Prevalence of serum anti-myeloperoxidase antineutrophil cytoplasmic antibodies (MPO-ANCA) in patients with Graves' disease treated with propylthiouracil and thiamazole.
Patients with Graves' disease (n = 61) treated with propylthiouracil (PTU) or thiamazole (MMI) were studied retrospectively to investigate differences in the prevalence of anti-myeloperoxidase anti-neutrophil cytoplasmic antibodies (MPO-ANCA) in relation to treatment with anti-thyroid drugs. The patients were divided into two groups: PTU-treated group (n = 32) and MMI-treated group (n = 29). There were no significant differences between the two groups in terms of age, gender distribution, or duration of treatment. In the PTU group, 8/32 (25%) patients were positive for MPO-ANCA, whereas in the MMI group, 1/29 (3.4%) patients were positive. There were no significant differences in age, duration, or dosage between the MPO-ANCA positive and negative patients. Most of the MPO-ANCA positive patients were asymptomatic, except for two patients in whom rheumatic arthritis or membranous glomerulonephritis developed. None of the MPO-ANCA positive patients were diagnosed as having classical ANCA-associated vasculitis. Thus, there is a high frequency of MPO-ANCA in patients with Graves' disease treated with PTU, compared with patients treated with MMI, although classical ANCA-associated vasculitis develops in only a few MPO-ANCA positive patients.
Division of Endocrinology and Metabolism, Department of Medicine, Sapporo City General Hospital, Kita-11, Nishi-13, Chuo-Ku, Sapporo 060-8604, Japan.
Norio
N
Wada
Masaya
M
Mukai
Michifumi
M
Kohno
Atsushi
A
Notoya
Tomohiro
T
Ito
Narihito
N
Yoshioka
D000328:Adult; D000906:Antibodies / Q000097:blood*; D019268:Antibodies, Antineutrophil Cytoplasmic / Q000097:blood*; D013956:Antithyroid Agents / Q000627:therapeutic use*; D005260:Female; D006111:Graves Disease / Q000097:blood / Q000188:drug therapy* / Q000276:immunology*; D006801:Humans; D008297:Male; D008713:Methimazole / Q000627:therapeutic use*; D008875:Middle Aged; D009195:Peroxidase / Q000276:immunology*; D011441:Propylthiouracil / Q000627:therapeutic use*
D000906:Antibodies; D019268:Antibodies, Antineutrophil Cytoplasmic; D013956:Antithyroid Agents; D008713:Methimazole; D011441:Propylthiouracil; D009195:Peroxidase