Cell selective chitosan microparticles as injectable cell carriers for tissue regeneration

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Cell Biology

Background:

• Cell separation and expansion are crucial for cell therapy and regenerative medicine.
• Injectable systems offer minimally invasive solutions for tissue regeneration in vivo.
• Current methods face challenges in precise cell isolation and scalable expansion.

Purpose of the Study:

• To develop chitosan microparticles for efficient capture and expansion of specific cell types.
• To create an injectable biomaterial for in situ tissue engineering applications.
• To address key challenges in cell separation, scale-up, and injectable delivery.

Main Methods:

• Chitosan microparticles (115.8 μm) were fabricated.
• Monoclonal antibodies targeting endothelial and stem cell surface antigens were immobilized onto microparticles.
• The bioconjugated microparticles were used for cell capture and expansion.
• Injectability and in situ tissue construct formation were evaluated.

Main Results:

• Chitosan microparticles successfully captured target endothelial and stem cells.
• Immobilized antibodies provided effective surfaces for cell capture and subsequent expansion.
• The microparticles demonstrated suitability as an injectable biomaterial for forming tissue constructs in situ.
• The system addressed challenges in cell separation, scale-up, and injectable delivery.

Conclusions:

• Developed chitosan microparticles are effective for isolating and expanding specific cell types.
• These microparticles function as an injectable biomaterial for tissue engineering.
• The technology offers a promising solution for cell therapy and regenerative medicine.