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Alterations in skeletal muscle fatty acid handling predisposes middle-aged mice to diet-induced insulin resistance.

Publication ,  Journal Article
Koonen, DPY; Sung, MMY; Kao, CKC; Dolinsky, VW; Koves, TR; Ilkayeva, O; Jacobs, RL; Vance, DE; Light, PE; Muoio, DM; Febbraio, M; Dyck, JRB
Published in: Diabetes
June 2010

OBJECTIVE: Although advanced age is a risk factor for type 2 diabetes, a clear understanding of the changes that occur during middle age that contribute to the development of skeletal muscle insulin resistance is currently lacking. Therefore, we sought to investigate how middle age impacts skeletal muscle fatty acid handling and to determine how this contributes to the development of diet-induced insulin resistance. RESEARCH DESIGN AND METHODS: Whole-body and skeletal muscle insulin resistance were studied in young and middle-aged wild-type and CD36 knockout (KO) mice fed either a standard or a high-fat diet for 12 weeks. Molecular signaling pathways, intramuscular triglycerides accumulation, and targeted metabolomics of in vivo mitochondrial substrate flux were also analyzed in the skeletal muscle of mice of all ages. RESULTS: Middle-aged mice fed a standard diet demonstrated an increase in intramuscular triglycerides without a concomitant increase in insulin resistance. However, middle-aged mice fed a high-fat diet were more susceptible to the development of insulin resistance-a condition that could be prevented by limiting skeletal muscle fatty acid transport and excessive lipid accumulation in middle-aged CD36 KO mice. CONCLUSION: Our data provide insight into the mechanisms by which aging becomes a risk factor for the development of insulin resistance. Our data also demonstrate that limiting skeletal muscle fatty acid transport is an effective approach for delaying the development of age-associated insulin resistance and metabolic disease during exposure to a high-fat diet.

Duke Scholars

Published In

Diabetes

DOI

EISSN

1939-327X

Publication Date

June 2010

Volume

59

Issue

6

Start / End Page

1366 / 1375

Location

United States

Related Subject Headings

  • Obesity
  • Muscle, Skeletal
  • Mice, Knockout
  • Mice, Inbred C57BL
  • Mice
  • Insulin Resistance
  • Fatty Acids
  • Endocrinology & Metabolism
  • Calorimetry, Indirect
  • CD36 Antigens
 

Citation

APA
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ICMJE
MLA
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Koonen, D. P. Y., Sung, M. M. Y., Kao, C. K. C., Dolinsky, V. W., Koves, T. R., Ilkayeva, O., … Dyck, J. R. B. (2010). Alterations in skeletal muscle fatty acid handling predisposes middle-aged mice to diet-induced insulin resistance. Diabetes, 59(6), 1366–1375. https://doi.org/10.2337/db09-1142
Koonen, Debby P. Y., Miranda M. Y. Sung, Cindy K. C. Kao, Vernon W. Dolinsky, Timothy R. Koves, Olga Ilkayeva, René L. Jacobs, et al. “Alterations in skeletal muscle fatty acid handling predisposes middle-aged mice to diet-induced insulin resistance.Diabetes 59, no. 6 (June 2010): 1366–75. https://doi.org/10.2337/db09-1142.
Koonen DPY, Sung MMY, Kao CKC, Dolinsky VW, Koves TR, Ilkayeva O, et al. Alterations in skeletal muscle fatty acid handling predisposes middle-aged mice to diet-induced insulin resistance. Diabetes. 2010 Jun;59(6):1366–75.
Koonen, Debby P. Y., et al. “Alterations in skeletal muscle fatty acid handling predisposes middle-aged mice to diet-induced insulin resistance.Diabetes, vol. 59, no. 6, June 2010, pp. 1366–75. Pubmed, doi:10.2337/db09-1142.
Koonen DPY, Sung MMY, Kao CKC, Dolinsky VW, Koves TR, Ilkayeva O, Jacobs RL, Vance DE, Light PE, Muoio DM, Febbraio M, Dyck JRB. Alterations in skeletal muscle fatty acid handling predisposes middle-aged mice to diet-induced insulin resistance. Diabetes. 2010 Jun;59(6):1366–1375.

Published In

Diabetes

DOI

EISSN

1939-327X

Publication Date

June 2010

Volume

59

Issue

6

Start / End Page

1366 / 1375

Location

United States

Related Subject Headings

  • Obesity
  • Muscle, Skeletal
  • Mice, Knockout
  • Mice, Inbred C57BL
  • Mice
  • Insulin Resistance
  • Fatty Acids
  • Endocrinology & Metabolism
  • Calorimetry, Indirect
  • CD36 Antigens