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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Mesenchymal bone marrow stem cells within polyglycolic acid tube observed in vivo after six weeks enhance facial nerve regeneration

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Zabeu Rossi Costa, Heloisa Juliana [1] ; Bento, Ricardo Ferreira [1] ; Salomone, Raquel [1] ; Azzi-Nogueira, Deborah [2] ; Zanatta, Daniela B. [3] ; Costa, Marcio Paulino [4] ; da Silva, Ciro Ferreira [5] ; Strauss, Bryan E. [3] ; Haddad, Luciana A. [2]
Total Authors: 9
[1] Univ Sao Paulo Med Sch, Dept Otorhinolaryngol, Sao Paulo - Brazil
[2] Univ Sao Paulo, Biosci Inst, Dept Genet & Evolutionary Biol, Sao Paulo - Brazil
[3] Univ Sao Paulo Med Sch, Inst Heart, Mol Cardiol Lab LIM13, Viral Vector Lab, Sao Paulo - Brazil
[4] Univ Sao Paulo Med Sch, Dept Plast Surg, Sao Paulo - Brazil
[5] Univ Sao Paulo, Dept Cell & Dev Biol, Inst Biomed Sci, Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Brain Research; v. 1510, p. 10-21, MAY 13 2013.
Web of Science Citations: 24

Autografting is the gold-standard method for facial nerve repair with tissue loss. Its association with high-quality scaffolds and cell implants has disclosed distinct experimental outcomes. The aim of this study was to evaluate the functional and histological effects of bone marrow stem cells (BMSC) combined with polyglycolic acid tube (PGAt) in autografted rat facial nerves. After neurotmesis of the mandibular branch of the rat facial nerve, surgical repair consisted of nerve autografting (groups A-E) contained in pGAT (groups B-E), filled with basement membrane matrix (groups C-E) with undifferentiated BMSC (group D) or Schwann-like cells that had differentiated from BMSC (group E). Axon morphometrics and an objective-compound muscle action potentials (CMAP) analysis were conducted. Immunofluorescence assays were carried out with Schwann cell marker S100 and anti-beta-galactosidase to label exogenous cells. Six weeks after surgery, animals from either cell-containing group had mean CMAP amplitudes significantly higher than control groups. Differently from other groups, facial nerves with Schwann-like cell implants had mean axonal densities within reference values. This same group had the highest mean axonal diameter in distal segments. We observed expression of the reporter gene lacZ in nerve cells in the graft and distally from it in groups D and E. Group-E cells had lacZ coexpressed with S100. In conclusion, regeneration of the facial nerve was improved by BMSC within PGAt in rats, yet Schwann-like cells were associated with superior effects. Accordingly, groups D and E had BMSC integrated in neural tissue with maintenance of former cell phenotype for six weeks. (C) 2013 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 98/14254-2 - The Human Genome Research Center
Grantee:Mayana Zatz
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 08/00972-4 - Poliglicolic acid neurotube and bone marrow-derived cells differentiated in vitro in facial nerve regeneration: experimental study in rats
Grantee:Ricardo Ferreira Bento
Support type: Regular Research Grants
FAPESP's process: 08/00584-4 - Poliglicolic acid neurotube and stem cells in facial nerve regeneration: experimental study in rats
Grantee:Heloísa Juliana Zabeu Rossi Costa
Support type: Scholarships in Brazil - Post-Doctorate