Durand J. Effects of diphenylamine-2-carboxylate on sodium and chloride transport across bovine tracheal epithelium: studies in monolayers and in the native tissue.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. A, COMPARATIVE PHYSIOLOGY 1989;
94:447-53. [PMID:
2574095 DOI:
10.1016/0300-9629(89)90119-9]
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Abstract
1. The short-circuit current (I0) across monolayers of bovine tracheal epithelial cells is the sum of Na+ absorption and Cl- secretion. 2. Diphenylamine-2-carboxylate (DPC), added to the mucosal side of the native tissue or monolayers induced a rapid, dose-dependent and fully reversible reduction in I0, which reached zero with 3 mM DPC. 3. The blocking effect of DPC was examined during incubation (1) in standard, (2) in Cl(-)-free and (3) in Na+-free solution. Dose response curves revealed that the IC50 was not altered following ion substitution: it was approximately 0.7 mM DPC. 4. Thus, in bovine tracheal epithelium, DPC was an effective blocking agent of both Na+ and Cl- transport.
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