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Related Experiment Videos

Dopamine-norepinephrine interaction in hyperactive boys treated with d-amphetamine

W O Shekim, H Dekirmenjian, J Javaid

    The Journal of Pediatrics
    |May 1, 1982
    PubMed
    Summary

    This study found that the relationship between norepinephrine and dopamine metabolites differs in hyperactive boys compared to controls. D-amphetamine treatment normalized this relationship in hyperactive children.

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    Area of Science:

    • Neuroscience
    • Biochemistry
    • Pediatrics

    Background:

    • Hyperactivity in children is linked to neurotransmitter imbalances.
    • Norepinephrine (NE) and Dopamine (DA) are key central nervous system neurotransmitters.
    • Urinary metabolites 3-methoxy-4-hydroxyphenylglycol (MHPG) and homovanillic acid (HVA) reflect NE and DA activity, respectively.

    Purpose of the Study:

    • To investigate the relationship between MHPG and HVA excretion in hyperactive boys versus controls.
    • To examine the effect of d-amphetamine on this relationship.
    • To explore potential alterations in central NE and DA activity in childhood hyperactivity.

    Main Methods:

    • Measured urinary MHPG and HVA excretion in 16 hyperactive boys and 10 controls.
    • Administered d-amphetamine (0.5 mg/kg/day for two weeks) to participants.

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  • Analyzed correlations between MHPG and HVA, controlling for age, body surface, and urinary creatinine.

    • Main Results:

    • A significant negative correlation between MHPG and HVA was found in hyperactive boys, contrasting with a positive correlation in controls.
    • Baseline correlations in hyperactive boys and responders differed significantly from post-treatment values.
    • Post-treatment correlations in hyperactive boys matched those of controls.

    Conclusions:

    • Suggests an altered relationship between dopamine and norepinephrine activity in hyperactive children.
    • D-amphetamine treatment appears to normalize the NE-DA metabolic relationship in hyperactive individuals.
    • Further research is needed to fully elucidate the contribution of central neurotransmitter metabolism to urinary MHPG and HVA levels.