酒精性肝病中细胞内 Wnt/β-catenin 信号转导的分子机制研究进展
Molecular insights on intracellular Wnt/β-catenin signaling in alcoholic liver disease.
机构信息
Department of Pharmacology, Hepatology & Molecular Medicine Lab, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, Tamil Nadu, India.
Animal House Division, CSIR-Central Leather Research Institute, Chennai, India.
出版信息
Cell Biochem Funct. 2024 Jan;42(1):e3916. doi: 10.1002/cbf.3916.
Alcoholic liver disease (ALD) is one of the most common health problems worldwide, especially in developing countries caused by chronic consumption of alcohol on a daily basis. The ALD spectrum is initiated with the early stages of alcoholic fatty liver (steatosis), progressing to alcoholic steatohepatitis, followed by the later stages of fibrosis and in some cases, cirrhosis and hepatocellular carcinoma (HCC). The Wnt/β-catenin signaling required for healthy liver development, function, and regeneration is found to be aberrated in ALD, attributed to its progression. This review is to elucidate the association of Wnt/β-catenin signaling with various stages of ALD progression. Alcohol causes downregulation of Wnt/β-catenin signaling components and thereby suppressing the pathway. Reports have been published that aberrated Wnt/β-catenin signaling, especially the absence of β-catenin, results in decreased alcohol metabolism, causing steatosis followed by steatohepatitis via lipid accumulation, lipid peroxidation, liver injury, increased oxidative stress and apoptosis of hepatocytes, contributing to the advancement of ALD. Contrastingly, the progression of later stages of ALD like fibrosis and HCC depends on the increased activation of Wnt/β-catenin signaling and its components. Existing studies reveal the varied expression of Wnt/β-catenin signaling in ALD. However, the dual role of the Wnt/β-catenin pathway in earlier and later stages of ALD is not clear. Therefore, studies on the Wnt/β-catenin pathway and its components in various manifestations of ALD might provide insight in targeting the Wnt/β-catenin pathway in ALD treatment.
酒精性肝病 (ALD) 是全球最常见的健康问题之一,尤其在发展中国家更为普遍,其病因是长期、每日摄入酒精。ALD 的发病谱始于酒精性脂肪肝(脂肪变性)的早期阶段,进展为酒精性肝炎,随后是纤维化的晚期阶段,在某些情况下还会进展为肝硬化和肝细胞癌 (HCC)。在健康的肝脏发育、功能和再生过程中需要 Wnt/β-catenin 信号,但在 ALD 中发现该信号会发生异常,这也是其进展的原因之一。本综述旨在阐明 Wnt/β-catenin 信号与 ALD 进展的各个阶段之间的关系。酒精会导致 Wnt/β-catenin 信号通路的下调,从而抑制该通路。已有报道表明,异常的 Wnt/β-catenin 信号,特别是 β-catenin 的缺失,会导致酒精代谢减少,引起脂肪变性,随后通过脂质积累、脂质过氧化、肝损伤、氧化应激增加和肝细胞凋亡导致肝炎,从而促进 ALD 的进展。相反,ALD 后期纤维化和 HCC 等阶段的进展则依赖于 Wnt/β-catenin 信号及其组成部分的过度激活。现有研究揭示了 Wnt/β-catenin 信号在 ALD 中的不同表达。然而,Wnt/β-catenin 通路在 ALD 早期和晚期的双重作用尚不清楚。因此,研究 Wnt/β-catenin 通路及其在 ALD 不同表现中的组成部分可能有助于深入了解在 ALD 治疗中靶向该通路的方法。