Reporter Scaffolds for Clinically Relevant Cell Transplantation Studies

Area of Science:

• Biomaterials Science
• Cell Biology
• Regenerative Medicine

Background:

• Cell therapies, especially for retinal diseases, are advancing but require methods for tracking cell status.
• Current cell tracking methods like genetic manipulation have limitations, and fluorescent molecules are often cleared rapidly.
• Degradable scaffolds offer a potential strategy for sustained delivery and monitoring of cells.

Purpose of the Study:

• To investigate the use of degradable scaffolds for delivering and tracking fluorophores in cell therapy research.
• To determine if fluorophores encapsulated in scaffolds remain active after release and can report on cell status over time.
• To establish a foundation for using scaffolds as delivery vehicles for cellular reporting molecules.

Main Methods:

• Encapsulation of CellROX® Green Reagent and pHrodo™ Red AM into poly(lactic-co-glycolic acid) (PLGA) scaffolds.
• Fabrication of scaffolds under harsh conditions to assess material integrity and fluorophore stability.
• Evaluation of fluorophore release over weeks and their activity upon uptake by cells cultured on the scaffolds.

Main Results:

• Fluorophores were successfully encapsulated and delivered from PLGA scaffolds over several weeks.
• Released fluorophores retained activity and were effectively taken up by cells.
• The scaffold system demonstrated the ability to report on cell status over time.

Conclusions:

• Poly(lactic-co-glycolic acid) scaffolds can serve as effective delivery systems for active fluorophores.
• This scaffold-based approach provides a viable method for tracking cell status in preclinical cell therapy studies.
• The findings support the use of degradable scaffolds for delivering molecules that report on cellular behavior.