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Modeling Axonal Degeneration Using Motor Nerve Organoids.

Siu Yu A Chow1,2, Yui Nakanishi1,2, Shohei Kaneda1,3

  • 1Institute of Industrial Science, The University of Tokyo, Tokyo, Japan.

Methods in Molecular Biology (Clifton, N.J.)
|July 1, 2022
PubMed
Summary

Researchers developed a novel in vitro model using motor nerve organoids to study axon degeneration in diseases like ALS. This system allows rapid induction of damage and testing of neuroprotective compounds for drug discovery.

Keywords:
Axonal degenerationInduced pluripotent stem (iPS) cellMicrofluidic deviceMotor neuronNeurodegenerative diseaseOrgan-on-a-chipOrganoid

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Area of Science:

  • Neuroscience
  • Stem Cell Biology
  • Drug Discovery

Background:

  • Axon degeneration is a hallmark of neurodegenerative diseases such as amyotrophic lateral sclerosis (ALS).
  • Existing in vitro models fail to adequately replicate nerve and axonal tract damage, hindering therapeutic development.
  • Effective treatments for diseases characterized by axon degeneration are lacking.

Purpose of the Study:

  • To establish a novel in vitro model for studying motor neuron axon degeneration.
  • To enable rapid induction of axon damage in a controlled experimental setting.
  • To facilitate the screening of potential neuroprotective compounds.

Main Methods:

  • Generation of motor nerve organoids from human induced pluripotent stem cells.
  • Induction of rapid motor neuron axon degeneration using chemical agents.
  • Assessment of neuroprotective effects of compounds on damaged axons.

Main Results:

  • Successful creation of a functional motor neuron axon bundle degeneration model.
  • Demonstration of rapid and reproducible induction of axon damage.
  • Validation of the model for evaluating the efficacy of neuroprotective agents.

Conclusions:

  • The developed motor neuron axon bundle degeneration model offers a valuable tool for ALS and related diseases.
  • This in vitro system can accelerate the screening and development of drugs targeting axonopathies.
  • The model provides a platform for understanding mechanisms of axon degeneration and identifying therapeutic targets.