Article (Scientific journals)
Pathways of immediate hypothermia and leukocyte infiltration in an adjuvant-free mouse model of anaphylaxis.
Balbino, Bianca; Sibilano, Riccardo; Starkl, Philipp et al.
2016In Journal of Allergy and Clinical Immunology
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Keywords :
Fc receptors; Rodents; allergy; anaphylaxis; antibodies; inflammation; mast cells/basophils; monocytes/macrophages; mouse model; neutrophils
Abstract :
[en] BACKGROUND: Conflicting results have been obtained regarding the roles of Fc receptors and effector cells in models of active systemic anaphylaxis (ASA). In part, this might reflect the choice of adjuvant used during sensitization because various adjuvants might differentially influence the production of particular antibody isotypes. OBJECTIVE: We developed an "adjuvant-free" mouse model of ASA and assessed the contributions of components of the "classical" and "alternative" pathways in this model. METHODS: Mice were sensitized intraperitoneally with ovalbumin at weekly intervals for 6 weeks and challenged intraperitoneally with ovalbumin 2 weeks later. RESULTS: Wild-type animals had immediate hypothermia and late-phase intraperitoneal inflammation in this model. These features were reduced in mice lacking the IgE receptor FcepsilonRI, the IgG receptor FcgammaRIII or the common gamma-chain FcRgamma. FcgammaRIV blockade resulted in a partial reduction of inflammation without any effect on hypothermia. Depletion of monocytes/macrophages with clodronate liposomes significantly reduced the hypothermia response. By contrast, depletion of neutrophils or basophils had no significant effects in this ASA model. Both the hypothermia and inflammation were dependent on platelet-activating factor and histamine and were reduced in 2 types of mast cell (MC)-deficient mice. Finally, engraftment of MC-deficient mice with bone marrow-derived cultured MCs significantly exacerbated the hypothermia response and restored inflammation to levels similar to those observed in wild-type mice. CONCLUSION: Components of the classical and alternative pathways contribute to anaphylaxis in this adjuvant-free model, with key roles for MCs and monocytes/macrophages.
Disciplines :
Life sciences: Multidisciplinary, general & others
Author, co-author :
Balbino, Bianca
Sibilano, Riccardo
Starkl, Philipp
Marichal, Thomas  ;  Université de Liège > Département des sciences fonctionnelles (DSF) > GIGA-R : Biochimie et biologie moléculaire
Gaudenzio, Nicolas
Karasuyama, Hajime
Bruhns, Pierre
Tsai, Mindy
Reber, Laurent L.
Galli, Stephen J.
Language :
English
Title :
Pathways of immediate hypothermia and leukocyte infiltration in an adjuvant-free mouse model of anaphylaxis.
Publication date :
2016
Journal title :
Journal of Allergy and Clinical Immunology
ISSN :
0091-6749
eISSN :
1097-6825
Publisher :
Mosby, United States - Missouri
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c) 2016. Published by Elsevier Inc.
Available on ORBi :
since 18 January 2017

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