The Action of Topical Basic Fibroblast Growth Factor in Facial Nerve Regeneration

The Action of Topical Basic Fibroblast Growth Factor in Facial Nerve Regeneration

Author Toledo, Ronaldo N. Autor UNIFESP Google Scholar
Borin, Andrei Autor UNIFESP Google Scholar
Cruz, Oswaldo L. M. Autor UNIFESP Google Scholar
Ho, Paulo L. Google Scholar
Testa, Jose R. G. Autor UNIFESP Google Scholar
Fukuda, Yotaka Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Butantan Inst
Abstract Objective: To analyze the influence of the topical use of basic fibroblast growth factor ( bFGF) in the regeneration of the facial nerve in rats.Study Design: Experimental study.Materials and Methods: Twenty-eight Wistar adult male rats underwent complete section of the facial nerve trunk, followed by end-to-end anastomosis with epineural sutures. An osmotic minipump equipped with a delivery catheter was implanted subcutaneously near the neural anastomosis. During the subsequent 14 days, 14 animals received a solution containing 25 mu g/ml of bFGF, 250 UI/ml of sodium heparin, and 1,000 mu g/ml of human albumin diluted in Ringer lactate, and 14 animals received a control solution of the same components without bFGF. To evaluate facial nerve regeneration, the number of myelinated fibers evident on histologic sections was counted days ( 7 experimental and 6 control animals) after surgery, and the facial movements of vibrissae and the blink reflex were evaluated on alternate days until the 28th day.Results: On histologic evaluation, the number of myelinated fibers was similar between groups on the 14th day and greater in the group that received bFGF on the 28th day. Behavioral evaluation showed that the animals of the bFGF group presented better functional results between the 6th and 16th days for the blink test and the 14th to the 16th days for vibrissae movements.Conclusion: This study showed that the regeneration of the facial nerve occurred earlier and resulted in significantly more myelinated nerve fibers in the animals that received topical bFGF.
Keywords Facial nerve
Fibroblast growth factor 2
Nerve regeneration
Rats
Language English
Date 2010-04-01
Published in Otology & Neurotology. Philadelphia: Lippincott Williams & Wilkins, v. 31, n. 3, p. 498-505, 2010.
ISSN 1531-7129 (Sherpa/Romeo, impact factor)
Publisher Lippincott Williams & Wilkins
Extent 498-505
Origin http://dx.doi.org/10.1097/MAO.0b013e3181c0e7e9
Access rights Closed access
Type Article
Web of Science ID WOS:000276555200020
URI http://repositorio.unifesp.br/handle/11600/32445

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