Nerve Cells Decide to Orient inside an Injectable Hydrogel with Minimal Structural Guidance.

Nerve Cells Decide to Orient inside an Injectable Hydrogel with Minimal Structural Guidance.
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DOI:
10.1021/acs.nanolett.7b01123
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发表时间:
2017-06-14
期刊:
影响因子:
10.8
通讯作者:
De Laporte L
De Laporte L
中科院分区:
材料科学1区
文献类型:
--
作者:
Rose JC;Cámara-Torres M;Rahimi K;Köhler J;Möller M;De Laporte L

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Injectable biomaterials provide the advantage of a minimally invasive application but mostly lack the required structural complexity to regenerate aligned tissues. Here, we report a new class of tissue regenerative materials that can be injected and form an anisotropic matrix with controlled dimensions using rod-shaped, magnetoceptive microgel objects. Microgels are doped with small quantities of superparamagnetic iron oxide nanoparticles (0.0046 vol %), allowing alignment by external magnetic fields in the millitesla order. The microgels are dispersed in a biocompatible gel precursor and after injection and orientation are fixed inside the matrix hydrogel. Regardless of the low volume concentration of the microgels below 3%, at which the geometrical constrain for orientation is still minimum, the generated macroscopic unidirectional orientation is strongly sensed by the cells resulting in parallel nerve extension. This finding opens a new, minimal invasive route for therapy after spinal cord injury.
可降解聚酯支架具有受控表面化学,结合最小的蛋白质吸附和特定的生物活性
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