Southern California Research Center for ALPD and Cirrhosis, Los Angeles, CA, USA.
Department of Molecular Microbiology and Immunology, Los Angeles, CA, USA.
Adv Exp Med Biol. 2018;1032:105-113. doi: 10.1007/978-3-319-98788-0_8.
Alcohol abuse synergistically heightens the development of the third most deadliest cancer hepatocellular carcinoma (HCC) in patients infected with hepatitis C virus (HCV). Ectopically expressed TLR4 promotes liver tumorigenesis in alcohol-fed HCV Ns5a or Core transgenic mice. CD133+/CD49f + tumor-initiating stem cell-like cells (TICs) isolated from these models are tumorigenic have p53 degradation via phosphorylation of the protective protein NUMB and its dissociation from p53 by the oncoprotein TBC1D15. Nutrient deprivation reduces overexpressed TBC1D15 in TICs via autophagy-mediated degradation, suggesting a possible role of this oncoprotein in linking metabolic reprogramming and self-renewal.
酒精滥用会协同作用,加重丙型肝炎病毒 (HCV) 感染患者中第三大致命癌症——肝细胞癌 (HCC) 的发展。异位表达的 TLR4 促进了酒精喂养的 HCV Ns5a 或 Core 转基因小鼠的肝肿瘤发生。从这些模型中分离出的 CD133+/CD49f+肿瘤起始干细胞样细胞 (TICs) 具有致瘤性,通过磷酸化保护性蛋白 NUMB 及其与 p53 分离的致癌蛋白 TBC1D15 降解 p53。营养剥夺通过自噬介导的降解减少 TIC 中过表达的 TBC1D15,提示该致癌蛋白在连接代谢重编程和自我更新中可能起作用。