Abstract | INTRODUCTION: METHODS: Proteomic analysis was performed on mouse soleus subjected to hindlimb unloading (HU) and hindlimb reloading (HR) to identify new dysregulated proteins. RESULTS: Following HU, the mass and cross-sectional area of muscle fibers decreased, but they recovered after HR. Proteomic analyses revealed 9 down-regulated and 7 up-regulated proteins in HU, and 2 down-regulated and 5 up-regulated proteins in HR. The dysregulated proteins were mainly involved in energy metabolism, protein degradation, and cytoskeleton stability. Among the dysregulated proteins were fatty acid binding protein 3, α-B crystalline, and transthyretin. CONCLUSIONS: These results indicate that muscle atrophy induced by unloading is related to activation of proteolysis, metabolic alterations toward glycolysis, destruction of myofibrillar integrity, and dysregulation of heat shock proteins (HSPs). The dysregulated proteins may play a role in muscle atrophy and the recovery process.
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Authors | Fei Wang, Peng Zhang, Hongju Liu, Ming Fan, Xiaoping Chen |
Journal | Muscle & nerve
(Muscle Nerve)
Vol. 52
Issue 5
Pg. 803-11
(Nov 2015)
ISSN: 1097-4598 [Electronic] United States |
PMID | 25656502
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | © 2015 Wiley Periodicals, Inc. |
Topics |
- Animals
- Hindlimb
(physiology)
- Hindlimb Suspension
(methods)
- Male
- Mice
- Mice, Inbred C57BL
- Muscle, Skeletal
(metabolism)
- Muscular Atrophy
(genetics, metabolism)
- Proteomics
(methods)
- Weight-Bearing
(physiology)
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