The 'Fasting Gene' May Extend Your Lifespan

Overview

• The OXR1 gene protects neurons and delays brain aging by enhancing the retromer system, which aids in the recycling of cellular proteins and fats.

• Research indicates that calorie restriction can extend lifespan by up to 300% in animals and might potentially add five years to human life expectancy when practiced moderately.

• A more in-depth understanding of the OXR1 gene could pave the way for interventions that mimic the advantages of calorie restriction without extreme dietary limitations.

Calorie Restriction Could Extend Your Life by Five Years

Noteworthy findings from studies on calorie restriction have shown significant lifespan extensions of up to 300% in various species, from yeast and worms to mice and monkeys.

Short-term human trials have suggested that by restricting calories, improvements in bloodwork indicate the potential to increase lifespan by up to five years. However, the challenge lies in the fact that this level of caloric restriction, which entails a one-third reduction in caloric intake, may be impractical for many individuals who derive too much enjoyment from food to endure such drastic cutbacks for a few extra years of life.

Researchers have pondered whether uncovering the mechanisms behind the effectiveness of calorie restriction could lead to strategies for extending lifespans without the need for dietary restrictions in the future. This could be the scientific solution to the age-old dilemma of "having your cake and eating it too!"

The Buck Institute, renowned for its research in aging, had previously identified various mechanisms involved in the anti-aging effects of calorie restriction. One aspect that piqued their interest was the impact of calorie restriction on brain function.

To delve deeper, they initiated a study involving 200 strains of flies.

The Significance of a Single Gene

In their study, researchers at the Buck Institute raised flies with diverse genetic backgrounds on either a standard diet or one severely restricted to only ten percent of normal caloric intake. Through their investigation, the team identified five genes with specific variants that significantly influenced longevity under dietary restrictions, two of which had human genetic counterparts.

One of these genes, OXR1, was chosen for further analysis. This gene is known to shield cells from damage caused by free radicals, and its depletion can result in severe neurological issues and premature death. However, the mechanism by which a neuron-active gene impacts lifespan was previously unknown.

The Buck team conducted extensive tests to unravel this mystery. Their findings revealed that dietary restriction slows down brain aging by preserving the retromer system through OXR1.

What is the retromer? It is a group of proteins essential for recycling cellular proteins and lipids (fats).

Kenneth Wilson, the lead author of the research published in the journal Nature Communications in January, elaborates: “The retromer plays a crucial role in neurons by determining the fate of all proteins entering the cell."

“Diet influences the expression of this gene. By reducing food intake, you enhance the proper sorting of proteins within your cells since the expression of OXR1 improves."

“When individuals cut back on food consumption, they typically think about its effects on their digestive system or fat accumulation, but often overlook its impact on the brain. However, this gene proves to be vital in brain health."

“Diet affects all bodily processes. This study supports the importance of maintaining a healthy diet because what you eat can have far-reaching consequences.”

Our Perspective

We wholeheartedly agree. A fundamental approach to combat aging signs and symptoms is to maintain a healthy diet, such as embracing a plant-rich diet, which naturally limits caloric intake. For those seeking further benefits without the need for a 30% calorie reduction, Pankaj Kapahi, a professor at Buck Institute and senior study author, recommends exploring intermittent fasting.

Summary