Similar Datasets
Project description:In order to elucidate molecular mechanisms of noise-induced hearing loss in the cochlea (inner ear), transcriptome of the cochlear sample was analyzed after induction of hearing loss by exposure to intense noise in mice. Cochlear transcriptome was analyzed at 3 hours following the noise exposure.
2020-01-14 | GSE137817 | GEO
Project description:In order to elucidate molecular mechanisms of noise-induced hearing loss and dexamethasone therapy in the cochlea (inner ear), transcriptome of cochlear samples was analyzed after induction of hearing loss by exposure to intense noise in mice. Dexamethasone was intraperitoneally injected immediately following the noise trauma. Cochlear transcriptome was analyzed at 12h and 24h following the noise trauma and dexamethasone administration.
2016-12-03 | GSE85290 | GEO
Project description:The cochlea possesses a robust circadian clock machinery that regulates auditory function. How the cochlear clock is influenced by the circadian system remains unknown. Here we show that cochlear rhythms are system-driven and require local Bmal1 as well as central input from the suprachiasmatic nuclei (SCN). SCN ablations disrupted the circadian expression of the core clock genes in the cochlea. Since the circadian secretion of glucocorticoids (GCs) is controlled by the SCN and that GCs are known to modulate auditory function, we assessed their influence on circadian gene expression. Removal of circulating GCs by adrenalectomy (ADX) did not have a major impact on core clock gene expression in the cochlea. Rather it abolished the transcription of clock-controlled genes involved in inflammation. ADX abolished the known differential auditory sensitivity to day and night noise trauma and prevented the induction of GABA-ergic and glutamate receptors mRNA transcripts. However, these improvements were unrelated to changes at the synaptic level suggesting other cochlear functions may be involved. Due to this circadian regulation of noise sensitivity by GCs, we evaluated the actions of the synthetic glucocorticoid dexamethasone (DEX) at different times of the day. DEX was effective in protecting from acute noise trauma only when administered during daytime, when circulating glucocorticoids are low, indicating that chronopharmacological approaches are important for obtaining optimal treatment strategies for hearing loss. GCs appear as a major regulator of the differential sensitivity to day or night noise trauma, a mechanism likely involving the circadian control of inflammatory responses.
2019-06-15 | GSE88954 | GEO
Project description:Aging, noise exposure, and ototoxic drugs represent the three main causes of SNHL, leading to substantial similarities in pathophysiological characteristics of cochlear degeneration. Although the common molecular mechanisms are widely assumed to underlie these similarities, its validity lacks systematic examination. To address this question, we generated three SNHL mouse models from aging, noise exposure, and cisplatin ototoxicity and constructed gene coexpression networks for the cochlear transcriptome data across different hearing-damaged stages.
2022-02-16 | GSE196870 | GEO
Project description:Six month-old wild type and Igf1 heterozygous mice were exposed to a violet swept sine noise (frequency range 2–20 kHz) at 110 dB SPL for 30 minutes. Cochlear samples were taken at 2 and 24 hours post-noise exposure to study the evolution of the expression of inflammation genes by using PCR arrays and RT-qPCR. Six month-old wild type and Igf1 heterozygous mice not exposed to noise were used as control.
2018-06-30 | GSE116460 | GEO
Project description:Six month-old wild type and Igf1 heterozygous mice were exposed to a violet swept sine noise (frequency range 2–20 kHz) at 110 dB SPL for 30 minutes. Cochlear samples were taken at 2 and 24 hours post-noise exposure to study the evolution of the expression of inflammation genes by using PCR arrays and RT-qPCR. Six month-old wild type and Igf1 heterozygous mice not exposed to noise were used as control.
2017-11-09 | GSE106667 | GEO
Project description:The molecular mechanisms underlying the great differences in susceptibility to noise-induced hearing loss (NIHL) exhibited by both humans and laboratory animals are unknown. Using microarray technology, the present study demonstrates that the effects of noise overexposure on the expression of molecules likely to be important to the development of NIHL differ among inbred mice that have distinctive susceptibilities to NIHL including B6.CAST, 129X1/SvJ, and 129S1/SvImJ. The noise-exposure protocol produced, on average, a permanent loss of about 40 dB in sensitivity for auditory brainstem responses in susceptible B6.CAST mice, but no threshold elevations for the two resistant 129S1/SvImJ and 129X1/SvJ substrains. Measurements of noise-induced gene expression changes 6 h after the noise exposure revealed significant alterations in the expression levels of 48 genes in the resistant mice, while by these same criteria, there were seven differentially expressed genes in the susceptible B6.CAST mice. Differentially expressed genes in both groups of mice included subsets of transcription factors. However, only in the resistant mice was there a significant induction of proteins involved in cell-survival pathways such as HSP70, HSP40, p21, GADD45ï¢, Ier3, and Nfï«ï¢iïº. Moreover, increased expression of three of these factors after noise was confirmed at the protein level. Drastically enhanced HSP70, GADD45ï¢, and p21 immunostaining were detected 6 h after the noise exposure in subsets of cells of the lateral wall, spiral limbus, and organ of Corti as well as in cochlear nerve fibers. Upregulation of these proteins after noise exposure likely contributes to the prevalence of survival cellular pathways and thus to the resistance to NIHL that is characteristic of the 129X1/SvJ mice. Experiment Overall Design: Female 10-wk-old mice of the B6.CAST and 129X1/SvJ strains were divided randomly into non-noise control and noise-exposure groups. The non-noise mice served as controls in the gene-profiling experiments to control for the stress induced by experimenter handling and/or confinement of the mice in the noise-exposure chamber that was not directly related to the noise. This mice were in the noise chamber for a sham exposure. In contrast, the ânoiseâ groups were exposed to a 105-dB SPL, 10-kHz octave band of noise for 1 h and sacrificed 6 h after the exposure. Of each of these major groups, eight mice were used for each of three 129X1/SvJ control and three noise-exposed 129X1/SvJ arrays and two B6.CAST control and two noise-exposed B6.CAST arrays. Consequently within each subgroup the arrays are biological replicates.
2008-10-25 | E-GEOD-8342 | biostudies-arrayexpress
Project description:To investigate which miRNAs regulate the development of tinnitus, we have performed microarray for miRNAs as a discovery platform. The changes in dorsal cochlear nucleus after noise exposure have been suggested to play an important role in the development of tinnitus. This study was performed using 12 week-old-male Sprague-Dawley rats. Based on our previous experiment about the development of tinnitus, we set a time point for harvesting dorsal cochlear nuclei: 3 weeks after the exposure of 6-8 kHz narrow-band noise (110 dB SPL for 2 h) at right side. Eight animals were divided into two experimental groups: tinnitus group showing evidence of tinnitus (n = 5); and non-tinnitus group showing no evidence of tinnitus (n = 3) in the gap pre-pulse inhibition of acoustic startle reflex (GPIAS) recordings. Three animals of each group were anesthetized deeply and euthanized at 3 weeks post noise exposure. Dorsal cochlear nucleus at right side was harvested. Microarray for miRNAs was performed using the Affymetrix miRNA 4.0 microarray. Considering the fold change of normalized signal intensities between tinnitus and non-tinnitus groups, miR-375-3p was selected as the candidate miRNA. This result was validated by quantitative reverse transcription-PCR.
2021-06-02 | GSE172259 | GEO
Project description:CD45+ immune cells from mouse cochlea
| PRJNA702925 | ENA
Project description:The mouse cochlear sensory epithelium proteome has been characterized using FASP combined with GELFrEE and off-line SCX- and WAX-based methods follwed by nano LC-MS/MS. In addition, we utilzed single digestion and double digestion approaches using LysC and trypsin endoproteases. MS data files were processed with MaxQuant (Version 1.2.2.5, Max Planck Institute) and peak list files were searched by MASCOT search engine against the UniProt mouse database containing both forward and reversed protein sequences and common contaminants such as keratin. The initial parent and fragment ion maximum precursors were set to 6 ppm and 0.5 Da, respectively. The search included a fixed modification of carbamidomethyl of cysteine and variable modifications of oxidation of methionine and protein N-terminal acetylation. The minimum peptide length to be considered for identification was 6 amino acids.
2013-06-28 | PXD000231 | Pride