GABARAPL1缺失赋予肝细胞癌干细胞样细胞铁死亡抵抗性的机制研究

Abstract

Cancer stem-like cells (CSLC) are considered a major contributor to the development and progression of hepatocellular carcinoma (HCC). Previous studies indicated that CSLC are characterized by resistance to ferroptosis, a type of lipid peroxidation-dependent cell death. Here, we identified a set of ferroptosis-related stemness genes (FRSG) and found that these genes may be involved in immune infiltration in HCC. A four-FRSG ( CDKN2A , GABARAPL1 , HRAS , RPL8 ) risk model with prognostic prediction was constructed by a Cox analysis in HCC. Among these four genes, GABARAPL1 was downregulated in HCC tumor-repopulating cells (TRC; a type of CSLC). Its downregulation decreased the sensitivity of HCC TRC to erastin- or sorafenib-triggered ferroptosis. Together, we uncovered a molecular mechanism via which CSLC could achieve tolerance to ferroptosis. Further studies may provide potential therapeutic strategies targeting CSLC in HCC.