Does planar cell polarity signaling steer growth cones?

Area of Science:

• Neuroscience
• Cell Biology

Background:

• Axon guidance is crucial for neural circuit formation.
• The precise signaling mechanisms directing axon growth remain largely unknown.
• Planar cell polarity (PCP) signaling is increasingly recognized for its role in axon guidance.

Purpose of the Study:

• To review the potential reuse of conserved cell polarity signaling pathways in growth cones.
• To elucidate the mechanisms underlying asymmetric signaling during axon growth.
• To connect insights from growth cone guidance to general principles of cell polarity.

Main Methods:

• Literature review of recent studies on planar cell polarity and axon guidance.
• Analysis of conserved cell polarity signaling pathways.
• Discussion of potential mechanisms for asymmetric signaling in growth cones.

Main Results:

• Planar cell polarity signaling is established as a factor in axon guidance.
• Conserved cell polarity pathways are likely reused to convey asymmetric signals in growth cones.
• Growth cone insights can inform general cell polarity signaling principles.

Conclusions:

• Cell polarity signaling offers a framework for understanding directional axon growth.
• This mechanism may be a general principle for directional control by various axon guidance molecules.
• Further research into PCP signaling in growth cones is warranted.