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《Acta Academiae Medicinae Militaris Tertiae》 2006-13
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Establishing animal model of passive transferred myasthenia gravis in C57BL/6 mice aged 4 to 5 weeks by acetylcholine receptor monoclonal antibody

HUANG Zhi,XU Xiu-juan(Department of Neurology,Children's Hospital,Chongqing University of Medical Sciences,Chongqing 400014,China)  
Objective To establish an animal model of passive transferred myasthenia gravis(PTMG) in C57BL/6 mice aged 4 to 5 weeks with nicotinic acetylcholine receptor monoclonal antibody-mAb35 so as to decide the effective dose of mAb35 required to induce PTMG and to supply animal model for further study of the pathogenesis and immunotherapy of human MG.Methods The C57BL/6 mice aged 4 to 5 weeks in the experimental group were divided into three subgroups(E1,E2,E3),injected intraperitoneally(i.p.) with 0.2 ml of Ringer's buffer solution containing 0.5,1.0 or 1.5 mg/kg capital monoclonal antibody mAb35 of acetylcholine receptor respectively.The control group(N) were injected i.p.with 0.2 ml of Ringer's buffer solution without mAb35.To decide whether the model was successful,the clinical symptoms,ultrastructural changes of the mice as well as pharmacological and electrophysiological evaluation were observed and the serum levels of acetylcholine receptor antibody(AChRAb) were detected.Results All mice in the experimental groups were induced of clinic symptoms of myasthenia.The features in pharmacology,electrophysiology,ultrastructure and increased level of acetylcholine receptor antibody were in accordance with those of MG patients.Conclusion The model of PTMG can be successfully induced in C57BL/6 mice with mAb35 at effective dose of 1.0 mg/kg.The method is convenient and reliable.A fine animal model is established for experimental study of myasthenia gravis in children.
【CateGory Index】: R-332
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