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- W4296185143 abstract "C/EBP-homologous protein (CHOP) and histone H3 lysine 4 (H3K4) methylation have been verified to be correlated with apoptosis, whereas their biological function in arsenic-induced hepatocyte apoptosis through the mitochondrial pathway is still unclear. This study aimed to explore the specific regulatory mechanism of CHOP and H3K4me1/2 in arsenic-induced mitochondrial apoptosis in hepatocytes. Apoptosis and proliferation results showed arsenic promoted apoptosis and inhibited cell growth in BRL-3A cells. Meanwhile, arsenic treatment significantly upregulated the 78-kDa glucose-regulated protein (GRP78), CHOP, su(var)-3-9,enhancer-of-zeste,trithorax (SET) domain containing 7/9 (SET7/9), H3K4me1/2, BIM and BAX expression, while markedly downregulated lysine-specific histone demethylase 1 (LSD1) and BCL2 expression. After down-regulating CHOP, LSD1, and (su(var)-3-9,enhancer-of-zeste,trithorax) domain-containing protein 7/9 (SET7/9) in BRL-3A cells by siRNA, silencing CHOP and SET7/9 notably attenuated the pro-apoptotic and anti-proliferative effects of arsenic treatment on BRL-3A cells, which was reversed after inhibiting LSD1. In addition, our results suggested that knockdown of CHOP altered the expression of mitochondrial-associated proteins BCL2 and BIM, whereas knockdown of LSD1 and SET7/8 regulated the level of H3K4me1/2 modification and BAX protein. Coupled with chromatin immunoprecipitation results, we found that the level of CHOP in the promoter regions of BCL2 and BIM was significantly increased in BRL-3A cells exposed to 30 µmol/L NaAsO2 for 24 h, whereas the levels of H3K4me1/2 in the promoter regions of BAX were unchanged. Collectively, these data indicated that arsenic triggered the mitochondrial pathway to induce hepatocyte apoptosis by up-regulating the levels of CHOP and H3K4me1/2." @default.
- W4296185143 created "2022-09-18" @default.
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- W4296185143 date "2022-09-17" @default.
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- W4296185143 title "Roles of C/EBP-homologous protein and histone H3 lysine 4 methylation in arsenic-induced mitochondrial apoptosis in hepatocytes" @default.
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- W4296185143 doi "https://doi.org/10.1177/07482337221127148" @default.
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