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Protein turnover in atrophying muscle: from nutritional intervention to microarray expression analysisPURPOSE OF REVIEW: In response to decreased usage, skeletal muscle undergoes adaptive reductive remodeling due to the decrease in tension on the weight bearing components of the musculo-skeletal system. This response occurs with uncomplicated disuse (e.g. bed rest, space flight), as a secondary consequence of several widely prevalent chronic diseases for which activity is reduced (e.g. chronic obstructive pulmonary disease and chronic heart failure) and is part of the aging process. The problem is therefore one of considerable clinical importance. RECENT FINDINGS: The impaired function and exercise intolerance is related more to the associated muscle wasting rather than to the specific organ system primarily impacted by the disease. Progress has continued in describing the use of anabolic drugs and dietary manipulation. The major advance in the field has been: (i) the discovery of the atrogin-1 gene and (ii) the application of microarray expression analysis and proteomics with the objectives of obtaining comprehensive understanding of the pathways changed with disuse atrophy. SUMMARY: Disuse atrophy is a common clinical problem. There is a need for therapeutic interventions that do not involve exercise. A better understanding of the changes, particularly at the molecular level, could indicate hitherto unsuspected sites for nutritional and pharmacological intervention.
Document ID
20040087923
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Stein, T. Peter
(2 Medical Center Drive Stratford, NJ 08084, United States)
Wade, Charles E.
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Current opinion in clinical nutrition and metabolic care
Volume: 6
Issue: 1
ISSN: 1363-1950
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Regulatory Physiology
NASA Center ARC
Review, Tutorial
Review

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