Luciferase therapeutic microcapsules for gene therapy

Area of Science:

• Biotechnology
• Cell Biology
• Biomedical Engineering

Background:

• Monitoring microencapsulated cells is crucial for assessing viability and function.
• Luciferase reporter systems offer a sensitive method for tracking biological processes.

Purpose of the Study:

• To evaluate luciferase as a reporter for monitoring gene expression and viability of encapsulated Madin-Darby Canine Kidney (MDCK) cells.
• To compare the stability of luciferase expression driven by different promoters (CMV and UbB) in encapsulated cells.

Main Methods:

• MDCK cells engineered for luciferase expression (CMV or UbB promoter) were encapsulated in alginate-poly-L-lysine-alginate microcapsules.
• In vitro and in vivo experiments quantified luciferase signals from encapsulated cells.
• Cell viability was assessed post-implantation.

Main Results:

• Luciferase signals correlated linearly with the number of encapsulated cells.
• CMV-driven expression showed a rapid signal decrease post-implantation, while UbB-driven expression remained stable.
• Encapsulated cells maintained good viability despite signal fluctuations.

Conclusions:

• Luciferase serves as a viable marker for monitoring microencapsulated cells.
• The UbB promoter demonstrates superior stability for long-term reporter gene expression in encapsulated cell systems.
• This approach enables quantitative assessment of cell viability and gene expression in biomedical applications.