Nanoparticles Engineered as Artificial Antigen-Presenting Cells Induce Human CD4(+) and CD8(+) Tregs That Are Functional in Humanized Mice.

Nanoparticles Engineered as Artificial Antigen-Presenting Cells Induce Human CD4(+) and CD8(+) Tregs That Are Functional in Humanized Mice.
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DOI:
10.3389/fimmu.2021.628059
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发表时间:
2021
影响因子:
7.3
通讯作者:
La Cava A
La Cava A
中科院分区:
医学2区
文献类型:
--
作者:
Giang S;Horwitz DA;Bickerton S;La Cava A

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Artificial antigen-presenting cells (aAPCs) are synthetic versions of naturally occurring antigen-presenting cells (APCs) that, similar to natural APCs, promote efficient T effector cell responses in vitro. This report describes a method to produce acellular tolerogenic aAPCs made of biodegradable poly lactic-co-glycolic acid (PLGA) nanoparticles (NPs) and encapsulating IL-2 and TGF-β for a paracrine release to T cells. We document that these aAPCs can induce both human CD4+ and CD8+ T cells to become FoxP3+ T regulatory cells (Tregs). The aAPC NP-expanded human Tregs are functional in vitro and can modulate systemic autoimmunity in vivo in humanized NSG mice. These findings establish a proof-of-concept to use PLGA NPs as aAPCs for the induction of human Tregs in vitro and in vivo, highlighting the immunotherapeutic potential of this targeted approach to repair IL-2 and/or TGF-β defects documented in certain autoimmune diseases such as systemic lupus erythematosus.
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