The Value of Venom
Over 200,000 animal species, such as this prairie rattlesnake (Crotalus viridis), produce venom. Photo: Joe McDonald/Getty Images
Venomous reptiles, bugs and marine life have notorious reputations as dangerous, sometimes life-threatening creatures. But, a recent paper published in Science details how technology and a growing understanding of the evolution of venoms are pointing the way toward entirely new classes of drugs capable of treating diabetes, autoimmune diseases, chronic pain, and other conditions.
According to Holford and her colleagues, venomous species account for more than 15 percent of the Earth’s documented biodiversity, and they can be found in virtually all marine and terrestrial habitats.
Still, researchers have studied very few venoms because until recently they lacked the appropriate technology for analyzing the tiny amounts of venom that can be extracted from these mostly small species.
But innovations in omics (technologies that map the roles, relationships, and actions of an organism’s molecular structure) are allowing researchers to uncover evolutionary changes and diversification among specific venomous species that could prove useful in developing new drugs capable of precisely targeting and binding to molecules that are active in certain human diseases.
“Knowing more about the evolutionary history of venomous species can help us make more targeted decisions about the potential use of venom compounds in treating illnesses,” said Holford. “New environments, the development of venom resistance in its prey, and other factors can cause a species to evolve in order to survive. These changes can produce novel compounds — some of which may prove extremely useful in drug development.”
Conus tulipa eating a fish. This cone snail can eat schools of fish by engulfing them in its mouth and then harpooning them with venom. Credit: The Graduate Centre, City University of New York
To date, only six Food and Drug Administration-approved, venom-derived drugs have been developed as a result of modern-day research, but Holford and her colleagues believe greater investment in venom research could yield therapies for currently untreatable diseases as well as improved therapeutic options.
Potential drug advances include therapeutic peptides derived from the venomous sea anemone, which researchers believe could treat autoimmune diseases; therapeutic neurotoxins derived from the Conus magus, which scientists think could provide non-addictive treatment of chronic pain; chlorotoxin from the deathstalker scorpion, which could be the basis for a surgical tumor-imaging technique; and spider toxins, which could yield ecofriendly insecticides.
Holford and her follow authors conclude that an evolution-informed perspective will help focus venom research so that it can leverage the extraordinary biochemical warfare created by nature to yield transformative therapeutics and bio-insecticides.
This article has been republished from materials provided by The City University of New York. Note: material may have been edited for length and content. For further information, please contact the cited source.
Holford, M., Daly, M., King, G. F., & Norton, R. S. (2018). Venoms to the rescue. Science, 361(6405), 842-844. doi:10.1126/science.aau7761