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17-Epiestriol

Cat. No. M7786
17-Epiestriol Structure
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Biological Activity

17-epiestriol is an estradiol metabolite and a selective estrogen receptor (ER) beta agonist.

Chemical Information
Molecular Weight 288.38
Formula C18H24O3
CAS Number 1228-72-4
Storage Powder          -20°C   3 years ;  4°C   2 years
In solvent       -80°C   6 months ;  -20°C   1 month
Conversion of different model animals based on BSA (PMID: 27057123)
Species Mouse Rat Rabbit Guinea pig Hamster Dog
Weight (kg) 0.02 0.15 1.8 0.4 0.08 10
Body Surface Area (m2) 0.007 0.025 0.15 0.05 0.02 0.5
Km factor 3 6 12 8 5 20
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.

References

[1] M Constanza Camargo, et al. Urinary estrogen metabolites and gastric cancer risk among postmenopausal women

[2] Nina Sneitz, et al. Regiospecificity and stereospecificity of human UDP-glucuronosyltransferases in the glucuronidation of estriol, 16-epiestriol, 17-epiestriol, and 13-epiestradiol

[3] Tapan K Mukherjee, et al. 17-epiestriol, an estrogen metabolite, is more potent than estradiol in inhibiting vascular cell adhesion molecule 1 (VCAM-1) mRNA expression

[4] R S Mathur, et al. Metabolism of steroid estrogens in the hen. II. Conversion in vivo of estradiol-17-alpha-4-14C-17-beta-3H to 17-epiestrol-4-14C-17 beta-3H and 16,17-epiestriol-4-14C-17 beta-3H

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