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Interleukin-4RA gene polymorphism is associated with oral mucous membrane pemphigoid

M Carrozzo1, E Dametto, M E Fasano

  • 1Department of Oral Medicine, Center for Oral Health Research, School of Dental Sciences, Newcastle University, Newcastle upon Tyne, UK.

Oral Diseases
|April 6, 2013
PubMed
Abstract

Insights

Genetic variations in cytokine genes, particularly the Interleukin-4 Receptor A (IL-4RA), may influence susceptibility to oral Mucous Membrane Pemphigoid (MMP). The IL-4RA-1902 A/A genotype was more frequent in oral pemphigoid patients, potentially explaining reduced scarring.

Area of Science:

  • Immunogenetics
  • Dermatology
  • Oral Medicine

Background:

  • Mucous Membrane Pemphigoid (MMP) is an autoimmune blistering disease affecting mucous membranes.
  • The role of pro- and anti-inflammatory cytokines in MMP susceptibility is not fully understood.
  • Genetic predisposition may influence the development and clinical presentation of MMP.

Purpose of the Study:

  • To investigate the association between polymorphisms in cytokine genes and susceptibility to predominantly oral MMP (OP) in a Northern Italian population.
  • To identify specific genetic markers that may correlate with OP development.
  • To explore potential genetic links to the fibrotic process in OP.

Main Methods:

  • DNA analysis of 41 MMP patients (29 with exclusively OP) and 140 controls.
  • Study of 13 cytokine genes and 22 single-nucleotide polymorphisms (SNPs) using sequence-specific PCR.
  • Statistical analysis to compare allele and genotype frequencies between patients and controls.

Main Results:

  • No significant differences in most cytokine gene polymorphisms between MMP patients and controls.
  • A significantly higher frequency of the Interleukin-4 Receptor A (IL-4RA) allele A was observed in OP patients compared to controls (P < 0.05).
  • The IL-4RA-1902 A/A genotype was significantly more prevalent in OP patients (89.7% vs. 67.9%, OR: 4.11, P = 0.023).

Conclusions:

  • The IL-4RA-1902 A/A genotype is associated with a reduced response to Interleukin-4 (IL-4).
  • This genotype was found in approximately 90% of oral pemphigoid patients.
  • The findings suggest IL-4RA genotype may partially explain the lower likelihood of scarring in oral pemphigoid, possibly due to IL-4's role in the fibrotic process.
Keywords:
cytokine polymorphismsinterleukin-4mucous membrane pemphigoidoral pemphigoidscarring

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