Nano Archive

A microfluidic traps system supporting prolonged culture of human embryonic stem cells aggregates

Khoury, Maria and Bransky, Avishay and Korin, Natanel and Konak, Limor Chen and Enikolopov, Grigori and Tzchori, Itai and Levenberg, Shulamit (2010) A microfluidic traps system supporting prolonged culture of human embryonic stem cells aggregates. Biomedical Microdevices, 12 (6). pp. 1001-1008.

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Official URL: http://www.springerlink.com/content/74273385277126...

Abstract

The unlimited proliferative and differentiative capacities of embryonic stem cells (ESCs) are tightly regulated by their microenvironment. Local concentrations of soluble factors, cell-cell interactions and extracellular matrix signaling are just a few variables that influence ESC fate. A common method employed to induce ESC differentiation involves the formation of cell aggregates called embryoid bodies (EBs), which recapitulate early stages of embryonic development. EBs are normally formed in suspension cultures, producing heterogeneously shaped and sized aggregates. The present study demonstrates the usage of a microfluidic traps system which supports prolonged EB culturing. The traps are uniquely designed to facilitate cell capture and aggregation while offering efficient gas/nutrients exchange. A finite element simulation is presented with emphasis on several aspects critical to appropriate design of such bioreactors for ESC culture. Finally, human ESC, mouse Nestin-GFP ESC and OCT4-EGFP ESCs were cultured using this technique and demonstrated extended viability for more than 5 days. In addition, EBs developed and maintained a polarized differentiation pattern, possibly as a result of the nutrient gradients imposed by the traps bioreactor. The novel microbioreactor presented here can enhance future embryogenesis research by offering tight control of culturing conditions.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:9892
Deposited By:JNCASR
Deposited On:26 Nov 2010 05:41
Last Modified:26 Nov 2010 05:41

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