Abstract
Autoimmune channelopathies are rare neuromuscular diseases that have been characterized clinically for several decades but for which the evidence of associated antibodies has only been recently demonstrated. Ion channels have an important role of activation, inhibition and regulation in neuromuscular transmission. Myasthenia gravis, generally associated with the presence of anti-acetylcholine receptor antibody, is the best-known channelopathy. Other anti-channel antibodies, including voltage-dependent, are associated with several neurological diseases, as illustrated by anti-voltage-gated calcium channels found in Lambert-Eaton myasthenic syndrome and paraneoplastic cerebellar ataxia, and anti-voltage-gated potassium channels found in neuromyotonia, Morvan's syndrome and limbic encephalitis. The treatment of autoimmune channelopathies is logically based on corticosteroids, immunosuppressant drugs, intravenous immunoglobulins and plasmapheresis.
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