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Influence of hyaluronic acid modification on CD44 binding towards the design of hydrogel biomaterials
Journal article   Open access   Peer reviewed

Influence of hyaluronic acid modification on CD44 binding towards the design of hydrogel biomaterials

Mi Y. Kwon, Chao Wang, Jonathan H. Galarraga, Ellen Pure, Lin Han and Jason A. Burdick
Biomaterials, v 222, pp 119451-119451
01 Nov 2019
PMID: 31480001
url
https://doi.org/10.1016/j.biomaterials.2019.119451View
Accepted (AM)Maybe Open Access (Publisher Bronze) Open

Abstract

Engineering Engineering, Biomedical Materials Science Materials Science, Biomaterials Science & Technology Technology
Hyaluronic acid (HA) is a linear polysaccharide of D-glucuronic acid and N-acetyl-D-glucosamine that is native to many tissues and interacts with cells via cell-surface receptors (e.g., CD44). HA has been extensively explored as a chemically-modified macromer for crosslinking into biomaterials, such as hydrogels and macroporous scaffolds. However, the influence of the extent and type of HA modification on its binding to CD44 is not well understood or quantified. To address this, we modified HA at either the carboxylic acid or the primary alcohol with various chemical groups (e.g., norbomenes, methacrylates) and magnitudes (similar to 10, 20, or 40% of disaccharides) and then characterized binding in both soluble and hydrogel forms. HA binding to CD44 immobilized on plates or presented by cells was influenced by the extent and type of its modification, where increased modification (i.e., similar to 40%) generally decreased binding. The adhesion of CD44-modified beads to hydrogels as measured by atomic force microscopy revealed a similar trend, particularly with decreased adhesion with hydrophobic modifications to the carboxylic acid. Further, the chondrogenesis of mesenchymal stromal cells when encapsulated in hydrogels fabricated from modified HA macromers was reduced at high modification, behaving similarly to inert hydrogel controls. This work suggests that the types and extents of modification of polysaccharides are important factors that should be considered in preserving their biological function when processed as hydrogels.

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Collaboration types
Domestic collaboration
Web of Science research areas
Engineering, Biomedical
Materials Science, Biomaterials
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