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• W3032950470 startingPage "108458" @default.
• W3032950470 abstract "Abstract Our previous studies showed that silibinin promoted activation of caspases to induce apoptosis in human breast cancer MCF-7 cells by down-regulating the protein expression level of estrogen receptor (ER) α and up-regulating ERβ. Recently, it has been reported that silibinin-induced apoptosis also involved nuclear translocation of apoptosis-inducing factor (AIF). Here we report that silibinin induces nuclear translocation of AIF through the down-regulation of ERα and up-regulation of ERβ in a concentration dependent manner in MCF-7 cells. AIF knockdown with siRNA significantly reverses silibinin-induced apoptosis. The nuclear translocation of AIF is enhanced by treatment with MPP, an ERα antagonist, and blocked with PPT, an ERα agonist. In contrast to ERα activity, the nuclear AIF is increased with an ERβ agonist, DPN and blocked with an ERβ antagonist, PHTPP. Autophagy, negatively regulated by ERα, positively controls AIF-mediated apoptosis, as evidenced by the preventive effect of autophagy inhibitor 3-MA and siRNA targeting LC3, on the nuclear translocation of AIF and cell death induced by silibinin co-treatment with or without MPP. In sum we conclude that AIF in nuclei is involved in silibinin-induced apoptosis, and the nuclear translocation of AIF is increased by down-regulated ERα pathway and/or up-regulated ERβ pathway in MCF-7 cells, accompanying up-regulation of autophagy." @default.
• W3032950470 created "2020-06-12" @default.
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• W3032950470 date "2020-08-01" @default.
• W3032950470 modified "2023-09-28" @default.
• W3032950470 title "Estrogen receptors participate in silibinin-caused nuclear translocation of apoptosis-inducing factor in human breast cancer MCF-7 cells" @default.
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• W3032950470 doi "https://doi.org/10.1016/j.abb.2020.108458" @default.
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