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STC2 as a novel mediator for Mus81-dependent proliferation and survival in hepatocellular carcinoma
- Source :
- Cancer letters. 388
- Publication Year :
- 2016
-
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.
- Subjects :
- 0301 basic medicine
MAPK/ERK pathway
Cancer Research
Carcinoma, Hepatocellular
DNA repair
Adenomatous polyposis coli
Mice, Nude
Apoptosis
Biology
Small hairpin RNA
03 medical and health sciences
Mice
0302 clinical medicine
PTEN
Animals
Humans
Cell Proliferation
Glycoproteins
Gene knockdown
Cell growth
Liver Neoplasms
Molecular biology
Survival Analysis
digestive system diseases
030104 developmental biology
Oncology
030220 oncology & carcinogenesis
biology.protein
Intercellular Signaling Peptides and Proteins
Signal Transduction
Subjects
Details
- ISSN :
- 18727980
- Volume :
- 388
- Database :
- OpenAIRE
- Journal :
- Cancer letters
- Accession number :
- edsair.doi.dedup.....759a5166d236186be9126f6208840f67