Physical Inactivity and Insulin Resistance in Skeletal Muscle.

Summary

The purpose of this study is to determine how a decline in physical activity acutely leads to a decrease in insulin sensitivity in skeletal muscle. The hypothesis is that the loss of insulin sensitivity following physical inactivity is caused by a rapid reduction in skeletal muscle mitochondrial oxidative capacity.

Timeline

Start

2009-06

Primary completion

2011-10

Completion

2011-12

Outcome

Outcome not reported

Stopped: “protocol not approved by VA R\&D”

Publications

• Background Shulman GI. Cellular mechanisms of insulin resistance. J Clin Invest. 2000 Jul;106(2):171-6. doi: 10.1172/JCI10583. No abstract available.
• Background Haapanen N, Miilunpalo S, Pasanen M, Oja P, Vuori I. Agreement between questionnaire data and medical records of chronic diseases in middle-aged and elderly Finnish men and women. Am J Epidemiol. 1997 Apr 15;145(8):762-9. doi: 10.1093/aje/145.8.762.
• Background Koves TR, Li P, An J, Akimoto T, Slentz D, Ilkayeva O, Dohm GL, Yan Z, Newgard CB, Muoio DM. Peroxisome proliferator-activated receptor-gamma co-activator 1alpha-mediated metabolic remodeling of skeletal myocytes mimics exercise training and reverses lipid-induced mitochondrial inefficiency. J Biol Chem. 2005 Sep 30;280(39):33588-98. doi: 10.1074/jbc.M507621200. Epub 2005 Aug 3.
• Background Russell AP, Feilchenfeldt J, Schreiber S, Praz M, Crettenand A, Gobelet C, Meier CA, Bell DR, Kralli A, Giacobino JP, Deriaz O. Endurance training in humans leads to fiber type-specific increases in levels of peroxisome proliferator-activated receptor-gamma coactivator-1 and peroxisome proliferator-activated receptor-alpha in skeletal muscle. Diabetes. 2003 Dec;52(12):2874-81. doi: 10.2337/diabetes.52.12.2874.
• Background Suwa M, Egashira T, Nakano H, Sasaki H, Kumagai S. Metformin increases the PGC-1alpha protein and oxidative enzyme activities possibly via AMPK phosphorylation in skeletal muscle in vivo. J Appl Physiol (1985). 2006 Dec;101(6):1685-92. doi: 10.1152/japplphysiol.00255.2006. Epub 2006 Aug 10.
• Background Kawate R, Yamakido M, Nishimoto Y, Bennett PH, Hamman RF, Knowler WC. Diabetes mellitus and its vascular complications in Japanese migrants on the Island of Hawaii. Diabetes Care. 1979 Mar-Apr;2(2):161-70. doi: 10.2337/diacare.2.2.161.

Drugs

Indications