Induction of Anti-agrin Antibodies Causes Myasthenia Gravis in Mice.
Induction of Anti-agrin Antibodies Causes Myasthenia Gravis in Mice.
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抗聚集蛋白抗体的诱导导致小鼠重症肌无力
DOI:
10.1016/j.neuroscience.2018.01.015
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发表时间:
2018-03-01
期刊:
影响因子:
3.3
通讯作者:
Mei L
中科院分区:
文献类型:
--
作者:
Yan M;Liu Z;Fei E;Chen W;Lai X;Luo B;Chen P;Jing H;Pan JX;Rivner MH;Xiong WC;Mei L
Myasthenia gravis (MG) is an autoimmune disorder of the neuromuscular junction (NMJ). Most cases of MG are caused by autoantibodies against the acetylcholine receptor (AChR), muscle-specific kinase (MuSK) and low-density lipoprotein receptor-related protein 4 (LRP4). Recent studies have identified anti-agrin antibodies in MG patients lacking these three antibodies (i.e., triple negative MG). Agrin is a basal lamina protein that has two isoforms. Neural agrin (N-agrin) binds to LRP4 to activate MuSK to induce AChR clusters and is thus critical for NMJ formation. We demonstrate that mice immunized with N-agrin showed MG-associated symptoms including muscle weakness, fragmented and distorted NMJs. These effects were not observed in mice injected with muscle agrin (M-agrin), an isoform that is inactive in inducing AChR clusters. Treatment with anti-N-agrin, but not anti-M-agrin, antibodies reduced agrin-induced AChR clusters in muscle cells. Together, these observations suggest that agrin antibodies may be play a role in MG pathogenesis.
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影响因子:
5.3
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通讯作者:
Mei, Lin
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64.5
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