Gut & MicrobiomeHow Gut Bacteria and Senescent Cells Team Up to Drive Age-Related Disease
As we age, our gut microbiome shifts in ways that accelerate cellular senescence — the process where damaged cells stop dividing but keep releasing harmful signals. This review reveals a two-way feedback loop: age-related changes in gut bacteria alter metabolite production, which either protects against or promotes cellular senescence throughout the body. Senescent cells then release inflammatory signals (called SASP) that further disrupt the gut microbiome, creating a vicious cycle. This network affects multiple organs simultaneously, helping explain why degenerative diseases like Alzheimer's, cardiovascular disease, and osteoarthritis often cluster together in aging individuals. The authors argue that precisely targeting this gut-senescence axis could open new treatment avenues for some of the most stubborn age-related conditions.
