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- W4289745912 abstract "Resistance to endocrine therapies remains an impediment for the treatment of estrogen receptor (ER) positive breast cancer. ER down regulator Fulvestrant has showed great activity to overcome the endocrine resistance. However, Fulvestrant has poor bioavailability due to the hydrophobicity. Identification of novel ER down regulator is still important. Compounds 172 and 183 are two steroidal compounds with androgen scaffold but significantly down regulated ER in multiple breast cancer cell lines. RT-PCR results indicated that both compounds did not affect ER gene expression. Proteasome inhibitor MG132 could attenuate ER down regulation effect of the compounds, suggesting that the ER down regulation was via ubiquitin-proteasomal pathway. Furthermore, compounds 172 and 183 could downregulate ER in endocrine resistant breast cancer cell model long term estrogen deprivation (LTED) MCF-7 cells. Hydrophobicity of compounds 172 and 183 were determined and showed improved solubility compared to Fulvestrant. All these results suggested that compounds 172 and 183 could be potential lead compounds for drug development for the treatment of endocrine resistance breast cancer." @default.
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- W4289745912 date "2022-11-01" @default.
- W4289745912 modified "2023-10-03" @default.
- W4289745912 title "Identification of estrogen receptor down-regulators for endocrine resistant breast cancer" @default.
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- W4289745912 doi "https://doi.org/10.1016/j.jsbmb.2022.106162" @default.
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