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Estradiol sulfate

Names
IUPAC name 17β-Hydroxyestra-1,3,5(10)-trien-3-yl hydrogen sulfate
Systematic IUPAC name (1S,3aS,3bR,9bS,11aS)-1-Hydroxy-11a-methyl-2,3,3a,3b,4,5,9b,10,11,11a-decahydro-1H-cyclopentaphenanthren-7-yl hydrogen sulfate
Other names Estra-1,3,5(10)-triene-3,17β-diol 3-sulfate
Identifiers
CAS Number	481-96-9 4999-79-5 (sodium)
3D model (JSmol)	Interactive image
ChEBI	CHEBI:4866
ChEMBL	ChEMBL1628111
ChemSpider	59790
PubChem CID	66416
UNII	4NKQ3751P6
CompTox Dashboard (EPA)	DTXSID30964000
InChI InChI=1S/C18H24O5S/c1-18-9-8-14-13-5-3-12(23-24(20,21)22)10-11(13)2-4-15(14)16(18)6-7-17(18)19/h3,5,10,14-17,19H,2,4,6-9H2,1H3,(H,20,21,22)/t14-,15-,16+,17+,18+/m1/s1Key: QZIGLSSUDXBTLJ-ZBRFXRBCSA-N
SMILES CC12CCC3C(C1CCC2O)CCC4=C3C=CC(=C4)OS(=O)(=O)O
Properties
Chemical formula	C18H24O5S
Molar mass	352.445 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Estradiol sulfate (E2S), or 17β-estradiol 3-sulfate, is a natural, endogenous steroid and an estrogen ester. E2S itself is biologically inactive, but it can be converted by steroid sulfatase (also called estrogen sulfatase) into estradiol, which is a potent estrogen. Simultaneously, estrogen sulfotransferases convert estradiol to E2S, resulting in an equilibrium between the two steroids in various tissues. Estrone and E2S are the two immediate metabolic sources of estradiol. E2S can also be metabolized into estrone sulfate (E1S), which in turn can be converted into estrone and estradiol. Circulating concentrations of E2S are much lower than those of E1S. High concentrations of E2S are present in breast tissue, and E2S has been implicated in the biology of breast cancer via serving as an active reservoir of estradiol.

As the sodium salt sodium estradiol sulfate, E2S is present as a minor constituent (0.9%) of conjugated equine estrogens (CEEs), or Premarin. It effectively functions as a prodrug to estradiol in this preparation, similarly to E1S. E2S is also formed as a metabolite of estradiol, as well as of estrone and E1S. Aside from its presence in CEEs, E2S is not available as a commercial pharmaceutical drug.

E2S shows about 10,000-fold lower potency in activating the estrogen receptors relative to estradiol in vitro. It is 10-fold less potent than estrone sulfate orally in terms of in vivo uterotrophic effect in rats. Estrogen sulfates like estradiol sulfate or estrone sulfate are about twice as potent as the corresponding free estrogens in terms of estrogenic effect when given orally to rodents. This in part led to the introduction of conjugated estrogens (Premarin), which are primarily estrone sulfate, in 1941.

Although inactive at steroid hormone receptors, E2S has been found to act as a potent inhibitor of glutathione S-transferase, an enzyme that contributes to the inactivation of estradiol via conversion of it into an estradiol-glutathione conjugate. As such, E2S can indirectly serve as a positive effector of estrogen signaling.

Estradiol levels are about 1.5- to 4-fold higher than E2S levels in women. This is in contrast to E1S, the levels of which are about 10 to 15 times higher than those of estrone.

E2S at an oral dosage of 5 mg/day in women resulted in inhibition of ovulation in 89% of cycles (47 of 53).

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Structural properties of selected estradiol esters

Estrogen	Structure	Ester(s)				Relative mol. weight	Relative E2 content	log P
		Position(s)	Moiet(ies)	Type	Length
Estradiol		–	–	–	–	1.00	1.00	4.0
Estradiol acetate		C3	Ethanoic acid	Straight-chain fatty acid	2	1.15	0.87	4.2
Estradiol benzoate		C3	Benzoic acid	Aromatic fatty acid	– (~4–5)	1.38	0.72	4.7
Estradiol dipropionate		C3, C17β	Propanoic acid (×2)	Straight-chain fatty acid	3 (×2)	1.41	0.71	4.9
Estradiol valerate		C17β	Pentanoic acid	Straight-chain fatty acid	5	1.31	0.76	5.6–6.3
Estradiol benzoate butyrate		C3, C17β	Benzoic acid, butyric acid	Mixed fatty acid	– (~6, 2)	1.64	0.61	6.3
Estradiol cypionate		C17β	Cyclopentylpropanoic acid	Cyclic fatty acid	– (~6)	1.46	0.69	6.9
Estradiol enanthate		C17β	Heptanoic acid	Straight-chain fatty acid	7	1.41	0.71	6.7–7.3
Estradiol dienanthate		C3, C17β	Heptanoic acid (×2)	Straight-chain fatty acid	7 (×2)	1.82	0.55	8.1–10.4
Estradiol undecylate		C17β	Undecanoic acid	Straight-chain fatty acid	11	1.62	0.62	9.2–9.8
Estradiol stearate		C17β	Octadecanoic acid	Straight-chain fatty acid	18	1.98	0.51	12.2–12.4
Estradiol distearate		C3, C17β	Octadecanoic acid (×2)	Straight-chain fatty acid	18 (×2)	2.96	0.34	20.2
Estradiol sulfate		C3	Sulfuric acid	Water-soluble conjugate	–	1.29	0.77	0.3–3.8
Estradiol glucuronide		C17β	Glucuronic acid	Water-soluble conjugate	–	1.65	0.61	2.1–2.7
Estramustine phosphate		C3, C17β	Normustine, phosphoric acid	Water-soluble conjugate	–	1.91	0.52	2.9–5.0
Polyestradiol phosphate		C3–C17β	Phosphoric acid	Water-soluble conjugate	–	1.23	0.81	2.9
Footnotes: = Length of ester in carbon atoms for straight-chain fatty acids or approximate length of ester in carbon atoms for aromatic or cyclic fatty acids. = Relative estradiol content by weight (i.e., relative estrogenic exposure). = Experimental or predicted octanol/water partition coefficient (i.e., lipophilicity/hydrophobicity). Retrieved from PubChem, ChemSpider, and DrugBank. = Also known as estradiol normustine phosphate. = Polymer of estradiol phosphate (~13 repeat units). = Relative molecular weight or estradiol content per repeat unit. = log P of repeat unit (i.e., estradiol phosphate). Sources: See individual articles.

See also

• Catechol estrogen
• DHEA sulfate
• Estradiol glucuronide
• Estriol sulfate
• Estrogen conjugate
• Lipoidal estradiol
• Pregnenolone sulfate
• List of estrogen esters § Estradiol esters

References

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3. Wang, Li-Quan; James, Margaret O. (2005). "Sulfotransferase 2A1 forms estradiol-17-sulfate and celecoxib switches the dominant product from estradiol-3-sulfate to estradiol-17-sulfate". The Journal of Steroid Biochemistry and Molecular Biology. 96 (5): 367–374. doi:10.1016/j.jsbmb.2005.05.002. ISSN 0960-0760. PMID 16011896. S2CID 24671971.
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6. G. Leclercq; S. Toma; R. Paridaens; J. C. Heuson (6 December 2012). Clinical Interest of Steroid Hormone Receptors in Breast Cancer. Springer Science & Business Media. pp. 2105–. ISBN 978-3-642-82188-2.
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10. Ryan J. Huxtable (11 November 2013). Biochemistry of Sulfur. Springer Science & Business Media. pp. 312–. ISBN 978-1-4757-9438-0.
11. King, Roberta; Ghosh, Anasuya; Wu, Jinfang (2006). "Inhibition of human phenol and estrogen sulfotransferase by certain non-steroidal anti-inflammatory agents". Current Drug Metabolism. 7 (7): 745–753. doi:10.2174/138920006778520615. ISSN 1389-2002. PMC 2105742. PMID 17073578.
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14. ^ Herr, F.; Revesz, C.; Manson, A. J.; Jewell, J. B. (1970). "Biological Properties of Estrogen Sulfates". Chemical and Biological Aspects of Steroid Conjugation. pp. 368–408. doi:10.1007/978-3-642-95177-0_8 (inactive 2024-11-02). ISBN 978-3-642-95179-4.{{cite book}}: CS1 maint: DOI inactive as of November 2024 (link)
15. ^ Runge-Morris MA (1997). "Regulation of expression of the rodent cytosolic sulfotransferases". FASEB J. 11 (2): 109–17. doi:10.1096/fasebj.11.2.9039952. PMID 9039952. S2CID 22112485.
16. Singh D, Pandey RS (1996). "Glutathione-S-transferase in rat ovary: its changes during estrous cycle and increase in its activity by estradiol-17 beta". Indian J. Exp. Biol. 34 (11): 1158–60. PMID 9055636.
17. Cowie, Alfred T.; Forsyth, Isabel A.; Hart, Ian C. (1980). "Growth and Development of the Mammary Gland". Hormonal Control of Lactation. Monographs on Endocrinology. Vol. 15. pp. 58–145. doi:10.1007/978-3-642-81389-4_3. ISBN 978-3-642-81391-7. ISSN 0077-1015. PMID 6250026.
18. Gual C, Becerra C, Rice-Wray E, Goldzieher JW (February 1967). "Inhibition of ovulation by estrogens". Am J Obstet Gynecol. 97 (4): 443–7. doi:10.1016/0002-9378(67)90555-8. PMID 4163201.

• Estradiol esters
• Human metabolites
• Phenol esters
• Sulfate esters