Automated Cellular Injection System for High-Throughput Zebrafish Embryo Analysis
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Solution Overview
Problem
Current manual cell injection techniques for zebrafish embryos are laborious, lead to human fatigue, and result in low throughput and poor reproducibility, with existing automated systems failing to meet high-throughput needs due to issues like manual alignment errors, embryo size variability, and microneedle alignment challenges.
Innovation Solution
A high-throughput automated cellular injection system comprising motorized positioning devices, computer-controlled micropipettes, and vision-based control software for precise and reproducible injection, using an embryo holding device and pressure unit linked to a host computer for automated cell immobilization and material deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual cell injection techniques are used, then flexibility and adaptability are maintained, but throughput is low and reproducibility is poor
Solution Approach 1:
The system uses vision-based feedback to automatically locate embryos, calculate injection parameters, and guide the micropipette without human intervention. The computer control system processes images, determines injection targets, and executes injections autonomously, enabling the system to serve itself and achieve high throughput with consistent reproducibility
Solution Approach 2:
Manual mechanical manipulation by technicians is replaced with an automated system combining vision processing, computer control, and motorized micropipette positioning. The mechanical injection process is substituted with computer-controlled automation that maintains precision while dramatically increasing throughput and reproducibility
2Productivity
If microrobot-assisted cell injection systems are used, then some automation is achieved, but human involvement still results in low throughput
Solution Approach 1:
The system extracts and eliminates the human operator from the injection loop, using complete automation with vision-based feedback. By removing human involvement entirely, the system achieves high throughput without the limitations of manual operation, while the integrated computer control manages the complexity of coordinating vision processing and motorized injection
Solution Approach 2:
The computer control system performs multiple functions: processing vision images, calculating injection parameters, controlling micropipette positioning, and monitoring injection execution. This multi-functional integration manages system complexity while maximizing throughput through coordinated automation of all injection-related tasks
3Productivity
If MEMS-based injection systems are used, then high-throughput capability is achieved, but alignment errors and stiffness limitations reduce precision
Solution Approach 1:
The system uses vision-based feedback to continuously monitor embryo positions and micropipette locations, automatically calculating and adjusting injection parameters. This closed-loop feedback ensures high precision by adapting to actual positions rather than relying on pre-programmed coordinates, maintaining accuracy throughout high-throughput operation
Solution Approach 2:
The system employs dynamic positioning with real-time vision feedback rather than static pre-aligned positions. The computer control system continuously adjusts micropipette coordinates based on detected embryo locations, enabling high throughput while maintaining precision through adaptive, dynamic coordinate adjustment rather than fixed alignment
4Loss of time
If manually loading oocytes into plates is conducted, then flexibility is maintained, but time consumption increases
Solution Approach 1:
The system performs preliminary actions by automatically locating and tracking embryos using vision processing before injection begins. The computer control system pre-calculates injection parameters and positions based on vision-detected embryo locations, eliminating time-consuming manual loading and positioning operations while maintaining operational simplicity through automated sequence execution
Data Source
AI summary
An automated cell injection system and method are described, which can perform automatic, reliable, and high-throughput cell injection of foreign genetic materials, proteins, and other compounds. The system and method overcome the problems inherent in traditional manual injection that is characterized by poor reproducibility, human fatigue, and low throughput. The present invention is particularly suited for zebrafish embryo injection but can be readily extended to other biological injection applications such as mouse embryo, drosophila embryo, and C. elegans injections, capable of facilitating high-throughput genetic research at both academic and industry levels. A novel vacuum based cell-holding device is also provided.