Abstract:
:Group 3 innate lymphoid cells (ILC3s) have emerged as important cellular players in tissue repair and innate immunity. Whether these cells meaningfully regulate adaptive immune responses upon activation has yet to be explored. Here we show that upon IL-1β stimulation, peripheral ILC3s become activated, secrete cytokines, up-regulate surface MHC class II molecules, and express costimulatory molecules. ILC3s can take up latex beads, process protein antigen, and consequently prime CD4(+) T-cell responses in vitro. The cognate interaction of ILC3s and CD4(+) T cells leads to T-cell proliferation both in vitro and in vivo, whereas its disruption impairs specific T-cell and T-dependent B-cell responses in vivo. In addition, the ILC3-CD4(+) T-cell interaction is bidirectional and leads to the activation of ILC3s. Taken together, our data reveal a novel activation-dependent function of peripheral ILC3s in eliciting cognate CD4(+) T-cell immune responses.
journal_name
Proc Natl Acad Sci U S Aauthors
von Burg N,Chappaz S,Baerenwaldt A,Horvath E,Bose Dasgupta S,Ashok D,Pieters J,Tacchini-Cottier F,Rolink A,Acha-Orbea H,Finke Ddoi
10.1073/pnas.1406908111subject
Has Abstractpub_date
2014-09-02 00:00:00pages
12835-40issue
35eissn
0027-8424issn
1091-6490pii
1406908111journal_volume
111pub_type
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