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Haplotype of prostaglandin synthase 2/cyclooxygenase 2 is involved in the susceptibility to inflammatory bowel disease

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World Journal of Gastroenterology 2005年第38期11卷 6003-6008页

作者： David G Cox J Bart A Crusius Petra HM Peeters H Bas Bueno-de-Mesquita A Salvador Pe(n|~)a federico canzian International Agency for Research on Cancer Laboratory of Immunogenetics Julius Center for Health Sciences and Primary Care Department of Epidemiology Laboratory of Immunogenetics and Department of Gastroenterology

AIM： Prostaglandin G/H synthase 2 （PTGS2 or COX2） is one of the key factors in the cellular response to inflammation. PTGS2 is expressed in the affected intestinal segments of patients with inflammatory bowel diseases （IBD）. In IBD patients, non-steroidal anti-inflammatory drugs, which have been shown to reduce both the production and activity of PTGS2, may activate IBD and aggravate the symptoms. We aimed at examining genetic variants of PTGS2 that may be risk factors for IBD. METHODS： We genotyped 291 individuals diagnosed with IBD and 367 controls from the Dutch population for the five most frequent polymorphisms of the PTG52 gene. Clinical data were collected on all patients. DNA was extracted via normal laboratory methods. Genotyping was carried out using multiplex PCR followed by the Invader Assay and the 5＇ exonuclease assay （TaqMan）. New polymorphism screening was performed by pre-screening with denaturing high-performance liquid chromatography, followed by fluorescent sequencing. RESULTS： Allele 5209G was weakly associated with Crohn＇s disease （odds ratio [OR] 1.63, 95% confidence interval [CI] 1.03-2.57）, and allele 8473T with ulcerativecolitis （OR 1.50, 95%CI 1.00-2.27）. The haplotype including both alleles showed a strong association with IBD （OR 13.15, 95%CI 3.17-116.15）. This haplotype, while rare （-0.3%） in the general population, is found more frequently in patients （3.5%）. CONCLUSION： Our data suggest that this haplotype of PTGS2 contributes to the susceptibility of IBD.

关键词： Inflammatory bowel disease Prostaglandin G/H synthase Cyclooxygenase SNP Haplotype

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