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Related Experiment Videos

Nerve growth factor in neuronal development and maintenance.

T P Misko1, M J Radeke, E M Shooter

  • 1Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305.

The Journal of Experimental Biology
|September 1, 1987
PubMed
Summary

Nerve growth factor (NGF) supports neuron survival by binding to receptors on nerve terminals. Lower affinity NGF receptors may convert to higher affinity forms, mediating crucial cell signaling pathways.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Biology

Background:

  • Nerve growth factor (NGF) is crucial for the survival of developing sympathetic and sensory neurons.
  • NGF functions by retrograde transport from target tissues to neuronal cell bodies.
  • Signal transduction initiated by NGF binding to its receptors triggers neuronal survival pathways.

Purpose of the Study:

  • To elucidate the mechanisms underlying NGF-mediated neuronal survival.
  • To characterize the different types of NGF receptors and their roles.
  • To investigate the structural properties and potential interconversion of NGF receptors.

Main Methods:

  • Analysis of NGF receptor affinity and molecular mass.
  • Investigation of receptor behavior under trypsin treatment.

Related Experiment Videos

  • Gene transfer and cloning to determine receptor structure.
  • Studies on receptor clustering and its effects.

    • Main Results:

    • Two populations of NGF receptors exist: high-affinity (approx. 145,000 Da, trypsin-resistant) and low-affinity (approx. 85,000 Da, trypsin-sensitive).
    • Clustering of low-affinity receptors mimics high-affinity receptor characteristics, suggesting interconversion.
    • The low-affinity NGF receptor is a heavily glycosylated protein with specific structural domains.

    Conclusions:

    • NGF's survival function is mediated by high-affinity receptors, likely involving a complex of the low-affinity receptor protein and another protein.
    • Receptor interconversion may be a key mechanism in NGF signal transduction.
    • Understanding NGF receptor structure and function is vital for neurotrophic factor research.