Galactose grafting on poly(ε-caprolactone) substrates for tissue engineering: a preliminary study.
Laura Russo1, Teresa Russo2, Chiara Battocchio3
1Dept. of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy.
Carbohydrate Research
|December 16, 2014
Summary
Grafting galactose units onto poly(ε-caprolactone) (PCL) enhances surface hydrophilicity and improves human mesenchymal stem cell adhesion and spreading. This surface modification maintains PCL
Area of Science:
- Biomaterials Science
- Surface Chemistry
- Tissue Engineering
Background:
- Poly(ε-caprolactone) (PCL) is a widely used biodegradable polymer in biomedical applications.
- Enhancing PCL's surface properties is crucial for improving its biocompatibility and cellular interactions.
- Current surface modification strategies for PCL often face challenges in maintaining mechanical integrity.
Purpose of the Study:
- To develop a novel wet chemistry method for grafting galactose units onto PCL substrates.
- To investigate the impact of galactose surface modification on the physicochemical and mechanical properties of PCL.
- To evaluate the effect of the modified PCL surface on human mesenchymal stem cell behavior.
Main Methods:
- Two-step wet chemistry procedure for galactose grafting onto PCL.
- Surface characterization using X-ray photoelectron spectroscopy (XPS) and enzyme-linked lectin assay (ELLA).
- Mechanical property assessment including hardness, tensile modulus, tensile strength, and small punch testing.
- Water contact angle measurements to evaluate hydrophilicity.
- In vitro biological evaluation using human mesenchymal stem cells (hMSCs).
Main Results:
- Successful grafting of galactose units onto PCL surfaces, confirmed by XPS and ELLA.
- Surface modification led to a significant decrease in hardness (0.58-0.31 GPa to 0.12-0.05 GPa) but did not compromise tensile modulus or strength.
- Enhanced hydrophilicity was observed, with water contact angle decreasing from 82.1±5.8° to 62.1±4.2°.
- Preliminary biological analysis demonstrated sustained hMSC viability and improved cell adhesion and spreading on modified PCL.
Conclusions:
- Galactose grafting via wet chemistry is an effective method to functionalize PCL surfaces.
- The surface modification enhances hydrophilicity and cell interaction without negatively impacting key mechanical properties.
- The modified PCL shows promise for applications in tissue engineering and regenerative medicine due to improved cellular response.
