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Related Experiment Videos

TAP polymorphism in patients with Behçet's disease

M F González-Escribano1, J Morales, J R García-Lozano

  • 1Servicio de Inmunología, Hospital Universitario Virgen del Rocío, Sevilla, Spain.

Annals of the Rheumatic Diseases
|May 1, 1995
PubMed
Summary

Polymorphisms in TAP1 and TAP2 genes may influence Behçet's disease (BD) susceptibility. A specific TAP1C allele was absent in BD patients, and linkage disequilibrium was observed between HLA-DQB1*0501 and TAP2B.

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Area of Science:

  • Immunogenetics
  • Human Genetics
  • Molecular Biology

Background:

  • Behçet's disease (BD) is a multisystem inflammatory disorder with a complex genetic basis.
  • Human Leukocyte Antigen (HLA) genes, particularly HLA-DRB1 and HLA-DQB1, are known to be associated with BD susceptibility.
  • The role of other immune system genes, such as TAP1 and TAP2, in BD pathogenesis requires further investigation.

Purpose of the Study:

  • To investigate the association between polymorphisms in HLA-DRB1, HLA-DQB1, and TAP1 and TAP2 genes and susceptibility to Behçet's disease in a Spanish population.
  • To explore potential linkage disequilibrium between these genetic markers in BD patients.

Main Methods:

  • Genotyping of HLA-DRB1 and HLA-DQB1 loci using polymerase chain reaction/sequence specific oligotyping (PCR/SSO).

Related Experiment Videos

  • Assignment of TAP1 and TAP2 alleles using amplification refractory mutation system-PCR.
  • Comparison of allele frequencies between 58 Spanish BD patients and 116 healthy controls.

    • Main Results:

    • The TAP1C allele was completely absent in BD patients, while present in 12.1% of controls (pcorr < 0.05).
    • A significant linkage disequilibrium was observed between HLA-DQB1*0501 and TAP2B in BD patients (delta = 0.095, pcorr < 0.02), but not in controls.
    • These findings suggest a potential role for TAP1 and TAP2 gene polymorphisms in BD susceptibility.

    Conclusions:

    • The absence of TAP1C alleles in BD patients suggests a potential role for TAP1 polymorphism in BD development.
    • Linkage disequilibrium between HLA-DQB1*0501 and TAP2B in BD patients indicates that susceptibility genes may be inherited as an extended haplotype.
    • Further research is warranted to elucidate the specific mechanisms by which these genetic variations contribute to Behçet's disease pathogenesis.