bFGF inhibits apoptosis induced by OGD in PC12 cells. A. Detection of apoptotic cells by TUNEL (green) and DAPI (blue) staining assay. Bright green dots were deemed apoptosis-positive cells. B. Protein expression of cleaved caspase3 in the sham, OGD and bFGF-treated group. C. Optical density analysis of cleaved caspase3 protein. **represents P<0.01 versus the sham group, and #represents P<0.05 versus the OGD group. D. Analysis of apoptosis in the sham, OGD and bFGF-treated group. *represents P<0.01 versus the sham group, and #represents P<0.01 versus the OGD group. All data represent the mean value ± SEM, n=4.