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Feng X, Jiang Y, Xie L, Jiang L, Li J, Sun C, Xu H, Wang R, Zhou M, Zhou Y, Dan H, Wang Z, Ji N, Deng P, Liao G, Geng N, Wang Y, Zhang D, Lin Y, Ye L, Liang X, Li L, Luo G, Feng M, Fang J, Zeng X, Wang Z, Chen Q. Overexpression of proteasomal activator PA28α serves as a prognostic factor in oral squamous cell carcinoma. J Exp Clin Cancer Res 2016; 35:35. [PMID: 26892607 PMCID: PMC4759779 DOI: 10.1186/s13046-016-0309-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 02/11/2016] [Indexed: 02/05/2023] Open
Abstract
Background Despite recent advances in oral squamous cell carcinoma (OSCC) diagnosis and therapy, disease recurrence remains common and is strongly associated with mortality. It is therefore critical to identify new targets for both treatment and diagnostic purposes. We aimed at investigating the role of PA28α, a proteasomal activator in OSCC. Methods The expression of PA28α was examined in a panel of OSCC cell lines and tissues, associated with oncomine analysis. In a large OSCC patient cohort, the prognostic value of PA28α expression was evaluated. Primary clinical end points were recurrence-free and overall survival rate. Functional involvement of PA28α in OSCC was examined in both in vitro and in vivo models upon specific siRNA knockdown. Results PA28α was found to be overexpressed in OSCC cell lines and tumor tissues. High expression of PA28α was significantly associated with recurrence and poorer overall survival. Specific knockdown of PA28α inhibited OSCC cell proliferation, migration, invasion in vitro and reduced the growth of OSCC xenografts in vivo. Multivariate Cox regression analyses revealed PA28α as independent prognostic predictors. Conclusions These results suggest that PA28α is involved in OSCC oncogenesis and may serve as a potential prognostic factor. Electronic supplementary material The online version of this article (doi:10.1186/s13046-016-0309-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiaodong Feng
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Yuchen Jiang
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Liang Xie
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Lu Jiang
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Jing Li
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Chongkui Sun
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Hao Xu
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China. .,State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, China.
| | - Ruinan Wang
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Min Zhou
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Yu Zhou
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Hongxia Dan
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Zhiyong Wang
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Ning Ji
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Peng Deng
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Ga Liao
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Ning Geng
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Yun Wang
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Dunfang Zhang
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Yunfeng Lin
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Ling Ye
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Xinhua Liang
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Longjiang Li
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Gang Luo
- Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou, China.
| | - Mingye Feng
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Juan Fang
- Guangdong Provincial Key Laboratory of Oral Diseases, Stomatological Hospital, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, China.
| | - Xin Zeng
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
| | - Zhi Wang
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China. .,Guangdong Provincial Key Laboratory of Oral Diseases, Stomatological Hospital, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, China.
| | - Qianming Chen
- State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, China.
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