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Ocular myasthenia gravis induced by human acetylcholine receptor ϵ subunit immunization in HLA DR3 transgenic mice.
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- Additional Information
- Source:
Publisher: Elsevier/North-Holland Biomedical Press Country of Publication: Netherlands NLM ID: 7910006 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-0542 (Electronic) Linking ISSN: 01652478 NLM ISO Abbreviation: Immunol Lett Subsets: MEDLINE
- Publication Information:
Original Publication: Amsterdam, Elsevier/North-Holland Biomedical Press.
- Subject Terms:
- Abstract:
Extraocular muscles (EOM) are preferentially involved in myasthenia gravis (MG) and acetylcholine receptor (AChR) antibody positive MG patients may occasionally present with isolated ocular symptoms. Although experimental autoimmune myasthenia gravis (EAMG) induced by whole AChR immunization closely mimics clinical and immunopathological aspects of MG, EOM are usually not affected. We have previously developed an EAMG model, which imitates EOM symptoms of MG by immunization of human leukocyte antigen (HLA) transgenic mice with α or γ-subunits of human AChR (H-AChR). To investigate the significance of the ϵ-subunit in ocular MG, we immunized HLA-DR3 and HLA-DQ8 transgenic mice with recombinant H-AChR ϵ-subunit expressed in Escherichia coli. HLA-DR3 transgenic mice showed significantly higher clinical ocular and generalized MG severity scores and lower grip strength values than HLA-DQ8 mice. H-AChR ϵ-subunit-immunized HLA-DR3 transgenic mice had higher serum anti-AChR antibody (IgG, IgG1, IgG2b, IgG2c and IgM) levels, neuromuscular junction IgG and complement deposit percentages than ϵ-subunit-immunized HLA-DQ8 transgenic mice. Control mice immunized with E. coli extract or complete Freund adjuvant (CFA) did not show clinical and immunopathological features of ocular and generalized EAMG. Lymph node cells of ϵ-subunit-immunized HLA-DR3 mice showed significantly higher proliferative responses than those of ϵ-subunit-immunized HLA-DQ8 mice, crude E. coli extract-immunized and CFA-immunized transgenic mice. Our results indicate that the human AChR ϵ-subunit is capable of inducing myasthenic muscle weakness. Diversity of the autoimmune responses displayed by mice expressing different HLA class II molecules suggests that the interplay between HLA class II alleles and AChR subunits might have a profound impact on the clinical course of MG.
(Copyright © 2015 European Federation of Immunological Societies. Published by Elsevier B.V. All rights reserved.)
- Contributed Indexing:
Keywords: Acetylcholine receptor; Autoimmunity; Epsilon subunit; Myasthenia gravis; Ocular myasthenia
- Accession Number:
0 (HLA-DQ Antigens)
0 (HLA-DQ8 antigen)
0 (HLA-DR3 Antigen)
0 (Immunoglobulin G)
0 (Immunoglobulin M)
0 (Protein Subunits)
0 (Receptors, Cholinergic)
9007-81-2 (Freund's Adjuvant)
- Publication Date:
Date Created: 20151024 Date Completed: 20160927 Latest Revision: 20151221
- Publication Date:
20240829
- Accession Number:
10.1016/j.imlet.2015.10.009
- Accession Number:
26493475
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