Figure 1

Phosphorylation of Smad2/3 is K _Ca 3.1 dependent. (A) Phosphorylation of Smad2/3 in HLMFs was most abundant after 60 min of stimulation with TGFβ1 (10 ng/ml) (n = 3). (B) Representative Western blot analysis showing the increased phosphorylation of Smad2/3 after 60 min of stimulation with TGFβ1 (10 ng/ml) and its inhibition by TRAM-34 and ICA-17043. Phosphorylation of Smad2/3 was examined by fold change over total Smad2/3 and normalized to β-actin. TGFβ1-dependent increases in phosphorylated Smad2/3 were inhibited by TRAM-34 200 nM (NFC n = 3 and IPF n = 4) (C) and by ICA-17043 100 nM (NFC n = 3 and IPF n = 3) (D). Results are represented as mean ± SEM *P < 0.05, **P < 0.01 (repeated measures ANOVA corrected by Sidaks multiple comparison test).