T cell response to two immunodominant proteolipid protein (PLP) peptides in multiple sclerosis patients and healthy controls

C. M. Pelfrey, L. R. Tranquill, A. B. Vogt, H. F. McFarland

Research output: Contribution to journalArticle

Abstract

Multiple sclerosis (MS) is a demyelinating disease of the central nervous system in which autoimmune T lymphocytes reacting with myelin antigens are believed to play a pathogenic role. Since HLA binding is involved in the selection of T cell responses, we have examined PLP peptide binding to HLA DR2, an HLA allele frequently found in MS patients. Both PLP 40-60 and PLP 89-106 show significant, high affinity binding to HLA DR2. We then tested whether responses to PLP peptides 40-60 and 89-106 are elevated in multiple sclerosis patients compared to matched controls. We also analysed T cell responses to MBP 87-106, which is considered to be the immunodominant region of MBP in humans. Here we demonstrate heterogenous T cell responses to PLP 40-60, PLP 89-106 and MBP 87-106 in both MS patients and controls. The overall number of TCL and the HLA restriction of those TCL did not vary significantly in the two groups. PLP 40-60 specific cytolytic TCL were increased in MS patients, whereas healthy controls had increased percentages of cytolytic TCL responding to PLP 89-106 and MBP 87-106. Although the data presented here shows heterogenous responses in T cell numbers, differences in numbers and specificity of cytolytic cells could be involved in the pathogenesis of autoimmune demyelinating disease.

Original languageEnglish (US)
Pages (from-to)270-278
Number of pages9
JournalMultiple Sclerosis
Volume1
Issue number5
StatePublished - 1996
Externally publishedYes

Keywords

  • Cytotoxic t lymphocytes
  • HLA DR2
  • Myelin basic protein
  • Proteolipid protein

ASJC Scopus subject areas

  • Clinical Neurology

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