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ARTICLE |

HLA Immunogenetic Heterogeneity in Black American Patients With Graves' Disease

Vitaya Sridama, MD; Yoshihito Hara, MD; Rene Fauchet, MD; Leslie J. DeGroot, MD
Arch Intern Med. 1987;147(2):229-231. doi:10.1001/archinte.1987.00370020049034.
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• Seventy-three American black patients with Graves' disease were typed for HLA-A, HLA-B, and HLA-DR antigens. There was a slight increase in HLA-DRw6 antigen frequency compared with 238 normal American black controls, but this was not significant after correction for the number of antigens tested. A significant increase in HLA-DR4 and HLA-DRw6 frequency was found in a subgroup of patients with exophthalmos (22.9% and 29.2% compared with 7.6% and 10.1% of normal black controls). There was a significant increase in HLA-DRw6 in a subgroup of patients who were thyroid antibody-positive (26.0%). The increment in HLA-DRw6 was higher in 32 patients who had both exophthalmos and who were antibody positive (37.5%). A significant increase in HLA-DR5 was found in a subgroup of patients who did not have exophthalmos and who were antibody-negative (83.3%). Our findings support previous evidence for immunogenetic heterogeneity in patients with toxic Graves' disease. In American blacks HLA-DRw6 is in some way associated with the disease in contrast to the wellrecognized HLA-DR3 association in whites.

(Arch Intern Med 1987;147:229-231)

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