PMID- 22683336 OWN - NLM STAT- MEDLINE DCOM- 20121018 LR - 20220311 IS - 1872-8421 (Electronic) IS - 0165-5728 (Linking) VI - 250 IP - 1-2 DP - 2012 Sep 15 TI - Anti-MuSK- and anti-AChR-positive myasthenia gravis induced by d-penicillamine. PG - 94-8 LID - 10.1016/j.jneuroim.2012.05.011 [doi] AB - BACKGROUND: Myasthenia gravis (MG) is an autoimmune disorder of the neuromuscular junction usually caused by antibodies to the nicotinic acetylcholine receptor (AChR) and occasionally to muscle-specific kinase (MuSK). D-penicillamine is a therapeutic agent for several diseases, but can also induce a number of immune-mediated disorders, including MG, as a side-effect. In most patients with D-penicillamine-induced MG, anti-AChR antibodies are detected, but the presence of anti-MuSK antibodies has not been reported previously. CASE: The case reported was a female patient who presented with myasthenic symptoms after D-penicillamine administration for scleroderma. RESULTS: Both anti-AChR and anti-MuSK antibodies were identified in the patient's serum. The anti-MuSK antibodies were of the IgG4 subclass, as in idiopathic MG. Both types of antibody gradually disappeared after discontinuation of D-penicillamine. A significant improvement in symptoms was observed and the patient gradually became free of MG symptoms, without requiring any treatment for MG. Another four double-positive (anti-AChR and anti-MuSK antibodies) patients were identified during a retrospective study, but none had been treated with D-penicillamine. CONCLUSION: D-penicillamine can cause anti-AChR and anti-MuSK antibody-positive MG, a rare phenomenon which is reversed after discontinuation of D-penicillamine treatment. CI - Copyright (c) 2012 Elsevier B.V. All rights reserved. FAU - Poulas, Konstantinos AU - Poulas K AD - Department of Pharmacy, University of Patras, GR 26500, Patras, Greece. kpoulas@upatras.gr FAU - Koutsouraki, Euphrosyni AU - Koutsouraki E FAU - Kordas, Gregory AU - Kordas G FAU - Kokla, Anna AU - Kokla A FAU - Tzartos, Socrates J AU - Tzartos SJ LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120609 PL - Netherlands TA - J Neuroimmunol JT - Journal of neuroimmunology JID - 8109498 RN - 0 (Antirheumatic Agents) RN - 0 (Autoantibodies) RN - 0 (Autoantigens) RN - 0 (Receptors, Cholinergic) RN - EC 2.7.10.1 (MUSK protein, human) RN - EC 2.7.10.1 (Receptor Protein-Tyrosine Kinases) RN - GNN1DV99GX (Penicillamine) SB - IM MH - Aged MH - Antirheumatic Agents/*adverse effects MH - Autoantibodies/blood/immunology MH - Autoantigens/immunology MH - Female MH - Humans MH - Myasthenia Gravis/*chemically induced/immunology MH - Penicillamine/*adverse effects MH - Receptor Protein-Tyrosine Kinases/*immunology MH - Receptors, Cholinergic/*immunology MH - Scleroderma, Systemic/drug therapy/physiopathology EDAT- 2012/06/12 06:00 MHDA- 2012/10/19 06:00 CRDT- 2012/06/12 06:00 PHST- 2011/11/06 00:00 [received] PHST- 2012/03/17 00:00 [revised] PHST- 2012/05/16 00:00 [accepted] PHST- 2012/06/12 06:00 [entrez] PHST- 2012/06/12 06:00 [pubmed] PHST- 2012/10/19 06:00 [medline] AID - S0165-5728(12)00165-8 [pii] AID - 10.1016/j.jneuroim.2012.05.011 [doi] PST - ppublish SO - J Neuroimmunol. 2012 Sep 15;250(1-2):94-8. doi: 10.1016/j.jneuroim.2012.05.011. Epub 2012 Jun 9.