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Caspase-3 (17/19 kDa) and β-Actin (42 kDa) western blot analysis in cerebellum (A; Ba/F3 cells were used as positive control of caspase 3 activation). TUNEL assay on cerebellum: +DNA ase reaction (used as positive control of TUNEL) exhibits profuse TUNEL-positive cell labeling (red dye). Minimal or null TUNEL-positive labeled cells could be demonstrated in control or cocaine-treated cerebellar samples (B).
