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Steroids in aquatic invertebrates.

René Lafont1, Michel Mathieu

  • 1Biochimie Structurale et Fonctionnelle des Protéines, CNRS FRE 2852, Université Pierre et Marie Curie, Case Courrier no. 29, 75252 Paris Cedex 05, France. rene.lafont@upmc.fr

Ecotoxicology (London, England)
|January 24, 2007
PubMed
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Invertebrates utilize steroid molecules for various functions, including hormonal roles and chemical defense. Understanding these roles is crucial due to increasing endocrine disruption from pollutants.

Area of Science:

  • Endocrinology
  • Invertebrate Biology
  • Environmental Science

Background:

  • Steroid molecules are vital in invertebrates, serving hormonal roles (e.g., ecdysteroids in arthropods) and other functions like chemical communication and defense.
  • Environmental pollutants can cause endocrine disruption, impacting reproductive physiology in both vertebrates and invertebrates, necessitating a deeper understanding of invertebrate endocrine systems.

Purpose of the Study:

  • To investigate the diverse endocrine roles of steroids in invertebrates, focusing on arthropods and molluscs.
  • To determine if steroids fulfill similar functions across different invertebrate phyla.
  • To identify endogenous steroids, their origins, and mechanisms of action in invertebrates.

Main Methods:

  • Leveraging genome sequencing programs to identify invertebrate receptors and biosynthetic enzymes related to vertebrate counterparts.

Related Experiment Videos

  • Investigating the complexities of steroid signaling, exemplified by estrogen receptors in molluscs.

    • Main Results:

    • Steroids play multifaceted roles beyond hormones in invertebrates, including chemical signaling, defense, and digestive processes.
    • Research is actively identifying specific steroids, their endogenous or exogenous origins, and their mechanisms of action.
    • Genomic approaches aid in identifying potential steroid-related genes, though challenges like divergent receptor evolution exist.

    Conclusions:

    • A comprehensive understanding of invertebrate steroid physiology is essential for addressing endocrine disruption.
    • Further research is needed to fully elucidate the diverse roles and mechanisms of steroids across invertebrate phyla.
    • Comparative genomics offers valuable insights but must account for unique evolutionary paths, such as in mollusc estrogen receptors.