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. 2019 Apr 24;9:6516. doi: 10.1038/s41598-019-42751-4

Figure 4.

Figure 4

Airway surface liquid pH measurements upon SLC26A4 inhibition in WT and F508del bronchial epithelia. CFBE41o cells and Human Bronchial Epithelial (HBE) primary cells were incubated with DMSO vehicle (empty bars) or specific pendrin inhibitor A01 (filled bars) for 6 h. ASL pH was measured after apical addition of 50 µL Ringer’s solution (25 mM HCO3, 5% CO2). DMSO induces a slight ASL acidification in both WT and F508del cells reaching a decrease of 0.2 pH units after 6 h incubation. (A) WT CFBE41o cells. pH = 7.20 ± 0.04 (DMSO) vs. pH = 7.14 ± 0.03 (A01), p = 0.008. (B) F508del CFBE41o cells. pH = 7.03 ± 0.03 (DMSO) vs. pH = 7.06 ± 0.04 (A01), NS. (C) WT HBE primary cells. pH = 7.19 ± 0.01 (DMSO) vs. pH = 7.08 ± 0.02 (A01), p = 0.04. (D) F508del HBE primary cells. pH = 6.99 ± 0.03 (DMSO) vs. pH = 7.02 ± 0.03 (A01), NS. For all conditions, n = 3 in triplicate. Data are presented as mean ± SEM. Statistical significance from unpaired nonparametric Wilcoxon test. *p < 0.05; **p < 0.01; NS: non significant.