Long-term time-lapse microscopy of C. elegans post-embryonic development.

Area of Science:

• Developmental Biology
• Cell Biology
• Microscopy Techniques

Background:

• Studying post-embryonic development in Caenorhabditis elegans is difficult due to larval motility.
• Immobilizing larvae for microscopy often causes developmental arrest, limiting observation periods.
• Existing methods struggle to track cellular dynamics in actively developing and feeding nematodes.

Purpose of the Study:

• To develop a novel microscopy technique for long-term, single-cell resolution imaging of Caenorhabditis elegans larvae.
• To enable the study of cellular processes like division and migration in freely moving and feeding animals.
• To overcome the limitations of immobilization and high motility in C. elegans developmental studies.

Main Methods:

• Confining larvae in microchambers with bacteria as a food source.
• Utilizing fast image acquisition and advanced image analysis for tracking.
• Performing parallel fluorescence microscopy on multiple animals with 20-minute time resolution.

Main Results:

• Successfully enabled long-term time-lapse microscopy of moving and feeding Caenorhabditis elegans larvae.
• Monitored cell division, cell migration, and gene expression dynamics over approximately 48 hours of development.
• Achieved single-cell resolution in individual larvae within microchambers.

Conclusions:

• The presented microscopy technique allows for unprecedented observation of cellular dynamics in developing Caenorhabditis elegans.
• This method facilitates the study of cell behavior within a living, feeding, and growing organism.
• Opens new avenues for understanding developmental processes at the cellular level in vivo.