alexa Role of interleukin 10 in specific immunotherapy.
Immunology

Immunology

Immunotherapy: Open Access

Author(s): Akdis CA, Blesken T, Akdis M, Wthrich B, Blaser K, Akdis CA, Blesken T, Akdis M, Wthrich B, Blaser K, Akdis CA, Blesken T, Akdis M, Wthrich B, Blaser K, Akdis CA, Blesken T, Akdis M, Wthrich B, Blaser K

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Abstract The induction of allergen-specific anergy in peripheral T cells represents a key step in specific immunotherapy (SIT). Here we demonstrate that the anergic state results from increased IL-10 production. In bee venom (BV)-SIT the specific proliferative and cytokine responses against the main allergen, the phospholipase A2 (PLA), and T cell epitope-containing PLA peptides were significantly suppressed after 7 d of treatment. Simultaneously, the production of IL-10 increased during BV-SIT. After 28 d of BV-SIT the anergic state was established. Intracytoplasmic cytokine staining of PBMC combined with surface marker detection revealed that IL-10 was produced initially by activated CD4(+)CD25(+), allergen-specific T cells, and followed by B cells and monocytes. Neutralization of IL-10 in PBMC fully reconstituted the specific proliferative and cytokine responses. A similar state of IL-10-associated T cell anergy, as induced in BV-SIT, was found in hyperimmune individuals who recently had received multiple bee stings. The addition of IL-10 to soluble CD40 ligand IL-4-stimulated PBMC or purified B cells inhibited the PLA-specific and total IgE and enhanced the IgG4 formation. Accordingly, increased IL-10 production by SIT causes specific anergy in peripheral T cells, and regulates specific IgE and IgG4 production toward normal IgG4-related immunity.
This article was published in J Clin Invest and referenced in Immunotherapy: Open Access

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