Impact of order and disorder in RGD nanopatterns on cell adhesion.

Impact of order and disorder in RGD nanopatterns on cell adhesion.
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DOI:
10.1021/nl803548b
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发表时间:
2009-03
期刊:
影响因子:
10.8
通讯作者:
Spatz JP
Spatz JP
中科院分区:
材料科学1区
文献类型:
--
作者:
Huang J;Grater SV;Corbellini F;Rinck S;Bock E;Kemkemer R;Kessler H;Ding J;Spatz JP

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在此,我们提出了一种新的平台,良好的控制有序和无序的nanopatteries定位与环肽的甘氨酸-天冬氨酸(RGD)的生物惰性聚(乙二醇)的背景,研究是否整合素特异性配体的空间图案化的纳米级顺序影响成骨细胞粘附。这是第一次定量地改变纳米级的RGD配体模式,并测试其对组织细胞粘附的影响。我们的研究结果表明,当全局平均配体间距大于70 nm时,由RGD配体诱导的整合素聚集和这种粘附依赖于底物上配体排列的局部顺序;即,如果在该配体间间距范围内操作,细胞粘附被RGD纳米图案有序性“关闭”,而被RGD纳米图案无序性“打开”。
We herein present a novel platform of well-controlled ordered and disordered nanopatterns positioned with a cyclic peptide of arginine-glycine-aspartic acid (RGD) on a bioinert poly(ethylene glycol) background, to study whether the nanoscopic order of spatial patterning of the integrin-specific ligands influences osteoblast adhesion. This is the first time that the nanoscale order of RGD ligand patterns was varied quantitatively, and tested for its impact on the adhesion of tissue cells. Our findings reveal that integrin clustering and such adhesion induced by RGD ligands is dependent on the local order of ligand arrangement on a substrate when the global average ligand spacing is larger than 70 nm; i.e., cell adhesion is “turned off” by RGD nanopattern order and “turned on” by the RGD nanopattern disorder if operating at this range of inter-ligand spacing.
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