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Tachibana H, Gi M, Kato M, Yamano S, Fujioka M, Kakehashi A, Hirayama Y, Koyama Y, Tamada S, Nakatani T, Wanibuchi H. Carbonic anhydrase 2 is a novel invasion-associated factor in urinary bladder cancers. Cancer Sci 2017; 108:331-337. [PMID: 28004470 PMCID: PMC5378286 DOI: 10.1111/cas.13143] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 12/11/2016] [Accepted: 12/17/2016] [Indexed: 01/01/2023] Open
Abstract
Rat bladder cancer is nearly always papillary non-invasive urothelial carcinoma (UC). To establish an animal model mimicking invasive UC that arises from papillary non-invasive UC in the bladder, male human c-Ha-ras proto-oncogene transgenic rats (Hras128) were treated with 0.05% N-butyl-N-(hydroxybutyl)nitrosameine (BBN) in their drinking water and/or 0.1% phenylethyl isothiocyanate (PEITC) in their diet as follows: BBN (8 weeks)→PEITC (8 weeks); PEITC (8 weeks)→BBN (8 weeks); BBN alone (16 weeks); PEITC alone (16 weeks); and no treatment. At the end of week 16, the highest incidence of invasive UC was observed in the BBN→PEITC group. Therefore, we used Hras128 rats treated with BBN followed by PEITC as a model of invasive bladder cancer to identify invasion-associated proteins. Proteome analysis was performed to compare the protein profiles of invasive and non-invasive UC in Hras128 rats. We identified 49 proteins that were either overexpressed or underexpressed in invasive UC but not in non-invasive UC. Immunohistochemical analysis of carbonic anhydrase 2 (CA2), an overexpressed protein, showed that the relative number of CA2-positive UC was significantly higher for invasive UC compared to non-invasive UC in rats. Moreover, the incidence of CA2-positive cancers was also significantly higher for human muscle-invasive bladder cancer (MIBC) compared to non-MIBC (NMIBC) and was positively associated with the progression of NMIBC. Our findings indicate that CA2 is an invasion-associated factor and suggest that it could serve as a potential therapeutic molecular target for bladder cancers.
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Affiliation(s)
- Hirokazu Tachibana
- Department of Molecular Pathology, Osaka City University Graduate School of Medicine, Osaka, Japan.,Department of Urology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Min Gi
- Department of Molecular Pathology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Minoru Kato
- Department of Molecular Pathology, Osaka City University Graduate School of Medicine, Osaka, Japan.,Department of Urology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Shotaro Yamano
- Department of Molecular Pathology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Masaki Fujioka
- Department of Molecular Pathology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Anna Kakehashi
- Department of Molecular Pathology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Yukiyoshi Hirayama
- Department of Molecular Pathology, Osaka City University Graduate School of Medicine, Osaka, Japan.,Department of Urology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Yuki Koyama
- Department of Molecular Pathology, Osaka City University Graduate School of Medicine, Osaka, Japan.,Department of Urology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Satoshi Tamada
- Department of Urology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Tatsuya Nakatani
- Department of Urology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Hideki Wanibuchi
- Department of Molecular Pathology, Osaka City University Graduate School of Medicine, Osaka, Japan
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