[ELISA kit for detection of biliary vesicular protein and its preliminary clinical application]

To establish a rapid and precise detective method of 33.5 kd vesicular protein and to screen an effective treatment of cholelithiasis.

Specific antibody of the biliary vesicular protein was obtained by immunizing rabbits and enzyme-linked immunosorbent assay (ELISA) kit was developed. The concentrations of 33.5 kd vesicular protein in serum and bile of gallstone patients and control were examined respectively. The effects of Cholagogue Dry Syrup and Eulektrol Capsule on decreasing 33.5 kd vesicular protein were also studied by ELISA kit.

One-step ELISA equation was Y=0.035 X (r=0.99). The vesicular protein concentrations in serum and bile of cholesterol gallstone group [(179.8+/-97.9) mg/L and (213.4+/-70.1) mg/L respectively] were significantly (P<0.05) higher than in the pigment stone group and control. Data showed that, with 2-week administration, Cholagogue Dry Syrup significantly decreased both biliary and serum 33.5 kd vesicular protein of cholesterol gallstone patients, while Eulekrol Capsule and control groups didn't have the same results.

The concentrations of 33.5 kd protein are different in cholesterol gallstone patients and healthy groups which might be related to cholesterol nucleation process. Cholagogue Dry Syrup is of cholagogic and litholytic effect by decreasing biliary lithogenesis.