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The opiate system in invertebrates

L M Harrison1, A J Kastin, J T Weber

  • 1VA Medical Center, Research Service (151), New Orleans, LA 70146.

Peptides
|January 1, 1994
PubMed
Summary
This summary is machine-generated.

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Many species share signaling systems. Invertebrates possess opiate-like molecules and receptors, suggesting conserved communication pathways across diverse life forms, though genetic evidence is still needed.

Area of Science:

  • Comparative endocrinology
  • Evolutionary biology
  • Molecular signaling

Background:

  • Cellular communication often involves soluble messengers binding to receptors.
  • The evolutionary origins and cross-species conservation of these signaling components, particularly hormones and receptors, remain largely unexplored.
  • Opiate-like peptides and binding sites have been identified in invertebrates, hinting at conserved signaling mechanisms.

Purpose of the Study:

  • To investigate the evolutionary conservation of signaling systems between invertebrates and vertebrates.
  • To explore whether invertebrates utilize the same hormones and receptors as vertebrates.
  • To assess the phylogenetic origins of signal systems.

Main Methods:

  • Literature review of studies on invertebrate and vertebrate signaling pathways.

Related Experiment Videos

  • Analysis of existing data on opiate-like peptides and binding sites in diverse invertebrate species.
  • Comparative analysis of molecular communication modes across different taxa.

    • Main Results:

    • Invertebrates, from unicellular organisms to insects, exhibit opiate-like peptides and binding sites.
    • Biological responses to opiates have been observed in various invertebrate species.
    • Critical genetic data confirming the homology of these systems between invertebrates and vertebrates are currently lacking.

    Conclusions:

    • The presence of opiate-like molecules and receptors in invertebrates suggests a potentially conserved signaling system across a wide phylogenetic range.
    • Further genetic research is required to confirm the evolutionary relatedness of these signaling components.
    • It is hypothesized that existing signal molecules may have driven the evolution of their own receptors from membrane proteins.