灌注速度对悬浮细胞在微流道中运动的影响
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国家自然科学基金项目(31870934)


Effects of Perfusion Velocity on Suspended Cells in Microchannels
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    摘要:

    目的 建立细胞灌注培养有限元模型,研究不同灌注速度对悬浮细胞运动的影响。方法 利用COMSOL Multiphysics建立细胞和微流道二维模型并进行网格划分,根据灌注速度不同分为3组,分别为u0=0.196 mm/s、u1=0.117 mm/s、u2=0.04 mm/s,利用流固耦合模块进行计算。结果 微流道中流场分布比较均匀。相同时间内,细胞悬液灌注速度之比u0∶u1∶u2=5∶3∶1,细胞在微流道中运动的位移之比D0∶D1∶D2=4.1∶2.9∶1,在速度成比例的情况下,细胞的位移也大致遵循相应的比例变化。灌注速度增加,会使细胞在运动过程中出现应力集中现象。细胞在运动过程中所受应力及流体剪切力均在安全值范围内,不会出现破坏现象。结论 采用一定速度进行灌注,能促使悬浮细胞不受损伤进入微流道内部;在体外组织工程产品的细胞种植时可以应用灌注技术。

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    Objective To establish a finite element model of cell perfusion culture, and study the effect of different perfusion speeds on the movement of suspended cells. Methods The two-dimensional (2D) model of cell and microchannels was established using COMSOL Multiphysics and meshed. Three groups were established according to the perfusion speed, namely, u0=0.196 mm/s, u1=0.117 mm/s, u2=0.04 mm/s. The fluid-structure interaction module was used for calculation. Results The flow field distribution in the microchannel was relatively uniform. During the equal period of time, the ratio of cell suspension perfusion speed was u0∶u1∶u2=5∶3∶1, and the ratio of cell displacement in the microchannel was D0∶D1∶D2=4.1∶ 2.9∶1. When the speed was proportional, the displacement of cells also roughly followed the corresponding proportional change. With the increase of perfusion speed, stress concentration in cells during movement would occur. The stress and fluid shear force (FSS) of cells during movement were within the safe value range, and cell destruction would not occur. Conclusions The suspended cells can enter into the microchannel without injury at a certain perfusion speed. Perfusion techniques can be used in cell implantation of in vitro tissue engineering products.

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邢彦雪,宋辉,杨彩仙,范佳玉,安美文.灌注速度对悬浮细胞在微流道中运动的影响[J].医用生物力学,2021,36(6):910-915

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  • 收稿日期:2020-12-16
  • 最后修改日期:2021-02-01
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  • 在线发布日期: 2021-12-23
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