Scaffolds that mimic antigen-presenting cells enable ex vivo expansion of primary T cells.

Scaffolds that mimic antigen-presenting cells enable ex vivo expansion of primary T cells.
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DOI:
10.1038/nbt.4047
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发表时间:
2018-03
影响因子:
46.9
通讯作者:
Mooney DJ
Mooney DJ
中科院分区:
工程技术1区
文献类型:
--
作者:
Cheung AS;Zhang DKY;Koshy ST;Mooney DJ

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Therapeutic ex vivo T cell expansion is limited by low rates, and T-cell products of limited functionality. Here we describe a system that mimics natural antigen-presenting cells (APCs) and consists of a fluid lipid bilayer supported by mesoporous silica micro-rods. The lipid bilayer presents membrane-bound cues for T-cell receptor stimulation and costimulation, while the micro-rods enable sustained release of soluble paracrine cues. Using anti-CD3, anti-CD28 and interleukin-2, we show that the APC-mimetic scaffolds (APC-ms) promote two- to ten-fold greater polyclonal expansion of primary mouse and human T cells compared with commercial expansion beads (Dynabeads). The efficiency of expansion depends on the density of stimulatory cues and amount of material in the starting culture. Following a single stimulation, APC-ms enables antigen-specific expansion of rare cytotoxic T-cell subpopulations at a much greater magnitude than autologous monocyte-derived dendritic cells after two weeks. APC-ms support over 5-fold greater expansion of restimulated CD19 CAR-T cells than Dynabeads, with similar efficacy in a xenograft lymphoma model.
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