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- W1981034102 abstract "Studies with mouse models demonstrate 2 pathways of systemic anaphylaxis: a classic pathway mediated by IgE, FcepsilonRI, mast cells, histamine, and platelet-activating factor (PAF) and an alternative pathway mediated by IgG, FcgammaRIII, macrophages, and PAF. The former pathway requires much less antigen and antibody than the latter. This is modified, however, by IgG antibodies that prevent IgE-mediated anaphylaxis by intercepting antigen before it binds to mast cell-associated IgE. Consequently, IgG antibodies block systemic anaphylaxis induced by small quantities of antigen but mediate systemic anaphylaxis induced by larger quantities. The importance of the alternative pathway in human subjects is unknown, but human IgG, IgG receptors, macrophages, mediators, and mediator receptors have appropriate properties to support this pathway if sufficient IgG and antigen are present. The severity of systemic anaphylaxis is increased by nitric oxide produced by the enzyme endothelial nitric oxide synthase and by the cytokines IL-4 and IL-13 and decreased by endogenous beta-adrenergic stimulation and receptors that contain ITIM that bind tyrosine phosphatases. Anaphylaxis is also suppressed by other receptors and ion channels that function through distinct mechanisms. Unlike systemic anaphylaxis, intestinal anaphylaxis (allergic diarrhea) is almost totally IgE and mast cell dependent and is mediated predominantly by PAF and serotonin. Some potent food allergens, including peanuts and tree nuts, can directly enhance anaphylaxis by stimulating an anaphylactoid response through the innate immune system. Results of these studies suggest novel prophylactic agents, including nonstimulatory anti-IgE mAbs, IL-4 receptor antagonists, PAF antagonists, and agents that cross-link FcepsilonRI or FcgammaRIII to an ITIM-containing inhibitory receptor." @default.
- W1981034102 created "2016-06-24" @default.
- W1981034102 creator A5036569483 @default.
- W1981034102 date "2007-09-01" @default.
- W1981034102 modified "2023-10-05" @default.
- W1981034102 title "Anaphylaxis: Lessons from mouse models" @default.
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- W1981034102 doi "https://doi.org/10.1016/j.jaci.2007.07.033" @default.
- W1981034102 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17765751" @default.
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