Biodegradable Cell Microcarriers Based on Chitosan/Polyester Graft-Copolymers

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Tissue Engineering

Background:

• Biodegradable microcarriers are crucial for drug delivery and tissue engineering.
• Traditional microcarrier production often relies on emulsifiers, which can complicate purification and affect biocompatibility.
• Chitosan-based copolymers offer tunable properties for biomaterial applications.

Purpose of the Study:

• To develop novel, self-stabilizing biodegradable microcarriers using amphiphilic chitosan-g-polyester copolymers.
• To achieve high microcarrier yields without the use of external emulsifiers.
• To evaluate the performance of these microcarriers in supporting cell growth in vitro.

Main Methods:

• Oil/water solvent evaporation technique was employed.
• Amphiphilic chitosan-g-polyester copolymers were synthesized and used as the core material.
• Microparticle self-stabilization kinetics were monitored during production.
• Cell morphology and proliferation were assessed after one week of in vitro cultivation.

Main Results:

• High yields (up to 79 wt. %) of copolymer-based microparticles were achieved without emulsifiers.
• Microparticle self-stabilization was correlated with copolymer moiety migration to the oil/water interface.
• The microcarriers exhibited a favorable surface/volume ratio and bioadhesive surface fragments.
• Successful cell cultivation demonstrated good cell morphology and proliferation on the microcarriers.

Conclusions:

• Self-stabilizing biodegradable microcarriers can be efficiently produced using chitosan-polyester copolymers via solvent evaporation.
• The developed microcarriers demonstrate excellent yield and biocompatibility, supporting cell growth.
• This approach offers a promising alternative to traditional emulsifier-dependent methods for microcarrier fabrication.