Figure 5.
PLA2 is essential for nuclear shrinkage in hypoxic cells. (A) PC12 cells were incubated under normoxic (a) or hypoxic (b–h) conditions for 36 h. Before hypoxia, 50 μM zVAD-fmk (Z) and the indicated PLA2 inhibitors were added to the culture medium. Nuclei were visualized under a fluorescence microscope after Hoechst 33342 staining. The average nuclear area is shown under the photographs. Arrows indicate apoptotic nuclei. Bars, 10 μm. (B) As described in Fig. 4 C, the percentage of cells with the indicated nuclear size was plotted.