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  • 2005-2009
  • 2000-2004  (164)
  • 2000  (164)
  • 1
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    Linkage disequilibrium and recombination in hominid mitochondrial DNA (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-05
    Description: The assumption that human mitochondrial DNA is inherited from one parent only and therefore does not recombine is questionable. Linkage disequilibrium in human and chimpanzee mitochondrial DNA declines as a function of the distance between sites. This pattern can be attributed to one mechanism only: recombination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Awadalla, P -- Eyre-Walker, A -- Smith, J M -- New York, N.Y. -- Science. 1999 Dec 24;286(5449):2524-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Cell, Animal and Population Biology, University of Edinburgh, Edinburgh EH9 1JT, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10617471" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA, Mitochondrial/*genetics ; Evolution, Molecular ; Fathers ; Female ; Hominidae/*genetics ; Humans ; *Linkage Disequilibrium ; Male ; NADH Dehydrogenase/genetics ; Pan troglodytes/*genetics ; Polymorphism, Restriction Fragment Length ; *Recombination, Genetic
    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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    Effects of environment on compensatory mutations to ameliorate costs of antibiotic resistance (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-02-26
    Description: Most types of antibiotic resistance impose a biological cost on bacterial fitness. These costs can be compensated, usually without loss of resistance, by second-site mutations during the evolution of the resistant bacteria in an experimental host or in a laboratory medium. Different fitness-compensating mutations were selected depending on whether the bacteria evolved through serial passage in mice or in a laboratory medium. This difference in mutation spectra was caused by either a growth condition-specific formation or selection of the compensated mutants. These results suggest that bacterial evolution to reduce the costs of antibiotic resistance can take different trajectories within and outside a host.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bjorkman, J -- Nagaev, I -- Berg, O G -- Hughes, D -- Andersson, D I -- New York, N.Y. -- Science. 2000 Feb 25;287(5457):1479-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Bacteriology, Swedish Institute for Infectious Disease Control, S-171 82 Solna, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10688795" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Animals ; Anti-Bacterial Agents/*pharmacology ; *Antiporters ; Carrier Proteins/genetics ; Culture Media ; Drug Resistance, Microbial/*genetics ; Escherichia coli Proteins ; Evolution, Molecular ; Female ; Fusidic Acid/pharmacology ; Membrane Proteins/genetics ; Mice ; Mice, Inbred BALB C ; *Mutation ; Peptide Elongation Factor G/genetics ; Ribosomal Proteins/genetics ; Salmonella typhimurium/*drug effects/*genetics/growth & development/metabolism ; Selection, Genetic ; Serial Passage ; Streptomycin/pharmacology ; Suppression, Genetic
    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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    Prostaglandin D2 as a mediator of allergic asthma (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-17
    Description: Allergic asthma is caused by the aberrant expansion in the lung of T helper cells that produce type 2 (TH2) cytokines and is characterized by infiltration of eosinophils and bronchial hyperreactivity. This disease is often triggered by mast cells activated by immunoglobulin E (IgE)-mediated allergic challenge. Activated mast cells release various chemical mediators, including prostaglandin D2 (PGD2), whose role in allergic asthma has now been investigated by the generation of mice deficient in the PGD receptor (DP). Sensitization and aerosol challenge of the homozygous mutant (DP-/-) mice with ovalbumin (OVA) induced increases in the serum concentration of IgE similar to those in wild-type mice subjected to this model of asthma. However, the concentrations of TH2 cytokines and the extent of lymphocyte accumulation in the lung of OVA-challenged DP-/- mice were greatly reduced compared with those in wild-type animals. Moreover, DP-/- mice showed only marginal infiltration of eosinophils and failed to develop airway hyperreactivity. Thus, PGD2 functions as a mast cell-derived mediator to trigger asthmatic responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matsuoka, T -- Hirata, M -- Tanaka, H -- Takahashi, Y -- Murata, T -- Kabashima, K -- Sugimoto, Y -- Kobayashi, T -- Ushikubi, F -- Aze, Y -- Eguchi, N -- Urade, Y -- Yoshida, N -- Kimura, K -- Mizoguchi, A -- Honda, Y -- Nagai, H -- Narumiya, S -- New York, N.Y. -- Science. 2000 Mar 17;287(5460):2013-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Kyoto University Faculty of Medicine, Kyoto 606-8501, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10720327" target="_blank"〉PubMed〈/a〉
    Keywords: Allergens/immunology ; Animals ; Asthma/immunology/metabolism/pathology/*physiopathology ; Bronchial Hyperreactivity ; Bronchoalveolar Lavage Fluid/cytology/immunology ; Crosses, Genetic ; Female ; Gene Targeting ; Humans ; Immunoglobulin E/blood ; Interferon-gamma/metabolism ; Interleukins/metabolism ; Lung/immunology/metabolism/pathology ; Lymphocytes/immunology ; Male ; Mast Cells/metabolism ; Mice ; Mice, Inbred C57BL ; Mucus/secretion ; Ovalbumin/immunology ; Prostaglandin D2/metabolism/*physiology ; *Receptors, Immunologic ; Receptors, Prostaglandin/genetics/metabolism/*physiology ; Respiratory Mucosa/secretion
    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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    Dialog on depression (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-06-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Persaud, R -- New York, N.Y. -- Science. 2000 May 12;288(5468):975.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10841715" target="_blank"〉PubMed〈/a〉
    Keywords: Canada/epidemiology ; Depression/*epidemiology/etiology ; Depressive Disorder/*epidemiology/etiology ; Female ; Humans ; Male
    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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    Bicoid-independent formation of thoracic segments in Drosophila (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-31
    Description: The maternal determinant Bicoid (Bcd) represents the paradigm of a morphogen that provides positional information for pattern formation. However, as bicoid seems to be a recently acquired gene in flies, the question was raised as to how embryonic patterning is achieved in organisms with more ancestral modes of development. Because the phylogenetically conserved Hunchback (Hb) protein had previously been shown to act as a morphogen in abdominal patterning, we asked which functions of Bcd could be performed by Hb. By reestablishing a proposed ancient regulatory circuitry in which maternal Hb controls zygotic hunchback expression, we show that Hb is able to form thoracic segments in the absence of Bcd.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wimmer, E A -- Carleton, A -- Harjes, P -- Turner, T -- Desplan, C -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2476-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lehrstuhl Genetik, Universitat Bayreuth, 95447 Bayreuth, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10741965" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Body Patterning ; DNA-Binding Proteins/genetics/*physiology ; Drosophila/*embryology/genetics ; *Drosophila Proteins ; Embryonic Development ; Female ; Gene Expression Regulation, Developmental ; Genes, Insect ; Homeodomain Proteins/genetics/*physiology ; Insect Proteins/genetics/*physiology ; Male ; Mutation ; Phenotype ; Promoter Regions, Genetic ; Thorax/embryology ; Trans-Activators/genetics/*physiology ; Transcription Factors/genetics/*physiology ; Transgenes ; Zinc Fingers ; Zygote/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 6
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    Ecology. Food fight drives evolution (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-12
    Description: On page 441 of this issue, evolutionary biologists showcase the purple-throated carib hummingbird as a rare example of food supply--in this case, flower shape--spurring the evolution of a sexual dimorphism, or a feature that differs between males and females. On St. Lucia, an island in the West Indies, female caribs sport bills a third longer and twice as curved as those of their male counterparts--one of the most extreme bill differences between the sexes in any hummingbird species. In the paper, the researchers link these "whoppingly dimorphic bills" to the specific flowers the male and female caribs frequent.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brown, K -- New York, N.Y. -- Science. 2000 Jul 21;289(5478):369-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10939937" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Beak/*anatomy & histology ; *Biological Evolution ; Birds/*anatomy & histology/physiology ; Ecosystem ; Feeding Behavior ; Female ; Male ; Plant Structures/anatomy & histology ; Saint Lucia ; *Sex Characteristics ; Zingiberales/*anatomy & histology
    Print ISSN: 0036-8075
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  • 7
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    Has America's tide of violence receded for good? (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-12
    Description: Experts in the young field of violence epidemiology blame guns and crack cocaine for America's deadly crime surge in the early 1990s. Explaining the subsequent decline in violent crime rates has been more difficult, however. Some of the factors that seem to have helped squelch crime could be temporary, such as low unemployment rates. But others, including a growing intolerance for violence as a means of settling interpersonal disputes, seem to have become cultural norms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Helmuth, L -- New York, N.Y. -- Science. 2000 Jul 28;289(5479):582-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10939973" target="_blank"〉PubMed〈/a〉
    Keywords: Abortion, Legal ; Crack Cocaine ; Domestic Violence/statistics & numerical data ; Female ; Firearms ; Homicide/*statistics & numerical data ; Humans ; Male ; Police ; Prisons ; Street Drugs ; United States ; Violence/*statistics & numerical data
    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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  • 8
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    Epitopes involved in antibody-mediated protection from Ebola virus (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-04
    Description: To determine the ability of antibodies to provide protection from Ebola viruses, monoclonal antibodies (mAbs) to the Ebola glycoprotein were generated and evaluated for efficacy. We identified several protective mAbs directed toward five unique epitopes on Ebola glycoprotein. One of the epitopes is conserved among all Ebola viruses that are known to be pathogenic for humans. Some protective mAbs were also effective therapeutically when administered to mice 2 days after exposure to lethal Ebola virus. The identification of protective mAbs has important implications for developing vaccines and therapies for Ebola virus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, J A -- Hevey, M -- Bakken, R -- Guest, S -- Bray, M -- Schmaljohn, A L -- Hart, M K -- New York, N.Y. -- Science. 2000 Mar 3;287(5458):1664-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Virology Division, U.S. Army Medical Research Institute of Infectious Diseases, 1425 Porter Street, Fort Detrick, Frederick, MD 21702-5011, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10698744" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/*immunology ; Antibodies, Viral/*immunology ; Antibody Affinity ; Antigens, Viral/immunology ; Binding, Competitive ; Complement System Proteins/immunology ; Ebolavirus/*immunology/physiology ; Epitopes/immunology ; Female ; Hemorrhagic Fever, Ebola/*prevention & control/therapy ; Humans ; Immunoglobulin G/immunology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Neutralization Tests ; Specific Pathogen-Free Organisms ; Viral Envelope Proteins/*immunology ; Viral Plaque Assay
    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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  • 9
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    5TH International Ancient DNA Conference. Divining diet and disease from DNA (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-12
    Description: Some 110 scientists from a range of disciplines gathered in the overcast British midlands for the 5th International Ancient DNA Conference, held here from 12 to 14 July. Among the attractions were new insights into the diets of early Americans gleaned from ancient human coprolites and intriguing reports of nuclear DNA and ancient viral sequences extracted from mammoth bones.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stokstad, E -- New York, N.Y. -- Science. 2000 Jul 28;289(5479):530-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10939960" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone and Bones/virology ; DNA/*analysis/history ; DNA, Viral/analysis/*history ; Diet/*history ; Elephants/*genetics/virology ; Feces/*chemistry ; Female ; Fossils ; History, Ancient ; Humans ; Male ; Texas
    Print ISSN: 0036-8075
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  • 10
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    Increase of maximum life-span in Sweden, 1861-1999 (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-09-29
    Description: A fundamental question in aging research is whether humans and other species possess an immutable life-span limit. We examined the maximum age at death in Sweden, which rose from about 101 years during the 1860s to about 108 years during the 1990s. The pace of increase was 0.44 years per decade before 1969 but accelerated to 1. 11 years per decade after that date. More than 70 percent of the rise in the maximum age at death from 1861 to 1999 is attributable to reductions in death rates above age 70. The rest are due to increased numbers of survivors to old age (both larger birth cohorts and increased survivorship from infancy to age 70). The more rapid rise in the maximum age since 1969 is due to the faster pace of old-age mortality decline during recent decades.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilmoth, J R -- Deegan, L J -- Lundstrom, H -- Horiuchi, S -- K02-AG00778/AG/NIA NIH HHS/ -- R01-AG11552/AG/NIA NIH HHS/ -- R01-AG14698/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2000 Sep 29;289(5488):2366-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Demography, University of California, Berkeley, CA 94720-2120, USA. jrw@demog.berkeley.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11009426" target="_blank"〉PubMed〈/a〉
    Keywords: Aged ; Aged, 80 and over ; Cohort Studies ; Female ; Humans ; Life Expectancy/trends ; Life Tables ; *Longevity ; Male ; Mortality/trends ; Probability ; Sweden
    Print ISSN: 0036-8075
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  • 11
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    Reversal of antipsychotic-induced working memory deficits by short-term dopamine D1 receptor stimulation (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-17
    Description: Chronic blockade of dopamine D2 receptors, a common mechanism of action for antipsychotic drugs, down-regulates D1 receptors in the prefrontal cortex and, as shown here, produces severe impairments in working memory. These deficits were reversed in monkeys by short-term coadministration of a D1 agonist, ABT 431, and this improvement was sustained for more than a year after cessation of D1 treatment. These findings indicate that pharmacological modulation of the D1 signaling pathway can produce long-lasting changes in functional circuits underlying working memory. Resetting this pathway by brief exposure to the agonist may provide a valuable strategy for therapeutic intervention in schizophrenia and other dopamine dysfunctional states.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Castner, S A -- Williams, G V -- Goldman-Rakic, P S -- P01DA10160/DA/NIDA NIH HHS/ -- P50MH44866/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2000 Mar 17;287(5460):2020-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Neurobiology, Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10720329" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antipsychotic Agents/*pharmacology ; Cyclic AMP/metabolism ; Dopamine/metabolism ; Dopamine Agonists/*pharmacology ; Dopamine Antagonists/pharmacology ; Down-Regulation ; Female ; Haloperidol/*pharmacology ; Haplorhini ; Memory/*drug effects ; Prefrontal Cortex/drug effects/metabolism ; Psychomotor Performance/drug effects ; Pyridines/*pharmacology ; Receptors, Dopamine D1/agonists/*metabolism ; Signal Transduction ; Tetrahydronaphthalenes/*pharmacology ; Time Factors
    Print ISSN: 0036-8075
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  • 12
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    Neuroimaging evidence for dissociable forms of repetition priming (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-02-26
    Description: Repetition priming has been characterized neurophysiologically as a decreased response following stimulus repetition. The present study used event-related functional magnetic resonance imaging to investigate whether this repetition-related response is sensitive to stimulus familiarity. A right fusiform region exhibited an attenuated response to the repetition of familiar stimuli, both faces and symbols, but exhibited an enhanced response to the repetition of unfamiliar stimuli. Moreover, both repetition effects were modulated by lag between successive presentations. Further experiments replicated the interactions between repetition, familiarity, and lag and demonstrated the persistence of these effects over multiple repetitions. Priming-related responses are therefore not unitary but depend on the presence or absence of preexisting stimulus representations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Henson, R -- Shallice, T -- Dolan, R -- New York, N.Y. -- Science. 2000 Feb 18;287(5456):1269-72.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Wellcome Department of Cognitive Neurology, Institute of Neurology, Institute of Cognitive Neuroscience and Department of Psychology, University College London, London WC1E 6BT, UK. r.henson@ucl.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10678834" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Brain Mapping ; Face ; Female ; Humans ; Magnetic Resonance Imaging ; Male ; Memory/*physiology ; *Pattern Recognition, Visual ; Regression Analysis ; Temporal Lobe/*physiology ; Time Factors
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  • 13
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    Regulation of cell fate decision of undifferentiated spermatogonia by GDNF (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-02-26
    Description: The molecular control of self-renewal and differentiation of stem cells has remained enigmatic. Transgenic loss-of-function and overexpression models now show that the dosage of glial cell line-derived neurotrophic factor (GDNF), produced by Sertoli cells, regulates cell fate decisions of undifferentiated spermatogonial cells that include the stem cells for spermatogenesis. Gene-targeted mice with one GDNF-null allele show depletion of stem cell reserves, whereas mice overexpressing GDNF show accumulation of undifferentiated spermatogonia. They are unable to respond properly to differentiation signals and undergo apoptosis upon retinoic acid treatment. Nonmetastatic testicular tumors are regularly formed in older GDNF-overexpressing mice. Thus, GDNF contributes to paracrine regulation of spermatogonial self-renewal and differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meng, X -- Lindahl, M -- Hyvonen, M E -- Parvinen, M -- de Rooij, D G -- Hess, M W -- Raatikainen-Ahokas, A -- Sainio, K -- Rauvala, H -- Lakso, M -- Pichel, J G -- Westphal, H -- Saarma, M -- Sariola, H -- New York, N.Y. -- Science. 2000 Feb 25;287(5457):1489-93.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Research Programs of Developmental Biology, Molecular Neurobiology, Electron Microscopy Unit, Institute of Biotechnology, Viikki Biocenter, Finland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10688798" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis/drug effects ; Cell Cycle ; Cell Differentiation/drug effects ; Cobalt/metabolism ; *Drosophila Proteins ; Female ; Gene Expression ; Gene Targeting ; Glial Cell Line-Derived Neurotrophic Factor ; Glial Cell Line-Derived Neurotrophic Factor Receptors ; Male ; Mice ; Mice, Transgenic ; Mitosis ; *Nerve Growth Factors ; Nerve Tissue Proteins/genetics/*physiology ; Proto-Oncogene Proteins/genetics/metabolism ; Proto-Oncogene Proteins c-ret ; Receptor Protein-Tyrosine Kinases/genetics/metabolism ; Sertoli Cells/cytology/physiology ; *Spermatogenesis ; Spermatogonia/*cytology/drug effects ; Stem Cells/*cytology ; Testicular Neoplasms/pathology ; Testis/anatomy & histology ; Vitamin A/pharmacology
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  • 14
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    Paleoforensics. Ice Man warms up for European scientists (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-10-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stone, R -- New York, N.Y. -- Science. 2000 Sep 29;289(5488):2253-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11041782" target="_blank"〉PubMed〈/a〉
    Keywords: DNA, Mitochondrial/genetics ; Europe ; History, Ancient ; Humans ; Ice ; Italy ; Male ; *Mummies ; Paleodontology ; Paleopathology
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  • 15
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    Learning-induced LTP in neocortex (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-10-20
    Description: The hypothesis that learning occurs through long-term potentiation (LTP)- and long-term depression (LTD)-like mechanisms is widely held but unproven. This hypothesis makes three assumptions: Synapses are modifiable, they modify with learning, and they strengthen through an LTP-like mechanism. We previously established the ability for synaptic modification and a synaptic strengthening with motor skill learning in horizontal connections of the rat motor cortex (MI). Here we investigated whether learning strengthened these connections through LTP. We demonstrated that synapses in the trained MI were near the ceiling of their modification range, compared with the untrained MI, but the range of synaptic modification was not affected by learning. In the trained MI, LTP was markedly reduced and LTD was enhanced. These results are consistent with the use of LTP to strengthen synapses during learning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rioult-Pedotti, M S -- Friedman, D -- Donoghue, J P -- NS27164/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2000 Oct 20;290(5491):533-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Brown University, Providence, RI 02912, USA. mengia_rioult@brown.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11039938" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Electric Stimulation ; Female ; Learning/*physiology ; Long-Term Potentiation/*physiology ; Models, Neurological ; Motor Cortex/*physiology ; Motor Skills ; Neuronal Plasticity ; Rats ; Rats, Sprague-Dawley ; Synapses/*physiology ; Synaptic Transmission
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    A niche maintaining germ line stem cells in the Drosophila ovary (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-10-13
    Description: Stromal cells are thought to generate specific regulatory microenviroments or "niches" that control stem cell behavior. Characterizing stem cell niches in vivo remains an important goal that has been difficult to achieve. The individual ovarioles of the Drosophila ovary each contain about two germ line stem cells that maintain oocyte production. Here we show that anterior ovariolar somatic cells comprising three cell types act as a germ line stem cell niche. Germ line stem cells lost by normal or induced differentiation are efficiently replaced, and the ability to repopulate the niche increases the functional lifetime of ovarioles in vivo. Our studies implicate one of the somatic cell types, the cap cells, as a key niche component.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xie, T -- Spradling, A C -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2000 Oct 13;290(5490):328-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Embryology, Howard Hughes Medical Institute, Carnegie Institution of Washington, 115 West University Parkway, Baltimore, MD 21210, USA. tgx@stowers-institute.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11030649" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Genetically Modified ; Cell Communication ; Cell Differentiation ; Drosophila/*cytology/physiology ; Female ; Germ Cells/*cytology/physiology ; Intercellular Junctions/physiology ; Models, Biological ; Mutation ; Oocytes/*cytology/physiology ; Ovary/cytology ; Stem Cells/*cytology/physiology ; Stromal Cells/cytology/physiology ; Transgenes
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Recovery and management options for spring/summer chinook salmon in the Columbia River basin (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-11-04
    Description: Construction of four dams on the lower Snake River (in northwestern United States) between 1961 and 1975 altered salmon spawning habitat, elevated smolt and adult migration mortality, and contributed to severe declines of Snake River salmon populations. By applying a matrix model to long-term population data, we found that (i) dam passage improvements have dramatically mitigated direct mortality associated with dams; (ii) even if main stem survival were elevated to 100%, Snake River spring/summer chinook salmon (Oncorhynchus tshawytscha) would probably continue to decline toward extinction; and (iii) modest reductions in first-year mortality or estuarine mortality would reverse current population declines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kareiva, P -- Marvier, M -- McClure, M -- New York, N.Y. -- Science. 2000 Nov 3;290(5493):977-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Marine Fisheries Service, Northwest Fisheries Science Center, 2725 Montlake Boulevard East, Seattle, WA 98112, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11062128" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Conservation of Natural Resources ; *Ecosystem ; Female ; Fresh Water ; Male ; Models, Biological ; Models, Statistical ; Northwestern United States ; Population Dynamics ; *Salmon/growth & development/physiology ; Survival Rate
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    Insect population control using a dominant, repressible, lethal genetic system (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-31
    Description: A major modification to the sterile insect technique is described, in which transgenic insects homozygous for a dominant, repressible, female-specific lethal gene system are used. We demonstrate two methods that give the required genetic characteristics in an otherwise wild-type genetic background. The first system uses a sex-specific promoter or enhancer to drive the expression of a repressible transcription factor, which in turn controls the expression of a toxic gene product. The second system uses non-sex-specific expression of the repressible transcription factor to regulate a selectively lethal gene product. Both methods work efficiently in Drosophila melanogaster, and we expect these principles to be widely applicable to more economically important organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thomas, D D -- Donnelly, C A -- Wood, R J -- Alphey, L S -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2474-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, Wellcome Trust Centre for the Epidemiology of Infectious Disease, Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10741964" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Genetically Modified ; Crosses, Genetic ; DNA-Binding Proteins ; *Drosophila Proteins ; Drosophila melanogaster/*genetics ; Egg Proteins/genetics ; Enhancer Elements, Genetic ; Fat Body/metabolism ; Female ; Gene Expression Regulation ; *Genes, Dominant ; *Genes, Insect ; *Genes, Lethal ; Genes, ras ; Homozygote ; Male ; Models, Biological ; Nuclear Proteins/genetics ; *Pest Control, Biological ; Promoter Regions, Genetic ; Tetracycline/pharmacology ; Trans-Activators/genetics ; Transcription Factors/genetics
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    South Africa's new enemy (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-15
    Description: Many South Africans long dreamed of the day when the oppressive apartheid system would end. That day has come, but now the country faces a new disaster: one of the world's worst HIV epidemics--and most confusing government responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 2000 Jun 23;288(5474):2168-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10896606" target="_blank"〉PubMed〈/a〉
    Keywords: *Acquired Immunodeficiency Syndrome/epidemiology ; Anti-HIV Agents/therapeutic use ; Disease Outbreaks ; Female ; Government ; HIV Infections/drug therapy/epidemiology ; Humans ; Male ; Pregnancy ; Pregnancy Complications, Infectious/drug therapy ; Public Policy ; *Research ; South Africa/epidemiology
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    Evolution. Parasites make scaredy-rats foolhardy (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zimmer, C -- New York, N.Y. -- Science. 2000 Jul 28;289(5479):525-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10939959" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Behavior, Animal ; Biological Evolution ; *Fear ; Female ; Humans ; Male ; *Personality ; Rats ; Toxoplasma/*physiology ; Toxoplasmosis, Animal/parasitology/*psychology ; Toxoplasmosis, Cerebral/parasitology/*psychology
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  • 21
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    Dissociating the role of the dorsolateral prefrontal and anterior cingulate cortex in cognitive control (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-06-10
    Description: Theories of the regulation of cognition suggest a system with two necessary components: one to implement control and another to monitor performance and signal when adjustments in control are needed. Event-related functional magnetic resonance imaging and a task-switching version of the Stroop task were used to examine whether these components of cognitive control have distinct neural bases in the human brain. A double dissociation was found. During task preparation, the left dorsolateral prefrontal cortex (Brodmann's area 9) was more active for color naming than for word reading, consistent with a role in the implementation of control. In contrast, the anterior cingulate cortex (Brodmann's areas 24 and 32) was more active when responding to incongruent stimuli, consistent with a role in performance monitoring.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉MacDonald, A W 3rd -- Cohen, J D -- Stenger, V A -- Carter, C S -- New York, N.Y. -- Science. 2000 Jun 9;288(5472):1835-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, University of Pittsburgh, Pittsburgh, PA 15260, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10846167" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Brain Mapping ; Cerebral Cortex/*physiology ; Cognition/*physiology ; Color ; Female ; Humans ; Magnetic Resonance Imaging ; Male ; Prefrontal Cortex/*physiology ; Reading
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    Epidemiology. Tracking the human fallout from 'mad cow disease' (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-09-19
    Description: A task force here has been studying cases of variant Creutzfeldt-Jakob disease (vCJD), an incurable malady of the brain and nervous system that has been linked to eating beef or other products from cattle infected with bovine spongiform encephalopathy or "mad cow disease." The team's goal is to find out just how the patients got infected and how many of them there may ultimately be. The number of confirmed or probable vCJD cases in the United Kingdom is still relatively small--a total of 80 as Science went to press--and recent estimates of the number of potential cases are lower than was once feared. Yet the task force's own recent results show that the incidence of vCJD is rising, and researchers remain determined to try to solve the riddles posed by vCJD.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balter, M -- New York, N.Y. -- Science. 2000 Sep 1;289(5484):1452-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10991726" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bias (Epidemiology) ; Cattle ; Cluster Analysis ; Creutzfeldt-Jakob Syndrome/*epidemiology/transmission ; Disease Outbreaks ; Encephalopathy, Bovine Spongiform/epidemiology/transmission ; Female ; *Food ; Great Britain/epidemiology ; Humans ; Incidence ; Male ; Meat ; Surveys and Questionnaires
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    Molecular biology. Mothers setting boundaries (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-15
    Description: Certain genes are only expressed at one allele, a phenomenon called imprinting. Although it is well established that one allele of certain imprinted genes is silenced through methylation, this does not appear to be the case for all imprinted genes. In a thoughtful Perspective, Thorvaldsen and Bartolomei discuss new findings showing that insertion of insulator elements (boundary regions) between the promoter of a gene and its enhancer (a sequence that boosts gene expression) may be another way in which genes are silenced during imprinting.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thorvaldsen, J L -- Bartolomei, M S -- New York, N.Y. -- Science. 2000 Jun 23;288(5474):2145-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA. thorvald@mail.med.upenn.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10896590" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; *DNA Methylation ; DNA-Binding Proteins/metabolism ; Dinucleoside Phosphates ; Enhancer Elements, Genetic ; Fathers ; Female ; *Gene Silencing ; *Genomic Imprinting ; Humans ; Insulin-Like Growth Factor II/genetics ; Male ; Models, Genetic ; Mothers ; Muscle Proteins/genetics ; Ovum/metabolism ; Promoter Regions, Genetic ; RNA, Long Noncoding ; *RNA, Untranslated ; Regulatory Sequences, Nucleic Acid ; *Repressor Proteins ; Spermatozoa/metabolism ; Transcription Factors/metabolism ; Zinc Fingers
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  • 24
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    Genetic suppression of polyglutamine toxicity in Drosophila (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-10
    Description: A Drosophila model for Huntington's and other polyglutamine diseases was used to screen for genetic factors modifying the degeneration caused by expression of polyglutamine in the eye. Among 7000 P-element insertions, several suppressor strains were isolated, two of which led to the discovery of the suppressor genes described here. The predicted product of one, dHDJ1, is homologous to human heat shock protein 40/HDJ1. That of the second, dTPR2, is homologous to the human tetratricopeptide repeat protein 2. Each of these molecules contains a chaperone-related J domain. Their suppression of polyglutamine toxicity was verified in transgenic flies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kazemi-Esfarjani, P -- Benzer, S -- New York, N.Y. -- Science. 2000 Mar 10;287(5459):1837-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology, California Institute of Technology, Pasadena, CA 91125, USA. parsa@its.caltech.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10710314" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Animals, Genetically Modified ; Cloning, Molecular ; Crosses, Genetic ; DNA Transposable Elements ; Disease Models, Animal ; *Drosophila Proteins ; Drosophila melanogaster/anatomy & histology/embryology/*genetics/metabolism ; Expressed Sequence Tags ; Eye/metabolism ; Eye Abnormalities ; Female ; Genes, Insect ; *Genes, Suppressor ; HSP40 Heat-Shock Proteins ; Heat-Shock Proteins/chemistry/*genetics/physiology ; Male ; Molecular Sequence Data ; *Nerve Degeneration ; Neurodegenerative Diseases ; Peptides/genetics/*metabolism ; Phenotype ; Proteins/chemistry ; Repetitive Sequences, Nucleic Acid ; Retina/metabolism ; Suppression, Genetic
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    Mate selection and the evolution of highly polymorphic self/nonself recognition genes (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-09-23
    Description: Multicellular organisms use the products of highly polymorphic genes to distinguish self from conspecific nonself cells or tissues. These allorecognition polymorphisms may regulate somatic interactions between hosts and pathogens or between competitors (to avoid various forms of parasitism), as well as reproductive interactions between mates or between gametes (to avoid inbreeding). In both cases, rare alleles may be advantageous, but it remains unclear which mechanism maintains the genetic polymorphism for specificity in self/nonself recognition. Contrary to earlier reports, we show that mate selection cannot be a strong force maintaining allorecognition polymorphism in two colonial marine invertebrates. Instead, the regulation of intraspecific competitive interactions appears to promote the evolution of polymorphisms in these species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grosberg, R K -- Hart, M W -- New York, N.Y. -- Science. 2000 Sep 22;289(5487):2111-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Evolution and Ecology and Center for Population Biology, One Shields Drive, University of California, Davis, CA 95616, USA. rkgrosberg@ucdavis.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11000110" target="_blank"〉PubMed〈/a〉
    Keywords: *Alleles ; Animals ; Biological Evolution ; Cnidaria/*genetics/physiology ; Crosses, Genetic ; Female ; Genes ; Genotype ; Major Histocompatibility Complex ; Male ; *Polymorphism, Genetic ; *Sexual Behavior, Animal ; Urochordata/*genetics/physiology
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    Paleoanthropology. A glimpse of humans' first journey out of Africa (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-06-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balter, M -- Gibbons, A -- New York, N.Y. -- Science. 2000 May 12;288(5468):948-50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10841709" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Animals ; Asia ; Emigration and Immigration ; Europe ; Female ; *Fossils ; Geologic Sediments ; Georgia (Republic) ; History, Ancient ; *Hominidae/anatomy & histology/classification ; Humans ; Male ; Paleodontology ; Skull/*anatomy & histology
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    Academic employment. UCSF researchers leave, charging bias (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-04-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 2000 Apr 7;288(5463):26-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10766628" target="_blank"〉PubMed〈/a〉
    Keywords: *Employment ; *Faculty ; Female ; Humans ; Mathematics ; Models, Biological ; *Prejudice ; Research ; *Universities
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  • 28
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    Promiscuity and the primate immune system (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-11-10
    Description: The behavioral and ecological factors involved in immune system evolution remain poorly explored. We present a phylogenetic analysis of white blood cell counts in primates to test three hypotheses related to disease risk: increases in risk are expected with group size or population density, exposure to soil-borne pathogens, and mating promiscuity. White blood cell counts were significantly greater in species where females have more mating partners, indicating that the risk of sexually transmitted disease is likely to be a major factor leading to systematic differences in the primate immune system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nunn, C L -- Gittleman, J L -- Antonovics, J -- GM60766-01/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Nov 10;290(5494):1168-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Gilmer Hall, University of Virginia, Charlottesville, VA 22904-4328, USA. charlie.nunn@virginia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11073457" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Zoo ; Biological Evolution ; Body Weight ; Female ; Haplorhini/blood/*immunology ; Immune System/*physiology ; *Leukocyte Count ; Male ; Population Density ; Primate Diseases/epidemiology/immunology ; Risk Factors ; *Sexual Behavior, Animal ; Sexually Transmitted Diseases/epidemiology/immunology/veterinary ; Species Specificity
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  • 29
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    Neurobiology. A new clue to how alcohol damages brains (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-02-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barinaga, M -- New York, N.Y. -- Science. 2000 Feb 11;287(5455):947-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10691562" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Benzodiazepines/adverse effects/toxicity ; Brain/cytology/*drug effects/growth & development ; Ethanol/blood/*toxicity ; Female ; Humans ; Infant, Newborn ; Nerve Degeneration ; Neurons/cytology/*drug effects ; Pregnancy ; Rats ; Receptors, GABA/*drug effects/metabolism ; Receptors, N-Methyl-D-Aspartate/antagonists & inhibitors/*drug effects/metabolism
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  • 30
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    Allosteric effects of Pit-1 DNA sites on long-term repression in cell type specification (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-11-10
    Description: Reciprocal gene activation and restriction during cell type differentiation from a common lineage is a hallmark of mammalian organogenesis. A key question, then, is whether a critical transcriptional activator of cell type-specific gene targets can also restrict expression of the same genes in other cell types. Here, we show that whereas the pituitary-specific POU domain factor Pit-1 activates growth hormone gene expression in one cell type, the somatotrope, it restricts its expression from a second cell type, the lactotrope. This distinction depends on a two-base pair spacing in accommodation of the bipartite POU domains on a conserved growth hormone promoter site. The allosteric effect on Pit-1, in combination with other DNA binding factors, results in the recruitment of a corepressor complex, including nuclear receptor corepressor N-CoR, which, unexpectedly, is required for active long-term repression of the growth hormone gene in lactotropes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Scully, K M -- Jacobson, E M -- Jepsen, K -- Lunyak, V -- Viadiu, H -- Carriere, C -- Rose, D W -- Hooshmand, F -- Aggarwal, A K -- Rosenfeld, M G -- R01 DK18477/DK/NIDDK NIH HHS/ -- R01 DK54802/DK/NIDDK NIH HHS/ -- R01 GM49327/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Nov 10;290(5494):1127-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Endocrinology and Metabolism, School of Medicine, University of California, San Diego, La Jolla, CA 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11073444" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Animals ; Base Sequence ; Binding Sites ; Cell Line ; Conserved Sequence ; Crystallization ; DNA/*metabolism ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; Female ; *Gene Expression Regulation ; Genes, Reporter ; Growth Hormone/*genetics ; Male ; Mice ; Mice, Transgenic ; Models, Molecular ; Molecular Sequence Data ; Nuclear Proteins/genetics/metabolism ; Nuclear Receptor Co-Repressor 1 ; Pituitary Gland/cytology/*metabolism ; Prolactin/*genetics ; Promoter Regions, Genetic ; Protein Conformation ; Protein Structure, Tertiary ; Rats ; Repressor Proteins/chemistry/genetics/*metabolism ; Transcription Factor Pit-1 ; Transcription Factors/chemistry/genetics/*metabolism ; Transcriptional Activation
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    Song replay during sleep and computational rules for sensorimotor vocal learning (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-10-29
    Description: Songbirds learn a correspondence between vocal-motor output and auditory feedback during development. For neurons in a motor cortex analog of adult zebra finches, we show that the timing and structure of activity elicited by the playback of song during sleep matches activity during daytime singing. The motor activity leads syllables, and the matching sensory response depends on a sequence of typically up to three of the preceding syllables. Thus, sensorimotor correspondence is reflected in temporally precise activity patterns of single neurons that use long sensory memories to predict syllable sequences. Additionally, "spontaneous" activity of these neurons during sleep matches their sensorimotor activity, a form of song "replay." These data suggest a model whereby sensorimotor correspondences are stored during singing but do not modify behavior, and off-line comparison (e.g., during sleep) of rehearsed motor output and predicted sensory feedback is used to adaptively shape motor output.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dave, A S -- Margoliash, D -- MH11615/MH/NIMH NIH HHS/ -- MH59831/MH/NIMH NIH HHS/ -- MH60276/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2000 Oct 27;290(5492):812-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Organismal Biology and Anatomy, University of Chicago, 1027 East 57 Street, Chicago, IL 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11052946" target="_blank"〉PubMed〈/a〉
    Keywords: *Acoustic Stimulation ; Action Potentials ; Animals ; Feedback ; Learning/*physiology ; Male ; Motor Neurons/physiology ; Neurons/*physiology ; Neurons, Afferent/physiology ; Prosencephalon/*physiology ; Sleep/physiology ; Songbirds/*physiology ; Vocalization, Animal/*physiology
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    Pig cloning by microinjection of fetal fibroblast nuclei (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-19
    Description: Pig cloning will have a marked impact on the optimization of meat production and xenotransplantation. To clone pigs from differentiated cells, we microinjected the nuclei of porcine (Sus scrofa) fetal fibroblasts into enucleated oocytes, and development was induced by electroactivation. The transfer of 110 cloned embryos to four surrogate mothers produced an apparently normal female piglet. The clonal provenance of the piglet was indicated by her coat color and confirmed by DNA microsatellite analysis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Onishi, A -- Iwamoto, M -- Akita, T -- Mikawa, S -- Takeda, K -- Awata, T -- Hanada, H -- Perry, A C -- New York, N.Y. -- Science. 2000 Aug 18;289(5482):1188-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Animal Breeding and Genetics, National Institute of Animal Industry, Tsukuba Norin Danchi, Ibaraki-ken 305-0901, Japan. onishi@niai.affrc.go.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10947985" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Cloning, Organism/*methods ; Electric Stimulation ; Embryo Transfer ; Embryonic and Fetal Development ; Female ; Fetus/cytology ; Fibroblasts/ultrastructure ; Microinjections ; Microsatellite Repeats ; *Nuclear Transfer Techniques ; Oocytes ; Pregnancy ; *Swine/embryology/genetics
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    Requirement for DARPP-32 in progesterone-facilitated sexual receptivity in female rats and mice (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-02-11
    Description: DARPP-32, a dopamine- and adenosine 3',5'-monophosphate (cAMP)-regulated phosphoprotein (32 kilodaltons in size), is an obligate intermediate in progesterone (P)-facilitated sexual receptivity in female rats and mice. The facilitative effect of P on sexual receptivity in female rats was blocked by antisense oligonucleotides to DARPP-32. Homozygous mice carrying a null mutation for the DARPP-32 gene exhibited minimal levels of P-facilitated sexual receptivity when compared to their wild-type littermates. P significantly increased hypothalamic cAMP levels and cAMP-dependent protein kinase activity. These increases were not inhibited by a D1 subclass dopamine receptor antagonist. P also enhanced phosphorylation of DARPP-32 on threonine 34 in the hypothalamus of mice. DARPP-32 activation is thus an obligatory step in progestin receptor regulation of sexual receptivity in rats and mice.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mani, S K -- Fienberg, A A -- O'Callaghan, J P -- Snyder, G L -- Allen, P B -- Dash, P K -- Moore, A N -- Mitchell, A J -- Bibb, J -- Greengard, P -- O'Malley, B W -- MH49662/MH/NIMH NIH HHS/ -- MH57442/MH/NIMH NIH HHS/ -- NS 35457/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 2000 Feb 11;287(5455):1053-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA. smani@bcm.tmc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10669419" target="_blank"〉PubMed〈/a〉
    Keywords: 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/pharmacology ; Animals ; Cyclic AMP/metabolism ; Cyclic AMP-Dependent Protein Kinases/metabolism ; Dopamine/pharmacology ; Dopamine Agonists/pharmacology ; Dopamine and cAMP-Regulated Phosphoprotein 32 ; Female ; Hypothalamus/metabolism ; Injections, Intraventricular ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; *Nerve Tissue Proteins ; Oligonucleotides, Antisense/pharmacology ; Phosphoproteins/genetics/*metabolism ; Phosphorylation ; Posture ; Progesterone/*pharmacology ; Proteins/genetics/metabolism ; Rats ; Rats, Sprague-Dawley ; Receptors, Progesterone/metabolism ; Serotonin/pharmacology ; Sexual Behavior, Animal/*drug effects ; Signal Transduction
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    An early taste of things to come (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-09-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marcus, M -- New York, N.Y. -- Science. 2000 Sep 15;289(5486):1878.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11012357" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn/physiology ; Embryonic and Fetal Development ; Female ; *Food Preferences/physiology ; Humans ; Rats ; *Taste
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    Anthropology. Age, sex, and old goats (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-04-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marean, C W -- New York, N.Y. -- Science. 2000 Mar 24;287(5461):2174-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anthropology, State University of New York, Stony Brook, NY 11794, USA. curtis.marean@sunysb.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10744540" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animal Husbandry/*history ; Animals ; *Animals, Domestic/anatomy & histology/physiology ; Archaeology ; Female ; *Goats/anatomy & histology/physiology ; History, Ancient ; Humans ; Iran ; Iraq ; Male ; Sex Characteristics ; Sheep/anatomy & histology/physiology
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    Heterozygous germ line hCHK2 mutations in Li-Fraumeni syndrome (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-05
    Description: The hCHK2 gene encodes the human homolog of the yeast Cds1 and Rad53 G2 checkpoint kinases, whose activation in response to DNA damage prevents cellular entry into mitosis. Here, it is shown that heterozygous germ line mutations in hCHK2 occur in Li-Fraumeni syndrome, a highly penetrant familial cancer phenotype usually associated with inherited mutations in the TP53 gene. These observations suggest that hCHK2 is a tumor suppressor gene conferring predisposition to sarcoma, breast cancer, and brain tumors, and they also provide a link between the central role of p53 inactivation in human cancer and the well-defined G2 checkpoint in yeast.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bell, D W -- Varley, J M -- Szydlo, T E -- Kang, D H -- Wahrer, D C -- Shannon, K E -- Lubratovich, M -- Verselis, S J -- Isselbacher, K J -- Fraumeni, J F -- Birch, J M -- Li, F P -- Garber, J E -- Haber, D A -- New York, N.Y. -- Science. 1999 Dec 24;286(5449):2528-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Massachusetts General Hospital Center for Cancer Risk Analysis and Harvard Medical School, Building 149, Charlestown, MA 02129, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10617473" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Apoptosis ; Brain Neoplasms/genetics ; Breast Neoplasms/genetics ; Checkpoint Kinase 2 ; Female ; G1 Phase ; *G2 Phase ; *Genes, Tumor Suppressor ; Genes, p53 ; Genetic Predisposition to Disease ; *Germ-Line Mutation ; Heterozygote ; Humans ; Li-Fraumeni Syndrome/enzymology/*genetics/pathology ; Male ; Pedigree ; Polymorphism, Genetic ; Protein Kinases/genetics ; Protein-Serine-Threonine Kinases/*genetics/metabolism ; Sarcoma/genetics ; Signal Transduction ; Tumor Cells, Cultured
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    Cortical mechanisms of human imitation (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-05
    Description: How does imitation occur? How can the motor plans necessary for imitating an action derive from the observation of that action? Imitation may be based on a mechanism directly matching the observed action onto an internal motor representation of that action ("direct matching hypothesis"). To test this hypothesis, normal human participants were asked to observe and imitate a finger movement and to perform the same movement after spatial or symbolic cues. Brain activity was measured with functional magnetic resonance imaging. If the direct matching hypothesis is correct, there should be areas that become active during finger movement, regardless of how it is evoked, and their activation should increase when the same movement is elicited by the observation of an identical movement made by another individual. Two areas with these properties were found in the left inferior frontal cortex (opercular region) and the rostral-most region of the right superior parietal lobule.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Iacoboni, M -- Woods, R P -- Brass, M -- Bekkering, H -- Mazziotta, J C -- Rizzolatti, G -- New York, N.Y. -- Science. 1999 Dec 24;286(5449):2526-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Brain Mapping Center, Neuropsychiatric Institute, Department of Psychiatry, UCLA School of Medicine, Los Angeles, CA 90095-7085, USA. iacoboni@loni.ucla.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10617472" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Brain Mapping ; Cues ; Female ; Fingers/physiology ; Frontal Lobe/*physiology ; Humans ; Imitative Behavior/*physiology ; Magnetic Resonance Imaging ; Male ; Movement ; Neurons/physiology ; Parietal Lobe/*physiology
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    Gene therapy death prompts review of adenovirus vector (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1999 Dec 17;286(5448):2244-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10636774" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviruses, Human/*genetics ; Adolescent ; Advisory Committees ; *Clinical Trials as Topic ; Fatal Outcome ; Genetic Therapy/*adverse effects ; Genetic Vectors/*adverse effects ; Humans ; Male ; National Institutes of Health (U.S.) ; Ornithine Carbamoyltransferase/genetics ; Ornithine Carbamoyltransferase Deficiency Disease/*therapy ; *Research Subjects ; United States
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    Were Spaniards among the first Americans? (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1999 Nov 19;286(5444):1467-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10712138" target="_blank"〉PubMed〈/a〉
    Keywords: Americas ; Animals ; *Archaeology ; Asia ; Australia ; Emigration and Immigration/history ; Europe ; Female ; History, Ancient ; *Hominidae ; Humans ; Paleontology ; Skull/anatomy & histology
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    Perspectives: evolutionary biology. Sex and death (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Resznick, D N -- Ghalambor, C -- New York, N.Y. -- Science. 1999 Dec 24;286(5449):2458-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of California, Riverside, CA 92521, USA. david.reznick@ucr.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10636809" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging/genetics ; Animals ; *Biological Evolution ; Drosophila/genetics/physiology ; Female ; *Longevity/genetics ; Male ; *Reproduction/genetics ; Selection, Genetic
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    In contrast to Dolly, cloning resets telomere clock in cattle (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-05-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2000 Apr 28;288(5466):586-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10798984" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/genetics ; Animals ; Bioethics ; Cattle/*genetics ; *Cell Aging/genetics ; Cell Division ; Cells, Cultured ; *Cloning, Organism ; Female ; Nuclear Transfer Techniques ; Oocytes/physiology ; Stem Cells ; Telomere/*ultrastructure
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    Black-footed ferret recovery (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-06-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dobson, A -- Lyles, A -- New York, N.Y. -- Science. 2000 May 12;288(5468):985-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolutionary Biology, Princeton University, NJ 08544, USA. andy@eno.princeton.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10841720" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Husbandry ; Animals ; Animals, Zoo ; Breeding ; *Conservation of Natural Resources ; Female ; *Ferrets/genetics/physiology ; Founder Effect ; Genetics, Population ; Male ; Northwestern United States ; Predatory Behavior ; Sciuridae ; Southwestern United States
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    Epidemiology. Duke study faults overuse of stimulants for children (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-19
    Description: Some experts are growing concerned that Ritalin, a stimulant of the central nervous system used to calm a type of fidgety behavior called "attention-deficit hyperactivity disorder" (ADHD), is overused. Most psychiatrists think, however, that stimulants are being underprescribed, because too many cases of ADHD are going untreated. Now, an authoritative study published in this month's Journal of the American Academy of Child and Adolescent Psychiatry shows that Ritalin is being given to many children who don't fit the diagnosis of ADHD, while others who do are not receiving the drug.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 2000 Aug 4;289(5480):721.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10950713" target="_blank"〉PubMed〈/a〉
    Keywords: Attention Deficit Disorder with Hyperactivity/*diagnosis/*drug ; therapy/epidemiology ; Central Nervous System Stimulants/*therapeutic use ; Child ; Drug Utilization ; Female ; Humans ; Male ; Methylphenidate/*therapeutic use ; United States/epidemiology
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    Study of HIV transmission sparks ethics debate (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-04-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2000 Apr 7;288(5463):22-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10766625" target="_blank"〉PubMed〈/a〉
    Keywords: Anti-Bacterial Agents/therapeutic use ; Anti-HIV Agents/therapeutic use ; Clinical Trials as Topic/*standards ; *Disclosure ; Disease Transmission, Infectious ; *Ethics, Medical ; Female ; HIV Infections/drug therapy/*transmission/*virology ; HIV-1/*physiology ; Humans ; Male ; Moral Obligations ; Publishing ; Research Subjects ; *Sexual Partners ; Uganda ; Viral Load
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  • 45
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    Cooperative regulation of cell polarity and growth by Drosophila tumor suppressors (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-07
    Description: Loss of cell polarity and tissue architecture are characteristics of malignant cancers derived from epithelial tissues. We provide evidence from Drosophila that a group of membrane-associated proteins act in concert to regulate both epithelial structure and cell proliferation. Scribble (Scrib) is a cell junction-localized protein required for polarization of embryonic and, as demonstrated here, imaginal disc and follicular epithelia. We show that the tumor suppressors lethal giant larvae (lgl) and discs-large (dlg) have identical effects on all three epithelia, and that scrib also acts as a tumor suppressor. Scrib and Dlg colocalize and overlap with Lgl in epithelia; activity of all three genes is required for cortical localization of Lgl and junctional localization of Scrib and Dlg. scrib, dlg, and lgl show strong genetic interactions. Our data indicate that the three tumor suppressors act together in a common pathway to regulate cell polarity and growth control.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bilder, D -- Li, M -- Perrimon, N -- New York, N.Y. -- Science. 2000 Jul 7;289(5476):113-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics and Howard Hughes Medical Institute, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA. bilder@rascal.med.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10884224" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division ; Cell Membrane/metabolism ; *Cell Polarity ; Cell Transformation, Neoplastic ; Cytoplasm/metabolism ; Drosophila/*cytology/genetics/growth & development ; *Drosophila Proteins ; Embryo, Nonmammalian/cytology ; Epidermis/embryology/metabolism/ultrastructure ; Epithelial Cells/cytology/metabolism ; Female ; Genes, Insect ; *Genes, Tumor Suppressor ; Insect Proteins/genetics/*metabolism ; Intercellular Junctions/metabolism/ultrastructure ; Membrane Proteins/genetics/*metabolism ; Morphogenesis ; Mutation ; Phenotype ; *Tumor Suppressor Proteins
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Neuroscience. Death triggers regrowth of zebra finch neurons (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogel, G -- New York, N.Y. -- Science. 2000 Feb 25;287(5457):1381.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10722378" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*cytology ; Cell Death ; Cell Division ; Male ; Neurons/*cytology/physiology ; Songbirds/anatomy & histology/*physiology ; Vocalization, Animal
    Print ISSN: 0036-8075
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    From marrow to brain: expression of neuronal phenotypes in adult mice (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-12-02
    Description: After intravascular delivery of genetically marked adult mouse bone marrow into lethally irradiated normal adult hosts, donor-derived cells expressing neuronal proteins (neuronal phenotypes) developed in the central nervous system. Flow cytometry revealed a population of donor-derived cells in the brain with characteristics distinct from bone marrow. Confocal microscopy of individual cells showed that hundreds of marrow-derived cells in brain sections expressed gene products typical of neurons (NeuN, 200-kilodalton neurofilament, and class III beta-tubulin) and were able to activate the transcription factor cAMP response element-binding protein (CREB). The generation of neuronal phenotypes in the adult brain 1 to 6 months after an adult bone marrow transplant demonstrates a remarkable plasticity of adult tissues with potential clinical applications.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brazelton, T R -- Rossi, F M -- Keshet, G I -- Blau, H M -- AG09521/AG/NIA NIH HHS/ -- CA59717/CA/NCI NIH HHS/ -- HD18179/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2000 Dec 1;290(5497):1775-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Pharmacology, CCSR 4215, 269 Campus Drive, Stanford University, Stanford, CA 94305-5175, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11099418" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biomarkers/analysis ; Bone Marrow Cells/*cytology ; *Bone Marrow Transplantation ; Brain/*cytology ; Cell Differentiation ; Cell Size ; Cyclic AMP Response Element-Binding Protein/metabolism ; Flow Cytometry ; Gene Expression ; Green Fluorescent Proteins ; Luminescent Proteins/analysis ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Microscopy, Confocal ; Nerve Tissue Proteins/analysis/genetics ; Neurons/chemistry/*cytology/metabolism ; Olfactory Bulb/cytology ; Phenotype ; Phosphorylation
    Print ISSN: 0036-8075
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    Extension of cell life-span and telomere length in animals cloned from senescent somatic cells (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-04-28
    Description: The potential of cloning depends in part on whether the procedure can reverse cellular aging and restore somatic cells to a phenotypically youthful state. Here, we report the birth of six healthy cloned calves derived from populations of senescent donor somatic cells. Nuclear transfer extended the replicative life-span of senescent cells (zero to four population doublings remaining) to greater than 90 population doublings. Early population doubling level complementary DNA-1 (EPC-1, an age-dependent gene) expression in cells from the cloned animals was 3.5- to 5-fold higher than that in cells from age-matched (5 to 10 months old) controls. Southern blot and flow cytometric analyses indicated that the telomeres were also extended beyond those of newborn (〈2 weeks old) and age-matched control animals. The ability to regenerate animals and cells may have important implications for medicine and the study of mammalian aging.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lanza, R P -- Cibelli, J B -- Blackwell, C -- Cristofalo, V J -- Francis, M K -- Baerlocher, G M -- Mak, J -- Schertzer, M -- Chavez, E A -- Sawyer, N -- Lansdorp, P M -- West, M D -- AG00378/AG/NIA NIH HHS/ -- AI29524/AI/NIAID NIH HHS/ -- GM56162/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Apr 28;288(5466):665-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Advanced Cell Technology, One Innovation Drive, Worcester, MA 01605, USA. rlanza@advancedcell.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10784448" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blotting, Southern ; Cattle/*genetics ; *Cell Aging ; Cell Division ; Cells, Cultured ; Clone Cells ; *Cloning, Organism ; DNA, Complementary ; Embryo Transfer ; *Eye Proteins ; Female ; Fibroblasts ; Flow Cytometry ; In Situ Hybridization, Fluorescence ; Longevity ; Matched-Pair Analysis ; *Nerve Growth Factors ; *Nuclear Transfer Techniques ; Proteins/genetics ; RNA, Messenger/genetics/metabolism ; Serpins/genetics ; Telomere/*ultrastructure
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    The violence of the lambs (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-12
    Description: Researchers are increasingly coming to view violence as the end result of multiple risk factors that may include a biological vulnerability that can be brought out or reinforced by social environment. Longitudinal studies are demonstrating that children who become chronically violent adults generally are difficult from early childhood. But just which early risk factors are most powerful, and how they interact, is proving very tough to sort out.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 2000 Jul 28;289(5479):580-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10939972" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; *Aggression/psychology ; Behavior Therapy ; Central Nervous System/physiology ; Child ; Child, Preschool ; Female ; Genes ; Humans ; Juvenile Delinquency ; Longitudinal Studies ; Male ; Parenting ; Personality Disorders/psychology ; Psychotropic Drugs/therapeutic use ; Risk Factors ; *Social Environment ; *Violence/psychology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Linkage of plasma Abeta42 to a quantitative locus on chromosome 10 in late-onset Alzheimer's disease pedigrees (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-12-23
    Description: Plasma Abeta42 (amyloid beta42 peptide) is invariably elevated in early-onset familial Alzheimer's disease (AD), and it is also increased in the first-degree relatives of patients with typical late-onset AD (LOAD). To detect LOAD loci that increase Abeta42, we used plasma Abeta42 as a surrogate trait and performed linkage analysis on extended AD pedigrees identified through a LOAD patient with extremely high plasma Abeta. Here, we report linkage to chromosome 10 with a maximal lod score of 3.93 at 81 centimorgans close to D10S1225. Remarkably, linkage to the same region was obtained independently in a genome-wide screen of LOAD sibling pairs. These results provide strong evidence for a novel LOAD locus on chromosome 10 that acts to increase Abeta.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ertekin-Taner, N -- Graff-Radford, N -- Younkin, L H -- Eckman, C -- Baker, M -- Adamson, J -- Ronald, J -- Blangero, J -- Hutton, M -- Younkin, S G -- AG06656/AG/NIA NIH HHS/ -- MH59490/MH/NIMH NIH HHS/ -- P50 AG16574/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2000 Dec 22;290(5500):2303-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Mayo Clinic Jacksonville, Jacksonville, FL 32224, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11125143" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Age of Onset ; Aged ; Aged, 80 and over ; Alzheimer Disease/*blood/*genetics ; Amyloid beta-Peptides/*blood/genetics ; Chromosomes, Human, Pair 10/*genetics ; Female ; *Genetic Linkage ; Genetic Markers ; Genetic Predisposition to Disease ; Humans ; Lod Score ; Male ; Middle Aged ; Pedigree ; Peptide Fragments/*blood/genetics ; Phenotype ; *Quantitative Trait, Heritable
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    Molecular biology. RNA interference (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-04-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sharp, P A -- Zamore, P D -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2431-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. sharppa@mit.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10766620" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/*genetics ; *Caenorhabditis elegans Proteins ; *DNA Transposable Elements ; Female ; *Gene Expression Regulation ; *Gene Silencing ; Genes, Helminth ; Helminth Proteins/genetics/physiology ; Male ; Mutation ; RNA, Double-Stranded/*genetics ; RNA, Helminth/*genetics/metabolism ; RNA, Messenger/*genetics/metabolism
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    Correlates of sleep and waking in Drosophila melanogaster (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-10
    Description: Drosophila exhibits a circadian rest-activity cycle, but it is not known whether fly rest constitutes sleep or is mere inactivity. It is shown here that, like mammalian sleep, rest in Drosophila is characterized by an increased arousal threshold and is homeostatically regulated independently of the circadian clock. As in mammals, rest is abundant in young flies, is reduced in older flies, and is modulated by stimulants and hypnotics. Several molecular markers modulated by sleep and waking in mammals are modulated by rest and activity in Drosophila, including cytochrome oxidase C, the endoplasmic reticulum chaperone protein BiP, and enzymes implicated in the catabolism of monoamines. Flies lacking one such enzyme, arylalkylamine N-acetyltransferase, show increased rest after rest deprivation. These results implicate the catabolism of monoamines in the regulation of sleep and waking in the fly and suggest that Drosophila may serve as a model system for the genetic dissection of sleep.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shaw, P J -- Cirelli, C -- Greenspan, R J -- Tononi, G -- New York, N.Y. -- Science. 2000 Mar 10;287(5459):1834-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Neurosciences Institute, 10640 John Jay Hopkins Drive, San Diego, CA 92121, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10710313" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arylamine N-Acetyltransferase/genetics/metabolism ; Behavior, Animal/drug effects ; Biogenic Monoamines/metabolism ; Caffeine/pharmacology ; Carrier Proteins/genetics/metabolism ; Circadian Rhythm/*physiology ; Cytochrome P-450 Enzyme System/genetics/metabolism ; *Drosophila Proteins ; Drosophila melanogaster/drug effects/genetics/*physiology ; Fatty Acid Synthases/genetics/metabolism ; Female ; Gene Dosage ; Gene Expression Profiling ; Genes, Insect ; HSC70 Heat-Shock Proteins ; *HSP70 Heat-Shock Proteins ; Homeostasis ; Hydroxyzine/pharmacology ; Mutation ; Rest/physiology ; Sleep/drug effects/*physiology ; Transcription, Genetic ; Wakefulness/drug effects/physiology
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    Preventing cervical cancer (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-06
    Description: The Pap smear has been the classic screening strategy for preventing cervical cancer for 50 years. The finding that infection with human papillomavirus is associated with an increased risk of cervical cancer has prompted the development of new strategies for cervical cancer screening and prevention. In their Policy Forum, Cain and Howett discuss the introduction of HPV testing, anti-HPV microbicidal agents and vaccination against HPV. They point out the benefits but also the potential for over and under treatment and the need for considerable improvements in public education.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cain, J M -- Howett, M K -- New York, N.Y. -- Science. 2000 Jun 9;288(5472):1753-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departments of Obstetrics and Gynecology, The Pennsylvania State University, College of Medicine MB103 HOSPITAL, Hershey, PA 17033, USA.jcain@psghs.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10877694" target="_blank"〉PubMed〈/a〉
    Keywords: Antiviral Agents/therapeutic use ; Cost-Benefit Analysis ; False Positive Reactions ; Female ; Humans ; Mass Screening ; *Papillomaviridae/immunology/isolation & purification/pathogenicity ; *Papillomavirus Infections/complications/diagnosis/drug therapy/prevention & ; control ; *Tumor Virus Infections/complications/diagnosis/drug therapy/prevention & control ; Uterine Cervical Neoplasms/diagnosis/*prevention & control/*virology ; Viral Vaccines
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    Women's health. Reports see progress, problems, in trials (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-06-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Helmuth, L -- New York, N.Y. -- Science. 2000 Jun 2;288(5471):1562-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10858128" target="_blank"〉PubMed〈/a〉
    Keywords: *Clinical Trials as Topic ; Female ; Financing, Government ; Humans ; Male ; National Institutes of Health (U.S.) ; Publishing ; *Research Subjects ; Research Support as Topic ; *Sex Characteristics ; United States ; *Women's Health
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    Cross-species interactions between malaria parasites in humans (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-02-05
    Description: The dynamics of multiple Plasmodium infections in asymptomatic children living under intense malaria transmission pressure provide evidence for a density-dependent regulation that transcends species as well as genotype. This regulation, in combination with species- and genotype-specific immune responses, results in nonindependent, sequential episodes of infection with each species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bruce, M C -- Donnelly, C A -- Alpers, M P -- Galinski, M R -- Barnwell, J W -- Walliker, D -- Day, K P -- AI24710/AI/NIAID NIH HHS/ -- AI37545/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2000 Feb 4;287(5454):845-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Wellcome Trust Centre for the Epidemiology of Infectious Disease, Department of Zoology, University of Oxford, Oxford, OX1 3FY, UK. marian.bruce@ceid.ox.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10657296" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Animals ; Child ; Child, Preschool ; Female ; Genotype ; Humans ; Malaria/immunology/*parasitology ; Malaria Vaccines ; Male ; Papua New Guinea ; Parasitemia/*parasitology ; Plasmodium/genetics/*physiology ; Plasmodium falciparum/physiology ; Plasmodium malariae/physiology ; Plasmodium vivax/physiology ; Species Specificity
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    Genes expressed in human tumor endothelium (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-19
    Description: To gain a molecular understanding of tumor angiogenesis, we compared gene expression patterns of endothelial cells derived from blood vessels of normal and malignant colorectal tissues. Of over 170 transcripts predominantly expressed in the endothelium, 79 were differentially expressed, including 46 that were specifically elevated in tumor-associated endothelium. Several of these genes encode extracellular matrix proteins, but most are of unknown function. Most of these tumor endothelial markers were expressed in a wide range of tumor types, as well as in normal vessels associated with wound healing and corpus luteum formation. These studies demonstrate that tumor and normal endothelium are distinct at the molecular level, a finding that may have significant implications for the development of anti-angiogenic therapies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉St Croix, B -- Rago, C -- Velculescu, V -- Traverso, G -- Romans, K E -- Montgomery, E -- Lal, A -- Riggins, G J -- Lengauer, C -- Vogelstein, B -- Kinzler, K W -- CA57345/CA/NCI NIH HHS/ -- CA62924/CA/NCI NIH HHS/ -- CGAP S98-146A/PHS HHS/ -- New York, N.Y. -- Science. 2000 Aug 18;289(5482):1197-202.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Johns Hopkins Oncology Center, Howard Hughes Medical Institute, Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10947988" target="_blank"〉PubMed〈/a〉
    Keywords: Biomarkers, Tumor ; Cell Separation ; Cells, Cultured ; Colon/*blood supply/metabolism ; Colorectal Neoplasms/*blood supply/genetics/metabolism/pathology ; Corpus Luteum/blood supply/metabolism ; Endothelium, Vascular/cytology/*metabolism/pathology ; Extracellular Matrix Proteins/genetics ; Female ; Gene Expression ; *Gene Expression Profiling ; Humans ; Intestinal Mucosa/blood supply/cytology/pathology ; Neoplasms/blood supply/genetics/metabolism ; Neovascularization, Pathologic/*genetics ; Neovascularization, Physiologic/genetics ; RNA, Messenger/genetics/metabolism ; Rectum/*blood supply/metabolism ; Tumor Cells, Cultured
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    Paleoanthropology. Is Alexander the Great's father missing, too? (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-05-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koenig, R -- New York, N.Y. -- Science. 2000 Apr 21;288(5465):411.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10798966" target="_blank"〉PubMed〈/a〉
    Keywords: Burial/*history ; Facial Bones/anatomy & histology/injuries ; *Famous Persons ; Greece ; History, Ancient ; Humans ; Male ; Mortuary Practice/history ; Paleontology ; Skull/anatomy & histology
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    A critical role for murine complement regulator crry in fetomaternal tolerance (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-22
    Description: Complement is a component of natural immunity. Its regulation is needed to protect tissues from inflammation, but mice with a disrupted gene for the complement regulator decay accelerating factor were normal. Mice that were deficient in another murine complement regulator, Crry, were generated to investigate its role in vivo. Survival of Crry-/- embryos was compromised because of complement deposition and concomitant placenta inflammation. Complement activation at the fetomaternal interface caused the fetal loss because breeding to C3-/- mice rescued Crry-/- mice from lethality. Thus, the regulation of complement is critical in fetal control of maternal processes that mediate tissue damage.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xu, C -- Mao, D -- Holers, V M -- Palanca, B -- Cheng, A M -- Molina, H -- R01 AI40576-01/AI/NIAID NIH HHS/ -- R01 AI44912-01/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2000 Jan 21;287(5452):498-501.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10642554" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Complement Activation ; Complement C3/analysis/immunology ; Embryo, Mammalian/*immunology/metabolism ; *Embryonic and Fetal Development ; Female ; Gene Targeting ; *Immune Tolerance ; Mice ; Neutrophil Infiltration ; Pregnancy ; Receptors, Complement/genetics/*physiology ; Trophoblasts/immunology/metabolism
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    Turning blood into brain: cells bearing neuronal antigens generated in vivo from bone marrow (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-12-02
    Description: Bone marrow stem cells give rise to a variety of hematopoietic lineages and repopulate the blood throughout adult life. We show that, in a strain of mice incapable of developing cells of the myeloid and lymphoid lineages, transplanted adult bone marrow cells migrated into the brain and differentiated into cells that expressed neuron-specific antigens. These findings raise the possibility that bone marrow-derived cells may provide an alternative source of neurons in patients with neurodegenerative diseases or central nervous system injury.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mezey, E -- Chandross, K J -- Harta, G -- Maki, R A -- McKercher, S R -- AI30656/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2000 Dec 1;290(5497):1779-82.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Basic Neuroscience Program, Laboratory of Developmental Neurogenetics, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA. mezey@codon.nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11099419" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens/analysis ; Biomarkers/analysis ; Bone Marrow Cells/*cytology/physiology ; *Bone Marrow Transplantation ; Brain/*cytology ; Cell Differentiation ; Cell Movement ; Female ; Immunoenzyme Techniques ; Intermediate Filament Proteins/analysis ; Male ; Mice ; Mice, Knockout ; Microscopy, Confocal ; Nerve Tissue Proteins/analysis/immunology ; Nestin ; Neurons/chemistry/*cytology/immunology ; Phosphopyruvate Hydratase/analysis ; *Stem Cell Transplantation ; Stem Cells/chemistry/*cytology ; Y Chromosome
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Abolition and reversal of strain differences in behavioral responses to drugs of abuse after a brief experience (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-21
    Description: Inbred strains of mice are largely used to identify the genetic basis of normal and pathological behaviors. This report demonstrates that a moderate period of food shortage, an ecologically common experience, can reverse or abolish strain differences in behavioral responses to the abused psychostimulant amphetamine. The period of food shortage occurred when the animals were mature and was terminated before the administration of amphetamine. Strain differences in behavior appear highly dependent on environmental experiences. Consequently, to identify biological determinants of behavior, an integrated approach considering the interaction between environmental and genetic factors needs to be used.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cabib, S -- Orsini, C -- Le Moal, M -- Piazza, P V -- New York, N.Y. -- Science. 2000 Jul 21;289(5478):463-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dipartimento di Psicologia, Universita "La Sapienza" via dei Marsi 78, Roma I-00185, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10903209" target="_blank"〉PubMed〈/a〉
    Keywords: Amphetamine/*pharmacology ; Animals ; Behavior, Animal/*drug effects ; Central Nervous System Stimulants/*pharmacology ; Conditioning (Psychology)/drug effects ; *Food Deprivation ; Genes ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Inbred DBA ; Motor Activity/drug effects ; Phenotype ; Species Specificity ; Substance-Related Disorders/*etiology ; Weight Loss
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    Natural selection and the reinforcement of mate recognition (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-10-20
    Description: Natural selection on mate recognition may often contribute to speciation, resulting in reproductive character displacement. Field populations of Drosophila serrata display reproductive character displacement in cuticular hydrocarbons when sympatric with Drosophila birchii. We exposed field sympatric and allopatric populations of D. serrata to experimental sympatry with D. birchii for nine generations. Cuticular hydrocarbons of field allopatric D. serrata populations evolved to resemble the field sympatric populations, whereas field sympatric D. serrata populations remained unchanged. Our experiment indicates that natural selection on mate recognition resulted in the field pattern of reproductive character displacement.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Higgie, M -- Chenoweth, S -- Blows, M W -- New York, N.Y. -- Science. 2000 Oct 20;290(5491):519-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology and Entomology, University of Queensland, St. Lucia 4072, Australia. MHiggie@zoology.uq.edu.au〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11039933" target="_blank"〉PubMed〈/a〉
    Keywords: Analysis of Variance ; Animals ; Australia ; *Biological Evolution ; Discriminant Analysis ; Drosophila/chemistry/*genetics/*physiology ; *Ecosystem ; Female ; Genetic Variation ; Hydrocarbons/analysis ; Male ; Pheromones/analysis ; Reproduction ; *Selection, Genetic ; Sexual Behavior, Animal
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    Controversial cancer therapy finds political support (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-04-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaiser, J -- New York, N.Y. -- Science. 2000 Mar 24;287(5461):2139-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10744531" target="_blank"〉PubMed〈/a〉
    Keywords: Antineoplastic Agents/*therapeutic use ; Brain Neoplasms/*drug therapy ; Child, Preschool ; Clinical Trials as Topic/*legislation & jurisprudence ; Government ; Humans ; Male ; Medulloblastoma/drug therapy ; Patient Advocacy ; Patient Participation ; Peptides/*therapeutic use ; Politics ; United States ; United States Food and Drug Administration/*legislation & jurisprudence
    Print ISSN: 0036-8075
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    Social science. Stress: the invisible hand in Eastern Europe's death rates (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-07-06
    Description: The end of communism opened up a life of economic uncertainty in the Eastern Bloc. And that, say some social scientists, may be exerting a deadly effect on residents, whose high expectations that their lives would improve were quickly dashed by the bumpy transition to a market economy. Disillusionment led to stress and depression, and depression was a harbinger of death.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stone, R -- New York, N.Y. -- Science. 2000 Jun 9;288(5472):1732-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10877687" target="_blank"〉PubMed〈/a〉
    Keywords: Communism ; Coronary Disease/etiology/*mortality/psychology ; Depression/complications/*epidemiology ; Europe, Eastern ; Female ; Humans ; Life Expectancy ; Male ; *Mortality ; *Political Systems ; Risk Factors ; *Social Change ; Stress, Psychological/complications/*epidemiology
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    Similar requirements of a plant symbiont and a mammalian pathogen for prolonged intracellular survival (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-03-31
    Description: Brucella abortus, a mammalian pathogen, and Rhizobium meliloti, a phylogenetically related plant symbiont, establish chronic infections in their respective hosts. Here a highly conserved B. abortus homolog of the R. meliloti bacA gene, which encodes a putative cytoplasmic membrane transport protein required for symbiosis, was identified. An isogenic B. abortus bacA mutant exhibited decreased survival in macrophages and greatly accelerated clearance from experimentally infected mice compared to the virulent parental strain. Thus, the bacA gene product is critical for the maintenance of two very diverse host-bacterial relationships.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉LeVier, K -- Phillips, R W -- Grippe, V K -- Roop, R M 2nd -- Walker, G C -- GM31030/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2492-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10741969" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Bacterial/immunology ; Bacterial Proteins/genetics/*physiology ; Brucella abortus/genetics/*pathogenicity/physiology ; Brucellosis/immunology/*microbiology ; Cells, Cultured ; Female ; Hypersensitivity, Delayed ; Liver/microbiology ; Macrophages/immunology/*microbiology ; Medicago sativa/microbiology ; Membrane Proteins/genetics/*physiology ; *Membrane Transport Proteins ; Mice ; Mice, Inbred BALB C ; Molecular Sequence Data ; Mutagenesis, Insertional ; Sinorhizobium meliloti/genetics/*physiology ; Spleen/microbiology ; Symbiosis ; Virulence
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    Hematopoietic stem cell quiescence maintained by p21cip1/waf1 (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-03-10
    Description: Relative quiescence is a defining characteristic of hematopoietic stem cells, while their progeny have dramatic proliferative ability and inexorably move toward terminal differentiation. The quiescence of stem cells has been conjectured to be of critical biologic importance in protecting the stem cell compartment, which we directly assessed using mice engineered to be deficient in the G1 checkpoint regulator, cyclin-dependent kinase inhibitor, p21cip1/waf1 (p21). In the absence of p21, hematopoietic stem cell proliferation and absolute number were increased under normal homeostatic conditions. Exposing the animals to cell cycle-specific myelotoxic injury resulted in premature death due to hematopoietic cell depletion. Further, self-renewal of primitive cells was impaired in serially transplanted bone marrow from p21-/- mice, leading to hematopoietic failure. Therefore, p21 is the molecular switch governing the entry of stem cells into the cell cycle, and in its absence, increased cell cycling leads to stem cell exhaustion. Under conditions of stress, restricted cell cycling is crucial to prevent premature stem cell depletion and hematopoietic death.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cheng, T -- Rodrigues, N -- Shen, H -- Yang, Y -- Dombkowski, D -- Sykes, M -- Scadden, D T -- AI07387/AI/NIAID NIH HHS/ -- DK50234/DK/NIDDK NIH HHS/ -- HL44851/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 2000 Mar 10;287(5459):1804-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Experimental Hematology, AIDS Research Center, Massachusetts General Hospital Cancer Center, Transplantation Biology Research Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10710306" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antimetabolites/pharmacology ; Blood Cell Count ; Bone Marrow Transplantation ; Cell Count ; *Cell Cycle ; Cell Death ; Cell Differentiation ; Cell Division ; Coculture Techniques ; Colony-Forming Units Assay ; Cyclin-Dependent Kinase Inhibitor p21 ; Cyclins/genetics/*physiology ; Female ; Fluorouracil/pharmacology ; *Hematopoiesis ; Hematopoietic Stem Cells/*cytology/drug effects/physiology ; Homeostasis ; Male ; Mice ; Mice, Inbred Strains
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    Therapeutic approaches to bone diseases (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-09-01
    Description: The strength and integrity of our bones depends on maintaining a delicate balance between bone resorption by osteoclasts and bone formation by osteoblasts. As we age or as a result of disease, this delicate balancing act becomes tipped in favor of osteoclasts so that bone resorption exceeds bone formation, rendering bones brittle and prone to fracture. A better understanding of the biology of osteoclasts and osteoblasts is providing opportunities for developing therapeutics to treat diseases of bone. Drugs that inhibit the formation or activity of osteoclasts are valuable for treating osteoporosis, Paget's disease, and inflammation of bone associated with rheumatoid arthritis or periodontal disease. Far less attention has been paid to promoting bone formation with, for example, growth factors or hormones, an approach that would be a valuable adjunct therapy for patients receiving inhibitors of bone resorption.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rodan, G A -- Martin, T J -- New York, N.Y. -- Science. 2000 Sep 1;289(5484):1508-14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Merck Research Laboratories, West Point, PA 19486, USA. St. Vincent's Institute of Medical Research, Melbourne 3065, Australia. gideon_rodan@merck.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10968781" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Diseases/*drug therapy/genetics/physiopathology/therapy ; Bone Resorption/drug therapy ; Calcitonin/therapeutic use ; Diphosphonates/therapeutic use ; Estrogen Receptor Modulators/therapeutic use ; Estrogens/therapeutic use ; Female ; Genetic Therapy ; Growth Substances/therapeutic use ; Humans ; Male ; Osteoclasts/drug effects ; Osteogenesis/drug effects ; Osteoporosis/*drug therapy/genetics/physiopathology/therapy ; Parathyroid Hormone/therapeutic use
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    Dual signaling regulated by calcyon, a D1 dopamine receptor interacting protein (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-03-04
    Description: The synergistic response of cells to the stimulation of multiple receptors has been ascribed to receptor cross talk; however, the specific molecules that mediate the resultant signal amplification have not been defined. Here a 24-kilodalton single transmembrane protein, designated calcyon, we functionally characterize that interacts with the D1 dopamine receptor. Calcyon localizes to dendritic spines of D1 receptor-expressing pyramidal cells in prefrontal cortex. These studies delineate a mechanism of Gq- and Gs-coupled heterotrimeric GTP-binding protein-coupled receptor cross talk by which D1 receptors can shift effector coupling to stimulate robust intracellular calcium (Ca2+i) release as a result of interaction with calcyon. The role of calcyon in potentiating Ca2+-dependent signaling should provide insight into the D1 receptor-modulated cognitive functions of prefrontal cortex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lezcano, N -- Mrzljak, L -- Eubanks, S -- Levenson, R -- Goldman-Rakic, P -- Bergson, C -- MH56608/MH/NIMH NIH HHS/ -- P50 MH068789/MH/NIMH NIH HHS/ -- P50 MH44866/MH/NIMH NIH HHS/ -- R01 MH063271/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2000 Mar 3;287(5458):1660-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta, GA 30912-2300, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10698743" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Benzazepines/pharmacology ; Brain/cytology/metabolism ; Calcium/metabolism ; Calcium Signaling ; Cell Line ; Cyclic AMP/metabolism ; Dendrites/chemistry/metabolism ; Dopamine Agonists/pharmacology ; Female ; Heterotrimeric GTP-Binding Proteins/metabolism ; Humans ; Macaca mulatta ; Membrane Proteins/analysis/chemistry/genetics/*metabolism ; Molecular Sequence Data ; Prefrontal Cortex/cytology/*metabolism ; Pyramidal Cells/chemistry/*metabolism ; Rabbits ; *Receptor Cross-Talk ; Receptors, Dopamine D1/analysis/*metabolism ; Receptors, Neurotransmitter/metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Two-Hybrid System Techniques
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    Extended life-span conferred by cotransporter gene mutations in Drosophila (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-12-16
    Description: Aging is genetically determined and environmentally modulated. In a study of longevity in the adult fruit fly, Drosophila melanogaster, we found that five independent P-element insertional mutations in a single gene resulted in a near doubling of the average adult life-span without a decline in fertility or physical activity. Sequence analysis revealed that the product of this gene, named Indy (for I'm not dead yet), is most closely related to a mammalian sodium dicarboxylate cotransporter-a membrane protein that transports Krebs cycle intermediates. Indy was most abundantly expressed in the fat body, midgut, and oenocytes: the principal sites of intermediary metabolism in the fly. Excision of the P element resulted in a reversion to normal life-span. These mutations may create a metabolic state that mimics caloric restriction, which has been shown to extend life-span.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rogina, B -- Reenan, R A -- Nilsen, S P -- Helfand, S L -- AG14532/AG/NIA NIH HHS/ -- AG16667/AG/NIA NIH HHS/ -- R37 AG016667/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2000 Dec 15;290(5499):2137-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics and Developmental Biology, School of Medicine, University of Connecticut Health Center, 263 Farmington Avenue, Farmington CT 06030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11118146" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/*genetics ; Amino Acid Sequence ; Animals ; Behavior, Animal ; Biological Transport ; Carrier Proteins/chemistry/*genetics/metabolism ; Crosses, Genetic ; DNA Transposable Elements ; *Dicarboxylic Acid Transporters ; Digestive System/metabolism ; *Drosophila Proteins ; Drosophila melanogaster/*genetics/metabolism/physiology ; Energy Intake ; Energy Metabolism ; Fat Body/metabolism ; Female ; Fertility ; Gene Expression ; *Genes, Insect ; Longevity/*genetics ; Male ; Membrane Proteins/chemistry/metabolism ; Molecular Sequence Data ; Mutagenesis, Insertional ; Mutagenesis, Site-Directed ; *Organic Anion Transporters, Sodium-Dependent ; Sense Organs/cytology/metabolism ; Sequence Homology, Amino Acid ; *Symporters
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    Impaired cued and contextual memory in NPAS2-deficient mice (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-06-24
    Description: Neuronal PAS domain protein 2 (NPAS2) is a basic helix-loop-helix (bHLH) PAS domain transcription factor expressed in multiple regions of the vertebrate brain. Targeted insertion of a beta-galactosidase reporter gene (lacZ) resulted in the production of an NPAS2-lacZ fusion protein and an altered form of NPAS2 lacking the bHLH domain. The neuroanatomical expression pattern of NPAS2-lacZ was temporally and spatially coincident with formation of the mature frontal association/limbic forebrain pathway. NPAS2-deficient mice were subjected to a series of behavioral tests and were found to exhibit deficits in the long-term memory arm of the cued and contextual fear task. Thus, NPAS2 may serve a dedicated regulatory role in the acquisition of specific types of memory.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Garcia, J A -- Zhang, D -- Estill, S J -- Michnoff, C -- Rutter, J -- Reick, M -- Scott, K -- Diaz-Arrastia, R -- McKnight, S L -- AG12297/AG/NIA NIH HHS/ -- AG16450/AG/NIA NIH HHS/ -- NS01763/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 2000 Jun 23;288(5474):2226-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10864874" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avoidance Learning ; Basic Helix-Loop-Helix Transcription Factors ; Behavior, Animal ; Brain/metabolism/*physiology ; Conditioning (Psychology) ; Cues ; Fear ; Gene Targeting ; Helix-Loop-Helix Motifs ; Learning/*physiology ; Limbic System/metabolism/physiology ; Male ; Memory/*physiology ; Mice ; Nerve Tissue Proteins/chemistry/genetics/*physiology ; Prosencephalon/metabolism/physiology ; Recombinant Fusion Proteins/chemistry/metabolism ; Touch ; Transcription Factors/chemistry/genetics/*physiology ; Transcriptional Activation ; Transfection ; beta-Galactosidase/metabolism
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    The initial domestication of goats (Capra hircus) in the Zagros mountains 10,000 years ago (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-03-24
    Description: Initial goat domestication is documented in the highlands of western Iran at 10,000 calibrated calendar years ago. Metrical analyses of patterns of sexual dimorphism in modern wild goat skeletons (Capra hircus aegagrus) allow sex-specific age curves to be computed for archaeofaunal assemblages. A distinct shift to selective harvesting of subadult males marks initial human management and the transition from hunting to herding of the species. Direct accelerator mass spectrometry radiocarbon dates on skeletal elements provide a tight temporal context for the transition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zeder, M A -- Hesse, B -- New York, N.Y. -- Science. 2000 Mar 24;287(5461):2254-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Archaeobiology Program, Department of Anthropology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560-0112, USA. zeder.melinda@nmnh.si.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10731145" target="_blank"〉PubMed〈/a〉
    Keywords: Aging ; Animal Husbandry/*history ; Animals ; *Animals, Domestic/anatomy & histology/physiology ; Animals, Wild/anatomy & histology ; Archaeology ; Body Constitution ; Bone and Bones/anatomy & histology ; Climate ; Female ; *Goats/anatomy & histology/physiology ; History, Ancient ; Humans ; Iran ; Iraq ; Male ; Mass Spectrometry ; Sex Characteristics
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    Requirement for RORgamma in thymocyte survival and lymphoid organ development (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-07-06
    Description: Most developing thymocytes undergo apoptosis because they cannot interact productively with molecules encoded by the major histocompatibility complex. Here, we show that mice lacking the orphan nuclear hormone receptor RORgamma lose thymic expression of the anti-apoptotic factor Bcl-xL. RORgamma thus regulates the survival of CD4+8+ thymocytes and may control the temporal window during which thymocytes can undergo positive selection. RORgamma was also required for development of lymph nodes and Peyer's patches, but not splenic follicles. In its absence, there was loss of a population of CD3-CD4+CD45+ cells that normally express RORgamma and that are likely early progenitors of lymphoid organs. Hence, RORgamma has critical functions in T cell repertoire selection and lymphoid organogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, Z -- Unutmaz, D -- Zou, Y R -- Sunshine, M J -- Pierani, A -- Brenner-Morton, S -- Mebius, R E -- Littman, D R -- New York, N.Y. -- Science. 2000 Jun 30;288(5475):2369-73.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Pathogenesis Program, Skirball Institute of Biomolecular Medicine and Howard Hughes Medical Institute, New York University School of Medicine, New York, NY 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10875923" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; *CDC2-CDC28 Kinases ; Cell Count ; Cell Cycle ; Cell Survival ; Crosses, Genetic ; Cyclin-Dependent Kinase 2 ; Cyclin-Dependent Kinases/metabolism ; DNA-Binding Proteins/genetics/metabolism ; Female ; Gene Targeting ; Inhibitor of Differentiation Protein 2 ; Lymphoid Tissue/cytology/embryology/*growth & development ; Male ; Mice ; Mice, Inbred C57BL ; Nuclear Receptor Subfamily 1, Group F, Member 3 ; Protein-Serine-Threonine Kinases/metabolism ; Proto-Oncogene Proteins c-bcl-2/genetics/metabolism ; Receptors, Cytoplasmic and Nuclear/genetics/*physiology ; *Receptors, Retinoic Acid ; *Receptors, Thyroid Hormone ; *Repressor Proteins ; T-Lymphocyte Subsets/*cytology ; Thymus Gland/*cytology ; *Transcription Factors ; bcl-X Protein
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    Subgroup of reproductive functions of progesterone mediated by progesterone receptor-B isoform (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-09-08
    Description: Progesterone regulates reproductive function through two intracellular receptors, progesterone receptor-A (PR-A) and progesterone receptor-B (PR-B), that arise from a single gene and function as transcriptional regulators of progesterone-responsive genes. Although in vitro studies show that PR isoforms can display different transcriptional regulatory activities, their physiological significance is unknown. By selective ablation of PR-A in mice, we show that the PR-B isoform modulates a subset of reproductive functions of progesterone by regulation of a subset of progesterone-responsive target genes. Thus, PR-A and PR-B are functionally distinct mediators of progesterone action in vivo and should provide suitable targets for generation of tissue-selective progestins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mulac-Jericevic, B -- Mullinax, R A -- DeMayo, F J -- Lydon, J P -- Conneely, O M -- HD32007/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2000 Sep 8;289(5485):1751-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Biology, 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/10976068" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division/drug effects ; Crosses, Genetic ; *Embryo Implantation ; Epithelial Cells/cytology/drug effects ; Epithelium/drug effects/metabolism ; Estradiol/pharmacology ; Female ; Gene Expression Regulation ; Male ; Mammary Glands, Animal/cytology/drug effects ; Mice ; Mice, Knockout ; Ovariectomy ; Ovulation ; Progesterone/pharmacology/*physiology ; Protein Isoforms ; Receptors, Progesterone/genetics/*physiology ; *Reproduction ; Uterus/cytology/drug effects/metabolism/*physiology
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    Activating mineralocorticoid receptor mutation in hypertension exacerbated by pregnancy (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-07
    Description: Hypertension and pregnancy-related hypertension are major public health problems of largely unknown causes. We describe a mutation in the mineralocorticoid receptor (MR), S810L, that causes early-onset hypertension that is markedly exacerbated in pregnancy. This mutation results in constitutive MR activity and alters receptor specificity, with progesterone and other steroids lacking 21-hydroxyl groups, normally MR antagonists, becoming potent agonists. Structural and biochemical studies indicate that the mutation results in the gain of a van der Waals interaction between helix 5 and helix 3 that substitutes for interaction of the steroid 21-hydroxyl group with helix 3 in the wild-type receptor. This helix 5-helix 3 interaction is highly conserved among diverse nuclear hormone receptors, suggesting its general role in receptor activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Geller, D S -- Farhi, A -- Pinkerton, N -- Fradley, M -- Moritz, M -- Spitzer, A -- Meinke, G -- Tsai, F T -- Sigler, P B -- Lifton, R P -- New York, N.Y. -- Science. 2000 Jul 7;289(5476):119-23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Genetics, Yale University School of Medicine, Boyer Center for Molecular Medicine, Room 154, 295 Congress Avenue, New Haven, CT 06510, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10884226" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Aldosterone/*metabolism ; Amino Acid Sequence ; Amino Acid Substitution ; Base Sequence ; Binding, Competitive ; Dimerization ; Female ; Heterozygote ; Humans ; Hypertension/etiology/*genetics/metabolism ; Male ; Models, Molecular ; Molecular Sequence Data ; Pedigree ; Point Mutation ; Pregnancy ; *Pregnancy Complications, Cardiovascular/etiology/metabolism ; Progesterone/*metabolism ; Protein Conformation ; Protein Structure, Secondary ; Receptors, Mineralocorticoid/chemistry/*genetics/*metabolism ; Receptors, Steroid/chemistry/metabolism ; Steroids/metabolism
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    Protection against cutaneous leishmaniasis resulting from bites of uninfected sand flies (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-11-18
    Description: Despite the fact that Leishmania are transmitted exclusively by sand flies, none of the experimental models of leishmaniasis have established infection via sand fly bites. Here we describe a reproducible murine model of Leishmania major infection transmitted by Phlebotomus papatasi. Prior exposure of mice to bites of uninfected sand flies conferred powerful protection against Leishmania major that was associated with a strong delayed-type hypersensitivity response and with interferon-gamma production at the site of parasite delivery. These results have important implications for the epidemiology of cutaneous leishmaniasis and suggest a vaccination strategy against this and possibly other vector-borne diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kamhawi, S -- Belkaid, Y -- Modi, G -- Rowton, E -- Sacks, D -- New York, N.Y. -- Science. 2000 Nov 17;290(5495):1351-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11082061" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dermis/immunology/parasitology ; Disease Models, Animal ; Ear ; Epidermis/immunology/parasitology ; Female ; Humans ; Hypersensitivity, Delayed ; *Insect Bites and Stings ; *Insect Vectors/parasitology ; Interferon-gamma/biosynthesis ; Interleukins/biosynthesis ; *Leishmania major/physiology ; Leishmaniasis, Cutaneous/*immunology/parasitology/*transmission ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; *Phlebotomus/parasitology ; Saliva/immunology
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    Major international AIDS research collaborations (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-15
    Description: Science lists the major collaborative research projects throughout sub-Saharan Africa. This list will be updated periodically at www.sciencemag.org/feature/data/africacollaborations.shl. Please send additions and changes to science_news@aaas.org.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 2000 Jun 23;288(5474):2156-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10896595" target="_blank"〉PubMed〈/a〉
    Keywords: *Acquired Immunodeficiency Syndrome ; Africa South of the Sahara ; Female ; Humans ; *International Cooperation ; Male ; *Research
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Mitotic misregulation and human aging (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-31
    Description: Messenger RNA levels were measured in actively dividing fibroblasts isolated from young, middle-age, and old-age humans and humans with progeria, a rare genetic disorder characterized by accelerated aging. Genes whose expression is associated with age-related phenotypes and diseases were identified. The data also suggest that an underlying mechanism of the aging process involves increasing errors in the mitotic machinery of dividing cells in the postreproductive stage of life. We propose that this dysfunction leads to chromosomal pathologies that result in misregulation of genes involved in the aging process.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ly, D H -- Lockhart, D J -- Lerner, R A -- Schultz, P G -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2486-92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and the Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10741968" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Aged, 80 and over ; Aging/*genetics/pathology ; Biochemical Phenomena ; Cell Division ; Cell Line ; Cell Nucleus/ultrastructure ; Child ; Chromosome Segregation/genetics ; Disease/etiology ; Extracellular Matrix/metabolism ; Female ; Fibroblasts/cytology/*metabolism ; *Gene Expression Profiling ; *Gene Expression Regulation ; Humans ; Male ; Middle Aged ; *Mitosis/genetics ; Mutation ; Oligonucleotide Array Sequence Analysis ; Phenotype ; Progeria/*genetics/pathology ; RNA, Messenger/genetics/metabolism ; Spindle Apparatus/metabolism ; Transcription Factors/genetics
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    Natural selection and parallel speciation in sympatric sticklebacks (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-15
    Description: Natural selection plays a fundamental role in most theories of speciation, but empirical evidence from the wild has been lacking. Here the post-Pleistocene radiation of threespine sticklebacks was used to infer natural selection in the origin of species. Populations of sticklebacks that evolved under different ecological conditions show strong reproductive isolation, whereas populations that evolved independently under similar ecological conditions lack isolation. Speciation has proceeded in this adaptive radiation in a repeatable fashion, ultimately as a consequence of adaptation to alternative environments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rundle, H D -- Nagel, L -- Wenrick Boughman, J -- Schluter, D -- New York, N.Y. -- Science. 2000 Jan 14;287(5451):306-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of British Columbia, 6270 University Boulevard, Vancouver, British Columbia V6T 1Z4 Canada. rundle@zoology.ubc.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10634785" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Animals ; *Biological Evolution ; British Columbia ; DNA, Mitochondrial/genetics ; Female ; Fishes/classification/*genetics/physiology ; Male ; Phylogeny ; Probability ; Reproduction ; *Selection, Genetic ; Sexual Behavior, Animal
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    Profile: McIntyre and Gray have a will and a way (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-15
    Description: At the Chris Hani Baragwanath Hospital here, where HIV infects more than 20% of the 17,000 pregnant women who give birth here each year, pediatrician Glenda Gray and obstetrician James McIntyre aggressively try to help HIV-infected pregnant women stop the virus from infecting their babies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 2000 Jun 23;288(5474):2163.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10896602" target="_blank"〉PubMed〈/a〉
    Keywords: Anti-HIV Agents/therapeutic use ; Female ; HIV Infections/diagnosis/drug therapy/prevention & control/*transmission ; History, 20th Century ; Humans ; *Infectious Disease Transmission, Vertical ; Pregnancy ; Pregnancy Complications, Infectious/diagnosis/*drug therapy ; South Africa
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    Profile. An ambassador of research (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-15
    Description: Elizabeth Ngugi, a nurse and social worker with a collaborative AIDS research program based at the University of Nairobi, plays a role that is crucial for many AIDS projects throughout Africa--but one that seldom receives credit in scientific circles. Like an ambassador of research, Ngugi connects ostracized communities that have little education and even less money to an international team of AIDS scientists.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 2000 Jun 23;288(5474):2162.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10896601" target="_blank"〉PubMed〈/a〉
    Keywords: *Acquired Immunodeficiency Syndrome/prevention & control/transmission ; Female ; History, 20th Century ; Humans ; International Cooperation ; Kenya ; Male ; Prostitution ; *Research
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    HIV transmission. AIDS researchers look to Africa for new insights (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-02-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, J -- New York, N.Y. -- Science. 2000 Feb 11;287(5455):942-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10691560" target="_blank"〉PubMed〈/a〉
    Keywords: AIDS Vaccines ; Adult ; Africa/epidemiology ; Africa South of the Sahara/epidemiology ; Breast Feeding ; Developing Countries ; Female ; HIV Infections/epidemiology/*prevention & control/*transmission ; Humans ; Infant ; Male ; Prevalence ; Sexual Behavior
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    Coding the location of the arm by sight (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-12-02
    Description: Area 5 in the parietal lobe of the primate brain is thought to be involved in monitoring the posture and movement of the body. In this study, neurons in monkey area 5 were found to encode the position of the monkey's arm while it was covered from view. The same neurons also responded to the position of a visible, realistic false arm. The neurons were not sensitive to the sight of unrealistic substitutes for the arm and were able to distinguish a right from a left arm. These neurons appear to combine visual and somatosensory signals in order to monitor the configuration of the limbs. They could form the basis of the complex body schema that we constantly use to adjust posture and guide movement.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Graziano, M S -- Cooke, D F -- Taylor, C S -- 11347/PHS HHS/ -- New York, N.Y. -- Science. 2000 Dec 1;290(5497):1782-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, Princeton University, Princeton, NJ 08544, USA. graziano@princeton.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11099420" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arm ; *Body Image ; Cues ; Humans ; Macaca fascicularis ; Male ; Neural Pathways ; Neurons/*physiology ; Parietal Lobe/cytology/*physiology ; *Proprioception ; *Visual Perception
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    Role of adenine nucleotide translocator 1 in mtDNA maintenance (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-05
    Description: Autosomal dominant progressive external ophthalmoplegia is a rare human disease that shows a Mendelian inheritance pattern, but is characterized by large-scale mitochondrial DNA (mtDNA) deletions. We have identified two heterozygous missense mutations in the nuclear gene encoding the heart/skeletal muscle isoform of the adenine nucleotide translocator (ANT1) in five families and one sporadic patient. The familial mutation substitutes a proline for a highly conserved alanine at position 114 in the ANT1 protein. The analogous mutation in yeast caused a respiratory defect. These results indicate that ANT has a role in mtDNA maintenance and that a mitochondrial disease can be caused by a dominant mechanism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaukonen, J -- Juselius, J K -- Tiranti, V -- Kyttala, A -- Zeviani, M -- Comi, G P -- Keranen, S -- Peltonen, L -- Suomalainen, A -- 1180/Telethon/Italy -- New York, N.Y. -- Science. 2000 Aug 4;289(5480):782-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Public Health Institute, Department of Human Molecular Genetics, Mannerheimintie 166, 00300 Helsinki, Finland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10926541" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Animals ; DNA, Mitochondrial/*genetics/*metabolism ; Female ; Founder Effect ; Genes, Dominant ; Humans ; Isoenzymes/chemistry/genetics/metabolism ; Italy ; Male ; Mitochondrial ADP, ATP Translocases/chemistry/*genetics/*metabolism ; Molecular Sequence Data ; Mutation, Missense ; Ophthalmoplegia, Chronic Progressive External/enzymology/*genetics ; Oxygen Consumption ; Pedigree ; Point Mutation ; Saccharomyces cerevisiae/enzymology/genetics/metabolism ; Sequence Deletion ; Transformation, Genetic
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    Cell biology. A universal bicarbonate sensor (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-08-12
    Description: The life-span of sperm may be short but it is certainly busy. The three principal molecular events that prepare sperm for fertilization are all controlled by the intracellular nucleotide adenosine 3',5'-monophosphate (cAMP). One of these, capacitation, is also regulated by bicarbonate ions. The elusive connection between cAMP and bicarbonate ions now appears to be solved as Kaupp and Weyand explain in their Perspective. Bicarbonate ions enter sperm through the anion transporter in the sperm plasma membrane and activate the soluble form of adenylyl cyclase, the enzyme that synthesizes cAMP (Chen et al.)〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaupp, U B -- Weyand, I -- New York, N.Y. -- Science. 2000 Jul 28;289(5479):559-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biologische Informationsverarbeitung, Forschungszentrum Jlich, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10939966" target="_blank"〉PubMed〈/a〉
    Keywords: Adenylyl Cyclases/chemistry/*metabolism ; Animals ; Bicarbonates/*metabolism/pharmacology ; Calcium Channels/metabolism ; Catalytic Domain ; Cyclic AMP/*metabolism ; Cyclic Nucleotide-Gated Cation Channels ; Enzyme Activation ; Humans ; Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels ; Ion Channels/metabolism ; Male ; Molecular Weight ; *Muscle Proteins ; Potassium Channels ; Rats ; Signal Transduction ; Solubility ; *Sperm Capacitation ; Sperm Motility ; Sperm Tail/physiology ; Spermatozoa/metabolism/*physiology
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    HIV and Africa's future (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-07-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Norman, C -- New York, N.Y. -- Science. 2000 Jun 23;288(5474):2149.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10896591" target="_blank"〉PubMed〈/a〉
    Keywords: *Acquired Immunodeficiency Syndrome/epidemiology/therapy/transmission ; Africa ; Female ; *HIV Infections/epidemiology/therapy/transmission/virology ; Humans ; International Cooperation ; Male ; Research
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    Deleterious mutations and the evolution of sex (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-10-13
    Description: It has been suggested that sexual reproduction is maintained because it reduces the load imposed by recurrent deleterious mutations. If rates of deleterious mutation per diploid genome per generation (U) exceed 1, and mutations interact synergistically, then sexuals can overcome their inherent twofold disadvantage. We have tested this hypothesis by estimating genomic point mutation rates for protein-coding genes in a range of animal taxa. We find a positive linear relationship between U and generation time. In species with short generation times, U is predicted to be far below 1, suggesting that sex is not maintained by its capacity to purge the genome of deleterious mutations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Keightley, P D -- Eyre-Walker, A -- New York, N.Y. -- Science. 2000 Oct 13;290(5490):331-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Cell, Animal and Population Biology, University of Edinburgh, West Mains Road, Edinburgh EH9 3JT, UK. p.keightley@ed.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11030650" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Birds/genetics/physiology ; Cats/genetics/physiology ; Cattle/genetics/physiology ; DNA Transposable Elements ; Dogs/genetics/physiology ; Drosophila/genetics/physiology ; Female ; Haplorhini/genetics/physiology ; Humans ; Male ; Mutation ; *Point Mutation ; Proteins/genetics ; Rodentia/genetics/physiology ; *Sex ; Sheep/genetics/physiology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Genetic requirements for inheritance of RNAi in C. elegans (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-03-31
    Description: In Caenorhabditis elegans, the introduction of double-stranded RNA triggers sequence-specific genetic interference (RNAi) that is transmitted to offspring. The inheritance properties associated with this phenomenon were examined. Transmission of the interference effect occurred through a dominant extragenic agent. The wild-type activities of the RNAi pathway genes rde-1 and rde-4 were required for the formation of this interfering agent but were not needed for interference thereafter. In contrast, the rde-2 and mut-7 genes were required downstream for interference. These findings provide evidence for germ line transmission of an extragenic sequence-specific silencing factor and implicate rde-1 and rde-4 in the formation of the inherited agent.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grishok, A -- Tabara, H -- Mello, C C -- GM58800/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Mar 31;287(5462):2494-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Program in Molecular Medicine, Department of Cell Biology, University of Massachusetts Cancer Center, Two Biotech Suite 213, 373 Plantation Street, Worcester, MA 01605, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10741970" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/*genetics/physiology ; *Caenorhabditis elegans Proteins ; Crosses, Genetic ; DNA Transposable Elements ; Disorders of Sex Development ; Female ; *Gene Silencing ; *Genes, Helminth ; Helminth Proteins/genetics/physiology ; Male ; Mutation ; Phenotype ; RNA, Double-Stranded/*genetics ; RNA, Helminth/*genetics
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    Early development of ocular dominance columns (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-11-18
    Description: The segregation of lateral geniculate nucleus (LGN) axons into ocular dominance columns is believed to involve a prolonged, activity-dependent sorting process. However, visualization of early postnatal ferret LGN axons by direct LGN tracer injections revealed segregated ocular dominance columns 〈7 days after innervation of layer 4. These early columns were unaffected by experimentally induced imbalances in retinal activity, implying that different mechanisms govern initial column formation and their modification during the subsequent critical period. Instead of activity-dependent plasticity, we propose that ocular dominance column formation relies on the targeting of distinct axonal populations to defined locales in cortical layer 4.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Crowley, J C -- Katz, L C -- EY07690/EY/NEI NIH HHS/ -- MH12359/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2000 Nov 17;290(5495):1321-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Neurobiology, Duke University Medical Center, Durham, NC 27710, USA. jcrowley@neuro.duke.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11082053" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Axons/*physiology ; Female ; Ferrets ; Geniculate Bodies/cytology/*physiology ; Male ; Neurons, Afferent/physiology ; Photic Stimulation ; Retina/physiology ; Sensory Deprivation ; Vision, Ocular ; Visual Cortex/cytology/*growth & development/physiology ; Visual Pathways/growth & development/*physiology ; *Visual Perception
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    Gamma oscillations and object processing in the infant brain (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-11-25
    Description: An enduring controversy in neuroscience concerns how the brain "binds" together separately coded stimulus features to form unitary representations of objects. Recent evidence has indicated a close link between this binding process and 40-hertz (gamma-band) oscillations generated by localized neural circuits. In a separate line of research, the ability of young infants to perceive objects as unitary and bounded has become a central focus for debates about the mechanisms of perceptual development. Here we demonstrate that binding-related 40-hertz oscillations are evident in the infant brain around 8 months of age, which is the same age at which behavioral and event-related potential evidence indicates the onset of perceptual binding of spatially separated static visual features.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Csibra, G -- Davis, G -- Spratling, M W -- Johnson, M H -- New York, N.Y. -- Science. 2000 Nov 24;290(5496):1582-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Brain and Cognitive Development, School of Psychology, Birkbeck College, University of London, Malet Street, London WC1E 7HX, UK. g.csibra@bbk.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11090357" target="_blank"〉PubMed〈/a〉
    Keywords: *Electroencephalography ; Evoked Potentials, Visual ; Female ; *Form Perception ; Frontal Lobe/*physiology ; Humans ; Infant ; Male ; Occipital Lobe/physiology ; Parietal Lobe/physiology
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    Alternative views on alternative medicine (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Curry, E P -- New York, N.Y. -- Science. 2000 Jul 14;289(5477):245-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10917846" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Asphyxia/etiology ; Breast Neoplasms/therapy ; Child ; *Complementary Therapies ; Female ; Humans ; Medical Errors/adverse effects
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  • 90
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    Animal behavior. Dolphins whistle a signature tune (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-09-09
    Description: Dolphins are remarkably intelligent creatures renowned for their ability to imitate manmade sounds and for producing individual signature whistles that enable them to recognize each other. Now, in his Perspective, Tyack discusses new findings showing that vocal imitation is important for communication among bottlenose dolphins in the wild (Janik). Apparently, bottlenose dolphins, when they are separated in the wild, address each other by matching each other's whistles.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tyack, P L -- New York, N.Y. -- Science. 2000 Aug 25;289(5483):1310-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA. ptyack@whoi.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10979857" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Wild/physiology ; Biological Evolution ; Brain/anatomy & histology/physiology ; Dolphins/*physiology ; Female ; *Imitative Behavior ; Intelligence ; *Learning ; Male ; *Social Behavior ; *Vocalization, Animal
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    Economics. Does science drive the productivity train? (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-09-09
    Description: From the president on down, many are hailing science as the fuel for today's booming economy, and bigger research budgets are seen as essential to continued prosperity. But skeptics say the information technology revolution is overrated as a contributor to economic growth when compared to the truly society-shaking innovations of the past, such as electricity or the telephone. Even some science lobbyists worry that hitching basic research's star too closely to economic arguments could backfire, prompting legislators to take a firmer hand in guiding cash toward less risky projects that they believe will pay off big.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Malakoff, D -- New York, N.Y. -- Science. 2000 Aug 25;289(5483):1274-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10979847" target="_blank"〉PubMed〈/a〉
    Keywords: Computers ; *Economics/statistics & numerical data ; Female ; *Health ; Humans ; Male ; Politics ; *Quality of Life ; Research/*economics/statistics & numerical data ; Research Support as Topic ; Science/*economics/statistics & numerical data ; United States
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    AIDS in a new millennium (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-08-06
    Description: As we enter the new millennium the world is still facing the challenge of responding to the AIDS pandemic. A new report from the Joint United Nations Programme on HIV/AIDS presents the latest statistics on prevalence, spread, and impact of the disease. In their Perspective, Schwartlander and his colleagues discuss the newly released statistics and the strategies needed to combat the further spread of HIV/AIDS and to reduce prevalence in the most severely affected countries.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwartlander, B -- Garnett, G -- Walker, N -- Anderson, R -- New York, N.Y. -- Science. 2000 Jul 7;289(5476):64-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉UNAIDS, 20 Avenue Appia, Geneva 27 CH-1211, Switzerland. schwartlanderb@unaids.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10928930" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/drug therapy/*epidemiology/prevention & ; control/transmission ; Anti-HIV Agents/therapeutic use ; *Disease Outbreaks ; Female ; *Global Health ; HIV Infections/drug therapy/*epidemiology/prevention & control/transmission ; Health Policy ; Humans ; Infectious Disease Transmission, Vertical ; Male ; Population Dynamics ; Prevalence ; Risk-Taking ; Sexual Behavior ; United Nations
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    Biomedicine. Staying slim with insulin in mind (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-10-14
    Description: Striking the delicate balance between energy intake in the form of food and energy expenditure in the form of metabolic activity keeps the body extremely busy. As Schwartz explains in his enlightening Perspective, the finding that insulin signals the brain to promote weight loss (Bruning et al.) flies in the face of the notion that insulin is involved solely in glucose storage, its conversion to fat, and weight gain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schwartz, M W -- New York, N.Y. -- Science. 2000 Sep 22;289(5487):2066-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Metabolism, Endocrinology and Nutrition, University of Washington, Seattle, WA 98105, USA. mschwart@u.washington.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11032558" target="_blank"〉PubMed〈/a〉
    Keywords: Adipocytes/physiology ; Animals ; Blood Glucose/analysis ; *Body Weight ; Brain/*physiology ; Eating ; Female ; Insulin/*physiology ; Leptin/physiology ; Male ; Mice ; Neurons/physiology ; Obesity/etiology ; Receptor, Insulin/*physiology ; Signal Transduction ; Weight Loss
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    Embryos attacked by mom's natural defenses (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-02-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hagmann, M -- New York, N.Y. -- Science. 2000 Jan 21;287(5452):408.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10671158" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Complement Activation ; Complement System Proteins/*immunology ; Embryo, Mammalian/*immunology ; Female ; Humans ; *Immune Tolerance ; Immunity, Innate ; Mice ; Mice, Knockout ; Pregnancy ; Receptors, Complement/genetics/*physiology ; Trophoblasts/immunology
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    The genetic legacy of Paleolithic Homo sapiens sapiens in extant Europeans: a Y chromosome perspective (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-11-10
    Description: A genetic perspective of human history in Europe was derived from 22 binary markers of the nonrecombining Y chromosome (NRY). Ten lineages account for 〉95% of the 1007 European Y chromosomes studied. Geographic distribution and age estimates of alleles are compatible with two Paleolithic and one Neolithic migratory episode that have contributed to the modern European gene pool. A significant correlation between the NRY haplotype data and principal components based on 95 protein markers was observed, indicating the effectiveness of NRY binary polymorphisms in the characterization of human population composition and history.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Semino, O -- Passarino, G -- Oefner, P J -- Lin, A A -- Arbuzova, S -- Beckman, L E -- De Benedictis, G -- Francalacci, P -- Kouvatsi, A -- Limborska, S -- Marcikiae, M -- Mika, A -- Mika, B -- Primorac, D -- Santachiara-Benerecetti, A S -- Cavalli-Sforza, L L -- Underhill, P A -- GM 28428/GM/NIGMS NIH HHS/ -- GM 55273/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2000 Nov 10;290(5494):1155-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dipartimento di Genetica e Microbiologia, Universita di Pavia, Via Ferrata 1, 27100 Pavia, Italy. semino@ipvgen.univp.it〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11073453" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Anthropology, Physical ; Climate ; DNA, Mitochondrial/genetics ; Emigration and Immigration ; Europe ; Female ; *Gene Pool ; Genetic Markers ; *Genetics, Population ; History, Ancient ; Humans ; Male ; Middle East ; *Y Chromosome
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    An inherited functional circadian clock in zebrafish embryos (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-07-15
    Description: Circadian clocks are time-keeping systems found in most organisms. In zebrafish, expression of the clock gene Period3 (Per3) oscillates throughout embryogenesis in the central nervous system and the retina. Per3 rhythmic expression was free-running and was reset by light but not by the developmental delays caused by low temperature. The time of fertilization had no effect on Per3 expression. Per3 messenger RNA accumulates rhythmically in oocytes and persists in embryos. Our results establish that the circadian clock functions during early embryogenesis in zebrafish. Inheritance of maternal clock gene products suggests a mechanism of phase inheritance through ovogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Delaunay, F -- Thisse, C -- Marchand, O -- Laudet, V -- Thisse, B -- New York, N.Y. -- Science. 2000 Jul 14;289(5477):297-300.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ecole Normale Superieure, CNRS UMR 5665, 46 allee d'Italie, 69364 Lyon Cedex, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10894777" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; *Circadian Rhythm/genetics ; *DNA-Binding Proteins ; Embryo, Nonmammalian/metabolism ; Embryonic Development ; Female ; Gene Expression Regulation, Developmental ; Light ; Molecular Sequence Data ; Nuclear Proteins/*genetics/physiology ; Period Circadian Proteins ; Proteins/genetics ; *Receptors, Cytoplasmic and Nuclear ; Transcription Factors ; Zebrafish/embryology/*physiology ; Zebrafish Proteins
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    A delayed wave of death from reproduction in Drosophila (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-01-05
    Description: Mortality rates typically increase rapidly at the onset of aging but can decelerate at later ages. Reproduction increases the death rate in many organisms. To test the idea that a delayed impact of earlier reproduction contributes to both an increase in death rates and a later deceleration in mortality, the timing of the surplus mortality produced by an increased level of egg production was measured in female Drosophila. Reproduction produced a delayed wave of mortality, coincident with the sharp increase in death rates at the onset of aging and the subsequent deceleration of mortality. These results suggest that aging has evolved primarily because of the damaging effects of reproduction earlier in life, rather than because of mutations that have detrimental effects only at late ages.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sgro, C M -- Partridge, L -- New York, N.Y. -- Science. 1999 Dec 24;286(5449):2521-4.〈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/10617470" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging/genetics/physiology ; Animals ; *Biological Evolution ; Crosses, Genetic ; DNA-Binding Proteins/genetics/metabolism ; *Drosophila Proteins ; Drosophila melanogaster/genetics/physiology/radiation effects ; Female ; Fertility/physiology ; Genes, Insect ; Hybridization, Genetic ; *Longevity/genetics/physiology ; Male ; Oviposition ; *Reproduction/genetics/physiology ; Selection, Genetic ; Transcription Factors/genetics/metabolism
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    Human genetics. mtDNA shows signs of paternal influence (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Strauss, E -- New York, N.Y. -- Science. 1999 Dec 24;286(5449):2436.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10636798" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA, Mitochondrial/*genetics ; *Evolution, Molecular ; Fathers ; Female ; Humans ; Linkage Disequilibrium ; Male ; Mothers ; Pan troglodytes/genetics ; *Recombination, Genetic
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    Neurodegeneration prevented by lentiviral vector delivery of GDNF in primate models of Parkinson's disease (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-10-29
    Description: Lentiviral delivery of glial cell line-derived neurotrophic factor (lenti-GDNF) was tested for its trophic effects upon degenerating nigrostriatal neurons in nonhuman primate models of Parkinson's disease (PD). We injected lenti-GDNF into the striatum and substantia nigra of nonlesioned aged rhesus monkeys or young adult rhesus monkeys treated 1 week prior with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). Extensive GDNF expression with anterograde and retrograde transport was seen in all animals. In aged monkeys, lenti-GDNF augmented dopaminergic function. In MPTP-treated monkeys, lenti-GDNF reversed functional deficits and completely prevented nigrostriatal degeneration. Additionally, lenti-GDNF injections to intact rhesus monkeys revealed long-term gene expression (8 months). In MPTP-treated monkeys, lenti-GDNF treatment reversed motor deficits in a hand-reach task. These data indicate that GDNF delivery using a lentiviral vector system can prevent nigrostriatal degeneration and induce regeneration in primate models of PD and might be a viable therapeutic strategy for PD patients.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kordower, J H -- Emborg, M E -- Bloch, J -- Ma, S Y -- Chu, Y -- Leventhal, L -- McBride, J -- Chen, E Y -- Palfi, S -- Roitberg, B Z -- Brown, W D -- Holden, J E -- Pyzalski, R -- Taylor, M D -- Carvey, P -- Ling, Z -- Trono, D -- Hantraye, P -- Deglon, N -- Aebischer, P -- NS40578/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2000 Oct 27;290(5492):767-73.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurological Sciences, Rush Presbyterian-St. Luke's Medical Center, Chicago, IL 60612, USA. jkordowe@rush.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11052933" target="_blank"〉PubMed〈/a〉
    Keywords: 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine ; Aging ; Animals ; Antigens, CD/analysis ; Dihydroxyphenylalanine/*analogs & derivatives/metabolism ; Disease Models, Animal ; Dopamine/*metabolism ; Female ; Gene Expression ; *Genetic Therapy ; Genetic Vectors ; Glial Cell Line-Derived Neurotrophic Factor ; Lentivirus/genetics ; Macaca mulatta ; Neostriatum/metabolism/pathology ; Nerve Degeneration/*prevention & control ; *Nerve Growth Factors ; Nerve Tissue Proteins/*genetics/metabolism/therapeutic use ; Neurons/enzymology ; Parkinson Disease/metabolism/pathology/physiopathology/*therapy ; Parkinsonian Disorders/metabolism/pathology/physiopathology/therapy ; Psychomotor Performance ; Substantia Nigra/metabolism/pathology ; Tyrosine 3-Monooxygenase/metabolism
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    Kinesin superfamily motor protein KIF17 and mLin-10 in NMDA receptor-containing vesicle transport (2000)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2000-06-10
    Description: Experiments with vesicles containing N-methyl-D-aspartate (NMDA) receptor 2B (NR2B subunit) show that they are transported along microtubules by KIF17, a neuron-specific molecular motor in neuronal dendrites. Selective transport is accomplished by direct interaction of the KIF17 tail with a PDZ domain of mLin-10 (Mint1/X11), which is a constituent of a large protein complex including mLin-2 (CASK), mLin-7 (MALS/Velis), and the NR2B subunit. This interaction, specific for a neurotransmitter receptor critically important for plasticity in the postsynaptic terminal, may be a regulatory point for synaptic plasticity and neuronal morphogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Setou, M -- Nakagawa, T -- Seog, D H -- Hirokawa, N -- New York, N.Y. -- Science. 2000 Jun 9;288(5472):1796-802.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology and Anatomy, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10846156" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Binding Sites ; Biological Transport ; *Caenorhabditis elegans Proteins ; Cloning, Molecular ; Dendrites/*metabolism ; Dimerization ; Kinesin/chemistry/genetics/*metabolism ; Male ; *Membrane Proteins ; Mice ; Microtubules/metabolism ; Models, Biological ; Molecular Motor Proteins/chemistry/genetics/*metabolism ; Molecular Sequence Data ; Molecular Weight ; Organelles/metabolism ; Precipitin Tests ; Protein Binding ; Proteins/chemistry/*metabolism ; Receptors, N-Methyl-D-Aspartate/*metabolism ; Recombinant Proteins/chemistry/metabolism ; Two-Hybrid System Techniques
    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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