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ALS - Motor Neuron Disease: Mechanism and Development of New Therapies
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Modeling Motor Neuron Resilience in ALS Using Stem Cells.

Ilary Allodi1, Jik Nijssen1, Julio Aguila Benitez1

  • 1Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden.

Stem Cell Reports
|May 14, 2019
PubMed
Summary
This summary is machine-generated.

Researchers generated oculomotor neurons in vitro, modeling their resilience to amyotrophic lateral sclerosis (ALS). These in vitro oculomotor neurons show enhanced survival signaling and resistance to excitotoxicity, aiding ALS research.

Keywords:
ALSLCM sequencingOnuf’s nucleusPhox2aRNA sequencingamyotrophic lateral sclerosisneuronal vulnerability and resistanceoculomotor neuronsspinal motor neuronsstem cells

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Area of Science:

  • Neuroscience
  • Stem Cell Biology
  • Motor Neuron Disease Research

Background:

  • Oculomotor neurons controlling eye movements are notably resistant to degeneration in amyotrophic lateral sclerosis (ALS).
  • Modeling this in vitro resilience is crucial for understanding ALS pathogenesis and developing therapies.
  • Current in vitro models often lack the specific resilience observed in vivo.

Purpose of the Study:

  • To generate functional oculomotor neurons in vitro from mouse embryonic stem cells.
  • To characterize these in vitro-generated neurons for their authenticity and resilience.
  • To establish a valuable model for studying motor neuron survival in the context of ALS.

Main Methods:

  • Temporal overexpression of PHOX2A in neuronal progenitors derived from mouse embryonic stem cells.
  • Electrophysiology, immunocytochemistry, and RNA sequencing to validate neuronal identity and function.
  • Assessment of Akt signaling pathways and resilience to kainic acid-induced excitotoxicity.

Main Results:

  • Successfully generated a high proportion of bona fide oculomotor neurons in vitro.
  • In vitro neurons exhibited cellular properties and gene expression profiles similar to in vivo counterparts.
  • Demonstrated robust activation of survival-promoting Akt signaling in these neurons.
  • Showed increased resilience to kainic acid toxicity compared to in vitro spinal motor neurons.

Conclusions:

  • Bona fide oculomotor neurons can be reliably generated in vitro from mouse embryonic stem cells.
  • These in vitro-generated oculomotor neurons recapitulate the in vivo resilience to ALS-like toxicity.
  • This model provides a powerful tool for investigating motor neuron survival mechanisms and ALS.