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
