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Neuropeptide function: the invertebrate contribution.

M O'Shea, M Schaffer

    Annual Review of Neuroscience
    |January 1, 1985
    PubMed
    Summary
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    Invertebrate peptides, structurally diverse, exhibit multiple functions and varied mechanisms, including co-localization and complex inactivation processes. These neuropeptides significantly control muscle contraction and oscillatory functions across species.

    Area of Science:

    • Neuroendocrinology
    • Comparative Physiology
    • Molecular Biology

    Background:

    • Invertebrate peptides are crucial signaling molecules with diverse physiological roles.
    • Understanding their structure-function relationships and evolutionary origins is key.
    • Existing knowledge highlights their involvement in various biological processes.

    Purpose of the Study:

    • To generalize the functions and mechanisms of invertebrate peptides.
    • To explore structural classifications and evolutionary implications.
    • To elucidate their roles in muscle contraction and oscillatory functions.

    Main Methods:

    • Comparative analysis of known invertebrate peptide functions.
    • Classification based on structural similarities and evolutionary homology.

    Related Experiment Videos

  • Examination of molecular mechanisms and inactivation processes.
  • Investigation of co-localization with other neuroeffectors.

    • Main Results:

    • Invertebrate peptides can be classified into structurally related groups, suggesting homology or convergent evolution.
    • Neuropeptides exhibit pleiotropy, with single peptides having multiple functions (e.g., proctolin).
    • Mechanisms of action vary; some involve second messengers (cAMP), while others do not.
    • Peptide inactivation is complex, involving proteolysis that can enhance or diminish bioactivity.
    • Neuropeptides are frequently co-localized with other transmitters and play roles in muscle contraction and rhythmic functions.

    Conclusions:

    • Invertebrate peptides represent a diverse signaling system with complex regulatory roles.
    • Structural similarities may arise from evolutionary homology or functional adaptation.
    • Their mechanisms of action, inactivation, and co-localization highlight sophisticated signaling pathways.
    • These peptides are fundamental in controlling muscle activity and physiological rhythms.