Roles of Nerve in Regeneration and Scar Healing of SkinWound (review) / 中国康复理论与实践

ABSTRACT

@#Nerve is the foundation of the physiological function such as the skin feeling and thermoregulation, and also regulates the regeneration and scar healing of skin wound by multiple mechanisms. Though the denervated skin wound can heal spontaneously, the nerve might accelerate wound healing by activating the neurogenic inflammation and nerve trophism, increasing the blood supply around the wound, promoting the proliferation of fibroblasts and keratinocytes, stimulating the expression of collagen I and III, and interacting with immune system and releasing neuropeptides. If all kinds of repair cells, extracellular matrix, nerve, blood vessel and cutaneous appendages assemble organically, the skin wound regenerates, and otherwise the scar heals. The nerve axon growth occurs mainly in the early stage of the wound healing and the scar rebuilding process, and the nerve growth rate is obviously slower than the granulation tissue formation and cicatrization. Furthermore, the axon growth of different nerve fibers are not entirely the same. The exogenous neuropeptides might promote the wound repair and the nerve regeneration. The antagonist of the neuropeptides or high selective nerve abscission might reduce the scar hyperplasia. Therefore, it contribute to find methods to promote the regeneration of skin wound and peripheral nerve injury by understanding the effects and regulatory mechanism of both nerve and various repair elements in regeneration or scar healing of skin wound.