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在受热应激的Hu绵羊肌细胞中,SMAD2的抑制作用

Jiawei Lu¹, Yilan Liu¹, Huixia Li¹

¹College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, 210095, China.

Journal of thermal biology

|August 23, 2025

概括

热应激对绵羊肌肉发育有负面影响. 发现SMAD2通过抑制绵羊肌细胞的增殖,分化和促进细胞亡来抑制肌细胞发生.

科学领域:

动物科学
分子生物学
细胞生物学

背景情况:

热应激对牲畜健康构成重大威胁,导致肌肉损伤和肌肉发育受损.
肌肉形成过程是一个复杂的途径,
需要进一步阐明SMAD2在受热应激的Hu绵羊肌细胞细胞形成中的特殊作用.

研究的目的:

研究SMAD2在受热压力的Hu绵羊肌细胞的功能.
确定SMAD2对受热压力的绵羊肌细胞的增殖,分化和亡的影响.

主要方法:

羊的肌细胞受到热应激.
使用si-SMAD2-446和pcDNA3.1-SMAD2转染来调节SMAD2的表达.
分析了与增殖 (PCNA,CCND1,CDK2),分化 (MYOD,MYOG) 和亡 (BAX,BCL-2,Caspase3,Caspase9) 相关的基因的表达水平.

主要成果:

热应激导致Hu绵羊肌细胞中SMAD2的表达增加.
通过降低PCNA,CCND1和CDK2的调节,SMAD2抑制了肌细胞增殖.
通过减少MYOD和MYOG的表达,SMAD2抑制了分化.
通过BAX,BCL-2,Caspase3和Caspase9的激活,SMAD2促进了细胞亡.

结论:

在受热应激的Hu绵羊肌细胞中,SMAD2起到抑制因素的作用.
这些发现凸显了SMAD2在不利环境条件下调节肌肉发育的关键作用.

关键词:

热应力黄羊黄羊骨髓细胞骨髓形成一个 SMAD2

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