Dietary Restriction Is Evolutionarily Conserved On The Phenotypic And Mechanistic Level
Have you ever wondered why eating less might help you live longer? Scientists have long observed that reducing food intake without causing malnutrition, a practice known as dietary restriction, can extend lifespan in many different creatures. This has led to the idea that the anti-aging effects of eating less might be a very old, fundamental biological process.
A recent study explored this by looking at how dietary restriction affects eight different species of fruit flies. The researchers found that, across these diverse fly species, eating less consistently led to longer lives. This suggests that the outward effects of dietary restriction, like increased longevity, are indeed widely conserved in evolution.
However, when the scientists looked deeper at the genetic level, they found a more complex picture. Using advanced techniques to compare gene activity across species, they discovered that while many of the genetic changes in response to dietary restriction were unique to specific groups of flies, some core mechanisms were surprisingly consistent. They even identified a set of genes that are conserved and play a role in lifespan extension, with several of these genes being linked to cysteine metabolism, a process that could be a target for future anti-aging therapies.
These findings are exciting because they suggest that even though the full picture of how dietary restriction works can vary, there are fundamental, shared biological pathways that contribute to its benefits. Understanding these core mechanisms could pave the way for new strategies to promote healthy aging in humans.
Source: link to paper