Improving T Cell Expansion with a Soft Touch.

Improving T Cell Expansion with a Soft Touch.
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DOI:
10.1021/acs.nanolett.6b04071
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发表时间:
2017-02-08
期刊:
影响因子:
10.8
通讯作者:
Kam LC
Kam LC
中科院分区:
材料科学1区
文献类型:
--
作者:
Lambert LH;Goebrecht GK;De Leo SE;O'Connor RS;Nunez-Cruz S;Li TD;Yuan J;Milone MC;Kam LC

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Protein-coated microbeads provide a consistent approach for activating and expanding populations of T cells for immunotherapy, but don’t fully capture the properties of antigen presenting cells. In this report, we enhance T cell expansion by replacing the conventional, rigid bead with a mechanically soft elastomer. Polydimethylsiloxane (PDMS) was prepared in a microbead format and modified with activating antibodies to CD3 and CD28. Three different formulations of PDMS provided an extended proliferative phase in both CD4+-only and mixed CD4+/CD8+ T cell preparations. CD8+ T cells retained cytotoxic function, as measured by a set of biomarkers (perforin production, LAMP2 mobilization, and IFN-γ secretion) and an in vivo assay of targeted cell killing. Notably, PDMS beads presented a nanoscale polymer structure and higher rigidity than associated with conventional bulk material. These data suggest T cells respond to this higher rigidity, indicating an unexpected effect of curing conditions. Together, these studies demonstrate that adopting mechanobiology ideas into the bead platform can provide new tools for T cell-based immunotherapy.
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