Imaging Epidermal Cell Rearrangement in the C. elegans Embryo.

Area of Science:

• Developmental Biology
• Cell Biology
• Microscopy Techniques

Background:

• The Caenorhabditis elegans embryo offers a simplified model for studying cell rearrangement due to its transparency, invariant lineage, and short generation time.
• Modern microscopy techniques allow for detailed analysis of morphogenetic movements during embryonic development.

Purpose of the Study:

• To provide an overview of routine microscopy techniques for imaging dorsal intercalation in C. elegans embryos.
• To detail methods for analyzing convergent extension-like movements in the embryonic epidermis.

Main Methods:

• Agar mounts preparation for C. elegans embryos.
• Low-cost four-dimensional (4D) Nomarski microscopy.
• Laser microsurgery for cellular manipulation.
• 4D fluorescence microscopy utilizing actin and junctional fusion proteins.
• Application of tissue-specific promoters for targeted gene expression.

Main Results:

• Established protocols for imaging dorsal intercalation using various microscopy techniques.
• Demonstrated the utility of fluorescent proteins and specific promoters in visualizing cellular dynamics.
• Showcased the effectiveness of laser microsurgery in perturbing and analyzing cell rearrangement.

Conclusions:

• Microscopy techniques, including 4D Nomarski and fluorescence microscopy, are effective for studying dorsal intercalation in C. elegans.
• The C. elegans embryo serves as an excellent model for dissecting the mechanisms of directed cell rearrangement.
• This chapter provides a practical guide for researchers interested in C. elegans embryogenesis and cell migration.