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- W2004582112 abstract "<b>Introduction:</b> Crohn’s disease is a chronic inflammatory disorder of the gut. It is assumed that a defective interaction between the bacterial flora of the gut and the innate immune system plays a key role in the pathogenesis of the disease. This may lead to specific histological lesions. The epithelioid granuloma is particularly interesting in this regard as it is also observed in several bacterial infections of the gut. <b>Aims and methods:</b> We hypothesised that genetic or environmental factors with a known influence on inflammation or immunity would lead to an increased prevalence of granulomas. Therefore, surgical specimens from 161 patients were evaluated for the presence of granulomas. Patients were genotyped for the three single nucleotide polymorphisms in caspase recruitment domain 15 (CARD15)/NOD2 associated with CD and for Asp299Gly in Toll-like receptor 4 (TLR4). <b>Results:</b> The overall prevalence of granulomas was 68.9%. We did not find a significant correlation between granulomas and TLR4 or CARD15 variants. The frequency of granulomas increased with more distal disease (63% small bowel, 72% right colon, 88% left colon, 90% rectum; p = 0.01). Granulomas were more frequent in younger patients (odds ratio 0.95 (95% confidence interval 0.92–0.98) p = 0.007). <b>Conclusion:</b> In this study of 161 well documented CD patients, we found no significant association between CARD15 and TLR4 variants and granulomas. This finding seems to refute our initial hypothesis. However, it may be that additional factors are needed for granuloma development. Granulomas may develop only when specific bacterial components are present. Therefore, future research on granuloma pathogenesis should be orientated towards detection and identification of bacterial components in these lesions." @default.
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- W2004582112 date "2005-02-01" @default.
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- W2004582112 title "Epithelioid granulomas, pattern recognition receptors, and phenotypes of Crohn's disease" @default.
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- W2004582112 doi "https://doi.org/10.1136/gut.2004.042572" @default.
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