Abstract
Genetic and environmental factors contribute to the etiopathology of Crohn’s disease (CD) and ulcerative colitis (UC). To identify early-onset susceptibility genes for inflammatory bowel disease, we measured the expression level of 88 genes from different biological contexts in colonic biopsies of pediatric patients and controls using real-time RT-PCR. We found that CXCL9 was highly expressed in the colonic tissue of 3/5 CD and 3/3 UC patients, but none of the controls. A subsequent SNP genotyping study on 114 Caucasian pediatric IBD patients and 120 ethnically matched unaffected adults for the 77147452G→A polymorphism of the CXCL9 gene (rs2276886) revealed a minor allele A frequency of 20.3 % in CD patients compared to 31.3 % in controls (p = 0.016) and 26.3 % in CU (ns). The clinical phenotype assessed by the Montreal classification was not related to the CXCL9 genotype. Children with homozygosity for the wild-type allele had an earlier onset of CD than heterozygous individuals (11.1 yrs vs 13.8 yrs; p = 0.0028). This is the first report of inverse association of the 77147452G→A polymorphism in the CXCL9 gene with pediatric CD. Our data may contribute to a better understanding of the pathophysiology underlying CD.
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© 2008 Springer Medizin Verlag Heidelberg
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Lacher, M., Kappler, R., Berkholz, S., von Schweinitz, D., Koletzko, S. (2008). Die Rolle des CXCL9 Gens bei Kindern und Jugendlichen mit chronisch entzündlicher Darmerkrankung (CED). In: Arbogast, R., Schackert, H.K., Bauer, H. (eds) Chirurgisches Forum 2008. Deutsche Gesellschaft für Chirurgie, vol 37. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-78833-1_3
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DOI: https://doi.org/10.1007/978-3-540-78833-1_3
Publisher Name: Springer, Berlin, Heidelberg
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