Polyphenols decreased liver NADPH oxidase activity, increased muscle mitochondrial biogenesis and decreased gastrocnemius age-dependent autophagy in aged rats - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Free Radical Research Year : 2012

Polyphenols decreased liver NADPH oxidase activity, increased muscle mitochondrial biogenesis and decreased gastrocnemius age-dependent autophagy in aged rats

Abstract

This study explored major systems of reactive oxygen species (ROS) production and their consequences on oxidative stress, mitochondriogenesis and muscle metabolism in aged rats, and evaluated the efficiency of 30-day oral supplementation with a moderate dose of a red grape polyphenol extract (RGPE) on these parameters. In the liver of aged rats, NADPH oxidase activity was increased and mitochondrial respiratory chain complex activities were altered, while xanthine oxidase activity remained unchanged. In muscles, only mitochondrial activity was modified with aging. The oral intake of RGPE decreased liver NADPH oxidase activity in the aged rats without affecting global oxidative stress, suggesting that NADPH oxidase was probably not the dominant detrimental source of production of O(2)·(-) in the liver. Interestingly, RGPE supplementation increased mitochondrial biogenesis and improved antioxidant status in the gastrocnemius of aged rats, while it had no significant effect in soleus. RGPE supplementation also decreased age-dependent autophagy in gastrocnemius of aged rats. These results extended existing findings on the beneficial effects of RGPE on mitochondriogenesis and muscle metabolism in aged rats.
No file

Dates and versions

hal-02646050 , version 1 (29-05-2020)

Identifiers

Cite

Caroline Laurent, Béatrice Chabi, Gilles Fouret, Guillaume Py, Sairafi Badie, et al.. Polyphenols decreased liver NADPH oxidase activity, increased muscle mitochondrial biogenesis and decreased gastrocnemius age-dependent autophagy in aged rats. Free Radical Research, 2012, 46 (9), pp.1140-1149. ⟨10.3109/10715762.2012.694428⟩. ⟨hal-02646050⟩
11 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More