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Related Experiment Videos

TAP1 and TAP2 polymorphism in multiple sclerosis patients

D Middleton1, G Megaw, C Cullen

  • 1Northern Ireland Tissue Typing Service, City Hospital.

Human Immunology
|June 1, 1994
PubMed
Summary
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Genetic variations in TAP1 and TAP2 genes were studied in multiple sclerosis (MS) patients. Specific TAP2 gene homozygosity showed increased frequency in MS patients negative for HLA-DRB1*1501-DQB1*0602 markers.

Area of Science:

  • Immunogenetics
  • Neuroimmunology
  • Human Genetics

Background:

  • Multiple sclerosis (MS) is an autoimmune disease affecting the central nervous system.
  • The human leukocyte antigen (HLA) complex, particularly HLA-DRB1*1501-DQB1*0602, is strongly associated with MS risk.
  • The transporter of antigen processing (TAP) genes (TAP1 and TAP2) play a crucial role in antigen presentation and immune responses.

Purpose of the Study:

  • To investigate the association between TAP1 and TAP2 gene polymorphisms and multiple sclerosis.
  • To compare the frequency of these polymorphisms in MS patients versus a healthy control population.
  • To explore potential correlations between TAP gene variants and the presence or absence of the HLA-DRB1*1501-DQB1*0602 haplotype in MS patients.

Main Methods:

Related Experiment Videos

  • Genotyping of TAP1 and TAP2 gene polymorphisms in a cohort of MS patients and healthy controls.
  • Statistical analysis to compare allele and genotype frequencies between the groups.
  • Stratification of analysis based on HLA-DRB1*1501-DQB1*0602 status.

    • Main Results:

    • A significant association was observed for specific TAP2 gene polymorphisms.
    • Increased frequency of TAP2-379-VAL homozygosity was found in MS patients lacking the HLA-DRB1*1501-DQB1*0602 haplotype.
    • Similarly, TAP2-565-ALA homozygosity was more prevalent in HLA-DRB1*1501-DQB1*0602-negative MS patients.

    Conclusions:

    • TAP1 and TAP2 gene polymorphisms may contribute to the genetic susceptibility of multiple sclerosis.
    • Specific TAP2 homozygous genotypes are associated with MS, particularly in the absence of the major risk haplotype HLA-DRB1*1501-DQB1*0602.
    • These findings suggest a complex interplay between TAP genes and HLA factors in MS pathogenesis.