The immune system has tailored its effector functions to optimally respond to distinct species of microbes. Based on emerging knowledge on the different effector T-cell and innate lymphoid cell (ILC) lineages, it is clear that the innate and adaptive immune systems converge into 3 major kinds of cell-mediated effector immunity, which we propose to categorize as type 1, type 2, and type 3. Type 1 immunity consists of T-bet+ IFN-γ-producing group 1 ILCs (ILC1 and natural killer cells), CD8+ cytotoxic T cells (TC1), and CD4+ TH1 cells, which protect against intracellular microbes through activation of mononuclear phagocytes. Type 2 immunity consists of GATA-3+ ILC2s, TC2 cells, and TH2 cells producing IL-4, IL-5, and IL-13, which induce mast cell, basophil, and eosinophil activation, as well as IgE antibody production, thus protecting against helminthes and venoms. Type 3 immunity is mediated by retinoic acid-related orphan receptor γt+ ILC3s, TC17 cells, and TH17 cells producing IL-17, IL-22, or both, which activate mononuclear phagocytes but also recruit neutrophils and induce epithelial antimicrobial responses, thus protecting against extracellular bacteria and fungi. On the other hand, type 1 and 3 immunity mediate autoimmune diseases, whereas type 2 responses can cause allergic diseases

The 3 major types of innate and adaptive cell-mediated effector immunity / Annunziato F; Romagnani C; Romagnani S. - In: JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. - ISSN 0091-6749. - STAMPA. - 135:(2015), pp. 626-635. [doi: 10.1016/j.jaci.2014.11.001]

The 3 major types of innate and adaptive cell-mediated effector immunity.

ANNUNZIATO, FRANCESCO;ROMAGNANI, SERGIO
2015

Abstract

The immune system has tailored its effector functions to optimally respond to distinct species of microbes. Based on emerging knowledge on the different effector T-cell and innate lymphoid cell (ILC) lineages, it is clear that the innate and adaptive immune systems converge into 3 major kinds of cell-mediated effector immunity, which we propose to categorize as type 1, type 2, and type 3. Type 1 immunity consists of T-bet+ IFN-γ-producing group 1 ILCs (ILC1 and natural killer cells), CD8+ cytotoxic T cells (TC1), and CD4+ TH1 cells, which protect against intracellular microbes through activation of mononuclear phagocytes. Type 2 immunity consists of GATA-3+ ILC2s, TC2 cells, and TH2 cells producing IL-4, IL-5, and IL-13, which induce mast cell, basophil, and eosinophil activation, as well as IgE antibody production, thus protecting against helminthes and venoms. Type 3 immunity is mediated by retinoic acid-related orphan receptor γt+ ILC3s, TC17 cells, and TH17 cells producing IL-17, IL-22, or both, which activate mononuclear phagocytes but also recruit neutrophils and induce epithelial antimicrobial responses, thus protecting against extracellular bacteria and fungi. On the other hand, type 1 and 3 immunity mediate autoimmune diseases, whereas type 2 responses can cause allergic diseases
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Annunziato F; Romagnani C; Romagnani S
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2158/993620
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