Fig. 6.

AraC-induced apoptosis is delayed by NGF but not by CNTF. Neurons were cultured with 100 ng/ml CNTF, 20 ng/ml NGF, or with no growth factor additions (none) in the absence (black bars) or presence (hatched bars) of 100 μm araC as indicated. The cells were fixed at 14 hr before staining and counting. Results are the mean ± SD of three independent experiments. A Student–Newman–Keuls multiple comparisons test gave significant differences (***p< 0.001) for all comparisons, except between NGF versus CNTF (bars 1, 3), NGF with araC versus no growth factor additions (bars 2, 5), and CNTF with araC versus no growth factors with araC (bars 4, 6).