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Related Experiment Videos

Choline excites cortical neurons.

K Krnjević, W Reinhardt

    Science (New York, N.Y.)
    |December 14, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Choline directly excites feline cerebral cortex neurons, similar to acetylcholine. This direct action, unaffected by choline uptake blockers, suggests a role in therapeutic benefits.

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    Area of Science:

    • Neuroscience
    • Pharmacology

    Background:

    • Acetylcholine is a key neurotransmitter in the central nervous system.
    • Choline's therapeutic effects are not fully understood.
    • Investigating choline's direct neuronal actions is crucial.

    Purpose of the Study:

    • To determine if choline directly excites feline cerebral cortex neurons.
    • To elucidate the mechanism of choline's action on cortical neurons.

    Main Methods:

    • Iontophoretic application of choline and acetylcholine in feline cerebral cortex.
    • Administration of atropine, hemicholinium-3, and triethylcholine.
    • Assessment of neuronal firing in the sensorimotor region.

    Main Results:

    • Choline evoked neuronal firing, 8 times weaker than acetylcholine.

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  • Atropine suppressed choline's action.
  • Choline uptake blockers did not inhibit choline's effect.
  • Anticholinesterase (physostigmine) did not potentiate choline's action.

    • Conclusions:

    • Choline directly excites cortical neurons in cats.
    • This direct action is likely a significant factor in choline's therapeutic efficacy.
    • The mechanism involves muscarinic receptors, not choline uptake or acetylcholinesterase inhibition.