title: Intestinal absorption of ursodeoxycholic acid in children and adolescents with inflammatory bowel disease.
abstract: BACKGROUND
  Ursodeoxycholic acid absorption in the proximal intestine may be impaired in patients with inflammatory bowel disease.
  
  
  METHODS
  We examined the intestinal absorption of ursodeoxycholic acid by the oral ursodeoxycholic acid tolerance test in 19 children and adolescents with inflammatory bowel disease at various stages, including 8 patients with unoperated Crohn's disease, 3 patients with ileal-resected Crohn's disease, 8 with ulcerative colitis, and 8 healthy control subjects.
  
  
  RESULTS
  Ursodeoxycholic acid malabsorption was present in all patients with unoperated Crohn's disease in the first diagnosed active stage, in 3 of 5 patients in a relapsing active stage, and in 2 of 8 patients in remission. Ursodeoxycholic acid absorption was significantly lower in patients in the first diagnosed active stage than in the healthy controls (p < 0.01) or in patients in remission (p < 0.01). There was no significant difference between healthy controls and the patients in a relapsing active stage or in remission. Ursodeoxycholic acid absorption was abnormal during the first postoperative month in patients with ileal-resected Crohn's disease, but normalized over time. Malabsorption of ursodeoxycholic acid was not observed in any patients with ulcerative colitis.
  
  
  CONCLUSIONS
  These findings suggest that absorption of ursodeoxycholic acid in the proximal intestine is impaired in patients with Crohn's disease and that the oral ursodeoxycholic acid tolerance test is a convenient and useful means of evaluating the absorption of bile acid in the proximal intestine in pediatric patients with ileal or ileocolic Crohn's disease.
authors.affiliation: Department of Pediatrics and Child Health, Kurume University, School of Medicine, Asahimachi, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Fujisawa
authors.forename: A
authors.initials: A
authors.lastname: Kimura
authors.forename: K
authors.initials: K
authors.lastname: Ushijima
authors.forename: E
authors.initials: E
authors.lastname: Nakashima
authors.forename: T
authors.initials: T
authors.lastname: Inoue
authors.forename: Y
authors.initials: Y
authors.lastname: Yamashita
authors.forename: H
authors.initials: H
authors.lastname: Kato
mesh_terms: D000293:Adolescent; D002648:Child; D003093:Colitis, Ulcerative / Q000378:metabolism*; D003424:Crohn Disease / Q000378:metabolism* / Q000601:surgery; D005260:Female; D006801:Humans; D007082:Ileum / Q000601:surgery; D007408:Intestinal Absorption; D007700:Kinetics; D008297:Male; D014580:Ursodeoxycholic Acid / Q000378:metabolism*
chemical_list: D014580:Ursodeoxycholic Acid