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Related Experiment Videos

DX alpha gene polymorphism in Graves' disease.

A P Weetman1, C Roe, A So

  • 1Department of Medicine, Royal Postgraduate Medical School, Hammersmith Hospital, London, U.K.

Tissue Antigens
|January 1, 1988
PubMed
Summary

Human Leukocyte Antigen (HLA)-DX alpha gene polymorphism did not show a primary association with Graves' disease in British patients. The U allele was linked to HLA-DR3 in both patients and controls.

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Area of Science:

  • Immunogenetics
  • Molecular Biology
  • Autoimmune Diseases

Background:

  • Graves' disease is an autoimmune disorder affecting the thyroid.
  • Human Leukocyte Antigen (HLA) genes play a role in immune regulation and susceptibility to autoimmune diseases.
  • Previous studies suggested associations between HLA polymorphisms and other autoimmune conditions.

Purpose of the Study:

  • To investigate the association between Human Leukocyte Antigen (HLA)-DX alpha gene polymorphism and Graves' disease.
  • To determine if specific HLA-DX alpha genotypes or alleles influence susceptibility to Graves' disease.

Main Methods:

  • Southern blotting technique was used to analyze HLA-DX alpha gene polymorphism.
  • Genomic DNA from 49 British patients with Graves' disease and 61 control subjects was analyzed.
  • Taq I digestion identified allelic fragments at 2.1 kb (U) and 1.9 kb (L).

Main Results:

  • Genotype frequencies (UU, UL, LL) for HLA-DX alpha did not differ between Graves' disease patients and controls.
  • No significant difference was observed when patients were stratified by HLA-DR3 status.
  • A significant association was found between the U allele and HLA-DR3 in both control (P<0.05) and Graves' disease (P<0.025) groups.

Conclusions:

  • The Human Leukocyte Antigen (HLA)-DX alpha gene polymorphism is not primarily associated with susceptibility to Graves' disease.
  • The observed association of the U allele with HLA-DR3 is consistent in both healthy individuals and Graves' disease patients.
  • These findings contrast with studies linking HLA-DX alpha polymorphisms to other Human Leukocyte Antigen (HLA)-DR3-associated autoimmune diseases.

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