3β-Androstanediol

3β-Androstanediol

Names
IUPAC name (3β,5α,17β)-Androstane-3,17-diol
Systematic IUPAC name (1S,2S,5S,7S,10R,11S,14S,15S)-2,15-Dimethyltetracyclo[8.7.0.0^2,7.0^11,15]heptadecane-5,14-diol
Other names 3β-Androstanediol; 3β-Diol; Maxterone
Identifiers
CAS Number	571-20-0
3D model (Jmol)	Interactive image
ChEMBL	ChEMBL316048
ChemSpider	211834
ECHA InfoCard	100.008.487
PubChem	242332
InChI InChI=1S/C19H32O2/c1-18-9-7-13(20)11-12(18)3-4-14-15-5-6-17(21)19(15,2)10-8-16(14)18/h12-17,20-21H,3-11H2,1-2H3/t12-,13-,14-,15-,16-,17-,18-,19-/m0/s1 Key: CBMYJHIOYJEBSB-YSZCXEEOSA-N InChI=1/C19H32O2/c1-18-9-7-13(20)11-12(18)3-4-14-15-5-6-17(21)19(15,2)10-8-16(14)18/h12-17,20-21H,3-11H2,1-2H3/t12-,13-,14-,15-,16-,17-,18-,19-/m0/s1 Key: CBMYJHIOYJEBSB-YSZCXEEOBK
SMILES O[C@H]4CC[C@]3([C@@H](CC[C@H]2[C@@H]1CC[C@H](O)[C@@]1(C)CC[C@@H]23)C4)C
Properties
Chemical formula	C19H32O2
Molar mass	292.46 g·mol^−1
Melting point	168–170 °C (334–338 °F; 441–443 K) [1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

3β-Androstanediol, also known as 5α-androstane-3β,17β-diol, and often shortened to 3β-diol, is an endogenous steroid hormone. It is a 5α-reduced and 17β-hydroxylated metabolite of dehydroepiandrosterone (DHEA) as well as a 3β-hydroxylated metabolite of dihydrotestosterone (DHT). 3β-Diol is a selective, potent, high-affinity full agonist of the ERβ, and hence, an estrogen.^[2] It has higher affinity for this receptor than estradiol.^[2] In contrast to ERβ, 3β-diol does not bind to the androgen receptor (AR).^[3] 3β-Diol has been reported to also bind to ERα with low nanomolar affinity, with several-fold lower affinity relative to ERβ.^[4][5] It has approximately 3% and 7% of the affinity of estradiol at the ERα and ERβ, respectively.^[6] Unlike its 3α-isomer, 3α-androstanediol (3α-diol), 3β-diol does not bind to the GABA_A receptor.^[7]

3β-Diol appears to be the endogenous ligand of ERβ in the prostate gland, and as a result of activation of the ERβ, 3β-diol has antiproliferative effects against prostate cancer cells.^[8] Through the ERβ, 3β-diol positively regulates oxytocin neurons and signaling in the paraventricular nucleus of hypothalamus (PVN),^[9][10] and has been found to have antidepressant,^[11] anxiolytic,^[12] cognitive-enhancing,^[12] and stress-relieving effects via this action.^[13][14] Androgens, including testosterone and dihydrotestosterone (DHT), are known to downregulate the hypothalamic-pituitary-adrenal axis, and this has been found to be due in part or full to their conversion into 3β-diol rather than to activation of the AR.^[13][14][15]

A determination of the circulating levels of 3β-diol in humans found concentrations of 239 ± 76 pg/ml and 82 ± 45 pg/ml of the compound in normal male and female serum, respectively.^[16]

An orally active synthetic analogue of 3β-diol, 17α-ethynyl-5α-androstane-3α,17β-diol (HE3235, Apoptone), was formerly under investigation for the treatment of prostate cancer and breast cancer.^[17]

See also

• 3α-Androstanediol
• Epiandrosterone
• Pregnanetriol

References

1. Wang, Xingbin; Liu, Hui; Yan, Peiyun; Liu, Jinliang; Li, Yan; Sun, Qian; Wang, Cunde (1 May 2011). "Simultaneously rapid deprotection of 3-acyloxy groups and reduction of D-ring ketones (nitrile) of steroids using DIBAL-H/NiCl₂". Journal of Chemical Research. 35 (5): 291–293. doi:10.3184/174751911X13050949941793.
2. C.Y. Cheng (24 October 2009). Molecular Mechanisms in Spermatogenesis. Springer Science & Business Media. pp. 259–. ISBN 978-0-387-09597-4.
3. Oliveira AG, Coelho PH, Guedes FD, Mahecha GA, Hess RA, Oliveira CA (December 2007). "5alpha-Androstane-3beta,17beta-diol (3beta-diol), an estrogenic metabolite of 5alpha-dihydrotestosterone, is a potent modulator of estrogen receptor ERbeta expression in the ventral prostrate of adult rats". Steroids. 72 (14): 914–22. doi:10.1016/j.steroids.2007.08.001. PMID 17854852.
4. Baker ME (2002). "Recent insights into the origins of adrenal and sex steroid receptors". J. Mol. Endocrinol. 28 (3): 149–52. doi:10.1677/jme.0.0280149. PMID 12063181.
5. Kuiper, George G. J. M.; Carlsson, Bo; Grandien, Kaj; Enmark, Eva; Häggblad, Johan; Nilsson, Stefan; Gustafsson, Jan-Åke (1997). "Comparison of the Ligand Binding Specificity and Transcript Tissue Distribution of Estrogen Receptors α and β". Endocrinology. 138 (3): 863–870. doi:10.1210/endo.138.3.4979. ISSN 0013-7227.
6. Kuiper GG, Carlsson B, Grandien K, Enmark E, Häggblad J, Nilsson S, Gustafsson JA (1997). "Comparison of the ligand binding specificity and transcript tissue distribution of estrogen receptors alpha and beta". Endocrinology. 138 (3): 863–70. doi:10.1210/endo.138.3.4979. PMID 9048584.
7. Reddy, D. S.; Jian, K. (2010). "The Testosterone-Derived Neurosteroid Androstanediol Is a Positive Allosteric Modulator of GABAA Receptors". Journal of Pharmacology and Experimental Therapeutics. 334 (3): 1031–1041. doi:10.1124/jpet.110.169854. ISSN 0022-3565. PMC 2939675. PMID 20551294.
8. Weihua Z, Lathe R, Warner M, Gustafsson JA (October 2002). "An endocrine pathway in the prostate, ERbeta, AR, 5alpha-androstane-3beta,17beta-diol, and CYP7B1, regulates prostate growth". Proceedings of the National Academy of Sciences of the United States of America. 99 (21): 13589–94. doi:10.1073/pnas.162477299. PMC 129718. PMID 12370428.
9. Sharma, Dharmendra; Handa, Robert J.; Uht, Rosalie M. (2012). "The ERβ Ligand 5α-androstane, 3β,17β-diol (3β-diol) Regulates Hypothalamic Oxytocin (Oxt) Gene Expression". Endocrinology. 153 (5): 2353–2361. doi:10.1210/en.2011-1002. ISSN 0013-7227.
10. Hiroi, Ryoko; Lacagnina, Anthony F.; Hinds, Laura R.; Carbone, David G.; Uht, Rosalie M.; Handa, Robert J. (2013). "The Androgen Metabolite, 5α-Androstane-3β,17β-Diol (3β-Diol), Activates the Oxytocin Promoter Through an Estrogen Receptor-β Pathway". Endocrinology. 154 (5): 1802–1812. doi:10.1210/en.2012-2253. ISSN 0013-7227.
11. Huang, Q; Zhu, H; Fischer, D; Zhou, J (2008). "An estrogenic effect of 5α-androstane-3β, 17β-diol on the behavioral response to stress and on CRH regulation". Neuropharmacology. 54 (8): 1233–1238. doi:10.1016/j.neuropharm.2008.03.016. ISSN 0028-3908.
12. Frye, C; Koonce, C; Edinger, K; Osborne, D; Walf, A (2008). "Androgens with activity at estrogen receptor beta have anxiolytic and cognitive-enhancing effects in male rats and mice". Hormones and Behavior. 54 (5): 726–734. doi:10.1016/j.yhbeh.2008.07.013. ISSN 0018-506X.
13. Handa, R. J.; Weiser, M. J.; Zuloaga, D. G. (2009). "A Role for the Androgen Metabolite, 5α-Androstane-3β,17β-Diol, in Modulating Oestrogen Receptor β-Mediated Regulation of Hormonal Stress Reactivity". Journal of Neuroendocrinology. 21 (4): 351–358. doi:10.1111/j.1365-2826.2009.01840.x. ISSN 0953-8194.
14. Handa, Robert J.; Sharma, Dharmendra; Uht, Rosalie (2011). "A Role for the Androgen Metabolite, 5alpha Androstane 3beta, 17beta Diol (3?-Diol) in the Regulation of the Hypothalamo-Pituitary?Adrenal Axis". Frontiers in Endocrinology. 2. doi:10.3389/fendo.2011.00065. ISSN 1664-2392.
15. Handa, Robert J.; Pak, Toni R.; Kudwa, Andrea E.; Lund, Trent D.; Hinds, Laura (2008). "An alternate pathway for androgen regulation of brain function: Activation of estrogen receptor beta by the metabolite of dihydrotestosterone, 5α-androstane-3β,17β-diol". Hormones and Behavior. 53 (5): 741–752. doi:10.1016/j.yhbeh.2007.09.012. ISSN 0018-506X.
16. Laband P, Tresguerres JA, Lisboa BP, Volkwein U, Tamm J (August 1978). "The determination of 5alpha-androstane-3alpha, 17beta-diol in human plasma by radioimmunoassay". Acta Endocrinologica. 88 (4): 778–86. PMID 581118.
17. Ahlem C, Kennedy M, Page T, Bell D, Delorme E, Villegas S, Reading C, White S, Stickney D, Frincke J (2012). "17α-alkynyl 3α, 17β-androstanediol non-clinical and clinical pharmacology, pharmacokinetics and metabolism". Invest New Drugs. 30 (1): 59–78. doi:10.1007/s10637-010-9517-0. PMID 20814732.