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

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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  • Stimulation of blood flow to insulin-sensitive tissues during insulin/glucose and glucose infusion may be an important determinant of the rate of in vivo glucose uptake.

    “First, there is increasing evidence that stimulation of blood flow to insulin-sensitive tissues during insulin/glucose and glucose infusion may be an important determinant of the rate of in vivo glucose uptake (10, 11, 38).”

    From Differential effects of hyperinsulinemia and carbohydrate metabolism on sympathetic nerve activity and muscle blood flow in humans (1993) · cites this paper as [11]

    The Discussion (page not provided) says increased blood flow is closely linked to glucose uptake and may contribute particularly after two hours of hyperinsulinemia. The Protocol describes insulin infusion with glucose clamped at euglycemia, but the paper does not establish the same point for glucose infusion without insulin. Its findings also concern skeletal muscle rather than insulin-sensitive tissues generally. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Insulin-induced stimulation of blood flow to skeletal muscle is closely correlated with insulin-mediated muscle glucose uptake.

    “More recently, evidence has accumulated in humans, indicating that insulin's cardiovascular effects may be involved in metabolic regulation (10, 11). Insulin-induced stimulation of blood flow to skeletal muscle, a major insulin-sensitive tissue, has been found to be closely correlated with insulin-mediated muscle glucose uptake.”
  • Insulin resistance is associated with attenuated hyperinsulinemia-induced vasodilation in skeletal muscle.

    “as recent evidence indicates that insulin resistance is associated with attenuated hyperinsulinemia-induced vasodilation in skeletal muscle (10, 11).”
  • Insulin-induced increases in skeletal muscle blood flow play an important role in glucose delivery and uptake, and impaired insulin-induced vasodilation in skeletal muscle contributes importantly to reduced glucose uptake in skeletal muscle and to insulin resistance.

    “Laakso et al83 introduced the concept that insulin-induced increases in skeletal muscle blood flow play an important role in glucose delivery and uptake, i.e. impaired insulin-induced vasodilation in skeletal muscle contributes importantly to reduced glucose uptake in skeletal muscle and to insulin resistance.”
  • Insulin-induced vasodilation in skeletal muscle is reduced in obese, insulin resistant humans.

    “Laakso et al83 reported that insulin-induced vasodilation in skeletal muscle is reduced in obese, insulin resistant humans.”

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Research works printed but not linked: 1

  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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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 › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Epidemiology › 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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