在LXRα/SREBP1c信号通路中,GCN5驱动着MASLD的进展,通过LXRα/SREBP1c信号通路介导新的脂质生成
Hai-Tao Xiao1, Peng Song2, Jing Jin1
1State Key Laboratory of Natural Medicines, Department of Pharmacognosy, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, China.
Nature communications
|February 16, 2026
概括
一般控制非抑制蛋白5 (GCN5) 通过促进脂肪合成,驱动代谢功能障碍相关的脂肪性肝病 (MASLD) 的进展. 用CPTH2抑制GCN5显示了对MASLD的治疗潜力.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 肝病学 肝病学是一种肝病学.
背景情况:
- 与代谢功能障碍相关的脂肪性肝病 (MASLD) 影响着全球人口的很大一部分.
- 在MASLD病变发生过程中,基因组乙转移酶一般控制非抑制蛋白5 (GCN5) 的作用尚不清楚.
研究的目的:
- 研究GCN5在MASLD进展中的作用.
- 探索GCN5作为MASLD的潜在治疗点.
主要方法:
- 使用了人类和雄性小鼠MASLD模型.
- 研究了肝细胞中GCN5过度表达和消去的影响.
- 使用药理学GCN5抑制剂CPTH2.2.
- 进行了代谢和RNA测序 (RNA-seq).
- 在SREBP1c促销物中研究了质子修饰.
主要成果:
- GCN5,而不是PCAF,驱动着渐进的MASLD.
- 过度表达GCN5会加剧MASLD;切除GCN5可以缓解MASLD.
- CPTH2治疗可以预防MASLD.
- GCN5通过通过基因素H3乙化上调调节SREBP1c转录来促进新生脂质生成 (DNL).
- GCN5是LXRα诱导的SREBP1c表达的关键调节者.
- 结合LXR激动剂和CPTH2治疗协同减少了肝脂积累.
结论:
- GCN5是MASLD进展的关键驱动因素.
- 准GCN5可以选择性地抑制SREBP1c驱动的DNL.
- 结合GCN5抑制和LXR激活,为MASLD提供了一个有希望的治疗策略.
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