Institute of Regenerative and Reconstructive Medicine, Med-X Institute, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
National Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
Front Immunol. 2023 Feb 16;14:1131588. doi: 10.3389/fimmu.2023.1131588. eCollection 2023.
Hepatic fibrosis is often secondary to chronic inflammatory liver injury. During the development of hepatic fibrosis, the damaged hepatocytes and activated hepatic stellate cells (HSCs) caused by the pathogenic injury could secrete a variety of cytokines and chemokines, which will chemotactic innate and adaptive immune cells of liver tissue and peripheral circulation infiltrating into the injury site, mediating the immune response against injury and promoting tissue reparation. However, the continuous release of persistent injurious stimulus-induced inflammatory cytokines will promote HSCs-mediated fibrous tissue hyperproliferation and excessive repair, which will cause hepatic fibrosis development and progression to cirrhosis even liver cancer. And the activated HSCs can secrete various cytokines and chemokines, which directly interact with immune cells and actively participate in liver disease progression. Therefore, analyzing the changes in local immune homeostasis caused by immune response under different pathological states will greatly enrich our understanding of liver diseases' reversal, chronicity, progression, and even deterioration of liver cancer. In this review, we summarized the critical components of the hepatic immune microenvironment (HIME), different sub-type immune cells, and their released cytokines, according to their effect on the development of progression of hepatic fibrosis. And we also reviewed and analyzed the specific changes and the related mechanisms of the immune microenvironment in different chronic liver diseases.Moreover, we retrospectively analyzed whether the progression of hepatic fibrosis could be alleviated by modulating the HIME.We aimed to elucidate the pathogenesis of hepatic fibrosis and provide the possibility for exploring the therapeutic targets for hepatic fibrosis.
肝纤维化通常是慢性炎症性肝损伤的结果。在肝纤维化的发展过程中,致病损伤引起的受损肝细胞和活化的肝星状细胞(HSCs)可分泌多种细胞因子和趋化因子,趋化肝组织和外周循环中的固有和适应性免疫细胞浸润到损伤部位,介导针对损伤的免疫反应并促进组织修复。然而,持续释放持续性损伤刺激诱导的炎症细胞因子会促进 HSCs 介导的纤维组织过度增殖和过度修复,从而导致肝纤维化的发展和进展,甚至导致肝硬化和肝癌。活化的 HSCs 可分泌各种细胞因子和趋化因子,直接与免疫细胞相互作用,并积极参与肝病的进展。因此,分析不同病理状态下免疫反应引起的局部免疫稳态变化将极大地丰富我们对肝病逆转、慢性化、进展甚至肝癌恶化的认识。在这篇综述中,我们根据它们对肝纤维化发展和进展的影响,总结了肝免疫微环境(HIME)的关键组成部分、不同亚群免疫细胞及其释放的细胞因子。我们还回顾和分析了不同慢性肝病中免疫微环境的具体变化及其相关机制。此外,我们还回顾性分析了调节 HIME 是否可以减轻肝纤维化的进展。我们旨在阐明肝纤维化的发病机制,并为探索肝纤维化的治疗靶点提供可能性。
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