Mouse and human neutrophils induce anaphylaxis
Friederike Jönsson, … , Marc Daëron, Pierre Bruhns
Friederike Jönsson, … , Marc Daëron, Pierre Bruhns
Published March 23, 2011
Citation Information: J Clin Invest. 2011;121(4):1484-1496. https://doi.org/10.1172/JCI45232.
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Research Article

Mouse and human neutrophils induce anaphylaxis

Abstract

Anaphylaxis is a life-threatening hyperacute immediate hypersensitivity reaction. Classically, it depends on IgE, FcεRI, mast cells, and histamine. However, anaphylaxis can also be induced by IgG antibodies, and an IgG1-induced passive type of systemic anaphylaxis has been reported to depend on basophils. In addition, it was found that neither mast cells nor basophils were required in mouse models of active systemic anaphylaxis. Therefore, we investigated what antibodies, receptors, and cells are involved in active systemic anaphylaxis in mice. We found that IgG antibodies, FcγRIIIA and FcγRIV, platelet-activating factor, neutrophils, and, to a lesser extent, basophils were involved. Neutrophil activation could be monitored in vivo during anaphylaxis. Neutrophil depletion inhibited active, and also passive, systemic anaphylaxis. Importantly, mouse and human neutrophils each restored anaphylaxis in anaphylaxis-resistant mice, demonstrating that neutrophils are sufficient to induce anaphylaxis in mice and suggesting that neutrophils can contribute to anaphylaxis in humans. Our results therefore reveal an unexpected role for IgG, IgG receptors, and neutrophils in anaphylaxis in mice. These molecules and cells could be potential new targets for the development of anaphylaxis therapeutics if the same mechanism is responsible for anaphylaxis in humans.

Authors

Friederike Jönsson, David A. Mancardi, Yoshihiro Kita, Hajime Karasuyama, Bruno Iannascoli, Nico Van Rooijen, Takao Shimizu, Marc Daëron, Pierre Bruhns

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Figure 7

PAF mediates neutrophil-dependent active anaphylaxis.

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PAF mediates neutrophil-dependent active anaphylaxis. Indicated mice wer...
Indicated mice were immunized and challenged with BSA. Central temperatures and survival rates were monitored. (A and B) ASA in 5KO mice injected (A) with vehicle or indicated PAF-R antagonists (n = 4) or (B) with vehicle or cyproheptadine (n = 4) before BSA challenge. (C) ASA in WT mice injected with ABT-491, cyproheptadine, or vehicle before BSA challenge (n = 3). (D) ASA in cPla2–/– mice (n = 5) or heterozygous littermate controls (n = 8). (A–D) Data are represented as mean ± SEM and are representative of 2 independent experiments. X’s represent 100% mortality in the experimental group.