The Arp2/3 complex binding protein HS1 is required for efficient dendritic cell random migration and force generation.

The Arp2/3 complex binding protein HS1 is required for efficient dendritic cell random migration and force generation.
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DOI:
10.1039/c7ib00070g
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发表时间:
2017-08-14
期刊:
Integrative biology : quantitative biosciences from nano to macro
影响因子:
--
通讯作者:
Hammer DA
Hammer DA
中科院分区:
其他
文献类型:
--
作者:
Bendell AC;Williamson EK;Chen CS;Burkhardt JK;Hammer DA

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树突状细胞迁移到淋巴结的富含T细胞的区域对于它们启动适应性免疫应答的能力至关重要。虽然已经表明肌动蛋白细胞骨架是正常DC迁移所需的,但许多单个细胞骨架分子的作用知之甚少。在这项研究中,我们研究了Arp 2/3复合物结合蛋白,造血谱系细胞特异性蛋白1(HS 1),DC迁移和力的产生的贡献。我们量化了HS 1 −/− DC在2D微接触打印表面上的随机迁移,发现在没有HS 1的情况下,DC的运动性和速度大大降低。当向WT DC中加入Arp 2/3复合物抑制剂或使用缺乏WASP(Arp 2/3复合物依赖性肌动蛋白聚合的激活剂)的DC时,运动性的这种相同降低被重现。我们通过测量HS 1 −/− DC对微柱阵列探测器(mPAD)的牵引力进一步研究了HS 1的重要性。与WT DC(13.76 ± 0.84 nN/细胞)相比,HS 1缺陷DC的力产生(3.96 ± 0.40 nN/细胞)显着降低。有趣的是,与WT DC相比,缺乏WASP的DC中产生的力仅略微降低。总之,这些发现表明,HS 1和Arp 2/3复合物介导的肌动蛋白聚合是最有效的DC随机迁移和力的产生所必需的。
Dendritic cell migration to the T-cell-rich areas of the lymph node is essential for their ability to initiate the adaptive immune response. While it has been shown that the actin cytoskeleton is required for normal DC migration, the role of many of the individual cytoskeletal molecules is poorly understood. In this study, we investigated the contribution of the Arp2/3 complex binding protein, haematopoietic lineage cell-specific protein 1 (HS1), to DC migration and force generation. We quantified the random migration of HS1−/− DCs on 2D micro-contact printed surfaces and found that in the absence of HS1, DCs have greatly reduced motility and speed. This same reduction in motility was recapitulated when adding Arp2/3 complex inhibitor to WT DCs or using DCs deficient in WASP, an activator of Arp2/3 complex-dependent actin polymerization. We further investigated the importance of HS1 by measuring the traction forces of HS1−/− DCs on micropost array detectors (mPADs). In HS1 deficient DCs, there was a significant reduction in force generation (3.96 ± 0.40 nN/cell) compared to WT DCs (13.76 ± 0.84 nN/cell). Interestingly, the forces generated in DCs lacking WASP were only slightly reduced compared to WT DCs. Taken together, these findings show that HS1 and Arp2/3 complex-mediated actin polymerization are essential for the most efficient DC random migration and force generation.
DOI: 10.1016/s0960-9822(01)00152-x
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