Microscopic Evidences That Bone Marrow Mononuclear Cell Treatment Improves Sciatic Nerve Regeneration After Neurorrhaphy
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Data
2011-04-01
Autores
Lopes-Filho, Joao D.
Caldas, Heloisa C.
Santos, Fernanda C. A. [UNESP]
Mazzer, Nilton
Simoes, Gustavo F.
Kawasaki-Oyama, Rosa S.
Abbud-Filho, Mario
Oliveira, Alexandre R.
Toboga, Sebastiao R. [UNESP]
Chueire, Alceu G.
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Editor
Wiley-Blackwell
Resumo
Cell therapy constitutes a possibility for improving nerve regeneration, increasing the success of nerve repair. We evaluate the use of mononuclear cells in the regeneration of the sciatic nerve after axotomy followed by end-to-end neurorrhaphy. Forty adult male Wistar rats (250300 g) were divided into four groups: (1) sham, (2) neurorrhaphy: the sciatic nerve was sectioned and repaired using epineural sutures, (3) culture medium: after the suture, received an injection of 10 mu L of culture medium into the nerve, and (4) mononuclear cell: after the suture, a concentration of 3 X 10(6) of mononuclear cell was injected in epineurium region. Mononuclear cells were obtained from the bone marrow aspirates and separated by Ficoll-Hypaque method. The histological analyses were performed at the 4th postoperative day. The sciatic functional index, histological, and morphometric analyzes were used to evaluate nerve regeneration at the 6th postoperative week. Six rats were used for immunohistochemical analysis on the 4th postoperative day. In the group 4, on the fourth day, the histological analysis demonstrated a more accelerated degenerative process and an increase of the neurotrophic factors was observed. In the 6th week, all the morphometric results of the group 4 were statistically better compared with groups 2 and 3. There was a statistically significant improvement in the sciatic functional index for group 4 compared with groups 2 and 3. Mononuclear cells stimulated nerve regeneration, most probably by speeding up the Wallerian degeneration process as well as stimulating the synthesis of neurotrophic factors. Microsc. Res. Tech. 74:355-363, 2011. (C) 2010 Wiley-Liss, Inc.
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Palavras-chave
tissue therapy, nerve regeneration, sciatic nerve, bone marrow, Rat
Como citar
Microscopy Research and Technique. Malden: Wiley-blackwell, v. 74, n. 4, p. 355-363, 2011.