Resistance exercise training improves glucose homeostasis by enhancing insulin secretion in C57BL/6 mice

Resistance exercise exerts beneficial effects on glycemic control, which could be mediated by exercise-induced humoral factors released in the bloodstream. Here, we used C57Bl/6 healthy mice, submitted to resistance exercise training for 10 weeks. Trained mice presented higher muscle weight and maxi...

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Bibliographic Details
Published in:Scientific reports 2021-04, Vol.11 (1), p.8574-8574, Article 8574
Main Authors: Bronczek, Gabriela Alves, Soares, Gabriela Moreira, de Barros, Jaqueline Fernandes, Vettorazzi, Jean Franciesco, Kurauti, Mirian Ayumi, Marconato-Júnior, Emílio, Zangerolamo, Lucas, Marmentini, Carine, Boschero, Antonio Carlos, Costa-Júnior, José Maria
Format: Article
Language:English
Subjects:
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Apoptosis
Beta cells
Blood glucose
Body weight
Body weight gain
Carrying capacity
Endoplasmic reticulum
Fitness training programs
Gene expression
Glucose
Glucose tolerance
Homeostasis
Humanities and Social Sciences
Insulin
Insulin secretion
multidisciplinary
Physical training
Science
Science (multidisciplinary)
Secretion
Strength training
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Summary:Resistance exercise exerts beneficial effects on glycemic control, which could be mediated by exercise-induced humoral factors released in the bloodstream. Here, we used C57Bl/6 healthy mice, submitted to resistance exercise training for 10 weeks. Trained mice presented higher muscle weight and maximum voluntary carrying capacity, combined with reduced body weight gain and fat deposition. Resistance training improved glucose tolerance and reduced glycemia, with no alterations in insulin sensitivity. In addition, trained mice displayed higher insulinemia in fed state, associated with increased glucose-stimulated insulin secretion. Islets from trained mice showed reduced expression of genes related to endoplasmic reticulum (ER) stress, associated with increased expression of Ins2. INS-1E beta-cells incubated with serum from trained mice displayed similar pattern of insulin secretion and gene expression than isolated islets from trained mice. When exposed to CPA (an ER stress inducer), the serum from trained mice partially preserved the secretory function of INS-1E cells, and prevented CPA-induced apoptosis. These data suggest that resistance training, in healthy mice, improves glucose homeostasis by enhancing insulin secretion, which could be driven, at least in part, by humoral factors.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-88105-x