Synthesis, intestinal absorption and metabolism of sarcosine conjugated ursodeoxycholic acid

Article abstract of DOI:10.1016/0039-128X(84)90030-8

Sarcosine conjugated ursodeoxycholic acid (SUDC) was synthesized and its intestinal absorption and metabolism were studied in rat and hamster. Intestinal absorption study using bile fistula rat shows that more than 90% of SUDC administered intraduodenally was excreted in the bile within 24 hr. No change of the administered bile acid was seen during the absorption from the intestine, the passage of the liver, and the excretion into the bile. When [24-¹⁴C]SUDC and [11,12-³H₂]-ursodeoxycholic acid were administered orally to a hamster, more than 95% of both the administered ¹⁴C and ³H were recovered from the feces within 6 days. Most (77%) of the fecal ¹⁴C-labeled compound was SUDC, whereas 95% of the fecal ³H-labeled compound was unconjugated lithocholic acid. These results indicate that SUDC, unlike taurine or glycine conjugated bile acid, resists bacterial deconjugation and 7-dehydroxylation.