Cyproterone acetate


6-Chloro-1β,2β-dihydro-17-hydroxy-3′H-cyclopropa(1,2)-pregna-1,4,6-triene-3,20-dione acetate
Empirical Formula (Hill Notation):
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storage temp.


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Gene Information

human ... AR(367), NR3C1(2908), PGR(5241)
mouse ... Nr3c1(14815)
rat ... Ar(24208)

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Cyproterone acetate has been used to study its effects on insulin-like growth factor I secretion.


250 mg in poly bottle

Biochem/physiol Actions

Cyproterone acetate is a synthetic steroid and an androgen antagonist. It is a potent inhibitor of leukocyte migration through endothethial cell monolayers. Cyproterone acetate acts as a liver tumor promoter in experimental animal model. Liver tumor promotion appears to be female gender-specific, as formation of an active metabolite that forms DNA adducts.

Other Notes

Tandem Mass Spectrometry data independently generated by Scripps Center for Metabolomics is available to view or download in PDF. C3412.pdf Tested metabolites are featured on Scripps Center for Metabolomics METLIN Metabolite Database. To learn more, visit sigma.com/metlin.


Exclamation markHealth hazard

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Hazard Statements

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
M J Tucker et al.
Carcinogenesis, 17(7), 1473-1476 (1996-07-01)
The synthetic progestin cyproterone acetate (CPA) has been shown to be a hepatocarcinogen in the rat, but little is known of its effects in mice. A 52 week CPA study in the mouse strain C57Bl/10J has been reported not to...
Cody J Dey et al.
Hormones and behavior, 58(4), 599-605 (2010-07-10)
Proximate mediators of reproductive behaviors in vertebrates have a long history of study. In fishes, relatively few studies have focused on hormonal control of parental care, despite a comprehensive background on the general physiology of fishes, and the frequent occurrence...
R Hofbauer et al.
Fertility and sterility, 72(4), 652-656 (1999-10-16)
To investigate the influence of ethinyl estradiol and cyproterone acetate in oral contraceptives on leukocyte migration through endothelial cell monolayers. Experimental in vitro prospective study. An academic research laboratory. Endothelial cells were cultured on microporous membranes to produce monolayers. Polymorphonuclear...
Cyproterone, norethindrone, medroxyprogesterone and levonorgestrel are less potent local human growth hormone and insulin-like growth factor I secretion stimulators than progesterone in human breast cancer explants expressing the estrogen receptor
Milewicz T, et al.
Gynecological Endocrinology, 16(4), 319-329 (2002)
Marta Díaz et al.
The Journal of clinical endocrinology and metabolism, 97(10), 3630-3638 (2012-07-14)
The aim was to compare the effects of a traditional therapy (an oral estroprogestagen) to those of a novel treatment (a low-dose combination of generics) in adolescent girls with androgen excess. In an open-label trial over 1 yr, 34 adolescents...
Cancer research has revealed that the classical model of carcinogenesis, a three step process consisting of initiation, promotion, and progression, is not complete.
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