CAS No. : 362-07-2

(Synonyms: 2-ME2; NSC-659853)

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Cat. No. : HY-12033
M.Wt: 302.41
Formula: C19H26O3
Purity: >98 %
Solubility: H2O : < 0.1 mg/mL (insoluble); DMSO : ≥ 100 mg/mL (330.68 mM)
Introduction of 362-07-2 :

2-Methoxyestradiol (2-ME2), an orally active endogenous metabolite of 17β-estradiol (E2), is an apoptosis inducer and an angiogenesis inhibitor with potent antineoplastic activity. 2-Methoxyestradiol also destablize microtubules. 2-Methoxyestradio, also a potent superoxide dismutase (SOD) inhibitor and a ROS-generating agent, induces autophagy in the transformed cell line HEK293 and the cancer cell lines U87 and HeLa[1][2][3][4][5][6]. IC50 & Target: IC50: 1.2 μM (tubulin/microtubule, in living interphase MCF7 cells)[1] In Vitro: 2-Methoxyestradiol (2-ME) (5-100 μM) inhibits assembly of purified tubulin in a concentration-dependent manner, with maximal inhibition (60%) at 200 μM 2-Methoxyestradiol (2ME2). In living interphase MCF7 cells at the IC50 for mitotic arrest (1.2 μM), 2-Methoxyestradiol significantly suppresses the mean microtubule growth rate, duration and length, and the overall dynamicity, consistent with its effects in vitro, and without any observable depolymerization of microtubules. 2-Methoxyestradiol induces G2-M arrest and apoptosis in many actively dividing cell types while sparing quiescent cells. 2-Methoxyestradiol binds to tubulin at or near the colchicine site, it inhibits microtubule assembly, and high concentrations have been shown to depolymerize microtubules in cells[1].
2-Methoxyestradiol (2-ME) decreases the HIF-1α and HIF-2α nuclear staining in cells cultured under hypoxia. 2-Methoxyestradiol is an anti-angiogenic, anti-proliferative and pro-apoptotic agent that suppresses HIF-1α protein levels and its transcriptional activity. A significant decrease in the growth rate is found in the 10 µM 2-Methoxyestradiol-treated A549 cells in comparison with the DMSO-treated cells (66.2±7.2 and 101.2±2.3%, respectively; p=0.04) at 96 h. A significant increase in apoptosis is observed in cells treated with 10 µM 2-Methoxyestradiol in a normoxic condition in comparison with cells under lower O2 concentration (5.8±0.2%; p=0.003)[2]. In Vivo: To investigate the effect of 2-Methoxyestradiol (2-ME2) on uveitis development, C57BL/6 mice are randomly assigned into two groups and immunized with IRBP peptide. 2ME2 group starts 2-Methoxyestradiol (15 mg/kg) intraperitoneally from day 0 to day 13 while control group is given with vehicle. The disease score of 2-Methoxyestradiol (2ME2) group is 0.30±0.30, significantly lower than that of control group 2.09±0.28 (p<0.05), each group containing 5 mice[3].
Treatment with 2-Methoxyestradiol (60-600 mg/kg/d) results in a dose-dependent inhibition of tumor growth. The percentage of cells with strong pimonidazole-positive staining (+++) is significantly decreased in the 2-Methoxyestradiol-treated group (36.0% for 60 mg/kg/d and 0% for 200 and 600 mg/kg/d) compare with the vehicle-treated group (86.5%). This may be attributed to the dramatic inhibition of tumor growth in a dose-dependent manner following 2-Methoxyestradiol treatment[4].

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