Oxidative stress and disuse muscle atrophy: cause or consequence?
This review will discuss the evidence both for and against the concept that reactive oxygen species (ROS) play an important role in the regulation of inactivity-induced skeletal muscle atrophy. It is well established that prolonged skeletal muscle inactivity causes muscle fiber atrophy and a decreas...
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Published in | Current opinion in clinical nutrition and metabolic care Vol. 15; no. 3; p. 240 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
England
01.05.2012
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Abstract | This review will discuss the evidence both for and against the concept that reactive oxygen species (ROS) play an important role in the regulation of inactivity-induced skeletal muscle atrophy.
It is well established that prolonged skeletal muscle inactivity causes muscle fiber atrophy and a decrease in muscle force production. This disuse-induced muscle atrophy is the consequence of a loss in muscle protein resulting from increased protein degradation and decreased protein synthesis. Recent studies suggest that oxidative stress can influence cell-signaling pathways that regulate both muscle protein breakdown and synthesis during prolonged periods of disuse. Specifically, it is feasible that increased ROS production in muscle fibers can promote increased proteolysis and also depress protein synthesis during periods of skeletal muscle inactivity.
Although it is established that oxidants can participate in the regulation of protein turnover in cells, there remains debate as to whether oxidative stress is required for disuse skeletal muscle atrophy. Nonetheless, based on emerging evidence we conclude that increased ROS production in skeletal muscles significantly contributes to inactivity-induced muscle atrophy. |
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AbstractList | This review will discuss the evidence both for and against the concept that reactive oxygen species (ROS) play an important role in the regulation of inactivity-induced skeletal muscle atrophy.
It is well established that prolonged skeletal muscle inactivity causes muscle fiber atrophy and a decrease in muscle force production. This disuse-induced muscle atrophy is the consequence of a loss in muscle protein resulting from increased protein degradation and decreased protein synthesis. Recent studies suggest that oxidative stress can influence cell-signaling pathways that regulate both muscle protein breakdown and synthesis during prolonged periods of disuse. Specifically, it is feasible that increased ROS production in muscle fibers can promote increased proteolysis and also depress protein synthesis during periods of skeletal muscle inactivity.
Although it is established that oxidants can participate in the regulation of protein turnover in cells, there remains debate as to whether oxidative stress is required for disuse skeletal muscle atrophy. Nonetheless, based on emerging evidence we conclude that increased ROS production in skeletal muscles significantly contributes to inactivity-induced muscle atrophy. |
Author | Judge, Andrew R Smuder, Ashley J Powers, Scott K |
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SubjectTerms | Humans Muscle Proteins - metabolism Muscle, Skeletal - metabolism Muscle, Skeletal - pathology Muscular Atrophy - etiology Muscular Atrophy - metabolism Muscular Atrophy - pathology Muscular Disorders, Atrophic - complications Muscular Disorders, Atrophic - metabolism Muscular Disorders, Atrophic - pathology Oxidative Stress Proteolysis Reactive Oxygen Species - metabolism Signal Transduction |
Title | Oxidative stress and disuse muscle atrophy: cause or consequence? |
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