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Related Experiment Videos

Alterations in dopaminergic function after subacute ethanol administration.

M J Mullin, A P Ferko

    The Journal of Pharmacology and Experimental Therapeutics
    |June 1, 1983
    PubMed
    Summary

    Subacute ethanol exposure alters dopamine release in rats, affecting their response to d-amphetamine. These changes persist even after ethanol tolerance develops, indicating long-term impacts on dopaminergic mechanisms.

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    Area of Science:

    • Neuroscience
    • Pharmacology
    • Toxicology

    Background:

    • Ethanol tolerance is associated with changes in neurotransmitter systems.
    • Dopaminergic pathways are implicated in the effects of both ethanol and amphetamines.

    Purpose of the Study:

    • To investigate the effects of subacute ethanol exposure on the in vivo and in vitro responses to d-amphetamine in rats.
    • To determine if ethanol tolerance influences dopaminergic activity and d-amphetamine's effects.

    Main Methods:

    • Rats were exposed to ethanol vapor for 24 hours.
    • In vivo hypothermic and hyperthermic responses to d-amphetamine were measured.
    • In vitro release of [3H]dopamine from striatal synaptosomes was assessed.

    Main Results:

    • Ethanol tolerance led to a decreased hypothermic response to d-amphetamine.
    • Dopamine release stimulated by d-amphetamine was significantly reduced immediately after ethanol exposure.
    • Reduced dopamine release persisted in ethanol-tolerant rats 48 hours post-exposure.

    Conclusions:

    • Subacute ethanol administration induces long-lasting alterations in d-amphetamine-sensitive dopaminergic mechanisms.
    • Functional changes in dopaminergic activity are associated with ethanol tolerance.
    • Ethanol exposure impacts dopamine release and amphetamine responsiveness.

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