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Updated: Aug 7, 2025
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Retrograde Neuroanatomical Tracing of Phrenic Motor Neurons in Mice
Published on: February 22, 2018
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Catenin signaling controls phrenic motor neuron development and function during a narrow temporal window.
Alicia N Vagnozzi1, Matthew T Moore1, Raquel López de Boer1
1Department of Neurosciences, Case Western Reserve University, Cleveland, OH, United States.
Frontiers in Neural Circuits
|March 10, 2023
Summary
Catenin signaling is crucial for the development of phrenic motor column (PMC) neurons, essential for breathing. Its absence causes severe developmental defects and perinatal lethality in mice.
Area of Science:
- Neuroscience
- Developmental Biology
- Cell Adhesion
Background:
- Phrenic motor column (PMC) neurons innervate the diaphragm, crucial for respiration.
- Mechanisms governing phrenic motor neuron development and function remain incompletely understood.
Purpose of the Study:
- To investigate the role of catenin-mediated cadherin adhesion in phrenic motor neuron development and function.
Main Methods:
- Genetic deletion of β- and γ-catenin in motor neuron progenitors.
- Analysis of phrenic motor neuron survival, activity, topography, and axonal/dendritic growth.
Main Results:
- Deletion of catenins in motor neuron progenitors led to perinatal lethality and reduced phrenic motor neuron bursting activity.
- Absence of catenin signaling disrupted phrenic motor neuron topography, clustering, and neurite outgrowth.
- Catenins were dispensable for maintaining phrenic motor neuron topography and function in postmitotic neurons.
Conclusions:
- Catenins play a fundamental role in phrenic motor column development.
- Distinct mechanisms likely regulate phrenic motor neuron maintenance versus development.
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