HLA-DR associations with Graves' disease in eastern Hungary

Area of Science:

• Immunogenetics
• Endocrinology
• Human Genetics

Background:

• Graves' disease is an autoimmune disorder with known associations to specific human leukocyte antigen (HLA) genes.
• The influence of geographical factors, such as iodine deficiency, on these associations requires further investigation.

Purpose of the Study:

• To investigate the association of HLA antigens (HLA-A, -B, -C, and -DR) with Graves' disease in a Hungarian population from an iodine-deficient region.
• To identify potential new HLA associations, particularly in patients with ophthalmopathy.

Main Methods:

• Human leukocyte antigen (HLA) typing for HLA-A, -B, and -C antigens was performed on 196 Graves' disease patients.
• HLA-DR antigen typing was conducted on 80 of these patients.
• Prevalence of specific HLA antigens was compared between patients and controls, and stratified by the presence of ophthalmopathy.

Main Results:

• Confirmed associations of HLA-B8 and HLA-DR3 with Graves' disease, especially in patients with ophthalmopathy.
• Identified an increased prevalence of HLA-BW35, particularly with HLA-B8, in patients with ophthalmopathy.
• Observed a slight increase in HLA-B8 and HLA-DR7 prevalence among patients with ophthalmopathy.
• Did not find an increased prevalence of HLA-DR5 in patients without ophthalmopathy, contrary to previous reports; instead, a slight decrease was noted.

Conclusions:

• The findings support a dose-dependent role for MHC-linked susceptibility in Graves' disease.
• Specific HLA antigen profiles may influence the development and clinical presentation of Graves' disease, including ophthalmopathy.
• The genetic associations with Graves' disease may be influenced by environmental factors like iodine deficiency.