Proteomic analysis of rat soleus muscle undergoing hindlimb suspension-induced atrophy and reweighting hypertrophy

• Published in: Proteomics (Weinheim) Vol. 2; no. 5; pp. 543 - 550
• Main Authors: Isfort, Robert J., Wang, Feng, Greis, Kenneth D., Sun, Yiping, Keough, Thomas W., Farrar, Roger P., Bodine, Sue C., Anderson, N. Leigh
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag GmbH 01.05.2002; WILEY‐VCH Verlag GmbH; Wiley-VCH
• Subjects: Amino Acid Sequence; Animals; Atrophy; Biological and medical sciences; Diseases of the osteoarticular system; Fundamental and applied biological sciences. Psychology; Hindlimb Suspension; Hypertrophy; Medical sciences; Miscellaneous. Osteoarticular involvement in other diseases; Molecular Sequence Data; Muscle, Skeletal - chemistry; Muscle, Skeletal - metabolism; Muscle, Skeletal - pathology; Peptide Fragments - analysis; Proteome - analysis; Rats; Skeletal muscle; Space life sciences; Striated muscle. Tendons; Vertebrates: osteoarticular system, musculoskeletal system; Atrophy; Vertebrata; Mammalia; Rat; Rodentia; Proteomics; Proteome; Soleus muscle; Striated muscle; Protein; Hypertrophy; Non-programmatic
• ISSN: 1615-9853; 1615-9861
• DOI: 10.1002/1615-9861(200205)2:5<543::AID-PROT543>3.0.CO;2-K

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.