西格玛1在CVB3诱导的心肌炎中的调节作用
Fan Yang1, Liqin Hu1, Feng Pan2
1Department of Cardiovascular, Guanghan People's Hospital, Deyang, Sichaun, China.
General physiology and biophysics
|June 26, 2025
概括
压力诱导的蛋白1同质和含有蛋白质1 (STUB1) 的U盒通过无处置降解西格玛-1受体 (Sigmar1),促进在Coxsackievirus B3 (CVB3) 诱导的心肌炎中内等质网膜 (ER) 应激. 这种机制在体外加剧了心脏损伤.
科学领域:
- 心脏病学 心脏病学
- 分子生物学分子生物学
- 病毒学 病毒学
背景情况:
- 西格玛-1受体 (Sigmar1) 参与了内细胞网膜 (ER) 应激反应.
- 考克萨基病毒B3 (CVB3) 感染是病毒性心肌炎的常见原因,通常涉及ER压力.
研究的目的:
- 调查Sigmar1在CVB3引起的ER压力和心肌炎进展中的作用.
- 在此背景下,阐明Sigmar1与压力诱导的蛋白1同质和含有蛋白1 (STUB1) 的U盒之间的相互作用.
主要方法:
- 新生小鼠心肌细胞 (NMCs) 被CVB3感染,并被Sigmar1和/或STUB1过度表达等离子体感染.
- 使用共免疫沉 (Co-IP) 和无处不在试验,分析了STUB1和Sigmar1之间的相互作用和无处不在.
- 测量了细胞活力 (LDH释放) 和细胞亡 (TUNEL测定).
- 基因和蛋白质表达水平 (Sigmar1,STUB1,GRP78,Caspase-12,CHOP) 通过qRT-PCR和西欧斑块测定.
主要成果:
- 在NMC中,CVB3感染增加了ER压力标志物 (GRP78,Caspase-12,CHOP),LDH释放和亡.
- 西格玛1过度表达逆转了这些CVB3诱导的影响,而STUB1过度表达加剧了它们.
- 发现STUB1通过无处不在降解了Sigmar1.
- STUB1和Sigmar1的过度表达对CVB3受影响的NMC产生了相互抵消的作用.
结论:
- 通过STUB1介导的Sigmar1降解在CVB3诱导的心肌炎中促进ER压力.
- 针对STUB1-Sigmar1相互作用可能为病毒性心肌炎提供治疗策略.
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