The effects of unilateral cochlear ablation on the expression of vesicular glutamate transporter 1 in the lower auditory pathway of neonatal rats

Publication date: Available online 24 February 2017
Source:Auris Nasus Larynx
Author(s): Hiroki Hasegawa, Miyako Hatano, Hisashi Sugimoto, Makoto Ito, Hiroshi Kawasaki, Tomokazu Yoshizaki
ObjectivesUnilateral cochlear damage has profound effects on the central auditory pathways in the brain.MethodsWe examined the effects of unilateral cochlear ablation on VGLUT1 expression in the cochlear nucleus (CN) and the superior olivary complex (SOC) in neonatal rats.ResultsVGLUT1 expression in the CN subdivisions (the AVCN, the PVCN and the DCN-deep layers) and the SOC (the MnTB, the LSO and the MSO) ipsilateral to the ablated side was significantly suppressed by unilateral cochlear ablation. Interestingly, VGLUT1 expression in the PVCN and the DCN-deep layers contralateral to the ablated side was also reduced.ConclusionOur findings indicate that unilateral cochlear ablation affects VGLUT1 expression in the central auditory pathways not only ipsilateral but also contralateral to the ablated side.



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