A microfabricated array of clamps for immobilizing and imaging C. elegans

Area of Science:

• Biotechnology
• Microfluidics
• Neuroscience

Background:

• High-throughput analysis of Caenorhabditis elegans (C. elegans) is crucial for understanding complex biological processes.
• Existing methods for immobilizing C. elegans for analysis are often time-consuming and labor-intensive.
• Developing efficient and non-damaging immobilization techniques is essential for advancing C. elegans research.

Purpose of the Study:

• To fabricate and validate a novel microfluidic device for the rapid, high-throughput immobilization of live C. elegans.
• To enable parallelized morphological analysis, microsurgery, and fluorescence imaging of C. elegans populations.
• To provide a tool for investigating physiology and behavior in large C. elegans populations.

Main Methods:

• Fabrication of a microfluidic device featuring 128 wedge-shaped microchannels (clamps) and a distribution network.
• Utilizing a constant pressure difference to drive fluid flow, automatically distributing individual worms into clamps.
• Assessing the immobilization efficiency, time, and impact on worm viability and reproduction.

Main Results:

• Successfully immobilized over 100 live C. elegans in under 15 minutes using the microfluidic device.
• Demonstrated that the immobilization process is non-damaging, with worms exhibiting normal lifespans and reproduction post-removal.
• The device effectively distributes individual worms into the microchannel array for parallel analysis.

Conclusions:

• The developed microfluidic device offers a rapid and efficient method for immobilizing large numbers of C. elegans.
• This technology facilitates high-throughput analysis, paving the way for large-scale studies of C. elegans physiology and behavior.
• The non-invasive nature of the immobilization ensures the integrity of the worms for subsequent research.