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Plasma immunoreactive beta-endorphin in bulimics.

D T Fullerton, W J Swift, C J Getto

    Psychological Medicine
    |February 1, 1986
    PubMed
    Summary
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    Bulimic patients exhibit elevated plasma beta-endorphin levels, independent of glucose intake. This sustained endorphin surge may be stress-induced, potentially fueling the binge-vomiting cycle in bulimia nervosa.

    Area of Science:

    • Neuroendocrinology
    • Eating Disorders

    Background:

    • Bulimia nervosa is an eating disorder characterized by binge-eating and compensatory behaviors.
    • Endogenous opioids, such as beta-endorphin, are implicated in reward and stress pathways.

    Purpose of the Study:

    • To investigate the plasma beta-endorphin response to glucose ingestion in individuals with bulimia nervosa compared to healthy controls.
    • To explore the potential role of elevated beta-endorphin in the pathophysiology of bulimia nervosa.

    Main Methods:

    • A comparative study involving 8 individuals with bulimia nervosa and 8 healthy controls.
    • Measurement of plasma beta-endorphin levels over a 5-hour period following glucose ingestion.

    Main Results:

    • Bulimic participants showed a sustained elevation in plasma beta-endorphin levels throughout the 5-hour study.

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  • This elevation was not correlated with glucose ingestion in the bulimic group.

    • Conclusions:

    • Sustained elevation of plasma beta-endorphin in bulimia nervosa may be a stress response.
    • This elevated beta-endorphin could contribute to the maintenance of the binge-vomiting cycle.