What Can Bats Teach Us About Longevity?

Key takeaways

• A new genomic analysis of eight long-lived bat species found a strong link between lifespan and the strength of the immune system.
• Longer-lived bats carry higher activity in genes that help clear out damaged or abnormal cells before they can cause problems.
• When bat cells face severe damage, the longest-lived species didn't try to repair themselves. They shut the damaged cells down entirely, a strategy also seen in other notably long-lived, resilient animals.
• The bigger picture: the same genetic toolkit that keeps bats' immune systems sharp may also be part of what lets them live so long.

Looking to bats for longevity clues

Bats are an unusual case study in aging. Relative to their size, many species live far longer than expected, and some closely related bats show dramatic differences in lifespan for reasons scientists are still working out. One tagged Brandt's myotis was recaptured 50 years after it was first banded, an extraordinary lifespan for an animal that size.

Researchers at UC Berkeley set out to sequence and compare genomes across the Myotis genus, which includes both unusually long-lived species and close relatives that live only a fraction as long. The goal was to find genetic patterns that track with lifespan, using bats as a natural experiment nature had already run.

What the genomes revealed

Across eight Myotis genomes, the pattern that stood out most was immune-related. Longer-lived bats had elevated activity in genes tied to keeping the immune system highly responsive, including genes involved in identifying and clearing out cells that have gone rogue. The researchers also found substantial overlap between the genes linked to lifespan and the genes involved in fending off viral threats, more overlap than would be expected by chance.

That overlap suggests these two processes, staying resilient against outside threats and aging well, may be more intertwined at the genetic level than researchers previously assumed.

When damaged cells choose to shut down

To see how bat cells respond to serious stress, the team grew cells from wing biopsies in the lab and exposed them to damaging chemicals. The longest-lived bat in the study, the little brown bat, responded in a way the researchers didn't expect. Rather than ramping up repair machinery, its cells activated pathways that shut the damaged cells down entirely.

This "if you can't save it, remove it" strategy turns out to be shared by other famously long-lived, resilient animals, including elephants. It hints that one path to a long healthy life may involve being decisive about clearing out compromised cells rather than investing energy trying to fix them.

A longevity lens: immunity and aging as one system

This research adds to a growing case that healthy aging and immune resilience aren't separate stories, they're deeply connected. Bats appear to have evolved an immune system that stays highly active throughout life, helping them manage everyday cellular wear and tear as effectively as they manage outside threats.

For humans, the parallel worth sitting with is this: the same systems that help your body respond well to everyday challenges, physical stress, recovery, immune readiness, may also be part of what supports resilience over the long run. It's a reminder that longevity isn't just about any one organ or pathway; it's about how well the whole system continues to defend and repair itself over time.

The takeaway

This is early-stage genomic work, and translating "what bats do" into "what humans should do" will take years of further research. But the direction is compelling: nature has already found several distinct ways to pair a strong immune system with a long healthy lifespan, and studying those solutions side by side may reveal levers relevant to human aging that wouldn't be obvious from studying humans alone.

References:

Juan M. Vazquez, M. Elise Lauterbur, Saba Mottaghinia, Léa Gaucherand, Sarah Maesen, Michael Singer, Sarah Villa, Melanie Bucci, Devaughn Fraser, Genavieve Gray-Sandoval, Zeinab R. Haidar, Melissa Han, William Kohler, Tanya M. Lama, Amandine Le Corf, Clara Loyer, Dakota McMillan, Stacy Li, Johnathan Lo, Carine Rey, Samantha L. R. Capel, Kathleen Slocum, Melissa Sui, William Thomas, Janet Debelak Tyburec, Rachel Brem, Richard Miller, Michael Buchalski, Jose Pablo Vazquez-Medina, Sébastien Pfeffer, Lucie Etienne, David Enard, Peter H. Sudmant. Insights into longevity and virus-driven adaptation from Myotis bat genomes. Nature, 2026; DOI: 10.1038/s41586-026-10932-7