Aug 15, 2000

Mucosal 5-aminosalicylic acid concentration inversely correlates with severity of colonic inflammation in patients with ulcerative colitis

G FrieriR Caprilli


The treatment of ulcerative colitis (UC) with 5-aminosalicylic acid (5-ASA) does not have the same therapeutic effect in all patients. We tested the hypothesis that the effectiveness of the drug is related to its mucosal concentration. Twenty one UC patients receiving oral 5-ASA (2.4-3.2 g/day) were enrolled in the study. Four were also receiving topical treatment (2 g/day). Six endoscopic biopsies were taken from the rectum for measurement of 5-ASA concentrations (ng/mg) by HPLC; soluble interleukin 2 receptor (sIL-2R) concentrations (U/ml) were measured by ELISA and histology. Endoscopic and histological appearance was graded on a four point scale (0-3). The Wilcoxon's rank test and Pearson's correlation coefficient were used for statistical analysis. Mucosal concentrations of 5-ASA were significantly higher (p=0.03) in patients with endoscopic scores of 0-1 compared with those with scores of 2-3 (16.1 (range 10.2-45) v 5. 5 (3.5-17.4), respectively) and in patients with lower histological inflammation compared with those with more severe scores (17.4 (10. 5-45) v 8.9 (3.5-17.2), respectively) (p<0.01). In contrast, mucosal sIL2-R concentrations were significantly lower in patients with slight endoscopic and histological lesi...Continue Reading

  • References29
  • Citations65


  • References29
  • Citations65


Mentioned in this Paper

Endoscopy (Procedure)
Entire Rectum
Histology Procedure
Interleukin 6 Receptor
Endoscopic Biopsy
Analgesics, Anti-Inflammatory
Neoplasm of Uncertain or Unknown Behavior of Rectum
Interleukin 2 Receptor, Alpha
Interleukin-2 Receptor Activity

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