title: Do non-steroidal anti-inflammatory drugs increase colonic permeability?
abstract: Urinary excretion of orally administered lactulose and 51 chromium labelled ethylenediamine tetra-acetate (51Cr-EDTA) was measured in 12 healthy adult subjects and in six patients with ileostomies to assess intestinal permeability. In normal subjects, 24 hour urinary recovery of 51Cr-EDTA was significantly greater than that of lactulose (mean (SEM) 2.27 (0.15) v 0.50 (0.08)% oral dose; p less than 0.001), but in ileostomy patients recovery of the two markers was the same. In normal subjects, therefore, the difference between the two markers may arise from bacterial break-down of lactulose but not of 51Cr-EDTA in the distal bowel, urinary excretion of lactulose representing small intestinal permeation and that of 51Cr-EDTA representing both small and large intestinal permeation. The markers were then given simultaneously to nine patients receiving non-steroidal anti-inflammatory drugs (NSAIDs) for rheumatoid arthritis and osteoarthritis. The 24 hour urinary recovery of 51Cr-EDTA in the patients was significantly greater than normal (4.64 (1.20) v 2.27 (0.15)% oral dose; p less than 0.01), but that of lactulose was not significantly affected. Moreover, the increase in 51Cr-EDTA recovery was most noticeable in the later urine collections. Both of these findings suggest that NSAIDs may increase colonic permeability.
authors.affiliation: Gastrointestinal Laboratory, St Thomas's Hospital, London.
authors.forename: A P
authors.initials: AP
authors.lastname: Jenkins
authors.forename: D R
authors.initials: DR
authors.lastname: Trew
authors.forename: B J
authors.initials: BJ
authors.lastname: Crump
authors.forename: W S
authors.initials: WS
authors.lastname: Nukajam
authors.forename: J A
authors.initials: JA
authors.lastname: Foley
authors.forename: I S
authors.initials: IS
authors.lastname: Menzies
authors.forename: B
authors.initials: B
authors.lastname: Creamer
mesh_terms: D000328:Adult; D000368:Aged; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology* / Q000627:therapeutic use; D001172:Arthritis, Rheumatoid / Q000188:drug therapy / Q000378:metabolism; D003106:Colon / Q000187:drug effects / Q000378:metabolism*; D004492:Edetic Acid / Q000493:pharmacokinetics; D006801:Humans; D007792:Lactulose / Q000493:pharmacokinetics / Q000652:urine; D008875:Middle Aged; D010003:Osteoarthritis / Q000188:drug therapy / Q000378:metabolism; D010539:Permeability / Q000187:drug effects
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D007792:Lactulose; D004492:Edetic Acid