Implanted Hair Follicle Stem Cells Form Schwann Cells That Support Repair of Severed Peripheral Nerves

The study demonstrated that hair follicle stem cells from the vibrissa follicle bulge area in mice could differentiate into Schwann cells, which are essential for nerve regeneration. When these stem cells were implanted into the gap of a severed sciatic nerve in mice, they significantly enhanced nerve regeneration and functional recovery, as shown by improved muscle contraction and walking ability. After 2 months, the transplanted cells integrated into the nerve, forming myelin sheaths around axons and facilitating nerve regrowth. This suggested that hair follicle stem cells could be a viable and accessible source for regenerative medicine, particularly in repairing peripheral nerve injuries.