Quantitative proteome analysis of age-related changes in mouse gastrocnemius muscle using mTRAQ

Title
Quantitative proteome analysis of age-related changes in mouse gastrocnemius muscle using mTRAQ
Authors
황재영김규태최정이반영재이승민김윤기이철주권기선
Keywords
Aging; Animal proteomics; Biomarker; mTRAQ; Skeletal muscle
Issue Date
2014-01
Publisher
Proteomics
Citation
VOL 14, NO 1, 121-132
Abstract
Aging is associated with a progressive loss of skeletal muscular function that often leads to progressive disability and loss of independence. Although muscle aging is well documented, the molecular mechanisms of this condition still remain unclear. To gain greater insight into the changes associated with aging of skeletal muscle, we performed quantitative proteomic analyses on young (6 months) and aged (27 months) mouse gastrocnemius muscles using mTRAQ stable isotope mass tags. We identified and quantified a total of 4585 peptides corresponding to 236 proteins (protein probability >0.9). Among them, 33 proteins were more than 1.5-fold upregulated and 20 proteins were more than 1.5-fold downregulated in aged muscle compared with young muscle. An ontological analysis revealed that differentially expressed proteins belonged to distinct functional groups, including ion homeostasis, energy metabolism, protein turnover, and Ca2+ signaling. Identified proteins included aralar1, β-enolase, fatty acid-binding protein 3, 3-hydroxyacyl-CoA dehydrogenase (Hadh), F-box protein 22, F-box, and leucine-rich repeat protein 18, voltage-dependent L-type calcium channel subunit beta-1, ryanodine receptor (RyR), and calsequestrin. Ectopic expression of calsequestrin in C2C12 myoblast resulted in decreased activity of nuclear factor of activated T-cells and increased levels of atrogin-1 and MuRF1 E3 ligase, suggesting that these differentially expressed proteins are involved in muscle aging.
URI
http://pubs.kist.re.kr/handle/201004/48278
ISSN
16159853
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KIST Publication > Article
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