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Related Experiment Video

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Development and Characterization of Fusidic Acid-Loaded Alginate-Aloe vera Based Hydrogel Film

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Poly (lactic-co-glycolic acid) as a controlled release delivery device.

Tee Yong Lim¹, Chye Khoon Poh, W Wang

¹Department of Orthopaedic Surgery, National University of Singapore, Kent Ridge, Singapore, Singapore. doslty@nus.edu.sg

Journal of Materials Science. Materials in Medicine

|March 14, 2009

Summary

Researchers developed a novel method to coat unmodified Poly (lactic-co-glycolic acid) (PLGA) with angiogenic factors. This technique enables controlled release of vascular endothelial growth factor (VEGF) to promote stem cell differentiation for tissue engineering applications.

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Area of Science:

Biomaterials Science
Tissue Engineering
Regenerative Medicine

Background:

Poly (lactic-co-glycolic acid) (PLGA) is a widely used biodegradable polymer in resorbable sutures and tissue engineering due to its tunable degradation rate and mechanical properties.
Functionalizing PLGA with bioactive molecules often requires chemical modifications that can compromise material integrity and molecule efficacy.
Developing methods to incorporate bioactive factors into PLGA without compromising its properties is crucial for advanced biomedical applications.

Purpose of the Study:

To investigate a method for coating unmodified PLGA suture substrates with an angiogenic factor.
To assess the potential of this coating to induce differentiation of human mesenchymal stem cells (hMSCs) into endothelial cells (ECs).
To explore the utility of this approach for creating functional, controlled-release PLGA-based delivery devices.

Main Methods:

Coating of unmodified PLGA suture substrates with vascular endothelial growth factor (VEGF).
Assessing the gradual release of VEGF from the PLGA surface into solution.
Evaluating the differentiation of human mesenchymal stem cells (hMSCs) into endothelial cells (ECs) induced by the released VEGF.

Main Results:

The developed coating method successfully anchored VEGF onto the PLGA surface.
Gradual release of VEGF from the PLGA substrate was observed.
The released VEGF effectively induced the differentiation of hMSCs into ECs.

Conclusions:

A novel, non-chemical modification method enables the functionalization of PLGA with angiogenic factors.
This technique facilitates controlled release of VEGF, promoting stem cell differentiation for tissue regeneration.
The approach holds promise for creating advanced PLGA materials, such as sutures, meshes, and scaffolds, as effective controlled-release delivery systems for various bioactive molecules.