Limited Expression of Cytochrome P450 17α-Hydroxylase/17,20-Lyase in Prostate Cancer Cell Lines
정창욱, 윤철용, 정성진, 홍성규, 변석수, 이상은,
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정창욱 ( Jeong Chang-Wook )
Seoul National University Bundang Hospital Department of Urology
윤철용 ( Yoon Cheol-Yong )
Seoul National University Bundang Hospital Department of Urology
정성진 ( Jeong Seong-Jin )
Seoul National University Bundang Hospital Department of Urology
홍성규 ( Hong Sung-Kyu )
Seoul National University Bundang Hospital Department of Urology
변석수 ( Byun Seok-Soo )
Seoul National University Bundang Hospital Department of Urology
이상은 ( Lee Sang-Eun )
Seoul National University Bundang Hospital Department of Urology
KMID : 0358320110520070494
Abstract
Purpose: Cytochrome P450 17α-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.
키워드
Androgens; Cell line; Prostatic neoplasms; Steroid 17-alpha-hydroxylase
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