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  • Title: Degradation of acetylcholine receptor in diaphragms of rats with experimental autoimmune myasthenia gravis.
    Author: Merlie JP, Heinemann S, Einarson B, Lindstrom JM.
    Journal: J Biol Chem; 1979 Jul 25; 254(14):6328-32. PubMed ID: 447717.
    Abstract:
    The degradation of acetylcholine receptor observed in denervated and innervated normal rat diaphragms in organ culture is stimulated by exogenous antireceptor serum. In this paper we demonstrate that diaphragms from rats with experimental autoimmune myasthenia gravis contain reduced amounts of acetylcholine receptor. Acetylcholine receptor from myasthenic, but not from normal, rats has antibody bound to it and is degraded at an accelerated rate. We conclude that in the chronic phase of experimental autoimmune myasthenia gravis increased acetylcholine receptor degradation can be accounted for by a mechanism involving antigenic modulation, and that such a process can contribute to the clinical symptoms of impaired neuromuscular transmission.
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