Lysosomal 功能障碍的参与及其与Palmitate 治疗的 HepG2 细胞中的脂毒性压力相关
Susinder Sundaram1, Debasree Bishnu1, Suman Santra2
1Basic Science and Disease Biology, John C. Martin Centre for Liver Research and Innovations, Kolkata, IND.
Cureus
|March 10, 2026
概括
非酒精性脂肪性肝病 (NAFLD) 涉及由脂肪积累引起的肝细胞损伤. 这项研究表明,溶酶体功能障碍是棕酸诱导的肝细胞损伤的晚期事件,而不是早期触发因素.
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
- 生物化学 生物化学
背景情况:
- 非酒精性脂肪性肝病 (NAFLD) 是一种普遍存在的疾病,以过度的肝脂肪积累为特征.
- 驱动NAFLD相关肝损伤的精确细胞内机制尚未完全理解.
- 研究肝细胞中的脂毒性对于理解NAFLD病变的产生至关重要.
研究的目的:
- 为了阐明有机细胞功能障碍的时间序列,以应对脂毒性压力.
- 为了确定 lysosomal 脱稳定在棕酸诱导的肝细胞损伤中的作用.
- 在NAFLD模型中探索 lysosomal 和线粒体功能障碍之间的关系.
主要方法:
- 在一个时间循环实验中,HepG2细胞被暴露在棕酸 (PA) 中.
- 评估了细胞内活性氧物种 (ROS),溶酶体不稳定,线粒体膜潜力 (MMP) 和细胞死亡.
- 使用光光谱光度计和流动细胞计进行定量分析.
主要成果:
- 暴露于PA迅速增加了细胞内脂质和ROS,随后出现了氧化还原失衡.
- 18小时后发生了 lysosomal 不稳定,释放 cathepsin B 进入细胞质.
- 观察到线粒体功能障碍,细胞染色体c释放和细胞亡,导致细胞死亡.
结论:
- 在这个模型中,溶酶体损伤作为脂毒性压力的后期整合剂.
- 这项研究澄清了棕酸诱导的脂毒性时的器官功能障碍.
- 这些发现突出显示了溶酶体功能障碍在NAFLD病变发生过程中的作用.
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