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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)
    Location Call Number Expected Availability
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    PAPER CURRENT
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