PMID: 7538721Jan 1, 1995Paper

Axonal regeneration into chronically denervated distal stump. 2. Active expression of type I collagen mRNA in epineurium

Acta Neuropathologica
J SiironenM Röyttä

Abstract

During the first 2 weeks after an injury to peripheral nerve, endoneurial cells proliferate and express integrin beta 1 and mRNA for collagen types I and III. Clinical results for surgical repair within this time are clearly better than those obtained after delayed (months after original injury) surgery. The question of whether this is due to changes in the proliferative capacity of endoneurial cells or to changes in expression of mRNA for collagen types I and III or integrin beta 1 was studied using rats. The left common peroneal nerve was transected and allowed to degenerate for 3 and 6 months. After these times, the tibial nerve of the same animals were transected, and the fresh proximal stump of the transected tibial nerve was sutured into the chronically denervated distal stump of the common peroneal nerve. At 3 and 6 weeks after the reoperation, samples were collected from the distal stump for morphometry, immunohistochemistry and in situ hybridization. Proliferating cells and Schwann cells were identified by immunohistochemistry. These cells increased markedly in number during the axonal reinnervation. In situ hybridization revealed that in the epineurium and perineurium, which were fibrotic, especially type I but also t...Continue Reading

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Citations

Jan 3, 2001·Muscle & Nerve. Supplement·D W Zochodne
Feb 19, 2016·Journal of Magnetic Resonance Imaging : JMRI·Alain R ViddeleerMatthijs Oudkerk
May 1, 1997·Journal of Neurosurgery·R K NathW C Parks
Oct 18, 2002·Neurosurgery·Holly S Gilmer-HillDavid G Kline
Feb 1, 1997·Molecular Neurobiology·S Y Fu, T Gordon

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