Abstract：
:The specific recognition of the acetylcholine receptor and its alpha-subunit by T cells derived from patients with myasthenia gravis or mice with experimental autoimmune myasthenia gravis raises the question of the role of autoreactive T cells in the myasthenic process. Sequences of the acetylcholine receptor alpha-subunit previously shown to be immunogenic in myasthenic patients were tested for their immunogenicity in various inbred mouse strains. High, intermediate and low T-cell proliferative responses could be observed to peptides representing sequences 195-212 and 259-271 of the human acetylcholine receptor alpha-subunit. Following immunization with the Torpedo acetylcholine receptor, lymphocytes of SJL mice proliferated efficiently to p 195-212 but not to p259-271. On the other hand, lymph node cells of BALB/c mice responded well to p259-271 but not to p195-212. Thus, the influence of the genetic make-up of the examined mice on the immune response to the two peptides could be clearly demonstrated by the existence of strain-dependent immunodominant and cryptic regions on the autoantigen. The differences between the strains were less pronounced when antibody responses were measured to these two T-cell epitopes, although a partial correlation with the proliferative responses could be observed. It can be concluded that epitopes specifically recognized by T lymphocytes of patients with myasthenia gravis also represent specific T-cell epitopes in the autoreactivity to the acetylcholine receptor in mice and that immune responsiveness to these peptides is influenced by the genetic make-up of the responding mouse strains.
journal_name
Immunologyjournal_title
Immunologyauthors
Brocke S,Dayan M,Rothbard J,Fuchs S,Mozes Esubject
Has Abstractpub_date
1990-04-01 00:00:00pages
495-500issue
4eissn
0019-2805issn
1365-2567journal_volume
69pub_type
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