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- W4313404872 abstract "Abstract There are many autoimmune diseases where pathologic self T cells are the underlying cause of disease symptoms and progression. T cells are found at the site of tissue destruction, resulting not only in the exacerbation of disease, but also the release of self-epitopes in the context of inflammation resulting in the activation of additional T cell populations perpetuating disease. Published data have shown treatment with antigen-containing biodegradablepoly(lactide-co-glycolide) (PLGA) nanoparticles, i.e. tolerogenic immune-modifying particles (TIMP), is both safe and induces antigen-specific tolerance in mouse models of autoimmunity and allergy, as well as in a celiac disease Phase I/IIa clinical trial. This study further investigated the role and mechanism of TIMP-induced tolerance. The present data show that TIMP treatment modulated T cells specific for spread epitopes associated with disease progression, but not encapsulated within the TIMP, i.e. tissue-specific bystander suppression. The PLP139–151 TCR transgenic model systems was utilized to determine the cellular and molecular mechanisms driving antigen specific tolerance mediated by tolerogenic nanoparticle treatment. These data show antigen-specific TIMP treatment induced both FoxP3+ iTregs and IL-10+ Tr1 regulatory phenotypes within the antigen-specific T cell populations in both naïve mice and mice pre-primed with antigen/CFA. Additionally, both functional Tregs and IL-10 are required for TIMP-induced tolerance. Treatment thus activates various antigen-specific Treg subsets capable of regulating responses to disease-relevant autoepitopes not encapsulated within the TIMP via release of immunoregulatory cytokines within the inflammatory site. Supported by funding provided by Cour Pharmaceuticals Development, Inc." @default.
- W4313404872 created "2023-01-06" @default.
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- W4313404872 date "2022-05-01" @default.
- W4313404872 modified "2023-09-25" @default.
- W4313404872 title "Antigen-specific nanoparticle tolerance treatment actively induces both FoxP3- and IL-10-dependent regulatory mechanisms" @default.
- W4313404872 doi "https://doi.org/10.4049/jimmunol.208.supp.60.08" @default.
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