Premium
Unusual trihydroxy bile acids in the urine of patients treated with chenodeoxycholate, ursodeoxycholate or rifampicin and those with cirrhosis
Author(s) -
Nakashima Toshiaki,
Sano Atsushi,
Seto Yoshifumi,
Nakajima Toshikazu,
Shima Toshihide,
Sakamoto Yoshikuni,
Okuno Tadao,
Kashima Kei,
Hasegawa Takeshi
Publication year - 1990
Publication title -
hepatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.488
H-Index - 361
eISSN - 1527-3350
pISSN - 0270-9139
DOI - 10.1002/hep.1840110215
Subject(s) - urine , cirrhosis , bile acid , hydroxylation , chemistry , urinary system , medicine , rifampicin , biochemistry , enzyme , antibiotics
Abstract Urinary bile acids from 20 patients treated with chenodeoxycholate, 18 treated with ursodeoxycholate, 15 treated with rifampicin and 8 patients with advanced cirrhosis were analyzed by gas‐liquid chromatography and gas‐liquid chromatography‐mass spectrometry. Occurrence rates and amounts of three so‐called unusual trihydroxy bile acids, hyocholate, ursocholate and ω‐muricholate, were increased in patients treated with chenodeoxycholate, ursodeoxycholate or rifampicin and decreased in cirrhotic patients as compared with those in untreated healthy adults. These data suggest that chenodexycholate and ursodeoxycholate are hydroxylated to produce unusual trihydroxy bile acids in bile acid‐loaded humans and that this metabolism may be related to the induction of hepatic microsomal enzymes by rifampicin. In contrast, the hydroxylation of chenodeoxycholate and ursodeoxycholate may be impaired by severe hepatic damage. Because the urine is a secretory pathway for internal bile acids, the occurrence of unusual trihydroxy bile acids in the urine may be used as an indicator of hepatic ability to metabolize “hydrophobic” dihydroxy bile acids their secretory forms.