Researchers have discovered that senescent cells, those older cells in the body, are important for healing wounds. In young mice, they noticed a strong, temporary increase in these cells around the wound, which accelerated the healing process. In older animals, this response was weaker and less effective, causing their wounds to close more slowly.
Senescent cells are cells that no longer divide, but do secrete substances that affect the surrounding tissue. Although these cells are often associated with ageing and inflammation, new insights show that they can also have a positive effect. At a young age, they provide an “emergency programme” that stimulates inflammation and tissue repair, thereby promoting wound healing.
The research shows that in older mice, senescent cells are less effective for repair and are more likely to contribute to persistent inflammation. This difference may partly explain why older people have more difficulty healing from injuries. Stimulating a healthy senescent response could therefore be promising for improving recovery processes after injuries in seniors.
This finding highlights the importance of recognising different roles of senescence in the body. Targeted promotion of repair-promoting cells and the reduction of harmful senescent cells could be a novel strategy to support healthy ageing.
Source: Josh Conway
