Issue 1, 2021

Effect of heparin and peptide conjugation on structure and functional properties of alginate in solutions and hydrogels

Abstract

Alginate decoration with more than one type of biomolecule is becoming a prevalent process in the pursuit to turn alginate hydrogels into synthetic extracellular matrices (ECMs). Here we present a systematic study of the structural–physical properties–function relationship of alginate–G4RGDY–heparin aqueous solutions and hydrogels. Small-angle X-ray scattering (SAXS) and rheology were used to characterize the systems’ nanostructure, viscosity of the solutions, and storage modulus of the hydrogels. The bioactivity of these gels was explored by evaluating their ability to sustain the release of vascular endothelial growth factor (VEGF). We show that the mode and order of conjugating the heparin and the peptide to the alginate backbone greatly affect the modified alginate hydrogels’ structure–properties–function relations. Moreover, we show that a detailed structural analysis of the conjugated architecture in solution can be used as a tool to adapt the properties of alginate–heparin–peptide hybrid hydrogels.

Graphical abstract: Effect of heparin and peptide conjugation on structure and functional properties of alginate in solutions and hydrogels

Supplementary files

Article information

Article type
Paper
Submitted
02 Sep 2020
Accepted
30 Nov 2020
First published
17 Dec 2020
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2021,2, 440-447

Effect of heparin and peptide conjugation on structure and functional properties of alginate in solutions and hydrogels

N. Goldberg, Y. Shmidov, O. Kryukov, D. Aranovich, S. Cohen and R. Bitton, Mater. Adv., 2021, 2, 440 DOI: 10.1039/D0MA00669F

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