Affordable Access

Induction of anergy by antibody blockade of TCR in myelin oligodendrocyte glycoprotein-specific cells.

Authors
  • Wasserman, Heather A
  • Evavold, Brian D
Type
Published Article
Journal
Journal of immunology (Baltimore, Md. : 1950)
Publication Date
Jun 01, 2008
Volume
180
Issue
11
Pages
7259–7264
Identifiers
PMID: 18490725
Source
Medline
License
Unknown

Abstract

Previous studies have found that a 95% reduction in TCR expression does not adversely affect response to foreign Ags, indicating that T cells have an excess of TCR for Ag recognition. Because self-reactive T cells may have low affinity for peptide:MHC, we investigated whether myelin-reactive T cells require these excess TCR for optimal response. To test this concept, mAb were used to effectively reduce the TCR of Valpha3.2 and Vbeta11 TCR transgenic mice (referred to as 2D2). After masking the TCR with either continuous or prepulsed anti-Valpha3.2 Ab, 2D2 cells were immediately stimulated with myelin oligodendrocyte glycoprotein (MOG)(35-55). These cells have a dramatic Ab dose-dependent reduction in proliferation, with a small reduction in TCR expression leading to a 50% reduction in proliferation in vitro. Additionally, 2D2 cells, treated with anti-Valpha3.2 Ab and peptide for 7 days, were re-stimulated with MOG and continue to have a dose-dependent reduction in proliferation. TCR quantitation identified the same amount of TCR on the Ab/peptide treatment compared with the peptide-only control. These results point out that the combination of reduced TCR and peptide challenge leads to a phenotypic change resulting in T cell anergy. Importantly, adoptive transfer of these anergic T cells upon autoimmune disease induction had a marked reduction in disease severity compared with untreated MOG-specific CD4(+) T cells, which had significant autoimmune disease manifested by optic neuritis and death. Thus, reduction of TCR expression may provide a potential therapy for self-reactive T cells involved in autoimmune diseases through the induction of anergy.

Report this publication

Statistics

Seen <100 times