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在牛胚胎中,ER压力通过HRD1-PINK1/parkin轴扰乱了MFN2相关的细胞吸收.

Shu-Ming Shi1, Li-Ying Liu1, Zhi-Chao Chi1

  • 1College of Animal Sciences, Jilin University, Changchun, 130062, Jilin Province, China.

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概括
此摘要是机器生成的。

图尼卡米辛诱导的内质网膜应激会通过阻断线粒体自来损害牛胚胎的发育. 这导致线粒体损伤,能量功能障碍和亡, 阻碍胚胎质量.

关键词:
牛的胚胎细胞内膜网应力其他类型线粒体功能障碍甲状腺

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科学领域:

  • 细胞生物学
  • 发育生物学
  • 线粒体生物学

背景情况:

  • 细胞内膜网 (ER) 和线粒体是具有相互关联功能的关键器官.
  • 线粒体融合蛋白2 (MFN2) 通过线粒体关联膜 (MAM) 结构在线粒体与线粒体间的交声中起着关键作用.

研究的目的:

  • 调查突尼卡米辛 (TM) 诱导的ER应激对牛胚胎发育的影响.
  • 分析对MFN2表达,线粒体功能和线粒体的影响.

主要方法:

  • 牛胚胎被用tunicamycin (TM) 治疗以诱导ER压力.
  • 评估了胚胎细胞发育率,增殖能力和多能性基因表达 (SOX2,CDX2,OCT4).
  • 评估了未折叠蛋白质反应 (UPR) 途径蛋白,MFN2,HRD1,PINK1,帕金和线粒体自标志物 (LC3- II).

主要成果:

  • TM 治疗降低了胚胎细胞数量和胚胎增殖,抑制了多能性基因.
  • UPR通路蛋白被上调;MFN2和HRD1的表达增加,而PINK1则下降.
  • 线粒细胞吸食被阻断 (LC3- II比率降低),导致线粒体膜潜能,ATP和PGC- 1/TFAM的表达减少.
  • 显而易见的线粒体功能障碍,包括OXPHOS抑制,糖解补偿和亡标志物的增加 (细胞染色体C,Caspase3).

结论:

  • 通过HRD1介导的PINK1降解抑制了ER压力,累积了线粒体损伤.
  • 这会加剧能量代谢障碍和亡,最终会损害牛胚胎的体外发育.