The expression of co-stimulatory and accessory molecules on cultured human muscle cells is not dependent on stimulus by pro-inflammatory cytokines: Relevance for the pathogenesis of inflammatory myopathy

Research output: Contribution to journalArticle

Abstract

Specific activation of naive T cells requires TCR engagement plus interaction of CD28 on T cells with co-stimulatory B7-1/B7-2 on APCs. Since muscle cells may be directly involved in activating muscle-infiltrating T lymphocytes in polymyositis and inclusion body myositis, we analyzed B7 expression on myoblasts before and after treatment with pro-inflammatory cytokines. We found no expression of B7-1/B7-2, either constitutively or after stimulus with cytokines. Furthermore, myoblasts failed to stimulate alloreactive peripheral blood lymphocytes in mixed lymphocyte reactions. Lack of B7 expression was confirmed by immunostaining of polymyositis patients muscle: only T and the few B lymphocytes present in inflammation areas expressed B7-1.

Original languageEnglish
Pages (from-to)52-58
Number of pages7
JournalJournal of Neuroimmunology
Volume85
Issue number1
DOIs
Publication statusPublished - May 1 1998

Keywords

  • Antigen presenting cell
  • Autoimmunity
  • Co-stimulatory molecules
  • Myoblasts

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy
  • Clinical Neurology
  • Neurology

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