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  • 1
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    Insulin resistance and a diabetes mellitus-like syndrome in mice lacking the protein kinase Akt2 (PKB beta) (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-02
    Description: Glucose homeostasis depends on insulin responsiveness in target tissues, most importantly, muscle and liver. The critical initial steps in insulin action include phosphorylation of scaffolding proteins and activation of phosphatidylinositol 3-kinase. These early events lead to activation of the serine-threonine protein kinase Akt, also known as protein kinase B. We show that mice deficient in Akt2 are impaired in the ability of insulin to lower blood glucose because of defects in the action of the hormone on liver and skeletal muscle. These data establish Akt2 as an essential gene in the maintenance of normal glucose homeostasis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cho, H -- Mu, J -- Kim, J K -- Thorvaldsen, J L -- Chu, Q -- Crenshaw, E B 3rd -- Kaestner, K H -- Bartolomei, M S -- Shulman, G I -- Birnbaum, M J -- GM07229/GM/NIGMS NIH HHS/ -- P30 19525/PHS HHS/ -- P30 DK50306/DK/NIDDK NIH HHS/ -- R01 DK040936/DK/NIDDK NIH HHS/ -- R01 DK56886/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2001 Jun 1;292(5522):1728-31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11387480" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Glucose/metabolism ; Deoxyglucose/metabolism ; Diabetes Mellitus, Type 2/*metabolism ; Female ; Gene Targeting ; Glucose/*metabolism ; Glucose Clamp Technique ; Glucose Tolerance Test ; Homeostasis ; Insulin/administration & dosage/blood/*metabolism ; *Insulin Resistance/genetics/physiology ; Islets of Langerhans/cytology/physiology ; Liver/metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Muscle, Skeletal/enzymology/metabolism ; *Protein-Serine-Threonine Kinases ; Proto-Oncogene Proteins/*genetics/*metabolism ; Proto-Oncogene Proteins c-akt ; Signal Transduction
    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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    Mitochondrial dysfunction and type 2 diabetes (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-01-22
    Description: Maintenance of normal blood glucose levels depends on a complex interplay between the insulin responsiveness of skeletal muscle and liver and glucose-stimulated insulin secretion by pancreatic beta cells. Defects in the former are responsible for insulin resistance, and defects in the latter are responsible for progression to hyperglycemia. Emerging evidence supports the potentially unifying hypothesis that both of these prominent features of type 2 diabetes are caused by mitochondrial dysfunction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lowell, Bradford B -- Shulman, Gerald I -- R01 DK040936/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2005 Jan 21;307(5708):384-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Beth Israel Deaconess Medical Center, 99 Brookline Avenue, Harvard Medical School, Boston, MA 02215, USA. blowell@bidmc.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15662004" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate ; Animals ; Diabetes Mellitus, Type 2/*physiopathology ; Fatty Acids/metabolism ; Gene Expression Regulation ; Glucose/metabolism ; Humans ; Hyperglycemia/physiopathology ; Insulin/secretion ; Insulin Resistance ; Ion Channels ; Islets of Langerhans/cytology/*physiology/secretion ; Liver/metabolism ; Membrane Transport Proteins/genetics/metabolism ; Mitochondria/*physiology ; Mitochondrial Proteins/genetics/metabolism ; Models, Biological ; Muscle, Skeletal/metabolism ; Obesity/physiopathology ; Oxidation-Reduction ; Oxidative Phosphorylation ; Superoxides/metabolism ; Transcription Factors/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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  • 3
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    Mitochondrial dysfunction in the elderly: possible role in insulin resistance (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-17
    Description: Insulin resistance is a major factor in the pathogenesis of type 2 diabetes in the elderly. To investigate how insulin resistance arises, we studied healthy, lean, elderly and young participants matched for lean body mass and fat mass. Elderly study participants were markedly insulin-resistant as compared with young controls, and this resistance was attributable to reduced insulin-stimulated muscle glucose metabolism. These changes were associated with increased fat accumulation in muscle and liver tissue assessed by 1H nuclear magnetic resonance (NMR) spectroscopy, and with a approximately 40% reduction in mitochondrial oxidative and phosphorylation activity, as assessed by in vivo 13C/31P NMR spectroscopy. These data support the hypothesis that an age-associated decline in mitochondrial function contributes to insulin resistance in the elderly.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3004429/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3004429/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Petersen, Kitt Falk -- Befroy, Douglas -- Dufour, Sylvie -- Dziura, James -- Ariyan, Charlotte -- Rothman, Douglas L -- DiPietro, Loretta -- Cline, Gary W -- Shulman, Gerald I -- K-23 DK-02347/DK/NIDDK NIH HHS/ -- K23 DK002734/DK/NIDDK NIH HHS/ -- K23 DK002734-04/DK/NIDDK NIH HHS/ -- M01 RR-00125/RR/NCRR NIH HHS/ -- P30 DK-45735/DK/NIDDK NIH HHS/ -- P60 AG-10469/AG/NIA NIH HHS/ -- R01 AG-09872/AG/NIA NIH HHS/ -- R01 AG023686/AG/NIA NIH HHS/ -- R01 AG023686-01A1/AG/NIA NIH HHS/ -- R01 DK-49230/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2003 May 16;300(5622):1140-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12750520" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue ; Adolescent ; Adult ; Aged ; Aged, 80 and over ; Aging/metabolism ; Blood Glucose/metabolism ; Body Mass Index ; Female ; Humans ; Insulin/metabolism ; *Insulin Resistance ; Liver/metabolism ; Male ; Middle Aged ; Mitochondria/*metabolism ; Mitochondrial Diseases/blood/*complications/metabolism ; Muscle, Skeletal/metabolism ; Nuclear Magnetic Resonance, Biomolecular ; Oxidation-Reduction ; Oxygen Consumption ; Phosphorylation ; Triglycerides/*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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