The new study gives scientists a more specific mechanism to investigate. Rather than simply observing that mitochondria become less effective with age, the researchers identified a change in membrane composition that appears to be associated with the loss of mitochondrial flexibility.
The findings could lead researchers toward several new questions:
- Can the mechanism be reproduced in human cells? The researchers will need to establish whether restoring phosphatidylcholine produces similar effects outside laboratory worms.
- Can the process be targeted safely? Increasing a molecule in an organism does not automatically mean that doing so would be beneficial or safe as a treatment.
- Why do the levels change with age? Understanding what causes phosphatidylcholine to decline could reveal another part of the aging process.
- Why are there sex-specific differences? The observed differences could help explain why certain age-related biological changes affect men and women differently.
This Does Not Mean Humans Can Take Choline To Reverse Aging
The word “reverse” is doing a lot of work when this research is described. The experiment showed younger mitochondrial characteristics in worms after they received choline or phosphatidylcholine. It did not demonstrate that people can reverse biological aging by taking either substance.
Human aging is also far more complicated than mitochondrial function alone. Multiple biological systems change with age, including metabolism, cellular repair, gene regulation and other processes. Altering one pathway would not necessarily reverse all of those changes.
