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Proteomic analysis of rat soleus muscle undergoing hindlimb suspension‐induced atrophy and reweighting hypertrophy
Author(s) -
Isfort Robert J.,
Wang Feng,
Greis Kenneth D.,
Sun Yiping,
Keough Thomas W.,
Farrar Roger P.,
Bodine Sue C.,
Anderson N. Leigh
Publication year - 2002
Publication title -
proteomics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.26
H-Index - 167
eISSN - 1615-9861
pISSN - 1615-9853
DOI - 10.1002/1615-9861(200205)2:5<543::aid-prot543>3.0.co;2-k
Subject(s) - soleus muscle , hindlimb , atrophy , muscle atrophy , muscle hypertrophy , proteome , skeletal muscle , endocrinology , medicine , biology , amyotrophy , chemistry , biochemistry
A proteomic analysis was performed comparing normal rat soleus muscle to soleus muscle that had undergone either 0.5, 1, 2, 4, 7, 10 and 14 days of hindlimb suspension‐induced atrophy or hindlimb suspension‐induced atrophied soleus muscle that had undergone 1 hour, 8 hour, 1 day, 2 day, 4 day and 7 days of reweighting‐induced hypertrophy. Muscle mass measurements demonstrated continual loss of soleus mass occurred throughout the 21 days of hindlimb suspension; following reweighting, atrophied soleus muscle mass increased dramatically between 8 hours and 1 day post reweighting. Proteomic analysis of normal and atrophied soleus muscle demonstrated statistically significant changes in the relative levels of 29 soleus proteins. Reweighting following atrophy demonstrated statistically significant changes in the relative levels of 15 soleus proteins. Protein identification using mass spectrometry was attempted for all differentially regulated proteins from both atrophied and hypertrophied soleus muscle. Five differentially regulated proteins from the hindlimb suspended atrophied soleus muscle were identified while five proteins were identified in the reweighting‐induced hypertrophied soleus muscles. The identified proteins could be generally grouped together as metabolic proteins, chaperone proteins and contractile apparatus proteins. Together these data demonstrate that coordinated temporally regulated changes in the skeletal muscle proteome occur during disuse‐induced soleus muscle atrophy and reweighting hypertrophy.