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  • Male  (303)
  • Cell Line  (140)
  • Phenotype
  • American Association for the Advancement of Science (AAAS)  (502)
  • American Association of Petroleum Geologists (AAPG)
  • 2000-2004  (502)
  • 2001  (295)
  • 2000  (207)
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  • American Association for the Advancement of Science (AAAS)  (502)
  • American Association of Petroleum Geologists (AAPG)
  • Springer  (2)
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  • 2000-2004  (502)
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  • 1
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    Evolution. The benefits of allocating sex (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: Organisms allocate resources to male and female offspring in a process called sex allocation. In a Perspective, Stuart West and colleagues discuss what sex allocation tells us about evolution by natural selection and how sex allocation can be applied to understanding the mating structure of parasitic protozoans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉West, S A -- Herre, E A -- Sheldon, B C -- New York, N.Y. -- Science. 2000 Oct 13;290(5490):288-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Cell, Animal and Population Biology, University of Edinburgh, Edinburgh EH9 3JT, UK. stu.west@ed.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11183376" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Animals ; *Biological Evolution ; Female ; Inbreeding ; Insects/physiology ; Male ; Plasmodium/physiology ; Selection, Genetic ; *Sex Characteristics ; *Sex Ratio ; Sexual Behavior, Animal
    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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  • 2
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    Development. Survival is impossible without an editor (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: RNA editing is a fascinating phenomenon that is found in both animal and plant cells. By converting an adenosine base to an inosine (which behaves like guanosine) in RNA that has already been transcribed, certain RNA sequences (and hence the amino acids they encode) are altered. In a Perspective, Keegan, Gallo and O'Connell explore new results showing that activity of the editing enzyme ADAR1 is crucial for normal development of red blood cells in mouse embryos.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Keegan, L P -- Gallo, A -- O'Connell, M A -- New York, N.Y. -- Science. 2000 Dec 1;290(5497):1707-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Human Genetics Unit, Western General Hospital, Edinburgh EH4 2XU, UK. liam.keegan@hgu.mrc.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11186391" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine/metabolism ; Adenosine Deaminase/chemistry/*genetics/*metabolism ; Animals ; Base Pairing ; Central Nervous System/metabolism ; Chimera ; Drosophila/genetics/metabolism ; Embryo, Mammalian/cytology ; Embryo, Nonmammalian ; *Erythropoiesis ; Gene Dosage ; Hematopoietic Stem Cells/cytology/enzymology ; Inosine/metabolism ; Liver/metabolism ; Mice ; Mutation ; Phenotype ; Protein Structure, Tertiary ; *RNA Editing ; RNA Precursors/metabolism ; RNA, Double-Stranded/metabolism ; RNA-Binding Proteins ; Receptors, AMPA/genetics ; Stem Cells/cytology/enzymology ; Teratoma/genetics/pathology
    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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  • 3
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    Signal transduction. Are there close encounters between signaling pathways? (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Noselli, S -- Perrimon, N -- New York, N.Y. -- Science. 2000 Oct 6;290(5489):68-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut de Recherches, UMR 65643-CNRS, Parc Valrose 06108, Nice cedex 2 France. noselli@unice.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11183153" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drosophila/genetics/metabolism ; Gene Expression Profiling ; Humans ; Mutation ; Neoplasms/genetics/metabolism ; Phenotype ; *Receptor Cross-Talk ; *Signal Transduction
    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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  • 4
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    Tale of two kings (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sumen, C -- New York, N.Y. -- Science. 2001 Mar 16;291(5511):2093.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11256404" target="_blank"〉PubMed〈/a〉
    Keywords: *Aryl Hydrocarbon Hydroxylases ; Cytochrome P-450 CYP3A ; Cytochrome P-450 Enzyme System/metabolism ; History, Ancient ; Humans ; Male ; Oxidoreductases, N-Demethylating/metabolism ; Poisoning/history/prevention & control ; Sculpture/*history ; Turkey
    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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  • 5
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    Identification of critical staphylococcal genes using conditional phenotypes generated by antisense RNA (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-09-22
    Description: Comprehensive genomic analysis of the important human pathogen Staphylococcus aureus was achieved by a strategy involving antisense technology in a regulatable gene expression system. In addition to known essential genes, many genes of unknown or poorly defined biological function were identified. This methodology allowed gene function to be characterized in a comprehensive, defined set of conditionally growth-defective/lethal isogenic strains. Quantitative titration of the conditional growth effect was performed either in bacterial culture or in an animal model of infection. This genomic strategy offers an approach to the identification of staphylococcal gene products that could serve as targets for antibiotic discovery.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ji, Y -- Zhang, B -- Van, S F -- Horn -- Warren, P -- Woodnutt, G -- Burnham, M K -- Rosenberg, M -- New York, N.Y. -- Science. 2001 Sep 21;293(5538):2266-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, Genetics Research, GlaxoSmithKline Pharmaceuticals Research and Development, Collegeville, PA 19426, USA. yinduo_ji-1@gsk.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11567142" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cloning, Molecular ; Female ; *Gene Expression Regulation, Bacterial ; *Genes, Bacterial ; *Genes, Essential ; Genetic Vectors ; Mice ; Open Reading Frames ; Phenotype ; Pyelonephritis/microbiology ; *RNA, Antisense ; Staphylococcal Infections/microbiology ; Staphylococcus aureus/*genetics/growth & development/pathogenicity ; Transformation, Bacterial ; Virulence/genetics
    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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  • 6
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    DNA forensics. Laying ghosts to rest in Bosnia (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ladika, S -- New York, N.Y. -- Science. 2001 Aug 24;293(5534):1422-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11520964" target="_blank"〉PubMed〈/a〉
    Keywords: Bosnia and Herzegovina ; Cell Nucleus/genetics ; *DNA Fingerprinting ; DNA, Mitochondrial/genetics ; Family ; Female ; *Forensic Medicine ; Humans ; Male ; Sequence Analysis, DNA ; Warfare
    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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  • 7
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    Genomic and genetic definition of a functional human centromere (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-10-06
    Description: The definition of centromeres of human chromosomes requires a complete genomic understanding of these regions. Toward this end, we report integration of physical mapping, genetic, and functional approaches, together with sequencing of selected regions, to define the centromere of the human X chromosome and to explore the evolution of sequences responsible for chromosome segregation. The transitional region between expressed sequences on the short arm of the X and the chromosome-specific alpha satellite array DXZ1 spans about 450 kilobases and is satellite-rich. At the junction between this satellite region and canonical DXZ1 repeats, diverged repeat units provide direct evidence of unequal crossover as the homogenizing force of these arrays. Results from deletion analysis of mitotically stable chromosome rearrangements and from a human artificial chromosome assay demonstrate that DXZ1 DNA is sufficient for centromere function. Evolutionary studies indicate that, while alpha satellite DNA present throughout the pericentromeric region of the X chromosome appears to be a descendant of an ancestral primate centromere, the current functional centromere based on DXZ1 sequences is the product of the much more recent concerted evolution of this satellite DNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schueler, M G -- Higgins, A W -- Rudd, M K -- Gustashaw, K -- Willard, H F -- HD07518/HD/NICHD NIH HHS/ -- HD32111/HD/NICHD NIH HHS/ -- HG00107/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2001 Oct 5;294(5540):109-15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Case Western Reserve University School of Medicine and Center for Human Genetics, and, Research Institute, University Hospitals of Cleveland, Cleveland, OH 44106, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11588252" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cell Line ; Centromere/chemistry/genetics/*physiology ; Chromosome Segregation ; Chromosomes, Artificial, Bacterial ; Chromosomes, Artificial, Human ; Computer Simulation ; Contig Mapping ; Crossing Over, Genetic ; *DNA, Satellite/chemistry/genetics/physiology ; Evolution, Molecular ; Humans ; Interspersed Repetitive Sequences ; Models, Genetic ; Phylogeny ; Repetitive Sequences, Nucleic Acid ; Restriction Mapping ; Sequence Analysis, DNA ; Sequence Deletion ; Sequence Tagged Sites ; Transfection ; Turner Syndrome/genetics ; X Chromosome/genetics/*physiology/ultrastructure
    Print ISSN: 0036-8075
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  • 8
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    Interaction of the response regulator ARR4 with phytochrome B in modulating red light signaling (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-03
    Description: The Arabidopsis thaliana response regulator 4, expressed in response to phytochrome B action, specifically interacts with the extreme amino-terminus of the photoreceptor. The response regulator 4 stabilizes the active Pfr form of phytochrome B in yeast and in planta, thus elevates the level of the active photoreceptor in vivo. Accordingly, transgenic Arabidopsis plants overexpressing the response regulator 4 display hypersensitivity to red light but not to light of other wavelengths. We propose that the response regulator 4 acts as an output element of a two-component system that modulates red light signaling on the level of the phytochrome B photoreceptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sweere, U -- Eichenberg, K -- Lohrmann, J -- Mira-Rodado, V -- Baurle, I -- Kudla, J -- Nagy, F -- Schafer, E -- Harter, K -- New York, N.Y. -- Science. 2001 Nov 2;294(5544):1108-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut fur Biologie II / Botanik, Universitat Freiburg, Schanzlestrasse 1, 79104 Freiburg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11691995" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/genetics/*metabolism/radiation effects ; Arabidopsis Proteins/genetics/*metabolism ; Cell Nucleus/metabolism ; Cytoplasm/metabolism ; Darkness ; Genes, Plant ; *Light ; Phenotype ; Phosphorylation ; *Photoreceptor Cells ; Phytochrome/chemistry/*metabolism ; Phytochrome B ; Plants, Genetically Modified ; Protein Conformation ; Recombinant Fusion Proteins/metabolism ; *Signal Transduction ; *Transcription Factors ; Two-Hybrid System Techniques ; Yeasts/genetics/metabolism
    Print ISSN: 0036-8075
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  • 9
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    A transcriptional switch mediated by cofactor methylation (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-10
    Description: We describe a molecular switch based on the controlled methylation of nucleosome and the transcriptional cofactors, the CREB-binding proteins (CBP)/p300. The CBP/p300 methylation site is localized to an arginine residue that is essential for stabilizing the structure of the KIX domain, which mediates CREB recruitment. Methylation of KIX by coactivator-associated arginine methyltransferase 1 (CARM1) blocks CREB activation by disabling the interaction between KIX and the kinase inducible domain (KID) of CREB. Thus, CARM1 functions as a corepressor in cyclic adenosine monophosphate signaling pathway via its methyltransferase activity while acting as a coactivator for nuclear hormones. These results provide strong in vivo and in vitro evidence that histone methylation plays a key role in hormone-induced gene activation and define cofactor methylation as a new regulatory mechanism in hormone signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xu, W -- Chen, H -- Du, K -- Asahara, H -- Tini, M -- Emerson, B M -- Montminy, M -- Evans, R M -- 9R01DK57978/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2507-11. Epub 2001 Nov 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gene Expression Laboratory, Department of Biological Chemistry, University of California Davis Cancer Center/Basic Science, Sacramento, CA 95817, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11701890" target="_blank"〉PubMed〈/a〉
    Keywords: Acetyltransferases/metabolism ; Amino Acid Sequence ; Animals ; Apoptosis ; Cell Line ; Cyclic AMP Response Element-Binding Protein/metabolism ; Dimerization ; E1A-Associated p300 Protein ; *Gene Expression Regulation ; Genes, Reporter ; Histone Acetyltransferases ; Histones/metabolism ; Methylation ; Molecular Sequence Data ; Nerve Growth Factor/pharmacology ; Nuclear Proteins/chemistry/*metabolism ; PC12 Cells ; Protein Structure, Tertiary ; Protein-Arginine N-Methyltransferases/*metabolism ; Rats ; Receptors, Retinoic Acid/*metabolism ; Recombinant Fusion Proteins/metabolism ; Retinoid X Receptors ; *Saccharomyces cerevisiae Proteins ; Signal Transduction ; Somatostatin/genetics ; Trans-Activators/chemistry/*metabolism ; Transcription Factors/metabolism ; *Transcription, Genetic ; Transcriptional Activation ; Transfection ; Tretinoin/metabolism/pharmacology
    Print ISSN: 0036-8075
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  • 10
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    Interactions of the COP9 signalosome with the E3 ubiquitin ligase SCFTIRI in mediating auxin response (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-05-05
    Description: The COP9 signalosome is an evolutionary conserved multiprotein complex of unknown function that acts as a negative regulator of photomorphogenic seedling development in Arabidopsis. Here, we show that plants with reduced COP9 signalosome levels had decreased auxin response similar to loss-of-function mutants of the E3 ubiquitin ligase SCFTIR1. Furthermore, we found that the COP9 signalosome and SCFTIR1 interacted in vivo and that the COP9 signalosome was required for efficient degradation of PSIAA6, a candidate substrate of SCFTIR1. Thus, the COP9 signalosome may play an important role in mediating E3 ubiquitin ligase-mediated responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwechheimer, C -- Serino, G -- Callis, J -- Crosby, W L -- Lyapina, S -- Deshaies, R J -- Gray, W M -- Estelle, M -- Deng, X W -- New York, N.Y. -- Science. 2001 May 18;292(5520):1379-82. Epub 2001 May 3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11337587" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/*drug effects/enzymology/genetics/growth & development ; Brassica ; Darkness ; Gene Expression Regulation, Plant/drug effects ; Genes, Reporter/genetics ; Indoleacetic Acids/*pharmacology ; Ligases/genetics/*metabolism ; Multiprotein Complexes ; Mutation/genetics ; Peas ; Peptide Hydrolases ; Phenotype ; Plant Proteins/genetics/*metabolism ; Plant Roots/drug effects/enzymology/genetics/growth & development ; Plants, Genetically Modified ; Precipitin Tests ; Protein Binding ; Protein Biosynthesis ; Protein Subunits ; Proteins/genetics/*metabolism ; RNA, Antisense/genetics ; RNA, Plant/genetics/metabolism ; Two-Hybrid System Techniques ; Ubiquitin-Protein Ligases
    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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  • 11
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    Public health. Reducing HIV transmission in developing countries (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jha, P -- Nagelkerke, J D -- Ngugi, E N -- Prasada Rao, J V -- Willbond, B -- Moses, S -- Plummer, F A -- New York, N.Y. -- Science. 2001 Apr 13;292(5515):224-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Economics Advisory Service, World Health Organization, Geneva, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11305312" target="_blank"〉PubMed〈/a〉
    Keywords: Anti-HIV Agents/therapeutic use ; Condoms ; Cost-Benefit Analysis ; Counseling ; *Developing Countries ; Disease Outbreaks/prevention & control ; Female ; Financial Support ; HIV Infections/epidemiology/*prevention & control/*transmission ; Health Education ; Humans ; Infectious Disease Transmission, Vertical/prevention & control ; Male ; Population Surveillance ; Prostitution ; Risk Factors ; Sexual Behavior ; Sexually Transmitted Diseases/drug therapy/prevention & control ; United Nations/economics
    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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  • 12
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    Localization of long-term memory within the Drosophila mushroom body (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-03
    Description: The mushroom bodies, substructures of the Drosophila brain, are involved in olfactory learning and short-term memory, but their role in long-term memory is unknown. Here we show that the alpha-lobes-absent (ala) mutant lacks either the two vertical lobes of the mushroom body or two of the three median lobes which contain branches of vertical lobe neurons. This unique phenotype allows analysis of mushroom body function. Long-term memory required the presence of the vertical lobes but not the median lobes. Short-term memory was normal in flies without either vertical lobes or the two median lobes studied.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pascual, A -- Preat, T -- New York, N.Y. -- Science. 2001 Nov 2;294(5544):1115-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developpement, Evolution, Plasticite du Systeme Nerveux, CNRS, 1 Avenue de la Terrasse, 91190 Gif-sur-Yvette, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11691997" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/physiology ; Conditioning (Psychology) ; Dendrites/physiology ; Drosophila/genetics/*physiology ; Electroshock ; Genes, Insect ; Memory/*physiology ; Memory, Short-Term/physiology ; Microscopy, Confocal ; Mushroom Bodies/anatomy & histology/*physiology ; Mutation ; Neurons, Efferent/physiology ; Odors ; Phenotype
    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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  • 13
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    The ethical reasons for stem cell research (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-05-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lanza, R P -- Cibelli, J B -- West, M D -- Dorff, E -- Tauer, C -- Green, R M -- New York, N.Y. -- Science. 2001 May 18;292(5520):1299.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11360981" target="_blank"〉PubMed〈/a〉
    Keywords: *Bioethics ; Cell Differentiation ; Cell Line ; *Embryo Research ; Embryo, Mammalian/cytology ; Financing, Organized ; *Government Regulation ; Humans ; National Institutes of Health (U.S.) ; Regeneration ; Research/economics/*legislation & jurisprudence/standards ; *Stem Cells/cytology ; United States ; United States Dept. of Health and Human Services
    Print ISSN: 0036-8075
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  • 14
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    Molecular mechanisms of the biological clock in cultured fibroblasts (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-17
    Description: In mammals, the central circadian pacemaker resides in the hypothalamic suprachiasmatic nucleus (SCN), but circadian oscillators also exist in peripheral tissues. Here, using wild-type and cryptochrome (mCry)-deficient cell lines derived from mCry mutant mice, we show that the peripheral oscillator in cultured fibroblasts is identical to the oscillator in the SCN in (i) temporal expression profiles of all known clock genes, (ii) the phase of the various mRNA rhythms (i.e., antiphase oscillation of Bmal1 and mPer genes), (iii) the delay between maximum mRNA levels and appearance of nuclear mPER1 and mPER2 protein, (iv) the inability to produce oscillations in the absence of functional mCry genes, and (v) the control of period length by mCRY proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yagita, K -- Tamanini, F -- van Der Horst, G T -- Okamura, H -- New York, N.Y. -- Science. 2001 Apr 13;292(5515):278-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Molecular Brain Science, Department of Brain Sciences, Kobe University Graduate School of Medicine, Chuo-ku, Kobe 650-0017, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11303101" target="_blank"〉PubMed〈/a〉
    Keywords: ARNTL Transcription Factors ; Animals ; Basic Helix-Loop-Helix Transcription Factors ; Biological Clocks/*genetics ; CLOCK Proteins ; Cell Cycle Proteins ; Cell Line ; Cell Nucleus/metabolism ; Circadian Rhythm/*genetics ; Cryptochromes ; *DNA-Binding Proteins ; *Drosophila Proteins ; Endothelin-1/pharmacology ; *Eye Proteins ; Fibroblasts/*physiology ; Flavoproteins/genetics/metabolism ; Gene Expression Profiling ; *Gene Expression Regulation ; Nuclear Proteins/genetics/metabolism ; Period Circadian Proteins ; *Photoreceptor Cells, Invertebrate ; RNA, Messenger/genetics/metabolism ; Rats ; Receptors, G-Protein-Coupled ; Suprachiasmatic Nucleus/metabolism ; Time Factors ; Trans-Activators/genetics/metabolism ; Transcription Factors/genetics/metabolism
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  • 15
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    Genomics and medicine. Dissecting human disease in the postgenomic era (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peltonen, L -- McKusick, V A -- New York, N.Y. -- Science. 2001 Feb 16;291(5507):1224-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Human Genetics, University of California Los Angeles School of Medicine, Los Angeles, CA 90095-7088, USA. lpeltonen@mednet.ucla.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11233446" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Computational Biology ; Delivery of Health Care ; *Disease ; Environment ; Gene Expression Profiling ; *Genetic Diseases, Inborn ; Genetic Predisposition to Disease ; Genetic Testing ; Genetic Variation ; *Genetics, Medical ; Genome ; *Genome, Human ; *Genomics ; Human Genome Project ; Humans ; Metabolic Diseases/genetics ; Multifactorial Inheritance ; Mutation ; Phenotype ; Polymorphism, Single Nucleotide ; Quantitative Trait, Heritable ; Risk 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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  • 16
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    Pot1, the putative telomere end-binding protein in fission yeast and humans (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-05-12
    Description: Telomere proteins from ciliated protozoa bind to the single-stranded G-rich DNA extensions at the ends of macronuclear chromosomes. We have now identified homologous proteins in fission yeast and in humans. These Pot1 (protection of telomeres) proteins each bind the G-rich strand of their own telomeric repeat sequence, consistent with a direct role in protecting chromosome ends. Deletion of the fission yeast pot1+ gene has an immediate effect on chromosome stability, causing rapid loss of telomeric DNA and chromosome circularization. It now appears that the protein that caps the ends of chromosomes is widely dispersed throughout the eukaryotic kingdom.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baumann, P -- Cech, T R -- New York, N.Y. -- Science. 2001 May 11;292(5519):1171-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11349150" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Binding Sites ; Chromosome Segregation/genetics ; Chromosomes, Fungal/genetics/metabolism ; Cloning, Molecular ; DNA/genetics/metabolism ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; Electrophoresis, Gel, Pulsed-Field ; Female ; Gene Deletion ; Gene Expression Profiling ; Heterozygote ; Humans ; Molecular Sequence Data ; Ovary/metabolism ; Phenotype ; RNA, Messenger/analysis/genetics ; Schizosaccharomyces/*genetics ; Schizosaccharomyces pombe Proteins ; Sequence Alignment ; Substrate Specificity ; Telomere/genetics/*metabolism ; *Telomere-Binding Proteins
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 17
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    Auditory spatial receptive fields created by multiplication (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-17
    Description: Examples of multiplication by neurons or neural circuits are scarce, although many computational models use this basic operation. The owl's auditory system computes interaural time (ITD) and level (ILD) differences to create a two-dimensional map of auditory space. Space-specific neurons are selective for combinations of ITD and ILD, which define, respectively, the horizontal and vertical dimensions of their receptive fields. A multiplication of separate postsynaptic potentials tuned to ITD and ILD, rather than an addition, can account for the subthreshold responses of these neurons to ITD-ILD pairs. Other nonlinear processes improve the spatial tuning of the spike output and reduce the fit to the multiplicative model.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pena, J L -- Konishi, M -- DC00134/DC/NIDCD NIH HHS/ -- New York, N.Y. -- Science. 2001 Apr 13;292(5515):249-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology 216-76, California Institute of Technology, Pasadena, CA 91125, USA. jose@etho.caltech.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11303092" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Action Potentials ; Animals ; Auditory Pathways ; Auditory Perception/*physiology ; Female ; Inferior Colliculi/cytology/*physiology ; Male ; Mathematics ; Membrane Potentials ; Neurons/*physiology ; Sound Localization/*physiology ; Strigiformes/*physiology ; *Synaptic Transmission
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 18
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    An apolipoprotein influencing triglycerides in humans and mice revealed by comparative sequencing (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-10-06
    Description: Comparison of genomic DNA sequences from human and mouse revealed a new apolipoprotein (APO) gene (APOAV) located proximal to the well-characterized APOAI/CIII/AIV gene cluster on human 11q23. Mice expressing a human APOAV transgene showed a decrease in plasma triglyceride concentrations to one-third of those in control mice; conversely, knockout mice lacking Apoav had four times as much plasma triglycerides as controls. In humans, single nucleotide polymorphisms (SNPs) across the APOAV locus were found to be significantly associated with plasma triglyceride levels in two independent studies. These findings indicate that APOAV is an important determinant of plasma triglyceride levels, a major risk factor for coronary artery disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennacchio, L A -- Olivier, M -- Hubacek, J A -- Cohen, J C -- Cox, D R -- Fruchart, J C -- Krauss, R M -- Rubin, E M -- HL-18574/HL/NHLBI NIH HHS/ -- HL-53917/HL/NHLBI NIH HHS/ -- HL66681/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2001 Oct 5;294(5540):169-73.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Genome Sciences Department, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11588264" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Alleles ; Animals ; Apolipoprotein C-III ; Apolipoproteins/*genetics/*physiology ; Apolipoproteins A ; Apolipoproteins C/blood ; Chromosomes, Human, Pair 11 ; Cohort Studies ; Computational Biology ; Coronary Disease/etiology/genetics ; Expressed Sequence Tags ; Female ; Haplotypes ; Humans ; Linkage Disequilibrium ; Lipoproteins, VLDL/blood ; Male ; Mice ; Mice, Knockout ; Mice, Transgenic ; Multigene Family ; Open Reading Frames ; Polymorphism, Single Nucleotide ; Risk Factors ; Sequence Analysis, DNA ; Transgenes ; Triglycerides/*blood
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 19
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    Vascular abnormalities and deregulation of VEGF in Lkb1-deficient mice (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-18
    Description: The LKB1 tumor suppressor gene, mutated in Peutz-Jeghers syndrome, encodes a serine/threonine kinase of unknown function. Here we show that mice with a targeted disruption of Lkb1 die at midgestation, with the embryos showing neural tube defects, mesenchymal cell death, and vascular abnormalities. Extraembryonic development was also severely affected; the mutant placentas exhibited defective labyrinth layer development and the fetal vessels failed to invade the placenta. These phenotypes were associated with tissue-specific deregulation of vascular endothelial growth factor (VEGF) expression, including a marked increase in the amount of VEGF messenger RNA. Moreover, VEGF production in cultured Lkb1(-/-) fibroblasts was elevated in both normoxic and hypoxic conditions. These findings place Lkb1 in the VEGF signaling pathway and suggest that the vascular defects accompanying Lkb1 loss are mediated at least in part by VEGF.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ylikorkala, A -- Rossi, D J -- Korsisaari, N -- Luukko, K -- Alitalo, K -- Henkemeyer, M -- Makela, T P -- New York, N.Y. -- Science. 2001 Aug 17;293(5533):1323-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular and Cancer Biology Program, Haartman Institute and Biomedicum Helsinki, Post Office Box 63, University of Helsinki, Helsinki 00014, Finland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11509733" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Vessels/*abnormalities/embryology ; Cell Death ; Cell Hypoxia ; Cells, Cultured ; DNA-Binding Proteins/metabolism ; Embryo, Mammalian/*metabolism ; Embryonic and Fetal Development ; Endothelial Growth Factors/*genetics/*metabolism ; Endothelium, Vascular/abnormalities/cytology/embryology ; *Gene Expression Regulation, Developmental ; Gene Targeting ; Hypoxia-Inducible Factor 1 ; Hypoxia-Inducible Factor 1, alpha Subunit ; In Situ Hybridization ; Lymphokines/*genetics/*metabolism ; Mesoderm/cytology ; Mice ; Mice, Inbred C57BL ; Muscle, Smooth, Vascular/abnormalities/cytology/embryology ; Neural Tube Defects/embryology ; Nuclear Proteins/metabolism ; Phenotype ; Placenta/blood supply/embryology/metabolism ; Protein-Serine-Threonine Kinases/deficiency/genetics/*physiology ; RNA, Messenger/genetics/metabolism ; Signal Transduction ; *Transcription Factors ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 20
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    Requirement for the SLP-76 adaptor GADS in T cell development (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-10
    Description: GADS is an adaptor protein implicated in CD3 signaling because of its ability to link SLP-76 to LAT. A GADS-deficient mouse was generated by gene targeting, and the function of GADS in T cell development and activation was examined. GADS- CD4-CD8- thymocytes exhibited a severe block in proliferation but still differentiated into mature T cells. GADS- thymocytes failed to respond to CD3 cross-linking in vivo and were impaired in positive and negative selection. Immunoprecipitation experiments revealed that the association between SLP-76 and LAT was uncoupled in GADS- thymocytes. These observations indicate that GADS is a critical adaptor for CD3 signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoder, J -- Pham, C -- Iizuka, Y M -- Kanagawa, O -- Liu, S K -- McGlade, J -- Cheng, A M -- New York, N.Y. -- Science. 2001 Mar 9;291(5510):1987-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Scientist Training Program, 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/11239162" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptor Proteins, Signal Transducing ; Animals ; Antigens, CD3/metabolism ; Carrier Proteins/*metabolism ; Cell Differentiation ; Cell Division ; Cell Lineage ; Cell Size ; Female ; Gene Targeting ; Lymphocyte Activation ; Male ; *Membrane Proteins ; Mice ; Mice, Transgenic ; Phosphoproteins/*metabolism ; Phosphorylation ; Receptors, Antigen, T-Cell/metabolism ; Signal Transduction ; Spleen/cytology/immunology ; T-Lymphocytes/*cytology/immunology ; Thymus Gland/cytology/immunology ; src Homology Domains
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  • 21
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    Clinical resistance to STI-571 cancer therapy caused by BCR-ABL gene mutation or amplification (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-26
    Description: Clinical studies with the Abl tyrosine kinase inhibitor STI-571 in chronic myeloid leukemia demonstrate that many patients with advanced stage disease respond initially but then relapse. Through biochemical and molecular analysis of clinical material, we find that drug resistance is associated with the reactivation of BCR-ABL signal transduction in all cases examined. In six of nine patients, resistance was associated with a single amino acid substitution in a threonine residue of the Abl kinase domain known to form a critical hydrogen bond with the drug. This substitution of threonine with isoleucine was sufficient to confer STI-571 resistance in a reconstitution experiment. In three patients, resistance was associated with progressive BCR-ABL gene amplification. These studies provide evidence that genetically complex cancers retain dependence on an initial oncogenic event and suggest a strategy for identifying inhibitors of STI-571 resistance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gorre, M E -- Mohammed, M -- Ellwood, K -- Hsu, N -- Paquette, R -- Rao, P N -- Sawyers, C L -- GM07185/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Aug 3;293(5531):876-80. Epub 2001 Jun 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Molecular Biology Institute, University of California, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11423618" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Antineoplastic Agents/metabolism/pharmacology/therapeutic use ; Base Sequence ; Benzamides ; Blast Crisis/genetics ; Cell Line ; Drug Resistance, Neoplasm/genetics ; Fusion Proteins, bcr-abl/*metabolism ; Gene Amplification ; *Genes, abl ; Humans ; Hydrogen Bonding ; Imatinib Mesylate ; Leukemia, Myelogenous, Chronic, BCR-ABL Positive/*drug therapy/*genetics ; Molecular Sequence Data ; Philadelphia Chromosome ; Phosphorylation ; Piperazines/metabolism/*pharmacology/therapeutic use ; Point Mutation ; Protein Structure, Tertiary ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-abl/antagonists & ; inhibitors/chemistry/*genetics/metabolism ; Proto-Oncogene Proteins c-crk ; Pyrimidines/metabolism/*pharmacology/therapeutic use ; Recurrence ; Signal Transduction
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 22
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    Nutrition. The epidemic that wasn't? (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Taubes, G -- New York, N.Y. -- Science. 2001 Mar 30;291(5513):2540.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11286268" target="_blank"〉PubMed〈/a〉
    Keywords: Cause of Death ; Coronary Artery Disease/classification/*epidemiology/mortality ; Coronary Disease/classification/*epidemiology/mortality ; Death Certificates ; *Disease Outbreaks ; Female ; Humans ; Male ; Population Dynamics ; United States/epidemiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 23
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    An fMRI investigation of emotional engagement in moral judgment (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-09-15
    Description: The long-standing rationalist tradition in moral psychology emphasizes the role of reason in moral judgment. A more recent trend places increased emphasis on emotion. Although both reason and emotion are likely to play important roles in moral judgment, relatively little is known about their neural correlates, the nature of their interaction, and the factors that modulate their respective behavioral influences in the context of moral judgment. In two functional magnetic resonance imaging (fMRI) studies using moral dilemmas as probes, we apply the methods of cognitive neuroscience to the study of moral judgment. We argue that moral dilemmas vary systematically in the extent to which they engage emotional processing and that these variations in emotional engagement influence moral judgment. These results may shed light on some puzzling patterns in moral judgment observed by contemporary philosophers.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Greene, J D -- Sommerville, R B -- Nystrom, L E -- Darley, J M -- Cohen, J D -- New York, N.Y. -- Science. 2001 Sep 14;293(5537):2105-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for the Study of Brain, Mind, and Behavior, Department of Philosophy, 1879 Hall, Princeton University, Princeton, NJ 08544, USA. jdgreene@princeton.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11557895" target="_blank"〉PubMed〈/a〉
    Keywords: Brain/*physiology ; Brain Mapping ; *Emotions ; Female ; Humans ; *Judgment ; *Magnetic Resonance Imaging ; Male ; Mental Processes ; *Morals ; Reaction Time
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  • 24
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    Nutrition. What if Americans ate less saturated fat? (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Taubes, G -- New York, N.Y. -- Science. 2001 Mar 30;291(5513):2538.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11286267" target="_blank"〉PubMed〈/a〉
    Keywords: *Diet, Fat-Restricted ; Dietary Fats/*administration & dosage ; Female ; Humans ; *Life Expectancy ; Male ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 25
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    Molecular biology. Getting p53 out of the nucleus (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gottifredi, V -- Prives, C -- New York, N.Y. -- Science. 2001 Jun 8;292(5523):1851-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Columbia University, New York, NY 10027, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11397937" target="_blank"〉PubMed〈/a〉
    Keywords: Active Transport, Cell Nucleus ; Cell Cycle ; Cell Line ; Cell Nucleus/*metabolism ; Cysteine Endopeptidases/metabolism ; Cytoplasm/metabolism ; DNA Damage ; Humans ; Multienzyme Complexes/metabolism ; Nuclear Localization Signals ; Nuclear Pore/metabolism ; *Nuclear Proteins ; Phosphorylation ; Proteasome Endopeptidase Complex ; *Protein Sorting Signals ; Proto-Oncogene Proteins/chemistry/metabolism ; Proto-Oncogene Proteins c-mdm2 ; Recombinant Fusion Proteins/metabolism ; Tumor Suppressor Protein p53/chemistry/*metabolism ; Ubiquitins/metabolism ; Ultraviolet Rays
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 26
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    Formation of neurofibrillary tangles in P301l tau transgenic mice induced by Abeta 42 fibrils (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-25
    Description: beta-Amyloid plaques and neurofibrillary tangles (NFTs) are the defining neuropathological hallmarks of Alzheimer's disease, but their pathophysiological relation is unclear. Injection of beta-amyloid Abeta42 fibrils into the brains of P301L mutant tau transgenic mice caused fivefold increases in the numbers of NFTs in cell bodies within the amygdala from where neurons project to the injection sites. Gallyas silver impregnation identified NFTs that contained tau phosphorylated at serine 212/threonine 214 and serine 422. NFTs were composed of twisted filaments and occurred in 6-month-old mice as early as 18 days after Abeta42 injections. Our data support the hypothesis that Abeta42 fibrils can accelerate NFT formation in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gotz, J -- Chen, F -- van Dorpe, J -- Nitsch, R M -- New York, N.Y. -- Science. 2001 Aug 24;293(5534):1491-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Psychiatry Research, University of Zurich, August Forel Strasse 1, 8008 Zurich, Switzerland. goetz@bli.unizh.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11520988" target="_blank"〉PubMed〈/a〉
    Keywords: Aged ; Aged, 80 and over ; Alzheimer Disease/metabolism/*pathology ; Amygdala/*pathology ; Amyloid beta-Peptides/administration & dosage/*metabolism ; Animals ; Brain/*pathology ; Epitopes ; Female ; Fluorescent Antibody Technique ; Humans ; Male ; Mice ; Mice, Transgenic ; Microscopy, Immunoelectron ; Mutation ; Neurofibrillary Tangles/*metabolism/pathology ; Peptide Fragments/administration & dosage/*metabolism ; Phosphorylation ; Plaque, Amyloid/*metabolism/pathology ; Protein Conformation ; Protein Isoforms ; Sex Characteristics ; tau Proteins/chemistry/genetics/immunology/*metabolism
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  • 27
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    Reversal of obesity- and diet-induced insulin resistance with salicylates or targeted disruption of Ikkbeta (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-09-05
    Description: We show that high doses of salicylates reverse hyperglycemia, hyperinsulinemia, and dyslipidemia in obese rodents by sensitizing insulin signaling. Activation or overexpression of the IkappaB kinase beta (IKKbeta) attenuated insulin signaling in cultured cells, whereas IKKbeta inhibition reversed insulin resistance. Thus, IKKbeta, rather than the cyclooxygenases, appears to be the relevant molecular target. Heterozygous deletion (Ikkbeta+/-) protected against the development of insulin resistance during high-fat feeding and in obese Lep(ob/ob) mice. These findings implicate an inflammatory process in the pathogenesis of insulin resistance in obesity and type 2 diabetes mellitus and identify the IKKbeta pathway as a target for insulin sensitization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yuan, M -- Konstantopoulos, N -- Lee, J -- Hansen, L -- Li, Z W -- Karin, M -- Shoelson, S E -- AI43477/AI/NIAID NIH HHS/ -- DK45493/DK/NIDDK NIH HHS/ -- DK51729/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2001 Aug 31;293(5535):1673-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Joslin Diabetes Center and Department of Medicine, Harvard Medical School, Boston, MA 02215, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11533494" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Inflammatory Agents, Non-Steroidal/pharmacology ; Aspirin/administration & dosage/*pharmacology ; Blood Glucose/metabolism ; Cell Line ; Dietary Fats/*administration & dosage ; Gene Deletion ; Gene Targeting ; Glucose Tolerance Test ; I-kappa B Kinase ; Insulin/administration & dosage/blood/*metabolism/pharmacology ; *Insulin Resistance ; Lipids/blood ; Liver/metabolism ; Male ; Mice ; Mice, Obese ; Muscles/metabolism ; Obesity/metabolism/*physiopathology ; Phosphorylation ; Prostaglandin-Endoperoxide Synthases/genetics/metabolism ; Protein-Serine-Threonine Kinases/antagonists & inhibitors/genetics/*metabolism ; Rats ; Rats, Zucker ; Receptor, Insulin/metabolism ; Signal Transduction ; Sodium Salicylate/administration & dosage/*pharmacology ; Tumor Necrosis Factor-alpha/pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 28
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    RNA rules--at least sometimes (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 2001 Aug 10;293(5532):1066.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11498572" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dosage Compensation, Genetic ; Female ; *Gene Expression Regulation ; Gene Silencing ; Male ; Plants/genetics ; RNA/*metabolism ; RNA, Double-Stranded/metabolism
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    Human evolution. Zoo's new primate exhibit to double as research lab (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 2001 Aug 17;293(5533):1247.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11509707" target="_blank"〉PubMed〈/a〉
    Keywords: Academies and Institutes ; Animals ; *Animals, Zoo ; Cognition ; Female ; Germany ; Humans ; Male ; *Primates ; *Research
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    A role for thrombin receptor signaling in endothelial cells during embryonic development (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-09-05
    Description: The coagulation protease thrombin triggers fibrin formation, platelet activation, and other cellular responses at sites of tissue injury. We report a role for PAR1, a protease-activated G protein-coupled receptor for thrombin, in embryonic development. Approximately half of Par1-/- mouse embryos died at midgestation with bleeding from multiple sites. PAR1 is expressed in endothelial cells, and a PAR1 transgene driven by an endothelial-specific promoter prevented death of Par1-/- embryos. Our results suggest that the coagulation cascade and PAR1 modulate endothelial cell function in developing blood vessels and that thrombin's actions on endothelial cells-rather than on platelets, mesenchymal cells, or fibrinogen-contribute to vascular development and hemostasis in the mouse embryo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Griffin, C T -- Srinivasan, Y -- Zheng, Y W -- Huang, W -- Coughlin, S R -- HL44907/HL/NHLBI NIH HHS/ -- HL65590/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2001 Aug 31;293(5535):1666-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cardiovascular Research Institute, University of California at San Francisco (UCSF), San Francisco, California 94143.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11533492" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Coagulation ; Blood Coagulation Factors/physiology ; Blood Vessels/*embryology/metabolism ; Calcium/metabolism ; Crosses, Genetic ; *Embryonic and Fetal Development ; Endocardium/embryology/metabolism ; Endothelium, Vascular/cytology/*embryology/metabolism ; Factor V/genetics/physiology ; Female ; Fibrinogen/genetics/physiology ; Fibroblasts/metabolism ; Hemorrhage/embryology ; Hemostasis ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Inbred Strains ; Mice, Transgenic ; *Neovascularization, Physiologic ; Phenotype ; Prothrombin/genetics/physiology ; Receptor, PAR-1 ; Receptors, Thrombin/deficiency/genetics/*physiology ; *Signal Transduction ; Thrombin/physiology ; Thromboplastin/genetics/physiology
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    A p53 amino-terminal nuclear export signal inhibited by DNA damage-induced phosphorylation (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-09
    Description: The p53 protein is present in low amounts in normally growing cells and is activated in response to physiological insults. MDM2 regulates p53 either through inhibiting p53's transactivating function in the nucleus or by targeting p53 degradation in the cytoplasm. We identified a previously unknown nuclear export signal (NES) in the amino terminus of p53, spanning residues 11 to 27 and containing two serine residues phosphorylated after DNA damage, which was required for p53 nuclear export in colloboration with the carboxyl-terminal NES. Serine-15-phosphorylated p53 induced by ultraviolet irradiation was not exported. Thus, DNA damage-induced phosphorylation may achieve optimal p53 activation by inhibiting both MDM2 binding to, and the nuclear export of, p53.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Y -- Xiong, Y -- CA65572/CA/NCI NIH HHS/ -- K01 CA087580/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2001 Jun 8;292(5523):1910-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lineberger Comprehensive Cancer Center, Department of Biochemistry and Biophysics, and Program in Molecular Biology and Biotechnology, University of North Carolina at Chapel Hill, NC 27599-7295, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11397945" target="_blank"〉PubMed〈/a〉
    Keywords: Active Transport, Cell Nucleus ; Amino Acid Sequence ; Animals ; Cell Fusion ; Cell Line ; Cell Nucleus/*metabolism ; Cells, Cultured ; Cytoplasm/metabolism ; *DNA Damage ; Mice ; Molecular Sequence Data ; Mutation ; *Nuclear Proteins ; Phosphorylation ; Phosphoserine/metabolism ; *Protein Sorting Signals ; Protein Structure, Tertiary ; Proteins/genetics/metabolism ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-mdm2 ; Recombinant Fusion Proteins/metabolism ; Transfection ; Tumor Suppressor Protein p14ARF ; Tumor Suppressor Protein p53/*chemistry/genetics/*metabolism ; Ubiquitins/metabolism ; Ultraviolet Rays
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    Priorities in HIV prevention (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Behrman, A J -- New York, N.Y. -- Science. 2001 Jan 5;291(5501):45-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11192004" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Child ; Female ; HIV Infections/epidemiology/*prevention & control ; *Health Priorities ; Heterosexuality ; Homosexuality, Male ; Humans ; Male ; Prevalence ; Risk Factors ; United States/epidemiology
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    Regulation of vegetative phase change in Arabidopsis thaliana by cyclophilin 40 (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-27
    Description: During its development, a plant shoot progresses from a juvenile to an adult phase of vegetative growth and from a reproductively incompetent to a reproductively competent state. In Arabidopsis, loss-of-function mutations in SQUINT (SQN) reduced the number of juvenile leaves and had subtle effects on inflorescence morphology but had no effect on flowering time or on reproductive competence. SQN encodes the Arabidopsis homolog of cyclophilin 40 (CyP40), a protein found in association with the Hsp90 chaperone complex in yeast, mammals, and plants. Thus, in Arabidopsis, CyP40 is specifically required for the vegetative but not the reproductive maturation of the shoot.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Berardini, T Z -- Bollman, K -- Sun, H -- Poethig, R S -- R01-GM1893-04/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Mar 23;291(5512):2405-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Plant Science Institute, Department of Biology, University of Pennsylvania, Philadelphia, PA 19104-6018, USA. spoethig@sas.upenn.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11264535" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/anatomy & histology/*genetics/*growth & development/physiology ; Carrier Proteins/chemistry/genetics/physiology ; Chromosome Mapping ; *Cyclophilins ; Exons ; Gene Expression Regulation, Plant ; Genes, Plant ; Heat-Shock Proteins/genetics ; Molecular Sequence Data ; Mutation ; Peptidylprolyl Isomerase/chemistry/genetics/physiology ; Phenotype ; Plant Leaves/anatomy & histology/growth & development ; Plant Shoots/growth & development/physiology ; Reproduction ; Sequence Alignment ; Temperature
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    Prevention of chemotherapy-induced alopecia in rats by CDK inhibitors (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-01-06
    Description: Most traditional cytotoxic anticancer agents ablate the rapidly dividing epithelium of the hair follicle and induce alopecia (hair loss). Inhibition of cyclin-dependent kinase 2 (CDK2), a positive regulator of eukaryotic cell cycle progression, may represent a therapeutic strategy for prevention of chemotherapy-induced alopecia (CIA) by arresting the cell cycle and reducing the sensitivity of the epithelium to many cell cycle-active antitumor agents. Potent small-molecule inhibitors of CDK2 were developed using structure-based methods. Topical application of these compounds in a neonatal rat model of CIA reduced hair loss at the site of application in 33 to 50% of the animals. Thus, inhibition of CDK2 represents a potentially useful approach for the prevention of CIA in cancer patients.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, S T -- Benson, B G -- Bramson, H N -- Chapman, D E -- Dickerson, S H -- Dold, K M -- Eberwein, D J -- Edelstein, M -- Frye, S V -- Gampe Jr, R T -- Griffin, R J -- Harris, P A -- Hassell, A M -- Holmes, W D -- Hunter, R N -- Knick, V B -- Lackey, K -- Lovejoy, B -- Luzzio, M J -- Murray, D -- Parker, P -- Rocque, W J -- Shewchuk, L -- Veal, J M -- Walker, D H -- Kuyper, L F -- New York, N.Y. -- Science. 2001 Jan 5;291(5501):134-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cancer Biology, Glaxo Wellcome Research and Development, Research Triangle Park, NC 27709, USA. std41085@glaxowellcome.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11141566" target="_blank"〉PubMed〈/a〉
    Keywords: Alopecia/*chemically induced/*prevention & control ; Animals ; Animals, Newborn ; Antineoplastic Agents/*toxicity ; Antineoplastic Combined Chemotherapy Protocols/toxicity ; Apoptosis/drug effects ; *CDC2-CDC28 Kinases ; Cell Cycle/drug effects ; Cell Line ; Cyclin-Dependent Kinase 2 ; Cyclin-Dependent Kinases/*antagonists & inhibitors/metabolism ; Cyclophosphamide/toxicity ; Cytoprotection/drug effects ; DNA/biosynthesis ; Doxorubicin/toxicity ; Drug Design ; Enzyme Inhibitors/chemical synthesis/chemistry/*pharmacology ; Epithelium/drug effects ; Etoposide/toxicity ; Hair Follicle/cytology/*drug effects ; Humans ; Indoles/chemical synthesis/chemistry/*pharmacology ; Mice ; Mice, SCID ; Phosphorylation ; Protein-Serine-Threonine Kinases/*antagonists & inhibitors/metabolism ; Rats ; Retinoblastoma Protein/metabolism ; Scalp/transplantation ; Sulfonamides/chemical synthesis/chemistry/*pharmacology ; Transplantation, Heterologous
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    RGS-PX1, a GAP for GalphaS and sorting nexin in vesicular trafficking (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-01
    Description: Heterotrimeric GTP-binding proteins (G proteins) control cellular functions by transducing signals from the outside to the inside of cells. Regulator of G protein signaling (RGS) proteins are key modulators of the amplitude and duration of G protein-mediated signaling through their ability to serve as guanosine triphosphatase-activating proteins (GAPs). We have identified RGS-PX1, a Galpha(s)-specific GAP. The RGS domain of RGS-PX1 specifically interacted with Galpha(s), accelerated its GTP hydrolysis, and attenuated Galpha(s)-mediated signaling. RGS-PX1 also contains a Phox (PX) domain that resembles those in sorting nexin (SNX) proteins. Expression of RGS-PX1 delayed lysosomal degradation of the EGF receptor. Because of its bifunctional role as both a GAP and a SNX, RGS-PX1 may link heterotrimeric G protein signaling and vesicular trafficking.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zheng, B -- Ma, Y C -- Ostrom, R S -- Lavoie, C -- Gill, G N -- Insel, P A -- Huang, X Y -- Farquhar, M G -- AG14563/AG/NIA NIH HHS/ -- CA58689/CA/NCI NIH HHS/ -- DK17780/DK/NIDDK NIH HHS/ -- GM56904/GM/NIGMS NIH HHS/ -- HL53773/HL/NHLBI NIH HHS/ -- HL63885/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2001 Nov 30;294(5548):1939-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA 92093-0651, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11729322" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic beta-2 Receptor Agonists ; Amino Acid Sequence ; Animals ; COS Cells ; Carrier Proteins/chemistry/*metabolism ; Cattle ; Cell Line ; Cyclic AMP/metabolism ; Endosomes/chemistry/metabolism ; GTP-Binding Protein alpha Subunits, Gs/antagonists & inhibitors/*metabolism ; GTPase-Activating Proteins/chemistry/*metabolism ; Guanosine Triphosphate/metabolism ; Humans ; Mitogen-Activated Protein Kinases/metabolism ; Molecular Sequence Data ; Protein Binding ; Protein Interaction Mapping ; Protein Structure, Tertiary ; Protein Transport ; RGS Proteins/chemistry/*metabolism ; Receptor, Epidermal Growth Factor/metabolism ; Receptors, Adrenergic, beta-2/genetics/metabolism ; Sequence Alignment ; Signal Transduction ; Sorting Nexins ; Substrate Specificity ; *Vesicular Transport Proteins
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    Negative regulation of neural stem/progenitor cell proliferation by the Pten tumor suppressor gene in vivo (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-03
    Description: The mechanisms controlling neural stem cell proliferation are poorly understood. Here we demonstrate that the PTEN tumor suppressor plays an important role in regulating neural stem/progenitor cells in vivo and in vitro. Mice lacking PTEN exhibited enlarged, histoarchitecturally abnormal brains, which resulted from increased cell proliferation, decreased cell death, and enlarged cell size. Neurosphere cultures revealed a greater proliferation capacity for tripotent Pten-/- central nervous system stem/progenitor cells, which can be attributed, at least in part, to a shortened cell cycle. However, cell fate commitments of the progenitors were largely undisturbed. Our results suggest that PTEN negatively regulates neural stem cell proliferation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Groszer, M -- Erickson, R -- Scripture-Adams, D D -- Lesche, R -- Trumpp, A -- Zack, J A -- Kornblum, H I -- Liu, X -- Wu, H -- MH062800-01/MH/NIMH NIH HHS/ -- NS38489/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2001 Dec 7;294(5549):2186-9. Epub 2001 Nov 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Molecular and Medical Pharmacology, UCLA School of Medicine, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11691952" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Astrocytes/cytology ; Brain/abnormalities/*cytology/embryology ; Cell Count ; Cell Differentiation ; *Cell Division ; Cell Lineage ; Cell Size ; Cells, Cultured ; Female ; Flow Cytometry ; Fluoresceins/metabolism ; Gene Deletion ; Intermediate Filament Proteins/metabolism ; Male ; Mice ; Mice, Knockout ; *Nerve Tissue Proteins ; Nestin ; Neurons/*cytology ; PTEN Phosphohydrolase ; Phosphoric Monoester Hydrolases/*genetics/*physiology ; Stem Cells/*cytology ; Succinimides/metabolism ; Tumor Suppressor Proteins/*genetics/*physiology
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    Cell biology. NO helps make fireflies flash (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 2001 Jun 29;292(5526):2413-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11431541" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Beetles/cytology/*metabolism ; Cell Communication ; Female ; *Luminescence ; Male ; Mitochondria/metabolism ; Nitric Oxide/*metabolism/pharmacology ; Oxygen/metabolism
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    Essays on science and society. Defining disease in the genomics era (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Temple, L K -- McLeod, R S -- Gallinger, S -- Wright, J G -- New York, N.Y. -- Science. 2001 Aug 3;293(5531):807-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Surgery, University of Toronto, Mount Sinai Hospital, Samuel Lunenfeld Research Institute, Toronto, ON, Canada M5G 1X5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11486074" target="_blank"〉PubMed〈/a〉
    Keywords: Diagnosis ; *Disease/etiology ; *Genetic Predisposition to Disease ; Genetic Research ; *Genetic Variation ; *Genome, Human ; *Genomics ; Genotype ; Humans ; Mutation ; Phenotype ; Polymorphism, Genetic
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    Animal behavior. New data reveal the sisterhood of lions (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-07-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 2001 Jul 27;293(5530):589.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11474078" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Behavior, Animal ; Cooperative Behavior ; Female ; *Lions/physiology ; Male ; Maternal Behavior ; *Reproduction ; *Social Behavior ; Social Dominance ; Tanzania
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    Liver organogenesis promoted by endothelial cells prior to vascular function (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-09-29
    Description: The embryonic role of endothelial cells and nascent vessels in promoting organogenesis, prior to vascular function, is unclear. We find that early endothelial cells in mouse embryos surround newly specified hepatic endoderm and delimit the mesenchymal domain into which the liver bud grows. In flk-1 mutant embryos, which lack endothelial cells, hepatic specification occurs, but liver morphogenesis fails prior to mesenchyme invasion. We developed an embryo tissue explant system that permits liver bud vasculogenesis and show that in the absence of endothelial cells, or when the latter are inhibited, there is a selective defect in hepatic outgrowth. We conclude that vasculogenic endothelial cells and nascent vessels are critical for the earliest stages of organogenesis, prior to blood vessel function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matsumoto, K -- Yoshitomi, H -- Rossant, J -- Zaret, K S -- CA06297/CA/NCI NIH HHS/ -- GM36477/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Oct 19;294(5542):559-63. Epub 2001 Sep 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cell and Developmental Biology Program, Fox Chase Cancer Center, 7701 Burholme Avenue, Philadelphia, PA 19111, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11577199" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Vessels/cytology/embryology/physiology ; Culture Techniques ; *Embryonic Induction ; Endoderm/*physiology ; Endothelium, Vascular/cytology/embryology/*physiology ; Female ; Hepatocyte Growth Factor/antagonists & inhibitors/metabolism/pharmacology ; Hepatocytes/physiology ; Liver/blood supply/cytology/drug effects/*embryology ; Male ; Mesoderm/physiology ; Mice ; Mice, Inbred C3H ; *Mitogens ; Morphogenesis ; Mutation ; Neovascularization, Physiologic ; Receptor Protein-Tyrosine Kinases/genetics/physiology ; Receptors, Growth Factor/genetics/physiology ; Receptors, Vascular Endothelial Growth Factor ; Signal Transduction/drug effects
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    Preferential localization of effector memory cells in nonlymphoid tissue (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-27
    Description: Many intracellular pathogens infect a broad range of host tissues, but the importance of T cells for immunity in these sites is unclear because most of our understanding of antimicrobial T cell responses comes from analyses of lymphoid tissue. Here, we show that in response to viral or bacterial infection, antigen-specific CD8 T cells migrated to nonlymphoid tissues and were present as long-lived memory cells. Strikingly, CD8 memory T cells isolated from nonlymphoid tissues exhibited effector levels of lytic activity directly ex vivo, in contrast to their splenic counterparts. These results point to the existence of a population of extralymphoid effector memory T cells poised for immediate response to infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Masopust, D -- Vezys, V -- Marzo, A L -- Lefrancois, L -- AI41576/AI/NIAID NIH HHS/ -- DK45260/DK/NIDDK NIH HHS/ -- T32-AI07080/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2001 Mar 23;291(5512):2413-7. Epub 2001 Mar 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Immunology, Department of Medicine, University of Connecticut Health Center, Farmington, CT 06030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11264538" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CD8-Positive T-Lymphocytes/*immunology ; Cell Movement ; Cells, Cultured ; Flow Cytometry ; H-2 Antigens/immunology ; *Immunologic Memory ; Intestine, Small/immunology ; Listeria monocytogenes/genetics/immunology ; Listeriosis/*immunology ; Liver/immunology ; Lung/immunology ; Lymphocyte Activation ; Lymphoid Tissue/immunology ; Mice ; Mice, Inbred C57BL ; Ovalbumin/immunology ; Phenotype ; Rhabdoviridae Infections/*immunology ; T-Lymphocyte Subsets/*immunology ; Vesicular stomatitis Indiana virus/immunology
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    Climate change. Early birds may miss the worms (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 2001 Mar 30;291(5513):2532.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11286261" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Animals ; *Climate ; *Energy Metabolism ; Female ; *Food ; France ; Male ; Nesting Behavior ; *Reproduction ; Seasons ; Songbirds/*physiology
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    Dominant-negative mutants of a toxin subunit: an approach to therapy of anthrax (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-28
    Description: The protective antigen moiety of anthrax toxin translocates the toxin's enzymic moieties to the cytosol of mammalian cells by a mechanism that depends on its ability to heptamerize and insert into membranes. We identified dominant-negative mutants of protective antigen that co-assemble with the wild-type protein and block its ability to translocate the enzymic moieties across membranes. These mutants strongly inhibited toxin action in cell culture and in an animal intoxication model, suggesting that they could be useful in therapy of anthrax.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sellman, B R -- Mourez, M -- Collier, R J -- 5T32AI07410/AI/NIAID NIH HHS/ -- R37-AI22021/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2001 Apr 27;292(5517):695-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Molecular Genetics, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11326092" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anthrax/*drug therapy ; *Antigens, Bacterial ; Bacterial Toxins/*antagonists & inhibitors/*genetics/metabolism/toxicity ; CHO Cells ; Cell Membrane/metabolism ; Cricetinae ; Endocytosis ; Genes, Dominant ; Male ; *Mutation ; Protein Transport ; Rats ; Rats, Inbred F344 ; Receptors, Peptide/metabolism
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    Stem cell research has only just begun (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-07-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zuk, P A -- New York, N.Y. -- Science. 2001 Jul 13;293(5528):211-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11452974" target="_blank"〉PubMed〈/a〉
    Keywords: Adipocytes/*cytology ; Cell Differentiation ; Cell Line ; Hematopoietic Stem Cells ; Humans ; Lipectomy ; Mesoderm/cytology ; Research ; *Stem Cells
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    Recolonizing carnivores and naive prey: conservation lessons from Pleistocene extinctions (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-13
    Description: The current extinction of many of Earth's large terrestrial carnivores has left some extant prey species lacking knowledge about contemporary predators, a situation roughly parallel to that 10,000 to 50,000 years ago, when naive animals first encountered colonizing human hunters. Along present-day carnivore recolonization fronts, brown (also called grizzly) bears killed predator-naive adult moose at disproportionately high rates in Scandinavia, and moose mothers who lost juveniles to recolonizing wolves in North America's Yellowstone region developed hypersensitivity to wolf howls. Although prey that had been unfamiliar with dangerous predators for as few as 50 to 130 years were highly vulnerable to initial encounters, behavioral adjustments to reduce predation transpired within a single generation. The fact that at least one prey species quickly learns to be wary of restored carnivores should negate fears about localized prey extinction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Berger, J -- Swenson, J E -- Persson, I L -- New York, N.Y. -- Science. 2001 Feb 9;291(5506):1036-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, NV 89512, USA. berger@unr.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11161215" target="_blank"〉PubMed〈/a〉
    Keywords: Alaska ; Animals ; Arousal ; *Behavior, Animal ; *Carnivora ; *Conservation of Natural Resources ; Cues ; *Deer ; *Ecosystem ; Female ; Male ; Odors ; *Predatory Behavior ; Scandinavian and Nordic Countries ; Ursidae ; Vocalization, Animal ; Wolves ; Wyoming
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    Obesity research. Pot-bellied mice point to obesity enzyme (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gura, T -- New York, N.Y. -- Science. 2001 Dec 7;294(5549):2071-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11739926" target="_blank"〉PubMed〈/a〉
    Keywords: 11-beta-Hydroxysteroid Dehydrogenase Type 2 ; Abdomen ; Adipose Tissue/*enzymology/metabolism ; Animals ; Body Composition ; Diabetes Mellitus/enzymology/metabolism ; Enzyme Inhibitors/pharmacology ; Humans ; Hydrocortisone/blood/*metabolism ; Hydroxysteroid Dehydrogenases/antagonists & inhibitors/genetics/*metabolism ; Hypoglycemic Agents/pharmacology ; Male ; Metabolic Syndrome X ; Mice ; Mice, Transgenic ; Obesity/*enzymology/genetics/metabolism ; Skin
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    BAFF-R, a newly identified TNF receptor that specifically interacts with BAFF (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-18
    Description: B cell homeostasis has been shown to critically depend on BAFF, the B cell activation factor from the tumor necrosis factor (TNF) family. Although BAFF is already known to bind two receptors, BCMA and TACI, we have identified a third receptor for BAFF that we have termed BAFF-R. BAFF-R binding appears to be highly specific for BAFF, suggesting a unique role for this ligand-receptor interaction. Consistent with this, the BAFF-R locus is disrupted in A/WySnJ mice, which display a B cell phenotype qualitatively similar to that of the BAFF-deficient mice. Thus, BAFF-R appears to be the principal receptor for BAFF-mediated mature B cell survival.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thompson, J S -- Bixler, S A -- Qian, F -- Vora, K -- Scott, M L -- Cachero, T G -- Hession, C -- Schneider, P -- Sizing, I D -- Mullen, C -- Strauch, K -- Zafari, M -- Benjamin, C D -- Tschopp, J -- Browning, J L -- Ambrose, C -- New York, N.Y. -- Science. 2001 Sep 14;293(5537):2108-11. Epub 2001 Aug 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biogen, 12 Cambridge Center, Cambridge, MA 02142, USA., The Institute of Biochemistry, University of Lausanne, CH-1066, Epalinges, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11509692" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; B-Cell Activating Factor ; B-Cell Activation Factor Receptor ; B-Cell Maturation Antigen ; B-Lymphocytes/immunology/metabolism/*physiology ; Cell Line ; Chromosome Mapping ; Chromosomes, Human, Pair 22 ; Cloning, Molecular ; Homeostasis ; Humans ; Ligands ; Lymphoid Tissue/metabolism ; Male ; Membrane Proteins/*metabolism ; Mice ; Mice, Inbred A ; Mice, Inbred C57BL ; Molecular Sequence Data ; RNA, Messenger/chemistry/genetics/metabolism ; Receptors, Tumor Necrosis Factor/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Transfection ; Transmembrane Activator and CAML Interactor Protein ; Tumor Necrosis Factor-alpha/*metabolism
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    Expectation and dopamine release: mechanism of the placebo effect in Parkinson's disease (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-11
    Description: The power of placebos has long been recognized for improving numerous medical conditions such as Parkinson's disease (PD). Little is known, however, about the mechanism underlying the placebo effect. Using the ability of endogenous dopamine to compete for [11C]raclopride binding as measured by positron emission tomography, we provide in vivo evidence for substantial release of endogenous dopamine in the striatum of PD patients in response to placebo. Our findings indicate that the placebo effect in PD is powerful and is mediated through activation of the damaged nigrostriatal dopamine system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉de la Fuente-Fernandez, R -- Ruth, T J -- Sossi, V -- Schulzer, M -- Calne, D B -- Stoessl, A J -- New York, N.Y. -- Science. 2001 Aug 10;293(5532):1164-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Neurodegenerative Disorders Centre, TRIUMF, University of British Columbia, Vancouver, BC, Canada V6T 2B5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11498597" target="_blank"〉PubMed〈/a〉
    Keywords: Aged ; Antiparkinson Agents/administration & dosage/*therapeutic use ; Apomorphine/administration & dosage/*therapeutic use ; Corpus Striatum/*metabolism/radionuclide imaging ; Dopamine/*metabolism ; Female ; Humans ; Male ; Middle Aged ; Parkinson Disease/*drug therapy/metabolism ; *Placebo Effect ; Placebos/administration & dosage ; Raclopride/metabolism ; Synapses/metabolism ; Tomography, Emission-Computed
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    Ecology. Birds weigh risk before protecting their young (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-05-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 2001 Apr 20;292(5516):414-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11330277" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Argentina ; Arizona ; *Birds/physiology ; Female ; Male ; *Maternal Behavior ; *Nesting Behavior ; *Paternal Behavior ; Predatory Behavior ; Reproduction ; Risk ; Songbirds/physiology
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    Tracking the sexes by their genes (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 2001 Mar 2;291(5509):1733-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11249817" target="_blank"〉PubMed〈/a〉
    Keywords: Continental Population Groups/genetics ; Culture ; DNA, Mitochondrial/*genetics ; *Emigration and Immigration ; Ethnic Groups/genetics ; Female ; Genetic Markers ; *Genetics, Population ; Humans ; Male ; Mutation ; Sex Characteristics ; Y Chromosome/*genetics
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    Paleoanthropology. Skull study targets Africa-only origins (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 2001 Jan 12;291(5502):231.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11253829" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Australia ; *Biological Evolution ; Czech Republic ; Europe ; *Fossils ; *Hominidae ; Humans ; Indonesia ; Israel ; Male ; Matched-Pair Analysis ; Skull/*anatomy & histology
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    Haplotype diversity and linkage disequilibrium at human G6PD: recent origin of alleles that confer malarial resistance (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-26
    Description: The frequencies of low-activity alleles of glucose-6-phosphate dehydrogenase in humans are highly correlated with the prevalence of malaria. These "deficiency" alleles are thought to provide reduced risk from infection by the Plasmodium parasite and are maintained at high frequency despite the hemopathologies that they cause. Haplotype analysis of "A-" and "Med" mutations at this locus indicates that they have evolved independently and have increased in frequency at a rate that is too rapid to be explained by random genetic drift. Statistical modeling indicates that the A- allele arose within the past 3840 to 11,760 years and the Med allele arose within the past 1600 to 6640 years. These results support the hypothesis that malaria has had a major impact on humans only since the introduction of agriculture within the past 10,000 years and provide a striking example of the signature of selection on the human genome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tishkoff, S A -- Varkonyi, R -- Cahinhinan, N -- Abbes, S -- Argyropoulos, G -- Destro-Bisol, G -- Drousiotou, A -- Dangerfield, B -- Lefranc, G -- Loiselet, J -- Piro, A -- Stoneking, M -- Tagarelli, A -- Tagarelli, G -- Touma, E H -- Williams, S M -- Clark, A G -- G12-RR03032/RR/NCRR NIH HHS/ -- HL03321/HL/NHLBI NIH HHS/ -- T37-TW00043/TW/FIC NIH HHS/ -- New York, N.Y. -- Science. 2001 Jul 20;293(5529):455-62. Epub 2001 Jun 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Biology/Psychology Building, University of Maryland, College Park, MD 20742, USA. st130@umail.umd.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11423617" target="_blank"〉PubMed〈/a〉
    Keywords: Africa/epidemiology ; Agriculture ; Alleles ; Animals ; Endemic Diseases ; Evolution, Molecular ; Female ; *Genetic Variation ; Glucosephosphate Dehydrogenase/*genetics ; Glucosephosphate Dehydrogenase Deficiency/epidemiology/*genetics ; *Haplotypes ; Humans ; Immunity, Innate/genetics ; *Linkage Disequilibrium ; Malaria/enzymology/epidemiology/*genetics ; Malaria, Falciparum/enzymology/epidemiology/genetics ; Male ; Mediterranean Region/epidemiology ; Mutation ; Plasmodium falciparum/genetics ; Polymorphism, Restriction Fragment Length ; Selection, Genetic ; Time
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    A transgenic model for listeriosis: role of internalin in crossing the intestinal barrier (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-02
    Description: Listeria monocytogenes is responsible for severe food-borne infections, but the mechanisms by which bacteria cross the intestinal barrier are unknown. Listeria monocytogenes expresses a surface protein, internalin, that interacts with a host receptor, E-cadherin, to promote entry into human epithelial cells. Murine E-cadherin, in contrast to guinea pig E-cadherin, does not interact with internalin, excluding the mouse as a model for addressing internalin function in vivo. In guinea pigs and transgenic mice expressing human E-cadherin, internalin was found to mediate invasion of enterocytes and crossing of the intestinal barrier. These results illustrate how relevant animal models for human infections can be generated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lecuit, M -- Vandormael-Pournin, S -- Lefort, J -- Huerre, M -- Gounon, P -- Dupuy, C -- Babinet, C -- Cossart, P -- New York, N.Y. -- Science. 2001 Jun 1;292(5522):1722-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Unite des Interactions Bacteries-Cellules, Station Centrale de Microscopie Electronique, Institut Pasteur, 75724 Paris cedex 15, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11387478" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacterial Proteins/*metabolism ; Bacterial Translocation ; Cadherins/genetics/*metabolism ; Carrier Proteins/genetics ; Colony Count, Microbial ; *Disease Models, Animal ; Enterocytes/metabolism/*microbiology ; Fatty Acid-Binding Proteins ; Guinea Pigs ; Humans ; Intestinal Mucosa/microbiology/pathology ; Intestine, Small/microbiology/pathology ; Listeria monocytogenes/growth & development/metabolism/*pathogenicity ; Listeriosis/*microbiology/pathology ; Liver/microbiology/pathology ; Lymph Nodes/microbiology/pathology ; Male ; Mice ; Mice, Transgenic ; *Neoplasm Proteins ; *Nerve Tissue Proteins ; Promoter Regions, Genetic ; Spleen/microbiology/pathology ; Transgenes ; *Tumor Suppressor Proteins ; Virulence
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    Triallelic inheritance in Bardet-Biedl syndrome, a Mendelian recessive disorder (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-09-22
    Description: Bardet-Biedl syndrome (BBS) is a genetically heterogeneous disorder characterized by multiple clinical features that include pigmentary retinal dystrophy, polydactyly, obesity, developmental delay, and renal defects. BBS is considered an autosomal recessive disorder, and recent positional cloning efforts have identified two BBS genes (BBS2 and BBS6). We screened our cohort of 163 BBS families for mutations in both BBS2 and BBS6 and report the presence of three mutant alleles in affected individuals in four pedigrees. In addition, we detected unaffected individuals in two pedigrees who carry two BBS2 mutations but not a BBS6 mutation. We therefore propose that BBS may not be a single-gene recessive disease but a complex trait requiring three mutant alleles to manifest the phenotype. This triallelic model of disease transmission may be important in the study of both Mendelian and multifactorial disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Katsanis, N -- Ansley, S J -- Badano, J L -- Eichers, E R -- Lewis, R A -- Hoskins, B E -- Scambler, P J -- Davidson, W S -- Beales, P L -- Lupski, J R -- EY12666/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2001 Sep 21;293(5538):2256-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Human Genetics, The Texas Children's Hospital, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11567139" target="_blank"〉PubMed〈/a〉
    Keywords: *Alleles ; Bardet-Biedl Syndrome/*genetics ; Cohort Studies ; Female ; Genes, Recessive ; Haplotypes ; Humans ; Male ; Microsatellite Repeats ; *Multifactorial Inheritance ; Mutation ; Open Reading Frames ; Pedigree
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    Control of stem cell self-renewal in Drosophila spermatogenesis by JAK-STAT signaling (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: Stem cells, which regenerate tissue by producing differentiating cells, also produce cells that renew the stem cell population. Signals from regulatory microenvironments (niches) are thought to cause stem cells to retain self-renewing potential. However, the molecular characterization of niches remains an important goal. In Drosophila testes, germ line and somatic stem cells attach to a cluster of support cells called the hub. The hub specifically expresses Unpaired, a ligand activating the JAK-STAT (Janus kinase-signal transducer and activator of transcription) signaling cascade. Without JAK-STAT signaling, germ line stem cells differentiate but do not self-renew. Conversely, ectopic JAK-STAT signaling greatly expands both stem cell populations. We conclude that the support cells of the hub signal to adjacent stem cells by activation of the JAK-STAT pathway, thereby defining a niche for stem cell self-renewal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tulina, N -- Matunis, E -- R01 HD040307/HD/NICHD NIH HHS/ -- R01HD40307/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2546-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Embryology, Carnegie Institution of Washington, 115 West University Parkway, Baltimore, MD 21210, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752575" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Lineage ; Cell Survival ; Contractile Proteins/analysis ; DNA-Binding Proteins/genetics/*metabolism ; Drosophila/cytology/genetics/*physiology ; Drosophila Proteins/genetics/*metabolism ; Gene Expression ; Germ Cells/cytology/*physiology ; Glycoproteins/genetics/*metabolism ; Insect Proteins/genetics/metabolism ; Janus Kinases ; Ligands ; Male ; Microscopy, Confocal ; Mutation ; Protein-Tyrosine Kinases/genetics/*metabolism ; STAT Transcription Factors ; Signal Transduction ; Spermatogenesis ; Spermatogonia/physiology ; Stem Cells/cytology/*physiology ; Testis/cytology/metabolism ; Trans-Activators/genetics/*metabolism ; *Transcription Factors
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    Mammalian TOR: a homeostatic ATP sensor (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-03
    Description: The bacterial macrolide rapamycin is an efficacious anticancer agent against solid tumors. In a hypoxic environment, the increase in mass of solid tumors is dependent on the recruitment of mitogens and nutrients. When nutrient concentrations change, particularly those of essential amino acids, the mammalian Target of Rapamycin (mTOR) functions in regulatory pathways that control ribosome biogenesis and cell growth. In bacteria, ribosome biogenesis is independently regulated by amino acids and adenosine triphosphate (ATP). Here we demonstrate that the mTOR pathway is influenced by the intracellular concentration of ATP, independent of the abundance of amino acids, and that mTOR itself is an ATP sensor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dennis, P B -- Jaeschke, A -- Saitoh, M -- Fowler, B -- Kozma, S C -- Thomas, G -- New York, N.Y. -- Science. 2001 Nov 2;294(5544):1102-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, CH-4058, Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11691993" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing ; Adenosine Triphosphate/*metabolism ; Amino Acids/metabolism ; Androstadienes/pharmacology ; Carrier Proteins/metabolism ; Cell Line ; Deoxyglucose/pharmacology ; Enzyme Activation ; Homeostasis ; Humans ; Insulin/pharmacology ; Kinetics ; Phosphoproteins/metabolism ; Phosphorylation ; Protein Kinases/*metabolism ; RNA, Transfer, Amino Acyl/metabolism ; Recombinant Fusion Proteins/metabolism ; Ribosomal Protein S6 Kinases/antagonists & inhibitors/metabolism ; Ribosomes/metabolism ; Rotenone/pharmacology ; Signal Transduction ; Sirolimus/pharmacology ; TOR Serine-Threonine Kinases
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Archaeology. New trips through the back alleys of agriculture (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-05-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brown, K -- New York, N.Y. -- Science. 2001 Apr 27;292(5517):631-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11330315" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture/*history ; Animals ; *Animals, Domestic/genetics ; Cattle/genetics ; *Crops, Agricultural ; DNA, Mitochondrial/genetics ; Female ; *Fossils ; Goats ; History, Ancient ; Humans ; Male ; Zea mays
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    Bmf: a proapoptotic BH3-only protein regulated by interaction with the myosin V actin motor complex, activated by anoikis (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-09-08
    Description: Bcl-2 family members bearing only the BH3 domain are essential inducers of apoptosis. We identified a BH3-only protein, Bmf, and show that its BH3 domain is required both for binding to prosurvival Bcl-2 proteins and for triggering apoptosis. In healthy cells, Bmf is sequestered to myosin V motors by association with dynein light chain 2. Certain damage signals, such as loss of cell attachment (anoikis), unleash Bmf, allowing it to translocate and bind prosurvival Bcl-2 proteins. Thus, at least two mammalian BH3-only proteins, Bmf and Bim, function to sense intracellular damage by their localization to distinct cytoskeletal structures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Puthalakath, H -- Villunger, A -- O'Reilly, L A -- Beaumont, J G -- Coultas, L -- Cheney, R E -- Huang, D C -- Strasser, A -- CA 80188/CA/NCI NIH HHS/ -- R29 DC003299/DC/NIDCD NIH HHS/ -- New York, N.Y. -- Science. 2001 Sep 7;293(5536):1829-32.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Walter and Eliza Hall Institute of Medical Research, Melbourne, P.O. Royal Melbourne Hospital, 3050 VIC, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11546872" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptor Proteins, Signal Transducing ; Amino Acid Sequence ; Animals ; *Anoikis ; Apoptosis Regulatory Proteins ; Calmodulin-Binding Proteins/*metabolism ; Carrier Proteins/*chemistry/genetics/*metabolism ; Cell Line ; Cytoskeleton/metabolism ; *Drosophila Proteins ; Dyneins ; Gene Expression Profiling ; Humans ; *Membrane Proteins ; Mice ; Molecular Motor Proteins/*metabolism ; Molecular Sequence Data ; Mutation ; Myeloid Cell Leukemia Sequence 1 Protein ; *Myosin Type V ; Neoplasm Proteins/genetics/metabolism ; Nerve Tissue Proteins/*metabolism ; Protein Binding ; Protein Structure, Tertiary ; Protein Transport ; *Proto-Oncogene Proteins ; Proto-Oncogene Proteins c-bcl-2/chemistry/genetics/metabolism ; RNA, Messenger/analysis/genetics ; Transfection ; Two-Hybrid System Techniques
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    Transcription factor IID--not so basal after all (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-09-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Verrijzer, C P -- New York, N.Y. -- Science. 2001 Sep 14;293(5537):2010-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, MGC, Centre for Biomedical Genetics, Leiden University Medical Centre, Leiden, Netherlands. verrijzer@lumc.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11557865" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA-Binding Proteins/genetics/*metabolism ; Drosophila ; Drosophila Proteins ; Female ; *Gene Expression Regulation, Developmental ; Humans ; Male ; Mice ; Oligonucleotide Array Sequence Analysis ; Oogenesis ; Organ Specificity ; Ovarian Follicle/cytology/physiology ; Promoter Regions, Genetic ; Spermatogenesis ; *TATA-Binding Protein Associated Factors ; TATA-Box Binding Protein ; Telomeric Repeat Binding Protein 2 ; Transcription Factor TFIID ; Transcription Factors/genetics/*metabolism ; Transcription Factors, TFII/genetics/*metabolism ; *Transcription, Genetic
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    Requirement of CHROMOMETHYLASE3 for maintenance of CpXpG methylation (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-05-12
    Description: Epigenetic silenced alleles of the Arabidopsis SUPERMAN locus (the clark kent alleles) are associated with dense hypermethylation at noncanonical cytosines (CpXpG and asymmetric sites, where X = A, T, C, or G). A genetic screen for suppressors of a hypermethylated clark kent mutant identified nine loss-of-function alleles of CHROMOMETHYLASE3 (CMT3), a novel cytosine methyltransferase homolog. These cmt3 mutants display a wild-type morphology but exhibit decreased CpXpG methylation of the SUP gene and of other sequences throughout the genome. They also show reactivated expression of endogenous retrotransposon sequences. These results show that a non-CpG DNA methyltransferase is responsible for maintaining epigenetic gene silencing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lindroth, A M -- Cao, X -- Jackson, J P -- Zilberman, D -- McCallum, C M -- Henikoff, S -- Jacobsen, S E -- GM07104/GM/NIGMS NIH HHS/ -- GM07185/GM/NIGMS NIH HHS/ -- GM29009/GM/NIGMS NIH HHS/ -- GM60398/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Jun 15;292(5524):2077-80. Epub 2001 May 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11349138" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Arabidopsis/*genetics/metabolism ; *Arabidopsis Proteins ; Base Sequence ; Chromosome Mapping ; Cloning, Molecular ; CpG Islands ; Crosses, Genetic ; Cytosine/metabolism ; *DNA Methylation ; DNA-Cytosine Methylases/chemistry/*genetics/*metabolism ; Dinucleoside Phosphates/metabolism ; Gene Expression Regulation, Plant ; *Gene Silencing ; Genes, Plant ; Molecular Sequence Data ; Mutagenesis ; Oligonucleotides/*metabolism ; Phenotype ; Protein Structure, Tertiary ; Retroelements ; Transcription Factors/*genetics
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    A ribonucleotide reductase homolog of cytomegalovirus and endothelial cell tropism (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: Human cytomegalovirus infects vascular tissues and has been associated with atherogenesis and coronary restenosis. Although established laboratory strains of human cytomegalovirus have lost the ability to grow on vascular endothelial cells, laboratory strains of murine cytomegalovirus retain this ability. With the use of a forward-genetic procedure involving random transposon mutagenesis and rapid phenotypic screening, we identified a murine cytomegalovirus gene governing endothelial cell tropism. This gene, M45, shares sequence homology to ribonucleotide reductase genes. Endothelial cells infected with M45-mutant viruses rapidly undergo apoptosis, suggesting that a viral strategy to evade destruction by cellular apoptosis is indispensable for viral growth in endothelial cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brune, W -- Menard, C -- Heesemann, J -- Koszinowski, U H -- New York, N.Y. -- Science. 2001 Jan 12;291(5502):303-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA. wbrune@princeton.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11209080" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; Apoptosis ; Base Sequence ; Cell Line ; Cytopathogenic Effect, Viral ; DNA Transposable Elements ; Endothelium, Vascular/*cytology/*virology ; Fibroblasts/virology ; Frameshift Mutation ; Gene Library ; *Genes, Viral ; Mice ; Molecular Sequence Data ; Muromegalovirus/*genetics/growth & development/*physiology ; Mutagenesis, Insertional ; Open Reading Frames ; Phenotype ; Ribonucleotide Reductases/*genetics/physiology ; *Viral Proteins ; Virus Replication
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    Stem cell policy. An embryonic alternative (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2001 Jun 8;292(5523):1822.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11397926" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animal Experimentation ; Animals ; *Bioethics ; Cell Line ; *Embryo Research ; Embryo, Mammalian/*cytology ; Humans ; *Macaca mulatta ; *Research ; *Stem Cells
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    Developmental biology. The hottest stem cells are also the toughest (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-05-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2001 Apr 20;292(5516):429.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11330290" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Culture Techniques ; Cell Differentiation ; Cell Line ; Collagen ; Culture Media, Conditioned ; Drug Combinations ; Epithelial Cells/cytology/metabolism ; Genetic Engineering ; Green Fluorescent Proteins ; Hepatocytes/cytology/metabolism ; Humans ; Laminin ; Luminescent Proteins/biosynthesis ; Mice ; Neurons/cytology/metabolism ; Proteoglycans ; Stem Cell Transplantation ; Stem Cells/*cytology
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    Widespread origins of domestic horse lineages (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-13
    Description: Domestication entails control of wild species and is generally regarded as a complex process confined to a restricted area and culture. Previous DNA sequence analyses of several domestic species have suggested only a limited number of origination events. We analyzed mitochondrial DNA (mtDNA) control region sequences of 191 domestic horses and found a high diversity of matrilines. Sequence analysis of equids from archaeological sites and late Pleistocene deposits showed that this diversity was not due to an accelerated mutation rate or an ancient domestication event. Consequently, high mtDNA sequence diversity of horses implies an unprecedented and widespread integration of matrilines and an extensive utilization and taming of wild horses. However, genetic variation at nuclear markers is partitioned among horse breeds and may reflect sex-biased dispersal and breeding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vila, C -- Leonard, J A -- Gotherstrom, A -- Marklund, S -- Sandberg, K -- Liden, K -- Wayne, R K -- Ellegren, H -- New York, N.Y. -- Science. 2001 Jan 19;291(5503):474-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Evolutionary Biology, Uppsala University, Norbyvagen 18D, S-75236 Uppsala, Sweden. carles.vila@ebc.uu.se〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11161199" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animal Husbandry ; Animals ; Animals, Domestic/*genetics ; Animals, Wild/genetics ; Biological Evolution ; Breeding ; DNA, Mitochondrial/*genetics ; Female ; *Fossils ; *Genetic Variation ; Genetics, Population ; Haplotypes ; Horses/*genetics ; Male ; Microsatellite Repeats ; Pedigree
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    Endangered species. Cloned gaur a short-lived success (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2001 Jan 19;291(5503):409.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11228123" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cattle ; *Cloning, Organism ; Clostridium Infections/*veterinary ; *Clostridium perfringens ; Diarrhea/microbiology/*veterinary ; Female ; Male ; *Ruminants
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    Sequence interpretation. Functional annotation of mouse genome sequences (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nadeau, J H -- Balling, R -- Barsh, G -- Beier, D -- Brown, S D -- Bucan, M -- Camper, S -- Carlson, G -- Copeland, N -- Eppig, J -- Fletcher, C -- Frankel, W N -- Ganten, D -- Goldowitz, D -- Goodnow, C -- Guenet, J L -- Hicks, G -- Hrabe de Angelis, M -- Jackson, I -- Jacob, H J -- Jenkins, N -- Johnson, D -- Justice, M -- Kay, S -- Kingsley, D -- Lehrach, H -- Magnuson, T -- Meisler, M -- Poustka, A -- Rinchik, E M -- Rossant, J -- Russell, L B -- Schimenti, J -- Shiroishi, T -- Skarnes, W C -- Soriano, P -- Stanford, W -- Takahashi, J S -- Wurst, W -- Zimmer, A -- International Mouse Mutagenesis Consortium -- New York, N.Y. -- Science. 2001 Feb 16;291(5507):1251-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, BRB 624, Case Western Reserve University School of Medicine, 10900 Euclid Avenue, Cleveland, OH 44106, USA. jhn4@po.cwru.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11233449" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosome Mapping ; *Computational Biology ; Costs and Cost Analysis ; Genes/physiology ; Genetic Techniques ; *Genome ; *Genomics ; International Cooperation ; Mice/*genetics ; Mutagenesis ; Mutation ; Phenotype ; Private Sector ; Public Sector ; Research Support as Topic ; *Sequence Analysis, DNA
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    Evolution. Nota bene. Wolbachia and wasp evolution (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, O -- New York, N.Y. -- Science. 2001 Mar 2;291(5509):1719.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11253199" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Female ; Fertility ; Male ; Reproduction ; Species Specificity ; *Symbiosis ; Wasps/*microbiology/*physiology ; Wolbachia/*physiology
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    The ground state of the ventral appendage in Drosophila (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-25
    Description: In Drosophila melanogaster, the antennae, legs, genitalia, and analia make up a serially homologous set of ventral appendages that depend on different selector genes for their unique identities. The diversity among these structures implies that there is a common ground state that selector genes modify to generate these different appendage morphologies. Here we show that the ventral appendage that forms in the absence of selector gene activity is leglike but consists of only two segments along its proximo-distal axis: a proximal segment and a distal tarsus. These results raise the possibility that, during evolution, leglike appendages could have developed without selector gene activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Casares, F -- Mann, R S -- R01 GM058575/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Aug 24;293(5534):1477-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biophysics, Columbia University, 701 West 168 Street, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11520984" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antennapedia Homeodomain Protein ; Biological Evolution ; Calcium-Binding Proteins ; *Drosophila Proteins ; Drosophila melanogaster/anatomy & histology/*genetics/*growth & development ; Epistasis, Genetic ; Extremities/growth & development ; *Gene Expression Regulation, Developmental ; *Genes, Homeobox ; Genes, Insect ; Glycosyltransferases/genetics/metabolism ; Homeodomain Proteins/*genetics/physiology ; Insect Proteins/genetics ; Intercellular Signaling Peptides and Proteins ; Intracellular Signaling Peptides and Proteins ; Ligands ; Membrane Proteins/genetics/metabolism ; Mutation ; *N-Acetylglucosaminyltransferases ; *Nuclear Proteins ; Phenotype ; Receptors, Notch ; Sense Organs/growth & development ; Signal Transduction ; *Transcription Factors
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    Gene therapy. Repair kits for faulty genes (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ferber, D -- New York, N.Y. -- Science. 2001 Nov 23;294(5547):1639.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11721030" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; DNA/chemistry/genetics/metabolism ; DNA Repair/drug effects/*genetics ; Dependovirus/genetics ; Gene Targeting/*methods ; Genetic Diseases, Inborn/*genetics/*therapy ; Genetic Therapy/*methods/trends ; Humans ; Mice ; Mutation/*genetics ; Oligonucleotides/chemistry/genetics/metabolism/pharmacology ; Point Mutation/genetics ; Recombination, Genetic/drug effects/genetics ; Sequence Homology, Nucleic Acid
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    Nuclear cloning and epigenetic reprogramming of the genome (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-11
    Description: Cloning of mammals by nuclear transfer (NT) results in gestational or neonatal failure with at most a few percent of manipulated embryos resulting in live births. Many of those that survive to term succumb to a variety of abnormalities that are likely due to inappropriate epigenetic reprogramming. Cloned embryos derived from donors, such as embryonic stem cells, that may require little or no reprogramming of early developmental genes develop substantially better beyond implantation than NT clones derived from somatic cells. Although recent experiments have demonstrated normal reprogramming of telomere length and X chromosome inactivation, epigenetic information established during gametogenesis, such as gametic imprints, cannot be restored after nuclear transfer. Survival of cloned animals to birth and beyond, despite substantial transcriptional dysregulation, is consistent with mammalian development being rather tolerant to epigenetic abnormalities, with lethality resulting only beyond a threshold of faulty gene reprogramming encompassing multiple loci.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rideout , W M 3rd -- Eggan, K -- Jaenisch, R -- New York, N.Y. -- Science. 2001 Aug 10;293(5532):1093-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research and, Department of Biology, Massachusetts Institute of Technology, 9 Cambridge Center, Cambridge, MA 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11498580" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; Cell Nucleus/*genetics/metabolism ; *Cloning, Organism ; DNA Methylation ; Dosage Compensation, Genetic ; Embryo, Mammalian/cytology/*physiology ; *Embryo, Nonmammalian ; *Embryonic and Fetal Development ; Female ; Gametogenesis ; *Gene Expression Regulation, Developmental ; Genomic Imprinting ; Germ Cells/cytology/physiology ; Male ; Nuclear Transfer Techniques ; Phenotype ; Stem Cells/cytology/physiology ; Telomere/physiology/ultrastructure
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    General contentment masks gender gap in first AAAS salary and job survey (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-10-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 2001 Oct 12;294(5541):396-411.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11598304" target="_blank"〉PubMed〈/a〉
    Keywords: Academic Medical Centers ; *Biological Science Disciplines ; Career Choice ; Career Mobility ; Education, Graduate ; *Employment ; Faculty ; Female ; Humans ; *Job Satisfaction ; Male ; Private Sector ; Public Sector ; Research ; *Research Personnel/economics ; *Salaries and Fringe Benefits ; *Surveys and Questionnaires ; Teaching ; United States ; Universities ; Women, Working
    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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    Living with genome instability: plant responses to telomere dysfunction (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-07
    Description: Loss of telomere function in metazoans results in catastrophic damage to the genome, cell cycle arrest, and apoptosis. Here we show that the mustard weed Arabidopsis thaliana can survive up to 10 generations without telomerase. The last five generations of telomerase-deficient plants endured increasing levels of cytogenetic damage, which was correlated with developmental anomalies in both vegetative and reproductive organs. Mutants ultimately arrested at a terminal vegetative state harboring shoot meristems that were grossly enlarged, disorganized, and in some cases, dedifferentiated into a callusoid mass. Unexpectedly, late-generation mutants had an extended life-span and remained metabolically active. The differences in plant and animal responses to dysfunctional telomeres may reflect the more plastic nature of plant development and genome organization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Riha, K -- McKnight, T D -- Griffing, L R -- Shippen, D E -- New York, N.Y. -- Science. 2001 Mar 2;291(5509):1797-800.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, 2128 TAMU, Texas A&M University, College Station, TX 77843-2128, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11230697" target="_blank"〉PubMed〈/a〉
    Keywords: Anaphase ; Apoptosis ; Arabidopsis/anatomy & histology/genetics/growth & development/*physiology ; Cell Differentiation ; Cell Division ; *Genome, Plant ; Meristem/anatomy & histology/cytology/growth & development ; Mitotic Index ; Mutation ; Phenotype ; Plant Leaves/anatomy & histology/cytology/growth & development ; Plant Structures/anatomy & histology/cytology/growth & development ; Telomerase/genetics/*metabolism ; Telomere/*physiology/ultrastructure
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Genetics. Fragile X's missing partners identified (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sohn, E -- New York, N.Y. -- Science. 2001 Nov 30;294(5548):1809.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11729277" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Disease Models, Animal ; Drosophila melanogaster/genetics/metabolism ; Fragile X Mental Retardation Protein ; Fragile X Syndrome/*etiology/genetics/*metabolism ; *Gene Expression Regulation ; Gene Library ; Humans ; Mice ; Microtubule-Associated Proteins/genetics/*metabolism ; Mutation/genetics ; Nerve Tissue Proteins/*metabolism ; Phenotype ; RNA, Messenger/chemistry/genetics/metabolism ; RNA-Binding Proteins/*metabolism ; Up-Regulation
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Neuroanatomy of magnetoreception: the superior colliculus involved in magnetic orientation in a mammal (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-10-13
    Description: The neural substrate subserving magnetic orientation is largely unknown in vertebrates and unstudied in mammals. We combined a behavioral test for magnetic compass orientation in mole rats and immunocytochemical visualization of the transcription factor c-Fos as a marker of neuronal activity. We found that the superior colliculus of the Zambian mole rat (Cryptomys anselli) contains neurons that are responsive to magnetic stimuli. These neurons are directionally selective and organized within a discrete sublayer. Our results constitute evidence for the involvement of a specific mammalian brain structure in magnetoreception.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nemec, P -- Altmann, J -- Marhold, S -- Burda, H -- Oelschlager, H H -- New York, N.Y. -- Science. 2001 Oct 12;294(5541):366-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, Charles University, CZ-128 44 Prague, Czech Republic. pgnemec@natur.cuni.cz〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11598299" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Behavior, Animal ; Brain Mapping ; Efferent Pathways ; Female ; Immunohistochemistry ; *Magnetics ; Male ; Mole Rats/anatomy & histology/*physiology ; Nesting Behavior ; Neurons/metabolism/*physiology ; *Orientation ; Proto-Oncogene Proteins c-fos/metabolism ; Superior Colliculi/cytology/metabolism/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Chromatin docking and exchange activity enhancement of RCC1 by histones H2A and H2B (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-05-26
    Description: The Ran guanosine triphosphatase (GTPase) controls nucleocytoplasmic transport, mitotic spindle formation, and nuclear envelope assembly. These functions rely on the association of the Ran-specific exchange factor, RCC1 (regulator of chromosome condensation 1), with chromatin. We find that RCC1 binds directly to mononucleosomes and to histones H2A and H2B. RCC1 utilizes these histones to bind Xenopus sperm chromatin, and the binding of RCC1 to nucleosomes or histones stimulates the catalytic activity of RCC1. We propose that the docking of RCC1 to H2A/H2B establishes the polarity of the Ran-GTP gradient that drives nuclear envelope assembly, nuclear transport, and other nuclear events.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nemergut, M E -- Mizzen, C A -- Stukenberg, T -- Allis, C D -- Macara, I G -- GM-50526/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 May 25;292(5521):1540-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Cell Signaling, University of Virginia, Charlottesville, VA 22908, USA. men5w@virginia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11375490" target="_blank"〉PubMed〈/a〉
    Keywords: Active Transport, Cell Nucleus ; Animals ; Catalysis ; *Cell Cycle Proteins ; Cell Nucleus/metabolism ; Chickens ; Chromatin/*metabolism ; DNA/metabolism ; DNA-Binding Proteins/*metabolism ; Dimerization ; *Guanine Nucleotide Exchange Factors ; Guanosine Diphosphate/metabolism ; Guanosine Triphosphate/metabolism ; HeLa Cells ; Histones/*metabolism ; Humans ; Male ; Nuclear Envelope/metabolism ; *Nuclear Proteins ; Nucleosomes/*metabolism ; Recombinant Fusion Proteins/metabolism ; Spermatozoa ; Xenopus Proteins ; Xenopus laevis ; ran GTP-Binding Protein/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    U.S. Congress. Would cloning ban affect stem cells? (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 2001 Aug 10;293(5532):1025.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11498550" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Cloning, Organism/*legislation & jurisprudence ; Embryo Research ; Embryo, Mammalian/*cytology ; Humans ; Politics ; *Research ; *Stem Cells ; United States
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    gamma -Secretase cleavage and nuclear localization of ErbB-4 receptor tyrosine kinase (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-10-27
    Description: ErbB-4 is a transmembrane receptor tyrosine kinase that regulates cell proliferation and differentiation. After binding of its ligand heregulin (HRG) or activation of protein kinase C (PKC) by 12-O-tetradecanoylphorbol-13-acetate (TPA), the ErbB-4 ectodomain is cleaved by a metalloprotease. We now report a subsequent cleavage by gamma-secretase that releases the ErbB-4 intracellular domain from the membrane and facilitates its translocation to the nucleus. gamma-Secretase cleavage was prevented by chemical inhibitors or a dominant negative presenilin. Inhibition of gamma-secretase also prevented growth inhibition by HRG. gamma-Secretase cleavage of ErbB-4 may represent another mechanism for receptor tyrosine kinase-mediated signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ni, C Y -- Murphy, M P -- Golde, T E -- Carpenter, G -- CA24071/CA/NCI NIH HHS/ -- CA68485/CA/NCI NIH HHS/ -- DK20593/DK/NIDDK NIH HHS/ -- NS39072/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2001 Dec 7;294(5549):2179-81. Epub 2001 Oct 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11679632" target="_blank"〉PubMed〈/a〉
    Keywords: Active Transport, Cell Nucleus ; Amino Acid Sequence ; Amyloid Precursor Protein Secretases ; Animals ; Aspartic Acid Endopeptidases ; COS Cells ; Carbamates/pharmacology ; Cell Division/drug effects ; Cell Line ; Cell Membrane/metabolism ; Cell Nucleus/*metabolism ; Cytoplasm/metabolism ; Dipeptides/pharmacology ; Endopeptidases/*metabolism ; Fatty Acids, Unsaturated/pharmacology ; Humans ; Membrane Proteins/genetics/metabolism ; Metalloendopeptidases/metabolism ; Mice ; Molecular Sequence Data ; Mutation ; Neuregulin-1/pharmacology ; Presenilin-1 ; Protease Inhibitors/pharmacology ; Protein Structure, Tertiary ; Receptor, Epidermal Growth Factor/chemistry/*metabolism ; Receptor, ErbB-4 ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Tetradecanoylphorbol Acetate/pharmacology ; Transcriptional Activation ; Tumor Cells, Cultured
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    A novel mechanism for evolution? (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-10-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Adler, M J -- New York, N.Y. -- Science. 2001 Oct 5;294(5540):53-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11589230" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Gene Expression Regulation ; Humans ; Mutation ; Phenotype ; RNA, Messenger/*genetics/metabolism ; Selection, Genetic
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    Differentiation of embryonic stem cell lines generated from adult somatic cells by nuclear transfer (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-28
    Description: Embryonic stem (ES) cells are fully pluripotent in that they can differentiate into all cell types, including gametes. We have derived 35 ES cell lines via nuclear transfer (ntES cell lines) from adult mouse somatic cells of inbred, hybrid, and mutant strains. ntES cells contributed to an extensive variety of cell types, including dopaminergic and serotonergic neurons in vitro and germ cells in vivo. Cloning by transfer of ntES cell nuclei could result in normal development of fertile adults. These studies demonstrate the full pluripotency of ntES cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wakayama, T -- Tabar, V -- Rodriguez, I -- Perry, A C -- Studer, L -- Mombaerts, P -- New York, N.Y. -- Science. 2001 Apr 27;292(5517):740-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Rockefeller University, New York, NY 10021, USA. teru@advancedcell.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11326103" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blastocyst/*cytology ; *Cell Differentiation ; Cell Line ; Cell Lineage ; Chimera ; Cloning, Organism ; Crosses, Genetic ; Dopamine/metabolism ; Embryo Transfer ; Female ; Germ Cells/*cytology ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Inbred DBA ; Mice, Inbred ICR ; Mice, Nude ; Neurons/*cytology ; *Nuclear Transfer Techniques ; Serotonin/metabolism ; Stem Cells/*cytology
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    Imprinting and the epigenetic asymmetry between parental genomes (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-11
    Description: Genomic imprinting confers a developmental asymmetry on the parental genomes, through epigenetic modifications in the germ line and embryo. These heritable modifications regulate the monoallelic activity of parental alleles resulting in their functional differences during development. Specific cis-acting regulatory elements associated with imprinted genes carry modifications involving chromatin structural changes and DNA methylation. Some of these modifications are initiated in the germ line. Comparative genomic analysis at imprinted domains is emerging as a powerful tool for the identification of conserved elements amenable to more detailed functional analysis, and for providing insight into the emergence of imprinting during the evolution of mammalian species. Genomic imprinting therefore provides a model system for the analysis of the epigenetic control of genome function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ferguson-Smith, A C -- Surani, M A -- New York, N.Y. -- Science. 2001 Aug 10;293(5532):1086-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anatomy, University of Cambridge, Downing Street, Cambridge, CB2 3DY, UK. afsmith@mole.bio.cam.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11498578" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; DNA Methylation ; Embryonic and Fetal Development ; Evolution, Molecular ; Female ; Gametogenesis ; *Gene Expression Regulation, Developmental ; Gene Silencing ; *Genomic Imprinting ; Germ Cells/*metabolism ; Humans ; Male ; Oocytes/metabolism ; RNA, Antisense/genetics ; Regulatory Sequences, Nucleic Acid ; Zygote/metabolism
    Print ISSN: 0036-8075
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    A role for the RNase III enzyme DCR-1 in RNA interference and germ line development in Caenorhabditis elegans (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-04
    Description: An early event in RNA interference (RNAi) is the cleavage of the initiating double-stranded RNA (dsRNA) to short pieces, 21 to 23 nucleotides in length. Here we describe a null mutation in dicer-1 (dcr-1), a gene proposed to encode the enzyme that generates these short RNAs. We find that dcr-1(-/-) animals have defects in RNAi under some, but not all, conditions. Mutant animals have germ line defects that lead to sterility, suggesting that cleavage of dsRNA to short pieces is a requisite event in normal development.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1855227/" 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/PMC1855227/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Knight, S W -- Bass, B L -- R01 GM044073/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Sep 21;293(5538):2269-71. Epub 2001 Aug 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Howard Hughes Medical Institute, University of Utah, 50 North Medical Drive, Room 211, Salt Lake City, UT 84132, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11486053" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Genetically Modified ; Caenorhabditis elegans/cytology/*enzymology/*genetics/growth & development ; Cell Differentiation ; Disorders of Sex Development ; Endoribonucleases/genetics/*metabolism ; Female ; *Gene Silencing ; Genes, Helminth ; Germ Cells/*cytology/metabolism ; Male ; Mutation ; Oocytes/cytology ; Phenotype ; RNA, Double-Stranded/*genetics/*metabolism ; RNA, Helminth/genetics/metabolism ; RNA, Messenger/genetics/metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; Ribonuclease III ; Sequence Deletion
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    China's census. National count reveals major societal changes (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walfish, D -- New York, N.Y. -- Science. 2001 Jun 8;292(5523):1823.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11397927" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; *Censuses ; China ; Family Characteristics ; Female ; Humans ; Male ; *Population Density ; *Population Dynamics ; Rural Population ; Sex Ratio ; Urban Population
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    UDP-glucose dehydrogenase required for cardiac valve formation in zebrafish (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-09-05
    Description: Cardiac valve formation is a complex process that involves cell signaling events between the myocardial and endocardial layers of the heart across an elaborate extracellular matrix. These signals lead to marked morphogenetic movements and transdifferentiation of the endocardial cells at chamber boundaries. Here we identify the genetic defect in zebrafish jekyll mutants, which are deficient in the initiation of heart valve formation. The jekyll mutation disrupts a homolog of Drosophila Sugarless, a uridine 5'-diphosphate (UDP)-glucose dehydrogenase required for heparan sulfate, chondroitin sulfate, and hyaluronic acid production. The atrioventricular border cells do not differentiate from their neighbors in jekyll mutants, suggesting that Jekyll is required in a cell signaling event that establishes a boundary between the atrium and ventricle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walsh, E C -- Stainier, D Y -- HL54737/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2001 Aug 31;293(5535):1670-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, Programs in Developmental Biology, Genetics and Human Genetics, University of California, San Francisco, CA 94143-0448, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11533493" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antisense Elements (Genetics) ; Body Patterning ; Bone Morphogenetic Proteins/genetics ; Endocardium/embryology/metabolism ; Female ; Gene Expression ; Glycosaminoglycans/metabolism ; Heart/*embryology ; Heart Valves/cytology/*embryology/enzymology/metabolism ; Male ; Molecular Sequence Data ; Morphogenesis ; Mutation ; Myocardium/cytology/metabolism ; Phenotype ; Physical Chromosome Mapping ; Signal Transduction ; Uridine Diphosphate Glucose Dehydrogenase/*genetics/*metabolism ; Zebrafish/*embryology/genetics
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    Parent-offspring coadaptation and the dual genetic control of maternal care (2001)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2001-06-02
    Description: In many animal species, the amount of care provided by parents is determined through a complex interaction of offspring signals and responses by parents to those signals. As predicted by honest signaling theory, we show that in the burrower bug, Sehirus cinctus, maternal provisioning responds to experimental manipulations of offspring condition. Despite this predicted environmental influence, we find evidence from two cross-foster experiments that variation in maternal care also stems from two distinct genetic sources: variation among offspring in their ability to elicit care and variation among parents in their response to offspring signals. Furthermore, as predicted by maternal-offspring coadaptation theory, offspring signaling is negatively genetically correlated with maternal provisioning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Agrawal, A F -- Brodie, E D 3rd -- Brown, J -- New York, N.Y. -- Science. 2001 Jun 1;292(5522):1710-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology and Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, IN 47405-3700, USA. aagrawal@bio.indiana.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11387474" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptation, Physiological ; Animals ; Biological Evolution ; Cues ; Feeding Behavior ; Female ; *Genetic Variation ; Hemiptera/*genetics/*physiology ; *Maternal Behavior ; Phenotype
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    Transgenic monkeys produced by retroviral gene transfer into mature oocytes (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-24
    Description: Transgenic rhesus monkeys carrying the green fluorescent protein (GFP) gene were produced by injecting pseudotyped replication-defective retroviral vector into the perivitelline space of 224 mature rhesus oocytes, later fertilized by intracytoplasmic sperm injection. Of the three males born from 20 embryo transfers, one was transgenic when accessible tissues were assayed for transgene DNA and messenger RNA. All tissues that were studied from a fraternal set of twins, miscarried at 73 days, carried the transgene, as confirmed by Southern analyses, and the GFP transgene reporter was detected by both direct and indirect fluorescence imaging.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chan, A W -- Chong, K Y -- Martinovich, C -- Simerly, C -- Schatten, G -- New York, N.Y. -- Science. 2001 Jan 12;291(5502):309-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Oregon Regional Primate Research Center, Center for Women's Health, and Departments of Cell-Developmental Biology and Obstetrics-Gynecology, Oregon Health Sciences University, 505 NW 185th Avenue, Beaverton, OR 97006, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11209082" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Animals, Genetically Modified ; Animals, Newborn ; Blotting, Southern ; Embryo Transfer ; Embryonic and Fetal Development ; Female ; Fluorescent Antibody Technique ; Gene Expression ; *Gene Transfer Techniques ; *Gene Transfer, Horizontal ; Genetic Vectors ; Green Fluorescent Proteins ; Luminescent Proteins/*genetics ; Macaca mulatta/*genetics ; Male ; Moloney murine leukemia virus/genetics ; Oocytes ; Polymerase Chain Reaction ; Pregnancy ; Pregnancy Outcome ; Sperm Injections, Intracytoplasmic ; Transgenes
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    Genetic evidence for two species of elephant in Africa (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-25
    Description: Elephants from the tropical forests of Africa are morphologically distinct from savannah or bush elephants. Dart-biopsy samples from 195 free-ranging African elephants in 21 populations were examined for DNA sequence variation in four nuclear genes (1732 base pairs). Phylogenetic distinctions between African forest elephant and savannah elephant populations corresponded to 58% of the difference in the same genes between elephant genera Loxodonta (African) and Elephas (Asian). Large genetic distance, multiple genetically fixed nucleotide site differences, morphological and habitat distinctions, and extremely limited hybridization of gene flow between forest and savannah elephants support the recognition and conservation management of two African species: Loxodonta africana and Loxodonta cyclotis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roca, A L -- Georgiadis, N -- Pecon-Slattery, J -- O'Brien, S J -- New York, N.Y. -- Science. 2001 Aug 24;293(5534):1473-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genomic Diversity, National Cancer Institute, Frederick, MD 21702, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11520983" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Animals ; Biological Evolution ; Cell Nucleus/genetics ; Conservation of Natural Resources ; Elephants/anatomy & histology/*classification/*genetics ; Environment ; Exons ; Female ; Founder Effect ; *Genetic Variation ; Genetics, Population ; Genotype ; Haplotypes ; Hybridization, Genetic ; Introns ; Male ; Phylogeny ; Sequence Analysis, DNA ; Terminology as Topic ; Trees
    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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    Essays on science and society. Is a new eugenics afoot? (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-10-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Allen, G E -- New York, N.Y. -- Science. 2001 Oct 5;294(5540):59-61.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Washington University, St. Louis, MO 63130, USA. allen@biology.wustl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11588239" target="_blank"〉PubMed〈/a〉
    Keywords: Eugenics/*history/legislation & jurisprudence ; Female ; Genetics, Medical/*history ; History, 19th Century ; History, 20th Century ; History, 21st Century ; Humans ; Male ; Pedigree ; Reproduction ; Social Problems/*history ; Western World
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  • 88
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    Direct interaction of Arabidopsis cryptochromes with COP1 in light control development (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-18
    Description: Arabidopsis seedling photomorphogenesis involves two antagonistically acting components, COP1 and HY5. COP1 specifically targets HY5 for degradation via the 26S proteasome in the dark through their direct physical interaction. Little is known regarding how light signals perceived by photoreceptors are transduced to regulate COP1. Arabidopsis has two related cryptochromes (cry1 and cry2) mediating various blue/ultraviolet-A light responses. Here we show that both photoactivated cryptochromes repress COP1 activity through a direct protein-protein contact and that this direct regulation is primarily responsible for the cryptochrome-mediated blue light regulation of seedling photomorphogenic development and genome expression profile.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, H -- Ma, L G -- Li, J M -- Zhao, H Y -- Deng, X W -- GM-47850/GM/NIGMS NIH HHS/ -- GM59507/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Oct 5;294(5540):154-8. Epub 2001 Aug 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11509693" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/genetics/*growth & development/*metabolism ; *Arabidopsis Proteins ; Basic-Leucine Zipper Transcription Factors ; Carrier Proteins/chemistry/genetics/*metabolism ; Cell Nucleus/metabolism ; Crosses, Genetic ; Cryptochromes ; Darkness ; *Drosophila Proteins ; Expressed Sequence Tags ; *Eye Proteins ; Flavoproteins/genetics/*metabolism ; Gene Expression Profiling ; Gene Expression Regulation, Plant ; Genes, Plant ; *Light ; Morphogenesis ; Mutation ; Nuclear Proteins/metabolism ; Oxidation-Reduction ; Phenotype ; *Photoreceptor Cells, Invertebrate ; Plant Proteins/chemistry/genetics/*metabolism ; Plants, Genetically Modified ; Precipitin Tests ; Protein Binding ; Protein Structure, Tertiary ; Receptors, G-Protein-Coupled ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; *Ubiquitin-Protein Ligases
    Print ISSN: 0036-8075
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    Microbiology. Cracking Listeria's password (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finlay, B B -- New York, N.Y. -- Science. 2001 Jun 1;292(5522):1665-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biotechnology Laboratory, University of British Columbia, Vancouver, V6T 1Z3, British Columbia, Canada. bfinlay@interchange.ubc.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11387462" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Bacterial Proteins/chemistry/*metabolism ; Bacterial Translocation ; Cadherins/chemistry/genetics/*metabolism ; Carrier Proteins/genetics ; Cell Line ; *Disease Models, Animal ; Fatty Acid-Binding Proteins ; Guinea Pigs ; Humans ; Intestinal Mucosa/cytology/metabolism/*microbiology ; Intestine, Small/cytology/metabolism/microbiology ; Listeria monocytogenes/metabolism/*pathogenicity ; Listeriosis/*microbiology ; Mice ; Mice, Transgenic ; *Neoplasm Proteins ; *Nerve Tissue Proteins ; Promoter Regions, Genetic ; *Tumor Suppressor Proteins ; Virulence
    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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  • 90
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    Molecular analysis of commensal host-microbial relationships in the intestine (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-07
    Description: Human beings contain complex societies of indigenous microbes, yet little is known about how resident bacteria shape our physiology. We colonized germ-free mice with Bacteroides thetaiotaomicron, a prominent component of the normal mouse and human intestinal microflora. Global intestinal transcriptional responses to colonization were observed with DNA microarrays, and the cellular origins of selected responses were established by laser-capture microdissection. The results reveal that this commensal bacterium modulates expression of genes involved in several important intestinal functions, including nutrient absorption, mucosal barrier fortification, xenobiotic metabolism, angiogenesis, and postnatal intestinal maturation. These findings provide perspectives about the essential nature of the interactions between resident microorganisms and their hosts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hooper, L V -- Wong, M H -- Thelin, A -- Hansson, L -- Falk, P G -- Gordon, J I -- DK30292/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2001 Feb 2;291(5505):881-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology and Pharmacology, 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/11157169" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacteroides/genetics/growth & development/*physiology ; Bifidobacterium/growth & development/physiology ; Colony Count, Microbial ; Cornified Envelope Proline-Rich Proteins ; Escherichia coli/growth & development/physiology ; Gastrointestinal Motility/genetics ; Gene Expression Profiling ; *Gene Expression Regulation ; Germ-Free Life ; Humans ; Ileum/cytology/immunology/*metabolism/*microbiology ; Intestinal Absorption/genetics ; Intestinal Mucosa/cytology/immunology/*metabolism/*microbiology ; Male ; Matched-Pair Analysis ; Membrane Proteins/genetics/metabolism ; Mice ; Mice, Inbred Strains ; Mutation ; Neovascularization, Physiologic/genetics ; Oligonucleotide Array Sequence Analysis ; Protein Precursors/genetics/metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; Xenobiotics/metabolism
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    Saving lives with sugar (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alper, J -- New York, N.Y. -- Science. 2001 Mar 23;291(5512):2339.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11269309" target="_blank"〉PubMed〈/a〉
    Keywords: Carbohydrate Metabolism, Inborn Errors/*drug therapy/enzymology/genetics ; Child ; Clinical Trials as Topic ; Glycosylation ; Humans ; Male ; Mannose/metabolism/*therapeutic use ; Mannose-6-Phosphate Isomerase/deficiency/metabolism ; Mannosephosphates/metabolism
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  • 92
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    Phosphorylation-dependent ubiquitination of cyclin E by the SCFFbw7 ubiquitin ligase (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-09-05
    Description: Cyclin E binds and activates the cyclin-dependent kinase Cdk2 and catalyzes the transition from the G1 phase to the S phase of the cell cycle. The amount of cyclin E protein present in the cell is tightly controlled by ubiquitin-mediated proteolysis. Here we identify the ubiquitin ligase responsible for cyclin E ubiquitination as SCFFbw7 and demonstrate that it is functionally conserved in yeast, flies, and mammals. Fbw7 associates specifically with phosphorylated cyclin E, and SCFFbw7 catalyzes cyclin E ubiquitination in vitro. Depletion of Fbw7 leads to accumulation and stabilization of cyclin E in vivo in human and Drosophila melanogaster cells. Multiple F-box proteins contribute to cyclin E stability in yeast, suggesting an overlap in SCF E3 ligase specificity that allows combinatorial control of cyclin E degradation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koepp, D M -- Schaefer, L K -- Ye, X -- Keyomarsi, K -- Chu, C -- Harper, J W -- Elledge, S J -- R01 AG011085/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2001 Oct 5;294(5540):173-7. Epub 2001 Aug 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX, 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11533444" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Breast Neoplasms/genetics/metabolism ; *CDC2-CDC28 Kinases ; *Cell Cycle ; Cell Cycle Proteins/chemistry/genetics/*metabolism ; Cell Line ; Cyclin E/*metabolism ; Cyclin-Dependent Kinase 2 ; Cyclin-Dependent Kinases/metabolism ; Drosophila Proteins ; Drosophila melanogaster ; *F-Box Proteins ; Humans ; Mice ; Molecular Sequence Data ; Peptide Synthases/chemistry/genetics/*metabolism ; Phosphorylation ; Protein-Serine-Threonine Kinases/metabolism ; RNA, Double-Stranded ; Recombinant Fusion Proteins/metabolism ; SKP Cullin F-Box Protein Ligases ; Saccharomyces cerevisiae/genetics/metabolism ; Saccharomyces cerevisiae Proteins ; Sequence Alignment ; Transfection ; Tumor Cells, Cultured ; *Ubiquitin-Protein Ligases ; Ubiquitins/*metabolism
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    Protein design of an HIV-1 entry inhibitor (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-07
    Description: Human immunodeficiency virus type-1 (HIV-1) membrane fusion is promoted by the formation of a trimer-of-hairpins structure that brings the amino- and carboxyl-terminal regions of the gp41 envelope glycoprotein ectodomain into close proximity. Peptides derived from the carboxyl-terminal region (called C-peptides) potently inhibit HIV-1 entry by binding to the gp41 amino-terminal region. To test the converse of this inhibitory strategy, we designed a small protein, denoted 5-Helix, that binds the C-peptide region of gp41. The 5-Helix protein displays potent (nanomolar) inhibitory activity against diverse HIV-1 variants and may serve as the basis for a new class of antiviral agents. The inhibitory activity of 5-Helix also suggests a strategy for generating an HIV-1 neutralizing antibody response that targets the carboxyl-terminal region of the gp41 ectodomain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Root, M J -- Kay, M S -- Kim, P S -- P01 GM56552/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Feb 2;291(5505):884-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Whitehead Institute for Biomedical Research, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02142, USA. kimadmin@wi.mit.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11229405" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; *Anti-HIV Agents/chemistry/immunology/metabolism/pharmacology ; Carrier Proteins/*chemistry/metabolism/*pharmacology ; Cell Line ; *Drug Design ; Giant Cells/drug effects ; HIV Antibodies/immunology ; HIV Envelope Protein gp41/chemistry/*metabolism ; HIV-1/*drug effects/physiology ; Humans ; Membrane Fusion/*drug effects ; Molecular Sequence Data ; Neutralization Tests ; Peptide Fragments/chemistry/immunology/metabolism ; *Peptides ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Tumor Cells, Cultured
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    Population ecology. Not all sheep are equal (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-05-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gaillard, J M -- Festa-Bianchet, M -- Yoccoz, N G -- New York, N.Y. -- Science. 2001 May 25;292(5521):1499-500.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Unite Mixte de Recherche No. 5558 "Biometrie et Biologie Evolutive," University of Lyon, Villeurbanne Cedex, France. gaillard@biomserv.univ-lyon1.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11379631" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animals ; *Ecosystem ; Female ; Hebrides ; Male ; Population Density ; Population Dynamics ; Reproduction ; Sex Characteristics ; *Sheep/physiology ; Weather
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  • 95
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    Extension of life-span by loss of CHICO, a Drosophila insulin receptor substrate protein (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-09
    Description: The Drosophila melanogaster gene chico encodes an insulin receptor substrate that functions in an insulin/insulin-like growth factor (IGF) signaling pathway. In the nematode Caenorhabditis elegans, insulin/IGF signaling regulates adult longevity. We found that mutation of chico extends fruit fly median life-span by up to 48% in homozygotes and 36% in heterozygotes. Extension of life-span was not a result of impaired oogenesis in chico females, nor was it consistently correlated with increased stress resistance. The dwarf phenotype of chico homozygotes was also unnecessary for extension of life-span. The role of insulin/IGF signaling in regulating animal aging is therefore evolutionarily conserved.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clancy, D J -- Gems, D -- Harshman, L G -- Oldham, S -- Stocker, H -- Hafen, E -- Leevers, S J -- Partridge, L -- New York, N.Y. -- Science. 2001 Apr 6;292(5514):104-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University College London, Wolfson House, 4 Stephenson Way, London NW1 2HE, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11292874" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/*physiology ; Alleles ; Animals ; Body Constitution ; Carrier Proteins/genetics/metabolism ; Crosses, Genetic ; *Drosophila Proteins ; Drosophila melanogaster/genetics/*physiology ; Female ; Fertility ; Genes, Insect ; Heterozygote ; Hot Temperature ; Insect Proteins/*genetics/*metabolism ; Insulin/metabolism ; Insulin Receptor Substrate Proteins ; *Intracellular Signaling Peptides and Proteins ; Longevity/*physiology ; Male ; Mutation ; Oxidative Stress ; Protein-Tyrosine Kinases/genetics/metabolism ; *Receptor Protein-Tyrosine Kinases ; Receptor, Insulin/*metabolism ; Reproduction ; Signal Transduction ; Somatomedins/metabolism ; Starvation ; Superoxide Dismutase
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    In silico mapping of mouse quantitative trait loci (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chesler, E J -- Rodriguez-Zas, S L -- Mogil, J S -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2423.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology and, Neuroscience Program, University of Illinois at Urbana-Champaign, Champaign, IL 61820, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752534" target="_blank"〉PubMed〈/a〉
    Keywords: *Algorithms ; Animals ; Chromosome Mapping/*methods ; Genetic Linkage ; Genotype ; Mice ; Mice, Inbred Strains ; Phenotype ; Polymorphism, Single Nucleotide ; *Quantitative Trait, Heritable ; Statistics as Topic
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    Development. Staying a boy forever (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wasserman, S A -- DiNardo, S -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2495-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Molecular Genetics, Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA 92093-0634, USA. stevenw@ucsd.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11752564" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Aging ; Cell Division ; Cell Nucleus/metabolism ; Drosophila/cytology/embryology/physiology ; Drosophila Proteins/*metabolism ; Germ Cells/cytology/metabolism/*physiology ; Glycoproteins/*metabolism ; Ligands ; Male ; Phosphorylation ; Protein-Tyrosine Kinases/*metabolism ; Signal Transduction ; Spermatids/cytology/physiology ; Spermatogenesis ; Stem Cells/cytology/metabolism/*physiology ; Testis/cytology ; Transcription Factors/*metabolism
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    TRP-PLIK, a bifunctional protein with kinase and ion channel activities (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-02-13
    Description: We cloned and characterized a protein kinase and ion channel, TRP-PLIK. As part of the long transient receptor potential channel subfamily implicated in control of cell division, it is a protein that is both an ion channel and a protein kinase. TRP-PLIK phosphorylated itself, displayed a wide tissue distribution, and, when expressed in CHO-K1 cells, constituted a nonselective, calcium-permeant, 105-picosiemen, steeply outwardly rectifying conductance. The zinc finger containing alpha-kinase domain was functional. Inactivation of the kinase activity by site-directed mutagenesis and the channel's dependence on intracellular adenosine triphosphate (ATP) demonstrated that the channel's kinase activity is essential for channel function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Runnels, L W -- Yue, L -- Clapham, D E -- New York, N.Y. -- Science. 2001 Feb 9;291(5506):1043-7. Epub 2001 Jan 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Cardiology, Department of Neurobiology, Harvard Medical School, 1309 Enders Building, 320 Longwood Avenue, Children's Hospital, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11161216" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Amino Acid Motifs ; Amino Acid Sequence ; Animals ; CHO Cells ; Calcium/metabolism ; Catalytic Domain ; Cations/metabolism ; Cell Line ; Cricetinae ; DNA, Complementary ; Electric Conductivity ; Humans ; Ion Channels/chemistry/*genetics/*metabolism ; *Membrane Proteins ; Mice ; Molecular Sequence Data ; Mutation ; Myelin Basic Protein/metabolism ; Patch-Clamp Techniques ; Phosphorylation ; Protein Kinases/chemistry/*genetics/*metabolism ; Protein-Serine-Threonine Kinases ; Rats ; Recombinant Fusion Proteins/chemistry/metabolism ; TRPM Cation Channels ; Transfection ; Two-Hybrid System Techniques ; Type C Phospholipases/metabolism
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    Demography. Sardinia's mysterious male Methuselahs (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koenig, R -- New York, N.Y. -- Science. 2001 Mar 16;291(5511):2074-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11256398" target="_blank"〉PubMed〈/a〉
    Keywords: Consanguinity ; DNA, Mitochondrial/genetics ; Female ; Genetic Variation ; Genetics, Population ; Humans ; Immunity, Innate ; Italy ; Life Style ; *Longevity/genetics/immunology ; Male ; Polymorphism, Genetic ; Y Chromosome/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    Regulation of clock and NPAS2 DNA binding by the redox state of NAD cofactors (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-07-07
    Description: Clock:BMAL1 and NPAS2:BMAL1 are heterodimeric transcription factors that control gene expression as a function of the light-dark cycle. Although built to fluctuate at or near a 24-hour cycle, the clock can be entrained by light, activity, or food. Here we show that the DNA-binding activity of the Clock:BMAL1 and NPAS2:BMAL1 heterodimers is regulated by the redox state of nicotinamide adenine dinucleotide (NAD) cofactors in a purified system. The reduced forms of the redox cofactors, NAD(H) and NADP(H), strongly enhance DNA binding of the Clock:BMAL1 and NPAS2:BMAL1 heterodimers, whereas the oxidized forms inhibit. These observations raise the possibility that food, neuronal activity, or both may entrain the circadian clock by direct modulation of cellular redox state.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rutter, J -- Reick, M -- Wu, L C -- McKnight, S L -- 1RO1MH59388/MH/NIMH NIH HHS/ -- NIH5-T32-GM08-291-12/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Jul 20;293(5529):510-4. Epub 2001 Jul 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Texas-Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9152, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11441146" target="_blank"〉PubMed〈/a〉
    Keywords: ARNTL Transcription Factors ; Animals ; Aryl Hydrocarbon Receptor Nuclear Translocator ; Basic Helix-Loop-Helix Transcription Factors ; Biological Clocks ; CLOCK Proteins ; Cell Line ; Circadian Rhythm ; DNA/*metabolism ; *DNA-Binding Proteins ; Dimerization ; Helix-Loop-Helix Motifs ; Humans ; L-Lactate Dehydrogenase/genetics/metabolism ; Mice ; NAD/*metabolism/pharmacology ; NADP/*metabolism/pharmacology ; Nerve Tissue Proteins/chemistry/*metabolism ; Oxidation-Reduction ; *Receptors, Aryl Hydrocarbon ; Recombinant Proteins/metabolism ; Trans-Activators/chemistry/*metabolism ; Transcription Factors/chemistry/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
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