Abstract:
:The peroxisome proliferator-activated receptor gamma, co-activator 1 alpha(PGC1α) effectively induced the biosynthesis of the mitochondria and the energy metabolism, and also regulated the muscle fiber-type shift. Overexpression of PGC1α gene in mice led to higher oxidative muscle fiber composition in muscle. However, no researches about the significant differences of muscle fiber phenotype in pigs after PGC1α overexpression had been reported. The composition of muscle fiber-types which were distinguished by four myosin heavy chain(MYHC) isoforms, can significantly affect the muscle functions. In our study, we generated the transgenic pigs to investigate the effect of overexpression of PGC1α gene on muscle fiber-type conversion. The results showed that the number of oxidative muscle fiber(type1 muscle fiber) was increased and the number of glycolytic muscle fiber(type2b muscle fiber) was decreased in the transgenic pigs. Furthermore, we found that PGC1α overexpression up-regulated the expression of MYHC1 and MYHC2a and down-regulated the expression of MYHC2b.The analysis of genes expression demonstrated the main differentially expressed genes were MSTN, Myog and FOXO1. In conclusion, the overexpression of PGC1α gene can promote the glycolytic muscle fiber transform to the oxidative muscle fiber in pigs.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Ying F,Zhang L,Bu G,Xiong Y,Zuo Bdoi
10.1016/j.bbrc.2016.10.113subject
Has Abstractpub_date
2016-11-25 00:00:00pages
669-674issue
4eissn
0006-291Xissn
1090-2104pii
S0006-291X(16)31800-9journal_volume
480pub_type
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