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  • Title: Association between the DRB1*08032 histocompatibility antigen and methimazole-induced agranulocytosis in Japanese patients with Graves disease.
    Author: Tamai H, Sudo T, Kimura A, Mukuta T, Matsubayashi S, Kuma K, Nagataki S, Sasazuki T.
    Journal: Ann Intern Med; 1996 Mar 01; 124(5):490-4. PubMed ID: 8602707.
    Abstract:
    OBJECTIVE: To determine the association between HLA class II genes and methimazole-induced agranulocytosis in patients with Graves disease. DESIGN: Case-control study. SETTING: Kuma Hospital, which specializes in thyroid diseases, in Kobe, Japan. SUBJECTS: 24 patients with Graves disease who had methimazole-induced agranulocytosis diagnosed by peripheral granulocyte counts of less than 0.5 x 10(9)/L, and 68 patients with Graves disease treated with methimazole, who were free from agranulocytosis. Controls were 525 healthy, unrelated Japanese student volunteers at Kyushu University in Japan. MEASUREMENTS: All HLA class II genes were analyzed for polymorphisms at the DNA level by using the polymerase chain reaction sequence-specific oligonucleotide probes method. The allele frequencies in the agranulocytotic Graves disease group were compared with those in the nonagranulocytotic Graves disease and control groups. RESULTS: A strong positive association was seen in DRB1*08032 between the agranulocytotic group and both the control and nonagranulocytotic Graves disease groups. CONCLUSION: The HLA DRB1*08032 allele was strongly associated with susceptibility to methimazole-induced agranulocytosis, suggesting that cellular autoimmunity may be involved in its development.
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