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My brain told me to do it.

Jennifer H Kong1, Samantha J Butler, Bennett G Novitch

  • 1Department of Neurobiology, David Geffen School of Medicine at UCLA, 610 Charles Young Drive East, Los Angeles, CA 90095, USA.

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|June 15, 2013
PubMed
Summary
This summary is machine-generated.

Brain and spinal cord circuits develop together for motor control. Zebrafish studies show dopamine signaling regulates motor neuron formation by adjusting progenitor cell responses to Shh signaling.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • Voluntary motor control relies on the coordinated development of central and spinal neural circuits.
  • Understanding the molecular mechanisms coordinating this development is crucial for addressing neurological disorders.

Purpose of the Study:

  • To investigate the molecular signaling pathways that coordinate brain and spinal cord development for motor control.
  • To elucidate the role of descending brain projections in modulating spinal motor neuron development.

Main Methods:

  • Utilized zebrafish as a model organism for studying neural development.
  • Employed genetic and pharmacological approaches to manipulate dopamine signaling and Shh pathway activity.
  • Analyzed the impact of these manipulations on motor neuron progenitor proliferation and differentiation.

Main Results:

  • Demonstrated that dopamine released from descending brain projections plays a key role in coordinating motor circuit development.
  • Showed that dopamine modulates the response of motor neuron progenitors to Sonic hedgehog (Shh) signaling.
  • Found that this modulation involves the attenuation of Shh signaling, thereby regulating progenitor behavior.

Conclusions:

  • Dopamine signaling acts as a crucial coordinator between descending brain pathways and spinal motor circuitry development.
  • The interplay between dopamine and Shh signaling provides a molecular mechanism for ensuring synchronous development of motor control circuits.
  • These findings offer insights into potential therapeutic targets for developmental motor disorders.