Actin cytoskeleton regulation in neuronal morphogenesis and structural plasticity.

Area of Science:

• Neuroscience
• Cell Biology
• Molecular Biology

Background:

• The actin cytoskeleton is essential for neuronal structure and function.
• Actin and myosin dynamics are critical for neuronal development and plasticity.
• Understanding these dynamics is key to comprehending neuronal morphology.

Purpose of the Study:

• To review the diverse roles of actin and myosin in neuronal morphogenesis.
• To highlight the regulatory functions of Rho GTPases in neuronal development.
• To synthesize current evidence on signaling pathways governing neuronal structural changes.

Main Methods:

• Literature review of studies on actin, myosin, and Rho GTPases in neurons.
• Analysis of research on axon and dendrite development, synapse formation, and retraction.
• Synthesis of findings on signaling pathways regulating cytoskeletal dynamics.

Main Results:

• Actin and myosin are involved in axon initiation, growth, guidance, branching, and retraction.
• These proteins also play critical roles in dendrite and dendritic spine morphogenesis.
• Synapse formation and stability are significantly influenced by actin-myosin interactions.
• Rho family GTPases are identified as key regulators of actin polymerization and myosin function.
• Evidence points to common signaling pathways, particularly Rho GTPases, underlying various aspects of neuronal morphogenesis.

Conclusions:

• Actin and myosin perform multifaceted roles throughout neuronal development and in adult neurons.
• Rho GTPases are central regulators of actin and myosin, orchestrating diverse morphogenetic processes.
• Neuronal morphogenesis relies on the coordinated regulation of common signaling pathways, with Rho GTPases playing a pivotal role.