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Noise. Hearing loss. Noise exposure.

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https://www.readbyqxmd.com/read/28806500/doxepin-mitigates-noise-induced-neuronal-damage-in-primary-auditory-cortex-of-mice-via-suppression-of-acid-sphingomyelinase-ceramide-pathway
#1
Yu-Ting Su, Xing-Xing Meng, Xi Zhang, Yi-Bin Guo, Hai-Jun Zhang, Yao-Ping Cheng, Xiao-Ping Xie, Yao-Ming Chang, Jun-Xiang Bao
Neuronal damage in primary auditory cortex (A1) underlies complex manifestations of noise exposure, prevention of which is critical for health maintenance. Acid sphingomyelinase (ASM) catalyzes generation of ceramide (Cer) which if over-activated mediates neuronal disorders in various diseases. Tricyclic antidepressants (TCAs), by restraining ASM/Cer, benefits multiple neuronal anomalies, so we aimed to elucidate the effect of TCA on noise induced hearing loss and auditory cortex derangement, unraveling mechanism involved...
August 14, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28758056/single-cell-transcriptome-analysis-of-developing-and-regenerating-spiral-ganglion-neurons
#2
Kelvin Y Kwan
The spiral ganglion neurons (SGNs) of the cochlea are essential for our ability to hear. SGN loss after exposure to ototoxic drugs or loud noise results in hearing loss. Pluripotent stem cell-derived and endogenous progenitor cell types have the potential to become SGNs and are cellular foundations for replacement therapies. Repurposing transcriptional regulatory networks to promote SGN differentiation from progenitor cells is a strategy for regeneration. Advances in the Fludigm C1 workflow or Drop-seq allow sequencing of single cell transcriptomes to reveal variability between cells...
October 2016: Current Pharmacology Reports
https://www.readbyqxmd.com/read/28750123/prevalence-of-hearing-loss-in-us-children-and-adolescents-findings-from-nhanes-1988-2010
#3
Brooke M Su, Dylan K Chan
Importance: There have been concerns about increasing levels of hearing impairment in children and adolescents, especially in relation to noise exposure, because even mild levels of hearing loss can affect educational outcomes. Objective: To further characterize changes in prevalence of hearing loss and noise exposures in the US pediatric population over time. Design, Setting, and Participants: This is a retrospective analysis of demographic and audiometric data from the Third National Health and Nutrition Examination Survey (NHANES III, 1988-1994), NHANES 2005-2006, NHANES 2007-2008, and NHANES 2009-2010...
July 27, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28747011/bioconversion-of-scutellaria-baicalensis-extract-can-increase-recovery-of-auditory-function-in-a-mouse-model-of-noise-induced-hearing-loss
#4
Isabel Rodriguez, Bin Na Hong, Youn Hee Nam, Eun Young Kim, Geun Ha Park, Min Gun Ji, Tong Ho Kang
In noise-induced hearing loss (NIHL), noise exposure damages cochlear sensory hair cells, which lack the capacity to regenerate. Following noise insult, intense metabolic activity occurs, resulting in a cochlear free radical imbalance. Oxidative stress and antioxidant enzyme alterations, including lipoxygenase upregulation, have been linked to chronic inflammation, which contributes to hearing impairment. We previously proposed Scutellaria baicalensis (SB) extract as an alternative therapeutic for preventing NIHL and attributed its pharmacological effects to baicalein...
September 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28742424/evaluation-of-noise-exposure-secondary-to-wind-noise-in-cyclists
#5
Michael D Seidman, Anna G Wertz, Matthew M Smith, Steve Jacob, Syed F Ahsan
Objective Determine if the noise levels of wind exposure experienced by cyclists reach levels that could contribute to noise-induced hearing loss. Study Design Industrial lab research. Setting Industrial wind tunnel. Subjects and Methods A commercial-grade electric wind tunnel was used to simulate different speeds encountered by a cyclist. A single cyclist was used during the simulation for audiometric measurements. Microphones attached near the ears of the cyclist were used to measure the sound (dB sound pressure level) experienced by the cyclist...
July 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28740322/occupational-hearing-loss-from-non-gaussian-noise
#6
REVIEW
Alice H Suter
Noise levels are truly continuous in relatively few occupations, with some degree of intermittency the most common condition. The sound levels of intermittent noise are often referred to as non-Gaussian in that they are not normally distributed in the time domain. In some conditions, intermittent noise affects the ear differently from continuous noise, and it is this assumption that underlies the selection of the 5-dB exchange rate (ER). The scientific and professional communities have debated this assumption over recent decades...
August 2017: Seminars in Hearing
https://www.readbyqxmd.com/read/28738811/associations-of-genetic-variation-in-casp3-gene-with-noise-induced-hearing-loss-in-a-chinese-population-a-case-control-study
#7
Yinyin Wu, Juntao Ni, Mingjian Qi, Chengjian Cao, Yuxian Shao, Liangwen Xu, Haiyan Ma, Lei Yang
BACKGROUND: Noise-induced hearing loss (NIHL) is a complex disease caused by environmental and genetic risk factors. This study explored the relationship between the genetic variations in the CASP gene and the risk of developing NIHL among Chinese workers exposed to occupational noise. METHODS: A case-control study of 272 NIHL workers and 272 normal-hearing workers matched for age, sex and years of noise exposure was conducted. Fifteen single-nucleotide polymorphisms (SNP) in the CASP1, CASP3, CASP4, CASP5, CASP6, CASP8, CASP9, CASP10 and CASP14 genes were genotyped using the polymerase chain reaction-ligase detection reaction method...
July 24, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28734797/the-effects-of-continuously-acoustical-stress-on-cortisol-in-milkfish-chanos-chanos
#8
Chih An Wei, Tzu Hao Lin, Ruo Dong Chen, Yung-Che Tseng, Yi Ta Shao
Strong underwater acoustic noise has been known that may cause hearing loss and actual stress in teleost. However, the long-term physiological effects of relatively quiet but continuously noise on fish were less understood. In present study, milkfish, Chanos chanos, were exposed to the simulated-wind farm noise either quiet (109dB re 1μPa/125.4Hz; approx. 10-100m distant from the wind farm) or noisy (138dB re 1μPa/125.4Hz; nearby the wind farm) conditions for 24h, 3days and 1week. Comparing to the control group (80dB re 1μPa/125...
July 19, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28727652/surgical-emphysema-following-canalplasty-for-aural-exostoses
#9
Michael C Baxter, Matthew Keller, Anil Shah, Sean Wise
OBJECTIVE: To describe the presentation and management of surgical emphysema involving the temporomandibular joint and deep neck following exostoses removal. PATIENT: A 60-year-old male surfer presented with hearing loss and recurrent infections in the right ear. An examination revealed obstructing bony exostoses in the right external auditory canal. He underwent right canalplasty using a postauricular approach. At 5 weeks after surgery, he presented with right otalgia, swelling of the right face and neck, and complaints of a squeaking noise in the right ear with mandibular excursions...
September 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28724501/noise-exposure-alters-long-term-neural-firing-rates-and-synchrony-in-primary-auditory-and-rostral-belt-cortices-following-bimodal-stimulation
#10
Joseph D Takacs, Taylor J Forrest, Gregory J Basura
We previously demonstrated that bimodal stimulation (spinal trigeminal nucleus [Sp5] paired with best frequency tone) altered neural tone-evoked and spontaneous firing rates (SFRs) in primary auditory cortex (A1) 15 min after pairing in guinea pigs with and without noise-induced tinnitus. Neural responses were enhanced (+10 ms) or suppressed (0 ms) based on the bimodal pairing interval. Here we investigated whether bimodal stimulation leads to long-term (up to 2 h) changes in tone-evoked and SFRs and neural synchrony (correlate of tinnitus) and if the long-term bimodal effects are altered following noise exposure...
July 13, 2017: Hearing Research
https://www.readbyqxmd.com/read/28723602/tinnitus-anxiety-depression-and-substance-abuse-in-rock-musicians-a-norwegian-survey
#11
Carl Christian Lein Stormer, Tore Sorlie, Niels Christian Stenklev
OBJECTIVE: Rock musicians are known to have an increased prevalence of hearing loss and tinnitus. The aims of the present study were to examine the distribution of anxiety and depression symptoms among rock musicians with or without tinnitus and how these mental health indicators and internal locus of control influenced upon their tinnitus symptom concerns and the degree to which the tinnitus affected their lives. DESIGN: The study was a questionnairebased cross-sectional survey of subjects selected from a cohort of rock musicians...
June 1, 2017: International Tinnitus Journal
https://www.readbyqxmd.com/read/28716314/safety-and-efficacy-of-ebselen-for-the-prevention-of-noise-induced-hearing-loss-a-randomised-double-blind-placebo-controlled-phase-2-trial
#12
Jonathan Kil, Edward Lobarinas, Christopher Spankovich, Scott K Griffiths, Patrick J Antonelli, Eric D Lynch, Colleen G Le Prell
BACKGROUND: Noise-induced hearing loss is a leading cause of occupational and recreational injury and disease, and a major determinant of age-related hearing loss. No therapeutic agent has been approved for the prevention or treatment of this disorder. In animal models, glutathione peroxidase 1 (GPx1) activity is reduced after acute noise exposure. Ebselen, a novel GPx1 mimic, has been shown to reduce both temporary and permanent noise-induced hearing loss in preclinical studies. We assessed the safety and efficacy of ebselen for the prevention of noise-induced hearing loss in young adults in a phase 2 clinical trial...
July 14, 2017: Lancet
https://www.readbyqxmd.com/read/28712672/noise-induced-cochlear-synaptopathy-in-rhesus-monkeys-macaca-mulatta
#13
M D Valero, J A Burton, S N Hauser, T A Hackett, R Ramachandran, M C Liberman
Cochlear synaptopathy can result from various insults, including acoustic trauma, aging, ototoxicity, or chronic conductive hearing loss. For example, moderate noise exposure in mice can destroy up to ∼50% of synapses between auditory nerve fibers (ANFs) and inner hair cells (IHCs) without affecting outer hair cells (OHCs) or thresholds, because the synaptopathy occurs first in high-threshold ANFs. However, the fiber loss likely impairs temporal processing and hearing-in-noise, a classic complaint of those with sensorineural hearing loss...
July 8, 2017: Hearing Research
https://www.readbyqxmd.com/read/28706081/brief-stimulus-exposure-fully-remediates-temporal-processing-deficits-induced-by-early-hearing-loss
#14
David B Green, Michelle M Mattingly, Yi Ye, Jennifer D Gay, Merri J Rosen
In childhood, partial hearing loss can produce prolonged deficits in speech perception and temporal processing. Early therapeutic interventions targeting temporal processing may improve later speech-related outcomes, however. Gap detection is a measure of auditory temporal resolution that relies on auditory cortex (ACx), and early auditory deprivation alters intrinsic and synaptic properties in ACx. Thus, early deprivation should induce deficits in gap detection, which should be reflected in ACx gap sensitivity...
July 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28705607/noise-induced-hearing-loss-induces-loudness-intolerance-in-a-rat-active-sound-avoidance-paradigm-asap
#15
Senthilvelan Manohar, Jaclyn Spoth, Kelly Radziwon, Benjamin D Auerbach, Richard Salvi
Hyperacusis is a loudness hypersensitivity disorder in which moderate-intensity sounds are perceived as extremely loud, aversive and/or painful. To assess the aversive nature of sounds, we developed an Active Sound Avoidance Paradigm (ASAP) in which rats altered their place preference in a Light/Dark shuttle box in response to sound. When no sound (NS) was present, rats spent more than 95% of the time in the Dark Box versus the transparent Light Box. However, when a 60 or 90 dB SPL noise (2-20 kHz, 2-8 kHz, or 16-20 kHz bandwidth) was presented in the Dark Box, the rats'' preference for the Dark Box significantly decreased...
July 8, 2017: Hearing Research
https://www.readbyqxmd.com/read/28704890/analysis-of-subway-interior-noise-at-peak-commuter-time
#16
Donguk Lee, Gibbeum Kim, Woojae Han
BACKGROUND AND OBJECTIVES: Although mass transit systems are convenient and efficient for urban people, little attention has been paid to the potential hearing hazard from their noise. The purpose of the current study was to measure and analyze levels of subway interior noise at peak commuter times and to provide information about commuters' daily dose of noise exposure. MATERIALS AND METHODS: To measure the subway interior noise, nine subway lines inside Seoul (i...
July 2017: Journal of Audiology & Otology
https://www.readbyqxmd.com/read/28690836/noise-induced-and-age-related-hearing-loss-%C3%A2-new-perspectives-and-potential-therapies
#17
REVIEW
M Charles Liberman
The classic view of sensorineural hearing loss has been that the primary damage targets are hair cells and that auditory nerve loss is typically secondary to hair cell degeneration. Recent work has challenged that view. In noise-induced hearing loss, exposures causing only reversible threshold shifts (and no hair cell loss) nevertheless cause permanent loss of >50% of the synaptic connections between hair cells and the auditory nerve. Similarly, in age-related hearing loss, degeneration of cochlear synapses precedes both hair cell loss and threshold elevation...
2017: F1000Research
https://www.readbyqxmd.com/read/28686713/transcriptome-wide-comparison-of-the-impact-of-atoh1-and-mir-183-family-on-pluripotent-stem-cells-and-multipotent-otic-progenitor-cells
#18
Michael Ebeid, Prashanth Sripal, Jason Pecka, Kirk W Beisel, Kelvin Kwan, Garrett A Soukup
Over 5% of the global population suffers from disabling hearing loss caused by multiple factors including aging, noise exposure, genetic predisposition, or use of ototoxic drugs. Sensorineural hearing loss is often caused by the loss of sensory hair cells (HCs) of the inner ear. A barrier to hearing restoration after HC loss is the limited ability of mammalian auditory HCs to spontaneously regenerate. Understanding the molecular mechanisms orchestrating HC development is expected to facilitate cell replacement therapies...
2017: PloS One
https://www.readbyqxmd.com/read/28685503/interventions-to-prevent-occupational-noise-induced-hearing-loss
#19
REVIEW
Christina Tikka, Jos H Verbeek, Erik Kateman, Thais C Morata, Wouter A Dreschler, Silvia Ferrite
BACKGROUND: This is the second update of a Cochrane Review originally published in 2009. Millions of workers worldwide are exposed to noise levels that increase their risk of hearing disorders. There is uncertainty about the effectiveness of hearing loss prevention interventions. OBJECTIVES: To assess the effectiveness of non-pharmaceutical interventions for preventing occupational noise exposure or occupational hearing loss compared to no intervention or alternative interventions...
July 7, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28635495/analysis-of-audiometric-notch-as-a-noise-induced-hearing-loss-phenotype-in-us-youth-data-from-the-national-health-and-nutrition-examination-survey-2005-2010
#20
Ishan S Bhatt, O'neil Guthrie
OBJECTIVE: Bilateral audiometric notch (BN) at 4000-6000 Hz was identified as a noise-induced hearing loss (NIHL) phenotype for genetic association analysis in college-aged musicians. This study analysed BN in a sample of US youth. DESIGN: Prevalence of the BN within the study sample was determined and logistic-regression analyses were performed to identify audiologic and other demographic factors associated with BN. Computer-simulated "flat" audiograms were used to estimate potential influence of false-positive rates in estimating the prevalence of the BN...
February 8, 2017: International Journal of Audiology
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