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Keywords :
Animals; Brain-Derived Neurotrophic Factor; Cell Survival/drug effects; Ciliary Neurotrophic Factor; Cochlear Nucleus/cytology/drug effects; Hair Cells, Auditory/metabolism; Nerve Growth Factors/biosynthesis/pharmacology; Nerve Tissue Proteins/pharmacology; Neurons/drug effects; Neurotrophin 3; Rats; Rats, Wistar; Spiral Ganglion/cytology/drug effects
Abstract :
[en] Auditory neurons depend upon the integrity of both their peripheral (auditory hair cells) and central (cochlear nucleus) targets for survival. One proposed trophic mechanism is the production of neurotrophin-3 (NT-3) by auditory hair cells. Modiolus-spiral ganglion explants from adult rats that closely mirror cell-cell interactions and in vivo tissue relationships within this ganglion provide a model for testing trophic factors. Brain derived neurotrophic factor (BDNF), NT-3 and ciliary neurotrophic factor (CNTF) were tested for their ability, both individually and in combination, to support neuronal survival. NT-3 was the strongest individual promoter of survival, while CNTF (a cytokine) with NT-3 (a neurotrophin) was the most effective combination for promoting the survival of auditory neurons.
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