Stretch-induced transformations in myosin expression of quail anterior latissimus dorsi muscle.

摘要: We have previously found alterations in expression of native myosin isoforms during adaptations to 30 d stretch-induced hypertrophy the quail anterior latissimus dorsi muscle (ALD). However, heavy and light chain not been studied stretch. In current study, chains were characterized after placing a weight on one wing Japanese for 0, 7, 14, or 21 (N = 8 birds.d-1). ALD mass was significantly greater at days 14 (67.0 +/- 4.4%) (70.2 4.0%) stretch compared day 7 (53.6 2.9%) Native slow myosin-2 (SM2) increased from 43.1 17% control muscles 55 1.2% muscles, relative total pool. The increase SM2 (approximately 12%) observed all three time points contrast, myosin-1 (SM1) decreased 34.1% 1.7% 24.6 There an slowly chain-two (SHC2) concurrent with downregulation chain-1 (shc1). no change percentages either fast overloaded any following These results demonstrate that changes expression, but accompany ALD.