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J Invest Dermatol. 1984 Sep;83(3):219-23.

The regeneration of substance P-containing nerve fibers in the process of burn wound healing in the guinea pig skin.


The regeneration of substance P (SP)-containing nerve fibers in the process of burn wound healing in the guinea pig skin has been studied by immunohistochemistry. SP-like immunoreactivity, which was specifically localized in neural elements of intact skin, was found to disappear in the burn wound including its margin on day 2 post burn. The SP-containing nerve fibers were first detected in periods later than day 2 post burn, and the regeneration seemed to occur in association with regeneration of blood vessels at the wound margins. These nerve fibers gradually increased in number and acquired maximum density on day 14 post burn. In addition, such renewed fibers showed sprouting to form a dense network, which has never been observed in intact skin, in the upper granulation tissue just beneath the regrowing epidermis. Following that peak period, the density of the fibers gradually decreased to less than that of controls. The characteristic process of regeneration of SP-containing nerve fibers, having a peak period of fiber density at least in burn wound healing, appeared similar to that of the regeneration of sympathetic catecholaminergic nerve fibers reported previously.

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