Congenital Myasthenic Syndromes: a Clinical and Treatment Approach
Abstract
Congenital myasthenia syndromes are clinically and genetically heterogeneous but treatable conditions. Careful selection of drug therapy is paramount as the same drug can be effective, ineffective, and even harmful in different congenital myasthenia syndromes. The purpose of this article is to review current treatment options for these conditions. Next-generation sequencing has accelerated the discovery of new genes and facilitated the description of novel congenital myasthenic syndromes. Retrospective therapy data from these newly identified syndromes has provided additional insight on the management of these conditions. Cholinergic agents, β-adrenergic agonists, and open-channel blockers remain the principal treatment modalities, and their optimal use depends on an accurate genetic diagnosis and the timely clinical recognition of the disease. In particular, pyridostigmine, usually a first-line agent, should be avoided in DOK7, acetylcholinesterase deficiency, and slow-channel congenital myasthenic syndromes. Beta-adrenergic agonists have been recognized as a first-line agent for a number of congenital myasthenic syndromes, particularly DOK7 and acetylcholinesterase deficiency, whereas long-lived open-channel blockers of the a...Continue Reading
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