Figure 3. GDNF-induced increase in ascending contraction and concomitant substance P release in rat colon.
Mucosal stroking in the caudad sensory compartment caused stimulus-dependent contraction of circular muscle (left panel) and release of substance P (right panel) in the orad motor compartment. GDNF (10 nM) caused a significant increase in both ascending contraction of circular muscle and concomitant substance P release. Basal release of substance P in the orad motor compartment was 2.8±0.4 fmol 100mg-min-1. Values are mean±SE of 4-5 experiments. Asterisks indicate significance of at least p<0.05.