Cited by 432Adipokines, Inflammation, and Metabolic DiseasesRegulation of Appetite and ObesityDiabetes, Cardiovascular Risks, and Lipoproteins

The Concurrent Accumulation of Intra-Abdominal and Subcutaneous Fat Explains the Association Between Insulin Resistance and Plasma Leptin Concentrations

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Cnop, Miriam, Landchild, Melinda J., Vidal, Josep, Havel, Peter J., Knowles, Negar G., Carr, Darcy R., Wang, Feng, Hull, Rebecca L. +5 more·2002·Diabetes

Abstract

Obesity is associated with insulin resistance, particularly when body fat has a central distribution. However, insulin resistance also frequently occurs in apparently lean individuals. It has been proposed that these lean insulin-resistant individuals have greater amounts of body fat than lean insulin-sensitive subjects. Alternatively, their body fat distribution may be different. Obesity is associated with elevated plasma leptin levels, but some studies have suggested that insulin sensitivity is an additional determinant of circulating leptin concentrations. To examine how body fat distribution contributes to insulin sensitivity and how these variables are related to leptin levels, we studied 174 individuals (73 men, 101 women), a priori classified as lean insulin-sensitive (LIS, n = 56), lean insulin-resistant (LIR, n = 61), and obese insulin-resistant (OIR, n = 57) based on their BMI and insulin sensitivity index (SI). Whereas the BMI of the two lean groups did not differ, the SI of the LIR subjects was less than half that of the LIS group. The subcutaneous and intra-abdominal fat areas, determined by computed tomography, were 45 and 70% greater in the LIR subjects (P < 0.001) and 2.5- and 3-fold greater in the OIR group, as compared with the LIS group. Fasting plasma leptin levels were moderately increased in LIR subjects (10.8 ± 7.1 vs. 8.1 ± 6.4 ng/ml in LIS subjects; P < 0.001) and doubled in OIR subjects (21.9 ± 15.5 ng/ml; P < 0.001). Because of the confounding effect of body fat, we examined the relationships between adiposity, insulin sensitivity, and leptin concentrations by multiple regression analysis. Intra-abdominal fat was the best variable predicting insulin sensitivity in both genders and explained 54% of the variance in SI. This inverse relationship was nonlinear (r = −0.688). On the other hand, in both genders, fasting leptin levels were strongly associated with subcutaneous fat area (r = 0.760) but not with intra-abdominal fat. In line with these analyses, when LIS and LIR subjects were matched for subcutaneous fat area, age, and gender, they had similar leptin levels, whereas their intra-abdominal fat and insulin sensitivity remained different. Thus, accumulation of intra-abdominal fat correlates with insulin resistance, whereas subcutaneous fat deposition correlates with circulating leptin levels. We conclude that the concurrent increase in these two metabolically distinct fat compartments is a major explanation for the association between insulin resistance and elevated circulating leptin concentrations in lean and obese subjects.

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Authors
Cnop, M., Landchild, M. J., Vidal, J., Havel, P. J., Knowles, N. G., Carr, D. R., Wang, F., Hull, R. L., Boyko, E. J., Retzlaff, B. M., Walden, C. E., Knopp, R. H., & Kahn, S. E.
Affiliations
  • Harborview Medical Center (US)
  • Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, VA Puget Sound Health Care System, and Harborview Medical Center, Seattle, Washington
  • University of California, Davis (US)
  • University of Washington (US)
  • University of Arizona (US)
Venue
Diabetes
Published
2002-04-01
Volume
51
Issue
4
Pages
1005-1015
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2166933182
Cited by
432
References
70
Citations by year
2026: 5 · 2025: 7 · 2024: 17 · 2023: 7 · 2022: 7 · 2021: 4 · 2020: 9 · 2019: 14 · 2018: 13 · 2017: 17 · 2016: 15 · 2015: 24 · 2014: 19 · 2013: 23 · 2012: 16
FWCI
21.86
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
  • Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) (submittedVersion, other-oa)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • American Diabetes Association
  • U.S. Department of Agriculture
  • U.S. Department of Veterans Affairs
  • Belgian American Educational Foundation
  • University of Washington (DK17047, DK-35816)
  • Ministerio de Ciencia y Tecnología
  • National Institutes of Health (DK-35747)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-35816, K24DK002654, DK 50129, DK -35747, DK 02654, DK-17047, R01DK050129, P30DK035816, P30DK017047, P30DK035747)
  • National Center for Research Resources (RR 37)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
leptin, intra-abdominal fat, subcutaneous adipose tissue, body fat distribution, obesity, insulin sensitivity index, adiposity, visceral fat, leptin resistance, body mass index, sex differences, abdominal obesity, leptin secretion, insulin secretion, adipokines, adipose tissue hormones
MeSH terms
Abdomen, Adipose Tissue, Adult, Aged, Body Constitution, Diet, Eggs, Fasting, Female, Humans, Insulin Resistance, Lipids, Male, Middle Aged, Obesity, Sex Characteristics, Skin, Thinness, Tomography, X-Ray Computed, Leptin

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