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- W2125658456 abstract "The host deploys a subset of immune responses to expel helminths, which differs depending on the nature of the helminth. Strongyloides venezuelensis, a counterpart of the human pathogen S. stercoralis, naturally infects rodents and has been used as an experimental model. Here we show that induction of immunoglobulin G (IgG) and IgE is a prerequisite for rapid expulsion of S. venezuelensis during a primary infection. Activation-induced cytidine deaminase-deficient (AID(-/-)) mice, which lack the ability to switch IgM to other isotypes, normally developed T-helper 2 (Th2) cells and intestinal mastocytosis after infection with S. venezuelensis. Although AID(-/-) mice expelled Nippostrongylus brasiliensis normally, they required a much longer period to expel S. venezuelensis than wild-type (WT) mice. Adoptive transfers of immune sera from S. venezuelensis-infected but not N. brasiliensis-infected mice restored the ability of AID(-/-) mice to promptly expel S. venezuelensis. Immune serum-derived IgG and IgE induced worm expulsion via Fc γ receptor III (FcγRIII) and Fc ε receptor I (FcεRI), respectively, and a mixture of IgG and IgE showed collaborative effects. Whereas FcγRIII(-/-) mice or FcεRIα(-/-) mice normally could expel S. venezuelensis, FcγRIII(-/-) mice, when their IgE was neutralized by anti-IgE, or FcεRIα(-/-) mice, when their IgG binding to FcγRIII was blocked by anti-FcγRIII, showed a markedly reduced ability to expel S. venezuelensis. These data reveal that IgG and IgE play redundant roles but act in concert to accelerate S. venezuelensis expulsion. Mast cell-deficient mice, even those equipped with immune serum-derived IgG or IgE, failed to expel S. venezuelensis promptly, suggesting that mast cells are cellular targets of IgG and IgE." @default.
- W2125658456 created "2016-06-24" @default.
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- W2125658456 date "2013-07-01" @default.
- W2125658456 modified "2023-10-11" @default.
- W2125658456 title "IgG and IgE Collaboratively Accelerate Expulsion of Strongyloides venezuelensis in a Primary Infection" @default.
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- W2125658456 doi "https://doi.org/10.1128/iai.00285-13" @default.
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