Cited by 79Adipose Tissue and MetabolismAdipokines, Inflammation, and Metabolic DiseasesCardiovascular Disease and Adiposity

Greater adipose tissue infiltration in skeletal muscle among older men of African ancestry

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Miljkovic, Iva, Cauley, Jane A., Petit, Moira A., Ensrud, Kristine E., Strotmeyer, Elsa, Sheu, Yahtyng, Gordon, Christopher L., Goodpaster, Bret H. +7 more·2009·The Journal of Clinical Endocrinology & Metabolism

Abstract

CONTEXT: There is substantial variability across ethnic groups in the predisposition to obesity and associated metabolic abnormalities. Skeletal muscle fat has been identified as an important depot that increases with aging and may contribute to the development of diabetes. OBJECTIVE: We tested whether men of African ancestry have greater calf intermuscular adipose tissue (IMAT), compared to Caucasian men, and whether IMAT is associated with type 2 diabetes (T2D). DESIGN: We measured fasting serum glucose, body mass index, total body fat by dual-energy x-ray absorptiometry, and calf skeletal muscle composition by quantitative computed tomography in 1105 Caucasian and 518 Afro-Caribbean men aged 65+. RESULTS: Compared to Caucasian men, we found greater IMAT and lower sc adipose tissue in Afro-Caribbean men at all levels of total adiposity (P < 0.0001), including the subset of men matched on age and dual-energy x-ray absorptiometry total body fat percentage (P < 0.001). In addition, IMAT was 29 and 23% greater, whereas sc adipose tissue was 6 and 8% lower among Caucasian and Afro-Caribbean men with T2D, respectively, compared to men without T2D (P < 0.01). Observed differences in intermuscular and sc fat, both ethnic and between men with and without T2D, were independent of age, height, calf skeletal muscle and total adipose tissue, and lifestyle factors. CONCLUSIONS: Our analyses suggest that despite lower total adiposity, skeletal muscle fat infiltration is greater among African than among Caucasian ancestry men and is associated with T2D in both ethnic groups. Additional studies are needed to determine the mechanisms contributing to ethnic differences in skeletal muscle adiposity and to define the metabolic and health implications of this fat depot.

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  1. Parra EJ, Kittles RA, Argyropoulos G, Pfaff CL, Hiester K, Bonilla C, Sylvester N, Parrish-Gause D, Garvey WT, Jin L, McKeigue PM, Kamboh MI, Ferrell RE, Pollitzer WS, Shriver MD 2001 Ancestral proportions and admixture dynamics in geographically defined African Americans living in South Carolina. Am J Phys Anthropol 114:18–29 [DOI] [PubMed] [Google Scholar]

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Authors
Miljkovic, I., Cauley, J. A., Petit, M. A., Ensrud, K. E., Strotmeyer, E., Sheu, Y., Gordon, C. L., Goodpaster, B. H., Bunker, C. H., Patrick, A. L., Wheeler, V. W., Kuller, L. H., Faulkner, K. A., Zmuda, J. M., & for the Osteoporotic Fractures in Men (MrOS) Research Group the Tobago Health Studies Research Group
Affiliations
  • University of Minnesota (US)
  • McMaster University (CA)
  • University of Pittsburgh (US)
  • Tobago Health Studies Office (B.H.G., A.L.P., V.W.W.), Scarborough, Tobago, Trinidad and Tobago
Corresponding author
Miljkovic, Iva
Venue
The Journal of Clinical Endocrinology & Metabolism
Published
2009-08-01
Volume
94
Issue
8
Pages
2735-2742
ISSN
  • 0021-972X (ISSN-L)
  • 1945-7197
OpenAlex
W1977359934
Cited by
79
References
61
Citations by year
2026: 3 · 2025: 7 · 2024: 6 · 2023: 4 · 2022: 4 · 2021: 3 · 2020: 5 · 2019: 8 · 2018: 5 · 2017: 4 · 2016: 2 · 2015: 6 · 2014: 4 · 2013: 8 · 2012: 4
FWCI
2.18
Type
journal article
Language
en
Open access
Locations
  • The Journal of Clinical Endocrinology & Metabolism (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (U01AG018197, U01AG027810, U01AG042140)
  • National Institute of Diabetes and Digestive and Kidney Diseases (K01DK083029)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (U01AR045583, U01AR045580, R01AR049747, U01AR045632, U01AR045654, U01AR045614, U01AR045647, U01AR066160)
  • National Center for Research Resources (M01RR000334)
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Disease and Adiposity
Keywords
intermuscular adipose tissue, skeletal muscle fat infiltration, type 2 diabetes, Afro-Caribbean men, African ancestry, ethnic differences, subcutaneous adipose tissue, aging, older men, obesity, triceps surae
MeSH terms
Adipose Tissue, Aged, Aging, Body Composition, Humans, Insulin Resistance, Male, Body Mass Index, Walking, Muscle, Skeletal, Black People, White People, Adiposity

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