肝脏腺A1受体的激活通过抑制SREBPs成熟来改善MASH
Weize Zhu1, Ying Hong1, Zhaowei Tong2
1School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
代谢功能障碍相关的脂肪肝炎 (MASH) 是一种严重的肝脏疾病. 激活肝脏中的腺A1受体 (A1R) 有助于减少脂肪积累和炎症,这表明A1R是潜在的治疗点.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 分子生物学分子生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 代谢功能障碍相关的脂肪肝炎 (MASH) 是代谢功能障碍相关的脂肪肝疾病 (MAFLD) 的晚期阶段,没有批准的治疗方法.
- 氨酸A1受体 (A1R) 在肝脏生理学和MAFLD病变发生中的作用尚不清楚.
研究的目的:
- 调查肝脏腺A1受体 (A1R) 在饮食诱导的代谢相关脂肪肝 (MAFL) 和MASH的发展和进展中的作用.
- 探索A1R影响肝脂代谢和炎症的潜在分子机制.
主要方法:
- 使用了具有肝脏特异性A1R枯竭或过度表达的转基因小鼠.
- 使用高脂肪饮食 (HFD) 诱导MAFL/MASH模型.
- 采用分子生物学技术来分析蛋白质相互作用,基因表达和脂质生成途径.
- 在临床前模型中研究了A1R激动剂的治疗潜力.
主要成果:
- 肝脏特异性的A1R耗尽加剧了饮食引起的MAFL/MASH,而A1R过度表达减弱了它.
- A1R激活促进了SCAP与SQSTM1的结合,抑制了SCAP降解,随后抑制了新的脂质生成和炎症.
- 在人类MAFL/MASH患者和HFD养小鼠中观察到肝脏A1R表达升高,表明补偿性适应性反应.
- A1R激动剂在以A1R依赖的方式减轻MAFL/MASH方面表现出治疗疗效.
结论:
- 肝脏A1R对MAFL/MASH的发展和进展起着保护作用.
- A1R激活通过一种涉及SCAP/SQSTM1相互作用的新机制抑制脂生和炎症.
- 针对肝脏A1R是MAFL/MASH治疗的一个有前途的治疗策略.
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