ApoA5-CIDEC轴调节MASLD中的肝脂代谢,炎症和纤维化
Chenjie Li1, Dongjie Yang2, Xiaowen Wang3
1Department of Gastroenterology, The Second Xiangya Hospital, Central South University, No.139 Middle Renmin Road, Changsha, 410011, Hunan, China.
Journal of molecular medicine (Berlin, Germany)
|December 14, 2025
概括
阿波利波蛋白A5 (ApoA5) 与脂质液滴上的CIDEC相互作用,通过减少代谢功能障碍相关的脂肪积累,炎症和纤维化在代谢功能障碍相关的脂肪性肝病 (MASLD) 中改善肝脏健康. 这种相互作用为MASLD提供了潜在的治疗点.
科学领域:
- 肝病学和代谢研究.
- 分子生物学和脂质新陈代谢
背景情况:
- 脂蛋白A5 (ApoA5) 和诱导细胞死亡的DNA分裂因子类效应因子C (CIDEC) 是肝脏脂质代谢的关键参与者.
- 这些蛋白质的失调与代谢功能障碍相关的脂肪性肝病 (MASLD) 有关.
研究的目的:
- 研究ApoA5-CIDEC相互作用在调节MASLD中的肝脂代谢,炎症和纤维化中的作用.
- 探索针对MASLD治疗的ApoA5-CIDEC轴的治疗潜力.
主要方法:
- 在不同的ApoA5表达水平下,利用C57BL/6J小鼠评估肝肥胖症,肝功能和纤维化.
- 采用共免疫沉和免疫光来确认ApoA5-CIDEC对脂质滴 (LD) 的相互作用.
- 使用HepG2细胞评估ApoA5和CIDEC对甘油三 (TG),自由脂肪酸 (FFAs),脂肪酸β-氧化 (FAO) 和新生脂质生成 (DNL) 的影响.
主要成果:
- 在小鼠中,ApoA5的过度表达改善了肝硬化症,改善了肝功能,并减少了纤维化.
- 在HepG2细胞中,ApoA5增强了FAO,并降低了TG,FFAs,DNL,ApoB分泌和促炎细胞因子分泌 (IL-6,IL-1β,TNF-α).
- ApoA5和CIDEC共同定位在LDs上,与FABP4相互作用以调节脂质代谢和炎症,ApoA5的效果由减少的CIDEC表达介导.
结论:
- ApoA5通过与CIDEC的相互作用来调节肝脂代谢,炎症和纤维化.
- ApoA5-CIDEC轴,包括其对FABP4的调节,在肝细胞功能中起着至关重要的作用.
- 针对ApoA5-CIDEC轴,为管理MASLD提供了一个有前途的新型治疗策略.
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