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Group 2 innate lymphoid cells license dendritic cells to potentiate memory TH2 cell responses.


ABSTRACT: Rapid activation of memory CD4(+) T helper 2 (TH2) cells during allergic inflammation requires their recruitment into the affected tissue. Here we demonstrate that group 2 innate lymphoid (ILC2) cells have a crucial role in memory TH2 cell responses, with targeted depletion of ILC2 cells profoundly impairing TH2 cell localization to the lungs and skin of sensitized mice after allergen re-challenge. ILC2-derived interleukin 13 (IL-13) is critical for eliciting production of the TH2 cell-attracting chemokine CCL17 by IRF4(+)CD11b(+)CD103(-) dendritic cells (DCs). Consequently, the sentinel function of DCs is contingent on ILC2 cells for the generation of an efficient memory TH2 cell response. These results elucidate a key innate mechanism in the regulation of the immune memory response to allergens.

SUBMITTER: Halim TY 

PROVIDER: S-EPMC4685755 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature

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Group 2 innate lymphoid cells license dendritic cells to potentiate memory TH2 cell responses.

Halim Timotheus Y F TY   Hwang You Yi YY   Scanlon Seth T ST   Zaghouani Habib H   Garbi Natalio N   Fallon Padraic G PG   McKenzie Andrew N J AN  

Nature immunology 20151102 1


Rapid activation of memory CD4(+) T helper 2 (TH2) cells during allergic inflammation requires their recruitment into the affected tissue. Here we demonstrate that group 2 innate lymphoid (ILC2) cells have a crucial role in memory TH2 cell responses, with targeted depletion of ILC2 cells profoundly impairing TH2 cell localization to the lungs and skin of sensitized mice after allergen re-challenge. ILC2-derived interleukin 13 (IL-13) is critical for eliciting production of the TH2 cell-attractin  ...[more]

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