运动对苏尼特羊的肌肉纤维转化,肌肉发育和肉质的影响
Lin Su1, Congying Zhao1, Bing Sun2
1Department of Food Science, College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China; Integrative Research Base of Beef and Lamb Processing Technology, Inner Mongolia Agricultural University, Hohhot, 010018, China.
Meat science
|February 7, 2024
概括
苏尼特羊的运动训练促进肌肉纤维的转化,增强骨肌肉的发育. 这项研究表明,运动改变了肌肉特征,影响了肉质,并可能改善羊羔产量.
科学领域:
- 动物科学动物科学
- 肌肉生理学 肌肉生理学
- 肉类科学 肉科学
背景情况:
- 肌肉纤维类型的组成显著影响肉类的质量和发育.
- 了解运动对绵羊肌肉生理学的影响,对于优化产量至关重要.
研究的目的:
- 为了研究运动对肌肉纤维转化,发育和肉质量的影响,在苏尼特羊的肌肉肌肉.
- 阐明运动诱导的肌肉适应所涉及的分子通路.
主要方法:
- 苏尼特羊羔被分为对照组和运动组 (90天每天6公里).
- 分析了肌肉纤维特征 (MyHC mRNA表达,纤维类型比率).
- 评估了生物化学标记物 (CK,LDH,乳酸,糖原) 和分子信号通路 (AMPK,PGC-1α,Akt,mTOR).
- 评估了肉类质量参数 (背脂厚度,pH,a*,剪切力).
主要成果:
- 运动增加了MyHC IIa mRNA的表达,并减少了MyHC IIb mRNA和IIB型纤维.
- 肌酸激酶活性和乳酸水平增加,而糖原和LDH活性随着运动而降低.
- 运动上调关键信号分子,包括AMPK/PGC-1α和Akt/mTOR通路.
- 肉质量出现了变化:背部脂肪厚度和初始pH值降低,但最终pH值,色彩和剪切力增加.
结论:
- 运动训练有效地促进了苏尼特羊的肌肉纤维转化为更氧化的表型.
- 运动通过AMPK/PGC-1α和Akt/mTOR信号通路来增强骨肌肉的发育.
- 运动训练可以成为修改肌肉特征和改善羔羊生产结果的可行策略.
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