Limited Expression of Cytochrome P450 17alpha-Hydroxylase/17,20-Lyase in Prostate Cancer Cell Lines.
10.4111/kju.2011.52.7.494
- Author:
Chang Wook JEONG
1
;
Cheol Yong YOON
;
Seong Jin JEONG
;
Sung Kyu HONG
;
Seok Soo BYUN
;
Sang Eun LEE
Author Information
1. Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea. skhong@snubh.org
- Publication Type:Original Article
- Keywords:
Androgens;
Cell line;
Prostatic neoplasms;
Steroid 17-alpha-hydroxylase
- MeSH:
Androgens;
Androstadienes;
Blotting, Western;
Cell Line;
Cytochrome P-450 Enzyme System;
Cytochromes;
Prostate;
Prostatic Neoplasms;
RNA;
Steroid 17-alpha-Hydroxylase;
Abiraterone Acetate
- From:Korean Journal of Urology
2011;52(7):494-497
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: Cytochrome P450 17alpha-hydroxylase/17,20-lyase (CYP17A1) is a key enzyme in the androgen biosynthesis pathway. CYP17A1 has been focused on because of the promising results of a potent CYP17A1 inhibitor in the treatment of castration-resistant prostate cancer (CRPC). A hypothesis that intratumoral androgenesis may play a role in the progression of CRPC has recently been postulated. Thus, we evaluated whether commonly used prostate cancer cell lines express CYP17A1. MATERIALS AND METHODS: Androgen-sensitive LNCaP and androgen-insensitive PC-3 and DU145 cells were used. To evaluate the expression of CYP17A1 protein and RNA, we performed Western blotting and RT-PCR, respectively. RESULTS: We were unable to detect either CYP17A1 protein or RNA in any of the cell lines tested. We failed to detect any expression of CYP17A1, despite several repetitions of these techniques under different conditions. CONCLUSIONS: The expression of CYP17A1 protein and RNA in LNCaP, PC-3, and DU145 cells appears to be either absent or too low for detection. The mechanism of action of abiraterone acetate, a CYP17A1 inhibitor, may be related more to adrenal androgen blockade than to intratumoral androgenesis.
