Naked mole rat's longevity secret transferred to mice in breakthrough aging study

In a laboratory at the University of Rochester, researchers have done something that seemed impossible just a decade ago: they took a longevity secret from one mammal and made it work in another. The mechanism they borrowed comes from the naked mole rat, a wrinkled, hairless creature the size of a mouse that lives forty-one years—nearly ten times longer than its rodent cousins and almost never gets cancer. By introducing a single gene from the mole rat into ordinary laboratory mice, the team extended the animals' lifespans by an average of 4.4 percent and, more importantly, kept them healthier as they aged. The work, published in Nature, represents a proof that evolution's solutions to aging can be translated across species.

The naked mole rat has long fascinated biologists precisely because it breaks every rule about how mammals are supposed to age. A creature so small should live three to four years at most. Instead, it thrives for decades in underground colonies, its body seemingly immune to the diseases that kill other animals its size. It develops tumors at a rate so low that researchers have struggled to find enough cases to study. It resists heart disease, arthritis, and neurodegeneration. For years, scientists have been reverse-engineering the mole rat's biology, searching for the switches that turn off aging.

The key they found is a molecule called high-molecular-weight hyaluronic acid, or HMW-HA. Naked mole rats carry roughly ten times more of this substance in their tissues than humans or standard mice do. When researchers removed HMW-HA from mole rat cells in earlier experiments, the cells became vulnerable to tumors. The opposite seemed plausible: add more HMW-HA, and cells might become more resistant. The question was whether this would work in a different species entirely.

To test the idea, the Rochester team inserted the mole rat's version of the hyaluronan synthase 2 gene—the gene responsible for making HMW-HA—into the genome of laboratory mice. The modified animals began producing elevated levels of hyaluronic acid throughout their bodies. The results were striking. These mice showed greater resistance to spontaneous tumors and to skin cancer induced chemically in the lab. But the benefits extended far beyond cancer prevention. The modified mice aged more gracefully overall. Their tissues showed less chronic inflammation, a hallmark of aging in mammals. Their intestinal health remained better preserved. Vera Gorbunova, a professor of biology and medicine at Rochester who led the work, described it as proof that longevity mechanisms evolved in long-lived mammalian species could be exported to improve lifespan in others.

The 4.4 percent gain in lifespan is modest—a mouse living a few months longer is not a revolution. But the significance lies elsewhere. The study demonstrates that a single genetic intervention, borrowed from nature's most extreme example of slow aging, can be successfully transplanted into a different mammal and produce measurable benefits. It suggests that aging is not a monolithic process but a collection of mechanisms that can be individually addressed. The mole rat's longevity does not depend on one factor but on multiple overlapping strategies: resistance to cancer, control of inflammation, cellular protection, and genetic stability.

The researchers are already moving toward human application. Andrei Seluanov, another author of the study, noted that the team is testing molecules in preclinical studies that could slow the breakdown of hyaluronic acid in the human body. Gorbunova said the team spent ten years moving from the initial discovery of HMW-HA in mole rats to demonstrating its benefits in mice. The next decade, she suggested, would focus on translating those benefits to humans. Recent research has only deepened the puzzle: a 2025 study in Science identified a DNA repair protein in naked mole rats that may also contribute to their slow aging. The picture emerging is of an animal whose resistance to time is built on multiple biological foundations, each one potentially useful, each one potentially transferable.

The challenge ahead is not just scientific but practical. Can these evolutionary strategies be adapted safely for human use? Can a molecule that works in a mouse be scaled to a human body without unintended consequences? The naked mole rat has spent millions of years perfecting its approach to longevity. Humans are only beginning to read the manual.