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Wang J, Zhang N, Peng M, Hua X, Huang C, Tian Z, Xie Q, Zhu J, Li J, Huang H, Huang C. p85α Inactivates MMP-2 and Suppresses Bladder Cancer Invasion by Inhibiting MMP-14 Transcription and TIMP-2 Degradation. Neoplasia 2019; 21:908-920. [PMID: 31401412 PMCID: PMC6700442 DOI: 10.1016/j.neo.2019.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/18/2019] [Accepted: 07/18/2019] [Indexed: 02/06/2023]
Abstract
Recent studies show p85α up-regulates epidermal growth factor (EGF) receptor, thereby promoting malignant cell transformation and migration in normal mouse embryonic fibroblasts (MEFs). However, the potential role of p85α in human bladder cancer (BC) remains unknown. Here, we show that p85α is down-regulated in BC tumor tissues. Ectopic expression of p85α inhibited cell invasion, but not migration, whereas p85α knockdown promoted invasion in BC cells, revealing that p85α inhibits BC invasion. Overexpression of kinase-deficient p110 in T24 T(p85α) cells inhibited BC cell migration, but not invasion, suggesting that the inhibition of p85α on invasion is independent of PI3K activity. The effect of p85α on inhibiting BC invasion was mediated by the inactivation of MMP-2 concomitant with the up-regulation of TIMP-2 and down-regulation of MMP-14. Mechanistic studies revealed c-Jun inactivation was associated with p85α knockdown-induced MMP-14 expression, and down-regulated miR-190, leading to ATG7 mRNA degradation. This suppressed the autophagy-dependent removal of TIMP-2 in human BC cells. The present results identify a novel function of p85α and clarify the mechanisms underlying its inhibition of BC invasion, providing insight into the role of p85α in normal and cancer cells.
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Affiliation(s)
- Jingjing Wang
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Key Laboratory of Laboratory Medicine, Ministry of Education, China, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China 325035
| | - Ning Zhang
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Key Laboratory of Laboratory Medicine, Ministry of Education, China, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China 325035
| | - Minggang Peng
- Department of Environmental Medicine, New York University School of Medicine, New York, NY 10010, USA
| | - Xiaohui Hua
- Department of Environmental Medicine, New York University School of Medicine, New York, NY 10010, USA
| | - Chao Huang
- Department of Environmental Medicine, New York University School of Medicine, New York, NY 10010, USA
| | - Zhongxian Tian
- Department of Environmental Medicine, New York University School of Medicine, New York, NY 10010, USA
| | - Qipeng Xie
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Key Laboratory of Laboratory Medicine, Ministry of Education, China, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China 325035
| | - Junlan Zhu
- Department of Environmental Medicine, New York University School of Medicine, New York, NY 10010, USA
| | - Jingxia Li
- Department of Environmental Medicine, New York University School of Medicine, New York, NY 10010, USA
| | - Haishan Huang
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, Key Laboratory of Laboratory Medicine, Ministry of Education, China, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China 325035.
| | - Chuanshu Huang
- Department of Environmental Medicine, New York University School of Medicine, New York, NY 10010, USA.
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