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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Long-Term Spinal Ventral Root Reimplantation, but not Bone Marrow Mononuclear Cell Treatment, Positively Influences Ultrastructural Synapse Recovery and Motor Axonal Regrowth

Texto completo
Autor(es):
Barbizan, Roberta [1] ; Castro, Mateus V. [1] ; Ferreira, Jr., Rui Seabra [2] ; Barraviera, Benedito [2] ; Oliveira, Alexandre L. R. [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Campinas UNICAMP, Dept Struct & Funct Biol, BR-13083970 Campinas, SP - Brazil
[2] Sao Paulo State Univ UNESP, Ctr Study Venoms & Venomous Anim CEVAP, BR-18610307 Botucatu, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES; v. 15, n. 11, p. 19535-19551, NOV 2014.
Citações Web of Science: 10
Resumo

We recently proposed a new surgical approach to treat ventral root avulsion, resulting in motoneuron protection. The present work combined such a surgical approach with bone marrow mononuclear cells (MC) therapy. Therefore, MC were added to the site of reimplantation. Female Lewis rats (seven weeks old) were subjected to unilateral ventral root avulsion (VRA) at L4, L5 and L6 levels and divided into the following groups (n = 5 for each group): Avulsion, sealant reimplanted roots and sealant reimplanted roots plus MC. After four weeks and 12 weeks post-surgery, the lumbar intumescences were processed by transmission electron microscopy, to analyze synaptic inputs to the repaired a motoneurons. Also, the ipsi and contralateral sciatic nerves were processed for axon counting and morphometry. The ultrastructural results indicated a significant preservation of inhibitory pre-synaptic boutons in the groups repaired with sealant alone and associated with MC therapy. Moreover, the average number of axons was higher in treated groups when compared to avulsion only. Complementary to the fiber counting, the morphometric analysis of axonal diameter and ``g{''} ratio demonstrated that root reimplantation improved the motor component recovery. In conclusion, the data herein demonstrate that root reimplantation at the lesion site may be considered a therapeutic approach, following proximal lesions in the interface of central nervous system (CNS) and peripheral nervous system (PNS), and that MC therapy does not further improve the regenerative recovery, up to 12 weeks post lesion. (AU)

Processo FAPESP: 09/53846-9 - EMU: aquisição de cromatógrafo líquido de alta eficiência (CLAE) preparativo para purificação e isolamento de serinoproteinases para produção do selante de fibrina
Beneficiário:Benedito Barraviera
Linha de fomento: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
Processo FAPESP: 14/06892-3 - Utilização de células tronco mesenquimais na interface do sistema nervoso central e periférico: reparo de lesões proximais
Beneficiário:Alexandre Leite Rodrigues de Oliveira
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 11/23236-4 - Toxinas animais nativas e recombinantes: análise funcional, estrutural e molecular
Beneficiário:Suely Vilela
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 12/08101-8 - Imageamento in vivo da regeneração nervosa após reimplante de raízes motoras com selante de fibrina fluo-marcado associado com células tronco mesenquimais
Beneficiário:Rui Seabra Ferreira Junior
Linha de fomento: Auxílio à Pesquisa - Regular