Chronic Exercise Training Down-Regulates TNF-[alpha] and Atrogin-1/MAFbx in Mouse Gastrocnemius Muscle Atrophy Induced by Hindlimb Unloading

The purpose of this study was to investigate the effect of chronic moderate-intensity training in order to prevent muscle atrophy with a focus on TNF-α and atrogin-1/MAFbx as main proteolytic indicators. Hindlimb unloading model of mice received treadmill running exercise for 1 hr per day during hin...

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Published in:Acta histochemica et cytochemica 2012-11, Vol.45 (6), p.343
Main Authors: Al-Nassan, Saad, Fujita, Naoto, Kondo, Hiroyo, Murakami, Shinichiro, Fujino, Hidemi
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container_title Acta histochemica et cytochemica
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creator Al-Nassan, Saad
Fujita, Naoto
Kondo, Hiroyo
Murakami, Shinichiro
Fujino, Hidemi
description The purpose of this study was to investigate the effect of chronic moderate-intensity training in order to prevent muscle atrophy with a focus on TNF-α and atrogin-1/MAFbx as main proteolytic indicators. Hindlimb unloading model of mice received treadmill running exercise for 1 hr per day during hindlimb unloading period of 6 weeks. The gastrocnemius muscle mass, muscle fiber cross-sectional area, and succinate dehydrogenase (SDH) activity in the muscle fiber were higher in the exercised group, while TNF-α and atrogin-1/MAFbx mRNA expressions were significantly lower. Results in the present study showed that chronic exercise could prevent over expression of TNF-α and atrogin-1/MAFbx in the atrophied skeletal muscle, providing further support to the effects of chronic exercise training on muscle atrophy.
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title Chronic Exercise Training Down-Regulates TNF-[alpha] and Atrogin-1/MAFbx in Mouse Gastrocnemius Muscle Atrophy Induced by Hindlimb Unloading
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