Circulating autoantibody against human myoglobin in polymyositis
M. Nishikai and M. Homma
A passive hemagglutination method for circulating autoantibody to purified
human skeletal muscle myoglobin has been developed. This antibody was
detected in the sera of 22 of 31 patients with polymyositis. The incidence
and the antibody titers were significantly higher than in other myopathies
such as myasthenia gravis (P less than .02), Duchenne-type muscular
dystrophy (P less than .001), and other conditions (P less than .001). This
new antibody test is useful in diagnosing polymyositis.