Cited by 320Diabetes, Cardiovascular Risks, and LipoproteinsAdipose Tissue and MetabolismMetabolism, Diabetes, and Cancer

Skeletal muscle utilization of free fatty acids in women with visceral obesity.

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Colberg, S R, Simoneau, J A, Thaete, F L, Kelley, D E·1995·Journal of Clinical Investigation

Abstract

Visceral obesity is strongly associated with insulin resistance. One potential cause is increased availability of FFA. Alternatively, it has been proposed that there is impaired oxidation of lipid in individuals at risk for obesity. The extent to which either concept involves skeletal muscle is uncertain. To examine these opposing hypotheses, 17 healthy lean and obese premenopausal women, among whom cross-sectional area of visceral fat ranged from 18 to 180 cm2, participated in leg balance studies for measurement of FFA and glucose utilization during basal and insulin-stimulated conditions. A metabolic profile of skeletal muscle, based on enzyme activity, was determined in vastus lateralis muscle obtained by percutaneous biopsy. Visceral fat content was negatively correlated with insulin sensitivity (rates of leg glucose uptake and storage), but insulin resistance was not caused by glucose-FFA competition. During hyperinsulinemia, neither leg FFA uptake nor oxidation was increased in women with visceral obesity. During fasting conditions, however, rates of FFA uptake across the leg were negatively correlated with visceral adiposity as were activities of muscle carnitine palmitoyl transferase and citrate synthase. In summary, visceral adiposity is clearly associated with skeletal muscle insulin resistance but this is not due to glucose-FFA substrate competition. Instead, women with visceral obesity have reduced postabsorptive FFA utilization by muscle.

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  1. Newsholme, E., and A. Leech. 1983. Chapter 4. The oxidation of acetyl coenzyme-A. In Biochemistry for the Medical Sciences. John Wiley and Sons Ltd., Chichester, United Kingdom.

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Authors
Colberg, S. R., Simoneau, J. A., Thaete, F. L., & Kelley, D. E.
Affiliations
University of Pittsburgh (US)
Venue
Journal of Clinical Investigation
Published
1995-04-01
Volume
95
Issue
4
Pages
1846-1853
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2108879058
Cited by
320
References
48
Citations by year
2025: 3 · 2024: 2 · 2023: 5 · 2022: 2 · 2021: 6 · 2020: 4 · 2019: 4 · 2018: 6 · 2017: 7 · 2016: 6 · 2015: 3 · 2014: 4 · 2013: 8 · 2012: 8
FWCI
9.51
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
visceral obesity, skeletal muscle, free fatty acids, insulin resistance, fatty acid oxidation, carnitine palmitoyltransferase, citrate synthase, visceral fat, premenopausal women, hyperinsulinemic-euglycemic clamp, vastus lateralis
MeSH terms
Adult, Biopsy, Body Constitution, Carnitine O-Palmitoyltransferase, Citrate (si)-Synthase, Fasting, Fatty Acids, Nonesterified, Female, Glucose, Humans, Hyperinsulinism, Insulin Resistance, Intestinal Absorption, Leg, Obesity, Viscera, Premenopause, Muscle, Skeletal

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