Full control of ligand positioning reveals spatial thresholds for T cell receptor triggering.
Full control of ligand positioning reveals spatial thresholds for T cell receptor triggering.
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DOI:
10.1038/s41565-018-0113-3
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发表时间:
2018-07
影响因子:
38.3
通讯作者:
Wind SJ
中科院分区:
文献类型:
--
作者:
Cai H;Muller J;Depoil D;Mayya V;Sheetz MP;Dustin ML;Wind SJ
Elucidating the rules for receptor triggering in cell-cell and cell-matrix contacts requires precise control of ligand positioning in three dimensions. Here, we use the T cell receptor (TCR) as a model and subject T cells to different geometric arrangements of ligands, using a nanofabricated single-molecule array platform. This is comprised of monovalent TCR ligands anchored to lithographically patterned nanoparticle clusters surrounded by mobile adhesion molecules on a supported lipid bilayer (SLB). The TCR ligand could be co-planar with the SLB (2D), excluding the CD45 transmembrane tyrosine phosphatase, or elevated by 10 nm on solid nanopedestals (3D), allowing closer access of CD45 to engaged TCR. The two configurations resulted in different T cell responses, depending on the lateral spacing between the ligands. These results identify the important contributions of lateral and axial components of ligand positioning and create a more complete foundation for receptor engineering for immunotherapy.
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