Cell encapsulation in gelatin methacryloyl bioinks impairs microscale diffusion properties.

Cell encapsulation in gelatin methacryloyl bioinks impairs microscale diffusion properties.
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DOI:
10.3389/fbioe.2023.1193970
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发表时间:
2023
影响因子:
5.7
通讯作者:
--
中科院分区:
工程技术2区
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--
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光辅助生物打印明胶甲基丙烯酰(GelMA)构建体已用于载有细胞的微组织和类器官。GelMA可以被期望的细胞加载,其可以调节生物打印的构建体的生物物理性质。我们研究了甲基丙烯酸化程度(MA度),GelMA质量浓度,和细胞密度如何改变质量传递特性。我们介绍了一种基于荧光显微镜的生物转运测试方法,与传统的颗粒跟踪方法相比,该方法具有更高的灵敏度。与较低MA相比,具有较高MA的GelMA的扩散能力显著降低。与线性弹性模量的稳定范围相反,当细胞密度在0至10 × 106个细胞/ml范围内时,GelMA中的扩散系数变化。不同细胞大小的比较研究表明,较大细胞的情况下,更高的扩散系数。这项研究的结果可以帮助生物工程师和科学家更好地控制光辅助生物打印微组织和类器官中的生物运输特性。
Light-assisted bioprinted gelatin methacryloyl (GelMA) constructs have been used for cell-laden microtissues and organoids. GelMA can be loaded by desired cells, which can regulate the biophysical properties of bioprinted constructs. We study how the degree of methacrylation (MA degree), GelMA mass concentration, and cell density change mass transport properties. We introduce a fluorescent-microscopy-based method of biotransport testing with improved sensitivity compared to the traditional particle tracking methods. The diffusion capacity of GelMA with a higher MA significantly decreased compared to a lower MA. Opposed to a steady range of linear elastic moduli, the diffusion coefficient in GelMA varied when cell densities ranged from 0 to 10 × 106 cells/ml. A comparative study of different cell sizes showed a higher diffusivity coefficient for the case of larger cells. The results of this study can help bioengineers and scientists to better control the biotransport characteristics in light-assisted bioprinted microtissues and organoids.
DOI: 10.1088/1758-5090/ac2d78
发表时间: 2021-11-24
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