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Thin Film Composite Silicon Elastomers for Cell Culture and Skin Applications: Manufacturing and Characterization

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Published on: July 3, 2018

Biocompatible, hyaluronic acid modified silicone elastomers.

Johan G Alauzun¹, Stuart Young, Renita D'Souza

¹Department of Chemistry, McMaster University, 1280 Main St. W., Hamilton ON L8S 4M1, Canada.

|February 9, 2010

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This study covalently linked hyaluronic acid (HA) to poly(dimethylsiloxane) (PDMS) surfaces. HA modification improved cell interactions and reduced protein adsorption, enhancing silicone biocompatibility for biomedical applications.

Area of Science:

Biomaterials Science
Surface Chemistry
Cell Biology

Background:

Silicones (poly(dimethylsiloxane), PDMS) are useful biomaterials but their hydrophobicity limits cell growth.
Surface modification with hydrophilic polymers like poly(ethylene glycol) can improve hydrophilicity but may hinder cell adhesion.
Hyaluronic acid (HA) possesses known biological properties beneficial for cell interactions.

Purpose of the Study:

To synthesize and characterize PDMS surfaces covalently modified with hyaluronic acid (HA).
To evaluate the impact of HA modification on protein adsorption and cellular response.
To assess the potential of HA-modified PDMS for improved biocompatibility in bioapplications.

Main Methods:

Covalent linkage of 35 kDa hyaluronic acid (HA) to poly(dimethylsiloxane) (PDMS) elastomer surfaces via tosyl-modified poly(ethylene glycol) linkers.

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Surface characterization using water contact angle, ATR-FTIR, XPS, and (13)C solid-state NMR spectroscopy.

Assessment of biological interactions, including fibrinogen adsorption and in vitro responses of fibroblast (3T3) and human corneal epithelial cells.

Main Results:

Successful synthesis and characterization of HA-modified PDMS surfaces.
HA modification significantly enhanced interactions with fibroblast and corneal epithelial cells.
Reduced protein (fibrinogen) adsorption was observed on HA-modified surfaces compared to unmodified PDMS.
Water contact angle measurements indicated increased surface hydrophilicity after HA modification.

Conclusions:

Covalent attachment of hyaluronic acid (HA) to poly(dimethylsiloxane) (PDMS) surfaces enhances biocompatibility.
HA modification promotes favorable cell interactions and reduces non-specific protein adsorption.
These findings suggest HA-modified PDMS is a promising material for various biomedical applications requiring improved cell integration and reduced fouling.