Cited by 187Adipose Tissue and MetabolismMitochondrial Function and PathologyDiabetes, Cardiovascular Risks, and Lipoproteins

Asian Indians Have Enhanced Skeletal Muscle Mitochondrial Capacity to Produce ATP in Association With Severe Insulin Resistance

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Nair, K. Sreekumaran, Bigelow, Maureen L., Asmann, Yan W., Chow, Lisa S., Coenen-Schimke, Jill M., Klaus, Katherine A., Guo, Zeng-Kui, Sreekumar, Raghavakaimal +1 more·2008·Diabetes

Abstract

OBJECTIVE— Type 2 diabetes has become a global epidemic, and Asian Indians have a higher susceptibility to diabetes than Europeans. We investigated whether Indians had any metabolic differences compared with Northern European Americans that may render them more susceptible to diabetes. RESEARCH DESIGN AND METHODS— We studied 13 diabetic Indians, 13 nondiabetic Indians, and 13 nondiabetic Northern European Americans who were matched for age, BMI, and sex. The primary comparisons were insulin sensitivity by hyperinsulinemic-euglycemic clamp and skeletal muscle mitochondrial capacity for oxidative phosphorylation (OXPHOS) by measuring mitochondrial DNA copy number (mtDNA), OXPHOS gene transcripts, citrate synthase activity, and maximal mitochondrial ATP production rate (MAPR). Other factors that may cause insulin resistance were also measured. RESULTS— The glucose infusion rates required to maintain identical glucose levels during the similar insulin infusion rates were substantially lower in diabetic Indians than in the nondiabetic participants (P < 0.001), and they were lower in nondiabetic Indians than in nondiabetic Northern European Americans (P < 0.002). mtDNA (P < 0.02), OXPHOS gene transcripts (P < 0.01), citrate synthase, and MAPR (P < 0.03) were higher in Indians irrespective of their diabetic status. Intramuscular triglyceride, C-reactive protein, interleukin-6, and tumor necrosis factor-α concentrations were higher, whereas adiponectin concentrations were lower in diabetic Indians. CONCLUSIONS— Despite being more insulin resistant, diabetic Indians had similar muscle OXPHOS capacity as nondiabetic Indians, demonstrating that diabetes per se does not cause mitochondrial dysfunction. Indians irrespective of their diabetic status had higher OXPHOS capacity than Northern European Americans, although Indians were substantially more insulin resistant, indicating a dissociation between mitochondrial dysfunction and insulin resistance.

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Authors
Nair, K. S., Bigelow, M. L., Asmann, Y. W., Chow, L. S., Coenen-Schimke, J. M., Klaus, K. A., Guo, Z.-K., Sreekumar, R., & Irving, B. A.
Affiliations
  • Mayo Clinic (US)
  • From the Division of Endocrinology, Endocrine Research Unit, Mayo Clinic College of Medicine, Rochester, Minnesota
Venue
Diabetes
Published
2008-05-01
Volume
57
Issue
5
Pages
1166-1175
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2142730929
Cited by
187
References
7
Citations by year
2026: 3 · 2025: 4 · 2023: 4 · 2022: 2 · 2021: 7 · 2020: 10 · 2019: 8 · 2018: 7 · 2017: 7 · 2016: 7 · 2015: 9 · 2014: 7 · 2013: 18 · 2012: 23
FWCI
15.58
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Civil War Book Review (submittedVersion)
Funders
  • Mayo Clinic
  • Georgia Clinical and Translational Science Alliance
  • Centers for Disease Control and Prevention
  • Center for Clinical and Translational Research
  • National Institute of Diabetes and Digestive and Kidney Diseases (T32-DK-07352-28, R01DK041973, T32DK007352)
  • National Center for Research Resources (UL1RR024150)
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
Asian Indians, type 2 diabetes, insulin resistance, skeletal muscle mitochondria, oxidative phosphorylation, mitochondrial DNA copy number, citrate synthase, intramuscular triglycerides, adiponectin, inflammatory cytokines, C-reactive protein
MeSH terms
Adenosine Triphosphate, Adult, Blood Glucose, Diabetes Mellitus, Female, Humans, India, Insulin Resistance, Male, Middle Aged, Mitochondria, Muscle, North America, Oxidative Phosphorylation, Reference Values, Glucose Clamp Technique, Body Mass Index, Muscle, Skeletal, White People

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