Scientists unlock hidden limb regeneration potential in mammals

Scientists once thought mammals could not regrow lost limbs like lizards or salamanders. New research from Texas A&M University now challenges this belief by uncovering suppressed regenerative potential in humans and other mammals. Normally, mammalian healing leads to fibrosis and scarring rather than regeneration. Animals that regenerate form a blastema, a structure that enables new tissue growth. The team at Texas A&M developed a two-stage treatment to redirect fibroblast behaviour in mammals.

The first stage uses fibroblast growth factor 2 to stimulate blastema formation. The second stage introduces bone morphogenetic protein 2 to trigger the growth of new tissue. This approach successfully regenerated major structures such as bone, tendons, and ligaments after amputation.

The study shows that regeneration does not require external stem cells. Instead, the challenge lies in guiding the behaviour of existing cells to achieve the desired outcome. The findings provide a model to understand and potentially overcome regenerative limitations in mammals. This could pave the way for new medical treatments to help humans regrow damaged or lost tissues. The research marks a significant step in exploring the body's hidden regenerative abilities.