Stanford Scientists Reverse Age-Related Memory Loss by Targeting the Gut
A new Stanford Medicine study, partly supported by the Blavatnik Family Fellowship Fund at the Stanford University School of Medicine, suggests that age-related memory decline may be influenced not only by changes in the brain, but also by changes in the gut. Published in Nature, the study found that shifts in the gut microbiome of older mice can trigger gastrointestinal inflammation, disrupting signals sent through the vagus nerve to the hippocampus, a brain region central to memory formation. When young mice were exposed to older microbiomes, they showed declines in memory and navigation; when researchers restored gut-brain communication in older mice, memory performance improved. The findings identify a pathway linking gastrointestinal aging, immune response, vagus nerve activity, and hippocampal function. Although the research was conducted in mice, it points to new ways of understanding cognitive decline through the gut-brain connection.
