线粒体丙酮酸载体抑制剂在代谢相关脂肪性肝炎治疗中的应用前景
DOI: 10.12449/JCH260424
Application prospects of mitochondrial pyruvate carrier inhibitors in treatment of metabolic dysfunction-associated steatohepatitis
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摘要: 代谢相关脂肪性肝炎(MASH)是一种复杂的肝脏疾病,其病理特征是肝脏中脂肪异常累积,伴随炎症和肝细胞损伤,可逐渐发展为肝纤维化、肝硬化甚至肝癌。MASH的发病机制复杂,涉及胰岛素抵抗、脂肪从头合成(DNL)增加、氧化应激和线粒体功能障碍等多个环节。近年来,线粒体丙酮酸载体(MPC)作为调控脂质代谢的关键分子靶点备受关注。本文系统综述了MPC在MASH中的作用机制,重点探讨抑制MPC表达如何通过减少DNL生成并调控腺苷一磷酸活化的蛋白质激酶-乙酰辅酶A羧化酶等信号通路来调节脂质合成代谢,最终改善肝脏炎症。此外,本文展望了MPC抑制剂在MASH治疗中的潜在应用前景,以期为未来治疗MASH的临床研究提供新的思路。Abstract: Metabolic dysfunction-associated steatohepatitis (MASH) is a complex liver disease characterized by abnormal fat accumulation in the liver, accompanied by inflammation and hepatocyte injury, and it can gradually progress to liver fibrosis, liver cirrhosis, and even hepatocellular carcinoma. MASH has a complex pathogenesis involving multiple links such as insulin resistance, de novo lipogenesis (DNL), oxidative stress, and mitochondrial dysfunction. In recent years, mitochondrial pyruvate carrier (MPC) has attracted wide attention as a key molecular target for regulating lipid metabolism. This article systematically reviews the mechanism of action of MPC in MASH, with a focus on how inhibiting MPC expression regulates lipid synthesis and metabolism by reducing DNL production and modulating signaling pathways such as AMPK-ACC, thereby improving liver inflammation. In addition, this article discusses the potential application prospects of MPC inhibitors in MASH treatment, in order to provide new ideas for future clinical research on MASH management.
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注: IR,胰岛素抵抗;DNL,脂肪从头合成;ACC,乙酰辅酶A羧化酶;FASN,脂肪酸合成酶;MPC,线粒体丙酮酸载体;ChREBP,碳水化合物反应元件结合蛋白;α-SMA,α-平滑肌肌动蛋白;ATP,腺苷三磷酸;AMP,腺苷一磷酸;AMPK,AMP活化的蛋白质激酶;mTORC1,雷帕霉素靶蛋白复合物1;SREBP-1c,甾醇调节元件结合蛋白-1c;Malonyl-CoA,丙二酰辅酶A;CPT1A,肉毒碱棕榈酰转移酶1A;MASH,代谢相关脂肪性肝炎。
图 1 MPC抑制剂治疗MASH的分子机制
Figure 1. The molecular mechanism of MPC inhibitors in treating MASH
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