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Microfluidic platform for 3D cell culture with live imaging and clone retrieval.
Lab on a Chip ( IF 6.1 ) Pub Date : 2020-06-23 , DOI: 10.1039/d0lc00165a
Carla Mulas 1 , Andrew C Hodgson , Timo N Kohler , Chibeza C Agley , Peter Humphreys , Hans Kleine-Brüggeney , Florian Hollfelder , Austin Smith , Kevin J Chalut
Affiliation  

Combining live imaging with the ability to retrieve individual cells of interest remains a technical challenge. Combining imaging with precise cell retrieval is of particular interest when studying highly dynamic or transient, asynchronous, or heterogeneous cell biological and developmental processes. Here, we present a method to encapsulate live cells in a 3D hydrogel matrix, via hydrogel bead compartmentalisation. Using a small-scale screen, we optimised matrix conditions for the culture and multilineage differentiation of mouse embryonic stem cells. Moreover, we designed a custom microfluidic platform that is compatible with live imaging. With this platform we can long-term culture and subsequently extract individual cells-in-beads by media flow only, obviating the need for enzymatic cell removal from the platform. Specific beads may be extracted from the platform in isolation, without disrupting the adjacent beads. We show that we can differentiate mouse embryonic stem cells, monitor reporter expression by live imaging, and retrieve individual beads for functional assays, correlating reporter expression with functional response. Overall, we present a highly flexible 3D cell encapsulation and microfluidic platform that enables both monitoring of cellular dynamics and retrieval for molecular and functional assays.

中文翻译:

用于 3D 细胞培养的微流体平台,具有实时成像和克隆检索功能。

将实时成像与检索感兴趣的单个细胞的能力相结合仍然是一个技术挑战。在研究高度动态或瞬态、异步或异质细胞生物和发育过程时,将成像与精确细胞检索相结合特别有意义。在这里,我们提出了一种通过水凝胶珠分隔将活细胞封装在 3D 水凝胶基质中的方法。使用小规模筛选,我们优化了小鼠胚胎干细胞培养和多系分化的基质条件。此外,我们设计了一个与实时成像兼容的定制微流体平台。借助该平台,我们可以长期培养,然后仅通过培养基流提取珠中的单个细胞,从而无需从平台中去除酶促细胞。可以从平台中分离地提取特定的珠子,而不破坏相邻的珠子。我们证明,我们可以区分小鼠胚胎干细胞,通过实时成像监测报告基因表达,并检索单个珠子进行功能测定,将报告基因表达与功能反应相关联。总的来说,我们提出了一个高度灵活的 3D 细胞封装和微流体平台,可以监测细胞动力学并检索分子和功能测定。
更新日期:2020-07-14
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