As we grow older, our brains age naturally, and some abilities like memory and learning start to slow down. Past research suggests that leading a healthy lifestyle, including eating well, can help slow down this brain aging process. Now, scientists from the Buck Institute for Research on Aging have discovered that cutting back on the amount of food we eat might also protect our brains from aging.
The study pinpointed a specific gene that benefits from calorie restriction, playing a role in promoting healthy brain aging. As our bodies, including our brains, age, it's common for certain brain functions like memory and learning to decline, according to the National Institute on Aging. They advise that maintaining a healthy lifestyle, involving activities like exercise, stress management, social connections, and proper nutrition, can help slow down the aging of the brain.
The Buck Institute researchers, based in Novato, CA, found that restricting food intake could be another way to safeguard the brain from aging. Their study, published in the journal Nature Communications, focused on a gene that becomes more active when calorie intake is limited, contributing to processes vital for maintaining a healthy aging brain.
Dr. Lisa Ellerby, a professor at the Buck Institute, shared that they explored the impact of calorie restriction on brain aging because the brain is particularly vulnerable as we age. She emphasized the importance of understanding factors influenced by dietary restriction that can protect the brain. Many people are adopting various forms of caloric restriction, such as intermittent fasting, and this research is a step toward understanding how these efforts might influence brain aging.
The study involved using both fruit fly models and human cells to examine the effects of calorie restriction on aging. By studying 160 different fly strains with various genetic backgrounds, the researchers identified five genes, one of which corresponds to the OXR1 gene in humans and rodents. This gene, when enhanced through calorie restriction, influences processes related to healthy brain aging.
Dr. Ellerby explained that the OXR1 gene also affects the retromer, a cellular complex responsible for recycling proteins and lipids. This unexpected connection between the OXR1 gene and retromer function opens new possibilities for understanding the role of protein recycling in the aging process.
The researchers believe their findings could lead to identifying therapeutic targets to slow down aging and age-related neurodegenerative diseases. By boosting OXR1 levels in the flies through genetic manipulation, they plan to explore small molecules that could increase OXR1 expression as a potential therapeutic approach for the aging brain.
Dr. Clifford Segil, a neurologist at Providence Saint John’s Health Center, commented on the study, noting the importance of further research to determine if dietary and caloric restriction can help prevent neurodegenerative diseases. He suggested that individuals using injectable weight loss medications could serve as valuable data for future research on the impact of dietary restriction on brain health.
In conclusion, understanding how our diet may influence the aging process of the brain is a crucial step in developing strategies to promote healthy brain aging and potentially prevent neurodegenerative diseases.
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