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Type I interferons provide additive signals for murine regulatory B cell induction by Schistosoma mansoni eggs.


ABSTRACT: The helminth Schistosoma mansoni (S. mansoni) induces a network of regulatory immune cells, including interleukin (IL)-10-producing regulatory B cells (Bregs). However, the signals required for the development and activation of Bregs are not well characterized. Recent reports suggest that helminths induce type I interferons (IFN-I), and that IFN-I drive the development of Bregs in humans. We therefore assessed the role of IFN-I in the induction of Bregs by S. mansoni. Mice chronically infected with S. mansoni or i.v. injected with S. mansoni soluble egg antigen (SEA) developed a systemic IFN-I signature. Recombinant IFN-? enhanced IL-10 production by Bregs stimulated with S. mansoni SEA in vitro, while not activating Bregs by itself. IFN-I signaling also supported ex vivo IL-10 production by SEA-primed Bregs but was dispensable for activation of S. mansoni egg-induced Bregs in vivo. These data indicate that although IFN-I can serve as a coactivator for Breg IL-10 production, they are unlikely to participate in the development of Bregs in response to S. mansoni eggs.

SUBMITTER: Obieglo K 

PROVIDER: S-EPMC6771625 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature

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Type I interferons provide additive signals for murine regulatory B cell induction by Schistosoma mansoni eggs.

Obieglo Katja K   Costain Alice A   Webb Lauren M LM   Ozir-Fazalalikhan Arifa A   Brown Shelia L SL   MacDonald Andrew S AS   Smits Hermelijn H HH  

European journal of immunology 20190529 8


The helminth Schistosoma mansoni (S. mansoni) induces a network of regulatory immune cells, including interleukin (IL)-10-producing regulatory B cells (Bregs). However, the signals required for the development and activation of Bregs are not well characterized. Recent reports suggest that helminths induce type I interferons (IFN-I), and that IFN-I drive the development of Bregs in humans. We therefore assessed the role of IFN-I in the induction of Bregs by S. mansoni. Mice chronically infected w  ...[more]

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