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Collagen-coated polylactide microspheres as chondrocyte microcarriers
Yi Hong1, Changyou Gao, Ying Xie
1Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
Biomaterials
|May 26, 2005
Summary
Collagen-coated polylactide (PLA) microspheres were developed for cell culture. These enhanced PLA microspheres effectively support chondrocyte attachment, proliferation, and spreading, showing promise as injectable cell carriers.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Cell Biology
Background:
- Polylactide (PLA) microspheres are utilized in biomedical applications.
- Developing effective cell carriers requires biocompatible surface modifications.
- Collagen coating enhances cell interaction with biomaterials.
Purpose of the Study:
- To create collagen-coated PLA microspheres for cell culture and injectable cell carriers.
- To functionalize PLA microspheres with collagen type I.
- To evaluate the efficacy of these microspheres in supporting chondrocyte growth.
Main Methods:
- PLA microspheres prepared via emulsion-solvent evaporation (180-280 microm).
- Surface functionalization through aminolysis, glutaraldehyde treatment, and covalent collagen coupling.
- Collagen immobilization via Schiff base formation.
- Quantitative analysis of surface amino and collagen content.
Main Results:
- Successful covalent coupling of collagen type I onto PLA microspheres.
- Collagen coating amount correlated with surface amino group content.
- Aminolysis led to weight loss in a time-dependent manner.
- In vitro chondrocyte culture demonstrated cell attachment, proliferation, and spreading on coated microspheres.
Conclusions:
- Collagen-coated PLA microspheres support chondrocyte growth.
- These microspheres show potential as effective cell microcarriers for regenerative medicine.
- Surface modification with collagen enhances the biocompatibility of PLA-based scaffolds.