Rapid intracerebroventricular injection assisted by an automatic syringe

Area of Science:

• Neuroscience
• Pharmacology
• Surgical Techniques

Background:

• Intracerebroventricular (ICV) injections are crucial for delivering substances to the central nervous system.
• Existing methods can be time-consuming and may lack precision, especially for group studies.
• Reproducible and rapid ICV administration is needed for efficient preclinical research.

Purpose of the Study:

• To describe a novel, rapid method for intracerebroventricular injections in conscious mice.
• To validate the reproducibility and efficiency of the described injection technique.
• To utilize the technique to assess the antinociceptive effects of clonidine in mice.

Main Methods:

• Utilized a small-volume gas-tight syringe with a repeating dispenser device for ICV injections.
• Administered injections rapidly to conscious mice, allowing for group studies.
• Employed the tail-immersion test to evaluate antinociceptive activity.

Main Results:

• The described technique achieved high reproducibility, with volume variations within 2% of the chosen volume.
• Facilitated rapid ICV injections, suitable for administering treatments to multiple animals efficiently.
• Demonstrated the antinociceptive activity of clonidine in the mouse model.

Conclusions:

• The developed method provides a reproducible and rapid approach for ICV injections in conscious mice.
• This technique enhances the efficiency of preclinical studies involving CNS drug delivery.
• The study successfully validated the antinociceptive properties of clonidine using this novel injection method.