Cyto-friendly polymerization at cell surfaces modulates cell fate by clustering cell-surface receptors.

Cyto-friendly polymerization at cell surfaces modulates cell fate by clustering cell-surface receptors.
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细胞表面的细胞友好聚合通过聚集细胞表面受体来调节细胞命运

DOI:
10.1039/c9sc06385d
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发表时间:
2020-03-25
期刊:
影响因子:
8.4
通讯作者:
Ji J
Ji J
中科院分区:
化学1区
文献类型:
--
作者:
Qi J;Li W;Xu X;Jin F;Liu D;Du Y;Wang J;Ying X;You J;Du Y;Ji J

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已经开发了许多策略,例如使用多价合成聚合物来控制细胞表面受体的空间分布,从而以定制的方式调节细胞功能和命运。然而,通过多价合成聚合物聚集细胞表面受体高度依赖于聚合物的结构以及配体密度,这可能给具有高密度配体的聚合物的合成带来困难。在这里,我们率先利用细胞表面的细胞友好聚合来聚集细胞表面受体。作为概念的证明,首先合成了抗CD 20适体缀合的大分子单体,然后通过配体-受体相互作用将其有效且稳定地引入Raji细胞表面。在引发剂,即过硫酸铵(APS)的帮助下,结合到Raji细胞表面上的大分子单体聚合,诱导CD 20受体的聚集,从而触发细胞凋亡。这种细胞表面聚合诱导的细胞表面受体交联可以替代地应用于调节其他细胞的命运和功能,特别是由细胞表面受体的空间分布介导的那些,例如T细胞活化。我们的工作在某种程度上为化学生物学领域开辟了新的可能性。抗CD 20适配子修饰的大分子单体在细胞表面聚合,诱导CD 20受体聚集,有效启动细胞凋亡信号。
Lots of strategies, e.g. using multivalent synthetic polymers, have been developed to control the spatial distribution of cell-surface receptors, thus modulating the cell function and fate in a custom-tailored manner. However, clustering cell-surface receptors via multivalent synthetic polymers is highly dependent on the structure as well as the ligand-density of the polymers, which may impose difficulties on the synthesis of polymers with a high density of ligands. Here, we pioneered the utilization of a cyto-friendly polymerization at the cell surface to cluster cell-surface receptors. As a proof of concept, an anti-CD20 aptamer conjugated macromer was initially synthesized, which was then efficiently and stably introduced onto the Raji cell surface via ligand–receptor interaction. With the assistance of an initiator, i.e. ammonium peroxysulfate (APS), the macromer bound onto the Raji cell surface polymerized, inducing the clustering of CD20 receptors, and thereby triggering cell apoptosis. This cell-surface polymerization induced cell-surface receptor crosslinking could alternatively be applied in modulating the fates and functions of other cells, especially those mediated by the spatial distribution of cell-surface receptors, such as T cell activation. Our work opens new possibilities in the area of chemical biology to some extent. Cell-surface polymerization of anti-CD20 aptamer modified macromer to induce CD20 receptor clustering, and effectively initiate the apoptotic signals in cells.
DOI: 10.1038/nmeth.3689
发表时间: 2016-02
期刊: Nature methods
影响因子: 48
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发表时间: 2015-08-17
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