期刊
JOURNAL OF CLINICAL GASTROENTEROLOGY
卷 55, 期 3, 页码 244-249出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/MCG.0000000000001394
关键词
irritable bowel syndrome; inflammatory bowel disease; mast cell
The density of intramucosal mast cells showed no significant difference between IBS, IBD, and normal control groups. In IBS patients, the number of intramucosal mast cells does not correlate with symptoms.
Goal: We aimed to study the density of intramucosal mast cells in histologically normal colonic mucosa biopsied from patients with a clinical diagnosis of irritable bowel syndrome (IBS). Background: Mast cell activation has been thought to implicate in the pathogenesis of inflammatory bowel disease (IBD). Whether it serves a role in the pathogenesis of IBS remains controversial. Study: A total of 127 colonoscopic mucosal biopsies were immunohistochemically stained, including 51 IBS, 66 IBD, and 10 normal control samples. Intact mast cells were quantified in 3 high power fields (HPF) in areas showing the highest density. Results: CD117 was sensitive in detecting mast cells in colonic mucosa. The mast cell counts in all biopsies ranged from 2 to 60 per HPF (mean=17.5 +/- 7.2). The density of intramucosal mast cells were similar among IBS, IBD and normal control groups (P=0.6733). IBD in remission versus IBS (17.1 +/- 8.0 vs. 18.1 +/- 7.0; P=0.4804), Crohn disease versus ulcerative colitis (17.1 +/- 10.4 vs. 17.2 +/- 5.2; P=0.9463), IBS with diarrhea versus without diarrhea (19.5 +/- 6.3 vs. 16.8 +/- 6.9; P=0.1404). Forty biopsies (31.5%) showing >= 20 mast cells per HPF appeared to equally distribute among various disease groups (P=0.7283). Conclusions: There is no significant difference in the number of intramucosal mast cells between IBS and IBD that show normal colonic biopsies. In IBS patients, the number of intramucosal mast cell does not correlate with symptoms. The mast cell count (>= 20/HPF) is not a reliable criterion for the diagnosis of IBS or for the distinction between patients with IBS and those with IBD in remission.
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