For centuries, venom has held a deservedly terrifying reputation. Whether delivered by a snake, a scorpion, or the cone snail, it is a ruthlessly effective weapon. Venom consists of a cocktail of proteins and peptides designed to shut down nervous systems, collapse blood pressure, or dissolve tissue in seconds.
But venom has a medical advantage. It contains thousands of biological compounds that target specific physiological receptors. Scientists are taking advantage of their specificity to convert these deadly toxins into life-saving medications.
Researchers are looking into venom not as a lethal threat, but as a sophisticated solution to some problems. The mapping, extraction, and synthesis of venom compounds into medicine is called Venomics.
The reason venom makes such a compelling drug candidate is its specificity. Venoms only attack the specific cells it was designed to harm. Other compounds and medicines often suffer from off-target effects, causing unwanted side effects in addition to therapeutic benefits.
Venom peptides, by contrast, are surgically precise. Because a predator needs to incapacitate prey instantly, evolution has perfected toxins that bind exclusively to specific ion channels, cellular receptors, or blood enzymes. A single drop of venom from a cone snail or venomous snake contains hundreds of unique biochemical keys, each precisely shaped to fit specific proteins on human and mammal cells.
Here are some examples of medicines that have been derived from venom, and there are more to come.
- Captopril is an ACE inhibitor and is one of the early breakthroughs in modern cardiovascular medicine. This blockbuster blood pressure medication was derived from a peptide in Brazilian viper venom that causes prey’s blood pressure to plummet.
- The saliva of the Gila monster laid the foundation for modern GLP-1 medicines.
- Derived from the hunting toxin of a predatory sea snail, Piralt (also called Ziconotide) targets specific channels in the spinal cord to block chronic pain signals thousands of times more effectively than morphine—without the risk of addiction.
Despite these successes, medicine has faced a major hurdle when deriving compounds from these venoms. Venoms are poisonous. Scientists need to re-engineer them so they don’t harm patients. That issue has been resolved by the convergence of genomics, high-resolution cryo-electron microscopy, and generative AI.
Instead of milking thousands of dangerous creatures in a lab, as was done previously, researchers can now sequence a species’ genome and decode its toxins electronically. Machine learning models that are trained on structural biology data screen millions of compounds, predicting which molecules will hit cancer cells or target pain pathways without triggering toxicity.
There are recent clinical trials for medicines derived from venom using these new techniques.
- Engineered peptides like chlorotoxin (originally discovered in deathstalker scorpion venom) are being paired with CAR T-cell therapies for cancer. The venom-derived peptide guides immune cells directly to glioblastoma brain tumors while sparing healthy brain tissue. This is an exciting development in the treatment of brain cancer, a cancer that has been difficult to treat due to the blood-brain barrier.
- There is more development in using venomous compounds for non-opioid pain relief. Compounds derived from tarantula and sea anemone toxins are offering a way to shut down pain sensation at the peripheral nerve level without affecting the brain or triggering dependence.
- Molecules derived from the Fraser Island funnel-web spider are being studied for their ability to block the “death signal” sent to heart cells during a heart attack, potentially preventing permanent tissue damage after stroke or cardiac arrest.
(What is the heart “death signal”? A heart attack occurs when a blocked artery cuts off blood flow to the heart muscle. Starved of oxygen, the heart cells no longer produce the essential energy molecule they need to survive and pump. That causes the cell’s internal chemistry to fail, and calcium levels skyrocket. The toxic buildup of calcium, combined with cellular stress, targets the mitochondria—the powerhouses of the cell—causing the pores to burst. When these pores open, water rushes into the mitochondria, causing them to swell and burst. This catastrophic failure releases deadly proteins into the rest of the cell, acting as the “death signal” which forces the heart cell to self-destruct or rupture. Because adult heart muscle cells cannot replace themselves, the affected area is permanently damaged and replaced by stiff scar tissue. Blocking this “death signal” is crucial to recovery from a heart attack.)
Estimates suggest that less than 1% of the toxins present in venomous animals have been studied. Earth’s spiders, snakes, scorpions, marine snails, and jellyfish could be a living encyclopedia of biochemical solutions to complex physiological problems.
The ultimate irony of venomics is that the very creatures that we have feared or attempted to eradicate may hold the keys to treating diseases. As science catches up to hundreds of millions of years of natural selection, the world’s most toxic creatures may be proving to be our healers. Once again, we can thank one of the organisms that we have ignored, found repulsive, or feared for medical breakthroughs.
