title: Chronic use of non-steroidal anti-inflammatory drugs does not alter colonic mucosa of patients without diarrhoea.
abstract: BACKGROUND
  Several types of colitis can be NSAID-induced, but whether chronic use of NSAIDs alters colonic mucosa in patients without diarrhoea is not known.
  
  
  METHODS
  Biopsy specimens of rectal mucosa were taken in six patients with rheumatoid arthritis without diarrhoea receiving NSAIDs (group 1, n=6). Patients with rheumatoid arthritis without diarrhoea not receiving NSAIDs (group 2, n=9), and patients undergoing surveillance colonoscopy (group 3, n=23) served as controls. In all patients from the three study groups, intraepithelial lymphocyte count and apoptotic cell count were assessed, and sub-epithelial collagen band thickness was measured. Leucocyte population of lamina propria was evaluated semi-quantitatively. HLA-DR and CD25 expression of mucosal cells was appreciated by immunohistochemistry.
  
  
  RESULTS
  Intraepithelial lymphocyte count was in the normal range in all three group patients, and not statistically different between groups. Apoptotic epithelial cell count was not different between groups. Sub-epithelial collagen band thickness was normal in all the patients. No patient had a marked infiltration of lamina propria by leucocytes, and HLA-DR and CD25 were normally expressed in all patients.
  
  
  CONCLUSIONS
  These results from a small sample of patients suggest that patients without diarrhoea receiving NSAIDs on a long-term basis do not develop microscopic or inflammatory colitis.
authors.affiliation: Department of Gastroenterology, Hôpital Rothschild, Paris, France. laurent.beaugerie@rth.ap-hop-paris.fr
authors.forename: L
authors.initials: L
authors.lastname: Beaugerie
authors.forename: F
authors.initials: F
authors.lastname: Berenbaum
authors.forename: D
authors.initials: D
authors.lastname: Berrebi
authors.forename: J P
authors.initials: JP
authors.lastname: Gendre
authors.forename: A
authors.initials: A
authors.lastname: Prier
authors.forename: G
authors.initials: G
authors.lastname: Kaplan
authors.forename: F P
authors.initials: FP
authors.lastname: Chatelet
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects / Q000627:therapeutic use*; D001172:Arthritis, Rheumatoid / Q000150:complications* / Q000188:drug therapy*; D003092:Colitis / Q000139:chemically induced; D003113:Colonoscopy; D003967:Diarrhea / Q000150:complications*; D005260:Female; D006801:Humans; D007413:Intestinal Mucosa / Q000187:drug effects* / Q000473:pathology; D018655:Lymphocyte Count; D008297:Male; D008875:Middle Aged
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal