J Cancer 2018; 9(24):4684-4695. doi:10.7150/jca.27381 This issue

Research Paper

OIP5 Promotes Growth, Metastasis and Chemoresistance to Cisplatin in Bladder Cancer Cells

Dailian Wang1,5*, Zhicong Chen1,5*, Fan Lin3*, Ziqiang Wang1, Qunjun Gao1, Haibiao Xie1, Huizhong Xiao1, Yifan Zhou 1, Fuyou Zhang 1, Yingfei Ma4, Hongbin Mei1,5, Zhiming Cai1,2,5, Yuchen Liu1,5✉, Weiren Huang1,2,5✉

1. Department of Urology, Shenzhen Second People's Hospital, Guangzhou Medical University, Guangdong, China.
2. Carson International Cancer Center, Shenzhen University School of Medicine, Shenzhen, China
3. College of pharmacy, Guangdong Pharmaceutical University, Guangdong, China.
4. Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
5. Guangdong Key Laboratory of Systems Biology and Synthetic Biology for Urogenital Tumors, Shenzhen, China.
* The three authors contributed to this work equally.

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Wang D, Chen Z, Lin F, Wang Z, Gao Q, Xie H, Xiao H, Zhou Y, Zhang F, Ma Y, Mei H, Cai Z, Liu Y, Huang W. OIP5 Promotes Growth, Metastasis and Chemoresistance to Cisplatin in Bladder Cancer Cells. J Cancer 2018; 9(24):4684-4695. doi:10.7150/jca.27381. Available from https://www.jcancer.org/v09p4684.htm

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Opa interacting protein 5 (OIP5) has previously been identified as a tumorigenesis gene. The purpose of this study is to explore the role of OIP5 in the progression of bladder cancer (BC). The OIP5 expression and clinical behaviors in bladder cancer were collected from lager database. Our study showed that OIP5 was highly expressed in bladder cancer tissues and cells. Overexpression of OIP5 in tumor patients predicted worse overall survival (OS) and higher histological grade. Vitro and vivo experiments demonstrated that knockdown of OIP5 significantly inhibited cell growth of BC. Scratch assay and transwell assay suggested that migration capacity of BC cells was decreased after knockdown of OIP5. Cisplatin sensitivity assay indicated that depletion of OIP5 increased the sensitivity of BC cells to cisplatin. Finally, we identified 38 overlapping differentially expressed genes (DEGs) between RNA-seq and TCGA analyses which were closely linked to OIP5. Bioinformatics analysis showed that these DEGs enriched in oocyte meiosis, fanconi anemia pathway, cell cycle, and microRNAs regulation. TOP2A, SPAG5, SKA1, EXO1, TK1 were confirmed to associated with bladder cancer development. Our study suggests that OIP5 may be a potential biomarker for growth, metastasis and drug-resistance in bladder cancer.

Keywords: OIP5, bladder cancer, metastasis, cisplatin-resistance