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Transition from physical activity to inactivity increases skeletal muscle miR-148b content and triggers insulin resistance.


ABSTRACT: This study investigated miR-148b as a potential physiological actor of physical inactivity-induced effects in skeletal muscle. By using animal and human protocols, we demonstrated that the early phase of transition toward inactivity was associated with an increase in muscle miR-148b content, which triggered the downregulation of NRAS and ROCK1 target genes. Using human myotubes, we demonstrated that overexpression of miR-148b decreased NRAS and ROCK1 protein levels, and PKB phosphorylation and glucose uptake in response to insulin. Increase in muscle miR-148b content might thus participate in the decrease in insulin sensitivity at the whole body level during the transition toward physical inactivity.

SUBMITTER: Gastebois C 

PROVIDER: S-EPMC5027343 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature

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Transition from physical activity to inactivity increases skeletal muscle miR-148b content and triggers insulin resistance.

Gastebois Caroline C   Chanon Stéphanie S   Rome Sophie S   Durand Christine C   Pelascini Elise E   Jalabert Audrey A   Euthine Vanessa V   Pialoux Vincent V   Blanc Stéphane S   Simon Chantal C   Lefai Etienne E  

Physiological reports 20160901 17


This study investigated miR-148b as a potential physiological actor of physical inactivity-induced effects in skeletal muscle. By using animal and human protocols, we demonstrated that the early phase of transition toward inactivity was associated with an increase in muscle miR-148b content, which triggered the downregulation of NRAS and ROCK1 target genes. Using human myotubes, we demonstrated that overexpression of miR-148b decreased NRAS and ROCK1 protein levels, and PKB phosphorylation and g  ...[more]

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