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Jian Wen, Na Duan, Qiang Wang, Gui-Xia Jing, Ying Xiao
PURPOSE: Iatrogenic noise produced by mastoid or craniotomy drills may cause hearing damage, which is induced by the generation of reactive oxygen species (ROS) and the reduction of cochlear blood flow (CoBF). This study investigated whether propofol could reduce noise-induced hearing loss (NIHL) in a guinea pig model. METHODS: Sixty-four male pigmented guinea pigs were randomly and equally divided into 4 groups: control, noise, propofol and propofol+noise. Propofol was infused intravenously for 20 min prior to noise exposure with a loading dose of 5 mg·kg(-1) for 5 min and a maintenance infusion of 20 mg·kg(-1)·h(-1) for 135 min...
December 5, 2016: Brain Research
Su-Hua Sha, Jochen Schacht
Noise-induced hearing loss (NIHL) due to industrial, military, and recreational noise exposure is a major, but also potentially preventable cause of acquired hearing loss. For the United States it is estimated that 26 million people (15% of the population) between the ages of 20 and 69 have a high-frequency NIHL at a detriment to the quality of life of the affected individuals and great economic cost to society. Areas covered: This review outlines the pathology and pathophysiology of hearing loss as seen in humans and animal models...
December 5, 2016: Expert Opinion on Investigational Drugs
Arwa Kurabi, Elizabeth M Keithley, Gary D Housley, Allen F Ryan, Ann C-Y Wong
Exposure to intense sound or noise can result in purely temporary threshold shift (TTS), or leave a residual permanent threshold shift (PTS) along with alterations in growth functions of auditory nerve output. Recent research has revealed a number of mechanisms that contribute to noise-induced hearing loss (NIHL). The principle cause of NIHL is damage to cochlear hair cells and associated synaptopathy. Contributions to TTS include reversible damage to hair cell (HC) stereocilia or synapses, while moderate TTS reflects protective purinergic hearing adaptation...
December 1, 2016: Hearing Research
Arve Lie, Bo Engdahl, Kristian Tambs
OBJECTIVES: The objective of this study has been to test 2 spreadsheet models to compare the observed with the expected hearing loss for a Norwegian reference population. MATERIAL AND METHODS: The prevalence rates of the Norwegian and the National Institute for Occupational Safety and Health (NIOSH) definitions of hearing outcomes were calculated in terms of sex and age, 20-64 years old, for a screened (with no occupational noise exposure) (N = 18 858) and unscreened (N = 38 333) Norwegian reference population from the Nord-Trøndelag Hearing Loss Study (NTHLS)...
November 18, 2016: International Journal of Occupational Medicine and Environmental Health
Pouryaghoub Gholamreza, Ramin Mehrdad, Saeed Pourhosein
OBJECTIVES: After presbycusis, noise exposure is considered the second cause of sensorineural hearing loss. Due to exposure to high-intensity sounds, musicians may be at risk of noise-induced hearing loss (NIHL). Given the importance of good hearing in music career, this study aimed to investigate the frequency of hearing loss and use of protective measures among Iranian musicians. METHODS: In this cross-sectional study, 125 musicians, including 21 women (16.8%) and 104 men (83...
November 16, 2016: Journal of Occupational Health
Qiuhong Xue, Caihong Li, Jia Chen, Hongmei Guo, Dongqing Li, Xianglei Wu
CONTEXT: The audiological features and cochlear morphology of individuals with noise-induced hearing loss (NIHL) are well characterized. However, the molecular processes in the cochlea are not well understood. AIMS: To explore the role of the endoplasmic reticulum stress (ERS) response in the guinea pig model of cochlear damage induced by exposure to intense noise. SETTINGS AND DESIGN: A pilot case-control study. SUBJECTS AND METHODS: Forty-eight guinea pigs were divided into four equal groups...
September 2016: Noise & Health
Tengku Siti Hajar Haryuna, Wibi Riawan, Ardyansyah Nasution, Suprapto Ma'at, Juliandi Harahap, Indri Adriztina
Introduction The structural changes underlying permanent noise-induced hearing loss (NIHL) include loss of the sensory hair cells, damage to their stereocilia, and supporting tissues within the cochlear lateral wall. Objective The objective of this study is to demonstrate curcumin as a safe and effective therapeutic agent in the prevention and treatment for fibroblasts damage within the cochlear supporting tissues and lateral wall through cell death pathway. Methods We divided 24 Rattus norvegicus into 4 groups, Group 1: control; Group 2: noise (+); Group 3: noise (+), 50 mg/day curcumin (+); Group 4: noise (+), 100 mg/day curcumin (+)...
October 2016: International Archives of Otorhinolaryngology
Arve Lie, Bo Engdahl, Howard J Hoffman, Chuan-Ming Li, Kristian Tambs
OBJECTIVES/HYPOTHESIS: To study the prevalence and usefulness of audiometric notches in the diagnosis of noise-induced hearing loss (NIHL). STUDY DESIGN: Audiograms and data on noise exposure from 23,297 men and 26,477 women, aged 20 to 101 years, from the Nord-Trøndelag Hearing Loss Study, 1996-1998. METHODS: The prevalence of four types of audiometric notches (Coles, Hoffman, Wilson) and 4 kHz notch were computed in relation to occupational noise exposure, age, sex, and report of recurrent ear infections...
October 3, 2016: Laryngoscope
Hugo Carlos Pedroso, Cláudia Giglio de Oliveira Gonçalves
Objective: The article aims to analyze the perception and knowledge of health professionals working in primary health care networks in the Municipality of Curitiba - Paraná, regarding the compulsory notification of Induced Hearing Loss Noise (NIHL) in the National Notifiable Diseases Information System (SINAN). Methods: We performed a transversal cohort study in Curitiba, analyzing perception and knowledge of health professionals working in the primary health care networks in the Municipality of Curitiba, regarding the compulsory notification of NIHL in SINAN, from 2007 to 2014, featuring the reported cases and exploring the situational analysis of the NIHL notification, through a questionnaire and a structured news conference...
September 2016: CoDAS
Arve Lie, Marit Skogstad, Torstein Seip Johnsen, Bo Engdahl, Kristian Tambs
OBJECTIVE: The aim of this study was to analyse longitudinal data to assess the risk of noise-induced hearing loss (NIHL) in Norwegian railway workers. DESIGN: Longitudinal. SETTING: A major Norwegian railway company. METHODS: We examined data from the first and last audiograms for the period 1991-2014, from 9640 railway workers with varying occupational noise exposure and with an average observation period of 10 years...
2016: BMJ Open
Joel Lavinsky, Marshall Ge, Amanda L Crow, Calvin Pan, Juemei Wang, Pezhman Salehi, Anthony Myint, Eleazar Eskin, Hooman Allayee, Aldons J Lusis, Rick A Friedman
The discovery of environmentally specific genetic effects is crucial to the understanding of complex traits, such as susceptibility to noise-induced hearing loss (NIHL). We describe the first genome-wide association study (GWAS) for NIHL in a large and well-characterized population of inbred mouse strains, known as the Hybrid Mouse Diversity Panel (HMDP). We recorded auditory brainstem response (ABR) thresholds both pre and post 2-hr exposure to 10-kHz octave band noise at 108 dB sound pressure level in 5-6-wk-old female mice from the HMDP (4-5 mice/strain)...
October 13, 2016: G3: Genes—Genomes—Genetics
Kayla Hill, Hu Yuan, Xianren Wang, Su-Hua Sha
UNLABELLED: Noise-induced hearing loss (NIHL) is a major unresolved public health problem. Here, we investigate pathomechanisms of sensory hair cell death and suggest a novel target for protective intervention. Cellular survival depends upon maintenance of energy homeostasis, largely by AMP-activated protein kinase (AMPK). In response to a noise exposure in CBA/J mice, the levels of phosphorylated AMPKα increased in hair cells in a noise intensity-dependent manner. Inhibition of AMPK via siRNA or the pharmacological inhibitor compound C attenuated noise-induced loss of outer hair cells (OHCs) and synaptic ribbons, and preserved auditory function...
July 13, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Ishan Bhatt, Susan Phillips, Scott Richter, Denise Tucker, Kristine Lundgren, Robin Morehouse, Vincent Henrich
OBJECTIVE: A non-synonymous single nucleotide polymorphism (rs61742642; C to T, P386S) in the ligand-binding domain of human estrogen-related receptor beta (ESRRβ) showed possible association to noise-induced hearing loss (NIHL) in our previous study. DESIGN: This study was conducted to examine the effect of the ESRRβ rs61742642 T variant on temporary threshold shift (TTS). TTS was induced by 10 minutes of exposure to audiometric narrow-band noise centered at 2000 Hz...
October 2016: International Journal of Audiology
Michiel P Peters, Peter Z Feczko, Karel Tsang, Bert van Rietbergen, Jacobus J Arts, Peter J Emans
BACKGROUND: Historically it has been suggested that noise-induced hearing loss (NIHL) affects approximately 50% of the orthopedic surgery personnel. This noise may be partially caused by the use of powered saw systems that are used to make the bone cuts. The first goal was to quantify and compare the noise emission of these different saw systems during total knee arthroplasty (TKA) surgery. A second goal was to estimate the occupational NIHL risk for the orthopedic surgery personnel in TKA surgery by quantifying the total daily noise emission spectrum during TKA surgery and to compare this to the Dutch Occupational Health Organization guidelines...
May 27, 2016: Journal of Arthroplasty
Barak Gordon, Zohar Joachims, Hila Bar Cohen, Alon Grossman, Estela Derazne, Erez Carmon, Michal Zilberberg, Yuval Levy
OBJECTIVE: To investigate the natural history of hearing loss (HL) in Israeli military aviators and its risk factors. METHODS: Audiometric results of aviators with available audiometry at ages 30 and 40 years, and up to their last available audiometry were retrieved. HL DEFINITION: pure-tone threshold (PTT) of 30 dB or higher in at least one frequency in at least one ear, moderate-to-severe (M-S) HL as PTT of 45 dB or higher, and suspected noise-induced HL (NIHL) as HL at 3 to 6 kHz...
July 2016: Military Medicine
Mun Young Chang, Song Yee Han, Hyeon-Cheol Shin, Jang Yul Byun, Yoon Chan Rah, Moo Kyun Park
OBJECTIVE: Noise is one of the most common causes of hearing loss. Approximately 16% of American teenagers (12-19 years) have hearing loss caused by loud noise. The implication of noise-induced hearing loss (NIHL) in teenagers has received increasing attention. Although temporary threshold shift (TTS), a type of NIHL, is a transient hearing loss, it can accelerate age-related hearing loss. Reactive oxygen species are a primary cause of TTS. As the polyphenols from Ecklonia cava are known to have potent antioxidant effects, we investigated the protective effects of a purified polyphenolic extract of Ecklonia cava (PPEE) against TTS in mice...
August 2016: International Journal of Pediatric Otorhinolaryngology
Małgorzata Pawlaczyk-Łuszczyńska, Adam Dudarewicz, Norman Czaja, Alicja Bortkiewicz
BACKGROUND: The aim of the study was to analyze the hearing status of employees of a furniture factory with respect to their exposure to noise and the presence of additional risk factors of noise-induced hearing loss (NIHL). MATERIAL AND METHODS: Noise measurements, questionnaire survey and assessment of hearing, using pure tone audiometry, were carried out in 50 male workers, aged 20-57 years, directly employed in the manufacture of furniture. The actual workers' hearing threshold levels (HTLs) were compared with the predictions calculated according to PN-ISO 1999:2000 based on age, gender and noise exposure...
2016: Medycyna Pracy
Afsaneh Doosti, Yones Lotfi, Enayatollah Bakhshi
Likelihood of developing noise induced hearing loss (NIHL) is affected by some factors such as genes, nutrition and healthy hearing habits. We investigated this study to determine the effect of hyperlipidemia on NIHL. In a case-control study, 144 workers who exposed to continuous noise more than 85 dBA (88-89 dBA) from a textile factory in Tehran were examined. Serum Blood test results as index for dyslipidemi, were collected and audiometry tests were carried out to analyze the association of hyperlipidemian and NIHL...
June 2016: Indian Journal of Otolaryngology and Head and Neck Surgery
Q Y Yang, X R Xu, J Jiao, L H He, S F Yu, G Z Gu, G S Chen, W H Zhou, H Wu, Y H Li
OBJECTIVE: To investigate association between genetic polymorphism in the grainyhead-like 2 gene (GRHL2) and noise-induced hearing loss (NIHL) in the Chinese population. METHODS: A matched case-control association study was employed, In which, 3 790 workers exposed to continuous and steady-state occupational noise in a steel factory participated. The questionnaires were adopted to collect individual features and audiometry tests performed. In the sstudy, 286 subjects were diagnosed as cases, Which were each designated on the basis of the matched criterion, and 286 paired samples were selected finally...
June 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
Patrick Krauss, Konstantin Tziridis, Stefanie Buerbank, Achim Schilling, Holger Schulze
Noise induced hearing loss (NIHL) is a common disease in modern societies and may lead to maladaptations within the auditory system that finally result in subjective tinnitus. Available therapies may only alleviate the symptoms rather than restore normal hearing. In a previous study we demonstrated that the prophylactic application of Ginkgo biloba extract EGb 761® significantly reduces NIHL and tinnitus development in our Mongolian gerbil (Meriones unguiculatus) animal model. Here, we tested whether the application of EGb 761® has beneficial effects after the formation of permanent NIHL and tinnitus...
2016: PloS One
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