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Prevention of death of axotomized hypoglossal neurones and promotion of regeneration by chitin grafting.

Abstract：

:1. Chitin is known to promote skin wound healing. In this study, chitin, prepared from Zuwai crab shell, was used as a bridge between the proximal and distal stumps of cut hypoglossal nerves in shrews. We compared the effects of chitin on the regeneration of transected right hypoglossal nerve axons, with those of porcine dermis, bovine dermal aterocollagen, and autologous nerve bundles. 2. To assess the survival of neurones, the size of neuronal cell body, and number of motoneurones were determined in the absence of any bridged material and in the presence of porcine dermis, bovine dermal aterocollagen, chitin, or autologous nerve bundles as a bridge. 3. Our results revealed a significantly better outcome in chitin and autologous nerve bridged groups; the size of neuronal cell body and number of hypoglossal neurones were higher than in the other groups. Chitin also enhanced the regeneration of neurones; the number of horseradish peroxide positive neurones indicative of repaired axonal processes was significantly higher in chitin and autologous nerve-bridged groups than in other groups. 4. Our results demonstrated that the use of chitin sheet or autograft successfully prevented the death of severed neurones and promoted the regeneration of the lesioned nerve. Although the mechanisms underlying the effects of chitin are still unknown, chitin seems to be a potentially useful biocompatible material for nerve repair and regeneration.

journal_name

Cell Mol Neurobiol

journal_title

Cellular and molecular neurobiology

authors

Itoh M,Izumi S,Uemura M,Baba N,Suyama K,Kuga Y,Mizuno A,Nakane PK,Koji T

doi

10.1023/a:1007055626632

subject

Has Abstract

pub_date

2000-10-01 00:00:00

pages

529-40

issue

5

eissn

0272-4340

issn

1573-6830

journal_volume

20

pub_type

杂志文章

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