freshly excised colonic epithelia from 1 cf and 3 non-cf subjects were studied in ussing chambers , and a similar difference in amiloride responsiveness noted : pd and short-circuit current declined 33 % +/- 2 % and 37 % +/- 4 % , respectively , in seven tissues from the colons of 3 patients without cf , whereas both pd and short-circuit current were fully inhibited ( 100 % ) in all three tissues from the cf patient .
C0002502
amiloride
C0010674
cf