Figure 5. Inhibition of Pendrin expression by siRNA reduces IL-17A-induced Cl−/HCO3 − exchange.
A. and B. Normal HBE cells from two different donors were transfected with either non-targeting (scrambled) siRNA (closed circles) or one of two Pendrin-targeting siRNA from Invitrogen: HSS 107794 (siRNA 1, closed squares) and HSS 107796 (siRNA 2, open triangles). After 14 days, cells were tested for Cl−/HCO3 − exchange. Panels A and B represent data from the individual donor. C. To account for differences in baseline pHi, pH was normalized to the mean of the first minute (pHt0) and data were then combined. Normalized mean data encompassing both donors are shown in panel C. D. Quantitative PCR measuring Pendrin mRNA expression in targeting siRNA-treated cells compared with scrambled control siRNA-treated cells. E. Immunoblot comparing Pendrin protein expression in targeting siRNA-treated cells compared with scrambled control siRNA-treated cells.