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
Wind SJ
中科院分区:
材料科学1区
文献类型:
--
作者:
Cai H;Muller J;Depoil D;Mayya V;Sheetz MP;Dustin ML;Wind SJ

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阐明细胞-细胞和细胞-基质接触中受体触发的规则需要在三维空间中精确控制配体定位。在这里,我们使用T细胞受体(TCR)作为模型,并使用纳米制造的单分子阵列平台,将T细胞置于不同的配体几何排列中。这是由一价TCR配体锚定在由支持的脂质双分子层(SLB)上的移动粘附分子包围的光刻图案纳米颗粒团簇上。TCR配体可以与SLB共面(2D),排除CD45跨膜酪氨酸磷酸酶,或者在固体纳米基座上升高10 nm (3D),使CD45更接近所接合的TCR。这两种构型导致不同的T细胞反应,这取决于配体之间的横向间距。这些结果确定了配体定位的横向和轴向组分的重要贡献,并为免疫治疗的受体工程奠定了更完整的基础。
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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