Figure 4

Reduction of HIF-1α and HIF-2α levels leads to differential effects on apoptosis in RCC10 cells. (A) RCC10 cells stably expressing wild-type VHLp30 or expressing a control shRNA targeting luciferase (Luc shRNA) or a pool of two shRNAs targeting either HIF-1α or HIF-2α were created. These cells were grown to confluence and lysed. Cell lysates were equally loaded and separated by SDS-PAGE. Western blots were performed for VHL, HIF-1α, HIF-2α, GLUT-1, and α-tubulin. (B) The RCC10 cell lines described in (A) were grown to confluence and treated with ultraviolet (UV) light and lysed one day later. Cell lysates were equally loaded and separated by SDS-PAGE. Western blots were performed for PARP, cleaved caspase-3, and α-tubulin. (C) The RCC10 cell lines described in (A) were glucose starved for 24 hours as described in Methods. Cell lysates were equally loaded and separated by SDS-PAGE. Western blots were performed for PARP, cleaved caspase-3, and α-tubulin. (D) The RCC10 cell lines described in (A) were serum starved for 2 days as described in Methods. Cell lysates were equally loaded and separated by SDS-PAGE. Western blots were performed for PARP, cleaved caspase-3, and α-tubulin. Similar results were seen with serum starvation for 4 and 6 days (data not shown).