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Dynamic cell patterning of photoresponsive hyaluronic acid hydrogels

Identifieur interne : 000A61 ( Main/Exploration ); précédent : 000A60; suivant : 000A62

Dynamic cell patterning of photoresponsive hyaluronic acid hydrogels

Auteurs : Catherine A. Goubko [Canada] ; Ajoy Basak [Canada] ; Swapan Majumdar [Canada] ; Xudong Cao [Canada]

Source :

Journal of Biomedical Materials Research Part A [ 1549-3296 ] ; 2014-02.

RBID : ISTEX:E655C4EFDAFDA71A2944805784B27A8FAA75D475

Abstract

Techniques to pattern cells on biocompatible hydrogels allow for the creation of highly controlled cell microenvironments within materials that mimic the physicochemical properties of native tissues. Such technology has the potential to further enhance our knowledge of cell biology and to play a role in the development of novel tissue engineering devices. Light is an ideal stimulus to catalyze pattern formation since it can be controlled spatially as well as temporally. Herein, we have developed and enhanced a hydrogel cell patterning strategy. It is based on photoactive caged RGDS peptides incorporated into a hyaluronic acid (HA) hydrogel, which can be subsequently activated with near‐UV light to create cell‐adhesive regions within an otherwise non‐adhesive hydrogel. With this strategy, we have been able to pattern multiple cell populations—either in contact with one another or held apart—on an underlying chemically patterned HA hydrogel. Furthermore, the hydrogel cell pattern could be altered with time, even 2 weeks after initial seeding, to create additional adhesive regions to regulate the direction of cell growth and migration. These dynamic hydrogel cell patterns, created with a standard fluorescence microscope, were shown to be robust and lasted at least 3 weeks in vitro. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 102A: 381–391, 2014.

Url:

DOI: 10.1002/jbm.a.34712

Affiliations:

Canada

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<front><div type="abstract">Techniques to pattern cells on biocompatible hydrogels allow for the creation of highly controlled cell microenvironments within materials that mimic the physicochemical properties of native tissues. Such technology has the potential to further enhance our knowledge of cell biology and to play a role in the development of novel tissue engineering devices. Light is an ideal stimulus to catalyze pattern formation since it can be controlled spatially as well as temporally. Herein, we have developed and enhanced a hydrogel cell patterning strategy. It is based on photoactive caged RGDS peptides incorporated into a hyaluronic acid (HA) hydrogel, which can be subsequently activated with near‐UV light to create cell‐adhesive regions within an otherwise non‐adhesive hydrogel. With this strategy, we have been able to pattern multiple cell populations—either in contact with one another or held apart—on an underlying chemically patterned HA hydrogel. Furthermore, the hydrogel cell pattern could be altered with time, even 2 weeks after initial seeding, to create additional adhesive regions to regulate the direction of cell growth and migration. These dynamic hydrogel cell patterns, created with a standard fluorescence microscope, were shown to be robust and lasted at least 3 weeks in vitro. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 102A: 381–391, 2014.</div>
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Dynamic cell patterning of photoresponsive hyaluronic acid hydrogels

Dynamic cell patterning of photoresponsive hyaluronic acid hydrogels

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