Zebrafish Larva Orientation and Smooth Aspiration Control for Microinjection

Area of Science:

• Biomedical Engineering
• Developmental Biology
• Zebrafish Research

Background:

• Zebrafish are vital model organisms for in vivo research, particularly for studying biologics in developed organs.
• Current methods for manipulating zebrafish larvae for microinjection are inefficient and lack automation.
• A need exists for automated systems to facilitate precise and continuous manipulation of zebrafish larvae.

Purpose of the Study:

• To develop a novel automated zebrafish larva manipulation technique for microinjection.
• To enable efficient and continuous orientation and aspiration of zebrafish larvae.
• To reduce damage to zebrafish larvae during the microinjection process.

Main Methods:

• A customized microfluidic chip was designed for automated orientation control of zebrafish larvae.
• Larvae were automatically oriented to move tail-first towards the channel exit.
• A dynamic model of larva aspiration was established with an adaptive robust controller.

Main Results:

• The automated system achieved a high success rate in orienting and aspirating zebrafish larvae.
• Experimental results demonstrated reduced damage to the zebrafish larva body.
• The technique proved to be smooth and efficient in handling zebrafish larvae.

Conclusions:

• The presented automated zebrafish larva manipulation technique is effective for microinjection.
• The system offers advantages of low cost, easy implementation, and good stability.
• This innovation facilitates advanced in vivo studies using zebrafish as a model organism.