Wound healing is a complex biological process that can, in adult mammals, lead to discomforting and ugly fibrotic scar tissues. In contrast, among lower organisms and in fetuses, injuries repair as identically regenerated tissues.
Wounds activate an ancient developmental Wnt/beta-catenin pathway, which Dikshya Bastakoty and Pampee Young, M.D., Ph.D., and colleagues have previously shown to be involved in scar formation.
Now in a study published in the FASEB Journal, the team demonstrates that topical application of mechanistically distinct small-molecule Wnt inhibitors can reduce scarring in mice after skin injuries.
They show that inhibiting the Wnt pathway promotes regenerative repair over fibrotic healing. Treatment with Wnt inhibitors improved healing. The healed skin resembled normal, uninjured skin.
This study suggests that Wnt inhibitors can regenerate injured skin. They also may be useful in the treatment of fibromatosis, degenerative joint disease and cancer.