A multilayered approach to scale-up forced convection-based freezing of human induced pluripotent stem cells

A multilayered approach to scale-up forced convection-based freezing of human induced pluripotent stem cells
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一种多层方法,用于扩大基于强制对流的人类诱导多能干细胞的冷冻

DOI:
10.1016/j.compchemeng.2022.107851
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发表时间:
2022
影响因子:
4.3
通讯作者:
Sugiyama Hirokazu
Sugiyama Hirokazu
中科院分区:
工程技术2区
文献类型:
--
作者:
Scholz Benedikt X.;Hayashi Yusuke;Udugama Isuru A.;Kino-oka Masahiro;Sugiyama Hirokazu

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这项工作提出了一种基于多层模型的方法,以扩大缓慢和强制对流为基础的冷冻人类诱导多能干细胞。该方法结合了混合单细胞冷冻模型(覆盖细胞和冷冻层)与计算流体动力学模型(覆盖冷冻层)。所提出的方法可以计算细胞存活率,考虑空间和时间依赖的温度分布在一个冷冻单元。该方法首先证明了一个单一的冷冻管的问题,它被发现,入口冷却剂的速度影响细胞存活率时,快速冷却速率。然后研究了235个冷冻管的冷冻,其中18个操作条件,包括6个冷却速率(分别为3个恒定和非恒定冷却速率)和3个入口冷却剂速度进行了研究。多层的方法捕获的空间异质性的细胞存活率为一个给定的入口冷却剂的速度和温度分布。
This work presents a multilayered model-based approach to scale-up slow and forced convection-based freezing of human induced pluripotent stem cells. The approach combines a hybrid single-cell freezing model (covering the cell and cryovial layers) with a computational fluid dynamics model (covering the freezer layer). The proposed approach can calculate the cell survival rate considering spatial and time-dependent temperature profiles within a freezer unit. The approach was first demonstrated on a single cryovial problem where it was found that the inlet coolant velocity affected the cell survival rate when fast cooling rates were applied. The freezing of 235 cryovials was then studied, where 18 operation conditions consisting of six cooling rates (three constant and non-constant cooling rates, respectively) and three inlet coolant velocities were investigated. The multilayered approach captured the spatial heterogeneity in the cell survival rates for a given inlet coolant velocity and temperature profile.
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