One gene makes fruit flies live longer
A gene that barely registers outside research labs turns out to significantly extend the lifespan of fruit flies. And it does so by improving how mitochondria work.
Researchers increased the production of a protein called FAM162A in fruit flies. The animals lived longer and their mitochondria functioned better than normal. Mitochondria are small structures inside cells that produce energy in the form of ATP (adenosine triphosphate), a molecule cells use to power almost everything they do. When mitochondria begin to fail, cells age faster.
What FAM162A actually does
FAM162A is normally found at the outer membrane of mitochondria. The protein influences how efficiently mitochondria generate energy and how they handle damage. The study showed that higher levels of FAM162A lead to more efficient energy production and less oxidative damage. Oxidative damage is a byproduct of energy production: small reactive molecules damage proteins and DNA over time, and that damage accumulates with age.
By increasing FAM162A, the mitochondria appeared to stay in better condition for longer. The flies also remained more active at older ages compared to control groups. That is a meaningful benchmark: not just lifespan, but the quality of that extra time.
From fly to human: what remains unknown
Fruit flies are a widely used model in aging research because their biology overlaps with mammals on many points. But the leap to humans is significant. Many genes that work in flies have no equivalent in humans, or play very different roles. FAM162A does exist in human cells, but whether increasing it produces comparable effects remains unknown.
What the research does confirm is that mitochondrial function remains a consistently relevant target for aging research. Multiple studies from different angles point to the same core idea: cells that produce energy efficiently and limit damage age more slowly. FAM162A is a new entry point into that broader picture.