(a) The effect of SAG at −50 mV was blocked by bath application of the DGL inhibitor THL (SAG+THL, 101±8% baseline; p>0.05 by one-sample t-test). The 2-way repeated measures ANOVA showed significant interaction between SAG alone and SAG+THL, and a significant effect of THL. Sidak’s post hoc testing revealed the indicated significant differences between individual time; ** p<0.01, ***p<0.001, ***p<0.0001). Representative traces for each condition (1: black trace, 2: gray line) are shown to the right (scale bars 100 pA, 10 ms). (b) SAG loading in the presence of THL significantly decreased, rather than increased, PPR (* p<0.05 by paired t-test).