Fig. 4.

A: Western blot showing 5-HT₄ expression in submucosal neuron whole mounts (lane 1) compared with human SH-SY5Y (lane 2, positive control) and murine Neuro2A (lane 3, negative control). B and C: Western blotting did not show differences in procaspase-3 and -9 expression; lane 1: NT; lane 2: 1 nM prucalopride+H₂O₂; lane 3: H₂O₂ alone. D and E: Western blotting showed significant differences in active caspase-3 and -9 expression (**P < 0.001 vs. NT); lane 1: NT; lane 2: 1 nM prucalopride+H₂O₂; lane 3: H₂O₂ alone.