Abstract
This study is the first to demonstrate the presence of cholesteryl ester synthetase activity in the gallbladder epithelium. Using epithelium of the guinea pig gallbladder, the study demonstrated that the enzyme was localized mainly in the particulate fraction. The enzyme required CoA and ATP for activity and displayed a pH optimum of 7.0. The uptake of biliary cholesterol by gallbladder (shown by other investigators) and the presence of cholesteryl ester synthetase activity (demonstrated in this study) suggest that the gallbladder epithelium has an active role which might be important in conditions of cholesterol supersaturation in bile.
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