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Updated: Jun 20, 2026
11:56
Visualization of the Axonal Projection Pattern of Embryonic Motor Neurons in Drosophila
Published on: June 16, 2017
Emerging mechanisms in morphogen-mediated axon guidance
Cristina Sánchez-Camacho1, Paola Bovolenta
1Departamento de Neurobiología Molecular, Celular y del Desarrollo, Instituto Cajal, CSIC and CIBER de Enfermedades Raras (CIBERER), Madrid, Spain.
Summary
Morphogens like Sonic hedgehog (Shh), Wnt, and TGFbeta/Bmp signaling pathways are crucial for neural circuit assembly. This review explores how these pathways adapt to regulate neuronal development and function.
Area of Science:
- Developmental Biology
- Neuroscience
- Molecular Biology
Background:
- Secreted morphogens (Sonic hedgehog (Shh), Wnt, TGFbeta/Bmp) control cell fate and proliferation during early development.
- These morphogens are conserved in neural circuit assembly, regulating neuronal polarization, axon/dendrite growth, and synaptogenesis.
- Neuronal development requires rapid, localized changes in cytoskeleton and plasma membrane.
Purpose of the Study:
- To investigate if morphogen signaling at the growth cone utilizes similar mechanisms as in cell specification.
- To review recent advances in understanding morphogen roles in neuronal circuit formation.
Main Methods:
- Literature review of studies on morphogen signaling in development and neuroscience.
- Analysis of molecular mechanisms and intracellular pathways involved.
Main Results:
- Morphogen signaling pathways (Shh, Wnt, TGFbeta/Bmp) are adapted for neuronal development.
- Novel molecular mechanisms are employed by these pathways to influence neural circuit formation.
- Evidence suggests shared and distinct pathway components between cell specification and neuronal development.
Conclusions:
- Morphogens play a critical, conserved role in assembling functional neural circuits.
- Understanding these adapted pathways offers insights into neural development and potential therapeutic targets.
- Further research is needed to fully elucidate the specific mechanisms of morphogen action at the growth cone.
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