Cited by 1,687Nitric Oxide and Endothelin EffectsDiabetes, Cardiovascular Risks, and LipoproteinsCardiovascular Health and Disease Prevention

Obesity/insulin resistance is associated with endothelial dysfunction. Implications for the syndrome of insulin resistance

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Steinberg, H O, Chaker, H, Leaming, R, Johnson, A, Brechtel, G, Baron, A D·1996·Journal of Clinical Investigation

Abstract

To test the hypothesis that obesity/insulin resistance impairs both endothelium-dependent vasodilation and insulin-mediated augmentation of endothelium-dependent vasodilation, we studied leg blood flow (LBF) responses to graded intrafemoral artery infusions of methacholine chloride (MCh) or sodium nitroprusside (SNP) during saline infusion and euglycemic hyperinsulinemia in lean insulin-sensitive controls (C), in obese insulin-resistant subjects (OB), and in subjects with non-insulin-dependent diabetes mellitus (NIDDM). MCh induced increments in LBF were approximately 40% and 55% lower in OB and NIDDM, respectively, as compared with C (P < 0.05). Euglycemic hyperinsulinemia augmented the LBF response to MCh by - 50% in C (P < 0.05 vs saline) but not in OB and NIDDM. SNP caused comparable increments in LBF in all groups. Regression analysis revealed a significant inverse correlation between the maximal LBF change in response to MCh and body fat content. Thus, obesity/insulin resistance is associated with (a) blunted endothelium-dependent, but normal endothelium-independent vasodilation and (b) failure of euglycemic hyperinsulinemia to augment endothelium-dependent vasodilation. Therefore, obese/insulin-resistant subjects are characterized by endothelial dysfunction and endothelial resistance to insulin's effect on enhancement of endothelium-dependent vasodilation. This endothelial dysfunction could contribute to the increased risk of atherosclerosis in obese insulin-resistant subjects.

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  • Insulin resistance per se has a direct impact on endothelial function, distinct from effects related to unfavorable changes in lipid composition or blood pressure.

    “Furthermore, IR per se has a direct impact on endothelial function, distinct from effects related to unfavorable changes in lipid composition or blood pressure (9).”

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Research works printed but not linked: 1

  1. Brozek, J., and A. Henschel. 1961. Techniques for measuring body com- position: proceedings of a conference. In Conference on Techniques for Mea- suring Body Composition. National Academy of Sciences, National Research Council. Washington DC. 78-89.

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Authors
Steinberg, H. O., Chaker, H., Leaming, R., Johnson, A., Brechtel, G., & Baron, A. D.
Affiliations
  • Indiana University (US)
  • Richard L. Roudebush VA Medical Center (US)
  • Indiana University Hospital (US)
Venue
Journal of Clinical Investigation
Published
1996-06-01
Volume
97
Issue
11
Pages
2601-2610
ISSN
0021-9738 (ISSN-L)
OpenAlex
W1982811953
Cited by
1,687
References
59
Citations by year
2026: 11 · 2025: 23 · 2024: 17 · 2023: 30 · 2022: 19 · 2021: 32 · 2020: 30 · 2019: 36 · 2018: 36 · 2017: 46 · 2016: 50 · 2015: 51 · 2014: 69 · 2013: 69 · 2012: 61
FWCI
18.69
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Veterans Affairs
  • American Heart Association
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK42469, P60DK020542, DK20542)
  • National Center for Research Resources (M 01-RR750-19)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
Keywords
obesity, insulin resistance, endothelial dysfunction, endothelium-dependent vasodilation, euglycemic hyperinsulinemia, leg blood flow, methacholine, sodium nitroprusside, type 2 diabetes, fat mass, atherosclerosis risk
MeSH terms
Adult, Blood Glucose, Blood Pressure, Cholesterol, Diabetes Mellitus, Type 2, Endothelium, Vascular, Fatty Acids, Nonesterified, Glucose, Humans, Hyperinsulinism, Infusions, Intra-Arterial, Infusions, Intravenous, Insulin, Insulin Resistance, Leg, Cholesterol, HDL, Cholesterol, LDL, Nitroprusside, Obesity, Reference Values, Regional Blood Flow, Syndrome, Time Factors, Triglycerides, Vasodilation, Glucose Clamp Technique, Body Mass Index, Methacholine Chloride

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