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Related Experiment Videos

Insulin as a weapon.

Samuel D Robinson1, Helena Safavi-Hemami2

  • 1Department of Biology, University of Utah, Salt Lake City, UT 84112, USA.

Toxicon : Official Journal of the International Society on Toxinology
|November 5, 2016
PubMed
Summary
This summary is machine-generated.

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Marine snails of the genus Conus use insulin overdose as a weapon to capture prey. This discovery reveals a novel predatory mechanism in these venomous marine animals, distinct from human therapeutic uses of insulin.

Area of Science:

  • Marine Biology
  • Biochemistry
  • Evolutionary Biology

Background:

  • Insulin is a vital hormone for glucose regulation, famously used to treat diabetes.
  • Insulin overdose can have potent physiological effects, historically exploited for various purposes.
  • The genus Conus comprises venomous marine snails known for their complex venom cocktails.

Purpose of the Study:

  • To investigate the biochemical composition and functional role of venom from specific Conus snail species.
  • To determine if insulin or insulin-like compounds are present in Conus venom.
  • To elucidate the mechanism by which Conus snails utilize their venom for prey capture.

Main Methods:

  • Venom extraction and proteomic analysis of Conus snail venom.
  • Biochemical assays to identify and characterize insulin-like peptides.
Keywords:
Hypoglycemic shockInsulinInsulin shockPredationVenom

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  • In vivo and in vitro experiments to assess the physiological effects of the identified peptides on prey organisms.

    • Main Results:

    • Discovery of insulin-like peptides within the venom of certain Conus species.
    • Demonstration that these peptides induce rapid hypoglycemia and paralysis in prey.
    • Confirmation that Conus snails employ insulin overdose as a predatory strategy.

    Conclusions:

    • Certain Conus snails have evolved to harness the potent effects of insulin overdose for prey capture.
    • This represents a unique evolutionary adaptation of a well-known metabolic hormone into a predatory weapon.
    • The findings expand our understanding of venom evolution and the diverse roles of hormones in nature.