Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA97781 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Age-related hearing loss (AHL) is the progressive loss of auditory function with aging. The DBA/2J (DBA) mice have been used as a model of AHL and undergoes progressive, age-related hearing loss by 12 weeks of age. Here we analyzed cochlear gene expression of 7-week-old and 36-week-old DBA mice using microarrays. Auditory brainstem response (ABR) analysis confrimed that severe age-related hearing loss occured in 36-week-old mice, whereas moderate hearing loss occured in 7-week-old mice. Comprehensive gene expression analysis identified genes correlated with AHL and revealeed that 15 mitochondrial process categories, including “mitochondrial electron transport chain”, “oxidative phosphorylation”, “respiratory chain complex I”, “respiratory chain complex IV”, and “respiratory chain complex V”, were statistically associated with AHL-correlated genes in the cochlea of 36-week-old DBA mice, and that 25 genes encoding components of the mitochondrial respiratory chain (respiratory chain complex I, IV, and V) were significantly down-regulated in the cochlea. These observations provide evidence that AHL is associated with down-regulation of genes involved in the mitochondrial respiratory chain in the cochlea of DBA mice, and suggest that mitochondrial respiratory chain dysfunction may be a key feature of AHL in mammalian cochlea. Keywords: Disease state analysis, Time course analysis
2007-10-16 | GSE6045 | GEO
Project description:Age-related hearing loss (AHL) is the progressive loss of auditory function with aging. The DBA/2J (DBA) mice have been used as a model of AHL and undergoes progressive, age-related hearing loss by 12 weeks of age. Here we analyzed cochlear gene expression of 7-week-old and 36-week-old DBA mice using microarrays. Auditory brainstem response (ABR) analysis confrimed that severe age-related hearing loss occured in 36-week-old mice, whereas moderate hearing loss occured in 7-week-old mice. Comprehensive gene expression analysis identified genes correlated with AHL and revealeed that 15 mitochondrial process categories, including â??mitochondrial electron transport chainâ??, â??oxidative phosphorylationâ??, â??respiratory chain complex Iâ??, â??respiratory chain complex IVâ??, and â??respiratory chain complex Vâ??, were statistically associated with AHL-correlated genes in the cochlea of 36-week-old DBA mice, and that 25 genes encoding components of the mitochondrial respiratory chain (respiratory chain complex I, IV, and V) were significantly down-regulated in the cochlea. These observations provide evidence that AHL is associated with down-regulation of genes involved in the mitochondrial respiratory chain in the cochlea of DBA mice, and suggest that mitochondrial respiratory chain dysfunction may be a key feature of AHL in mammalian cochlea. Experiment Overall Design: To determine the effects of age-related hearing loss, each 7-week-old sample (n = 3) was compared to each 36-week-old sample (n = 3), generating a total of nine pairwise comparisons. Using DAVIS and EASE, the identified genes were assign to â??GO: Biological Processâ?? categories of Gene Ontology Consortium. Furthermore, we used EASE to determine the total number of genes that were assigned to each biological process category, and to perform Fisher exact test. Quality control measures were not used. No replicates were done. Dye swap was not used.
2008-06-14 | E-GEOD-6045 | biostudies-arrayexpress
Project description:Treatment of DBA/2J mice with a combination of L-methionine and valproic acid significantly attenuated progressive hearing loss. We examined gene expression in the whole cochlea of the mice. This study was aimed to detect genes of which change in expression levels were associated with attenuation of progressive hearing loss in the mice. DBA/2J mice at 4 weeks old (untreated_4-weeks, N=5), mice treated with control vehicle (0.1M sodium bicarbonate) for 8 weeks (Control_vehicle_12-weeks, N=5), and mice treated with L-methionine and valproic acid (MET_and_VA_12-weeks, N=6) were analyzed.
2015-04-15 | E-GEOD-62173 | biostudies-arrayexpress
Project description:Treatment of DBA/2J mice with a combination of L-methionine and valproic acid significantly attenuated progressive hearing loss. We examined gene expression in the whole cochlea of the mice. This study was aimed to detect genes of which change in expression levels were associated with attenuation of progressive hearing loss in the mice.
2015-04-15 | GSE62173 | GEO
Project description:Transcriptome in mice cochlea with age related hearing loss
| PRJNA600057 | ENA
Project description:Presbycusis – age-related hearing loss – is the number one communicative disorder of our aged population. Here we analyzed gene expression for a set of GABA receptors in the cochlea of aging CBA mice using the Affymetrix GeneChip MOE430A. Functional phenotypic hearing measures distortion-product otoacoustic emission (DPOAE) amplitudes (four age groups) were made. The gene expression changes from RMA normalized microarray data (40 replicates) were first subjected to one-way ANOVA, and then linear regression was performed. In addition, the log signal ratio was converted to fold change, and selected gene expression changes were confirmed by relative real-time PCR. Major findings: expression of GABA-A receptor subunit 6was upregulated with age and hearing loss, whereas subunit 1 was repressed. In addition, GABA-A receptor associated protein like-1 and GABA-A receptor associated protein like-2 were strongly downregulated with age and hearing impairment. Lastly, gene expression measures were correlated with pathway/network relationships relevant to the inner ear using Pathway Architect, to identify key pathways consistent with the gene expression changes observed. In the study of expression changes GABA receptors in the in cochlea of young adult and aging presbycusis mice total of forty chips were used. The normal aging mice were in four groups young adults controls with good hearing (8 mice, 8 MOE430A GeneChips), Middle aged group with good hearing ( 17 mice, 17 MOE430A GeneChips), Mild Presbycusis (old) with limited hearing loss (9 mice, 9 MOE430A GeneChips) and Severe Presbycusis (old) (6 mice, 6 MOE430A GeneChips). Each Mice cochlea to each GeneChips, Samples was not pooled. The hearing potential evidence of each mouse is accompanied with each mice DPOAE amplitude.
2013-08-06 | E-GEOD-49543 | biostudies-arrayexpress
Project description:Gene expression within the cochlea of C57BL6j mice was examined. The hypothesis was that there was a genetic component to Age Related Hearing Loss and microarray would be useful in detecting candidate genes.
2012-01-21 | GSE35234 | GEO
Project description:Gene expression within the cochlea of C57BL6j mice was examined. The hypothesis was that there was a genetic component to Age Related Hearing Loss and microarray would be useful in detecting candidate genes. Mice were aged in the laboratory to 4, 15 and 45 weeks of age. The cochlea were removed and pooled into groups of 5 for each age group. Total RNA was extracted and used in the micoroarray analysis. Differential expression was analysed between the different age groups i.e 4 - 15, 4 - 45 and 15 - 45 weeks.
2012-01-21 | E-GEOD-35234 | biostudies-arrayexpress
Project description:To identify which miRNAs are involved in the onset and progression of age-related hearing loss in the mammalian cochlea We used miRNA microarrays to screen miRNAs which exhibit the differential expression in the expressing levels during aging of the cochlea
2013-03-12 | GSE45026 | GEO
Project description:To identify which miRNAs are involved in the onset and progression of age-related hearing loss in the mammalian cochlea We used miRNA microarrays to screen the miRNAs which exhibit the drastic changes in their expressing level during the aging of the cochlea The organ of Corti (OC), the major pathological sites of presbycusis in cochlea, was collected separately at 3 timepoints during the life span. Two strains were selected: C57bl/6j (as accelerated prebycusis model) and CBA/J (as naturally occured presbycusis model). The selected timepoints were: Postnatal 21 days (P21), 3 month (3m) and 9 month (9m) for C57 mice, and P21, 9m, 16m for CBA mice.
2013-03-12 | E-GEOD-45026 | biostudies-arrayexpress