生物活性 | |||
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描述 | Endoxifen Z-isomer hydrochloride, recognized as a pivotal Tamoxifen metabolite, plays a crucial role in delivering the anti-estrogenic effects of Tamoxifen in breast cancer cells that express estrogen receptor-alpha (ERα). It impedes hERG tail currents at 50 mV in a dose-responsive manner, with IC50 values established at 1.6 μM[1]. Furthermore, Endoxifen demonstrates greater potency in inhibiting estrogen target genes in the presence of ERβ. Notably, in patients treated with Tamoxifen exhibiting deficient CYP2D6 activity, low Endoxifen concentrations (20 to 40 nM) significantly reduce estrogen-induced cell proliferation rates when ERβ is expressed, contrasting with the higher concentrations required in the absence of ERβ[2]. |
细胞研究 | |||||
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细胞系 | 浓度 | 检测类型 | 检测时间 | 活动说明 | 数据源 |
MCF7 cells | 10 uM | Function assay | 6 h | Upregulation of ERalpha protein levels in human MCF7 cells at 10 uM after 6 hrs by Western blot method | 24332630 |
MCF7:WS8 cells | Function assay | 48 h | Agonist activity at ER in human MCF7:WS8 cells assessed as GREB1 gene expression at 10'-6 M after 48 hrs by RT-PCR analysis | 24805199 |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
2.44mL 0.49mL 0.24mL |
12.20mL 2.44mL 1.22mL |
24.39mL 4.88mL 2.44mL |
参考文献 |
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