H,K-ATPase inhibitors decreased IL-13-induced eotaxin-3 protein secretion. A, BEAS-2Bs were pretreated for 2h with PPIs followed by IL-13 stimulation for 48h. Eotaxin-3 levels in supernatants were measured by using ELISA. B, Correlations between the measured IC50 of PPIs for IL-13-induced eotaxin-3 with published ED50 of PPIs for gastric pH42. C, SCH-28080 was used with the same protocol as A. Data represent means ± SEMs of three independent experiments. *P<.05, **P<.01, ***P<.001, ****P<.0001, compared with vehicle-treated/IL-13-stimulated cells (A and C).