poecilia/anatomy & histology/genetics/*physiology ; *Sexual Behavior, Animal
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 216
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    Nobel women (2002)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2002-01-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wade, David -- New York, N.Y. -- Science. 2002 Jan 18;295(5554):439.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11799998" target="_blank"〉PubMed〈/a〉
    Keywords: Female ; Humans ; *Nobel Prize ; *Women
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    Humility in observational studies (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-10-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shelton, James D -- New York, N.Y. -- Science. 2002 Sep 27;297(5590):2208.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12353520" target="_blank"〉PubMed〈/a〉
    Keywords: *Epidemiologic Studies ; *Estrogen Replacement Therapy/adverse effects ; Female ; Humans ; *Research Design ; *Selection Bias
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    Sperm-female coevolution in Drosophila (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-11-09
    Description: Rapid evolution of reproductive traits has been attributed to sexual selection arising from interaction between the sexes. However, little is known about the nature of selection driving the evolution of interacting sex-specific phenotypes. Using populations of Drosophila melanogaster selected for divergent sperm length or female sperm-storage organ length, we experimentally show that male fertilization success is determined by an interaction between sperm and female morphology. In addition, sperm length evolution occurred as a correlated response to selection on the female reproductive tract. Giant sperm tails are the cellular equivalent of the peacock's tail, having evolved because females evolved reproductive tracts that selectively bias paternity in favor of males with longer sperm.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, Gary T -- Pitnick, Scott -- New York, N.Y. -- Science. 2002 Nov 8;298(5596):1230-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Syracuse University, 108 College Place, Syracuse, NY 13244, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12424377" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Copulation ; Drosophila melanogaster/*anatomy & histology/genetics/*physiology ; Female ; Fertilization ; Genitalia, Female/anatomy & histology/physiology ; Linkage Disequilibrium ; Male ; Selection, Genetic ; Sexual Behavior, Animal ; Sperm Tail/ultrastructure ; Spermatozoa/*cytology/physiology
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    Natural iron isotope variations in human blood (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-03-16
    Description: Isotopic analysis of human blood and liver and muscle tissue indicates that each individual bears a long-term iron (Fe) isotope signature in the blood. Blood and tissue differ slightly in isotopic composition and are depleted by up to 2.6 per mil in 56Fe relative to 54Fe when compared to dietary Fe. The 56Fe/54Fe isotope ratio in the blood of males is, on average, lower by 0.3 per mil than that of females. These results suggest that Fe isotope effects in the blood reflect differences in intestinal Fe absorption between individuals and genotypes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walczyk, Thomas -- von Blanckenburg, Friedhelm -- New York, N.Y. -- Science. 2002 Mar 15;295(5562):2065-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Human Nutrition, Institute of Food Sciences, Swiss Federal Institute of Technology (ETH) Zurich, Seestrasse 72, CH-8803 Ruschlikon, Switzerland. thomas.walczyk@ilw.agrl.ethz.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11896276" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animals ; Child ; Female ; Food Analysis ; Humans ; Infant ; Intestinal Absorption ; Iron/*blood/metabolism ; Iron Isotopes/*blood/metabolism ; Iron, Dietary/administration & dosage/*metabolism ; Liver/metabolism ; Male ; Meat ; Muscles/metabolism ; Reference Values ; Sex Characteristics
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    Generation of live young from xenografted mouse ovaries (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-09-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Snow, Melanie -- Cox, Shae-Lee -- Jenkin, Graham -- Trounson, Alan -- Shaw, Jillian -- New York, N.Y. -- Science. 2002 Sep 27;297(5590):2227.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, Monash University, Victoria, Australia, 3800.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12351780" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Embryo Loss ; Embryo Transfer ; Embryonic and Fetal Development ; Female ; Fertility ; Fertilization in Vitro ; Gonadotropins, Equine/administration & dosage ; Male ; Mice ; Mice, Inbred Strains ; Mice, Nude ; Oocytes/*physiology ; Ovariectomy ; Ovary/*transplantation ; Pregnancy ; Pregnancy Outcome ; Rats ; *Reproductive Techniques, Assisted ; *Transplantation, Heterologous
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    Toxicology. Questions swirl over knockout gas used in hostage crisis (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-11-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enserink, Martin -- Stone, Richard -- New York, N.Y. -- Science. 2002 Nov 8;298(5596):1150-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12424343" target="_blank"〉PubMed〈/a〉
    Keywords: Etorphine ; Female ; Fentanyl/*analogs & derivatives/poisoning ; Halothane ; Humans ; Male ; Narcotics/*poisoning ; *Prisoners ; Russia ; *Terrorism ; Tranquilizing Agents
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    The many selves of social insects (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-16
    Description: Social insects show multiple levels of self identity. Most individuals are sterile workers who selflessly labor for their colony, which is often viewed as a superorganism. The superorganism protects itself with colony recognition systems based on learned odors, typically cuticular hydrocarbons. Transfer of these odors within the colony obscures separate clan identities. Residual individual interests do appear to cause conflicts within colonies over sex ratio, male production, caste, and reproductive dominance. However, genomic imprinting theory predicts that the individual's maternal and paternal genes will evolve separate infraorganismal identities, perhaps leaving virtually no coherent individual identity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Queller, David C -- Strassmann, Joan E -- New York, N.Y. -- Science. 2002 Apr 12;296(5566):311-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolutionary Biology, Mail Stop-170, Rice University, Post Office Box 1892, Houston, TX 77251-1892, USA. Queller@rice.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11951035" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Behavior, Animal ; Biological Evolution ; Conflict (Psychology) ; Cooperative Behavior ; Cues ; Female ; Genes, Insect ; Genomic Imprinting ; Hymenoptera/genetics/*physiology ; Insects/genetics/*physiology ; Male ; Odors ; Reproduction ; Selection, Genetic ; Sex Ratio ; Social Behavior
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    Intra- and interspecific variation in primate gene expression patterns (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-16
    Description: Although humans and their closest evolutionary relatives, the chimpanzees, are 98.7% identical in their genomic DNA sequences, they differ in many morphological, behavioral, and cognitive aspects. The underlying genetic basis of many of these differences may be altered gene expression. We have compared the transcriptome in blood leukocytes, liver, and brain of humans, chimpanzees, orangutans, and macaques using microarrays, as well as protein expression patterns of humans and chimpanzees using two-dimensional gel electrophoresis. We also studied three mouse species that are approximately as related to each other as are humans, chimpanzees, and orangutans. We identified species-specific gene expression patterns indicating that changes in protein and gene expression have been particularly pronounced in the human brain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enard, Wolfgang -- Khaitovich, Philipp -- Klose, Joachim -- Zollner, Sebastian -- Heissig, Florian -- Giavalisco, Patrick -- Nieselt-Struwe, Kay -- Muchmore, Elaine -- Varki, Ajit -- Ravid, Rivka -- Doxiadis, Gaby M -- Bontrop, Ronald E -- Paabo, Svante -- New York, N.Y. -- Science. 2002 Apr 12;296(5566):340-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institute for Evolutionary Anthropology, Inselstrasse 22, D-04103 Leipzig, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11951044" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Brain/*metabolism ; DNA, Complementary ; Female ; *Gene Expression ; Gene Expression Profiling ; Haplorhini/*genetics ; Hominidae/genetics ; Humans ; Leukocytes/*metabolism ; Liver/*metabolism ; Macaca mulatta/genetics ; Male ; Mice ; Muridae/genetics ; Oligonucleotide Array Sequence Analysis ; Organ Specificity ; Pan troglodytes/genetics ; Pongo pygmaeus/genetics ; Proteins/genetics/metabolism ; RNA, Messenger/genetics/metabolism ; Species Specificity
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    Interaction of short-range repressors with Drosophila CtBP in the embryo (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-04-29
    Description: Human CtBP attenuates transcriptional activation and tumorigenesis mediated by the adenovirus E1A protein. The E1A sequence motif that interacts with CtBP, Pro-X-Asp-Leu-Ser-X-Lys (P-DLS-K), is present in the repression domains of two unrelated short-range repressors in Drosophila, Knirps and Snail, and is essential for the interaction of these proteins with Drosophila CtBP (dCtBP). A P-element-induced mutation in dCtBP exhibits gene-dosage interactions with a null mutation in knirps, which is consistent with the occurrence of Knirps-dCtBP interactions in vivo. These observations suggest that CtBP and dCtBP are engaged in an evolutionarily conserved mechanism of transcriptional repression, which is used in both Drosophila and mammals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nibu, Y -- Zhang, H -- Levine, M -- GM46638/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1998 Apr 3;280(5360):101-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Biology, Division of Genetics, 401 Barker Hall, University of California, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9525852" target="_blank"〉PubMed〈/a〉
    Keywords: Alcohol Oxidoreductases ; Amino Acid Sequence ; Animals ; Animals, Genetically Modified ; Cell Nucleus/metabolism ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; Drosophila/*embryology/genetics/metabolism ; *Drosophila Proteins ; Embryo, Nonmammalian/metabolism ; Female ; Gene Dosage ; *Gene Expression Regulation ; Genes, Insect ; Genes, Reporter ; Humans ; Insect Proteins/genetics/metabolism ; Male ; Molecular Sequence Data ; Mutation ; Phosphoproteins/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Repressor Proteins/chemistry/genetics/*metabolism ; *Transcription Factors ; *Transcription, Genetic
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    The future of long life (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-10-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gavrilov, L A -- Gavrilova, N S -- New York, N.Y. -- Science. 1998 Sep 11;281(5383):1611-2; author reply 1613-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9767024" target="_blank"〉PubMed〈/a〉
    Keywords: Female ; Forecasting ; Humans ; Life Expectancy/*trends ; *Longevity ; Male ; *Mortality/trends ; United States
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    Year of the cat--in more ways than one (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-07-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Garber, K -- New York, N.Y. -- Science. 1998 Jun 19;280(5371):1841.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9669935" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats/*genetics ; *Chromosome Mapping ; Crosses, Genetic ; Disease Models, Animal ; Female ; Genetic Diseases, Inborn/genetics ; *Genome ; Humans ; Male ; Microsatellite Repeats
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    A blow to the 'grandmother theory' (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-05-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gibbons, A -- New York, N.Y. -- Science. 1998 Apr 24;280(5363):516.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9575094" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; Humans ; Life Expectancy ; Lions/*physiology ; *Longevity ; Menopause ; Papio/*physiology ; *Reproduction
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    alpha-Synuclein gene and Parkinson's disease. The French Parkinson's Disease Study Group (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-03-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1998 Feb 20;279(5354):1116-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9508681" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Chromosomes, Human, Pair 4 ; Female ; France ; Genes, Dominant ; Humans ; Italy ; Male ; Middle Aged ; Mutation ; Nerve Tissue Proteins/*genetics ; Parkinson Disease/*genetics ; Synucleins ; alpha-Synuclein
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    Multiplying knowledge of cell division, plant growth (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-10-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Normile, D -- New York, N.Y. -- Science. 1998 Sep 11;281(5383):1591,1593.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9767022" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arabidopsis/cytology/genetics/*growth & development ; Cell Communication ; *Cell Differentiation ; Cell Division ; Drosophila/cytology/*genetics ; Female ; Genes, Insect ; Genes, Plant ; Oocytes/cytology ; Ovary/cytology ; Stem Cells/*cytology
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    Control of alternative splicing of potassium channels by stress hormones (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-05-09
    Description: Many molecular mechanisms for neural adaptation to stress remain unknown. Expression of alternative splice variants of Slo, a gene encoding calcium- and voltage-activated potassium channels, was measured in rat adrenal chromaffin tissue from normal and hypophysectomized animals. Hypophysectomy triggered an abrupt decrease in the proportion of Slo transcripts containing a "STREX" exon. The decrease was prevented by adrenocorticotropic hormone injections. In Xenopus oocytes, STREX variants produced channels with functional properties associated with enhanced repetitive firing. Thus, the hormonal stress axis is likely to control the excitable properties of epinephrine-secreting cells by regulating alternative splicing of Slo messenger RNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xie, J -- McCobb, D P -- New York, N.Y. -- Science. 1998 Apr 17;280(5362):443-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9545224" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Medulla/*metabolism ; Adrenocorticotropic Hormone/metabolism/*pharmacology ; *Alternative Splicing ; Amino Acid Sequence ; Animals ; Chromaffin Cells/*metabolism ; Corticosterone/blood/*metabolism ; Dexamethasone/pharmacology ; Epinephrine/secretion ; Exons ; Female ; Hypophysectomy ; Large-Conductance Calcium-Activated Potassium Channel alpha Subunits ; Large-Conductance Calcium-Activated Potassium Channels ; Male ; Molecular Sequence Data ; Oocytes ; Phenylethanolamine N-Methyltransferase/genetics ; Polymerase Chain Reaction ; Potassium Channels/*genetics ; *Potassium Channels, Calcium-Activated ; RNA, Messenger/genetics/metabolism ; Rats ; Rats, Sprague-Dawley ; Xenopus
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    Functional expression of a mammalian odorant receptor (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-01-31
    Description: Candidate mammalian odorant receptors were first cloned some 6 years ago. The physiological function of these receptors in initiating transduction in olfactory receptor neurons remains to be established. Here, a recombinant adenovirus was used to drive expression of a particular receptor gene in an increased number of sensory neurons in the rat olfactory epithelium. Electrophysiological recording showed that increased expression of a single gene led to greater sensitivity to a small subset of odorants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhao, H -- Ivic, L -- Otaki, J M -- Hashimoto, M -- Mikoshiba, K -- Firestein, S -- New York, N.Y. -- Science. 1998 Jan 9;279(5348):237-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Interdepartmental Neuroscience Program, Yale University, New Haven, CT 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9422698" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviridae/genetics/physiology ; Aldehydes/metabolism/*pharmacology ; Animals ; Electrophysiology ; Female ; Gene Expression ; Genetic Vectors ; Green Fluorescent Proteins ; Luminescent Proteins/analysis/genetics ; Male ; *Odors ; Olfactory Receptor Neurons/*physiology/virology ; Patch-Clamp Techniques ; Rats ; Rats, Sprague-Dawley ; Receptors, Odorant/genetics/metabolism/*physiology ; Recombinant Proteins
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  • 232
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    Fertilization defects in sperm from mice lacking fertilin beta (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-09-22
    Description: Fertilin, a member of the ADAM family, is found on the plasma membrane of mammalian sperm. Sperm from mice lacking fertilin beta were shown to be deficient in sperm-egg membrane adhesion, sperm-egg fusion, migration from the uterus into the oviduct, and binding to the egg zona pellucida. Egg activation was unaffected. The results are consistent with a direct role of fertilin in sperm-egg plasma membrane interaction. Fertilin could also have a direct role in sperm-zona binding or oviduct migration; alternatively, the effects on these functions could result from the absence of fertilin activity during spermatogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cho, C -- Bunch, D O -- Faure, J E -- Goulding, E H -- Eddy, E M -- Primakoff, P -- Myles, D G -- HD16580/HD/NICHD NIH HHS/ -- U54HD29125/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1998 Sep 18;281(5384):1857-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Molecular and Cellular Biology, University of California, Davis, CA 95616, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9743500" target="_blank"〉PubMed〈/a〉
    Keywords: ADAM Proteins ; Animals ; Calcium/metabolism ; Cell Adhesion ; Cell Membrane/physiology ; Fallopian Tubes ; Female ; Male ; Membrane Fusion ; Membrane Glycoproteins/genetics/metabolism/*physiology ; Metalloendopeptidases/genetics/metabolism/*physiology ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Ovum/physiology ; Sperm Capacitation ; *Sperm-Ovum Interactions ; Spermatogenesis ; Spermatozoa/chemistry/*physiology ; Zona Pellucida/physiology
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    ART into science: regulation of fertility techniques. ISLAT (Institute for Science Law, and Technology) Working Group (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-08-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1998 Jul 31;281(5377):651-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9714673" target="_blank"〉PubMed〈/a〉
    Keywords: Data Collection ; Disclosure ; Embryo Transfer ; Federal Government ; Female ; *Government Regulation ; Humans ; Information Dissemination ; Informed Consent ; Licensure ; Male ; Practice Guidelines as Topic ; Records as Topic ; Reproductive Techniques/adverse effects/*legislation & jurisprudence/*standards ; United States
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    A genomic battle of the sexes (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-10-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 1998 Sep 25;281(5385):1984-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9767051" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arabidopsis/embryology/genetics ; *Biological Evolution ; Embryonic and Fetal Development/*genetics ; Female ; Genes, Plant ; *Genomic Imprinting ; Humans ; Insects/*genetics ; Male ; Peromyscus ; Seeds/*growth & development
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 235
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    Axonal swellings and degeneration in mice lacking the major proteolipid of myelin (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-06-11
    Description: Glial cells produce myelin and contribute to axonal morphology in the nervous system. Two myelin membrane proteolipids, PLP and DM20, were shown to be essential for the integrity of myelinated axons. In the absence of PLP-DM20, mice assembled compact myelin sheaths but subsequently developed widespread axonal swellings and degeneration, associated predominantly with small-caliber nerve fibers. Similar swellings were absent in dysmyelinated shiverer mice, which lack myelin basic protein (MBP), but recurred in MBP*PLP double mutants. Thus, fiber degeneration, which was probably secondary to impaired axonal transport, could indicate that myelinated axons require local oligodendroglial support.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Griffiths, I -- Klugmann, M -- Anderson, T -- Yool, D -- Thomson, C -- Schwab, M H -- Schneider, A -- Zimmermann, F -- McCulloch, M -- Nadon, N -- Nave, K A -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1998 Jun 5;280(5369):1610-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Applied Neurobiology Group, Department of Veterinary Clinical Studies, University of Glasgow, Glasgow G61 1QH, Scotland, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9616125" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axonal Transport ; Axons/*physiology/*ultrastructure ; Cell Communication ; Central Nervous System/*ultrastructure ; Female ; Mice ; Mice, Neurologic Mutants ; Models, Neurological ; Motor Activity ; Myelin Proteolipid Protein/analysis/genetics/*physiology ; Myelin Sheath/chemistry/physiology/ultrastructure ; Nerve Degeneration/*pathology ; *Nerve Tissue Proteins ; Oligodendroglia/physiology ; Optic Nerve/ultrastructure ; Organelles/ultrastructure ; Spinal Cord/ultrastructure ; Transgenes
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Females pick good genes in frogs, flies (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-07-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 1998 Jun 19;280(5371):1837-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9669933" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anura/*genetics/physiology ; Diptera/*genetics/physiology ; Eye/anatomy & histology ; Female ; *Genes ; Male ; Sex Ratio ; *Sexual Behavior, Animal ; Vocalization, Animal
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    Prevention of cardiac hypertrophy in mice by calcineurin inhibition (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-09-11
    Description: Hypertrophic cardiomyopathy (HCM) is an inherited form of heart disease that affects 1 in 500 individuals. Here it is shown that calcineurin, a calcium-regulated phosphatase, plays a critical role in the pathogenesis of HCM. Administration of the calcineurin inhibitors cyclosporin and FK506 prevented disease in mice that were genetically predisposed to develop HCM as a result of aberrant expression of tropomodulin, myosin light chain-2, or fetal beta-tropomyosin in the heart. Cyclosporin had a similar effect in a rat model of pressure-overload hypertrophy. These results suggest that calcineurin inhibitors merit investigation as potential therapeutics for certain forms of human heart disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sussman, M A -- Lim, H W -- Gude, N -- Taigen, T -- Olson, E N -- Robbins, J -- Colbert, M C -- Gualberto, A -- Wieczorek, D F -- Molkentin, J D -- HL58224-01/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1998 Sep 11;281(5383):1690-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Molecular Cardiovascular Biology, Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, OH 45229, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9733519" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcineurin/metabolism ; *Calcineurin Inhibitors ; Calcium/metabolism ; *Cardiac Myosins ; Cardiomegaly/metabolism/pathology/*prevention & control ; Cardiomyopathy, Dilated/pathology/*prevention & control ; Cardiomyopathy, Hypertrophic/genetics/metabolism/pathology/*prevention & control ; Carrier Proteins/genetics ; Cyclosporine/*pharmacology ; Female ; Mice ; Mice, Transgenic ; *Microfilament Proteins ; Models, Cardiovascular ; Myocardium/*metabolism/pathology ; Myosin Light Chains/genetics/metabolism ; Rats ; Signal Transduction ; Tacrolimus/*pharmacology ; Tropomodulin ; Tropomyosin/genetics
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    Genetics of mouse behavior: interactions with laboratory environment (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-05
    Description: Strains of mice that show characteristic patterns of behavior are critical for research in neurobehavioral genetics. Possible confounding influences of the laboratory environment were studied in several inbred strains and one null mutant by simultaneous testing in three laboratories on a battery of six behaviors. Apparatus, test protocols, and many environmental variables were rigorously equated. Strains differed markedly in all behaviors, and despite standardization, there were systematic differences in behavior across labs. For some tests, the magnitude of genetic differences depended upon the specific testing lab. Thus, experiments characterizing mutants may yield results that are idiosyncratic to a particular laboratory.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Crabbe, J C -- Wahlsten, D -- Dudek, B C -- AA00170/AA/NIAAA NIH HHS/ -- AA10760/AA/NIAAA NIH HHS/ -- DA10731/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1999 Jun 4;284(5420):1670-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Portland Alcohol Research Center, Department of Veterans Affairs Medical Center, Portland, OR 97201, USA. crabbe@ohsu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10356397" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Laboratory/genetics ; Anxiety ; *Behavior, Animal ; Confounding Factors (Epidemiology) ; Drinking Behavior ; *Environment ; Female ; Genetics, Behavioral/*methods ; Genotype ; Male ; Mice ; Mice, Inbred Strains/genetics ; Mice, Mutant Strains/genetics ; Motor Activity ; Psychological Tests ; Reproducibility of Results
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    An allele of COL9A2 associated with intervertebral disc disease (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-20
    Description: Intervertebral disc disease is one of the most common musculoskeletal disorders. A number of environmental and anthropometric risk factors may contribute to it, and recent reports have suggested the importance of genetic factors as well. The COL9A2 gene, which codes for one of the polypeptide chains of collagen IX that is expressed in the intervertebral disc, was screened for sequence variations in individuals with intervertebral disc disease. The analysis identified a putative disease-causing sequence variation that converted a codon for glutamine to one for tryptophan in six out of the 157 individuals but in none of 174 controls. The tryptophan allele cosegregated with the disease phenotype in the four families studied, giving a lod score (logarithm of odds ratio) for linkage of 4.5, and subsequent linkage disequilibrium analysis conditional on linkage gave an additional lod score of 7.1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Annunen, S -- Paassilta, P -- Lohiniva, J -- Perala, M -- Pihlajamaa, T -- Karppinen, J -- Tervonen, O -- Kroger, H -- Lahde, S -- Vanharanta, H -- Ryhanen, L -- Goring, H H -- Ott, J -- Prockop, D J -- Ala-Kokko, L -- AR39740/AR/NIAMS NIH HHS/ -- HG00008/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 16;285(5426):409-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Collagen Research Unit, Biocenter and Department of Medical Biochemistry, University of Oulu, 90220 Oulu, Finland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10411504" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Alleles ; Amino Acid Substitution ; Case-Control Studies ; Codon ; Collagen/chemistry/*genetics ; *Collagen Type IX ; Female ; Genetic Linkage ; *Genetic Predisposition to Disease ; Humans ; Intervertebral Disc Displacement/*genetics ; Linkage Disequilibrium ; Male ; Middle Aged ; Mutation ; Penetrance ; Polymorphism, Genetic ; Sciatica/*genetics ; Tryptophan/genetics
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    Heterozygous germ line hCHK2 mutations in Li-Fraumeni syndrome (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-05
    Description: The hCHK2 gene encodes the human homolog of the yeast Cds1 and Rad53 G2 checkpoint kinases, whose activation in response to DNA damage prevents cellular entry into mitosis. Here, it is shown that heterozygous germ line mutations in hCHK2 occur in Li-Fraumeni syndrome, a highly penetrant familial cancer phenotype usually associated with inherited mutations in the TP53 gene. These observations suggest that hCHK2 is a tumor suppressor gene conferring predisposition to sarcoma, breast cancer, and brain tumors, and they also provide a link between the central role of p53 inactivation in human cancer and the well-defined G2 checkpoint in yeast.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bell, D W -- Varley, J M -- Szydlo, T E -- Kang, D H -- Wahrer, D C -- Shannon, K E -- Lubratovich, M -- Verselis, S J -- Isselbacher, K J -- Fraumeni, J F -- Birch, J M -- Li, F P -- Garber, J E -- Haber, D A -- New York, N.Y. -- Science. 1999 Dec 24;286(5449):2528-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Massachusetts General Hospital Center for Cancer Risk Analysis and Harvard Medical School, Building 149, Charlestown, MA 02129, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10617473" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Apoptosis ; Brain Neoplasms/genetics ; Breast Neoplasms/genetics ; Checkpoint Kinase 2 ; Female ; G1 Phase ; *G2 Phase ; *Genes, Tumor Suppressor ; Genes, p53 ; Genetic Predisposition to Disease ; *Germ-Line Mutation ; Heterozygote ; Humans ; Li-Fraumeni Syndrome/enzymology/*genetics/pathology ; Male ; Pedigree ; Polymorphism, Genetic ; Protein Kinases/genetics ; Protein-Serine-Threonine Kinases/*genetics/metabolism ; Sarcoma/genetics ; Signal Transduction ; Tumor Cells, Cultured
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    Cortical mechanisms of human imitation (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-05
    Description: How does imitation occur? How can the motor plans necessary for imitating an action derive from the observation of that action? Imitation may be based on a mechanism directly matching the observed action onto an internal motor representation of that action ("direct matching hypothesis"). To test this hypothesis, normal human participants were asked to observe and imitate a finger movement and to perform the same movement after spatial or symbolic cues. Brain activity was measured with functional magnetic resonance imaging. If the direct matching hypothesis is correct, there should be areas that become active during finger movement, regardless of how it is evoked, and their activation should increase when the same movement is elicited by the observation of an identical movement made by another individual. Two areas with these properties were found in the left inferior frontal cortex (opercular region) and the rostral-most region of the right superior parietal lobule.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Iacoboni, M -- Woods, R P -- Brass, M -- Bekkering, H -- Mazziotta, J C -- Rizzolatti, G -- New York, N.Y. -- Science. 1999 Dec 24;286(5449):2526-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Brain Mapping Center, Neuropsychiatric Institute, Department of Psychiatry, UCLA School of Medicine, Los Angeles, CA 90095-7085, USA. iacoboni@loni.ucla.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10617472" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Brain Mapping ; Cues ; Female ; Fingers/physiology ; Frontal Lobe/*physiology ; Humans ; Imitative Behavior/*physiology ; Magnetic Resonance Imaging ; Male ; Movement ; Neurons/physiology ; Parietal Lobe/*physiology
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    BRCA1 inhibition of estrogen receptor signaling in transfected cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-21
    Description: Mutations of the breast cancer susceptibility gene BRCA1 confer increased risk for breast, ovarian, and prostatic cancers, but it is not clear why the mutations are associated with these particular tumor types. In transient transfection assays, BRCA1 was found to inhibit signaling by the ligand-activated estrogen receptor (ER-alpha) through the estrogen-responsive enhancer element and to block the transcriptional activation function AF-2 of ER-alpha. These results raise the possibility that wild-type BRCA1 suppresses estrogen-dependent transcriptional pathways related to mammary epithelial cell proliferation and that loss of this ability contributes to tumorigenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fan, S -- Wang, J -- Yuan, R -- Ma, Y -- Meng, Q -- Erdos, M R -- Pestell, R G -- Yuan, F -- Auborn, K J -- Goldberg, I D -- Rosen, E M -- R01-CA75503/CA/NCI NIH HHS/ -- R01-ES09169/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1999 May 21;284(5418):1354-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Radiation Oncology, Long Island Jewish Medical Center, The Long Island Campus for the Albert Einstein College of Medicine, 270-05 76th Avenue, New Hyde Park, NY 11040, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10334989" target="_blank"〉PubMed〈/a〉
    Keywords: BRCA1 Protein/*physiology ; Breast/cytology ; Breast Neoplasms/etiology ; Cell Division ; Enhancer Elements, Genetic ; Epithelial Cells/cytology ; Estradiol/metabolism ; Estrogen Receptor alpha ; Female ; Genes, BRCA1 ; Genes, Reporter ; Humans ; Ligands ; Male ; Receptors, Estrogen/*metabolism ; *Signal Transduction ; Transcription Factors/metabolism ; *Transcriptional Activation ; Transfection ; Tumor Cells, Cultured
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    Effects of angiogenesis inhibitors on multistage carcinogenesis in mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-30
    Description: Solid tumors depend on angiogenesis for their growth. In a transgenic mouse model of pancreatic islet cell carcinogenesis (RIP1-Tag2), an angiogenic switch occurs in premalignant lesions, and angiogenesis persists during progression to expansive solid tumors and invasive carcinomas. RIP1-Tag2 mice were treated so as to compare the effects of four angiogenesis inhibitors at three distinct stages of disease progression. AGM-1470, angiostatin, BB-94, and endostatin each produced distinct efficacy profiles in trials aimed at preventing the angiogenic switch in premalignant lesions, intervening in the rapid expansion of small tumors, or inducing the regression of large end-stage cancers. Thus, anti-angiogenic drugs may prove most efficacious when they are targeted to specific stages of cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bergers, G -- Javaherian, K -- Lo, K M -- Folkman, J -- Hanahan, D -- New York, N.Y. -- Science. 1999 Apr 30;284(5415):808-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics and Hormone Research Institute, University of California, San Francisco, 513 Parnassus Ave, San Francisco, CA 94143-0534, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10221914" target="_blank"〉PubMed〈/a〉
    Keywords: Angiostatins ; Animals ; Anticarcinogenic Agents/pharmacology ; Antineoplastic Agents/*pharmacology ; Apoptosis ; Carcinoma, Islet Cell/blood supply/*drug therapy/pathology/prevention & control ; Collagen/pharmacology ; Cyclohexanes ; Disease Progression ; Drug Evaluation, Preclinical ; Endostatins ; Female ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Neoplasm Staging ; Neovascularization, Pathologic/*prevention & control ; Pancreatic Neoplasms/blood supply/*drug therapy/pathology/prevention & control ; Peptide Fragments/pharmacology ; Phenylalanine/analogs & derivatives/pharmacology ; Plasminogen/pharmacology ; Sesquiterpenes/pharmacology ; Thiophenes/pharmacology
    Print ISSN: 0036-8075
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    Impaired immunoproteasome assembly and immune responses in PA28-/- mice (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-11
    Description: In vitro PA28 binds and activates proteasomes. It is shown here that mice with a disrupted PA28b gene lack PA28a and PA28b polypeptides, demonstrating that PA28 functions as a hetero-oligomer in vivo. Processing of antigenic epitopes derived from exogenous or endogenous antigens is altered in PA28-/- mice. Cytotoxic T lymphocyte responses are impaired, and assembly of immunoproteasomes is greatly inhibited in mice lacking PA28. These results show that PA28 is necessary for immunoproteasome assembly and is required for efficient antigen processing, thus demonstrating the importance of PA28-mediated proteasome function in immune responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Preckel, T -- Fung-Leung, W P -- Cai, Z -- Vitiello, A -- Salter-Cid, L -- Winqvist, O -- Wolfe, T G -- Von Herrath, M -- Angulo, A -- Ghazal, P -- Lee, J D -- Fourie, A M -- Wu, Y -- Pang, J -- Ngo, K -- Peterson, P A -- Fruh, K -- Yang, Y -- New York, N.Y. -- Science. 1999 Dec 10;286(5447):2162-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The R. W. Johnson Pharmaceutical Research Institute, 3210 Merryfield Row, San Diego, CA 92121, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10591649" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antigen Presentation ; Autoantigens ; Cysteine Endopeptidases/chemistry/*metabolism ; Enzyme Activators/*metabolism ; Epitopes, T-Lymphocyte/immunology ; Female ; H-Y Antigen/immunology ; Herpesviridae Infections/immunology ; Histocompatibility Antigens Class I/immunology/metabolism ; Interferons/pharmacology ; Lymphocytic Choriomeningitis/immunology ; Lymphocytic choriomeningitis virus/immunology ; Male ; Mice ; Multienzyme Complexes/chemistry/*metabolism ; Muromegalovirus/immunology ; Ovalbumin/immunology ; Peptide Fragments/immunology ; Proteasome Endopeptidase Complex ; Proteins/genetics/*metabolism ; T-Lymphocytes, Cytotoxic/*immunology
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    Can mitochondrial clocks keep time? (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Strauss, E -- New York, N.Y. -- Science. 1999 Mar 5;283(5407):1435, 1437-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10206868" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA, Mitochondrial/*genetics ; *Evolution, Molecular ; Female ; Fossils ; Humans ; Male ; Mutation ; Ovum ; *Paleontology ; Recombination, Genetic ; Spermatozoa ; Statistics as Topic
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    Uses and abuses of Tuskegee (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fairchild, A L -- Bayer, R -- New York, N.Y. -- Science. 1999 May 7;284(5416):919-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in the History of Public Health and Medicine, Division of Sociomedical Sciences, The Joseph L. Mailman School of Public Health, Columbia University, New York, NY 10032-2625, USA. alf4@columbia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10357678" target="_blank"〉PubMed〈/a〉
    Keywords: African Americans/history ; Alabama ; Anonymous Testing ; Anti-HIV Agents/*therapeutic use ; Clinical Trials as Topic ; Developing Countries ; Disclosure ; Ethics, Medical ; Female ; HIV Infections/prevention & control/*transmission ; *HIV Seroprevalence ; History, 20th Century ; *Human Experimentation/history ; Humans ; Infectious Disease Transmission, Vertical/*prevention & control ; Informed Consent/history ; Male ; *Needle-Exchange Programs ; *Persons ; Pregnant Women ; Syphilis/history ; *Trust ; United States ; *Vulnerable Populations ; Withholding Treatment
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    Proapoptotic Bcl-2 relative Bim required for certain apoptotic responses, leukocyte homeostasis, and to preclude autoimmunity (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-27
    Description: Apoptosis can be triggered by members of the Bcl-2 protein family, such as Bim, that share only the BH3 domain with this family. Gene targeting in mice revealed important physiological roles for Bim. Lymphoid and myeloid cells accumulated, T cell development was perturbed, and most older mice accumulated plasma cells and succumbed to autoimmune kidney disease. Lymphocytes were refractory to apoptotic stimuli such as cytokine deprivation, calcium ion flux, and microtubule perturbation but not to others. Thus, Bim is required for hematopoietic homeostasis and as a barrier to autoimmunity. Moreover, particular death stimuli appear to activate apoptosis through distinct BH3-only proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bouillet, P -- Metcalf, D -- Huang, D C -- Tarlinton, D M -- Kay, T W -- Kontgen, F -- Adams, J M -- Strasser, A -- CA43540/CA/NCI NIH HHS/ -- CA80188/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 26;286(5445):1735-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Walter and Eliza Hall Institute of Medical Research, Melbourne, Victoria 3050, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10576740" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Apoptosis Regulatory Proteins ; Autoimmune Diseases/etiology ; *Autoimmunity ; B-Lymphocytes/physiology ; Carrier Proteins/*physiology ; Cells, Cultured ; Crosses, Genetic ; Female ; Gene Targeting ; Glomerulonephritis/etiology ; Hematopoietic Stem Cells/physiology ; Homeostasis ; Leukocyte Count ; Leukocytes/*physiology ; Male ; *Membrane Proteins ; Mice ; Mice, Transgenic ; *Proto-Oncogene Proteins ; Proto-Oncogene Proteins c-bcl-2/physiology ; Signal Transduction ; T-Lymphocyte Subsets/physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Were Spaniards among the first Americans? (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1999 Nov 19;286(5444):1467-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10712138" target="_blank"〉PubMed〈/a〉
    Keywords: Americas ; Animals ; *Archaeology ; Asia ; Australia ; Emigration and Immigration/history ; Europe ; Female ; History, Ancient ; *Hominidae ; Humans ; Paleontology ; Skull/anatomy & histology
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    Sexual transmission and propagation of SIV and HIV in resting and activated CD4+ T cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-13
    Description: In sexual transmission of simian immunodeficiency virus, and early and later stages of human immunodeficiency virus-type 1 (HIV-1) infection, both viruses were found to replicate predominantly in CD4(+) T cells at the portal of entry and in lymphoid tissues. Infection was propagated not only in activated and proliferating T cells but also, surprisingly, in resting T cells. The infected proliferating cells correspond to the short-lived population that produces the bulk of HIV-1. Most of the HIV-1-infected resting T cells persisted after antiretroviral therapy. Latently and chronically infected cells that may be derived from this population pose challenges to eradicating infection and developing an effective vaccine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Z -- Schuler, T -- Zupancic, M -- Wietgrefe, S -- Staskus, K A -- Reimann, K A -- Reinhart, T A -- Rogan, M -- Cavert, W -- Miller, C J -- Veazey, R S -- Notermans, D -- Little, S -- Danner, S A -- Richman, D D -- Havlir, D -- Wong, J -- Jordan, H L -- Schacker, T W -- Racz, P -- Tenner-Racz, K -- Letvin, N L -- Wolinsky, S -- Haase, A T -- AI 28246/AI/NIAID NIH HHS/ -- AI 38565/AI/NIAID NIH HHS/ -- RR 00168/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 12;286(5443):1353-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, University of Minnesota Medical School, Minneapolis, MN 55455, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10558989" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-HIV Agents/therapeutic use ; CD4-Positive T-Lymphocytes/cytology/immunology/*virology ; Cell Cycle ; Cervix Uteri/virology ; Epithelial Cells/virology ; Female ; HIV Infections/drug therapy/*transmission/virology ; HIV-1/*physiology ; Lymph Nodes/virology ; *Lymphocyte Activation ; Macaca mulatta ; RNA, Viral/analysis ; Simian Acquired Immunodeficiency Syndrome/*transmission/virology ; Simian Immunodeficiency Virus/*physiology ; Time Factors ; Virus Replication
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Perspectives: evolutionary biology. Sex and death (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Resznick, D N -- Ghalambor, C -- New York, N.Y. -- Science. 1999 Dec 24;286(5449):2458-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of California, Riverside, CA 92521, USA. david.reznick@ucr.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10636809" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging/genetics ; Animals ; *Biological Evolution ; Drosophila/genetics/physiology ; Female ; *Longevity/genetics ; Male ; *Reproduction/genetics ; Selection, Genetic
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    Evolving smarts (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Duke, J A -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):589.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10328736" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Brain ; Cooking ; Estrogens, Non-Steroidal/*analysis ; Female ; *Hominidae ; Humans ; *Isoflavones ; Male ; Phytoestrogens ; Plant Preparations ; *Vegetables/chemistry
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    KDR receptor: a key marker defining hematopoietic stem cells (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-09-08
    Description: Studies on pluripotent hematopoietic stem cells (HSCs) have been hindered by lack of a positive marker, comparable to the CD34 marker of hematopoietic progenitor cells (HPCs). In human postnatal hematopoietic tissues, 0.1 to 0.5% of CD34(+) cells expressed vascular endothelial growth factor receptor 2 (VEGFR2, also known as KDR). Pluripotent HSCs were restricted to the CD34+KDR+ cell fraction. Conversely, lineage-committed HPCs were in the CD34+KDR- subset. On the basis of limiting dilution analysis, the HSC frequency in the CD34+KDR+ fraction was 20 percent in bone marrow (BM) by mouse xenograft assay and 25 to 42 percent in BM, peripheral blood, and cord blood by 12-week long-term culture (LTC) assay. The latter values rose to 53 to 63 percent in LTC supplemented with VEGF and to greater than 95 percent for the cell subfraction resistant to growth factor starvation. Thus, KDR is a positive functional marker defining stem cells and distinguishing them from progenitors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ziegler, B L -- Valtieri, M -- Porada, G A -- De Maria, R -- Muller, R -- Masella, B -- Gabbianelli, M -- Casella, I -- Pelosi, E -- Bock, T -- Zanjani, E D -- Peschle, C -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1553-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Hematology and Oncology, University of Tubingen, Otfried-Muller-Strasse 10, D-72076 Tubingen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10477517" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD34/*analysis ; Bone Marrow Cells/cytology ; Cell Lineage ; Cell Separation ; Cells, Cultured ; Endothelial Growth Factors/pharmacology ; Female ; Fetal Blood/cytology ; Fetus ; Flow Cytometry ; *Hematopoiesis ; Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells/chemistry/*cytology/drug effects/physiology ; Humans ; Lymphokines/pharmacology ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Phenotype ; Pregnancy ; Receptor Protein-Tyrosine Kinases/*analysis/physiology ; Receptors, Growth Factor/*analysis/physiology ; Receptors, Vascular Endothelial Growth Factor ; Sheep ; Transplantation, Heterologous ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors
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    DNA and field data help plumb evolution's secrets (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 1999 Jul 9;285(5425):192-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10428714" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Female ; Genes, Recessive ; Genetic Variation ; Inbreeding ; Male ; Moths/genetics/physiology ; Plants/genetics ; Songbirds/genetics/physiology
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    Impaired B cell development and proliferation in absence of phosphoinositide 3-kinase p85alpha (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-15
    Description: Phosphoinositide 3-kinase (PI3K) activation has been implicated in many cellular responses, including fibroblast growth, transformation, survival, and chemotaxis. Although PI3K is activated by several agents that stimulate T and B cells, the role of PI3K in lymphocyte function is not clear. The mouse gene encoding the PI3K adapter subunit p85alpha and its splice variants p55alpha and p50alpha was disrupted. Most p85alpha-p55alpha-p50alpha-/- mice die within days after birth. Lymphocyte development and function was studied with the use of the RAG2-deficient blastocyst complementation system. Chimeric mice had reduced numbers of peripheral mature B cells and decreased serum immunoglobulin. The B cells that developed had diminished proliferative responses to antibody to immunoglobulin M, antibody to CD40, and lipopolysaccharide stimulation and decreased survival after incubation with interleukin-4. In contrast, T cell development and proliferation was normal. This phenotype is similar to defects observed in mice lacking the tyrosine kinase Btk.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fruman, D A -- Snapper, S B -- Yballe, C M -- Davidson, L -- Yu, J Y -- Alt, F W -- Cantley, L C -- R01 GM041890/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):393-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Signal Transduction, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA. dfruman@bidmc.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9888855" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD45/analysis ; Apoptosis ; B-Lymphocytes/cytology/enzymology/*immunology ; Catalytic Domain ; Cell Cycle ; Chimera ; Chromones/pharmacology ; Enzyme Inhibitors/pharmacology ; Female ; Gene Targeting ; Immunoglobulins/*blood ; *Lymphocyte Activation ; Lymphocyte Count ; Male ; Mice ; Mice, Inbred C57BL ; Morpholines/pharmacology ; Phosphatidylinositol 3-Kinases/antagonists & inhibitors/genetics/*metabolism ; Protein-Tyrosine Kinases/genetics/metabolism ; Spleen/immunology ; T-Lymphocytes/cytology/enzymology/immunology
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    Broadly protective vaccine for Staphylococcus aureus based on an in vivo-expressed antigen (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-05-29
    Description: Vaccines based on preferential expression of bacterial antigens during human infection have not been described. Staphylococcus aureus synthesized poly-N-succinyl beta-1-6 glucosamine (PNSG) as a surface polysaccharide during human and animal infection, but few strains expressed PNSG in vitro. All S. aureus strains examined carried genes for PNSG synthesis. Immunization protected mice against kidney infections and death from strains that produced little PNSG in vitro. Nonimmune infected animals made antibody to PNSG, but serial in vitro cultures of kidney isolates yielded mostly cells that did not produce PNSG. PNSG is a candidate for use in a vaccine to protect against S. aureus infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McKenney, D -- Pouliot, K L -- Wang, Y -- Murthy, V -- Ulrich, M -- Doring, G -- Lee, J C -- Goldmann, D A -- Pier, G B -- AI2335/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 May 28;284(5419):1523-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Department of Medicine, Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10348739" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Bacterial/*biosynthesis/blood ; Bacterial Capsules/immunology ; Child ; Female ; Genes, Bacterial ; Humans ; Immunization, Passive ; Immunoglobulin G/biosynthesis/blood ; Kidney/immunology/microbiology ; Kidney Diseases/immunology/microbiology/prevention & control ; Mice ; Polysaccharides, Bacterial/biosynthesis/*immunology ; Rabbits ; Staphylococcal Infections/immunology/microbiology/*prevention & control ; Staphylococcal Vaccines/*immunology ; Staphylococcus aureus/genetics/*immunology ; Vaccination
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    Truncated RanGAP encoded by the Segregation Distorter locus of Drosophila (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-12
    Description: Segregation Distorter (SD) in Drosophila melanogaster is a naturally occurring meiotic drive system in which the SD chromosome is transmitted from SD/SD+ males in vast excess over its homolog owing to the induced dysfunction of SD+-bearing spermatids. The Sd locus is the key distorting gene responsible for this phenotype. A genomic fragment from the Sd region conferred full distorting activity when introduced into the appropriate genetic background by germline transformation. The only functional product encoded by this fragment is a truncated version of the RanGAP nuclear transport protein. These results demonstrate that this mutant RanGAP is the functional Sd product.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Merrill, C -- Bayraktaroglu, L -- Kusano, A -- Ganetzky, B -- New York, N.Y. -- Science. 1999 Mar 12;283(5408):1742-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genetics, 445 Henry Mall, University of Wisconsin, Madison, WI 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10073941" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carrier Proteins/chemistry/*genetics/physiology ; Cell Nucleus/metabolism ; Crosses, Genetic ; DNA, Complementary ; *Drosophila Proteins ; Drosophila melanogaster/*genetics/physiology ; Female ; *GTPase-Activating Proteins ; Gene Duplication ; Gene Expression ; *Genes, Insect ; Male ; *Meiosis ; Nuclear Proteins/chemistry/*genetics/physiology ; RNA, Messenger/genetics ; Spermatids/physiology ; Sulfotransferases/chemistry/genetics ; Transcription, Genetic ; Transformation, Genetic
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    Mycolactone: a polyketide toxin from Mycobacterium ulcerans required for virulence (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-02-05
    Description: Mycobacterium ulcerans is the causative agent of Buruli ulcer, a severe human skin disease that occurs primarily in Africa and Australia. Infection with M. ulcerans results in persistent severe necrosis without an acute inflammatory response. The presence of histopathological changes distant from the site of infection suggested that pathogenesis might be toxin mediated. A polyketide-derived macrolide designated mycolactone was isolated that causes cytopathicity and cell cycle arrest in cultured L929 murine fibroblasts. Intradermal inoculation of purified toxin into guinea pigs produced a lesion similar to that of Buruli ulcer in humans. This toxin may represent one of a family of virulence factors associated with pathology in mycobacterial diseases such as leprosy and tuberculosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉George, K M -- Chatterjee, D -- Gunawardana, G -- Welty, D -- Hayman, J -- Lee, R -- Small, P L -- New York, N.Y. -- Science. 1999 Feb 5;283(5403):854-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9933171" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacterial Toxins/chemistry/*isolation & purification/*toxicity ; Cell Cycle/drug effects ; Chromatography, High Pressure Liquid ; Chromatography, Thin Layer ; Female ; Guinea Pigs ; L Cells (Cell Line) ; Macrolides ; Mass Spectrometry ; Mice ; Mycobacterium Infections, Nontuberculous/microbiology/pathology ; Mycobacterium ulcerans/chemistry/*pathogenicity ; Necrosis ; Skin/microbiology/pathology ; Skin Diseases, Bacterial/microbiology/pathology ; Virulence
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    Cholesterol-lowering drugs may boost bones (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1825-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610568" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anticholesteremic Agents/*pharmacology ; Bone Density/*drug effects ; Bone Morphogenetic Protein 2 ; Bone Morphogenetic Proteins/biosynthesis ; Clinical Trials as Topic ; Female ; Humans ; Hydroxymethylglutaryl-CoA Reductase Inhibitors/*pharmacology ; Lovastatin/*pharmacology ; Mice ; Osteogenesis/*drug effects ; Osteoporosis/drug therapy ; Rats ; Simvastatin/pharmacology ; *Transforming Growth Factor beta
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Evolution. Handsome finches win a boost for their offspring (1999)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1999-10-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):23.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10532882" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dihydrotestosterone/metabolism ; Egg Yolk/metabolism ; Female ; Genes ; Male ; Ovum/*metabolism ; *Sexual Behavior, Animal ; Songbirds/genetics/*physiology ; Testosterone/*metabolism
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    The vomeronasal organ (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-26
    Description: The vomeronasal organ (VNO) is a chemoreceptor organ enclosed in a cartilaginous capsule and separated from the main olfactory epithelium. The vomeronasal neurons have two distinct types of receptor that differ from each other and from the large family of odorant receptors. The VNO receptors are seven-transmembrane receptors coupled to GTP-binding protein, but appear to activate inositol 1,4,5-trisphosphate signaling as opposed to cyclic adenosine monophosphate. The nature of stimulus access suggests that the VNO responds to nonvolatile cues, leading to activation of the hypothalamus by way of the accessory olfactory bulb and amygdala. The areas of hypothalamus innervated regulate reproductive, defensive, and ingestive behavior as well as neuroendocrine secretion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Keverne, E B -- New York, N.Y. -- Science. 1999 Oct 22;286(5440):716-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Sub-Department of Animal Behaviour, University of Cambridge, Madingley, Cambridge CB3 8AA, UK. ebk10@cus.cam.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10531049" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Afferent Pathways ; Animals ; Behavior, Animal ; Chemoreceptor Cells/chemistry/*physiology ; Female ; GTP-Binding Proteins/metabolism ; Humans ; Hypothalamus/physiology ; Male ; Neurons, Afferent/*physiology ; Olfactory Bulb/physiology ; Pheromones/physiology ; Receptors, Cell Surface/chemistry/genetics/*physiology ; Signal Transduction ; Vomeronasal Organ/anatomy & histology/innervation/*physiology
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    Drosophila S6 kinase: a regulator of cell size (1999)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1999-09-25
    Description: Cell proliferation requires cell growth; that is, cells only divide after they reach a critical size. However, the mechanisms by which cells grow and maintain their appropriate size have remained elusive. Drosophila deficient in the S6 kinase gene (dS6K) exhibited an extreme delay in development and a severe reduction in body size. These flies had smaller cells rather than fewer cells. The effect was cell-autonomous, displayed throughout larval development, and distinct from that of ribosomal protein mutants (Minutes). Thus, the dS6K gene product regulates cell size in a cell-autonomous manner without impinging on cell number.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Montagne, J -- Stewart, M J -- Stocker, H -- Hafen, E -- Kozma, S C -- Thomas, G -- F32 GM15926/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2126-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Friedrich Miescher Institute, Maulbeerstrasse 66, 4058 Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10497130" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Body Constitution ; Cell Count ; Cell Division ; Cell Size ; Drosophila melanogaster/cytology/*enzymology/genetics/*growth & development ; Epithelial Cells/cytology ; Female ; Genes, Insect ; Larva/cytology/growth & development ; Male ; Metamorphosis, Biological ; Molecular Sequence Data ; Mutation ; Ribosomal Protein S6 Kinases/genetics/*metabolism ; Wings, Animal/*cytology/growth & development
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    Neurogenesis in the neocortex of adult primates (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: In primates, prefrontal, inferior temporal, and posterior parietal cortex are important for cognitive function. It is shown that in adult macaques, new neurons are added to these three neocortical association areas, but not to a primary sensory area (striate cortex). The new neurons appeared to originate in the subventricular zone and to migrate through the white matter to the neocortex, where they extended axons. These new neurons, which are continually added in adulthood, may play a role in the functions of association neocortex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gould, E -- Reeves, A J -- Graziano, M S -- Gross, C G -- EY11347-29/EY/NEI NIH HHS/ -- MH52423-05/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1999 Oct 15;286(5439):548-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, Princeton University, Princeton, NJ 08544, USA. goulde@princeton.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10521353" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; Astrocytes/cytology ; Axons/ultrastructure ; Bromodeoxyuridine ; Cell Differentiation ; Cell Division ; Cell Movement ; Cell Survival ; Female ; Lateral Ventricles/cytology ; Macaca fascicularis ; Male ; Microscopy, Confocal ; Neocortex/*cytology/physiology ; Neurons/*cytology/physiology ; Parietal Lobe/*cytology/physiology ; Prefrontal Cortex/*cytology/physiology ; Temporal Lobe/*cytology/physiology ; Visual Cortex/cytology/physiology
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    Mouse models of tumor development in neurofibromatosis type 1 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-11
    Description: Neurofibromatosis type 1 (NF1) is a prevalent familial cancer syndrome resulting from germ line mutations in the NF1 tumor suppressor gene. Hallmark features of the disease are the development of benign peripheral nerve sheath tumors (neurofibromas), which can progress to malignancy. Unlike humans, mice that are heterozygous for a mutation in Nf1 do not develop neurofibromas. However, as described here, chimeric mice composed in part of Nf1-/- cells do, which demonstrates that loss of the wild-type Nf1 allele is rate-limiting in tumor formation. In addition, mice that carry linked germ line mutations in Nf1 and p53 develop malignant peripheral nerve sheath tumors (MPNSTs), which supports a cooperative and causal role for p53 mutations in MPNST development. These two mouse models provide the means to address fundamental aspects of disease development and to test therapeutic strategies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cichowski, K -- Shih, T S -- Schmitt, E -- Santiago, S -- Reilly, K -- McLaughlin, M E -- Bronson, R T -- Jacks, T -- New York, N.Y. -- Science. 1999 Dec 10;286(5447):2172-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology and Center for Cancer Research and Howard Hughes Medical Institute, 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/10591652" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chimera ; *Disease Models, Animal ; Female ; *Genes, Neurofibromatosis 1 ; Genes, p53 ; Germ-Line Mutation ; Humans ; Loss of Heterozygosity ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Mutation ; Nerve Sheath Neoplasms/*genetics/*pathology ; Nerve Tissue Proteins/analysis/physiology ; Neurofibromatosis 1/*genetics/*pathology ; Neurofibromin 1 ; Proteins/analysis/physiology ; S100 Proteins/analysis ; Schwann Cells/chemistry/ultrastructure ; Stem Cells
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    Modulation of respiratory frequency by peptidergic input to rhythmogenic neurons in the preBotzinger complex (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-11-24
    Description: Neurokinin-1 receptor (NK1R) and mu-opioid receptor (muOR) agonists affected respiratory rhythm when injected directly into the preBotzinger Complex (preBotC), the hypothesized site for respiratory rhythmogenesis in mammals. These effects were mediated by actions on preBotC rhythmogenic neurons. The distribution of NK1R+ neurons anatomically defined the preBotC. Type 1 neurons in the preBotC, which have rhythmogenic properties, expressed both NK1Rs and muORs, whereas type 2 neurons expressed only NK1Rs. These findings suggest that the preBotC is a definable anatomic structure with unique physiological function and that a subpopulation of neurons expressing both NK1Rs and muORs generate respiratory rhythm and modulate respiratory frequency.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2811082/" 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/PMC2811082/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gray, P A -- Rekling, J C -- Bocchiaro, C M -- Feldman, J L -- HL37941/HL/NHLBI NIH HHS/ -- HL40959/HL/NHLBI NIH HHS/ -- R01 HL040959/HL/NHLBI NIH HHS/ -- R01 HL040959-12/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 19;286(5444):1566-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, University of California Los Angeles, Box 951763, Los Angeles, CA 90095-1763, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10567264" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Enkephalin, Ala(2)-MePhe(4)-Gly(5)-/pharmacology ; Female ; In Vitro Techniques ; Medulla Oblongata/cytology/drug effects/*physiology ; Mice ; Mice, Inbred BALB C ; Neurons/chemistry/drug effects/*physiology ; Rats ; Rats, Sprague-Dawley ; Receptors, GABA-B/analysis/physiology ; Receptors, Neurokinin-1/agonists/analysis/*physiology ; Receptors, Opioid, mu/agonists/analysis/*physiology ; Respiratory Mechanics/drug effects/*physiology ; Substance P/pharmacology ; Synaptic Transmission/drug effects
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    Selfish sentinels in cooperative mammals (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-05
    Description: Like humans engaged in risky activities, group members of some animal societies take turns acting as sentinels. Explanations of the evolution of sentinel behavior have frequently relied on kin selection or reciprocal altruism, but recent models suggest that guarding may be an individual's optimal activity once its stomach is full if no other animal is on guard. This paper provides support for this last explanation by showing that, in groups of meerkats (Suricata suricatta), animals guard from safe sites, and solitary individuals as well as group members spend part of their time on guard. Though individuals seldom take successive guarding bouts, there is no regular rota, and the provision of food increases contributions to guarding and reduces the latency between bouts by the same individual.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clutton-Brock, T H -- O'Riain, M J -- Brotherton, P N -- Gaynor, D -- Kansky, R -- Griffin, A S -- Manser, M -- New York, N.Y. -- Science. 1999 Jun 4;284(5420):1640-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Large Animal Research Group, Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK. thcb@hermes.cam.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10356387" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Behavior, Animal ; *Cooperative Behavior ; Feeding Behavior ; Female ; *Herpestidae ; Male ; Nutritional Status
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    Gene defect linked to Rett syndrome (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gura, T -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):27.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10532886" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Chromosomal Proteins, Non-Histone ; Chromosome Mapping ; DNA-Binding Proteins/*genetics ; Female ; *Gene Expression Regulation ; Humans ; Male ; Methyl-CpG-Binding Protein 2 ; Mice ; Mice, Knockout ; Mutation ; Repressor Proteins/*genetics ; Rett Syndrome/*genetics ; X Chromosome/*genetics
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    Variability in spike trains during constant and dynamic stimulation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-19
    Description: In a recent study, it was concluded that natural time-varying stimuli are represented more reliably in the brain than constant stimuli are. The results presented here disagree with this conclusion, although they were obtained from the same identified neuron (H1) in the fly's visual system. For large parts of the neuron's activity range, the variability of the responses was very similar for constant and time-varying stimuli and was considerably smaller than that in many visual interneurons of vertebrates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warzecha, A K -- Egelhaaf, M -- New York, N.Y. -- Science. 1999 Mar 19;283(5409):1927-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lehrstuhl fur Neurobiologie, Fakultat fur Biologie, Universitat Bielefeld, Postfach 10 01 31, D-33501 Bielefeld, Germany. ak.warzecha@biologie.uni-bielefeld.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10082467" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Brain/physiology ; Diptera/*physiology ; Female ; Motion Perception ; Neurons/*physiology ; Photic Stimulation ; Time Factors ; Visual Pathways
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    Stimulation of bone formation in vitro and in rodents by statins (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-12-03
    Description: Osteoporosis and other diseases of bone loss are a major public health problem. Here it is shown that the statins, drugs widely used for lowering serum cholesterol, also enhance new bone formation in vitro and in rodents. This effect was associated with increased expression of the bone morphogenetic protein-2 (BMP-2) gene in bone cells. Lovastatin and simvastatin increased bone formation when injected subcutaneously over the calvaria of mice and increased cancellous bone volume when orally administered to rats. Thus, in appropriate doses, statins may have therapeutic applications for the treatment of osteoporosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mundy, G -- Garrett, R -- Harris, S -- Chan, J -- Chen, D -- Rossini, G -- Boyce, B -- Zhao, M -- Gutierrez, G -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1946-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉OsteoScreen, 2040 Babcock Road, San Antonio, TX 78229, USA. mundy@uthscsa.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10583956" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Density/*drug effects ; Bone Morphogenetic Protein 2 ; Bone Morphogenetic Proteins/biosynthesis/genetics/pharmacology ; Cell Line ; Female ; Fibroblast Growth Factor 1 ; Fibroblast Growth Factor 2/pharmacology ; Humans ; Hydroxymethylglutaryl-CoA Reductase Inhibitors/pharmacology ; Lovastatin/*pharmacology ; Male ; Mice ; Mice, Inbred ICR ; Organ Culture Techniques ; Osteoblasts/*drug effects/metabolism ; Osteoclasts/drug effects ; Osteogenesis/*drug effects ; Osteoporosis/drug therapy ; Ovariectomy ; Promoter Regions, Genetic/drug effects ; Rats ; Recombinant Proteins/pharmacology ; Simvastatin/*pharmacology ; Skull ; Transfection ; *Transforming Growth Factor beta
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    Genetic mechanisms of age regulation of human blood coagulation factor IX (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-31
    Description: Blood coagulation capacity increases with age in healthy individuals. Through extensive longitudinal analyses of human factor IX gene expression in transgenic mice, two essential age-regulatory elements, AE5' and AE3', have been identified. These elements are required and together are sufficient for normal age regulation of factor IX expression. AE5', a PEA-3 related element present in the 5' upstream region of the gene encoding factor IX, is responsible for age-stable expression of the gene. AE3', in the middle of the 3' untranslated region, is responsible for age-associated elevation in messenger RNA levels. In a concerted manner, AE5' and AE3' recapitulate natural patterns of the advancing age-associated increase in factor IX gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kurachi, S -- Deyashiki, Y -- Takeshita, J -- Kurachi, K -- AG13283/AG/NIA NIH HHS/ -- HL38644/HL/NHLBI NIH HHS/ -- HL53713/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):739-43.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI 48109-0618, USA. kkurachi@umich.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10426997" target="_blank"〉PubMed〈/a〉
    Keywords: *3' Untranslated Regions ; Aging/blood/*genetics ; Animals ; Consensus Sequence ; DNA Footprinting ; Dinucleotide Repeats ; Factor IX/*genetics/metabolism ; Female ; *Gene Expression Regulation ; Genetic Vectors ; Humans ; Male ; Mice ; Mice, Transgenic ; RNA, Messenger/genetics/metabolism ; *Regulatory Sequences, Nucleic Acid ; Transcription Factors/genetics/metabolism ; Transcription, Genetic ; Tumor Cells, Cultured
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    Cheap treatment cuts HIV transmission (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-03-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 1999 Feb 12;283(5404):916-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10075556" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Anti-HIV Agents/*therapeutic use ; *Controlled Clinical Trials as Topic ; Drug Therapy, Combination ; Ethics, Medical ; Female ; HIV Infections/drug therapy/prevention & control/*transmission ; Humans ; Infant, Newborn ; Infectious Disease Transmission, Vertical/*prevention & control ; Labor, Obstetric ; Lamivudine/therapeutic use ; Placebos ; Pregnancy ; Pregnancy Complications, Infectious/*drug therapy ; Zidovudine/therapeutic use
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    In contrast to Dolly, cloning resets telomere clock in cattle (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-05-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2000 Apr 28;288(5466):586-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10798984" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/genetics ; Animals ; Bioethics ; Cattle/*genetics ; *Cell Aging/genetics ; Cell Division ; Cells, Cultured ; *Cloning, Organism ; Female ; Nuclear Transfer Techniques ; Oocytes/physiology ; Stem Cells ; Telomere/*ultrastructure
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    Black-footed ferret recovery (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-06-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dobson, A -- Lyles, A -- New York, N.Y. -- Science. 2000 May 12;288(5468):985-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolutionary Biology, Princeton University, NJ 08544, USA. andy@eno.princeton.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10841720" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Husbandry ; Animals ; Animals, Zoo ; Breeding ; *Conservation of Natural Resources ; Female ; *Ferrets/genetics/physiology ; Founder Effect ; Genetics, Population ; Male ; Northwestern United States ; Predatory Behavior ; Sciuridae ; Southwestern United States
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    Epidemiology. Duke study faults overuse of stimulants for children (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-08-19
    Description: Some experts are growing concerned that Ritalin, a stimulant of the central nervous system used to calm a type of fidgety behavior called "attention-deficit hyperactivity disorder" (ADHD), is overused. Most psychiatrists think, however, that stimulants are being underprescribed, because too many cases of ADHD are going untreated. Now, an authoritative study published in this month's Journal of the American Academy of Child and Adolescent Psychiatry shows that Ritalin is being given to many children who don't fit the diagnosis of ADHD, while others who do are not receiving the drug.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 2000 Aug 4;289(5480):721.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10950713" target="_blank"〉PubMed〈/a〉
    Keywords: Attention Deficit Disorder with Hyperactivity/*diagnosis/*drug ; therapy/epidemiology ; Central Nervous System Stimulants/*therapeutic use ; Child ; Drug Utilization ; Female ; Humans ; Male ; Methylphenidate/*therapeutic use ; United States/epidemiology
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    Study of HIV transmission sparks ethics debate (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-04-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2000 Apr 7;288(5463):22-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10766625" target="_blank"〉PubMed〈/a〉
    Keywords: Anti-Bacterial Agents/therapeutic use ; Anti-HIV Agents/therapeutic use ; Clinical Trials as Topic/*standards ; *Disclosure ; Disease Transmission, Infectious ; *Ethics, Medical ; Female ; HIV Infections/drug therapy/*transmission/*virology ; HIV-1/*physiology ; Humans ; Male ; Moral Obligations ; Publishing ; Research Subjects ; *Sexual Partners ; Uganda ; Viral Load
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    Cooperative regulation of cell polarity and growth by Drosophila tumor suppressors (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-07
    Description: Loss of cell polarity and tissue architecture are characteristics of malignant cancers derived from epithelial tissues. We provide evidence from Drosophila that a group of membrane-associated proteins act in concert to regulate both epithelial structure and cell proliferation. Scribble (Scrib) is a cell junction-localized protein required for polarization of embryonic and, as demonstrated here, imaginal disc and follicular epithelia. We show that the tumor suppressors lethal giant larvae (lgl) and discs-large (dlg) have identical effects on all three epithelia, and that scrib also acts as a tumor suppressor. Scrib and Dlg colocalize and overlap with Lgl in epithelia; activity of all three genes is required for cortical localization of Lgl and junctional localization of Scrib and Dlg. scrib, dlg, and lgl show strong genetic interactions. Our data indicate that the three tumor suppressors act together in a common pathway to regulate cell polarity and growth control.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bilder, D -- Li, M -- Perrimon, N -- New York, N.Y. -- Science. 2000 Jul 7;289(5476):113-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics and Howard Hughes Medical Institute, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA. bilder@rascal.med.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10884224" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division ; Cell Membrane/metabolism ; *Cell Polarity ; Cell Transformation, Neoplastic ; Cytoplasm/metabolism ; Drosophila/*cytology/genetics/growth & development ; *Drosophila Proteins ; Embryo, Nonmammalian/cytology ; Epidermis/embryology/metabolism/ultrastructure ; Epithelial Cells/cytology/metabolism ; Female ; Genes, Insect ; *Genes, Tumor Suppressor ; Insect Proteins/genetics/*metabolism ; Intercellular Junctions/metabolism/ultrastructure ; Membrane Proteins/genetics/*metabolism ; Morphogenesis ; Mutation ; Phenotype ; *Tumor Suppressor Proteins
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Extension of cell life-span and telomere length in animals cloned from senescent somatic cells (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-04-28
    Description: 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〉
    Keywords: 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
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Genetic polymorphism in CX3CR1 and risk of HIV disease (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McDermott, D H -- Colla, J S -- Kleeberger, C A -- Plankey, M -- Rosenberg, P S -- Smith, E D -- Zimmerman, P A -- Combadiere, C -- Leitman, S F -- Kaslow, R A -- Goedert, J J -- Berger, E A -- O'Brien, T R -- Murphy, P M -- 5-M01-RR-00052/RR/NCRR NIH HHS/ -- UO1-AI-35042/AI/NIAID NIH HHS/ -- UO1-AI-35043/AI/NIAID NIH HHS/ -- etc. -- New York, N.Y. -- Science. 2000 Dec 15;290(5499):2031.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, 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/11187812" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/genetics/physiopathology/virology ; Alleles ; Cohort Studies ; Disease Progression ; Female ; France ; HIV/physiology ; HIV Infections/*genetics/physiopathology/virology ; Haplotypes ; Homozygote ; Humans ; Male ; North America ; *Polymorphism, Single Nucleotide ; Receptors, Cytokine/*genetics/physiology ; Receptors, HIV/*genetics/physiology ; Risk Factors
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    The violence of the lambs (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-12
    Description: 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〉
    Keywords: 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
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Linkage of plasma Abeta42 to a quantitative locus on chromosome 10 in late-onset Alzheimer's disease pedigrees (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-12-23
    Description: Plasma Abeta42 (amyloid beta42 peptide) is invariably elevated in early-onset familial Alzheimer's disease (AD), and it is also increased in the first-degree relatives of patients with typical late-onset AD (LOAD). To detect LOAD loci that increase Abeta42, we used plasma Abeta42 as a surrogate trait and performed linkage analysis on extended AD pedigrees identified through a LOAD patient with extremely high plasma Abeta. Here, we report linkage to chromosome 10 with a maximal lod score of 3.93 at 81 centimorgans close to D10S1225. Remarkably, linkage to the same region was obtained independently in a genome-wide screen of LOAD sibling pairs. These results provide strong evidence for a novel LOAD locus on chromosome 10 that acts to increase Abeta.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ertekin-Taner, N -- Graff-Radford, N -- Younkin, L H -- Eckman, C -- Baker, M -- Adamson, J -- Ronald, J -- Blangero, J -- Hutton, M -- Younkin, S G -- AG06656/AG/NIA NIH HHS/ -- MH59490/MH/NIMH NIH HHS/ -- P50 AG16574/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2000 Dec 22;290(5500):2303-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Mayo Clinic Jacksonville, Jacksonville, FL 32224, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11125143" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Age of Onset ; Aged ; Aged, 80 and over ; Alzheimer Disease/*blood/*genetics ; Amyloid beta-Peptides/*blood/genetics ; Chromosomes, Human, Pair 10/*genetics ; Female ; *Genetic Linkage ; Genetic Markers ; Genetic Predisposition to Disease ; Humans ; Lod Score ; Male ; Middle Aged ; Pedigree ; Peptide Fragments/*blood/genetics ; Phenotype ; *Quantitative Trait, Heritable
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Molecular biology. RNA interference (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-04-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sharp, P A -- Zamore, P D -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2431-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. sharppa@mit.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10766620" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/*genetics ; *Caenorhabditis elegans Proteins ; *DNA Transposable Elements ; Female ; *Gene Expression Regulation ; *Gene Silencing ; Genes, Helminth ; Helminth Proteins/genetics/physiology ; Male ; Mutation ; RNA, Double-Stranded/*genetics ; RNA, Helminth/*genetics/metabolism ; RNA, Messenger/*genetics/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Correlates of sleep and waking in Drosophila melanogaster (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-10
    Description: Drosophila exhibits a circadian rest-activity cycle, but it is not known whether fly rest constitutes sleep or is mere inactivity. It is shown here that, like mammalian sleep, rest in Drosophila is characterized by an increased arousal threshold and is homeostatically regulated independently of the circadian clock. As in mammals, rest is abundant in young flies, is reduced in older flies, and is modulated by stimulants and hypnotics. Several molecular markers modulated by sleep and waking in mammals are modulated by rest and activity in Drosophila, including cytochrome oxidase C, the endoplasmic reticulum chaperone protein BiP, and enzymes implicated in the catabolism of monoamines. Flies lacking one such enzyme, arylalkylamine N-acetyltransferase, show increased rest after rest deprivation. These results implicate the catabolism of monoamines in the regulation of sleep and waking in the fly and suggest that Drosophila may serve as a model system for the genetic dissection of sleep.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shaw, P J -- Cirelli, C -- Greenspan, R J -- Tononi, G -- New York, N.Y. -- Science. 2000 Mar 10;287(5459):1834-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Neurosciences Institute, 10640 John Jay Hopkins Drive, San Diego, CA 92121, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10710313" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arylamine N-Acetyltransferase/genetics/metabolism ; Behavior, Animal/drug effects ; Biogenic Monoamines/metabolism ; Caffeine/pharmacology ; Carrier Proteins/genetics/metabolism ; Circadian Rhythm/*physiology ; Cytochrome P-450 Enzyme System/genetics/metabolism ; *Drosophila Proteins ; Drosophila melanogaster/drug effects/genetics/*physiology ; Fatty Acid Synthases/genetics/metabolism ; Female ; Gene Dosage ; Gene Expression Profiling ; Genes, Insect ; HSC70 Heat-Shock Proteins ; *HSP70 Heat-Shock Proteins ; Homeostasis ; Hydroxyzine/pharmacology ; Mutation ; Rest/physiology ; Sleep/drug effects/*physiology ; Transcription, Genetic ; Wakefulness/drug effects/physiology
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    Demography. A billion and counting: China's tricky census (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: Census officials are trying to keep politics out of the world's biggest enumeration as for the first time they gather additional data on mobility, fertility, and other sensitive demographic indicators. The government has repeatedly proclaimed that the information will remain confidential and that the census won't be used as an excuse to send migrants back to their hometowns, but rising expectations of privacy have become a problem for the government in this year's enumeration. More than accuracy is at stake: The wrong numbers could have political ramifications if they raise questions about compliance with such policies as the one-child-per-family rule.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walfish, D -- New York, N.Y. -- Science. 2000 Nov 17;290(5495):1288-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11185400" target="_blank"〉PubMed〈/a〉
    Keywords: *Censuses ; China ; Female ; Government ; Humans ; Male ; Mortality ; Population Control ; *Population Density ; Privacy ; Sex Ratio ; Transients and Migrants
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Preventing cervical cancer (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-06
    Description: The Pap smear has been the classic screening strategy for preventing cervical cancer for 50 years. The finding that infection with human papillomavirus is associated with an increased risk of cervical cancer has prompted the development of new strategies for cervical cancer screening and prevention. In their Policy Forum, Cain and Howett discuss the introduction of HPV testing, anti-HPV microbicidal agents and vaccination against HPV. They point out the benefits but also the potential for over and under treatment and the need for considerable improvements in public education.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cain, J M -- Howett, M K -- New York, N.Y. -- Science. 2000 Jun 9;288(5472):1753-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departments of Obstetrics and Gynecology, The Pennsylvania State University, College of Medicine MB103 HOSPITAL, Hershey, PA 17033, USA.jcain@psghs.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10877694" target="_blank"〉PubMed〈/a〉
    Keywords: Antiviral Agents/therapeutic use ; Cost-Benefit Analysis ; False Positive Reactions ; Female ; Humans ; Mass Screening ; *Papillomaviridae/immunology/isolation & purification/pathogenicity ; *Papillomavirus Infections/complications/diagnosis/drug therapy/prevention & ; control ; *Tumor Virus Infections/complications/diagnosis/drug therapy/prevention & control ; Uterine Cervical Neoplasms/diagnosis/*prevention & control/*virology ; Viral Vaccines
    Print ISSN: 0036-8075
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    Women's health. Reports see progress, problems, in trials (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-06-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Helmuth, L -- New York, N.Y. -- Science. 2000 Jun 2;288(5471):1562-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10858128" target="_blank"〉PubMed〈/a〉
    Keywords: *Clinical Trials as Topic ; Female ; Financing, Government ; Humans ; Male ; National Institutes of Health (U.S.) ; Publishing ; *Research Subjects ; Research Support as Topic ; *Sex Characteristics ; United States ; *Women's Health
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    Society of Vertebrate Paleontology. Fossils come to life in Mexico (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: New insights into ancient life came by land and sea at the 60th annual meeting of the Society of Vertebrate Paleontology, held here from 25 to 28 October. Stunningly preserved fossils from Mongolia gave contrasting views of dinosaur family life, while biomechanical models clocked the swimming speed of cruising ichthyosaurs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stokstad, E -- New York, N.Y. -- Science. 2000 Dec 1;290(5497):1675.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11186387" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; *Fossils ; Maternal Behavior ; Models, Biological ; Mongolia ; *Reptiles/physiology ; Swimming
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    Cross-species interactions between malaria parasites in humans (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-02-05
    Description: The dynamics of multiple Plasmodium infections in asymptomatic children living under intense malaria transmission pressure provide evidence for a density-dependent regulation that transcends species as well as genotype. This regulation, in combination with species- and genotype-specific immune responses, results in nonindependent, sequential episodes of infection with each species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bruce, M C -- Donnelly, C A -- Alpers, M P -- Galinski, M R -- Barnwell, J W -- Walliker, D -- Day, K P -- AI24710/AI/NIAID NIH HHS/ -- AI37545/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2000 Feb 4;287(5454):845-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Wellcome Trust Centre for the Epidemiology of Infectious Disease, Department of Zoology, University of Oxford, Oxford, OX1 3FY, UK. marian.bruce@ceid.ox.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10657296" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Animals ; Child ; Child, Preschool ; Female ; Genotype ; Humans ; Malaria/immunology/*parasitology ; Malaria Vaccines ; Male ; Papua New Guinea ; Parasitemia/*parasitology ; Plasmodium/genetics/*physiology ; Plasmodium falciparum/physiology ; Plasmodium malariae/physiology ; Plasmodium vivax/physiology ; Species Specificity
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Evolution and immunology. The economics of immunity (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: Our vigilant immune systems are ready to mount an attack as soon as an invading pathogen is spotted. But what is the cost of keeping this sophisticated defense system on red alert? In a provocative Perspective, Read and Allen discuss new findings showing that the cost of immune defense in animals is very high (Moret and Schmid-Hempel), and the claim that, in some circumstances, the cost may be worth the benefit gained (Nunn et al.).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Read, A F -- Allen, J E -- New York, N.Y. -- Science. 2000 Nov 10;290(5494):1104-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Cell, Animal and Population Biology, University of Edinburgh, Edinburgh EH9 3JT, UK. a.read@ed.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11185007" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bees/*immunology ; *Biological Evolution ; Female ; *Immunity ; Immunity, Active ; Immunity, Cellular ; Immunity, Innate ; Leukocyte Count ; Male ; Primate Diseases/immunology ; Primates/*immunology ; Selection, Genetic ; Sexual Behavior, Animal ; Sexually Transmitted Diseases/immunology/veterinary ; Species Specificity
    Print ISSN: 0036-8075
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    Genes expressed in human tumor endothelium (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-19
    Description: 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〉
    Keywords: 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
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    A critical role for murine complement regulator crry in fetomaternal tolerance (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-22
    Description: 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〉
    Keywords: 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
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Turning blood into brain: cells bearing neuronal antigens generated in vivo from bone marrow (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-12-02
    Description: Bone marrow stem cells give rise to a variety of hematopoietic lineages and repopulate the blood throughout adult life. We show that, in a strain of mice incapable of developing cells of the myeloid and lymphoid lineages, transplanted adult bone marrow cells migrated into the brain and differentiated into cells that expressed neuron-specific antigens. These findings raise the possibility that bone marrow-derived cells may provide an alternative source of neurons in patients with neurodegenerative diseases or central nervous system injury.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mezey, E -- Chandross, K J -- Harta, G -- Maki, R A -- McKercher, S R -- AI30656/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2000 Dec 1;290(5497):1779-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Basic Neuroscience Program, Laboratory of Developmental Neurogenetics, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA. mezey@codon.nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11099419" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens/analysis ; Biomarkers/analysis ; Bone Marrow Cells/*cytology/physiology ; *Bone Marrow Transplantation ; Brain/*cytology ; Cell Differentiation ; Cell Movement ; Female ; Immunoenzyme Techniques ; Intermediate Filament Proteins/analysis ; Male ; Mice ; Mice, Knockout ; Microscopy, Confocal ; Nerve Tissue Proteins/analysis/immunology ; Nestin ; Neurons/chemistry/*cytology/immunology ; Phosphopyruvate Hydratase/analysis ; *Stem Cell Transplantation ; Stem Cells/chemistry/*cytology ; Y Chromosome
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    Natural selection and the reinforcement of mate recognition (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-10-20
    Description: Natural selection on mate recognition may often contribute to speciation, resulting in reproductive character displacement. Field populations of Drosophila serrata display reproductive character displacement in cuticular hydrocarbons when sympatric with Drosophila birchii. We exposed field sympatric and allopatric populations of D. serrata to experimental sympatry with D. birchii for nine generations. Cuticular hydrocarbons of field allopatric D. serrata populations evolved to resemble the field sympatric populations, whereas field sympatric D. serrata populations remained unchanged. Our experiment indicates that natural selection on mate recognition resulted in the field pattern of reproductive character displacement.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Higgie, M -- Chenoweth, S -- Blows, M W -- New York, N.Y. -- Science. 2000 Oct 20;290(5491):519-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology and Entomology, University of Queensland, St. Lucia 4072, Australia. MHiggie@zoology.uq.edu.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11039933" target="_blank"〉PubMed〈/a〉
    Keywords: Analysis of Variance ; Animals ; Australia ; *Biological Evolution ; Discriminant Analysis ; Drosophila/chemistry/*genetics/*physiology ; *Ecosystem ; Female ; Genetic Variation ; Hydrocarbons/analysis ; Male ; Pheromones/analysis ; Reproduction ; *Selection, Genetic ; Sexual Behavior, Animal
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    Social science. Stress: the invisible hand in Eastern Europe's death rates (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-06
    Description: The end of communism opened up a life of economic uncertainty in the Eastern Bloc. And that, say some social scientists, may be exerting a deadly effect on residents, whose high expectations that their lives would improve were quickly dashed by the bumpy transition to a market economy. Disillusionment led to stress and depression, and depression was a harbinger of death.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stone, R -- New York, N.Y. -- Science. 2000 Jun 9;288(5472):1732-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10877687" target="_blank"〉PubMed〈/a〉
    Keywords: Communism ; Coronary Disease/etiology/*mortality/psychology ; Depression/complications/*epidemiology ; Europe, Eastern ; Female ; Humans ; Life Expectancy ; Male ; *Mortality ; *Political Systems ; Risk Factors ; *Social Change ; Stress, Psychological/complications/*epidemiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Similar requirements of a plant symbiont and a mammalian pathogen for prolonged intracellular survival (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-31
    Description: 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〉
    Keywords: 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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    Hematopoietic stem cell quiescence maintained by p21cip1/waf1 (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-10
    Description: Relative quiescence is a defining characteristic of hematopoietic stem cells, while their progeny have dramatic proliferative ability and inexorably move toward terminal differentiation. The quiescence of stem cells has been conjectured to be of critical biologic importance in protecting the stem cell compartment, which we directly assessed using mice engineered to be deficient in the G1 checkpoint regulator, cyclin-dependent kinase inhibitor, p21cip1/waf1 (p21). In the absence of p21, hematopoietic stem cell proliferation and absolute number were increased under normal homeostatic conditions. Exposing the animals to cell cycle-specific myelotoxic injury resulted in premature death due to hematopoietic cell depletion. Further, self-renewal of primitive cells was impaired in serially transplanted bone marrow from p21-/- mice, leading to hematopoietic failure. Therefore, p21 is the molecular switch governing the entry of stem cells into the cell cycle, and in its absence, increased cell cycling leads to stem cell exhaustion. Under conditions of stress, restricted cell cycling is crucial to prevent premature stem cell depletion and hematopoietic death.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cheng, T -- Rodrigues, N -- Shen, H -- Yang, Y -- Dombkowski, D -- Sykes, M -- Scadden, D T -- AI07387/AI/NIAID NIH HHS/ -- DK50234/DK/NIDDK NIH HHS/ -- HL44851/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 2000 Mar 10;287(5459):1804-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Experimental Hematology, AIDS Research Center, Massachusetts General Hospital Cancer Center, Transplantation Biology Research Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10710306" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antimetabolites/pharmacology ; Blood Cell Count ; Bone Marrow Transplantation ; Cell Count ; *Cell Cycle ; Cell Death ; Cell Differentiation ; Cell Division ; Coculture Techniques ; Colony-Forming Units Assay ; Cyclin-Dependent Kinase Inhibitor p21 ; Cyclins/genetics/*physiology ; Female ; Fluorouracil/pharmacology ; *Hematopoiesis ; Hematopoietic Stem Cells/*cytology/drug effects/physiology ; Homeostasis ; Male ; Mice ; Mice, Inbred Strains
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    Therapeutic approaches to bone diseases (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-09-01
    Description: The strength and integrity of our bones depends on maintaining a delicate balance between bone resorption by osteoclasts and bone formation by osteoblasts. As we age or as a result of disease, this delicate balancing act becomes tipped in favor of osteoclasts so that bone resorption exceeds bone formation, rendering bones brittle and prone to fracture. A better understanding of the biology of osteoclasts and osteoblasts is providing opportunities for developing therapeutics to treat diseases of bone. Drugs that inhibit the formation or activity of osteoclasts are valuable for treating osteoporosis, Paget's disease, and inflammation of bone associated with rheumatoid arthritis or periodontal disease. Far less attention has been paid to promoting bone formation with, for example, growth factors or hormones, an approach that would be a valuable adjunct therapy for patients receiving inhibitors of bone resorption.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rodan, G A -- Martin, T J -- New York, N.Y. -- Science. 2000 Sep 1;289(5484):1508-14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Merck Research Laboratories, West Point, PA 19486, USA. St. Vincent's Institute of Medical Research, Melbourne 3065, Australia. gideon_rodan@merck.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10968781" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Diseases/*drug therapy/genetics/physiopathology/therapy ; Bone Resorption/drug therapy ; Calcitonin/therapeutic use ; Diphosphonates/therapeutic use ; Estrogen Receptor Modulators/therapeutic use ; Estrogens/therapeutic use ; Female ; Genetic Therapy ; Growth Substances/therapeutic use ; Humans ; Male ; Osteoclasts/drug effects ; Osteogenesis/drug effects ; Osteoporosis/*drug therapy/genetics/physiopathology/therapy ; Parathyroid Hormone/therapeutic use
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    Dual signaling regulated by calcyon, a D1 dopamine receptor interacting protein (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-04
    Description: The synergistic response of cells to the stimulation of multiple receptors has been ascribed to receptor cross talk; however, the specific molecules that mediate the resultant signal amplification have not been defined. Here a 24-kilodalton single transmembrane protein, designated calcyon, we functionally characterize that interacts with the D1 dopamine receptor. Calcyon localizes to dendritic spines of D1 receptor-expressing pyramidal cells in prefrontal cortex. These studies delineate a mechanism of Gq- and Gs-coupled heterotrimeric GTP-binding protein-coupled receptor cross talk by which D1 receptors can shift effector coupling to stimulate robust intracellular calcium (Ca2+i) release as a result of interaction with calcyon. The role of calcyon in potentiating Ca2+-dependent signaling should provide insight into the D1 receptor-modulated cognitive functions of prefrontal cortex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lezcano, N -- Mrzljak, L -- Eubanks, S -- Levenson, R -- Goldman-Rakic, P -- Bergson, C -- MH56608/MH/NIMH NIH HHS/ -- P50 MH068789/MH/NIMH NIH HHS/ -- P50 MH44866/MH/NIMH NIH HHS/ -- R01 MH063271/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2000 Mar 3;287(5458):1660-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta, GA 30912-2300, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10698743" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Benzazepines/pharmacology ; Brain/cytology/metabolism ; Calcium/metabolism ; Calcium Signaling ; Cell Line ; Cyclic AMP/metabolism ; Dendrites/chemistry/metabolism ; Dopamine Agonists/pharmacology ; Female ; Heterotrimeric GTP-Binding Proteins/metabolism ; Humans ; Macaca mulatta ; Membrane Proteins/analysis/chemistry/genetics/*metabolism ; Molecular Sequence Data ; Prefrontal Cortex/cytology/*metabolism ; Pyramidal Cells/chemistry/*metabolism ; Rabbits ; *Receptor Cross-Talk ; Receptors, Dopamine D1/analysis/*metabolism ; Receptors, Neurotransmitter/metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Two-Hybrid System Techniques
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    Extended life-span conferred by cotransporter gene mutations in Drosophila (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-12-16
    Description: Aging is genetically determined and environmentally modulated. In a study of longevity in the adult fruit fly, Drosophila melanogaster, we found that five independent P-element insertional mutations in a single gene resulted in a near doubling of the average adult life-span without a decline in fertility or physical activity. Sequence analysis revealed that the product of this gene, named Indy (for I'm not dead yet), is most closely related to a mammalian sodium dicarboxylate cotransporter-a membrane protein that transports Krebs cycle intermediates. Indy was most abundantly expressed in the fat body, midgut, and oenocytes: the principal sites of intermediary metabolism in the fly. Excision of the P element resulted in a reversion to normal life-span. These mutations may create a metabolic state that mimics caloric restriction, which has been shown to extend life-span.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rogina, B -- Reenan, R A -- Nilsen, S P -- Helfand, S L -- AG14532/AG/NIA NIH HHS/ -- AG16667/AG/NIA NIH HHS/ -- R37 AG016667/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2000 Dec 15;290(5499):2137-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics and Developmental Biology, School of Medicine, University of Connecticut Health Center, 263 Farmington Avenue, Farmington CT 06030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11118146" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/*genetics ; Amino Acid Sequence ; Animals ; Behavior, Animal ; Biological Transport ; Carrier Proteins/chemistry/*genetics/metabolism ; Crosses, Genetic ; DNA Transposable Elements ; *Dicarboxylic Acid Transporters ; Digestive System/metabolism ; *Drosophila Proteins ; Drosophila melanogaster/*genetics/metabolism/physiology ; Energy Intake ; Energy Metabolism ; Fat Body/metabolism ; Female ; Fertility ; Gene Expression ; *Genes, Insect ; Longevity/*genetics ; Male ; Membrane Proteins/chemistry/metabolism ; Molecular Sequence Data ; Mutagenesis, Insertional ; Mutagenesis, Site-Directed ; *Organic Anion Transporters, Sodium-Dependent ; Sense Organs/cytology/metabolism ; Sequence Homology, Amino Acid ; *Symporters
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    The initial domestication of goats (Capra hircus) in the Zagros mountains 10,000 years ago (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-24
    Description: Initial goat domestication is documented in the highlands of western Iran at 10,000 calibrated calendar years ago. Metrical analyses of patterns of sexual dimorphism in modern wild goat skeletons (Capra hircus aegagrus) allow sex-specific age curves to be computed for archaeofaunal assemblages. A distinct shift to selective harvesting of subadult males marks initial human management and the transition from hunting to herding of the species. Direct accelerator mass spectrometry radiocarbon dates on skeletal elements provide a tight temporal context for the transition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zeder, M A -- Hesse, B -- New York, N.Y. -- Science. 2000 Mar 24;287(5461):2254-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Archaeobiology Program, Department of Anthropology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560-0112, USA. zeder.melinda@nmnh.si.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10731145" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animal Husbandry/*history ; Animals ; *Animals, Domestic/anatomy & histology/physiology ; Animals, Wild/anatomy & histology ; Archaeology ; Body Constitution ; Bone and Bones/anatomy & histology ; Climate ; Female ; *Goats/anatomy & histology/physiology ; History, Ancient ; Humans ; Iran ; Iraq ; Male ; Mass Spectrometry ; Sex Characteristics
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    Requirement for RORgamma in thymocyte survival and lymphoid organ development (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-06
    Description: Most developing thymocytes undergo apoptosis because they cannot interact productively with molecules encoded by the major histocompatibility complex. Here, we show that mice lacking the orphan nuclear hormone receptor RORgamma lose thymic expression of the anti-apoptotic factor Bcl-xL. RORgamma thus regulates the survival of CD4+8+ thymocytes and may control the temporal window during which thymocytes can undergo positive selection. RORgamma was also required for development of lymph nodes and Peyer's patches, but not splenic follicles. In its absence, there was loss of a population of CD3-CD4+CD45+ cells that normally express RORgamma and that are likely early progenitors of lymphoid organs. Hence, RORgamma has critical functions in T cell repertoire selection and lymphoid organogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, Z -- Unutmaz, D -- Zou, Y R -- Sunshine, M J -- Pierani, A -- Brenner-Morton, S -- Mebius, R E -- Littman, D R -- New York, N.Y. -- Science. 2000 Jun 30;288(5475):2369-73.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Pathogenesis Program, Skirball Institute of Biomolecular Medicine and Howard Hughes Medical Institute, New York University School of Medicine, New York, NY 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10875923" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; *CDC2-CDC28 Kinases ; Cell Count ; Cell Cycle ; Cell Survival ; Crosses, Genetic ; Cyclin-Dependent Kinase 2 ; Cyclin-Dependent Kinases/metabolism ; DNA-Binding Proteins/genetics/metabolism ; Female ; Gene Targeting ; Inhibitor of Differentiation Protein 2 ; Lymphoid Tissue/cytology/embryology/*growth & development ; Male ; Mice ; Mice, Inbred C57BL ; Nuclear Receptor Subfamily 1, Group F, Member 3 ; Protein-Serine-Threonine Kinases/metabolism ; Proto-Oncogene Proteins c-bcl-2/genetics/metabolism ; Receptors, Cytoplasmic and Nuclear/genetics/*physiology ; *Receptors, Retinoic Acid ; *Receptors, Thyroid Hormone ; *Repressor Proteins ; T-Lymphocyte Subsets/*cytology ; Thymus Gland/*cytology ; *Transcription Factors ; bcl-X Protein
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    Genetics. Reprogramming X inactivation (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: Inactivation of one of the two X chromosomes occurs in all cells of female adult mice so that genes are expressed from only one X chromosome. In a Perspective, Clerc and Avner describe an elegant series of experiments in mouse embryos cloned from adult and embryonic female cell nuclei (Eggan et al.) that reveal how the inactivation state of the X chromosomes is reprogrammed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clerc, P -- Avner, P -- New York, N.Y. -- Science. 2000 Nov 24;290(5496):1518-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉G|n|tique Mol|culaire Murine, Institut Pasteur, Paris 75015, France. pclerc@pasteur.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11185510" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cloning, Organism ; DNA Methylation ; *Dosage Compensation, Genetic ; Embryo, Mammalian/*metabolism ; Embryonic and Fetal Development ; Female ; *Genomic Imprinting ; Histones/metabolism ; Male ; Mice ; Nuclear Transfer Techniques ; Placenta/metabolism ; RNA, Long Noncoding ; RNA, Untranslated/genetics/metabolism ; Transcription Factors/genetics/metabolism ; Transgenes ; X Chromosome/*genetics/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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