Restore Youthfulness & Vitality to the Aging Brain & Body | Dr. Tony Wyss-Coray

Quick Overview

Exposing aged mice to factors from young blood reactivates brain stem cells, reduces inflammation, increases neuronal activity, and significantly improves memory function, indicating that bloodborne factors actively influence and can reverse key features of aging in the brain and other tissues.

Key Points: Parabiosis experiments showed that infusing an old mouse with young circulation regenerated aged muscle, and similarly, young factors improved the aged brain, evidenced by reactivated stem cells, less inflammation, and improved memory function. Dr. Wyss-Coray's lab identified proteins that circulate highly in young blood and diminish with age, which, when supplied to the aged body and brain, can reverse aging features, including improved cognition and tissue recovery. The composition of blood changes dramatically from young to old, to the extent that researchers can predict a person's age from measuring 3,000 proteins in their blood, suggesting these factors actively influence organ function, not just reflect status. Clinical trials, including blinded, placebo-controlled studies on Alzheimer's patients using therapeutic plasma exchange and albumin infusion, showed clear significant benefits, suggesting potential for human translation of these rejuvenation factors. Organs age at different rates; molecular tools allow estimation of an organ's age (e.g., liver age) from blood protein profiles, and the resulting 'age gap' (difference between actual age and organ age) strongly predicts future disease risk in that specific organ. Factors like exercise and caloric restriction transmit beneficial effects to the brain via bloodborne molecules, such as Clusterin (ApoJ) released from the liver post-exercise, demonstrating inter-organ communication through physiology. The concept of antagonistic pleiotropy suggests that factors promoting vitality when young, like high Growth Hormone and IGF-1 during puberty, can decrease lifespan later in life, contrasting with factors found in young blood that restore both vitality and health span.