Figure 2. Mechanisms whereby HIF-2α contributes to an aggressive tumor phenotype.
A, HIF-2α activates expression of genes involved in proliferation, angiogenesis, metastasis, and differentiation. Regulation of TWIST by HIF-2α seems to be controversal. B, HIF-2α selectively activates expression of unknown gene X, which may enhance binding of polysomes to EGFR mRNA and subsequently its translation efficiency. C, HIF-2α enhances c-Myc activities by stabilizing c-Myc-Max complexes, increasing expression of c-Myc targets involved in cell cycle progression. See text for details.