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Journal of Experimental & Clinical Cancer Research

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Open Access 01-12-2017 | Research

Platinum-containing compound platinum pyrithione suppresses ovarian tumor proliferation through proteasome inhibition

Authors: Hongbiao Huang, Ni Liu, Yuning Liao, Ningning Liu, Jianyu Cai, Xiaohong Xia, Zhiqiang Guo, Yanling Li, Qirong Wen, Qi Yin, Yan Liu, Qingxia Wu, Dhivya Rajakumar, Xiujie Sheng, Jinbao Liu

Published in: Journal of Experimental & Clinical Cancer Research | Issue 1/2017

Abstract

Background

Ovarian carcinoma is one of the most aggressive gynecological malignant neoplasms and makes up 25–30% of all cancer cases of the female genital tract. Currently, resistance to traditional chemotherapy is a great challenge for patients with Epithelial ovarian cancer (EOC). Therefore, identifying novel agents for EOC treatment is essential and urgent.

Method

MTS assay was used to analyze the cell viability and proliferation of cancer cells. Flow cytometry was employed to analyze cell cycle distribution and cell apoptosis. Protein signaling pathways were detected by western blot and immunohistochemical staining. Nude mouse experiment was performed to test the in vivo effect of platinum pyrithione (PtPT).

Results

PtPT is a chemically well-characterized synthetic complex of platinum that potently inhibits proteasome-associated deubiquitinases USP14 and UCHL5 activity and shows selective cytotoxicity to multiple cancer cells without damaging DNA. We found that PtPT significantly accumulated ubquitinated-proteins and suppressed the proliferation of multiple EOC cells. Additionally, PtPT induced G2 phase arrest and apoptosis in both A2780 and SKOV3 cells. More importantly, animal experiments showed that PtPT dramatically suppressed the growth of EOC xenografts without obvious side effects.

Conclusion

These results suggest that through proteasome inhibition, PtPT significantly suppressed the proliferation of EOC in vitro and in vivo and could be developed as a novel agent for EOC treatment in the future.

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Title: Platinum-containing compound platinum pyrithione suppresses ovarian tumor proliferation through proteasome inhibition
Authors: Hongbiao Huang
Ni Liu
Yuning Liao
Ningning Liu
Jianyu Cai
Xiaohong Xia
Zhiqiang Guo
Yanling Li
Qirong Wen
Qi Yin
Yan Liu
Qingxia Wu
Dhivya Rajakumar
Xiujie Sheng
Jinbao Liu
Publication date: 01-12-2017
Publisher: BioMed Central
Published in: Journal of Experimental & Clinical Cancer Research / Issue 1/2017
Electronic ISSN: 1756-9966
DOI: https://doi.org/10.1186/s13046-017-0547-8

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