SOX9 enhances sorafenib resistance through upregulating ABCG2 expression in hepatocellular carcinoma.

Autor: Wang M; The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, 200433, China., Wang Z; The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, 200433, China., Zhi X; Center for Stem Cells and Medicine, Department of Cell Biology, Second Military Medical University, 800 Xiangyin Road, Shanghai, 200433, China; Orthopaedic Department, Wuhan General Hospital of PLA, #627 Wuluo Road, Wuhan, China., Ding W; The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, 200433, China., Xiong J; Department of Histology and Embryology, Second Military Medical University 800 Xiangyin Road, Shanghai, 200433, China., Tao T; The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, 200433, China., Yang Y; The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, 200433, China., Zhang H; Center for Stem Cells and Medicine, Department of Cell Biology, Second Military Medical University, 800 Xiangyin Road, Shanghai, 200433, China., Zi X; Center for Stem Cells and Medicine, Department of Cell Biology, Second Military Medical University, 800 Xiangyin Road, Shanghai, 200433, China. Electronic address: zi_xiaoyuan@163.com., Zhou W; The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, 200433, China. Electronic address: ehphwp@126.com., Huang G; The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, 200433, China. Electronic address: squaror@163.com.
Jazyk: angličtina
Zdroj: Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie [Biomed Pharmacother] 2020 Sep; Vol. 129, pp. 110315. Date of Electronic Publication: 2020 Jun 15.
DOI: 10.1016/j.biopha.2020.110315
Abstrakt: Sorafenib is a multi-kinase blocker and one of the few suggested drug treatments for aggressive hepatocellular carcinoma (HCC) patients. However, drug resistance to sorafenib may often occur over time and cause further tumor aggression. Recently, cancer stem cells were found in HCC and were speculated to be involved in tumor progression. SOX9 is highly expressed in HCC cancer stem cells and promotes cell proliferation and self-renewal. Meanwhile, HCC patients with higher SOX9 expression show poorer prognosis. Whether SOX9 is involved in sorafenib resistance in HCC is still unclear. Here, we found that sorafenib treatment increased the proportion of SOX9 positive cells in HCC cell lines. Overexpression of exogenous SOX9 in HCC increased sorafenib resistance both in vitro and in vivo, whereas down-regulation led to inhibition of sorafenib resistance. Knock-down of SOX9 by RNA interference caused down-regulation of downstream genes, including ATP binding cassette subfamily G member 2 (ABCG2). The drug resistance to sorafenib caused by SOX9 overexpression could be ameliorated by ABCG2 inhibition in HCC cell lines. In the cohort of patients taken sorafenib, we found that patients with lower SOX9 expression had more prolonged overall survival (OS) and progression-free survival (PFS). Univariate and multivariate Cox analysis shows that SOX9 expression exerts as an independent risk factor for the OS and PFS of HCC patients with sorafenib treatment. These findings demonstrate that SOX9 enhances sorafenib resistance and may regulate this process by modulating ABCG2 expression.
(Copyright © 2020. Published by Elsevier Masson SAS.)
Databáze: MEDLINE
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