One protein makes fruit flies live longer
A little-known protein has been shown to extend the lifespan of fruit flies by improving how their cells produce energy.
Mitochondria are the structures inside every cell responsible for generating energy in the form of ATP (adenosine triphosphate). As organisms age, mitochondrial function declines. That decline contributes to cellular damage and age-related disease. Researchers have long sought ways to slow or reverse it.
New research shows that increasing levels of a protein called FAM162A improves mitochondrial function in fruit flies and significantly extends their lifespan. The study found that flies with higher FAM162A expression lived longer and showed better physical performance at older ages, suggesting improvements in both lifespan and healthspan.
How FAM162A works inside the cell
FAM162A is located in the inner membrane of mitochondria. It plays a role in regulating the electron transport chain, the process by which mitochondria convert nutrients into ATP. When this process runs more efficiently, less oxidative damage is produced as a byproduct. Oxidative damage accumulates over time and is a major driver of cellular aging. Reducing it slows the process.
Flies with elevated FAM162A lived measurably longer than controls. They also moved better in late life. That combination of extended lifespan and preserved physical function is exactly what longevity researchers look for when evaluating a potential intervention target.
The gap between flies and humans
Fruit flies are a standard model organism in aging research. They share many fundamental biological mechanisms with mammals, including humans. But the gap between a fly result and a human therapy is large. Whether FAM162A plays a comparable role in human aging is not yet known.
What the finding does confirm is that improving mitochondrial efficiency is a viable strategy for slowing aging. Mitochondria are not passive energy suppliers; they actively shape how fast an organism ages. Proteins like FAM162A may point the way toward future interventions worth pursuing in mammalian models.