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Science China Life Sciences

, Volume 57, Issue 2, pp 221–231

First Online: 16 January 2014Received: 20 August 2013Accepted: 12 October 2013DOI: 10.1007-s11427-014-4609-2

Cite this article as: Jiang, L., Liu, J., Wang, K. et al. Sci. China Life Sci. 2014 57: 221. doi:10.1007-s11427-014-4609-2

Abstract

Immunoisolation is an important strategy to protect transplanted cells from rejection by the host immune system. Recently, microfabrication techniques have been used to create hydrogel membranes to encapsulate microtissue in an arrayed organization. The method illustrates a new macroencapsulation paradigm that may allow transplantation of a large number of cells with microscale spatial control, while maintaining an encapsulation device that is easily maneuverable and remaining integrated following transplantation. This study aims to investigate the design principles that relate to the translational application of micropatterned encapsulation membranes, namely, the control over the transplantation density-quantity of arrayed microtissues and the fidelity of pre-formed microtissues to micropatterns. Agarose hydrogel membranes with microwell patterns were used as a model encapsulation system to exemplify these principles. Our results show that high-density micropatterns can be generated in hydrogel membranes, which can potentially maximize the percentage volume of cellular content and thereby the transplantation efficiency of the encapsulation device. Direct seeding of microtissues demonstrates that microwell structures can efficiently position and organize pre-formed microtissues, suggesting the capability of micropatterned devices for manipulation of cellular transplants at multicellular or tissue levels. Detailed theoretical analysis was performed to provide insights into the relationship between micropatterns and the transplantation capacity of membrane-based encapsulation. Our study lays the ground for developing new macroencapsulation systems with microscale cellular-tissue patterns for regenerative transplantation.

Keywordshydrogel micropattern array multi-cellular spheroids macroencapsulation This article is published with open access at link.springer.com

Electronic Supplementary MaterialSupplementary material is available for this article at 10.1007-s11427-014-4609-2 and is accessible for authorized users.

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Autor: LiYang Jiang - JiaYing Liu - Kai Wang - Xi Gu - Ying Luo

Fuente: https://link.springer.com/







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