Extrusion-Based 3D Bioprinting of Gradients of Stiffness, Cell Density, and Immobilized Peptide Using Thermogelling Hydrogels.

Extrusion-Based 3D Bioprinting of Gradients of Stiffness, Cell Density, and Immobilized Peptide Using Thermogelling Hydrogels.
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DOI:
10.1021/acsbiomaterials.1c00183
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发表时间:
2021-06-14
影响因子:
5.8
通讯作者:
Forget A
Forget A
中科院分区:
工程技术2区
文献类型:
--
作者:
Kuzucu M;Vera G;Beaumont M;Fischer S;Wei P;Shastri VP;Forget A

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为了在体外研究生物过程,基于生物材料的工程解决方案,以重现在组织中观察到的梯度是必要的。我们提出了一个基于羧化琼脂糖的功能梯度生物材料的3D生物打印平台,这是一种可通过挤出生物打印实现的生物墨水。使用这种生物墨水,打印出具有刚度梯度和细胞浓度梯度的物体。用马来酰亚胺部分官能化羧基化琼脂糖,在几分钟内与半胱氨酸终止的细胞粘附肽反应,使我们能够用固定肽的梯度打印物体。这种方法为发展具有梯度的组织模拟物铺平了道路。
To study biological processes in vitro, biomaterials-based engineering solutions to reproduce the gradients observed in tissues are necessary. We present a platform for the 3D bioprinting of functionally graded biomaterials based on carboxylated agarose, a bioink amendable by extrusion bioprinting. Using this bioink, objects with a gradient of stiffness and gradient of cell concentration were printed. Functionalization of carboxylated agarose with maleimide moieties that react in minutes with a cysteine-terminated cell-adhesion peptide allowed us to print objects with a gradient of an immobilized peptide. This approach paves the way toward the development of tissue mimics with gradients.
DOI: 10.1002/adma.201604630
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