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Cytokine polymorphisms in patients with pemphigus.
Yanina Eberhard1, Elisa Burgos, Julio Gagliardi
1Immunology, Clinical Biochemistry, School of Chemical Science, National University of Cordoba, Haya de la Torre esquina, Medina Allende Ciudad Universitaria, Cordoba, 5000, Argentina.
Archives of Dermatological Research
|January 15, 2005
Summary
Genetic variations in interleukin-10 (IL-10) are linked to pemphigus development. Specifically, the IL-10 (-819) T allele and a low-producer haplotype (A/T) were more frequent in pemphigus patients, suggesting a potential predisposition.
Area of Science:
- Immunogenetics
- Dermatology
- Molecular Biology
Background:
- Pemphigus is an autoimmune blistering disease.
- Genetic factors, including cytokine polymorphisms, may influence pemphigus susceptibility.
- Tumor necrosis factor alpha (TNF-alpha), transforming growth factor beta1 (TGF-beta1), and interleukin-10 (IL-10) are key immune regulators.
Purpose of the Study:
- To investigate the association between polymorphisms in TNF-alpha, TGF-beta1, and IL-10 genes and the development of pemphigus.
- To identify specific genetic markers that may predispose individuals to pemphigus vulgaris (PV).
Main Methods:
- Genotyping of IL-10 (-1082 G/A; -819 C/T), TGFB1 (codon 10 C/T, codon 25 G/C), and TNFA (-308 G/A) was performed using Amplification Refractory Mutation System-Polymerase Chain Reaction (ARMS-PCR).
- DNA was extracted from whole blood samples of 20 pemphigus patients and 24 healthy controls.
- Statistical analysis, including odds ratios (OR) and 95% confidence intervals (CI), was used to compare allele and haplotype frequencies.
Main Results:
- A significant difference in the distribution of IL-10 (-819) alleles was observed between pemphigus patients and controls (P=0.009), with allele T associated with the disease (OR 3.291).
- This association remained significant when analyzing only pemphigus vulgaris (PV) patients (P=0.012, OR 3.410).
- An increased frequency of the low producer IL-10 haplotype (-1082/-819 A/T) was found in pemphigus patients (OR 2.714) and PV patients (OR 2.667) compared to controls. No other significant associations were found for the analyzed polymorphisms.
Conclusions:
- The IL-10 (-819) T allele and the low producer IL-10 haplotype (-1082/-819 A/T) may be associated with an increased risk of developing pemphigus.
- These findings suggest that specific IL-10 gene polymorphisms might contribute to pemphigus susceptibility, potentially through mechanisms not fully explained by current cytokine production hypotheses.
- Further research is needed to elucidate the exact role of these cytokine polymorphisms and identify potential unknown susceptibility factors in pemphigus pathogenesis.