Occurrence of epidermal nerve endings in glabrous and hairy skin of the rat foot after sciatic nerve regeneration

Cell and Tissue Research
N StankovicC Hildebrand

Abstract

The occurrence and distribution of intraepidermal nerve endings in hairy and glabrous skin of the rat foot was examined in normal cases and three months after sciatic neurotomy/suture or a crush lesion. The nerve endings were visualized in cryostate sections with antibodies against protein gene product 9.5. Normal glabrous skin exhibited 23.3 endings/mm length. Neurotomy/suture cases had 6.1 endings/mm. In rats with nerve crush injury the occurrence was normal, but the intraepidermal nerve endings tended to be abnormally short and occurred mainly in the basal layer of the epidermis. In sections from hairy skin countings were not possible. Subjective evaluation indicated that the occurrence of dermal and epidermal axon profiles usually was very deficient after neurotomy/suture and essentially normal after crush. Skin samples from the contralateral side of operated animals showed a normal occurrence and distribution of nerve endings. We also noted that cases subjected to neurotomy/suture showed increased numbers of protein gene product 9.5-immunoreactive intraepidermal cells and an abnormally thin epidermis. We suggest that a highly deficient occurrence of intraepidermal nerve endings may be one factor behind the unsatisfactory r...Continue Reading

Citations

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