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Opioid modulation of appetite.

J E Morley, A S Levine, G K Yim

    Neuroscience and Biobehavioral Reviews
    |January 1, 1983
    PubMed
    Summary
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    Opioid peptides in the brain regulate feeding behaviors and act as a link to the reward system. Their role in species preservation may explain variations in feeding responses across different species.

    Area of Science:

    • Neuroscience
    • Behavioral Biology
    • Endocrinology

    Background:

    • The discovery of opiate receptors and endogenous opioid peptides in the central nervous system has prompted research into their physiological roles.
    • Opioid peptides are implicated in various functions, necessitating a deeper understanding of their specific contributions.

    Purpose of the Study:

    • To review evidence supporting the role of opioid peptides in regulating ingestive behavior.
    • To propose a hypothesis where opioid peptides act as tonic inducers of feeding, modulated by other neurochemicals.
    • To explore the connection between the reward system, feeding behaviors, and opioid peptides.

    Main Methods:

    • Literature review of existing research on opioid peptides and ingestive behavior.
    • Analysis of evidence linking opioid peptides to the brain's reward system.

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  • Examination of teleological perspectives on opioid peptide function in species preservation.

    • Main Results:

    • Opioid peptides appear to play a significant role in regulating feeding behaviors across species.
    • A hypothesis is presented suggesting opioid peptides as tonic inducers of feeding, counterbalanced by neuropeptides and monoamines.
    • Opioid peptides are central mediators of the reward system, linking reward to feeding.

    Conclusions:

    • Opioid peptides are crucial regulators of ingestive behavior and are linked to the reward system.
    • A teleological role in species preservation may explain species-specific variations in opioid peptide influence on feeding.
    • Animal feeding profiles and nutrient interactions are key to understanding opiate-sensitive feeding systems.