Naked mole rats are nature's unlikely superheroes. These small, wrinkled rodents live for decades, resist cancer with remarkable consistency, and fend off diseases that typically accompany old age in other mammals. Now researchers have figured out how to borrow one of their biological superpowers and transplant it into mice with measurable success.
A team at the University of Rochester isolated a gene responsible for producing high molecular weight hyaluronic acid (HMW-HA), a substance that naked mole rats naturally manufacture at levels roughly ten times higher than humans or mice. By engineering mice to carry the naked mole rat version of this gene, the researchers created animals that lived longer, stayed healthier, and showed stronger resistance to both spontaneous and induced tumors.
The work, published in Nature in 2023, represents a watershed moment in aging research. It demonstrates that longevity traits evolved by one species can actually transfer to another. The genetically modified mice experienced a 4.4 percent increase in median lifespan compared with ordinary mice.
"Our study provides a proof of principle that unique longevity mechanisms that evolved in long-lived mammalian species can be exported to improve the lifespans of other mammals," said Vera Gorbunova, a biology professor at Rochester who led the work with colleague Andrei Seluanov.
Naked mole rats represent one of nature's most striking biological puzzles. These rodents, roughly mouse-sized, can live up to 41 years, nearly ten times longer than other small rodents of similar size. As they age, they largely avoid conditions that plague most mammals: cancer, neurodegeneration, cardiovascular disease, and arthritis. For decades, researchers have been trying to crack their genetic code.
The HMW-HA molecule emerged as a prime suspect. Earlier work showed that when researchers removed it from naked mole rat cells in the lab, those cells became far more prone to tumor formation. This suggested the molecule offered powerful protection against cancer and age-related damage.
The Rochester team decided to test whether that protection could work across species lines. They engineered mice to produce the naked mole rat version of the hyaluronan synthase 2 gene, the biological instruction manual for manufacturing HMW-HA. While all mammals carry this gene, the naked mole rat version appears to be especially efficient at driving gene expression and boosting HMW-HA production.
The modified mice developed elevated hyaluronic acid levels throughout multiple tissues. More importantly, they showed significantly better defenses against both spontaneous tumors and chemically induced skin cancer. The benefits extended far beyond tumor resistance. These engineered mice maintained less inflammation as they aged, preserved better gut health, and displayed overall improvements in physical condition.
The reduction in chronic inflammation proved particularly significant. Since chronic inflammation is considered one of the hallmark features of aging, any mechanism that controls it may have broad cascading effects on health and longevity. Researchers suspect HMW-HA works partly by directly influencing immune function, though the exact mechanisms require further study.
The 4.4 percent lifespan extension might sound modest, but scientists emphasize the larger breakthrough. This was not merely a mouse study about a single gene. It was proof that nature's long-lived species harbor biological tools that can be studied, adapted, and potentially modified for human benefit.
"It took us 10 years from the discovery of HMW-HA in the naked mole rat to showing that HMW-HA improves health in mice," Gorbunova noted. "Our next goal is to transfer this benefit to humans."
The pathway to human application appears to have at least two promising routes. One strategy involves slowing the body's breakdown of HMW-HA. Another focuses on increasing its production. Seluanov reported that researchers have already identified molecules that slow hyaluronan degradation and are testing them in preliminary trials.
Since the 2023 publication, other discoveries have deepened the naked mole rat story. A 2025 study in Science identified another potential longevity mechanism centered on a protein called cGAS, which normally supports immune defense. In humans and mice, cGAS can actually interfere with some DNA repair processes. But the naked mole rat version appears to enhance DNA repair effectiveness instead. The study found that specific changes in the naked mole rat protein improved genome stability and delayed aging markers in experimental systems.
These discoveries do not contradict one another. Instead, they suggest naked mole rats possess multiple overlapping defenses: cancer resistance, inflammation control, DNA repair efficiency, and tissue protection. For human aging research, this pattern matters enormously. A single molecule is unlikely to serve as a simple fountain of youth. But each new discovery opens another potential avenue for targeting the biological processes that drive age-related disease.
The challenge ahead is clear. Scientists must determine whether the biological tricks that work in mice can be safely adapted to improve human health and lifespan. The 2023 gene transfer study remains a striking proof that survival strategies evolved in one of nature's strangest mammals can reduce disease risk and extend healthy life in other mammals. Whether humans are next remains an open question.
Author Jessica Williams: "Taking a survival strategy from an animal that looks like a raw hot dog and making it work in mammals we actually care about is a hell of a scientific achievement, and it suggests we've barely scratched the surface of what nature's extreme outliers can teach us about aging."
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