Evaluation of permeability enhancement of hydrophilic compounds and macromolecular compounds by bile salts through rabbit corneas in-vitro

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Abstract
The effect of bile salts, sodium taurocholate (TC-Na) and sodium taurodeoxycholate (TDC-Na), on the permeability of hydrophilic compounds and macromolecular compounds through the rabbit cornea in-vitro was examined. 6-Carboxyfluorescein and glutathione were used as low molecular weight hydrophilic model compounds and FITC-dextran (mol. wt 4000) and insulin were used as relatively macromolecular model compounds. TC-Na (2 and 10 mM) marginally increased the corneal permeabilities to hydrophilic compounds and macromolecular compounds. TDC-Na (2 and 10 mM) markedly increased the corneal permeabilities of these compounds.