巨细胞中的胆固醇过载通过抑制小鼠的7-脱胆固醇减少酶驱动了与代谢功能障碍相关的脂肪肝炎
Xiaoxiao Li1, Kai Wang2, Yunhong Sun1,3
1Institute of Digestive Diseases, Shanghai University of Traditional Chinese Medicine, 725 South Wanping Road, Shanghai, 200032, China.
Journal of translational medicine
|November 29, 2024
概括
饮食中的胆固醇驱动了与代谢功能障碍相关的脂肪肝炎 (MASH). 在巨细胞中准7-脱胆固醇减少酶 (DHCR7) 通过减少炎症为MASH提供了潜在的治疗策略.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 免疫学 免疫学 免疫学
- 代谢疾病 代谢疾病
背景情况:
- 饮食中的胆固醇会加剧与代谢功能障碍相关的脂肪肝炎 (MASH).
- 肝脏巨细胞在MASH病变发生过程中起着至关重要的作用.
- 链接胆固醇载荷巨细胞与MASH进展的机制尚未完全理解.
研究的目的:
- 阐明胆固醇在巨细胞两极分化和MASH中的作用.
- 为了确定参与MASH中胆固醇介导炎症的关键分子参与者.
- 探索DHCR7作为MASH的潜在治疗点.
主要方法:
- 给小鼠提供高脂肪饮食以诱导MASH.
- 在体外和体外模型中评估了巨细胞极化和炎症.
- 在巨细胞中评估了7-脱胆固醇还原酶 (DHCR7) 功能.
- 在功能性研究中使用了骨髓细胞特异性DHCR7淘汰赛小鼠.
- RNA测序确定了受影响的信号通路.
主要成果:
- 胆固醇过载诱导了促炎性巨细胞分化 (M1) 和肝炎.
- 在MASH巨细胞中,DHCR7的表达被降低了,其抑制促进了炎症.
- DHCR7的过度表达显示出抗炎作用.
- 骨髓特异性DHCR7缺乏症加剧了MASH.
- 鉴定出DHCR7-PI3K轴在减轻胆固醇驱动的炎症方面至关重要.
结论:
- DHCR7对胆固醇诱导的MASH具有保护作用.
- 向巨细胞DHCR7激活为MASH提供了一个新的治疗途径.
- DHCR7调制提供了一种有希望的策略来对抗MASH的进展.
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