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Cat. No. M3371
Estriol Structure


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100mg USD 70 In stock
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Quality Control
Biological Activity

Estriol is a G-protein coupled estrogen receptor antagonist. It is one of the three main estrogens produced by the human body. It can be a weak or strong estrogen depending on if it is given acutely or chronically when given to immature animals, but is an antagonist when given in combination with estradiol. It may play a role in the development of breast cancer, but based on in vitro research does appear to act as an antagonist to the G-protein coupled estrogen receptor

Cell Experiment
Cell lines SkBr3 cells
Preparation method For the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, culturing cells in 96-well plates under 200 μL of growth medium and at an initial density of 10,000 cells per well. Washing cells once they have attached and further incubated in medium which contains 2.5% charcoal-stripped FBS with the indicated treatment. Changing the medium every 2 days (with treatment). Where applicable,transfecting 200 ng of the indicated plasmids every 2 days before treatments using Fugene6 Reagent, as recommended by the manufacturer. Following 6 days of incubation, adding the assay mixture (10µL per well) which contains 1mg/mL 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) to each well and incubated at 37 ◦C for 4 h in a 5% CO2 atmosphere. The yellow tetrazolium MTT, reduced by metabolically active cells, results in intracellular purple formazan, which is released after overnight incubation with 200 µL 1% sodium dodecyl sulfate in 0.01N HCL and quantified spectrophotometrically by reading absorbance at 570nm using an enzyme-linked immunosorbent assay plate reader.
Concentrations ~100 nM
Incubation time 6 days
Animal Experiment
Animal models mPTEN+/- and wild-type mice
Formulation Estriol is dissolved in ethanol and corn oil.
Dosages 4 μg/g/day
Administration Administrated via s.c.SkBr3 细胞
Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)
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 resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 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 resveratrol of 11.2 mg/kg.

Chemical Information
Molecular Weight 288.39
Formula C18H24O3
CAS Number 50-27-1
Purity 99.43%
Solubility DMSO 45 mg/mL
Storage at -20°C
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