Scientists Found a Protein That Helps Explain Brain Aging

Brain Game: As we age, our risk of memory loss, mood changes, and cognitive decline increases. Scientists are working to uncover the biological changes behind these shifts in hopes of finding new ways to keep the brain healthier for longer. They may have uncovered one piece of that puzzle. A new study highlights a protein called KLF4, which helps maintain healthy blood vessels in the brain.

The Study: Researchers investigated KLF4 in mice and found that removing it from the cells lining blood vessels caused middle-aged animals to develop signs of accelerated brain aging, including nerve cell loss, memory problems, and anxiety-like behaviors. The findings suggest that declining KLF4 may contribute to age-related brain changes by disrupting the brain’s vascular system.

Bottom Line: The study adds to growing evidence that healthy brain aging depends on healthy blood vessels. Many of the same habits that protect your heart — regular exercise, managing blood pressure, eating a balanced diet, and getting enough sleep — also support long-term brain health.

Keep in Mind: This was a mouse study, so it’s too early to know whether boosting KLF4 would have the same effect in people. Researchers also removed KLF4 from blood vessel cells throughout the body, meaning some of the observed effects may not have originated solely in the brain.