[HLA polymorphism and Behçet's disease in Moroccan population]
N Bennani1, O Atouf, N Benseffaj
1Unité d'immunologie, service de transfusion sanguine et d'hémovigilance, hôpital Ibn Sina, CHU de Rabat, Rabat, Maroc. pegy_nai@yahoo.fr
Pathologie-Biologie
|November 29, 2008
Summary
The HLA-B51 allele is strongly associated with Behçet disease in the Moroccan population. Other human leukocyte antigen (HLA) alleles may influence susceptibility or protection against this inflammatory condition.
Area of Science:
- Immunogenetics
- Human Leukocyte Antigen (HLA) complex
- Autoimmune diseases
Context:
- Behçet disease is a multisystemic inflammatory disorder with a complex etiology.
- Genetic factors, particularly HLA alleles, are known to influence susceptibility to Behçet disease.
- The Moroccan population represents a distinct genetic background for studying HLA associations.
Purpose:
- To investigate the association between specific human leukocyte antigen (HLA) class I and II alleles and Behçet disease in a Moroccan cohort.
- To determine the correlation of HLA allele distribution with clinical manifestations and sex in patients with Behçet disease.
Summary:
- The study identified HLA-B51 as a significant predisposing allele for Behçet disease in Moroccans, with specific alleles like -A2, -B5102, -B58, and -B72 also showing predisposition.
- Conversely, alleles A23, -A33, -B18, -B41, and -B49 demonstrated a negative correlation, suggesting a protective role.
- Sex-specific associations were observed, with alleles A2 and -B72 linked to males, and -A68 and -B58 to females, while -B51 and -B5102 were associated with both genders.
- Clinical manifestations were linked to specific alleles: B51 with mucous issues, B72 with vasculitis, and B58 with cutaneous symptoms.
- The haplotype A2-B51 showed a strong positive correlation with Behçet disease.
- No significant association was found for DRB1* alleles, but DQB1*02 appeared to offer protection.
Impact:
- This research elucidates the specific genetic landscape of Behçet disease in the Moroccan population, highlighting the crucial role of HLA-B51.
- Findings contribute to understanding the genetic underpinnings of Behçet disease, potentially aiding in risk stratification and personalized medicine approaches.
- Identifies potential genetic markers for disease susceptibility and protection, paving the way for further etiological research.
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