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  • Nature Publishing Group  (16)
  • American Association for the Advancement of Science (AAAS)  (4)
  • 2000-2004  (9)
  • 1970-1974  (11)
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Year
  • 1
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    Isolating "uncultivable" microorganisms in pure culture in a simulated natural environment (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-05-11
    Description: The majority (〉99%) of microorganisms from the environment resist cultivation in the laboratory. Ribosomal RNA analysis suggests that uncultivated organisms are found in nearly every prokaryotic group, and several divisions have no known cultivable representatives. We designed a diffusion chamber that allowed the growth of previously uncultivated microorganisms in a simulated natural environment. Colonies of representative marine organisms were isolated in pure culture. These isolates did not grow on artificial media alone but formed colonies in the presence of other microorganisms. This observation may help explain the nature of microbial uncultivability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaeberlein, T -- Lewis, K -- Epstein, S S -- New York, N.Y. -- Science. 2002 May 10;296(5570):1127-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biology Department, Northeastern University, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12004133" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/classification/cytology/*growth & development/*isolation & purification ; *Bacteriological Techniques ; Colony Count, Microbial ; Culture Media ; DNA, Bacterial/analysis/genetics ; DNA, Ribosomal/analysis/genetics ; Diffusion Chambers, Culture ; Geologic Sediments/*microbiology ; Molecular Sequence Data ; RNA, Ribosomal, 16S/genetics ; *Seawater ; Silicon Dioxide
    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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  • 2
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    A mutant Drosophila insulin receptor homolog that extends life-span and impairs neuroendocrine function (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-09
    Description: The Drosophila melanogaster gene insulin-like receptor (InR) is homologous to mammalian insulin receptors as well as to Caenorhabditis elegans daf-2, a signal transducer regulating worm dauer formation and adult longevity. We describe a heteroallelic, hypomorphic genotype of mutant InR, which yields dwarf females with up to an 85% extension of adult longevity and dwarf males with reduced late age-specific mortality. Treatment of the long-lived InR dwarfs with a juvenile hormone analog restores life expectancy toward that of wild-type controls. We conclude that juvenile hormone deficiency, which results from InR signal pathway mutation, is sufficient to extend life-span, and that in flies, insulin-like ligands nonautonomously mediate aging through retardation of growth or activation of specific endocrine tissue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tatar, M -- Kopelman, A -- Epstein, D -- Tu, M P -- Yin, C M -- Garofalo, R S -- R01 AG16632/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2001 Apr 6;292(5514):107-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Brown University, Providence, RI 02912, USA., University of Massachusetts, Amherst, MA 01003, USA. Marc_Tatar@Brown.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11292875" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/*physiology ; Alleles ; Animals ; Carrier Proteins/*genetics/*physiology ; Corpora Allata/*metabolism ; *Drosophila Proteins ; Drosophila melanogaster/genetics/*physiology ; Female ; Fertility ; Genes, Insect ; Genotype ; Insulin/pharmacology ; Juvenile Hormones/metabolism ; Longevity/*physiology ; Male ; Methoprene/pharmacology ; Mutation ; Protein-Tyrosine Kinases/*genetics/*physiology ; *Receptor Protein-Tyrosine Kinases ; Receptor, Insulin/genetics/physiology ; Reproduction ; Signal Transduction ; Superoxide Dismutase/metabolism ; Triglycerides/metabolism ; Vitellogenesis/drug effects
    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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  • 3
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    Inwardly rotating spiral waves in a reaction-diffusion system (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-10-27
    Description: Almost 30 years have passed since the discovery of concentric (target) and spiral waves in the spatially extended Belousov-Zhabotinsky (BZ) reaction. Since then, rotating spirals and target waves have been observed in a variety of physical, chemical, and biological reaction-diffusion systems. All of these waves propagate out from the spiral center or pacemaker. We report observations of inwardly rotating spirals found in the BZ system dispersed in water droplets of a water-in-oil microemulsion. These "antispirals" were also generated in computer simulations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vanag, V K -- Epstein, I R -- New York, N.Y. -- Science. 2001 Oct 26;294(5543):835-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Volen Center for Complex Systems, Brandeis University, Waltham, MA 02454, USA. vanag@brandeis.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11679665" target="_blank"〉PubMed〈/a〉
    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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    Role of the myosin assembly protein UNC-45 as a molecular chaperone for myosin (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-01-26
    Description: The organization of myosin into motile cellular structures requires precise temporal and spatial regulation. Proteins containing a UCS (UNC-45/CRO1/She4p) domain are necessary for the incorporation of myosin into the contractile ring during cytokinesis and into thick filaments during muscle development. We report that the carboxyl-terminal regions of UNC-45 bound and exerted chaperone activity on the myosin head. The amino-terminal tetratricopeptide repeat domain of UNC-45 bound the molecular chaperone Hsp90. Thus, UNC-45 functions both as a molecular chaperone and as an Hsp90 co-chaperone for myosin, which can explain previous findings of altered assembly and decreased accumulation of myosin in UNC-45 mutants of Caenorhabditis elegans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barral, Jose M -- Hutagalung, Alex H -- Brinker, Achim -- Hartl, F Ulrich -- Epstein, Henry F -- New York, N.Y. -- Science. 2002 Jan 25;295(5555):669-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11809970" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Binding Sites ; Caenorhabditis elegans/genetics/*metabolism ; Caenorhabditis elegans Proteins/chemistry/genetics/*metabolism ; Cell Line ; Cloning, Molecular ; HSP70 Heat-Shock Proteins/genetics/metabolism ; HSP90 Heat-Shock Proteins/genetics/metabolism ; Molecular Chaperones/chemistry/genetics/*metabolism ; Molecular Sequence Data ; Myosins/*metabolism ; Peptide Fragments/metabolism ; Protein Binding ; Protein Structure, Tertiary ; Recombinant Proteins/chemistry/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
    Electronic Resource
    Electronic Resource
    Nf1 has an essential role in endothelial cells (2003)
    [s.l.] : Nature Publishing Group
    Nature genetics 33 (2003), S. 75-79 
    Details
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Neurofibromatosis type 1 (NF1) or von Recklinghausen neurofibromatosis is a genetic disorder that occurs in 1 of 4000 births and is characterized by benign and malignant tumors. Cardiovascular defects also contribute to NF1, though the pathogenesis is still unclear. Deficiency in neurofibromin ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/ng1059
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  • 6
    Electronic Resource
    Electronic Resource
    Mouse model of Noonan syndrome reveals cell type– and gene dosage–dependent effects of Ptpn11 mutation (2004)
    [s.l.] : Nature Publishing Group
    Nature medicine 10 (2004), S. 849-857 
    Details
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Noonan syndrome is a common human autosomal dominant birth defect, characterized by short stature, facial abnormalities, heart defects and possibly increased risk of leukemia. Mutations of Ptpn11 (also known as Shp2), which encodes the protein-tyrosine phosphatase Shp2, occur in ∼50% of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nm1084
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  • 7
    Electronic Resource
    Electronic Resource
    Identification of genes differentially expressed in breast cancer cells treated with tamoxifen, using microarray-based expression profiling (2001)
    [s.l.] : Nature Publishing Group
    Nature genetics 27 (2001), S. 67-67 
    Details
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Adjuvant tamoxifen therapy is effective in reducing the risk of recurrence and death in patients with estrogen-receptor-positive breast cancer. However, the development of acquired resistance to tamoxifen limits its clinical effectiveness. To determine the effects of tamoxifen on breast cancer ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/87170
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  • 8
    Electronic Resource
    Electronic Resource
    Cyclic Nucleotides as Intracellular Mediators of the Expression of Antigen-sensitive Cells (1973)
    [s.l.] : Nature Publishing Group
    Nature 246 (1973), S. 405-409 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The interaction of antigen with antigen-sensitive cells can lead to antibody synthesis (induction) or can render these cells non-inducible (paralysis). Cyclic AMP may be the intracellular mediator of a paralytic signal whereas both cyclic AMP and cyclic GMP may be required as mediators of an ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/246405a0
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  • 9
    Electronic Resource
    Electronic Resource
    An Experiment in Education (1972)
    [s.l.] : Nature Publishing Group
    Nature 235 (1972), S. 203-205 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Professor Epstein discusses new approaches to the problems of established teaching methods. He describes a technique of teaching in which research papers are studied in class with a view to finding out what a scientist does and how he ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/235203a0
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  • 10
    Electronic Resource
    Electronic Resource
    Nitrosamines as Environmental Carcinogens (1970)
    [s.l.] : Nature Publishing Group
    Nature 225 (1970), S. 21-23 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Human cancer might be caused by nitrosamines formed in the body from ingested nitrites and secondary amines. Cooking could be a source of secondary ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/225021a0
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