[In vitro neurite outgrowth induced by BDNF and GDNF in combination with dexamethasone on cultured spiral ganglion cells]. / Neuritenwachstum in vitro durch BDNF und GDNF in Kombination mit Dexamethason auf kultivierte Spiralganglienzellen.
Laryngorhinootologie
; 86(5): 352-7, 2007 May.
Article
en De
| MEDLINE
| ID: mdl-17163378
ABSTRACT
BACKGROUND:
The efficacy of cochlear implant performance depends, among many other factors, on the number of excitable spiral ganglion cells (SGCs) and the nerve-electrode interface. In earlier animal studies it has been demonstrated that neurotrophic factors are effective to improve SGC survival after experimentally induced deafness. With regard to their anti-inflammatoric and anti-proliferative effects, glucocorticoids (e. g. dexamethasone) are potentially interesting therapeutic agents to reduce connective tissue formation around the inserted electrode. The biological effects of a combined intervention of neurotrophic factors with steroids on SGCs are unknown. Therefore the objective of the study was to investigate possible trophic or even toxic effects of brain-derived neurotrophic factor (BDNF), glial cell line-derived neurotrophic factor (GDNF) and dexamethasone on neurite outgrowth of cultivated SGCs.METHODS:
By using dissociated postnatal spiral ganglion cells (p3-5) for cultivation in the present study, the influence of the mentioned factors in various concentrations and combinations on neurite outgrowth of SGCs was analysed.RESULTS:
Our results indicate significant trophic effects for BDNF (50 ng/ml) and a combination of BDNF with dexamethasone (100 ng/ml) on SGC neurite outgrowth. In contrast, single application of GDNF or dexamethasone in different concentrations caused no significant changes on neurite outgrowth when compared to the control condition.CONCLUSIONS:
Neurite outgrowth induced by neurotrophic factors could not be observed to be reduced when dexamethasone is given at the same time. Therefore the demonstrated results provide a basis for further animal studies in this field of research.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Dexametasona
/
Ganglio Espiral de la Cóclea
/
Neuritas
/
Factor Neurotrófico Derivado del Encéfalo
/
Factor Neurotrófico Derivado de la Línea Celular Glial
/
Glucocorticoides
Límite:
Animals
Idioma:
De
Revista:
Laryngorhinootologie
Asunto de la revista:
OTORRINOLARINGOLOGIA
Año:
2007
Tipo del documento:
Article