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PPP5C promotes cell proliferation and survival in human prostate cancer by regulating of the JNK and ERK1/2 phosphorylation

Authors Lv JM, Chen L, Gao Y, Huang H, Pan XW, Liu X, Chen M, Qu FJ, Li L, Wang JK, Cui XG, Xu DF

Received 2 January 2018

Accepted for publication 9 June 2018

Published 12 September 2018 Volume 2018:11 Pages 5797—5809


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 5

Editor who approved publication: Prof. Dr. Jianmin Xu

Jian-Min Lv,1–3,* Lu Chen,1,* Yi Gao,1,* Hai Huang,1–3,* Xiu-Wu Pan,2,3,* Xi Liu,1 Ming Chen,2 Fa-Jun Qu,3 Lin Li,3 Jun-Kai Wang,2 Xin-Gang Cui,3,4,* Dan-Feng Xu1,*

1Department of Urinary Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China; 2Department of Urinary Surgery, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China; 3Department of Urinary Surgery, Third Affiliated Hospital, Second Military Medical University, Shanghai 201805, China; 4Department of Urinary Surgery, Gongli Hospital, Second Military Medical University, Shanghai 200135, China

*These authors contributed equally to this work

Background: Prostate cancer (PCa) is one of the most common malignancies and a major leading cause of cancer-related deaths in males. And it is necessary to explore new molecular targets to enhance diagnosis and treatment level of the PCa. Serine/threonine protein phosphatase 5 (PPP5C) is a vital molecule that Involve in complex cell physiological activity.
Purpose: The objective of this study was to detecte the expression level of PPP5C in the tissue of prostate cancer patients and further discussed the PPP5C biological function and mechanisms on the PCa.
Methods: The expression level of PPP5C was analyzed by immunohistochemistry and ONCOMINE datasets. Lentivirus-mediated short hairpin RNA (shRNA) was constructed to silence the expression of PPP5C in prostate cancer cell. Cell viability and proliferation were measured using MTT and colony formation, and the cell cycle and apoptosis was analyszed by flow cytometry. The changes of downstream protein level and protein phosphorylation level were detected by western blot.
Results: PPP5C was highly expressed in PCa tissue as analyzed by immunohistochemistry and ONCOMINE datasets. PPP5C Knockdown inhibited cell proliferation and colony formation in PCa cells. Flow cytometry analysis showed that DU145, PC3 and 22RV1 PCa cells deprived of PPP5C were arrested in G0/G1 phase and became apoptotic. Western blot analysis indicated that PPP5C knockdown could promote JNK and ERK phosphorylation.
Conclusion: Our study indicated that the PPP5C may become a new potential diagnostic biomarker and therapeutic target for the PCa.

Keywords: PPP5C, prostate cancer, tumorigenesis, JNK, ERK

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