¸ñÀû: Several studies have reported a significant correlation between noise-
induced hearing loss and cognitive decline. However, comprehensive
analyses of this relationship are rare. This study aimed to assess the
influence of hearing impairment on cognitive functions by analyzing
organ samples in the afferent auditory pathway of deafened mice using
mRNA sequencing. ¹æ¹ý:We prepared ten female 12-week-old C57BL/6N mice as the experimental and
control groups in equal numbers. Mice in the experimental group were
deafened with 120 dB sound pressure level (SPL) wideband noise for 2
hours. Cochlea, auditory cortex, and hippocampus were obtained from all
mice. After constructing cDNA libraries for the extracted RNA from the
samples, we performed next-generation sequencing. Subsequently, we
analyzed the results using gene ontologies (GOs) and Kyoto Encyclopedia
of Genes and Genomes (KEGG) pathway databases for differentially
expressed genes (DEGs) of each organ. °á°ú:Our results revealed 102, 89, and 176 DEGs for cochlea, auditory cortex,
and hippocampus, respectively. We identified 294, 203, and 211 GOs; 10,
7, and 17 KEGG pathways in the cochlea, auditory cortex, and
hippocampus, respectively. In the long term (12 weeks) from noise-
induced hearing loss, GOs and KEGG pathways related to apoptosis or
inflammation persisted more actively in the order of hippocampus,
auditory cortex, and cochlea. °á·Ð:This implies that the neurodegenerative effects of noise exposure
persist more longer time in the central regions. |