Tissue polarity and PCP protein function: C. elegans as an emerging model.

Area of Science:

• Developmental Biology
• Cell Biology
• Genetics

Background:

• Cell polarity is fundamental for cell diversity, tissue organization, morphogenesis, and function.
• While PAR-proteins are well-studied in Caenorhabditis elegans, mechanisms of epithelial cell polarization are clearer in other systems.
• Wnt-signaling organizes tissue polarity in C. elegans, sharing similarities with the Wnt/planar cell polarity (PCP) pathway but lacking core PCP protein functions.

Purpose of the Study:

• To review recent insights into cell polarization mechanisms in C. elegans.
• To highlight the role of conserved PCP proteins in directed cell migration within C. elegans.
• To discuss the utility of C. elegans as a model system for studying planar cell polarity.

Main Methods:

• Literature review of studies on cell polarity and PCP in C. elegans.
• Analysis of conserved PCP protein functions in C. elegans developmental processes.
• Comparison of Wnt-signaling and PCP pathways in different model organisms.

Main Results:

• Conserved PCP proteins, despite differences from canonical PCP pathways, regulate key cell migratory events in C. elegans.
• These events include convergent extension movements and neurite formation and guidance.
• C. elegans serves as a valuable model for understanding PCP, particularly in the context of Wnt-signaling.

Conclusions:

• The study underscores the conserved roles of PCP proteins in regulating cell migration and tissue organization.
• C. elegans provides a unique system to investigate PCP mechanisms beyond canonical pathways.
• Further research in C. elegans can elucidate fundamental principles of planar cell polarity relevant to broader biological systems.