Cited by 930Diabetes, Cardiovascular Risks, and LipoproteinsCardiovascular and exercise physiologyAdipokines, Inflammation, and Metabolic Diseases

The DOI matches its Crossref record; 53 of the 53 references it cites were found in a registry or an index.

Decreased effect of insulin to stimulate skeletal muscle blood flow in obese man. A novel mechanism for insulin resistance.

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Laakso, M, Edelman, S V, Brechtel, G, Baron, A D·1990·Journal of Clinical Investigation

Abstract

Obesity is characterized by decreased rates of skeletal muscle insulin-mediated glucose uptake (IMGU). Since IMGU equals the product of the arteriovenous glucose difference (AVGd) across muscle and blood flow into muscle, reduced blood flow and/or tissue activity (AVGd) can lead to decreased IMGU. To examine this issue, we studied six lean (weight 68 +/- 3 kg, mean +/- SEM) and six obese (94 +/- 3 kg) men. The insulin dose-response curves for whole body and leg IMGU were constructed using the euglycemic clamp and leg balance techniques over a large range of serum insulin concentrations. In lean and obese subjects, whole body IMGU, AVGd, blood flow, and leg IMGU increased in a dose dependent fashion and maximal rates of all parameters were reduced in obese subjects compared to lean subjects. The dose-response curves for whole body IMGU, leg IMGU, and AVGd were right-shifted in obese subjects with an ED50 two- to threefold higher than that of lean subjects for each parameter. Leg blood flow increased approximately twofold from basal 2.7 +/- 0.2 to 4.4 +/- 0.2 dl/min in lean, P less than 0.01, and from 2.5 +/- 0.3 to 4.4 +/- 0.4 dl/min in obese subjects, P less than 0.01. The ED50 for insulin's effect to increase leg blood flow was about fourfold higher for obese (957 pmol/liter) than lean subjects (266 pmol/liter), P less than 0.01. Therefore, decreased insulin sensitivity in human obesity is not only due to lower glucose extraction in insulin-sensitive tissues but also to lower blood flow to these tissues. Thus, in vivo insulin resistance can be due to a defect in insulin action at the tissue level and/or a defect in insulin's hemodynamic action to increase blood flow to insulin sensitive tissues.

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  1. Snyder, W. S., M. J. Cook, E. S. Nasset, L. R. Karhausen, G. P. Howells, and I. H. Tipton. 1974. Report ofthe task group on reference man. A report prepared by a task group of committee 2 ofthe interna- tional commission on regional protection. Pergamon Press Ltd., Ox- ford. p. 109.

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Metadata

Authors
Laakso, M., Edelman, S. V., Brechtel, G., & Baron, A. D.
Affiliations
United States Department of Veterans Affairs (US)
Venue
Journal of Clinical Investigation
Published
1990-06-01
Volume
85
Issue
6
Pages
1844-1852
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2164471793
Cited by
930
References
52
Citations by year
2026: 5 · 2025: 7 · 2024: 7 · 2023: 8 · 2022: 15 · 2021: 3 · 2020: 9 · 2019: 16 · 2018: 13 · 2017: 14 · 2016: 22 · 2015: 27 · 2014: 18 · 2013: 28 · 2012: 24
FWCI
25.52
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Diabetes Association
  • National Institutes of Health (1f05tw003969-01)
  • Fogarty International Center (TW 03969-01)
  • National Center for Research Resources (MO1 RR00827, M01RR000827)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
  • Health Sciences › Medicine › Physiology (medical) › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adipokines, Inflammation, and Metabolic Diseases
Keywords
insulin resistance, obesity, skeletal muscle blood flow, insulin-stimulated glucose uptake, arteriovenous glucose difference, leg blood flow, insulin dose-response, euglycemic clamp, insulin sensitivity
MeSH terms
Adult, Biological Transport, Fatty Acids, Nonesterified, Glucose, Humans, Insulin, Insulin Resistance, Lactates, Leg, Muscles, Obesity, Regional Blood Flow, Regression Analysis

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