Figure 1.
BAX and cytochrome c undergo subcellular redistribution during trophic factor withdrawal in immature, but not mature, sympathetic neurons. Neurons were maintained in NGF for ∼5 (immature; DIV 5) or 25 d (mature; DIV 25) and then deprived of NGF in the presence of 50 μM BAF. At the indicated times, neurons were fixed and immunostained for BAX (a–d, i) or cytochrome c (j). All cells were costained with Hoechst 33258 (e–j). The number of cells exhibiting punctate BAX staining or diffuse cytochrome c staining was determined, with 200–250 cells counted for each condition. Mean ± SEM, n ≥ 3. Bar, 5 μm. Please note that a, b, e, and f have been reported previously in Putcha et al. 1999 and are included only for comparison.