Evaluation of Helicobacter species in inflammatory bowel disease.

Abstract:

BACKGROUND:Bacteria have been implicated in the pathogenesis of inflammatory bowel disease. Helicobacter species have been shown to cause colitis in animal models and have been identified in human diarrhoeal illness and Crohn's disease. AIM:To determine whether Helicobacter species are present in human inflammatory bowel disease tissue. METHODS:Thirty patients undergoing colonoscopy for clinical reasons were studied. Nine had Crohn's disease, 11 had ulcerative colitis and 10 had histologically normal colons. Tissue was snap-frozen at -70 degrees C. DNA was extracted and examined by five different polymerase chain reaction (PCR) assays that were either genus or species specific for Helicobacter. RESULTS:Analyses of colonic biopsies by two Helicobacter genus-specific PCR assays, two H. pylori-specific assays and a PCR assay designed to amplify fragments of 'H. heilmannii'-like organisms demonstrated that product was not generated by any test. Internal control PCR demonstrated that PCR results for the five assays were not negative due to the presence of residual substances inhibitory to PCR. CONCLUSIONS:Helicobacter species were not identified in this study, using multiple PCRs to eliminate the problems of non-specific cross-reaction. This suggests that Helicobacter species do not play a role in the pathogenesis of inflammatory bowel disease.

journal_name

Aliment Pharmacol Ther

authors

Bell SJ,Chisholm SA,Owen RJ,Borriello SP,Kamm MA

doi

10.1046/j.1365-2036.2003.01703.x

subject

Has Abstract

pub_date

2003-09-01 00:00:00

pages

481-6

issue

5

eissn

0269-2813

issn

1365-2036

pii

1703

journal_volume

18

pub_type

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