Roda A, Pellicciari R, Polimeni C, Cerrè C, Forti GC, Sadeghpour B, Sapigni E, Gioacchini AM, Natalini B. Metabolism, pharmacokinetics, and activity of a new 6-fluoro analogue of ursodeoxycholic acid in rats and hamsters.
Gastroenterology 1995;
108:1204-14. [PMID:
7698590 DOI:
10.1016/0016-5085(95)90221-x]
[Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND/AIMS
The effectiveness of ursodeoxycholic acid in treating biliary liver diseases is limited by low bioavailability and moderate activity. A new analogue of ursodeoxycholic acid was synthesized with a fluorine atom in position 6 because this should have resulted in an analogue more hydrophilic than ursodeoxycholic acid but with similar detergency.
METHODS
After synthesis, detergency, solubility, and lipophilicity of the 6-fluoro analogue in aqueous solution were determined and compared with those of natural analogues. Stability toward 7-dehydroxylation was assessed in human stools, pharmacokinetics and metabolism were evaluated in bile fistula rats and hamsters, accumulation in bile with long-term feeding was assessed in the hamsters, and the ability to prevent the hepatotoxic effects of taurochenodeoxycholic acid was evaluated in bile fistula rats after intraduodenal coinfusion.
RESULTS
6-Fluoro-ursodeoxycholic acid was more stable than its parent molecule toward 7-dehydroxylation, it was efficiently secreted in bile, and its total recovery was very high. With long-term administration of 6-fluoro-ursodeoxycholic acid, taurine and glycine amidates accounted for more than 60% of the total biliary bile acids (15% ursodeoxycholic acid). The 6-fluoro analogue prevented the hepatotoxic effects of taurochenodeoxycholic acid.
CONCLUSIONS
The results suggest that 6-fluoro-ursodeoxycholic acid has considerable potential as a pharmaceutical agent in the treatment of cholestatic liver disease.
Collapse