In vitro synthesis of antibodies to acetylcholine receptor by peripheral blood mononuclear cells of patients with myasthenia gravis

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Abstract
We studied the in vitro synthesis of antibodies to acetylcholine receptor (anti-AChR) by peripheral blood mononuclear cells (PBM) of patients with myasthenia gravis (MG) and normal subjects (NS). PBM from three of eight patients with generalized MG (MG-G) synthesized anti-AChR in vitro in the absence of pokeweed mitogen (PWM), and seven of eight did so in the presence of PWM. In individual subjects with MG-G, the levels of anti-AChR secreted in vitro by PBM correlated with serum anti-AChR antibody levels (r = 0.77) but not with the amount of IgG secreted in vitro (r = 0.44). No anti-AChR secretion was seen in culture of PBM from a patient with ocular MG, a patient with thymoma without MG, or six NS.

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