中药通过调控肝脏巨噬细胞防治非酒精性脂肪性肝病的研究进展
Research progress of the protection provided by traditional Chinese medicine on non-alcoholic fatty liver disease via regulating liver macrophages
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摘要: 非酒精性脂肪性肝病(non-alcoholic fatty liver disease, NAFLD) 是指除酒精和其他明确损肝因素所致的肝细胞内脂质过度沉积为主要特征的临床病理综合征。NAFLD发病机制复杂, 当肝脏受到损伤时, 肝细胞内的脂质大量沉积, 刺激肝细胞发生氧化应激、内质网应激和代谢失调等反应, 免疫细胞进一步过度分泌炎性细胞因子释放入血引起全身炎症, 因此在NAFLD的进程中, 炎症反应扮演了重要的角色。巨噬细胞是肝脏内含量最丰富的免疫细胞, 在肝脏炎症损伤中发挥重要的作用。肝脏巨噬细胞包括肝脏固有和单核细胞来源的巨噬细胞, 其活化和极化过程参与NAFLD不同发展阶段。中药复方及其活性成分已被证实可调控巨噬细胞参与NAFLD病变中的炎症、损伤和恢复过程。根据现有的研究报道, 本文以阐述巨噬细胞的来源、活化、极化及其与NAFLD的关系为切入点, 系统综述中医药通过调控巨噬细胞活化、募集和极化, 从而防治NAFLD的药效机制, 以期为从中药中发现通过调控巨噬细胞防治NAFLD的创新性药物提供新的研究思路。Abstract: Non-alcoholic fatty liver disease (NAFLD) is a pathological syndrome characterized by the excessive deposition of lipids in hepatocytes but not caused by alcohol and other definite liver damage factors. The pathogenesis of NAFLD is complex. When the liver is damaged, a large amount of lipids deposited in hepatocytes will induce oxidative stress injury, endoplasmic reticulum stress and metabolic disorders in hepatocytes, and immune cells further secrete inflammatory cytokines and release them into the blood, causing systemic inflammation. In the process of NAFLD, the inflammatory response plays an important role. Macrophages are the most abundant non-parenchymal cells in the liver and play an important role in liver inflammatory injury. Hepatic macrophages include liver-native and monocyte-derived macrophages, and their activation and polarization processes are involved in the different development stages of NAFLD. Traditional Chinese medicine (TCM) compound and its active compounds have been found to regulate macrophages to participate in the process of inflammation, injury and recovery of NAFLD. Based on the existing research reports, this paper elaborates the relationship between the source, activation and polarization of macrophages and NAFLD as the breakthrough point, and systematically reviews the mechanism of TCM in the prevention and treatment of NAFLD by regulating the activation, recruitment and polarization of macrophages. This paper aims to provide new ideas for the discovery of novel NAFLD candidate drugs from TCM via targeting macrophages.
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