Fig. 5.
PKI 14-22 (PKA inhibitor) completely reverses terbutaline-induced decrease in fractional 3H-GABA release in cultured human airway epithelial (BEAS-2B) cells. Terbutaline (100 μM) treatment decreased fractional 3H-GABA release, and this decrease was completely reversed by co-treatment with the PKA inhibitor PKI 14-22 (1 μM). n = 4, **p < 0.01, *p < 0.05 ANOVA with repeated measures