Akinori Minato1, Hirotsugu Noguchi2, Rei Ohnishi3, Ikko Tomisaki3, Toshiyuki Nakayama4, Naohiro Fujimoto3. 1. Department of Urology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan; a-minato@med.uoeh-u.ac.jp. 2. Department of Pathology, Field of Oncology Graduate School of Medical and Dental Science, Kagoshima, Japan. 3. Department of Urology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan. 4. Department of Pathology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
Abstract
BACKGROUND/AIM: The role of glutathione peroxidase 2 (GPX2) expression in urothelial carcinoma (UC) is rarely reported. The aim of this study was to assess the expression status of GPX2 in UC of the bladder. MATERIALS AND METHODS: We collected samples from 112 patients treated with radical cystectomy for immunohistochemical study. RESULTS: Following immunohistochemical analysis of the specimens, 86 (76.8%) had weak GPX2 expression. In cases with consistent GPX2 expression within the same lesion, the levels of GPX2 showed significant decreases from pTa to pT1 (47.1%) compared to those from pT1 to pT2 (5.9%) (p=0.017). Specimens obtained with transurethral resection before cancer progressed to muscle invasive bladder cancer showed that pT1 had a lower expression for GPX2 than that of pTa (63.3% vs. 93.3%; p=0.009). CONCLUSION: The decrease in GPX2 expression among those with UC of the bladder may be involved in the early step of cancer invasion. Copyright
BACKGROUND/AIM: The role of glutathione peroxidase 2 (GPX2) expression in urothelial carcinoma (UC) is rarely reported. The aim of this study was to assess the expression status of GPX2 in UC of the bladder. MATERIALS AND METHODS: We collected samples from 112 patients treated with radical cystectomy for immunohistochemical study. RESULTS: Following immunohistochemical analysis of the specimens, 86 (76.8%) had weak GPX2 expression. In cases with consistent GPX2 expression within the same lesion, the levels of GPX2 showed significant decreases from pTa to pT1 (47.1%) compared to those from pT1 to pT2 (5.9%) (p=0.017). Specimens obtained with transurethral resection before cancer progressed to muscle invasive bladder cancer showed that pT1 had a lower expression for GPX2 than that of pTa (63.3% vs. 93.3%; p=0.009). CONCLUSION: The decrease in GPX2 expression among those with UC of the bladder may be involved in the early step of cancer invasion. Copyright
Authors: Kimberly D Miller; Rebecca L Siegel; Chun Chieh Lin; Angela B Mariotto; Joan L Kramer; Julia H Rowland; Kevin D Stein; Rick Alteri; Ahmedin Jemal Journal: CA Cancer J Clin Date: 2016-06-02 Impact factor: 508.702