在酒精相关的肝病中,BAX/MLKL信号传递有助于脂毒性诱导的溶酶体膜通透性
Haibo Dong1, Wei Guo1, Zhanxiang Zhou1,2
1Center for Translational Biomedical Research, The University of North Carolina at Greensboro, North Carolina Research Campus, Kannapolis, NC, USA.
Autophagy
|June 8, 2023
概括
酒精相关性肝病 (ALD) 涉及由脂毒性引发的溶酶体膜通透性 (LMP). BAX / MLKL信号通路将死细胞蛋白MLKL招募到溶解体中,导致LMP和肝损伤.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 细胞生物学 细胞生物学
- 疾病的分子机制.
背景情况:
- 溶解体膜通透性 (LMP) 在调节自和细胞死亡方面至关重要,特别是在酒精相关性肝病 (ALD) 中.
- 在ALD病原体中控制LMP的精确机制在很大程度上是未知的.
- 脂毒性已被确定为肝细胞中LMP的关键触发因素.
研究的目的:
- 在ALD的背景下,阐明在肝细胞中因脂毒性诱导的LMP背后的分子机制.
- 研究特定蛋白质BAX和MLKL在ALD期间调解LMP中的作用.
主要方法:
- 利用了各种与酒精相关的肝病 (ALD) 模型.
- 研究了 lysosome 中的 apoptotic 蛋白 BAX 和 necroptotic 蛋白 MLKL 之间的相互作用.
- 采用了针对BAX和MLKL的药理和遗传抑制策略.
主要成果:
- 证明脂毒性直接触发肝细胞中的LMP.
- 确定了阿波质蛋白BAX将死质蛋白MLKL招募到溶解体中.
- 在ALD模型中表明,抑制BAX或MLKL有效地保护肝细胞免受脂毒性诱导的LMP.
结论:
- 揭示了一个新的分子机制,其中BAX/MLKL信号介导ALD中的脂毒性诱导的LMP.
- 这种BAX/MLKL通路的激活对与酒精相关的肝病的发病有显著的贡献.
- 准BAX或MLKL为ALD提供了一个潜在的治疗策略.
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