Robot-Assisted Stereotactic Microinjection Method for Precision Cell Transplantation in Rat and Canine Models

Area of Science:

• Biomedical Engineering
• Neuroscience
• Regenerative Medicine

Background:

• Cell transplantation shows promise for treating neurodegenerative diseases.
• Precise and safe delivery of cells is crucial for therapeutic efficacy.
• Current microinjection techniques may cause tissue damage and suboptimal cell distribution.

Purpose of the Study:

• To develop and evaluate a robot-assisted stereotactic microinjection system for cell transplantation.
• To compare the efficacy of synchronous withdrawal injection (SWI) versus fixed-point injection (FPI).
• To assess the impact of injection parameters on graft viability and distribution.

Main Methods:

• Development of a robot-assisted stereotactic microinjection system.
• Comparison of SWI and FPI techniques in agarose and rat brain models.
• Evaluation of factors like needle gauge and injection rate on cell viability.
• In vitro dye dispersion tests and in vivo tissue injury assessments.
• Application of the system in canine models for accuracy and safety evaluation.

Main Results:

• SWI demonstrated superior dye dispersion compared to FPI in vitro.
• SWI resulted in reduced tissue injury and improved cell distribution in the rat striatum in vivo.
• The robot-assisted system enhanced accuracy and safety of cell graft delivery.
• Successful application in canine models validated the technique's potential.

Conclusions:

• The robot-assisted microinjection system, particularly with SWI, significantly improves cell transplantation accuracy and safety.
• This technique offers a promising advancement for clinical treatments of neurodegenerative disorders.
• Optimized injection parameters and methods are key to successful cell-based therapies.