通过与p-eIF2α结合,ARRB1降低了乙氨基诱导的肝毒性,以抑制ER应激信号
Yujun Luo1,2, Yiming Lei1,2, Haoxiong Zhou1,2
1Department of Gastroenterology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, People's Republic of China.
Cell biology and toxicology
|January 22, 2024
概括
β-Arrestin1 (ARRB1) 通过减少内分泌网膜应激和亡来保护免受乙氨基诱导的肝损伤. 这一发现表明ARRB1是药物诱导性肝损伤 (DILI) 的潜在治疗点.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 分子生物学分子生物学
- 毒理学 毒理学 毒理学
背景情况:
- 乙氨基 (APAP) 是药物诱导性肝损伤 (DILI) 的主要原因,治疗选择有限.
- β-Arrestin1 (ARRB1) 在肝脏疾病中起作用,但其在APAP诱导的肝损伤中的特定功能尚不清楚.
研究的目的:
- 研究ARRB1在APAP引起的肝损伤中的作用.
- 为了确定ARRB1是否影响在APAP暴露期间的内分泌网膜 (ER) 应激和亡.
主要方法:
- 在野生型和ARRB1淘汰赛小鼠中比较APAP诱导的肝毒性.
- 使用肝细胞系 (AML-12) 和初级肝细胞的体外研究.
- 评估组织学变化,炎症,ER压力标志物 (p-eIF2α,ATF4,CHOP) 和亡标志物 (裂开的卡斯帕斯3).
- 同免疫沉 (Co-IP) 试验评估ARRB1与ER应激元件的结合.
主要成果:
- ARRB1淘汰赛小鼠对APAP诱导的肝损伤的敏感性增加,其特征是较大的亡,肝酶 (ALT,AST) 升高和炎症升高.
- 在接受APAP治疗的小鼠中,ARRB1缺乏导致了加剧的ER压力和亡.
- 过度表达ARRB1缓解了APAP诱导的ER压力和亡.
- 发现ARRB1直接与eIF2α及其酸化形式 (p-eIF2α) 结合.
结论:
- ARRB1对APAP诱导的肝损伤起着保护作用.
- ARRB1通过向和减少ER压力和亡来发挥其保护作用.
- ARRB1代表了一种有前途的治疗点,用于管理APAP诱导的DILI.
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