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Correlative relationship between biochemical activity and aggressive behaviour.

B A Davis, P H Yu, A A Boulton

    Progress in Neuro-Psychopharmacology & Biological Psychiatry
    |January 1, 1983
    PubMed
    Summary
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    Violent offenders showed lower levels of certain biogenic trace amines and reduced platelet monoamine oxidase (MAO) activity. These biochemical differences, particularly MAO activity with tryptamine (TRYP), were observed in incarcerated individuals.

    Area of Science:

    • Neuroscience
    • Forensic Psychology
    • Biochemistry

    Background:

    • Biogenic trace amines and their metabolites are implicated in various neurological processes.
    • Previous research suggests potential links between neurochemical imbalances and aggressive behavior.

    Purpose of the Study:

    • To investigate the relationship between biogenic trace amines and histories of violence in incarcerated offenders.
    • To assess plasma levels of trace acids and platelet monoamine oxidase (MAO) activity in relation to violent behavior.

    Main Methods:

    • Assessed plasma levels of unconjugated and conjugated trace acids (PAA, mHPA, pHPA).
    • Measured platelet MAO activity using specific substrates (PE, TRYP, TA).
    • Employed factor analysis for biochemical activity scores and correlated with violence history and prison disturbance scales.

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    Main Results:

    • Violent offenders exhibited lower levels of conjugated phenylacetic acid (PAA(C)) and unconjugated p-hydroxyphenylacetic acid (pHPA (U)).
    • Lower MAO activity towards tryptamine (TRYP) was observed in violent offenders.
    • Factor scores for biochemical activity showed significant correlations, though cross-validation with a pilot study yielded minimal relationships.

    Conclusions:

    • Findings suggest potential biochemical differences, including trace amine levels and MAO activity, associated with violent offending in incarcerated populations.
    • While significant correlations were found, the limited cross-validation highlights the need for further research to confirm these associations.