|Jmol-3D images||Image 1|
|Molar mass||307.35 g mol−1|
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)|
Orteronel (TAK-700) is an antiandrogen that was being developed for the treatment of cancer by Takeda Pharmaceutical Company in conjunction with Millennium Pharmaceuticals. It completed two phase III clinical trials for metastatic, hormone-refractory prostate cancer but failed to extend overall survival rates, and development was voluntarily terminated as a result.
Orteronel is an androgen biosynthesis inhibitor. It selectively inhibits the enzyme CYP17A1 which is expressed in testicular, adrenal, and prostatic tumor tissues. CYP17 catalyzes two sequential reactions: (a) the conversion of pregnenolone and progesterone to their 17α-hydroxy derivatives by its 17α-hydroxylase activity, and (b) the subsequent formation of dehydroepiandrosterone (DHEA) and androstenedione, respectively, by its 17,20-lyase activity. DHEA and androstenedione are androgens and precursors of testosterone. Inhibition of CYP17 activity thus decreases circulating levels of testosterone.
- Millennium and Takeda Announce Advancement of Prostate Cancer Program, Millennium Pharmaceuticals
- MarketWatch (2014). "Takeda Announces Termination of Orteronel (TAK-700) Development for Prostate Cancer in Japan, U.S.A. and Europe".
- Yamaoka, M; Hara, T; Hitaka, T; Kaku, T; Takeuchi, T; Takahashi, J; Asahi, S; Miki, H et al. (2012). "Orteronel (TAK-700), a novel non-steroidal 17,20-lyase inhibitor: Effects on steroid synthesis in human and monkey adrenal cells and serum steroid levels in cynomolgus monkeys". The Journal of steroid biochemistry and molecular biology 129 (3–5): 115–28. doi:10.1016/j.jsbmb.2012.01.001. PMID 22249003.
- Attard G, Belldegrun AS, de Bono JS (December 2005). "Selective blockade of androgenic steroid synthesis by novel lyase inhibitors as a therapeutic strategy for treating metastatic prostate cancer". BJU Int. 96 (9): 1241–6. doi:10.1111/j.1464-410X.2005.05821.x. PMID 16287438.