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. 2018 Nov 26;8:17375. doi: 10.1038/s41598-018-35745-1

Figure 4.

Figure 4

Effects of the HIF-2α inhibitor, TC-S7009, on hypoxia-induced up-regulation of Flt-1 gene expression in trophoblast-derived choriocarcinoma cell lines. Three cell lines were cultured for 24 h under normoxic or hypoxic conditions in the presence of 0.1% DMSO (vehicle control) or 30 µM HIF-2α-specific inhibitor TC-S7009. (A) Cell viability was assessed to determine the potential toxicity of TC-S7009. Results are expressed as a percentage relative to vehicle-treated cells under normoxic or hypoxic conditions. (B) Quantitative real-time PCR analysis of the mRNA expression level of all Flt-1 transcript variants (FLT-1). FLT-1 mRNA expression level was calculated by normalizing to β-actin mRNA and represented as a fold change relative to vehicle-treated cells under normoxic conditions. (C) Western blot analysis of HIF-1α/2α protein expression levels in whole cell lysates derived from three choriocarcinoma cell lines. β-actin was used as a loading control. Uncropped images of Western blots are presented in Supplementary Fig. S5. All values are represented as the means ± SD (n = 3). Asterisks indicate a significant difference (P < 0.05).