title: STC2 as a novel mediator for Mus81-dependent proliferation and survival in hepatocellular carcinoma.
abstract: Methyl methansulfonate and UV sensitive gene clone 81 (Mus81) is a critical DNA repair gene that has been implicated in development of several cancers including hepatocellular carcinoma (HCC). However, whether Mus81 can affect proliferation and survival of HCC remains unknown. In the present study, we demonstrated that the knockdown of Mus81 was associated with suppressed proliferation and elevated apoptosis of HCC cells in vitro and in vivo. Multilayered screenings, including DNA microarray, high content screen, and real-time PCR validation, identified STC2 as a proliferation-facilitating gene significantly down-regulated in HCC cells upon Mus81 knockdown. STC2 expression was also closely correlated to Mus81 expression in HCC tissues. More importantly, the restoration of STC2 expression recovered the compromised cell proliferation and survival in Mus81 depleted HCC cells. Furthermore, Mus81 knockdown was associated with the activation of APAF1, APC, and PTEN pathways and concurrent inhibition of MAPK pathway through decreasing STC2 expression. In conclusion, Mus81 knockdown suppresses proliferation and survival of HCC cells likely by downregulating STC2 expression, implicating Mus81 as a therapeutic target for HCC.
authors.affiliation: Department of Hepatobiliary Surgery, Guangzhou Red Cross Hospital, Medical College, Jinan University, Tongfu Road 396, Guangzhou 510220, China. Electronic address: fan_woo@hotmail.com.
authors.forename: Fan
authors.initials: F
authors.lastname: Wu
authors.affiliation: Department of Hepatobiliary Surgery, Guangzhou Red Cross Hospital, Medical College, Jinan University, Tongfu Road 396, Guangzhou 510220, China.
authors.forename: Ting-Yue
authors.initials: TY
authors.lastname: Li
authors.affiliation: Department of Hepatobiliary Surgery, Guangzhou Red Cross Hospital, Medical College, Jinan University, Tongfu Road 396, Guangzhou 510220, China.
authors.forename: Shu-Chao
authors.initials: SC
authors.lastname: Su
authors.affiliation: Department of Hepatobiliary Surgery, Guangzhou Red Cross Hospital, Medical College, Jinan University, Tongfu Road 396, Guangzhou 510220, China.
authors.forename: Ji-Shang
authors.initials: JS
authors.lastname: Yu
authors.affiliation: Department of Hepatobiliary Surgery, Guangzhou Red Cross Hospital, Medical College, Jinan University, Tongfu Road 396, Guangzhou 510220, China.
authors.forename: Hao-Lu
authors.initials: HL
authors.lastname: Zhang
authors.affiliation: Department of Hepatobiliary Surgery, Guangzhou Red Cross Hospital, Medical College, Jinan University, Tongfu Road 396, Guangzhou 510220, China.
authors.forename: Guo-Qian
authors.initials: GQ
authors.lastname: Tan
authors.affiliation: Department of Hepatobiliary Surgery, Guangzhou Red Cross Hospital, Medical College, Jinan University, Tongfu Road 396, Guangzhou 510220, China.
authors.forename: Jian-Wei
authors.initials: JW
authors.lastname: Liu
authors.affiliation: Department of Hepatobiliary Surgery, Guangzhou Red Cross Hospital, Medical College, Jinan University, Tongfu Road 396, Guangzhou 510220, China.
authors.forename: Bai-Lin
authors.initials: BL
authors.lastname: Wang
mesh_terms: D000818:Animals; D017209:Apoptosis; D006528:Carcinoma, Hepatocellular / Q000401:mortality / Q000473:pathology; D049109:Cell Proliferation; D006023:Glycoproteins / Q000235:genetics*; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000235:genetics*; D008113:Liver Neoplasms / Q000401:mortality / Q000473:pathology; D051379:Mice; D008819:Mice, Nude; D015398:Signal Transduction; D016019:Survival Analysis
chemical_list: D006023:Glycoproteins; D036341:Intercellular Signaling Peptides and Proteins; C114997:STC2 protein, human
keywords: Apoptosis; Hepatocellular carcinoma; Mus81; Proliferation; STC2