Photodegradable iron(III) cross-linked alginate gels.

Abstract:

:Biocompatible photoresponsive materials are of interest for targeted drug delivery, tissue engineering, 2D and 3D protein patterning, and other biomedical applications. We prepared light degradable hydrogels using a natural alginate polysaccharide cross-linked with iron(III) cations. The "hard" iron(III) cations used to cross-link the alginate hydrogel were found to undergo facile photoreduction to "soft" iron(II) cations in the presence of millimolar concentrations of sodium lactate. The "soft" iron(II) cations have a decreased ability to cross-link the alginate which results in dissolution of the hydrogel and the formation of a homogeneous solution. The photodegradation is done using long wave UV or visible light at neutral pH. The very mild conditions required for the photodegradation and the high rate at which it occurs suggest applications for iron(III) cross-linked alginate hydrogels as light-controlled biocompatible scaffolds.

journal_name

Biomacromolecules

journal_title

Biomacromolecules

authors

Narayanan RP,Melman G,Letourneau NJ,Mendelson NL,Melman A

doi

10.1021/bm300707a

subject

Has Abstract

pub_date

2012-08-13 00:00:00

pages

2465-71

issue

8

eissn

1525-7797

issn

1526-4602

journal_volume

13

pub_type

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