CAS 15833-07-5: 2-BROMOESTRADIOL,(13S,17S)-2-BROMO-13-METHYL-7,8,9,11,12,13,14,15,16,17-DECAHYDRO-6H-CYCLOPENTA[A]PHENANTHRENE-3,17-DIOL

2-Bromoestradiol, an estrogen 2-hydroxylase inhibitor, reduces the irreversible binding of radiolabeled estradiol metabolite(s) to microsomal proteins [1].

2-Bromo 17β-estradiol is a synthetic estrogen that is used for the treatment of breast cancer. This drug binds to the estrogen receptor, which alters the expression of genes, leading to apoptosis and inhibition of cell proliferation in tissues. 2-Bromo 17β-estradiol has been shown to be more potent than estradiol benzoate (EB) in inhibiting the growth of rat liver microsomes and MCF-7 cells. This drug also leads to an increase in kinetic data and enzyme activities in vitro. The modification of estrogen with bromine may be responsible for its increased potency over EB.

Stability Light Sensitive Applications 17β-Estradiol (E888000) metabolite. An inhibitor of androstenedione aromatization, which is responsible for the conversion of androgens to estrogens. Agonistic ligands for the estrogen receptor in MCF-7 breast cancer cells. References Numazawa, M. et al.: J. Steroid. Biochem. Mol. Biol., 96, 51 (2005); Vollmer, G. et al.: J. Seroid. Biochem. Mol. Biol., 39, 359 (1991); Brueggemeier, R. et al.: J. Steroid. Biochem., 21, 709 (1984)