Figure 2.

Mitochondrial upregulation of PUMA preceded cytochrome c release and caspase-9 activation. A, Western blot analysis showed that immunoreactivity of PUMA in the cytosolic fraction was only slightly detectable at any time point. In contrast, PUMA immunoreactivity significantly increased in the mitochondrial fraction 4 and 24 hours after tGCI (n=4, *P<0.05). β-Actin and COX IV analyses are shown as internal controls. c, control; OD, optical density. B, Western blot analysis showed that nuclear p53 was significantly increased 4 hours after tGCI (n=4, *P<0.05). TFIID analysis is shown as an internal control. C, Western blot analysis revealed that cytosolic cytochrome c and cleaved caspase-9 were significantly increased in the hippocampal CA1 subregion 24 hours after tGCI (n=4, *P<0.05). β-Actin analysis is shown as an internal control.