Abstract

Mechanisms of allergen-specific immunotherapy.

Highlights

  • The immune system is a complex interactive network with the capacity of protecting the host from a number of pathogens while keeping a state of tolerance to self and innocuous non-self antigens

  • The induction of peripheral T cell tolerance and promotion of the formation of regulatory T-cells are key mechanisms in allergen-SIT. Both FOXP3+CD4+CD25+ regulatory T (Treg) cells and inducible IL-10- and TGF-b-producing type 1 Treg (Tr1) cells may prevent the development of allergic diseases and play a role in successful allergen-SIT and healthy immune response via several mechanisms

  • Knowledge of these molecular basis is crucial in the understanding the regulation of immune responses and their possible therapeutic targets in allergic diseases

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Summary

Background

The immune system is a complex interactive network with the capacity of protecting the host from a number of pathogens while keeping a state of tolerance to self and innocuous non-self antigens. During the development of allergic diseases, effector Th2 cells produce traditional Th2 cytokines such as IL-4, IL-5, IL-9 and IL-13 [11,12], and novel cytokines with proinflammatory functions, such as IL25, IL-31 and IL-33 [13,14,15,16,17,18,19] These cytokines induce allergen-specific IgE, eosinophilia, mucus production and the recruitment of inflammatory cells to inflamed tissues. Mechanisms of allergen-specific immunotherapy T cell regulation Since allergic diseases are Th2 driven, but much rather form complex immune disorders, the aim of allergen SIT is to induce the peripheral T cell tolerance, modulate the thresholds for mast cell and basophil activation and decrease IgE-mediated histamine release [29] (Figure 1 and 2). This type of time regime is being investigated in SLIT [107]

Conclusions
12. Akdis M
38. Chatila TA
67. Fujimoto M

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