کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7053809 1458012 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Theoretical and experimental study of a membrane-based microfluidics for loading and unloading of cryoprotective agents
ترجمه فارسی عنوان
بررسی تئوری و تجربی یک میکروفلوئیدیک بر اساس غشا برای بارگیری و تخلیه عوامل محافظتی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Cells are routinely cryopreserved for various applications. Successful cryopreservation requires the loading of cryoprotective agents (CPAs) to prevent cells from cryoinjury during freezing and thawing, as well as the unloading of CPAs before use since CPAs are often toxic. Moreover, the CPA loading/unloading processes are usually effortful and error-prone. In this study, a membrane-based microfluidic device is introduced to aid the CPA loading and unloading processes. The device consists of two helical microfluidic channels with a sandwiched layer of microfiltration membrane. CPA exchange across the membrane via diffusion and filtration is realized when cell suspension and replacement fluid flow counter-currently in the channels. CPA concentration in the cell suspension can be regulated in a well-controlled, progressive manner. A theoretical model has been developed to better characterize the dynamic change and distribution of the CPA concentration, as well as the cell volume response, with respect to various mass transfer parameters within the device during CPA loading and unloading steps. Physical experiments have been conducted to validate the proposed model. Furthermore, operating conditions of the device have been optimized under the guidance of the established model and different devices with various sizes have been fabricated to evaluate their performance characteristics with respect to different levels of throughput. The optimized condition enables the loading of DMSO (from 0% to 10%, v/v) at a rate of 180 ml/h and unloading (from 10% to 1%, v/v) at 5 ml/h with a single pass through the initial prototype. A second enlarged device further improves the DMSO unloading rate to 180 ml/h with the washing solution consumption rate at 225 ml/h. The higher throughput and reduced washing solution requirement demonstrate the significant advancement in efficiency with the presented approach. Lastly, the system is easy to operate and the process is robust, thus provides a reliable solution for loading/unloading of CPAs for various sized cell suspensions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 127, Part A, December 2018, Pages 637-644
نویسندگان
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