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Platelet 5-hydroxytryptamine accumulation in depressive illness.

A Coppen, C Swade, K Wood

    Clinica Chimica Acta; International Journal of Clinical Chemistry
    |July 1, 1978
    PubMed
    Summary
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    Platelet serotonin transporter capacity is reduced in depressed patients, indicating impaired 5-hydroxytryptamine (5-HT) transport. This finding is independent of psychiatric status and may relate to electrolyte and enzyme imbalances in depression.

    Area of Science:

    • Neuroscience
    • Biochemistry

    Background:

    • Depression is a complex mood disorder with various neurobiological underpinnings.
    • Platelets are utilized as a model system to study neuronal functions, including neurotransmitter transport.

    Purpose of the Study:

    • To investigate the kinetics of 5-hydroxytryptamine (5-HT) uptake by blood platelets in individuals with depression.
    • To determine if alterations in serotonin transport are associated with depressive illness.

    Main Methods:

    • Measured 5-hydroxytryptamine (5-HT) uptake in platelets from control subjects, acutely depressed patients, and recovered depressed patients.
    • Utilized short incubation times and low substrate concentrations to assess transport kinetics.

    Main Results:

    Related Experiment Videos

  • The affinity of serotonin for the platelet membrane transporter was found to be normal in all groups.
  • A significant impairment in the capacity of 5-HT transport was observed in depressed patients, irrespective of their current psychiatric state.

    • Conclusions:

    • The study suggests that the capacity of the platelet serotonin transporter is reduced in depression.
    • This impairment in 5-HT transport capacity may be linked to underlying electrolyte and enzyme disturbances associated with depressive illness.