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Patterning alginate hydrogels using light-directed release of caged calcium in a microfluidic device

Citation:

Chueh B-han, Zheng Y, Torisawa Y-suke, Hsiao AY, Ge C, Hsiong S, Huebsch N, Franceschi R, Mooney DJ, Takayama S. Patterning alginate hydrogels using light-directed release of caged calcium in a microfluidic device. Biomed Microdevices. 2010;12 (1) :145-51.

Date Published:

2010 Feb

Abstract:

This paper describes a simple reversible hydrogel patterning method for 3D cell culture. Alginate gel is formed in select regions of a microfluidic device through light-triggered release of caged calcium. In the pre-gelled alginate solution, calcium is chelated by DM-nitrophen (DM-n) to prevent cross-linking of alginate. After sufficient UV exposure the caged calcium is released from DM-n causing alginate to cross-link. The effect of using different concentrations of calcium and chelating agents as well as the duration of UV exposure is described. Since the cross-linking is based on calcium concentration, the cross-linked alginate can easily be dissolved by EDTA. We also demonstrate application of this capability to patterned microscale 3D co-culture using endothelial cells and osteoblastic cells in a microchannel.
Last updated on 09/29/2017