A mechanism by which Sirt1 protein operates in the brain to bring about a significant delay in aging and an increase in longevity has been discovered by scientists.
The researchers found that the median life span of mice in the study was extended by 16 percent for females and 9 percent for males, however, translated to humans, this could mean an extra 13 or 14 years for women, making their average life span almost 100 years. For men, this would add another seven years, increasing their average life span to the mid-80s.
Shin-ichiro Imai, MD, PhD, and his colleagues at Washington University School of Medicine in St. Louis have shown how Sirt1 prompts neural activity in specific areas of the hypothalamus of the brain, which triggers dramatic physical changes in skeletal muscle and increases in vigour and longevity.
In addition to positive skeletal muscle changes in the BRASTO mice, the investigators also observed significant increases in night-time physical activity, body temperature and oxygen consumption compared with age-matched controls.
The study is published in journal Cell Metabolism.