Figure 4.
WSB1 up-regulates HIF-1α activity. (A) HEK293T cells were transfected with the indicated constructs, and HIF-1α level was examined. (Exo) Exogenous; (Endo) endogenous. (B,C) Quantitative PCR (qPCR) analyses of selected HIF-1α targets in HEK293T cells stably transfected with WSB1 cDNA (B) or WSB1 shRNA (C). Expression levels are relative to β-actin; data were normalized to control cells. The results represent the means ± SE of three independent experiments performed in triplicate. (*) P < 0.05; (**) P < 0.01; (***) P < 0.001 versus control cells by one-way ANOVA. (D) The corelation between WSB1 and HIF target gene expression in metastatic melanoma (n = 50), prostate cancer (n = 25), and breast cancer (n = 34) patients (Gene Expression Omnibus data set).