B cells and plasma cells, effector cells of the humoral immune system, have been stimulated by antigen to transcribe immunoglobulins and produce antibodies in muscle in all three of these diseases.

• 抗原刺激产生免疫球蛋白和抗体的、体液免疫的效应细胞B细胞和浆细胞存在于以上三种肌病患者的肌肉中。