Naked Mole Rat Longevity Gene Extends Lifespan and Improves Health in Mice
Aging is often viewed as an inevitable decline, but nature provides a few remarkable exceptions. The naked mole rat, a small, wrinkled rodent, is one of the most resilient mammals on Earth. These animals live for decades, rarely develop cancer, and remain protected from many age-related diseases that plague other species. Now, researchers at the University of Rochester have successfully transferred a longevity gene from the naked mole rat into mice, proving that the biological secrets of long-lived species can be exported to improve the health and lifespan of other mammals.
- Researchers transferred the hyaluronan synthase 2 (Has2) gene from naked mole rats to mice.
- The modification led to an approximate 4.4 percent increase in median lifespan for the mice.
- Modified mice showed stronger resistance to tumors and lower levels of age-related inflammation.
- The study provides a proof of concept for potentially adapting these longevity mechanisms for human health.
Why Naked Mole Rats Are Aging Superstars
Naked mole rats are biological anomalies. While most rodents have short lifespans, naked mole rats can live up to 41 years—nearly ten times longer than similarly sized rodents. Their resilience isn’t just about living longer; it’s about living healthier. As they age, they avoid many conditions common to other mammals, including cardiovascular disease, arthritis, neurodegeneration, and cancer.
A primary driver of this resilience is a substance called high molecular weight hyaluronic acid (HMW-HA). Naked mole rats possess roughly ten times more HMW-HA than humans or mice. Previous research demonstrated that when HMW-HA is removed from naked mole rat cells, those cells become significantly more prone to forming tumors, highlighting the molecule’s protective role.
The Breakthrough: Transferring the Has2 Gene
To determine if this protection could be replicated in another species, a team led by Vera Gorbunova, the Doris Johns Cherry Professor of biology and medicine at Rochester, and Andrei Seluanov, a professor of biology, engineered mice to carry the naked mole rat version of the hyaluronan synthase 2 (Has2) gene.
While all mammals have a version of the Has2 gene, the naked mole rat’s version is exceptionally active. This increased activity drives stronger gene expression, resulting in the higher production of the protective HMW-HA molecule. The results, published in Nature, confirmed that the modified mice developed higher levels of hyaluronan across several tissues.
“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,” says Vera Gorbunova.
Impact on Healthspan and Disease Resistance
The benefits of the gene transfer extended far beyond a simple increase in years. The modified mice experienced a meaningful improvement in their overall “healthspan”—the period of life spent in good health.
- Cancer Resistance: The mice demonstrated stronger protection against both spontaneous tumors and chemically induced skin cancer.
- Inflammation Control: Chronic inflammation is a hallmark of aging. The modified mice showed significantly less inflammation in multiple tissues as they aged.
- Gut Health: The researchers observed that the mice maintained healthier guts compared to ordinary mice.
While the 4.4 percent increase in median lifespan is modest, the broader implication is profound. It demonstrates that nature’s survival strategies are adaptable, suggesting that biological tools from long-lived species can be studied and potentially repurposed for other mammals.
The Path to Human Longevity
The ultimate goal for the University of Rochester team is to translate these findings into human benefits. Researchers believe there are two primary pathways to achieve this: slowing the breakdown of HMW-HA already present in the body or increasing its production.
Andrei Seluanov notes that the team has already identified molecules that slow down hyaluronan degradation and is currently testing them in pre-clinical trials. “We hope that our findings will provide the first, but not the last, example of how longevity adaptations from a long-lived species can be adapted to benefit human longevity and health,” Seluanov says.
A Multi-Layered Defense Against Aging
The HMW-HA discovery is part of a larger pattern of resilience in naked mole rats. Recent research, including a 2025 study in Science, has pointed to other mechanisms, such as the cGAS protein. While cGAS can interfere with DNA repair in humans and mice, the naked mole rat version helps cells repair DNA damage more effectively, improving genome stability and delaying signs of aging.
These overlapping defenses—cancer resistance, inflammation control, and enhanced DNA repair—suggest that there is no single “fountain of youth” molecule. Instead, longevity is the result of several integrated biological systems working together to protect the organism from decay.
Frequently Asked Questions
Will there be a “longevity pill” based on this research?
While the research is promising, we aren’t at the stage of a commercial pill. Scientists are currently in pre-clinical trials testing molecules that prevent the breakdown of HMW-HA. Human application will require extensive safety and efficacy testing.
What exactly is HMW-HA?
High molecular weight hyaluronic acid (HMW-HA) is a large molecule found in the extracellular matrix of tissues. In naked mole rats, its high concentration helps prevent cancer and reduces the chronic inflammation associated with aging.
Why use naked mole rats instead of other long-lived animals?
Naked mole rats are uniquely valuable because they are mammals with a lifespan and cancer resistance that vastly exceed those of other rodents, providing a clear biological contrast that allows scientists to isolate specific longevity genes.