title: Comparison of proteolytic-related gene expression in the skeletal muscles of layer and broiler chickens.
abstract: Previous studies have shown that the muscle protein degradation rates of broiler are lower than those of layer chickens. In this study, we assessed proteolytic-related gene expression in the pectoralis muscle of layer and broiler chickens. The mRNA levels of atrogin-1/MAFbx and proteasome C2 subunit, but not those of ubiquitin, m-calpain large subunit, cathepsin B, or caspase-3, were lower in the skeletal muscle of the broilers than in the layers at 7 and 14 d of age. We infer that the lower muscle protein degradation of broilers than of layers at least partly relates to lower mRNA expression of atrogin-1/MAFbx and proteasome C2 subunit in the skeletal muscle of broilers.
authors: Molecular Nutrition Research Team, National Institute of Livestock and Grassland Science, Tsukuba, Japan. kaznaka@affrc.go.jp
authors: Kazuki
authors: K
authors: Nakashima
authors: Aiko
authors: A
authors: Ishida
authors: Masaya
authors: M
authors: Katsumata
mesh_terms: D000818:Animals; D001835:Body Weight; D002645:Chickens / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D009929:Organ Size; D010369:Pectoralis Muscles / Q000033:anatomy & histology / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D013997:Time Factors
chemical_list: D012333:RNA, Messenger