Follicular regulatory T cells can be specific for the immunizing antigen and derive from naive T cells

Meryem Aloulou, Edward J. Carr, Mylène Gador, Alexandre Bignon, Roland S. Liblau, Nicolas Fazilleau () and Michelle A. Linterman ()
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Meryem Aloulou: Centre de Physiopathologie de Toulouse Purpan, Institut National de la Santé et de la Recherche Médicale
Edward J. Carr: Laboratory of Lymphocyte Signalling and Development, The Babraham Institute
Mylène Gador: Centre de Physiopathologie de Toulouse Purpan, Institut National de la Santé et de la Recherche Médicale
Alexandre Bignon: Laboratory of Lymphocyte Signalling and Development, The Babraham Institute
Roland S. Liblau: Centre de Physiopathologie de Toulouse Purpan, Institut National de la Santé et de la Recherche Médicale
Nicolas Fazilleau: Centre de Physiopathologie de Toulouse Purpan, Institut National de la Santé et de la Recherche Médicale
Michelle A. Linterman: Laboratory of Lymphocyte Signalling and Development, The Babraham Institute

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract T follicular regulatory (Tfr) cells are a subset of Foxp3+ regulatory T (Treg) cells that form in response to immunization or infection, which localize to the germinal centre where they control the magnitude of the response. Despite an increased interest in the role of Tfr cells in humoral immunity, many fundamental aspects of their biology remain unknown, including whether they recognize self- or foreign antigen. Here we show that Tfr cells can be specific for the immunizing antigen, irrespective of whether it is a self- or foreign antigen. We show that, in addition to developing from thymic derived Treg cells, Tfr cells can also arise from Foxp3− precursors in a PD-L1-dependent manner, if the adjuvant used is one that supports T-cell plasticity. These findings have important implications for Tfr cell biology and for improving vaccine efficacy by formulating vaccines that modify the Tfr:Tfh cell ratio.

Date: 2016
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DOI: 10.1038/ncomms10579

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