摘要：Uptake of the angiotensin-converting enzyme (ACE) inhibitor enalapril by rabbit small intestinal brush border membrane vesicles was examined. In the presence of an inward H+ gradient the uptake of this peptide mimetic drug was accelerated and an overshoot phenomenon was observed. The uptake was more stimulated by higher H+ gradient. Initial uptake rate was saturable in the presence of an inward H+ gradient, with apparent Km value of 4.2 mM. These findings suggest the involvement of the H+-coupled carrier-mediated transport in the uptake of enalapril. The uptake was inhibited by ACE inhibitor trandolapril but hardly or only slightly inhibited by aminocephalosporins.
