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• W2087477583 abstract "We previously reported that hypoxia‐induced MDR in gastric cancer ( GC ) cells is hypoxia‐inducible factor‐1 ( HIF ‐1)‐dependent. However, the exact mechanisms are still unknown. Our previous study revealed that Krüppel‐like factor 8 ( KLF 8), a novel transcription factor, was associated with malignant phenotype in GC cells. KLF 8 is overexpressed in clear cell renal carcinoma lacking von Hippel‐Lindau protein function, which resulted in HIF ‐1 stabilization. Given this association, we hypothesized that KLF 8 contributed to hypoxia‐induced MDR in GC cells. Initial experiments revealed that hypoxia could increase KLF 8 and HIF ‐1α expressions in GC cells, and KLF 8 levels in GC drug‐resistant cell lines were higher than in parental cell lines. Subsequent experiments showed that in normoxia, exogenous KLF8 could promote the MDR phenotype; however, blocking KLF 8 expression could effectively reverse the MDR phenotype induced by hypoxia. Overexpressed KLF8 increased resistance‐associated gene MDR1 mRNA levels, Bcl‐2 and P‐gp protein levels, and decreased Bax and caspase‐3 protein levels in GC cells, and knockout KLF8 reversed these effects. Dual luciferase reporter and ChIP assays showed that KLF8 could promote MDR1 transcriptional activity by combining with KLF8 binding sites located in the upstream of MDR1 transcriptional start site. These results suggest that KLF8 is involved in hypoxia‐induced MDR through inhibiting apoptosis and increasing the drug release rate by directly regulating MDR 1 transcription." @default.
• W2087477583 created "2016-06-24" @default.
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• W2087477583 date "2014-09-01" @default.
• W2087477583 modified "2023-10-13" @default.
• W2087477583 title "Krüppel‐like factor 8 contributes to hypoxia‐induced <scp>MDR</scp> in gastric cancer cells" @default.
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• W2087477583 doi "https://doi.org/10.1111/cas.12483" @default.
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