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17α-Estradiol

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From Wikipedia, the free encyclopedia

Not to be confused with17β-Estradiol.

This article is about 17α-estradiol as a hormone. For its use as a medication, seeAlfatradiol.

17α-Estradiol
Names

IUPAC name Estra-1,3,5(10)-triene-3,17α-diol
Systematic IUPAC name (1R,3aS,3bR,9bS,11aS)-11a-Methyl-2,3,3a,3b,4,5,9b,10,11,11a-decahydro-1H-cyclopenta[a]phenanthrene-1,7-diol
Other names 17α-E2; Alpha-Estradiol; Alfatradiol; 17-Epiestradiol; β-Estradiol (obsolete, misleading)^[1]
Identifiers
CAS Number	57-91-0
3D model (JSmol)	Interactive image
ChEBI	CHEBI:17160
ChemSpider	61840
ECHA InfoCard	100.000.322
PubChem CID	68570
UNII	3VQ38D63M7
CompTox Dashboard(EPA)	DTXSID8022377
InChI InChI=1S/C18H24O2/c1-18-9-8-14-13-5-3-12(19)10-11(13)2-4-15(14)16(18)6-7-17(18)20/h3,5,10,14-17,19-20H,2,4,6-9H2,1H3/t14-,15-,16+,17-,18+/m1/s1
SMILES C[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@H]2O)CCC4=C3C=CC(=C4)O
Properties
Chemical formula	C₁₈H₂₄O₂
Molar mass	272.388 g·mol⁻¹
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chemical compound

17α-Estradiol (also known as17α-E2,17-epiestradiol,alfatradiol, orestra-1,3,5(10)-triene-3,17α-diol) is a minor and weakendogenous steroidal estrogen that is related to17β-estradiol (better known simply as estradiol).^[2] It is the C17epimer of estradiol.^[2] It has approximately 100-fold lowerestrogenic potency than 17β-estradiol.^[3] The compound shows preferentialaffinity for theERα over theERβ.^[2]^[4] Although 17α-estradiol is far weaker than 17β-estradiol as anagonist of thenuclear estrogen receptors, it has been found to bind to and activate thebrain-expressedER-X with a greater potency than that of 17β-estradiol, suggesting that it may be the predominant endogenousligand for the receptor.^[5]

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Affinities of estrogen receptor ligands for the ERα and ERβ
Ligand	Other names	Relative binding affinities (RBA, %)^a		Absolute binding affinities (K_i, nM)^a		Action
Ligand	Other names	ERα	ERβ	ERα	ERβ	Action
Estradiol	E2; 17β-Estradiol	100	100	0.115 (0.04–0.24)	0.15 (0.10–2.08)	Estrogen
Estrone	E1; 17-Ketoestradiol	16.39 (0.7–60)	6.5 (1.36–52)	0.445 (0.3–1.01)	1.75 (0.35–9.24)	Estrogen
Estriol	E3; 16α-OH-17β-E2	12.65 (4.03–56)	26 (14.0–44.6)	0.45 (0.35–1.4)	0.7 (0.63–0.7)	Estrogen
Estetrol	E4; 15α,16α-Di-OH-17β-E2	4.0	3.0	4.9	19	Estrogen
Alfatradiol	17α-Estradiol	20.5 (7–80.1)	8.195 (2–42)	0.2–0.52	0.43–1.2	Metabolite
16-Epiestriol	16β-Hydroxy-17β-estradiol	7.795 (4.94–63)	50	?	?	Metabolite
17-Epiestriol	16α-Hydroxy-17α-estradiol	55.45 (29–103)	79–80	?	?	Metabolite
16,17-Epiestriol	16β-Hydroxy-17α-estradiol	1.0	13	?	?	Metabolite
2-Hydroxyestradiol	2-OH-E2	22 (7–81)	11–35	2.5	1.3	Metabolite
2-Methoxyestradiol	2-MeO-E2	0.0027–2.0	1.0	?	?	Metabolite
4-Hydroxyestradiol	4-OH-E2	13 (8–70)	7–56	1.0	1.9	Metabolite
4-Methoxyestradiol	4-MeO-E2	2.0	1.0	?	?	Metabolite
2-Hydroxyestrone	2-OH-E1	2.0–4.0	0.2–0.4	?	?	Metabolite
2-Methoxyestrone	2-MeO-E1	<0.001–<1	<1	?	?	Metabolite
4-Hydroxyestrone	4-OH-E1	1.0–2.0	1.0	?	?	Metabolite
4-Methoxyestrone	4-MeO-E1	<1	<1	?	?	Metabolite
16α-Hydroxyestrone	16α-OH-E1; 17-Ketoestriol	2.0–6.5	35	?	?	Metabolite
2-Hydroxyestriol	2-OH-E3	2.0	1.0	?	?	Metabolite
4-Methoxyestriol	4-MeO-E3	1.0	1.0	?	?	Metabolite
Estradiol sulfate	E2S; Estradiol 3-sulfate	<1	<1	?	?	Metabolite
Estradiol disulfate	Estradiol 3,17β-disulfate	0.0004	?	?	?	Metabolite
Estradiol 3-glucuronide	E2-3G	0.0079	?	?	?	Metabolite
Estradiol 17β-glucuronide	E2-17G	0.0015	?	?	?	Metabolite
Estradiol 3-gluc. 17β-sulfate	E2-3G-17S	0.0001	?	?	?	Metabolite
Estrone sulfate	E1S; Estrone 3-sulfate	<1	<1	>10	>10	Metabolite
Estradiol benzoate	EB; Estradiol 3-benzoate	10	?	?	?	Estrogen
Estradiol 17β-benzoate	E2-17B	11.3	32.6	?	?	Estrogen
Estrone methyl ether	Estrone 3-methyl ether	0.145	?	?	?	Estrogen
ent-Estradiol	1-Estradiol	1.31–12.34	9.44–80.07	?	?	Estrogen
Equilin	7-Dehydroestrone	13 (4.0–28.9)	13.0–49	0.79	0.36	Estrogen
Equilenin	6,8-Didehydroestrone	2.0–15	7.0–20	0.64	0.62	Estrogen
17β-Dihydroequilin	7-Dehydro-17β-estradiol	7.9–113	7.9–108	0.09	0.17	Estrogen
17α-Dihydroequilin	7-Dehydro-17α-estradiol	18.6 (18–41)	14–32	0.24	0.57	Estrogen
17β-Dihydroequilenin	6,8-Didehydro-17β-estradiol	35–68	90–100	0.15	0.20	Estrogen
17α-Dihydroequilenin	6,8-Didehydro-17α-estradiol	20	49	0.50	0.37	Estrogen
Δ⁸-Estradiol	8,9-Dehydro-17β-estradiol	68	72	0.15	0.25	Estrogen
Δ⁸-Estrone	8,9-Dehydroestrone	19	32	0.52	0.57	Estrogen
Ethinylestradiol	EE; 17α-Ethynyl-17β-E2	120.9 (68.8–480)	44.4 (2.0–144)	0.02–0.05	0.29–0.81	Estrogen
Mestranol	EE 3-methyl ether	?	2.5	?	?	Estrogen
Moxestrol	RU-2858; 11β-Methoxy-EE	35–43	5–20	0.5	2.6	Estrogen
Methylestradiol	17α-Methyl-17β-estradiol	70	44	?	?	Estrogen
Diethylstilbestrol	DES; Stilbestrol	129.5 (89.1–468)	219.63 (61.2–295)	0.04	0.05	Estrogen
Hexestrol	Dihydrodiethylstilbestrol	153.6 (31–302)	60–234	0.06	0.06	Estrogen
Dienestrol	Dehydrostilbestrol	37 (20.4–223)	56–404	0.05	0.03	Estrogen
Benzestrol (B2)	–	114	?	?	?	Estrogen
Chlorotrianisene	TACE	1.74	?	15.30	?	Estrogen
Triphenylethylene	TPE	0.074	?	?	?	Estrogen
Triphenylbromoethylene	TPBE	2.69	?	?	?	Estrogen
Tamoxifen	ICI-46,474	3 (0.1–47)	3.33 (0.28–6)	3.4–9.69	2.5	SERM
Afimoxifene	4-Hydroxytamoxifen; 4-OHT	100.1 (1.7–257)	10 (0.98–339)	2.3 (0.1–3.61)	0.04–4.8	SERM
Toremifene	4-Chlorotamoxifen; 4-CT	?	?	7.14–20.3	15.4	SERM
Clomifene	MRL-41	25 (19.2–37.2)	12	0.9	1.2	SERM
Cyclofenil	F-6066; Sexovid	151–152	243	?	?	SERM
Nafoxidine	U-11,000A	30.9–44	16	0.3	0.8	SERM
Raloxifene	–	41.2 (7.8–69)	5.34 (0.54–16)	0.188–0.52	20.2	SERM
Arzoxifene	LY-353,381	?	?	0.179	?	SERM
Lasofoxifene	CP-336,156	10.2–166	19.0	0.229	?	SERM
Ormeloxifene	Centchroman	?	?	0.313	?	SERM
Levormeloxifene	6720-CDRI; NNC-460,020	1.55	1.88	?	?	SERM
Ospemifene	Deaminohydroxytoremifene	0.82–2.63	0.59–1.22	?	?	SERM
Bazedoxifene	–	?	?	0.053	?	SERM
Etacstil	GW-5638	4.30	11.5	?	?	SERM
ICI-164,384	–	63.5 (3.70–97.7)	166	0.2	0.08	Antiestrogen
Fulvestrant	ICI-182,780	43.5 (9.4–325)	21.65 (2.05–40.5)	0.42	1.3	Antiestrogen
Propylpyrazoletriol	PPT	49 (10.0–89.1)	0.12	0.40	92.8	ERα agonist
16α-LE2	16α-Lactone-17β-estradiol	14.6–57	0.089	0.27	131	ERα agonist
16α-Iodo-E2	16α-Iodo-17β-estradiol	30.2	2.30	?	?	ERα agonist
Methylpiperidinopyrazole	MPP	11	0.05	?	?	ERα antagonist
Diarylpropionitrile	DPN	0.12–0.25	6.6–18	32.4	1.7	ERβ agonist
8β-VE2	8β-Vinyl-17β-estradiol	0.35	22.0–83	12.9	0.50	ERβ agonist
Prinaberel	ERB-041; WAY-202,041	0.27	67–72	?	?	ERβ agonist
ERB-196	WAY-202,196	?	180	?	?	ERβ agonist
Erteberel	SERBA-1; LY-500,307	?	?	2.68	0.19	ERβ agonist
SERBA-2	–	?	?	14.5	1.54	ERβ agonist
Coumestrol	–	9.225 (0.0117–94)	64.125 (0.41–185)	0.14–80.0	0.07–27.0	Xenoestrogen
Genistein	–	0.445 (0.0012–16)	33.42 (0.86–87)	2.6–126	0.3–12.8	Xenoestrogen
Equol	–	0.2–0.287	0.85 (0.10–2.85)	?	?	Xenoestrogen
Daidzein	–	0.07 (0.0018–9.3)	0.7865 (0.04–17.1)	2.0	85.3	Xenoestrogen
Biochanin A	–	0.04 (0.022–0.15)	0.6225 (0.010–1.2)	174	8.9	Xenoestrogen
Kaempferol	–	0.07 (0.029–0.10)	2.2 (0.002–3.00)	?	?	Xenoestrogen
Naringenin	–	0.0054 (<0.001–0.01)	0.15 (0.11–0.33)	?	?	Xenoestrogen
8-Prenylnaringenin	8-PN	4.4	?	?	?	Xenoestrogen
Quercetin	–	<0.001–0.01	0.002–0.040	?	?	Xenoestrogen
Ipriflavone	–	<0.01	<0.01	?	?	Xenoestrogen
Miroestrol	–	0.39	?	?	?	Xenoestrogen
Deoxymiroestrol	–	2.0	?	?	?	Xenoestrogen
β-Sitosterol	–	<0.001–0.0875	<0.001–0.016	?	?	Xenoestrogen
Resveratrol	–	<0.001–0.0032	?	?	?	Xenoestrogen
α-Zearalenol	–	48 (13–52.5)	?	?	?	Xenoestrogen
β-Zearalenol	–	0.6 (0.032–13)	?	?	?	Xenoestrogen
Zeranol	α-Zearalanol	48–111	?	?	?	Xenoestrogen
Taleranol	β-Zearalanol	16 (13–17.8)	14	0.8	0.9	Xenoestrogen
Zearalenone	ZEN	7.68 (2.04–28)	9.45 (2.43–31.5)	?	?	Xenoestrogen
Zearalanone	ZAN	0.51	?	?	?	Xenoestrogen
Bisphenol A	BPA	0.0315 (0.008–1.0)	0.135 (0.002–4.23)	195	35	Xenoestrogen
Endosulfan	EDS	<0.001–<0.01	<0.01	?	?	Xenoestrogen
Kepone	Chlordecone	0.0069–0.2	?	?	?	Xenoestrogen
o,p'-DDT	–	0.0073–0.4	?	?	?	Xenoestrogen
p,p'-DDT	–	0.03	?	?	?	Xenoestrogen
Methoxychlor	p,p'-Dimethoxy-DDT	0.01 (<0.001–0.02)	0.01–0.13	?	?	Xenoestrogen
HPTE	Hydroxychlor;p,p'-OH-DDT	1.2–1.7	?	?	?	Xenoestrogen
Testosterone	T; 4-Androstenolone	<0.0001–<0.01	<0.002–0.040	>5000	>5000	Androgen
Dihydrotestosterone	DHT; 5α-Androstanolone	0.01 (<0.001–0.05)	0.0059–0.17	221–>5000	73–1688	Androgen
Nandrolone	19-Nortestosterone; 19-NT	0.01	0.23	765	53	Androgen
Dehydroepiandrosterone	DHEA; Prasterone	0.038 (<0.001–0.04)	0.019–0.07	245–1053	163–515	Androgen
5-Androstenediol	A5; Androstenediol	6	17	3.6	0.9	Androgen
4-Androstenediol	–	0.5	0.6	23	19	Androgen
4-Androstenedione	A4; Androstenedione	<0.01	<0.01	>10000	>10000	Androgen
3α-Androstanediol	3α-Adiol	0.07	0.3	260	48	Androgen
3β-Androstanediol	3β-Adiol	3	7	6	2	Androgen
Androstanedione	5α-Androstanedione	<0.01	<0.01	>10000	>10000	Androgen
Etiocholanedione	5β-Androstanedione	<0.01	<0.01	>10000	>10000	Androgen
Methyltestosterone	17α-Methyltestosterone	<0.0001	?	?	?	Androgen
Ethinyl-3α-androstanediol	17α-Ethynyl-3α-adiol	4.0	<0.07	?	?	Estrogen
Ethinyl-3β-androstanediol	17α-Ethynyl-3β-adiol	50	5.6	?	?	Estrogen
Progesterone	P4; 4-Pregnenedione	<0.001–0.6	<0.001–0.010	?	?	Progestogen
Norethisterone	NET; 17α-Ethynyl-19-NT	0.085 (0.0015–<0.1)	0.1 (0.01–0.3)	152	1084	Progestogen
Norethynodrel	5(10)-Norethisterone	0.5 (0.3–0.7)	<0.1–0.22	14	53	Progestogen
Tibolone	7α-Methylnorethynodrel	0.5 (0.45–2.0)	0.2–0.076	?	?	Progestogen
Δ⁴-Tibolone	7α-Methylnorethisterone	0.069–<0.1	0.027–<0.1	?	?	Progestogen
3α-Hydroxytibolone	–	2.5 (1.06–5.0)	0.6–0.8	?	?	Progestogen
3β-Hydroxytibolone	–	1.6 (0.75–1.9)	0.070–0.1	?	?	Progestogen
Footnotes:^a = (1)Binding affinity values are of the format "median (range)" (# (#–#)), "range" (#–#), or "value" (#) depending on the values available. The full sets of values within the ranges can be found in the Wiki code. (2) Binding affinities were determined via displacement studies in a variety ofin-vitro systems withlabeled estradiol and humanERα andERβ proteins (except the ERβ values from Kuiper et al. (1997), which are rat ERβ).Sources: See template page.

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Selected biological properties of endogenous estrogens in rats
Estrogen	ERTooltip Estrogen receptor RBATooltip relative binding affinity (%)	Uterine weight (%)	Uterotrophy	LHTooltip Luteinizing hormone levels (%)	SHBGTooltip Sex hormone-binding globulin RBATooltip relative binding affinity (%)
Control	–	100	–	100	–
Estradiol (E2)	100	506 ± 20	+++	12–19	100
Estrone (E1)	11 ± 8	490 ± 22	+++	?	20
Estriol (E3)	10 ± 4	468 ± 30	+++	8–18	3
Estetrol (E4)	0.5 ± 0.2	?	Inactive	?	1
17α-Estradiol	4.2 ± 0.8	?	?	?	?
2-Hydroxyestradiol	24 ± 7	285 ± 8	+^b	31–61	28
2-Methoxyestradiol	0.05 ± 0.04	101	Inactive	?	130
4-Hydroxyestradiol	45 ± 12	?	?	?	?
4-Methoxyestradiol	1.3 ± 0.2	260	++	?	9
4-Fluoroestradiol^a	180 ± 43	?	+++	?	?
2-Hydroxyestrone	1.9 ± 0.8	130 ± 9	Inactive	110–142	8
2-Methoxyestrone	0.01 ± 0.00	103 ± 7	Inactive	95–100	120
4-Hydroxyestrone	11 ± 4	351	++	21–50	35
4-Methoxyestrone	0.13 ± 0.04	338	++	65–92	12
16α-Hydroxyestrone	2.8 ± 1.0	552 ± 42	+++	7–24	<0.5
2-Hydroxyestriol	0.9 ± 0.3	302	+^b	?	?
2-Methoxyestriol	0.01 ± 0.00	?	Inactive	?	4
Notes: Values are mean ± SD or range.ER RBA =Relative binding affinity toestrogen receptors of ratuterine cytosol. Uterine weight = Percentage change in uterine wet weight ofovariectomized rats after 72 hours with continuous administration of 1 μg/hour viasubcutaneously implanted osmotic pumps.LH levels =Luteinizing hormone levels relative to baseline of ovariectomized rats after 24 to 72 hours of continuous administration via subcutaneous implant.Footnotes:^a =Synthetic (i.e., notendogenous).^b = Atypical uterotrophic effect which plateaus within 48 hours (estradiol's uterotrophy continues linearly up to 72 hours).Sources:^[6]^[7]^[8]^[9]^[10]^[11]^[12]^[13]^[14]

Biosynthesis

[edit]

17α-Estradiol is produced fromepitestosterone byaromatase at locations not fully characterized (known to include the brain). Where and how epitestosterone is made is not fully understood. Conversion between 17α-estradiol andestrone seems to occur, but the enzymes remain unidentified.^[5]

Occurrence

[edit]

17α-E2 is found in mice brain, regardless of age and sex, at concentrations much higher than 17β-E2. Gonadectomized and/or adrenalectomized mice continue to have high brain levels of 17α-E2.^[5]

17α-E2 poorly binds α-fetoprotein, unlike 17β-E2.^[5]

17α-E2 is excreted in urine. It was initially discovered in pregnant mare urine (seeconjugated estrogens).^[5] In a 2022 study, all six tested human urine samples contained detectable amounts of 17α-E2.^[15]

Function

[edit]

As mentioned before, 17α-estradiol binds to ERα and ERβ with moderate affinity but very low activity. It binds to the brain-localized ER-X with significant activity and may play a neuroprotective role.^[5]

In the uterus, 17α-estradiol causes smooth muscle relaxation via a nongenomic pathway, similarly to 17β-estradiol; the effect is weaker with no antagonization. It antagonizes the hypertrophic response of 17β-estradiol, probably by acting as an antiestrogen by virtue of its very low activity.^[16]

Aging

[edit]

Supplementation of 17α-Estradiol increases the median lifespan of male mice by 19%, it has no effect on female lifespan. 17α-Estradiol alleviates age-related metabolic and inflammatory dysfunction and improves glucose tolerance in male mice, it does not lead to feminization of male mice.^[17]^[18]^[19] The exact reason for this sex-specific increase in lifespan is unknown, however, the effect on male lifespan is not visible in castrated mice. This suggests that the metabolic response to 17α-Estradiol requires the presence of male gonadal hormones.^[20] The effect of 17α-Estradiol on humans is currently unknown.

References

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^J. Elks (14 November 2014).The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. pp. 897–.ISBN 978-1-4757-2085-3.
^^a ^b ^cZhu BT, Han GZ, Shim JY, Wen Y, Jiang XR (2006). "Quantitative structure-activity relationship of various endogenous estrogen metabolites for human estrogen receptor alpha and beta subtypes: Insights into the structural determinants favoring a differential subtype binding".Endocrinology.147 (9):4132–50.doi:10.1210/en.2006-0113.PMID 16728493.
^Ralph M. Trüeb, Won-Soo Lee (13 February 2014).Male Alopecia: Guide to Successful Management. Springer Science & Business Media. pp. 93–.ISBN 978-3-319-03233-7.
^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.
^^a ^b ^c ^d ^e ^fToran-Allerand CD, Tinnikov AA, Singh RJ, Nethrapalli IS (2005)."17alpha-estradiol: a brain-active estrogen?".Endocrinology.146 (9):3843–50.doi:10.1210/en.2004-1616.PMID 15947006.
^Martucci C, Fishman J (March 1976). "Uterine estrogen receptor binding of catecholestrogens and of estetrol (1,3,5(10)-estratriene-3,15alpha,16alpha,17beta-tetrol)".Steroids.27 (3):325–333.doi:10.1016/0039-128x(76)90054-4.PMID 178074.S2CID 54412821.
^Martucci C, Fishman J (December 1977). "Direction of estradiol metabolism as a control of its hormonal action--uterotrophic activity of estradiol metabolites".Endocrinology.101 (6):1709–1715.doi:10.1210/endo-101-6-1709.PMID 590186.
^Fishman J, Martucci C (December 1978)."Differential biological activity of estradiol metabolites".Pediatrics.62 (6 Pt 2):1128–1133.doi:10.1542/peds.62.6.1128.PMID 724350.S2CID 29609115.
^Martucci CP, Fishman J (December 1979). "Impact of continuously administered catechol estrogens on uterine growth and luteinizing hormone secretion".Endocrinology.105 (6):1288–1292.doi:10.1210/endo-105-6-1288.PMID 499073.
^Fishman J, Martucci CP (1980). "New Concepts of Estrogenic Activity: the Role of Metabolites in the Expression of Hormone Action". In Pasetto N, Paoletti R, Ambrus JL (eds.).The Menopause and Postmenopause. pp. 43–52.doi:10.1007/978-94-011-7230-1_5.ISBN 978-94-011-7232-5.
^Fishman J, Martucci C (September 1980). "Biological properties of 16 alpha-hydroxyestrone: implications in estrogen physiology and pathophysiology".The Journal of Clinical Endocrinology and Metabolism.51 (3):611–615.doi:10.1210/jcem-51-3-611.PMID 7190977.
^Martucci CP (July 1983). "The role of 2-methoxyestrone in estrogen action".Journal of Steroid Biochemistry.19 (1B):635–638.doi:10.1016/0022-4731(83)90229-7.PMID 6310247.
^Fishman J, Martucci C (1980). "Dissociation of biological activities in metabolites of estradiol". In McLachlan JA (ed.).Estrogens in the Environment: Proceedings of the Symposium on Estrogens in the Environment, Raleigh, North Carolina, U.S.A., September 10-12, 1979. Elsevier. pp. 131–145.ISBN 9780444003720.
^Kuhl H (August 2005). "Pharmacology of estrogens and progestogens: influence of different routes of administration".Climacteric. 8 Suppl 1:3–63.doi:10.1080/13697130500148875.PMID 16112947.S2CID 24616324.
^Tang Z, Liu ZH, Wang H, Dang Z (10 July 2022). "17α-Estradiol, an ignored endogenous natural estrogen in human: Updated estrogen metabolism pathways and its environmental risk analysis".The Science of the Total Environment.829 154693.Bibcode:2022ScTEn.829o4693T.doi:10.1016/j.scitotenv.2022.154693.PMID 35318059.S2CID 247579981.
^Perusquía M, Navarrete E (21 July 2005)."Evidence that 17alpha-estradiol is biologically active in the uterine tissue: antiuterotonic and antiuterotrophic action".Reproductive Biology and Endocrinology.3: 30.doi:10.1186/1477-7827-3-30.PMC 1201169.PMID 16042770.
^Stout MB, Steyn FJ, Jurczak MJ, Camporez JP, Zhu Y, Hawse JR, Jurk D, Palmer AK, Xu M, Pirtskhalava T, Evans GL, de Souza Santos R, Frank AP, White TA, Monroe DG (2016-01-24)."17α-Estradiol Alleviates Age-related Metabolic and Inflammatory Dysfunction in Male Mice Without Inducing Feminization".The Journals of Gerontology Series A: Biological Sciences and Medical Sciences.72 (1):3–15.doi:10.1093/gerona/glv309.ISSN 1079-5006.PMC 5155656.PMID 26809497.
^Garratt M, Bower B, Garcia GG, Miller RA (December 2017)."Sex differences in lifespan extension with acarbose and 17-α estradiol: gonadal hormones underlie male-specific improvements in glucose tolerance and mTORC 2 signaling".Aging Cell.16 (6):1256–1266.doi:10.1111/acel.12656.ISSN 1474-9718.PMC 5676051.PMID 28834262.
^Strong R, Miller RA, Antebi A, Astle CM, Bogue M, Denzel MS, Fernandez E, Flurkey K, Hamilton KL, Lamming DW, Javors MA, Magalhães JP, Martinez PA, McCord JM, Miller BF (October 2016)."Longer lifespan in male mice treated with a weakly estrogenic agonist, an antioxidant, an α-glucosidase inhibitor or a Nrf2-inducer".Aging Cell.15 (5):872–884.doi:10.1111/acel.12496.ISSN 1474-9718.PMC 5013015.PMID 27312235.
^Garratt M, Lagerborg KA, Tsai YM, Galecki A, Jain M, Miller RA (August 2018)."Male lifespan extension with 17-α estradiol is linked to a sex-specific metabolomic response modulated by gonadal hormones in mice".Aging Cell.17 (4) e12786.doi:10.1111/acel.12786.PMC 6052402.PMID 29806096.

Endogenous steroids

Precursors

Corticosteroids

Glucocorticoids	3α,5α-Tetrahydrocorticosterone 5α-Dihydrocorticosterone 11-Deoxycorticosterone 11-Deoxycortisol 11-Ketoprogesterone 21-Deoxycortisol 21-Deoxycortisone Corticosterone Cortisol Cortisone 17α-Hydroxypregnenolone 17α-Hydroxyprogesterone Pregnenolone Progesterone Metabolites:5α-Dihydrocortisol 3α,5α-Tetrahydrocortisol
Mineralocorticoids	5α-Dihydroaldosterone 11-Dehydrocorticosterone (11-oxocorticosterone, 17-deoxycortisone) 11-Deoxycortisol 11-Deoxycorticosterone 11β-Hydroxyprogesterone (21-deoxycorticosterone) 18-Hydroxy-11-deoxycorticosterone 18-Hydroxycorticosterone 18-Hydroxyprogesterone Aldosterone Corticosterone Cortisol

Sex steroids

Androgens	11-Ketodihydrotestosterone 11-Ketotestosterone 7β-Hydroxyepiandrosterone 11β-Hydroxyandrostenedione Adrenosterone (11-ketoandrostenedione) Androstenediol Androstenedione Androsterone Dehydroandrosterone DHEA DHEA sulfate Dihydrotestosterone Epiandrosterone Epitestosterone 16α-Hydroxyandrostenedione 16α-Hydroxy-DHEA 16α-Hydroxy-DHEA sulfate Testosterone Metabolites:3α-Androstanediol 3α-Androstanediol glucuronide 3β-Androstanediol 5β-Dihydrotestosterone 3α-Etiocholanediol 3β-Etiocholanediol Androstanetriols Androstenediol sulfate Androstenetriol Androsterone glucuronide Androsterone sulfate Dihydrotestosterone glucuronide Dihydrotestosterone sulfate Etiocholanedione Etiocholanolone Etiocholanolone glucuronide Epietiocholanolone Testosterone glucuronide Testosterone sulfate
Estrogens	Estranes:Estetrol Estradiol Estrone Estriol 17α-Estradiol 16β-Epiestriol (16β-hydroxyestradiol) 17α-Epiestriol (16α-hydroxy-17α-estradiol) 16β,17α-Epiestriol (16β-hydroxy-17α-estradiol) 2-Hydroxyestradiol 2-Hydroxyestriol 2-Hydroxyestrone 4-Hydroxyestradiol 4-Hydroxyestriol 4-Hydroxyestrone 4-Methoxyestradiol 4-Methoxyestrone 16α-Hydroxyestrone 16β-Hydroxyestrone 16-Ketoestradiol 16-Ketoestrone Others:27-Hydroxycholesterol 3α-Androstanediol 3β-Androstanediol 4-Androstenedione 5-Androstenediol DHEA DHEA sulfate 7-Keto-DHEA 7α-Hydroxy-DHEA 16α-Hydroxy-DHEA Metabolites:2-Methoxyestradiol 2-Methoxyestrone 2-Methoxyestriol 4-Methoxyestriol Estradiol disulfate Estradiol glucuronide Estradiol 3-glucuronide Estradiol 3-glucuronide 17β-sulfate Estradiol sulfate Estradiol 17β-sulfate Estrone glucuronide Estrone sulfate Estriol glucuronide Estriol sulfate Lipoidal estradiol (e.g.,estradiol stearate,estradiol palmitate)
Progestogens	Progesterone 16α-Hydroxyprogesterone 17α-Hydroxyprogesterone 20α-Dihydroprogesterone 20β-Dihydroprogesterone 5α-Dihydroprogesterone 11-Deoxycorticosterone 5α-DHDOC Metabolites:Allopregnanediol Pregnanediol Pregnanediol glucuronide Pregnanetriol

Neurosteroids

Cholestanes:24S-Hydroxycholesterol
Cholesterol

Others

Estrogen receptor modulators

ERTooltip Estrogen receptor

Agonists	Steroidal:2-Hydroxyestradiol 2-Hydroxyestrone 3-Methyl-19-methyleneandrosta-3,5-dien-17β-ol 3α-Androstanediol 3α,5α-Dihydrolevonorgestrel 3β,5α-Dihydrolevonorgestrel 3α-Hydroxytibolone 3β-Hydroxytibolone 3β-Androstanediol 4-Androstenediol 4-Androstenedione 4-Fluoroestradiol 4-Hydroxyestradiol 4-Hydroxyestrone 4-Methoxyestradiol 4-Methoxyestrone 5-Androstenediol 7-Oxo-DHEA 7α-Hydroxy-DHEA 7α-Methylestradiol 7β-Hydroxyepiandrosterone 8,9-Dehydroestradiol 8,9-Dehydroestrone 8β-VE2 10β,17β-Dihydroxyestra-1,4-dien-3-one (DHED) 11β-Chloromethylestradiol 11β-Methoxyestradiol 15α-Hydroxyestradiol 16-Ketoestradiol 16-Ketoestrone 16α-Fluoroestradiol 16α-Hydroxy-DHEA 16α-Hydroxyestrone 16α-Iodoestradiol 16α-LE2 16β-Hydroxyestrone 16β,17α-Epiestriol (16β-hydroxy-17α-estradiol) 17α-Estradiol (alfatradiol) 17α-Dihydroequilenin 17α-Dihydroequilin 17α-Epiestriol (16α-hydroxy-17α-estradiol) 17α-Ethynyl-3α-androstanediol 17α-Ethynyl-3β-androstanediol 17β-Dihydroequilenin 17β-Dihydroequilin 17β-Methyl-17α-dihydroequilenin Abiraterone Abiraterone acetate Alestramustine Almestrone Anabolic steroids (e.g.,testosterone andesters,methyltestosterone,metandienone (methandrostenolone),nandrolone andesters, many others; via estrogenic metabolites) Atrimustine Bolandiol Bolandiol dipropionate Butolame Clomestrone Cloxestradiol Cloxestradiol acetate Conjugated estriol Conjugated estrogens Cyclodiol Cyclotriol DHEA DHEA-S ent-Estradiol Epiestriol (16β-epiestriol, 16β-hydroxy-17β-estradiol) Epimestrol Equilenin Equilin ERA-63 (ORG-37663) Esterified estrogens Estetrol Estradiol Estradiol esters Lipoidal estradiol Polyestradiol phosphate Estramustine Estramustine phosphate Estrapronicate Estrazinol Estriol Estriol esters Polyestriol phosphate Estrofurate Estrogenic substances Estromustine Estrone Estrone esters Estrone methyl ether Estropipate Etamestrol (eptamestrol) Ethinylandrostenediol Ethandrostate Ethinylestradiol Ethinylestradiol 3-benzoate Ethinylestradiol sulfonate Ethinylestriol Ethylestradiol Etynodiol Etynodiol diacetate Hexolame Hippulin Hydroxyestrone diacetate Lynestrenol Lynestrenol phenylpropionate Mestranol Methylestradiol Moxestrol Mytatrienediol Nilestriol Norethisterone Noretynodrel Orestrate Pentolame Prodiame Prolame Promestriene RU-16117 Quinestradol Quinestrol Tibolone Nonsteroidal:(R,R)-THC (S,S)-THC 2,8-DHHHC β-LGND1 β-LGND2 (GTx-878) AC-186 Allenestrol Allenolic acid Benzestrol Bifluranol Bisdehydrodoisynolic acid Butestrol Carbestrol D-15414 DCW234 Diarylpropionitrile Dienestrol Dienestrol diacetate Diethylstilbestrol Diethylstilbestrol esters Dimestrol (dianisylhexene) Dimethylstilbestrol Doisynoestrol (fenocycline) Doisynolic acid Efavirenz Elacestrant ERB-196 (WAY-202196) Erteberel (SERBA-1, LY-500307) Estrobin (DBE) Fenestrel FERb 033 Fosfestrol (diethylstilbestrol diphosphate) Furostilbestrol (diethylstilbestrol difuroate) GTx-758 Hexestrol Hexestrol esters ICI-85966 (Stilbostat) M2613 meso-Butestrol meso-Hexestrol Mestilbol Methallenestril Methestrol Methestrol dipropionate Paroxypropione Pentafluranol Phenestrol Prinaberel (ERB-041, WAY-202041) Propylpyrazoletriol Quadrosilan SC-3296 SC-4289 SERBA-2 SKF-82,958 Terfluranol Triphenylbromoethylene Triphenylchloroethylene Triphenyliodoethylene Triphenylmethylethylene (triphenylpropene) WAY-166818 WAY-169916 WAY-200070 WAY-204688 (SIM-688) WAY-214156 Unknown/unsorted:ERB-26 ERA-45 ERB-79 ZK-283197 Xenoestrogens:Anise-related (e.g.,anethole,anol,dianethole,dianol,photoanethole) Chalconoids (e.g.,isoliquiritigenin,phloretin,phlorizin (phloridzin),wedelolactone) Coumestans (e.g.,coumestrol,psoralidin) Flavonoids (incl.7,8-DHF,8-prenylnaringenin,apigenin,baicalein,baicalin,biochanin A,calycosin,catechin,daidzein,daidzin,ECG,EGCG,epicatechin,equol,formononetin,glabrene,glabridin,genistein,genistin,glycitein,kaempferol,liquiritigenin,mirificin,myricetin,naringenin,penduletin,pinocembrin,prunetin,puerarin,quercetin,tectoridin,tectorigenin) Lavender oil Lignans (e.g.,enterodiol,enterolactone,nyasol (cis-hinokiresinol)) Metalloestrogens (e.g.,cadmium) Pesticides (e.g.,alternariol,dieldrin,endosulfan,fenarimol,HPTE,methiocarb,methoxychlor,triclocarban,triclosan) Phytosteroids (e.g.,digitoxin (digitalis),diosgenin,guggulsterone) Phytosterols (e.g.,β-sitosterol,campesterol,stigmasterol) Resorcylic acid lactones (e.g.,zearalanone,α-zearalenol,β-zearalenol,zearalenone,zeranol (α-zearalanol),taleranol (teranol, β-zearalanol)) Steroid-like (e.g.,deoxymiroestrol,miroestrol) Stilbenoids (e.g.,resveratrol,rhaponticin) Synthetic xenoestrogens (e.g.,alkylphenols,bisphenols (e.g.,BPA,BPF,BPS),DDT,parabens,PBBs,PHBA,phthalates,PCBs) Others (e.g.,agnuside,rotundifuran)
Mixed (SERMsTooltip Selective estrogen receptor modulators)	2-Phenylbenzofuran 2-Phenyl-1-benzothiophene 4'-Hydroxynorendoxifen 27-Hydroxycholesterol Acefluranol Acolbifene Afimoxifene Anordiol Anordrin Arzoxifene Bazedoxifene Brilanestrant Broparestrol Camizestrant Chlorotrianisene Clomifene Clomifenoxide CN-55945-27 Cyclofenil D-15413 Desmethylchlorotrianisene Droloxifene Enclomifene Endoxifen Etacstil (GW-5638, DPC-974) Ethamoxytriphetol (MER-25) Femarelle Fispemifene GW-7604 ICI-55548 Idoxifene Lasofoxifene Levormeloxifene LN-1643 LN-2299 LY-117018 Menerba Miproxifene Miproxifene phosphate MRL-37 Nafoxidine Nitromifene NNC 45-0095 NNC 45-0320 NNC 45-0781 NNC 45-1506 Ormeloxifene Ospemifene Panomifene Pipendoxifene Promensil Raloxifene Rimostil (P-081) Spironolactone SS1010 Tamoxifen TAS-108 (SR-16234) Toremifene Trioxifene TZE-5323 U-11555A U-11634 Y-134 Zindoxifene Zuclomifene
Antagonists	(R,R)-THC 7β-Hydroxy-DHEA Chloroindazole Cytestrol acetate EM-800 (SCH-57050) Epitiostanol ERA-90 ERB-88 Fulvestrant (ICI-182780) Glyceollins (I,II,III,IV) ICI-164384 MDL-101906 Mepitiostane Methylepitiostanol Methylpiperidinopyrazole MIBE Oxabicycloheptene sulfonate Phenytoin PHTPP Prochloraz RU-39411 RU-58668 SS1020 TAS-108 (SR-16234) ZB716 ZK-164015 ZK-191703 Coregulator-binding modulators:ERX-11 Noncompetitive inhibitors:Trilostane

GPERTooltip G protein-coupled estrogen receptor

Agonists	2-Methoxyestradiol 7β-Hydroxyepiandrosterone Afimoxifene (4-hydroxytamoxifen) Aldosterone Atrazine Bisphenol A Daidzein DDT (p,p'-DDT,o',p'-DDE) Diarylpropionitrile Equol Estradiol Ethinylestradiol Fulvestrant (ICI-182780) G-1 Genistein GPER-L1 GPER-L2 Hydroxytyrosol Kepone Nicotinic acid Nicotinamide Nonylphenol Oleuropein PCBs (2,2',5'-PCB-4-OH) Propylpyrazoletriol Quercetin Raloxifene Resveratrol STX Tamoxifen Tectoridin
Antagonists	CCL18 Estriol G-15 G-36 MIBE
Unknown	Diethylstilbestrol Zearalenone

See also: Receptor/signaling modulators; Estrogens and antiestrogens; Androgen receptor modulators; Progesterone receptor modulators; List of estrogens

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Movatterモバイル変換

Biosynthesis

Occurrence

Function

Aging

See also

References