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Anatomically selective peripheral nerve ablation using intraneural ricin injection.

R G Wiley, T N Oeltmann

    Journal of Neuroscience Methods
    |July 1, 1986
    PubMed
    Summary
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    This study presents a method for selectively destroying specific sensory and motor neurons using ricin microinjection into nerve trunks. This technique offers precise anatomical lesions for various neuroscience research applications.

    Area of Science:

    • Neuroscience
    • Neuroanatomy
    • Toxicology

    Background:

    • Selective neuronal ablation is crucial for neuroscience research.
    • Existing methods may lack precision or anatomical specificity.
    • Ricin is a toxic lectin with potential for targeted neuronal destruction.

    Purpose of the Study:

    • To develop and validate a reliable procedure for anatomically selective neuronal lesions.
    • To utilize intraneural pressure microinjection of ricin for targeted neuron destruction.
    • To assess the efficacy and specificity of ricin-induced lesions in various nerves.

    Main Methods:

    • Intraneural pressure microinjection of the toxic lectin, ricin, into specific nerve trunks.
    • Axonal uptake and retrograde transport of ricin to neuronal perikarya.

    Related Experiment Videos

  • Administration of ricin into the vagus, hypoglossal, phrenic, sciatic nerves, and superior cervical ganglion.

    • Main Results:

    • Consistent and complete lesions restricted to targeted sensory and motor neurons were achieved.
    • Vagal nerve ablation required ≤100 ng of ricin, while hypoglossal and sciatic nerves required 1-3 µg.
    • Neuronal death occurred within 24 hours, with complete disappearance by 10-14 days post-injection.

    Conclusions:

    • Intraneural pressure microinjection of ricin provides a reliable method for selective neuronal lesions.
    • This technique allows for precise anatomical targeting of specific sensory and motor neurons.
    • The method is valuable for anatomical, neurochemical, and neurophysiological experimental designs.