“Myasthenia gravis (MG), an antibody-mediated autoimmune disease of the neuromuscular junction, is characterized by muscle weakness and fatigability and is caused by autoantibodies against muscle nicotinic acetylcholine receptor (AChR). The anti-AChR antibody is produced by T cell-dependent and B cell-mediated pathogenic mechanisms, activates the complement system and leads to inflammation of the postsynaptic muscle membrane.” (Uzawa)