Tmic
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Record Information
Version2.0
Creation Date2014-09-11 05:14:37 UTC
Update Date2014-12-24 20:26:56 UTC
Accession NumberT3D4747
Identification
Common NameCyproterone acetate
ClassSmall Molecule
DescriptionAn anti-androgen that, in the form of its acetate (cyproterone acetate), also has progestational properties. It is used in the treatment of hypersexuality in males, as a palliative in prostatic carcinoma, and, in combination with estrogen, for the therapy of severe acne and hirsutism in females.
Compound Type
  • Drug
  • Ester
  • Ether
  • Organic Compound
  • Organochloride
  • Synthetic Compound
Chemical Structure
Thumb
Synonyms
Synonym
Androcur
Cyprostat
Cyproterone 17-O-acetate
Cyproterone acetic acid
Chemical FormulaC24H29ClO4
Average Molecular Mass416.938 g/mol
Monoisotopic Mass416.175 g/mol
CAS Registry Number427-51-0
IUPAC Name(1S,2S,3S,5R,11R,12S,15R,16S)-15-acetyl-9-chloro-2,16-dimethyl-6-oxopentacyclo[9.7.0.0²,⁸.0³,⁵.0¹²,¹⁶]octadeca-7,9-dien-15-yl acetate
Traditional Namecyproterone acetate
SMILES[H][C@@]12C[C@]1([H])[C@@]1(C)C(=CC2=O)C(Cl)=C[C@@]2([H])[C@]3([H])CC[C@](OC(C)=O)(C(C)=O)[C@@]3(C)CC[C@]12[H]
InChI IdentifierInChI=1/C24H29ClO4/c1-12(26)24(29-13(2)27)8-6-16-14-10-20(25)19-11-21(28)15-9-18(15)23(19,4)17(14)5-7-22(16,24)3/h10-11,14-18H,5-9H2,1-4H3/t14-,15+,16-,17-,18-,22-,23-,24-/s2
InChI KeyInChIKey=UWFYSQMTEOIJJG-HEULQOMWNA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as gluco/mineralocorticoids, progestogins and derivatives. These are steroids with a structure based on a hydroxylated prostane moiety.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassSteroids and steroid derivatives
Sub ClassPregnane steroids
Direct ParentGluco/mineralocorticoids, progestogins and derivatives
Alternative Parents
Substituents
  • Progestogin-skeleton
  • 20-oxosteroid
  • Steroid ester
  • 3-oxosteroid
  • 6-halo-steroid
  • Halo-steroid
  • Oxosteroid
  • Cyclohexenone
  • Alpha-acyloxy ketone
  • Ketone
  • Carboxylic acid ester
  • Haloalkene
  • Chloroalkene
  • Monocarboxylic acid or derivatives
  • Carboxylic acid derivative
  • Vinyl chloride
  • Vinyl halide
  • Organooxygen compound
  • Organochloride
  • Organohalogen compound
  • Hydrocarbon derivative
  • Organic oxygen compound
  • Organic oxide
  • Carbonyl group
  • Aliphatic homopolycyclic compound
Molecular FrameworkAliphatic homopolycyclic compounds
External Descriptors
Biological Properties
StatusDetected and Not Quantified
OriginExogenous
Cellular Locations
  • Membrane
Biofluid LocationsNot Available
Tissue LocationsNot Available
PathwaysNot Available
ApplicationsNot Available
Biological RolesNot Available
Chemical RolesNot Available
Physical Properties
StateSolid
AppearanceWhite powder.
Experimental Properties
PropertyValue
Melting Point200-201°C
Boiling PointNot Available
SolubilityNot Available
LogPNot Available
Predicted Properties
PropertyValueSource
Water Solubility0.0015 g/LALOGPS
logP3.81ALOGPS
logP3.64ChemAxon
logS-5.4ALOGPS
pKa (Strongest Acidic)17.83ChemAxon
pKa (Strongest Basic)-5.6ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area60.44 ŲChemAxon
Rotatable Bond Count3ChemAxon
Refractivity111.81 m³·mol⁻¹ChemAxon
Polarizability44.65 ųChemAxon
Number of Rings5ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash Key
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-qTof , Positivesplash10-0006-9211100001-d28e5fdc8591481f22f9View in MoNA
LC-MS/MSLC-MS/MS Spectrum - , positivesplash10-01t9-3971000000-1dfca0904cf6f0055e70View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-014i-0009600000-b58e59a860b40f6fa16aView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-05r1-1079100000-2b2076ee4e989b996df7View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-000m-6090000000-a52f873929348166d62aView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-01b9-2007900000-9919c0052c65d1218b0bView in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-05fr-2009100000-dd4f568fa03074230f01View in MoNA
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0a4i-7019000000-5bd7b03633e9ae6146acView in MoNA
1D NMR13C NMR SpectrumNot AvailableView in JSpectraViewer
Toxicity Profile
Route of ExposureCompletely absorbed following oral administration.
Mechanism of ToxicityThe direct antiandrogenic effect of cyproterone is blockage of the binding of dihydrotestosterone to the specific receptors in the prostatic carcinoma cell. In addition, cyproterone exerts a negative feed-back on the hypothalamo-pituitary axis, by inhibiting the secretion of luteinizing hormone resulting in diminished production of testicular testosterone.
MetabolismPrimarily hepatic. Cyproterone acetate is metabolized by the CYP3A4 enzyme, forming the active metabolite 15beta-hydroxycyproterone acetate, which retains its antiandrogen activity, but has reduced progestational activity. Route of Elimination: It is excreted approximately 60% in the bile and 33% through the kidneys. Half Life: Elimination Following oral or intramuscular administration, the plasma half-life is 38 and 96 hours, respectively.
Toxicity ValuesNot Available
Lethal DoseNot Available
Carcinogenicity (IARC Classification)No indication of carcinogenicity to humans (not listed by IARC).
Uses/SourcesFor the palliative treatment of patients with advanced prostatic carcinoma.
Minimum Risk LevelNot Available
Health EffectsNot Available
SymptomsNot Available
TreatmentNot Available
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
DrugBank IDDB04839
HMDB IDNot Available
PubChem Compound IDNot Available
ChEMBL IDCHEMBL142130
ChemSpider IDNot Available
KEGG IDNot Available
UniProt IDNot Available
OMIM ID
ChEBI ID50743
BioCyc IDNot Available
CTD IDNot Available
Stitch IDNot Available
PDB IDNot Available
ACToR IDNot Available
Wikipedia LinkCyproterone_acetate
References
Synthesis Reference

Aranya Manosroi, “Synthesis of cyproterone acetate.” U.S. Patent US20040024230, issued February 05, 2004.

MSDSNot Available
General References
  1. Giorgi EP, Shirley IM, Grant JK, Stewart JC: Androgen dynamics in vitro in the human prostate gland. Effect of cyproterone and cyproterone acetate. Biochem J. 1973 Mar;132(3):465-74. [4125095 ]
  2. Pham-Huu-Trung MT, de Smitter N, Bogyo A, Girard F: Effects of cyproterone acetate on adrenal steroidogenesis in vitro. Horm Res. 1984;20(2):108-15. [6237971 ]
  3. Stadtler FA, Langner V: The effect of cyproterone and gonadotrophins on the adrenal gland of juvenile and adult rats. A morphological and morphometrical study. Pathol Res Pract. 1985 Mar;179(4-5):493-8. [4001026 ]
  4. Honer C, Nam K, Fink C, Marshall P, Ksander G, Chatelain RE, Cornell W, Steele R, Schweitzer R, Schumacher C: Glucocorticoid receptor antagonism by cyproterone acetate and RU486. Mol Pharmacol. 2003 May;63(5):1012-20. [12695529 ]
  5. Holdaway IM, Croxson MS, Evans MC, France J, Sheehan A, Wilson T, Ibbertson HK: Effect of cyproterone acetate on glucocorticoid secretion in patients treated for hirsutism. Acta Endocrinol (Copenh). 1983 Oct;104(2):222-6. [6227191 ]
Gene Regulation
Up-Regulated GenesNot Available
Down-Regulated GenesNot Available

Targets

General Function:
Zinc ion binding
Specific Function:
Steroid hormone receptors are ligand-activated transcription factors that regulate eukaryotic gene expression and affect cellular proliferation and differentiation in target tissues. Transcription factor activity is modulated by bound coactivator and corepressor proteins. Transcription activation is down-regulated by NR0B2. Activated, but not phosphorylated, by HIPK3 and ZIPK/DAPK3.
Gene Name:
AR
Uniprot ID:
P10275
Molecular Weight:
98987.9 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC500.00763 uMNVS_NR_hARNovascreen
AC500.252 uMOT_AR_ARSRC1_0480Odyssey Thera
AC500.397 uMOT_AR_ARSRC1_0960Odyssey Thera
AC500.554 uMTox21_AR_BLA_Antagonist_ratioTox21/NCGC
AC500.325 uMTox21_AR_LUC_MDAKB2_AgonistTox21/NCGC
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]
General Function:
Zinc ion binding
Specific Function:
The steroid hormones and their receptors are involved in the regulation of eukaryotic gene expression and affect cellular proliferation and differentiation in target tissues. Progesterone receptor isoform B (PRB) is involved activation of c-SRC/MAPK signaling on hormone stimulation.Isoform A: inactive in stimulating c-Src/MAPK signaling on hormone stimulation.Isoform 4: Increases mitochondrial membrane potential and cellular respiration upon stimulation by progesterone.
Gene Name:
PGR
Uniprot ID:
P06401
Molecular Weight:
98979.96 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC500.00763 uMNVS_NR_hPRNovascreen
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]
General Function:
Zinc ion binding
Specific Function:
Nuclear hormone receptor. The steroid hormones and their receptors are involved in the regulation of eukaryotic gene expression and affect cellular proliferation and differentiation in target tissues. Ligand-dependent nuclear transactivation involves either direct homodimer binding to a palindromic estrogen response element (ERE) sequence or association with other DNA-binding transcription factors, such as AP-1/c-Jun, c-Fos, ATF-2, Sp1 and Sp3, to mediate ERE-independent signaling. Ligand binding induces a conformational change allowing subsequent or combinatorial association with multiprotein coactivator complexes through LXXLL motifs of their respective components. Mutual transrepression occurs between the estrogen receptor (ER) and NF-kappa-B in a cell-type specific manner. Decreases NF-kappa-B DNA-binding activity and inhibits NF-kappa-B-mediated transcription from the IL6 promoter and displace RELA/p65 and associated coregulators from the promoter. Recruited to the NF-kappa-B response element of the CCL2 and IL8 promoters and can displace CREBBP. Present with NF-kappa-B components RELA/p65 and NFKB1/p50 on ERE sequences. Can also act synergistically with NF-kappa-B to activate transcription involving respective recruitment adjacent response elements; the function involves CREBBP. Can activate the transcriptional activity of TFF1. Also mediates membrane-initiated estrogen signaling involving various kinase cascades. Isoform 3 is involved in activation of NOS3 and endothelial nitric oxide production. Isoforms lacking one or several functional domains are thought to modulate transcriptional activity by competitive ligand or DNA binding and/or heterodimerization with the full length receptor. Essential for MTA1-mediated transcriptional regulation of BRCA1 and BCAS3. Isoform 3 can bind to ERE and inhibit isoform 1.
Gene Name:
ESR1
Uniprot ID:
P03372
Molecular Weight:
66215.45 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC500.0412 uMACEA_T47D_80hr_PositiveACEA Biosciences
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]
General Function:
Zinc ion binding
Specific Function:
Receptor for glucocorticoids (GC). Has a dual mode of action: as a transcription factor that binds to glucocorticoid response elements (GRE), both for nuclear and mitochondrial DNA, and as a modulator of other transcription factors. Affects inflammatory responses, cellular proliferation and differentiation in target tissues. Could act as a coactivator for STAT5-dependent transcription upon growth hormone (GH) stimulation and could reveal an essential role of hepatic GR in the control of body growth. Involved in chromatin remodeling. May play a negative role in adipogenesis through the regulation of lipolytic and antilipogenic genes expression.
Gene Name:
NR3C1
Uniprot ID:
P04150
Molecular Weight:
85658.57 Da
Binding/Activity Constants
TypeValueAssay TypeAssay Source
AC500.075 uMNVS_NR_hGRNovascreen
AC500.0866 uMTox21_GR_BLA_Antagonist_ratioTox21/NCGC
References
  1. Sipes NS, Martin MT, Kothiya P, Reif DM, Judson RS, Richard AM, Houck KA, Dix DJ, Kavlock RJ, Knudsen TB: Profiling 976 ToxCast chemicals across 331 enzymatic and receptor signaling assays. Chem Res Toxicol. 2013 Jun 17;26(6):878-95. doi: 10.1021/tx400021f. Epub 2013 May 16. [23611293 ]