Optimized Intravenous Injection in Adult Zebrafish

Area of Science:

• Zebrafish models
• Transplantation biology
• Drug delivery systems

Background:

• Intravenous (IV) injection is standard for systemic delivery in mammals.
• IV injection in adult zebrafish is challenging due to small size and vasculature.
• Existing methods like intracardiac and retro-orbital injections have limitations.

Purpose of the Study:

• To develop and optimize an intravenous injection technique for adult zebrafish.
• To overcome anatomical challenges for effective substance delivery.
• To improve survival rates and engraftment efficiency compared to other methods.

Main Methods:

• Developed a refined and optimized IV injection procedure for adult zebrafish.
• Administered whole kidney marrow cells and FITC-dextran dye via IV injection.
• Utilized fluorescence microscopy to track injected substances and assess engraftment.

Main Results:

• Successfully delivered cells and dye into adult Casper zebrafish via IV injection.
• Demonstrated successful engraftment and systemic distribution of injected materials.
• Achieved improved survival rates and engraftment efficiency compared to intracardiac and retro-orbital injections.

Conclusions:

• The optimized IV injection technique is effective for adult zebrafish.
• This method enhances precision, survival, and engraftment efficiency.
• Holds potential for large-scale drug screening and studying biological processes in zebrafish.