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高原缺氧应激与肝细胞癌研究进展

Research Advances in the Roles of High-Altitude Hypoxic Stress in Hepatocellular Carcinoma

  • 摘要: 肝细胞癌是全球常见且致死率高的恶性肿瘤之一,在我国的疾病负担尤为严重。世居高原地区的居民肝细胞癌的发病率和死亡率相较平原地区居民低,这可能归因于世居高原地区居民对缺氧应激产生适应性进化。高原缺氧应激与肝细胞癌发生发展相关,缺氧应激可通过调控肝癌细胞的衰老、死亡、代谢、肿瘤微环境和肿瘤免疫等方面参与肝细胞癌的发生发展。此外,最新临床证据显示高原缺氧环境对肝细胞癌切除术后的肝再生也具有重要影响。然而,关于高原缺氧应激在肝细胞癌的发展中是起促进作用还是抑制作用,目前仍存在争议。本文从世居高原地区居民对高原缺氧应激的适应性进化对肝细胞癌发生发展的影响,缺氧对肝癌细胞衰老、死亡、肿瘤微环境、肿瘤代谢和肿瘤免疫的影响,高原缺氧应激对肝细胞癌切除术后肝再生的影响三个方面讨论氧浓度,细胞背景和组织微环境的不同对肝细胞癌发生发展的影响,以及研究高原缺氧应激机制在优化肝细胞癌治疗中的潜在应用。

     

    Abstract: Hepatocellular carcinoma (HCC), one of the most prevalent malignant tumors causing the highest mortality globally, imposes an especially heavy burden of disease in China. Individuals living in high-altitude areas have a lower incidence of and mortality resulting from HCC compared with those in low-altitude regions do, potentially due to adaptive evolution in responses to hypoxic stress. Notably, high-altitude hypoxic stress is associated with the development and progression of HCC. Hypoxic stress may be involved in the development and progression of HCC by modulating the senescence, apoptosis, metabolism, tumor microenvironment, and tumor immunity of HCC cells. Additionally, the latest clinical findings indicate that high-altitude hypoxic environment has a significant impact on liver regeneration after HCC resection surgery. However, there is still a debate going on regarding whether high-altitude hypoxic stress promotes or inhibits the progression of HCC. This review covers three main aspects, the impact of adaptive evolution to high-altitude hypoxic stress on the development and progression of HCC in long-term residents of high-altitude areas, the effects of high-altitude hypoxic stress on the senescence, apoptosis, metabolism, tumor microenvironment, tumor metabolism, and tumor immunity of HCC cells, and the effect of high-altitude hypoxic stress on liver regeneration after HCC resection. We discussed the effect of changes in oxygen concentrations, cellular context, and tissue microenvironment on HCC development and progression. Moreover, we highlighted the potential for using research findings on mechanisms underlying high-altitude hypoxic stress to optimize HCC treatment strategies.

     

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