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Published in: Diabetologia 5/2021

01-05-2021 | Obesity | Article

Heterogeneity in insulin-stimulated glucose uptake among different muscle groups in healthy lean people and people with obesity

Authors: Han-Chow E. Koh, Stephan van Vliet, Gretchen A. Meyer, Richard Laforest, Robert J. Gropler, Samuel Klein, Bettina Mittendorfer

Published in: Diabetologia | Issue 5/2021

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Abstract

Aims/hypothesis

It has been proposed that muscle fibre type composition and perfusion are key determinants of insulin-stimulated muscle glucose uptake, and alterations in muscle fibre type composition and perfusion contribute to muscle, and consequently whole-body, insulin resistance in people with obesity. The goal of the study was to evaluate the relationships among muscle fibre type composition, perfusion and insulin-stimulated glucose uptake rates in healthy, lean people and people with obesity.

Methods

We measured insulin-stimulated whole-body glucose disposal and glucose uptake and perfusion rates in five major muscle groups (erector spinae, obliques, rectus abdominis, hamstrings, quadriceps) in 15 healthy lean people and 37 people with obesity by using the hyperinsulinaemic–euglycaemic clamp procedure in conjunction with [2H]glucose tracer infusion (to assess whole-body glucose disposal) and positron emission tomography after injections of [15O]H2O (to assess muscle perfusion) and [18F]fluorodeoxyglucose (to assess muscle glucose uptake). A biopsy from the vastus lateralis was obtained to assess fibre type composition.

Results

We found: (1) a twofold difference in glucose uptake rates among muscles in both the lean and obese groups (rectus abdominis: 67 [51, 78] and 32 [21, 55] μmol kg−1 min−1 in the lean and obese groups, respectively; erector spinae: 134 [103, 160] and 66 [24, 129] μmol kg−1 min−1, respectively; median [IQR]) that was unrelated to perfusion or fibre type composition (assessed in the vastus only); (2) the impairment in insulin action in the obese compared with the lean group was not different among muscle groups; and (3) insulin-stimulated whole-body glucose disposal expressed per kg fat-free mass was linearly related with muscle glucose uptake rate (r2 = 0.65, p < 0.05).

Conclusions/interpretation

Obesity-associated insulin resistance is generalised across all major muscles, and is not caused by alterations in muscle fibre type composition or perfusion. In addition, insulin-stimulated whole-body glucose disposal relative to fat-free mass provides a reliable index of muscle glucose uptake rate.

Graphical abstract

Appendix
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Metadata
Title
Heterogeneity in insulin-stimulated glucose uptake among different muscle groups in healthy lean people and people with obesity
Authors
Han-Chow E. Koh
Stephan van Vliet
Gretchen A. Meyer
Richard Laforest
Robert J. Gropler
Samuel Klein
Bettina Mittendorfer
Publication date
01-05-2021
Publisher
Springer Berlin Heidelberg
Published in
Diabetologia / Issue 5/2021
Print ISSN: 0012-186X
Electronic ISSN: 1432-0428
DOI
https://doi.org/10.1007/s00125-021-05383-w

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