Ancient proteins from the Jurassic period may defeat modern superbugs
In short: We are entering an era where common infections could become untreatable as bacteria evolve to bypass our strongest medicines. To fight back, scientists are looking backward in time, resurrecting 160-million-year-old biological defenses to find new ways to kill the world's most dangerous drug-resistant microbes.
Antibiotic resistance occurs when bacteria mutate or engage in horizontal gene transfer—a process where they swap genetic material to share survival traits. This allows them to develop defenses against drugs that were once life-saving. As these 'superbugs' multiply, they threaten to make routine medical procedures, such as surgeries and organ transplants, high-risk gambles because the body's defenses may no longer have reliable chemical support. This evolutionary adaptation means that once-simple infections can quickly become deadly. These microorganisms are essentially learning to survive the very drugs designed to inhibit them.
To combat this, researchers at the University of Oregon have reconstructed antimicrobial peptides from the common ancestor of all placental mammals. Roughly 160 million years prior, during the Jurassic Period's final stages, these proteins first appeared. One specific protein of interest is lactoferrin, which is found in most body fluids except blood. Its primary role is to starve pathogens by binding to iron, but it also contains peptides that directly attack and rupture bacterial membranes. This protein is present in various fluids, including saliva, tears, and breast milk. It serves as a critical component of the body's initial immune response.
The study, published in PLOS Biology on August 25, revealed a surprising result: some of these prehistoric peptides were actually more potent against drug-resistant bacteria than the versions found in modern human species. By tracing these evolutionary relics, scientists hope to engineer new therapeutics that can complement or replace failing antibiotics, using the body's ancient first line of defense to solve a 21st-century crisis. Matt Barber, a senior author of the study, notes that antibiotics were a 20th-century breakthrough. However, he emphasizes that bacteria have been evolving resistance to these drugs for a very long time.
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Sources
- Summary by Intellect · source: The Science Of The Next Global Calamity Emerging: Superbugs
- Also: 160-million-year-old proteins show surprising power against superbugs
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