Intramuscular and liver triglycerides are increased in the elderly

Melanie G. Cree, Bradley R. Newcomer, Christos S. Katsanos, Melinda Sheffield-Moore, David Chinkes, Asle Aarsland, Randall Urban, Robert R. Wolfe

Research output: Contribution to journalArticle

176 Scopus citations

Abstract

Magnetic resonance spectroscopy studies have shown that intramyocellular lipids (IMCL) and liver fat (LFAT) levels vary with insulin sensitivity and obesity, which are common in the elderly. Thus, magnetic resonance spectroscopy was used to investigate the hypothesis that IMCL and LFAT are increased in the elderly. IMCL and LFAT in young (aged 20-32 yr) and elderly (aged 65-74 yr) were measured fasted, and glucose, insulin, total free fatty acids levels, and free fatty acids profiles were measured during a 2-h oral glucose tolerance test. Body fat percentage was determined with dual x-ray absorptiometry. The elderly had significantly greater IMCL (0.12 ± 0.01 vs. 0.08 ± 0.01, mean ± SEM; P = 0.01) and LFAT (0.28 ± 0.06 vs. 0.08 ± 0.01; P = 0.004; expressed as ratios to Intralipid standard) than the young. The elderly had increased insulin resistance as calculated by the Matsuda model compared with the young (5.1 ± 0.9 vs. 9.9 ± 1.4; P = 0.02). Regression analysis of all subjects indicated that the increases in IMCL and LFAT were correlated with insulin sensitivity, glycosylated hemoglobin, plasma lipids, and body fat. Furthermore, the correlation between insulin sensitivity and IMCL and LFAT remained significant, after accounting for the effect of body fat. Increases of IMCL and LFAT occur in elderly individuals and may be related to insulin resistance.

Original languageEnglish (US)
Pages (from-to)3864-3871
Number of pages8
JournalJournal of Clinical Endocrinology and Metabolism
Volume89
Issue number8
DOIs
StatePublished - Aug 1 2004

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Endocrinology
  • Clinical Biochemistry
  • Biochemistry, medical

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    Cree, M. G., Newcomer, B. R., Katsanos, C. S., Sheffield-Moore, M., Chinkes, D., Aarsland, A., Urban, R., & Wolfe, R. R. (2004). Intramuscular and liver triglycerides are increased in the elderly. Journal of Clinical Endocrinology and Metabolism, 89(8), 3864-3871. https://doi.org/10.1210/jc.2003-031986