Accession Number | HMDB00153 |
Common_Name | Estriol |
Description | Estriol is a metabolite of estrone metabolized via 16alpha-hydroxyestrone through the enzyme 16alpha-hydroxysteroid dehydrogenase (EC 1.1.1.147) or to 2- or 4-hydroxyestrone (catechol estrogens) by the action of catecho-O-methyltransferase (EC 2.1.1.6). The latter metabolites can be formed in the brain and may compete with receptors for catecholamines. Metabolites are conjugated with sulfate or glucuronide before excretion by the kidney.
During pregnancy, estriol constitutes 60-70% of the total estrogens, increasing to 300-500-fold in relation to non-pregnant women. The late term human fetus produces relatively large amounts of 16 alphahydroxy DHEA, which serves the mother as a precursor of estriol. It has been shown that 90% of the precursors for the formation of estriol are of fetal origin.
If abnormal maternal serum screening results, specifically low levels of unconjugated estriol in the second trimester are detected, a diagnosis of Smith-Lemli-Opitz syndrome (SLOS),or RSH is suspected. SLOS is an autosomal recessive disorder caused by mutations of the gene encoding 7-dehydrocholesterol reductase (EC 1.3.1.21, DHCR7). (PMID: 16202579, 16112271, 16097001)
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Chemical_IUPAC_Name | (8S,9S,13S,14S,16R,17R)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,16,17-triol |
Chemical Formula | C18H24O3 |
Sample Concentration | 1 |
Mass Value | Not Available |
Mass Unit | mg |
Manufacturer | Quattro_QQQ |
Analyzer | Triple_Quad |
Delivery | Flow_Injection |
Ionization | Positive |
Predicted 1H NMR Spectrum | Download |
Predicted 1H NMR Peaklist | Download |
Predicted 13C NMR Spectrum | Download |
Predicted 13C NMR Peaklist | Download |
Sample Concentration | Not Available |
Mass Value | Not Available |
Mass Unit | Not Available |
Manufacturer | Not Available |
Frequency | Not Available |
1H NMR Spectrum | Not Available |
Sample Concentration | Not Available |
Mass Value | Not Available |
Mass Unit | Not Available |
Manufacturer | Not Available |
Frequency | Not Available |
13C NMR Spectrum | Not Available |
Low Energy Voltage | 10 |
Low Energy Spectrum | Download |
Low Energy Peaklist | Download |
Medium Energy Spectrum | Download |
High Energy Spectrum | Download |