Grape polyphenols supplementation reduces muscle atrophy in a mouse model of chronic inflammation

Nutrition
Karen LambertAriane Sultan

Abstract

Polyphenols (PP) have demonstrated beneficial effects on low-grade inflammation and oxidative stress; however, little is known about their effect on highly inflamed muscle. The purposes of this study were (i) to evaluate muscle alteration induced by high-grade inflammation, and (ii) to test the effects of red grape PP supplementation on these alterations. We used a transgenic mice model (transforming growth factor [TGF] mice) to develop a high T cell-dependent inflammation and C57 BL/6 control (CTL) mice model. Skeletal muscles of TGF and CTL mice were investigated for inflammation, atrophy and oxidative stress markers. Isolated mitochondria from hindlimb muscles were used for respiration with pyruvate as substrate and oxidative damages were measured by Western blot. TGF mice were supplemented with a mixture of red grape polyphenols (50 mg/kg/d) for 4 wk. Data were analyzed by one-way analysis of variance (ANOVA) and post hoc Bonferroni's multiple comparison tests. TGF mice presented skeletal muscle inflammation, oxidative stress, mitochondrial alteration and muscle atrophy. Atrophy was associated with two distinct pathways: (i) one linked to inflammation, NF-κB activation and increased ubiquitin ligase expression, and (ii) one...Continue Reading

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Citations

Apr 2, 2016·Oxidative Medicine and Cellular Longevity·K S Petersen, C Smith
Jan 23, 2018·Current Opinion in Clinical Nutrition and Metabolic Care·Marc Francaux, Louise Deldicque
Apr 21, 2018·Nature Reviews. Rheumatology·Frederick W MillerKanneboyina Nagaraju
Sep 6, 2020·Current Opinion in Rheumatology·Marta Loredo MartinezMariele Gatto

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