Orteronel

Orteronel
Names
	IUPAC name 6-(7-Hydroxy-6,7-dihydro-5H-pyrrolo[1,2-c]imidazol-7-yl)-N-methylnaphthalene-2-carboxamide
	Other names TAK-700
Identifiers
CAS Number	566939-85-3 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL1921976;
ChemSpider	8058704;
KEGG	D10146 ;
PubChem CID	9883029;
UNII	UE5K2FNS92;
	InChI InChI=1S/C18H17N3O2/c1-19-17(22)14-3-2-13-9-15(5-4-12(13)8-14)18(23)6-7-21-11-20-10-16(18)21/h2-5,8-11,23H,6-7H2,1H3,(H,19,22);
	SMILES O=C(NC)c2ccc1cc(ccc1c2)C4(O)c3cncn3CC4;
Properties
Chemical formula	C18H17N3O2
Molar mass	307.353 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

Orteronel (TAK-700) is a nonsteroidal CYP17A1 inhibitor that was being developed for the treatment of cancer by Takeda Pharmaceutical Company in conjunction with Millennium Pharmaceuticals.[1] 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.[2]

Orteronel is an androgen biosynthesis inhibitor. It selectively inhibits the enzyme CYP17A1[3] 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.[4] DHEA and androstenedione are androgens and precursors of testosterone. Inhibition of CYP17 activity thus decreases circulating levels of testosterone.

References

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. S2CID 20204862.
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.

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[1] Millennium and Takeda Announce Advancement of Prostate Cancer Program, Millennium Pharmaceuticals

[MarketWatch2014-2] MarketWatch (2014). "Takeda Announces Termination of Orteronel (TAK-700) Development for Prostate Cancer in Japan, U.S.A. and Europe".

[3] 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. S2CID 20204862.

[pmid16287438-4] 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.

Orteronel

See also

References