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Abstract:
Most of the immunoglobulin A (IgA) in the gut is generated byB cells in the germinal centers of Peyer's patches through aprocess that requires the presence of CD4+ follicular B helperT(TFH) cells. The nature of these TFH cells in Peyer's patcheshas been elusive. Here, we demonstrate that suppressive Foxp3+CD4+T cells can differentiate into TFH cells in mouse Peyer's patches.The conversion of Foxp3+ T cells into TFH cells requires theloss of Foxp3 expression and subsequent interaction with B cells.Thus, environmental cues present in gut Peyer's patches promotethe selective differentiation of distinct helper T cell subsets,such as TFH cells.
1 Laboratory for Mucosal Immunity, RIKEN, Yokohama 1-7-22, Tsurumi, Yokohama, 230-0045, Japan. 2 Research Unit for Immune Homeostasis, RIKEN, Yokohama 1-7-22, Tsurumi, Yokohama, 230-0045, Japan. 3 Laboratory for Autoimmune Regulation, Research Center for Allergy and Immunology, RIKEN, Yokohama 1-7-22, Tsurumi, Yokohama, 230-0045, Japan. 4 Department of Immunology and Genomic Medicine, Kyoto University, Graduate School of Medicine, Sakyo-ku, Kyoto 606-8501, Japan.
* These authors contributed equally to this work.
To whom correspondence should be addressed. E-mail: shohei{at}rcai.riken.jp (S.H.); sidonia-f{at}rcai.riken.jp (S.F.)
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