FIG. 1.

Effect of RSV on amiloride (10 μmol/liter)-sensitive Na⁺ absorption in the mouse trachea. Original Ussing chamber recordings of V_te before and during apical exposure for 1 h to 2 × 10⁴ PFU/ml RSV (A) or control buffer (B). Dashed lines in panels A and B indicate the effects of amiloride. Panel C summarizes the measurements of the amiloride-sensitive Na⁺ current (I_scEq-Amil) obtained under control conditions and after incubation with either control buffer solution or RSV. The data are presented as means ± SEM (with the number of experiments in parentheses). The asterisk indicates a statistically significant difference compared to the control.