Immunodominant regions for T helper-cell sensitization on the human nicotinic receptor α subunit in myasthenia gravis

Maria Pia Protti, Angeld A. Manfredi, Christie Straub, James F. Howard, Bianca M. Conti-Tronconi

Research output: Contribution to journalArticlepeer-review

Abstract

In myasthenia gravis an autoimmune response against the nicotinic acetylcholine receptor (AChR) occurs. The α subunit of the AChR contains both the epitope(s) that dominates the antibody response (main immunogenic region) and epitopes involved in T helper cell sensitization. In this study, overlapping synthetic peptides corresponding to the complete AChR α-subunit sequence were used to propagate polyclonal AChR-specific T helper cell lines from four myasthenic patients of different HLA types. Response of the T helper lines to the individual peptides was studied. Four immunodominant sequence segments were identified - i.e., residues 48-67, 101-120, 304-322, and 419-437. These regions did not include residues known to form the main immunogenic region or the cholinergic binding site, and they frequently contained sequence motifs that have been proposed to be related to T-epitope formation.

Original languageEnglish
Pages (from-to)7792-7796
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume87
Issue number19
Publication statusPublished - 1990

Keywords

  • Autoimmunity
  • Synthetic peptides
  • T-helper epitope

ASJC Scopus subject areas

  • Genetics
  • General

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