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Related Experiment Videos

On Trk for retrograde signaling.

F D Miller1, D R Kaplan

  • 1Center for Neuronal Survival and Brain Tumor Research Center, Montreal Neurological Institute, McGill University, 3801 rue University, H3A 2B4, Montreal, Quebec, Canada. freda.miller@mcgill.ca

Neuron
|December 12, 2001
PubMed
Summary

Target-derived neurotrophins like nerve growth factor (NGF) activate Trk receptors, initiating local and distant effects. Recent findings suggest activated Trk receptors themselves form the key retrograde signal for neuronal survival and gene expression.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Signaling

Background:

  • Neurotrophins, such as nerve growth factor (NGF), are crucial for neuronal function.
  • NGF exerts its effects by binding to Trk neurotrophin receptors at nerve terminals.
  • These receptors trigger both local and long-distance retrograde signaling within neurons.

Purpose of the Study:

  • To elucidate the nature of the mysterious retrograde signal initiated by NGF.
  • To investigate the role of activated Trk receptors in retrograde signaling.
  • To understand how NGF signaling supports neuronal survival and gene expression.

Main Methods:

  • Analysis of neurotrophin-receptor interactions.
  • Investigation of signaling pathways in neuronal terminals and cell bodies.

Related Experiment Videos

  • Studies on retrograde transport mechanisms.

    • Main Results:

    • Activated Trk receptors are identified as the primary retrograde signal.
    • Evidence suggests differential Trk signaling at nerve terminals versus cell bodies.
    • NGF, via activated Trk, promotes local growth and retrograde survival/gene expression.

    Conclusions:

    • Activated Trk receptors are the key retrograde signal for neuronal survival and gene expression.
    • Distinct signaling properties of Trk at terminals and cell bodies enable localized and retrograde effects.
    • NGF utilizes activated Trk to coordinate local and distant neuronal functions.