A structurally tunable DNA-based extracellular matrix.

A structurally tunable DNA-based extracellular matrix.
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基于结构可调的基于DNA的细胞外基质。

DOI:
10.1021/ja105431h
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发表时间:
2010-10-27
影响因子:
15
通讯作者:
Way JC
Way JC
中科院分区:
化学1区
文献类型:
--
作者:
Aldaye FA;Senapedis WT;Silver PA;Way JC

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DNA纳米技术和蛋白质工程的原理已经结合起来,产生了一类新的人工细胞外基质。使用实验证明了这种材料用于离体细胞支架的潜力,在实验中发现人宫颈癌细胞粘附牢固,保持存活,并以高迁移率生长。在我们的基于DNA/蛋白质的基质中使用DNA使得这些结构固有地服从结构可调性。通过将单链结构域工程化到DNA部分中,我们能够微调细胞所感知的支架的持久长度和刚度。这被用来指导细胞的细胞骨架排列和整体形状的结果,其信号转导蛋白p-FAK的状态,以及其细胞内转录因子FOXO 1a的定位。这一贡献奠定了基础的可编程细胞外基质,可以带来系统的研究和复制的自然发生的细胞外生态位的简易和模块化的建设。
The principles of DNA nanotechnology and protein engineering have been combined to generate a new class of artificial extracellular matrices. The potential of this material for ex vivo cellular scaffolding was demonstrated using experiments in which human cervical cancer cells were found to adhere strongly, stay alive, and grow with high migration rates. The use of DNA in our DNA/protein-based matrices makes these structures inherently amenable to structural tunability. By engineering single-stranded domains into the DNA portions, we were able to fine-tune the scaffold’s persistence length and stiffness as perceived by cells. This was used to direct the outcome of the cell’s cytoskeletal arrangement and overall shape, the status of its signal transduction protein p-FAK, and the localization of its intracellular transcription factors FOXO1a. This contribution lays the groundwork for the facile and modular construction of programmable extracellular matrices that can bring about the systematic study and replication of the naturally occurring extracellular niche.
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