Personalized Needles for Microinjections in the Rodent Brain

Area of Science:

• Neuroscience
• Biomedical Engineering
• Surgical Technology

Background:

• Microinjection is crucial for targeted drug, toxin, gene, or cell delivery in specific brain regions.
• Conventional steel and glass needles present limitations, including tissue damage and needle bending, compromising delivery accuracy.

Purpose of the Study:

• To introduce and detail a protocol for preparing and utilizing novel quartz needles for brain microinjection.
• To address the shortcomings of existing microinjection needles by offering enhanced precision, reduced tissue damage, and improved versatility.

Main Methods:

• Development of a protocol for fabricating quartz needles with customizable features, such as multiple holes and specific diameters.
• Evaluation of quartz needles for their rigidity, tissue compatibility, and delivery accuracy in deep brain regions.
• Assessment of the suitability of quartz needles for delivering various substances, including solutions and cells.

Main Results:

• Quartz needles demonstrate no detectable tissue damage upon insertion.
• The rigidity of quartz needles ensures reliable and accurate delivery to deep brain targets.
• Customizable needle designs, including multiple or large holes, facilitate efficient injection of solutions and cells.
• Quartz needles are reusable, offering a cost-effective alternative to disposable needles.

Conclusions:

• Quartz needles represent a significant advancement in brain microinjection technology.
• These needles provide a safer, more reliable, and versatile method for delivering therapeutics and cells to the brain.
• The protocol enables personalized needle design, optimizing delivery for diverse research applications and improving cost-efficiency.