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Related Experiment Videos

Alpha-flupenthixol-induced hyperactivity by chronic dosing in rats

B J Sahakian, T W Robbins, S D Iversen

    European Journal of Pharmacology
    |May 1, 1976
    PubMed
    Summary

    Chronic alpha-flupenthixol treatment increased locomotor activity and stereotyped behaviors in rats, suggesting behavioral supersensitivity. Apomorphine treatment did not yield similar effects, highlighting drug-specific impacts on rat behavior.

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    Area of Science:

    • Neuroscience
    • Pharmacology
    • Animal Behavior

    Background:

    • Dopamine receptor antagonists like alpha-flupenthixol are used clinically.
    • Understanding drug effects on behavior is crucial for therapeutic development.
    • Rats' rearing conditions (social vs. isolation) can influence behavioral responses to drugs.

    Purpose of the Study:

    • To investigate the effects of chronic alpha-flupenthixol and apomorphine on locomotor activity and stereotyped behaviors in rats.
    • To explore the role of rearing conditions in mediating these drug-induced behavioral changes.
    • To examine the potential for 'behavioral supersensitivity' following chronic drug administration.

    Main Methods:

    • Rats were reared under social or isolation conditions.
    • Chronic administration of alpha-flupenthixol or apomorphine was administered from weaning.

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  • Spontaneous locomotor activity and stereotyped behaviors induced by d-amphetamine or apomorphine were measured.

    • Main Results:

    • Chronic alpha-flupenthixol increased spontaneous locomotor activity in both rearing conditions.
    • Alpha-flupenthixol enhanced amphetamine- and apomorphine-induced stereotypy in socially reared rats.
    • Spontaneous stereotypies were observed in alpha-flupenthixol-treated rats.
    • Chronic apomorphine did not significantly alter locomotor activity or stereotyped behaviors.

    Conclusions:

    • Chronic alpha-flupenthixol induces behavioral changes consistent with dopamine receptor supersensitivity.
    • Apomorphine's lack of effect suggests differential mechanisms or receptor interactions.
    • Rearing environment may modulate behavioral responses to dopaminergic drugs.