Stimulation of ion transport by ascorbic acid through inhibition of 3':5'-cyclic-AMP phosphodiesterase in the corneal epithelium and other tissues.


Ascorbic acid stimulates active transport of Cl-minus by the isolated intact cornea. The effect is not present in corneas previously stimulated by the theophylline, an inhibitor of 3':5"-cyclic-AMP phosphodiesterase (EC, and vice versa, theophylline has no action after stimulation with ascorbic acid. This indicated inhibition of 3':5'-cyclic-AMP… (More)


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