乙-固醇通过向RAC1/mTOR/TFEB轴,从而激活脂质酶体-溶酶体通路来改善与代谢功能障碍相关的脂肪肝炎
Yang Wang1, Yi Sun1, Chang-Yuan Wang1
1Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian, 116044, China.
Acta pharmacologica Sinica
|January 7, 2026
概括
β-Sitosterol (β-SIT) 通过增强脂质酶体-溶酶体通路,有效地治疗与代谢功能障碍相关的脂肪肝炎 (MASH). 这种天然化合物向RAC1-mTOR-TFEB轴,以恢复细胞功能并减轻MASH的进展.
科学领域:
- 肝病学和代谢性疾病.
- 细胞生物学和信号通路
- 自然产品药理学 自然产品药理学
背景情况:
- 代谢功能障碍相关的脂肪肝炎 (MASH) 是一种严重的肝脏疾病,由炎症和脂质积累驱动.
- 功能障碍性脂质,即通过溶酶体降解脂质滴的过程,是MASH进展的关键因素.
- 准脂质酶体-溶酶体通路为MASH提供了一个有前途的治疗途径.
研究的目的:
- 研究β-Sitosterol (β-SIT) 在治疗MASH中的治疗潜力.
- 阐明β-SIT在MASH中对脂质酶体-溶解体通路的作用的潜在分子机制.
- 探索β-SIT对RAC1-mTOR-TFEB信号轴的影响.
主要方法:
- 已建立的MASH小鼠模型使用胆缺乏,L-氨基酸定义的高脂肪饮食 (CDAHFD) 或高脂肪饮食 (HFD).
- 在体外模型中使用FFA刺激的AML-12细胞来模拟脂质过载.
- 采用的技术包括传输电子显微镜,多SIM成像,生物信息学,分子动力学,CETSA,共免疫沉和生物化学分析.
主要成果:
- 在体内和体内,β-SIT治疗剂量依赖地通过增强脂质和溶酶体功能来缓解MASH症状.
- 在FFA治疗的细胞中,β-SIT激活了自流,促进了溶酶体生物发生,并改善了溶酶体-脂质滴滴相互作用.
- 通过直接准RAC1,β-SIT抑制了mTOR通路的激活,促进了TFEB核转位和恢复脂质.
结论:
- β-SIT通过增强脂质酶体-溶酶体通路,证明了MASH的显著治疗潜力.
- 这种新的机制涉及β-SIT准RAC1-mTOR-TFEB轴以修复脂-溶酶体缺陷.
- β-SIT成为MASH治疗的有希望的天然化合物候选者.
相关概念视频
Lipid-Lowering Drugs: Statins and Miscellaneous Agents
1.3K
Hyperlipidemia, a medical condition often referred to as high cholesterol, is characterized by abnormally elevated levels of lipids in the bloodstream. When present in excess, these lipids, specifically cholesterol and triglycerides, can lead to serious health complications, often involving cardiovascular diseases. Illnesses like atherosclerosis, heart attacks, and pancreatitis have all been linked to untreated hyperlipidemia. This means controlling and regulating cholesterol and triglyceride...
1.3K
PI3K/mTOR/AKT Signaling Pathway
5.3K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
5.3K


