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  • Signal Transduction  (109)
  • American Association for the Advancement of Science (AAAS)  (109)
  • Nature Publishing Group
  • Springer Science + Business Media
  • 2000-2004  (109)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (109)
  • Nature Publishing Group
  • Springer Science + Business Media
Years
Year
  • 1
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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
    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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    Role of Raf in vascular protection from distinct apoptotic stimuli (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-07-05
    Description: Raf kinases have been linked to endothelial cell survival. Here, we show that basic fibroblast growth factor (bFGF) and vascular endothelial growth factor (VEGF) differentially activate Raf, resulting in protection from distinct pathways of apoptosis in human endothelial cells and chick embryo vasculature. bFGF activated Raf-1 via p21-activated protein kinase-1 (PAK-1) phosphorylation of serines 338 and 339, resulting in Raf-1 mitochondrial translocation and endothelial cell protection from the intrinsic pathway of apoptosis, independent of the mitogen-activated protein kinase kinase-1 (MEK1). In contrast, VEGF activated Raf-1 via Src kinase, leading to phosphorylation of tyrosines 340 and 341 and MEK1-dependent protection from extrinsic-mediated apoptosis. These findings implicate Raf-1 as a pivotal regulator of endothelial cell survival during angiogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alavi, Alireza -- Hood, John D -- Frausto, Ricardo -- Stupack, Dwayne G -- Cheresh, David A -- CA45726/CA/NCI NIH HHS/ -- CA50286/CA/NCI NIH HHS/ -- CA75924/CA/NCI NIH HHS/ -- P01 CA78045/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2003 Jul 4;301(5629):94-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, 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/12843393" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Apoptosis ; Cell Survival ; Cells, Cultured ; Chick Embryo ; Endothelial Growth Factors/pharmacology ; Endothelium, Vascular/*cytology/drug effects ; Enzyme Activation ; Enzyme Inhibitors/pharmacology ; Fibroblast Growth Factor 2/pharmacology ; Flavonoids/pharmacology ; Humans ; Intercellular Signaling Peptides and Proteins/pharmacology ; Lymphokines/pharmacology ; MAP Kinase Kinase 1 ; Mitochondria/metabolism ; Mitogen-Activated Protein Kinase 1/metabolism ; Mitogen-Activated Protein Kinase 3 ; Mitogen-Activated Protein Kinase Kinases/antagonists & inhibitors/metabolism ; Mitogen-Activated Protein Kinases/metabolism ; Neovascularization, Pathologic ; *Neovascularization, Physiologic/drug effects ; Phosphorylation ; Point Mutation ; Protein Transport ; Protein-Serine-Threonine Kinases/antagonists & inhibitors/metabolism ; Proto-Oncogene Proteins B-raf ; Proto-Oncogene Proteins c-raf/chemistry/genetics/*metabolism ; Signal Transduction ; Umbilical Veins ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors ; p21-Activated Kinases ; src-Family Kinases/antagonists & inhibitors/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Defective lymphotoxin-beta receptor-induced NF-kappaB transcriptional activity in NIK-deficient mice (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-17
    Description: The role of NF-kappaB-inducing kinase (NIK) in cytokine signaling remains controversial. To identify the physiologic functions of NIK, we disrupted the NIK locus by gene targeting. Although NIK-/- mice displayed abnormalities in both lymphoid tissue development and antibody responses, NIK-/- cells manifested normal NF-kappaB DNA binding activity when treated with a variety of cytokines, including tumor necrosis factor (TNF), interleukin-1 (IL-1), and lymphotoxin-beta (LTbeta). However, NIK was selectively required for gene transcription induced through ligation of LTbeta receptor but not TNF receptors. These results reveal that NIK regulates the transcriptional activity of NF-kappaB in a receptor-restricted manner.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yin, L -- Wu, L -- Wesche, H -- Arthur, C D -- White, J M -- Goeddel, D V -- Schreiber, R D -- New York, N.Y. -- Science. 2001 Mar 16;291(5511):2162-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Immunology, Department of Pathology and Immunology, 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/11251123" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal ; B-Lymphocytes/metabolism ; Cells, Cultured ; DNA/metabolism ; Fibroblasts/metabolism ; Gene Targeting ; Genes, Reporter ; Interleukin-1/metabolism/pharmacology ; Ligands ; Lymphoid Tissue/abnormalities ; Lymphotoxin beta Receptor ; Mice ; Mice, Inbred C57BL ; NF-kappa B/genetics/*metabolism ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Receptors, Tumor Necrosis Factor/immunology/*metabolism ; Signal Transduction ; *Transcription, Genetic ; Tumor Necrosis Factor-alpha/metabolism/pharmacology
    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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  • 4
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    Two-state allosteric behavior in a single-domain signaling protein (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-27
    Description: Protein actions are usually discussed in terms of static structures, but function requires motion. We find a strong correlation between phosphorylation-driven activation of the signaling protein NtrC and microsecond time-scale backbone dynamics. Using nuclear magnetic resonance relaxation, we characterized the motions of NtrC in three functional states: unphosphorylated (inactive), phosphorylated (active), and a partially active mutant. These dynamics are indicative of exchange between inactive and active conformations. Both states are populated in unphosphorylated NtrC, and phosphorylation shifts the equilibrium toward the active species. These results support a dynamic population shift between two preexisting conformations as the underlying mechanism of activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Volkman, B F -- Lipson, D -- Wemmer, D E -- Kern, D -- GM62117/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Mar 23;291(5512):2429-33.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Magnetic Resonance Facility at Madison (NMRFAM), Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11264542" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; *Bacterial Proteins ; Binding Sites ; DNA-Binding Proteins/*chemistry/genetics/*metabolism ; Models, Molecular ; Motion ; Mutation ; Nuclear Magnetic Resonance, Biomolecular ; PII Nitrogen Regulatory Proteins ; Phosphorylation ; *Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Signal Transduction ; Time ; *Trans-Activators ; *Transcription Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Role of brain insulin receptor in control of body weight and reproduction (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-09-23
    Description: Insulin receptors (IRs) and insulin signaling proteins are widely distributed throughout the central nervous system (CNS). To study the physiological role of insulin signaling in the brain, we created mice with a neuron-specific disruption of the IR gene (NIRKO mice). Inactivation of the IR had no impact on brain development or neuronal survival. However, female NIRKO mice showed increased food intake, and both male and female mice developed diet-sensitive obesity with increases in body fat and plasma leptin levels, mild insulin resistance, elevated plasma insulin levels, and hypertriglyceridemia. NIRKO mice also exhibited impaired spermatogenesis and ovarian follicle maturation because of hypothalamic dysregulation of luteinizing hormone. Thus, IR signaling in the CNS plays an important role in regulation of energy disposal, fuel metabolism, and reproduction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bruning, J C -- Gautam, D -- Burks, D J -- Gillette, J -- Schubert, M -- Orban, P C -- Klein, R -- Krone, W -- Muller-Wieland, D -- Kahn, C R -- DK31036/DK/NIDDK NIH HHS/ -- DK55326-01A2/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2000 Sep 22;289(5487):2122-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Klinik II und Poliklinik fur Innere Medizin and Center of Molecular Medicine (ZMMK) der Universitat zu Koln, Joseph Stelzmann Strasse 9, 50931 Cologne, Germany. jens.bruening@uni-koeln.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11000114" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue ; Animals ; Blood Glucose/analysis ; *Body Weight ; Brain/*metabolism ; Eating ; Female ; Hypertriglyceridemia/etiology ; Insulin/blood/*physiology ; Insulin Resistance ; Leptin/blood ; Leuprolide/pharmacology ; Luteinizing Hormone/blood ; Male ; Mice ; Mice, Knockout ; Neurons/metabolism ; Obesity/etiology ; Ovarian Follicle/physiology ; Receptor, Insulin/genetics/*physiology ; *Reproduction ; Sex Characteristics ; Signal Transduction ; Spermatogenesis
    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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  • 6
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    Hematopoietic cell regulation by Rac1 and Rac2 guanosine triphosphatases (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-10-18
    Description: The Rho guanosine triphosphatases (GTPases) Rac1 and Rac2 are critical signaling regulators in mammalian cells. The deletion of both Rac1 and Rac2 murine alleles leads to a massive egress of hematopoietic stem/progenitor cells (HSC/Ps) into the blood from the marrow, whereas Rac1-/- but not Rac2-/- HSC/Ps fail to engraft in the bone marrow of irradiated recipient mice. In contrast, Rac2, but not Rac1, regulates superoxide production and directed migration in neutrophils, and in each cell type, the two GTPases play distinct roles in actin organization, cell survival, and proliferation. Thus, Rac1 and Rac2 regulate unique aspects of hematopoietic development and function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gu, Yi -- Filippi, Marie-Dominique -- Cancelas, Jose A -- Siefring, Jamie E -- Williams, Emily P -- Jasti, Aparna C -- Harris, Chad E -- Lee, Andrew W -- Prabhakar, Rethinasamy -- Atkinson, Simon J -- Kwiatkowski, David J -- Williams, David A -- DK62757/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2003 Oct 17;302(5644):445-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Experimental Hematology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14564009" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism ; Animals ; Apoptosis ; Bone Marrow Transplantation ; Cell Adhesion ; Cell Cycle ; Cell Movement ; Cell Size ; Colony-Forming Units Assay ; Cyclin D1/metabolism ; Fibronectins/metabolism ; Hematopoiesis ; Hematopoietic Stem Cell Mobilization ; Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells/*physiology ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Mitogen-Activated Protein Kinases/metabolism ; Neutrophils/*physiology ; *Protein-Serine-Threonine Kinases ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-akt ; Recombination, Genetic ; Signal Transduction ; Stem Cell Factor/pharmacology ; Superoxides/metabolism ; rac GTP-Binding Proteins/genetics/*metabolism ; rac1 GTP-Binding Protein/genetics/*metabolism
    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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  • 7
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    Semaphorin 3E and plexin-D1 control vascular pattern independently of neuropilins (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-11-20
    Description: The development of a patterned vasculature is essential for normal organogenesis. We found that signaling by semaphorin 3E (Sema3E) and its receptor plexin-D1 controls endothelial cell positioning and the patterning of the developing vasculature in the mouse. Sema3E is highly expressed in developing somites, where it acts as a repulsive cue for plexin-D1-expressing endothelial cells of adjacent intersomitic vessels. Sema3E-plexin-D1 signaling did not require neuropilins, which were previously presumed to be obligate Sema3 coreceptors. Moreover, genetic ablation of Sema3E or plexin-D1 but not neuropilin-mediated Sema3 signaling disrupted vascular patterning. These findings reveal an unexpected semaphorin signaling pathway and define a mechanism for controlling vascular patterning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gu, Chenghua -- Yoshida, Yutaka -- Livet, Jean -- Reimert, Dorothy V -- Mann, Fanny -- Merte, Janna -- Henderson, Christopher E -- Jessell, Thomas M -- Kolodkin, Alex L -- Ginty, David D -- CA23767-24/CA/NCI NIH HHS/ -- MH59199-06/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 2005 Jan 14;307(5707):265-8. Epub 2004 Nov 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205-2185, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15550623" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Blood Vessels/*embryology/metabolism ; Body Patterning ; COS Cells ; Cercopithecus aethiops ; Chick Embryo ; Endothelial Cells/cytology/physiology ; Endothelium, Vascular/cytology/embryology ; Glycoproteins/*metabolism ; In Situ Hybridization ; Ligands ; Membrane Glycoproteins/*metabolism ; Membrane Proteins/*metabolism ; Mice ; Morphogenesis ; Mutation ; Nerve Tissue Proteins/*metabolism ; Neuropilin-1/metabolism ; Neuropilin-2/metabolism ; Phenotype ; Protein Binding ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Somites/*metabolism ; Transfection
    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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  • 8
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    PDGFRA activating mutations in gastrointestinal stromal tumors (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-01-11
    Description: Most gastrointestinal stromal tumors (GISTs) have activating mutations in the KIT receptor tyrosine kinase, and most patients with GISTs respond well to Gleevec, which inhibits KIT kinase activity. Here we show that approximately 35% (14 of 40) of GISTs lacking KIT mutations have intragenic activation mutations in the related receptor tyrosine kinase, platelet-derived growth factor receptor alpha (PDGFRA). Tumors expressing KIT or PDGFRA oncoproteins were indistinguishable with respect to activation of downstream signaling intermediates and cytogenetic changes associated with tumor progression. Thus, KIT and PDGFRA mutations appear to be alternative and mutually exclusive oncogenic mechanisms in GISTs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heinrich, Michael C -- Corless, Christopher L -- Duensing, Anette -- McGreevey, Laura -- Chen, Chang-Jie -- Joseph, Nora -- Singer, Samuel -- Griffith, Diana J -- Haley, Andrea -- Town, Ajia -- Demetri, George D -- Fletcher, Christopher D M -- Fletcher, Jonathan A -- New York, N.Y. -- Science. 2003 Jan 31;299(5607):708-10. Epub 2003 Jan 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Department of Pathology, Oregon Health & Science University Cancer Institute and Portland VA Medical Center, Portland, OR 97201, USA. heinrich@ohsu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12522257" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CHO Cells ; Chromosome Aberrations ; Cricetinae ; DNA-Binding Proteins/metabolism ; Enzyme Activation ; Exons ; Gastrointestinal Neoplasms/*genetics/metabolism ; Humans ; Karyotyping ; Mitogen-Activated Protein Kinases/metabolism ; Mutation ; Oncogenes ; Phosphorylation ; *Protein-Serine-Threonine Kinases ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-akt ; Proto-Oncogene Proteins c-kit/*genetics/metabolism ; Receptor, Platelet-Derived Growth Factor alpha/*genetics/metabolism ; STAT1 Transcription Factor ; STAT3 Transcription Factor ; Signal Transduction ; Trans-Activators/metabolism
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  • 9
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    BAFF-R, a newly identified TNF receptor that specifically interacts with BAFF (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-18
    Description: B cell homeostasis has been shown to critically depend on BAFF, the B cell activation factor from the tumor necrosis factor (TNF) family. Although BAFF is already known to bind two receptors, BCMA and TACI, we have identified a third receptor for BAFF that we have termed BAFF-R. BAFF-R binding appears to be highly specific for BAFF, suggesting a unique role for this ligand-receptor interaction. Consistent with this, the BAFF-R locus is disrupted in A/WySnJ mice, which display a B cell phenotype qualitatively similar to that of the BAFF-deficient mice. Thus, BAFF-R appears to be the principal receptor for BAFF-mediated mature B cell survival.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thompson, J S -- Bixler, S A -- Qian, F -- Vora, K -- Scott, M L -- Cachero, T G -- Hession, C -- Schneider, P -- Sizing, I D -- Mullen, C -- Strauch, K -- Zafari, M -- Benjamin, C D -- Tschopp, J -- Browning, J L -- Ambrose, C -- New York, N.Y. -- Science. 2001 Sep 14;293(5537):2108-11. Epub 2001 Aug 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biogen, 12 Cambridge Center, Cambridge, MA 02142, USA., The Institute of Biochemistry, University of Lausanne, CH-1066, Epalinges, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11509692" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; B-Cell Activating Factor ; B-Cell Activation Factor Receptor ; B-Cell Maturation Antigen ; B-Lymphocytes/immunology/metabolism/*physiology ; Cell Line ; Chromosome Mapping ; Chromosomes, Human, Pair 22 ; Cloning, Molecular ; Homeostasis ; Humans ; Ligands ; Lymphoid Tissue/metabolism ; Male ; Membrane Proteins/*metabolism ; Mice ; Mice, Inbred A ; Mice, Inbred C57BL ; Molecular Sequence Data ; RNA, Messenger/chemistry/genetics/metabolism ; Receptors, Tumor Necrosis Factor/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; Transfection ; Transmembrane Activator and CAML Interactor Protein ; Tumor Necrosis Factor-alpha/*metabolism
    Print ISSN: 0036-8075
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  • 10
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    Extension of life-span by loss of CHICO, a Drosophila insulin receptor substrate protein (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-04-09
    Description: The Drosophila melanogaster gene chico encodes an insulin receptor substrate that functions in an insulin/insulin-like growth factor (IGF) signaling pathway. In the nematode Caenorhabditis elegans, insulin/IGF signaling regulates adult longevity. We found that mutation of chico extends fruit fly median life-span by up to 48% in homozygotes and 36% in heterozygotes. Extension of life-span was not a result of impaired oogenesis in chico females, nor was it consistently correlated with increased stress resistance. The dwarf phenotype of chico homozygotes was also unnecessary for extension of life-span. The role of insulin/IGF signaling in regulating animal aging is therefore evolutionarily conserved.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clancy, D J -- Gems, D -- Harshman, L G -- Oldham, S -- Stocker, H -- Hafen, E -- Leevers, S J -- Partridge, L -- New York, N.Y. -- Science. 2001 Apr 6;292(5514):104-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University College London, Wolfson House, 4 Stephenson Way, London NW1 2HE, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11292874" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/*physiology ; Alleles ; Animals ; Body Constitution ; Carrier Proteins/genetics/metabolism ; Crosses, Genetic ; *Drosophila Proteins ; Drosophila melanogaster/genetics/*physiology ; Female ; Fertility ; Genes, Insect ; Heterozygote ; Hot Temperature ; Insect Proteins/*genetics/*metabolism ; Insulin/metabolism ; Insulin Receptor Substrate Proteins ; *Intracellular Signaling Peptides and Proteins ; Longevity/*physiology ; Male ; Mutation ; Oxidative Stress ; Protein-Tyrosine Kinases/genetics/metabolism ; *Receptor Protein-Tyrosine Kinases ; Receptor, Insulin/*metabolism ; Reproduction ; Signal Transduction ; Somatomedins/metabolism ; Starvation ; Superoxide Dismutase
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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