Induction of peripheral T cell tolerance by antigen-presenting B cells. I. Relevance of antigen presentation persistence

Giorgio Raimondi, Ivan Zanoni, Stefania Citterio, Paola Ricciardi-Castagnoli, Francesca Granucci

Research output: Contribution to journalArticlepeer-review

Abstract

Various mechanisms of peripheral T cell tolerization have evolved to avoid responses mediated by autoreactive T cells that have not been eliminated in the thymus. In this study, we investigated the peripheral conditions of Ag presentation required to induce T cell tolerance when the predominant APCs are B cells. We show that transient Ag presentation, in absence of inflammation and in a self-context, induces CD4+ T cell activation and memory formation. In contrast, chronic Ag presentation leads to CD4+ T cell tolerance. The importance of long-lasting Ag presentation in inducing tolerance was also confirmed in the herpes stromal keratitis autoimmune disease model. Keratogenic T cells could be activated or tolerized depending on the APC short or long persistence. Thus, when APCs are B cells, the persistence of the Ag presentation itself is one of the main conditions to have peripheral T cell tolerance.

Original languageEnglish
Pages (from-to)4012-4020
Number of pages9
JournalJournal of Immunology
Volume176
Issue number7
Publication statusPublished - Apr 1 2006

ASJC Scopus subject areas

  • Immunology

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