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Interleukin-10 polymorphisms in Spanish patients with IBD.
Laura Fernandez1, Alfonso Martinez, Juan L Mendoza
1Department of Clinical Immunology, Hospital Clinico San Carlos, Madrid, Spain. laura_ffranco@vodafone.es
Inflammatory Bowel Diseases
|July 27, 2005
Summary
Certain Interleukin-10 (IL-10) gene polymorphisms are linked to increased Crohn's disease (CD) risk in the Spanish population. Specifically, IL-10G14 and -1082G alleles significantly elevate susceptibility to CD.
Area of Science:
- Genetics
- Immunology
- Gastroenterology
Background:
- Inflammatory bowel disease (IBD) is a complex polygenic disorder influenced by genetic and environmental factors.
- Interleukin-10 (IL-10), a regulatory cytokine, is implicated in IBD pathogenesis.
- Polymorphic markers in the IL-10 gene's 5'-flanking region may influence disease development.
Purpose of the Study:
- To investigate the association between IL-10 gene polymorphic markers and IBD in a Spanish cohort.
- To determine if specific microsatellites and single nucleotide polymorphisms (SNPs) in the IL-10 gene are linked to ulcerative colitis (UC) or Crohn's disease (CD).
Main Methods:
- Genotyping of 470 IBD patients (242 UC, 228 CD) and 572 controls.
- Analysis of IL-10R and IL-10G microsatellites and SNPs at positions -1082 and -819 in the IL-10 promoter region.
Main Results:
- The IL-10G14 microsatellite allele and the -1082G SNP were significantly more frequent in CD patients compared to controls.
- The combined presence of both the IL-10G14 and -1082G alleles markedly increased the risk of developing CD (OR = 3.18, P = 0.00006).
Conclusions:
- IL-10 gene polymorphisms are associated with susceptibility to Crohn's disease in the Spanish population.
- These findings highlight the role of specific IL-10 genetic variations in CD pathogenesis.