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Agnew RJ, Alexander A, Goad C, Pace N, Beel J, Alabaaltahin Y, Denny B. Quantification of suppressor effects on breech and action noise from AR-15 pattern firearms and its implications for the protection of human hearing. J Occup Environ Hyg 2024:1-20. [PMID: 38687778 DOI: 10.1080/15459624.2024.2334288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Noise from firearms is well known to be harmful to human hearing. This problem has been addressed by various military units through the use of muzzle suppressors. However, as suppressor technology has advanced, shooters report hearing the mechanical action of gas-operated semi-automatic rifles (ArmaLite Rifle Model 15 style aka AR-15) as being louder than the suppressed muzzle noise. This study aims to evaluate if harmful noise is present in the shooter's ear, even when impulse noise emanating from the muzzle is suppressed. To characterize the impulse noise of the firearm action caused by the reciprocation of the bolt carrier group (BCG) and subsequent impact when it returns to battery (the forward locked position), the muzzle of a rifle was placed through a constructed plywood wall, and the noise of the action/breech was measured independently from the muzzle noise. This research finds that the impact of the BCG returning to battery (132 dBZ) has the potential to be harmful to the shooter's hearing even when the noise from the muzzle is effectively suppressed.
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Affiliation(s)
- Robert J Agnew
- Fire Protection and Safety Engineering Technology Program, Oklahoma State University, Stillwater, OK, USA
| | - Aaron Alexander
- Mechanical Engineering Technology Program, Oklahoma State University, Stillwater, OK, USA
| | - Carla Goad
- Department of Statistics, Oklahoma State University, Stillwater, OK, USA
| | - Nason Pace
- Fire Protection and Safety Engineering Technology Program, Oklahoma State University, Stillwater, OK, USA
| | - Justin Beel
- Fire Protection and Safety Engineering Technology Program, Oklahoma State University, Stillwater, OK, USA
| | - Yasir Alabaaltahin
- Fire Protection and Safety Engineering Technology Program, Oklahoma State University, Stillwater, OK, USA
| | - Bo Denny
- Fire Protection and Safety Engineering Technology Program, Oklahoma State University, Stillwater, OK, USA
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Williams E, Minesinger K, Gallagher H, Stefanson JR, Bridges N, Jackson N, Stark V, Coto J, Rajguru S, Yankaskas K, Rogers R, Hoffer ME. Examining the utility of near infrared light as pre-exposure therapy to mitigate temporary noise-induced hearing loss in humans. Front Neurol 2024; 15:1366239. [PMID: 38711557 PMCID: PMC11072974 DOI: 10.3389/fneur.2024.1366239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 04/04/2024] [Indexed: 05/08/2024] Open
Abstract
Introduction This study sought to determine the effect of Occupational Safety and Health Administration (OSHA) compliant noise on auditory health and assess whether pre-noise near infrared (NIR) light therapy can mitigate the effects of noise exposure. Methods Over four visits, participants (n = 30, NCT#: 03834714) with normal hearing completed baseline hearing health assessments followed by exposure to open ear, continuous pink noise at 94 dBA for 15 min. Immediately thereafter, post-noise hearing tests at 3000, 4000, and 6000 Hz and distortion product otoacoustic emissions (DPOAEs) were conducted along with the Modified Rhyme Test (MRT), Masking Level Difference Test (MLD), and Fixed Level Frequency Tests (FLFT) [collectively referred to as the Central and Peripheral Auditory Test Battery (CPATB)] to acquire baseline noise sensitivity profiles. Participants were then randomized to either Active or Sham NIR light therapy for 30 min binaurally to conclude Visit 1. Visit 2 (≥24 and ≤ 48 h from Visit 1) began with an additional 30-min session of Active NIR light therapy or Sham followed by repeat CPATB testing and noise exposure. Post-noise testing was again conducted immediately after noise exposure to assess the effect of NIR light therapy. The remaining visits were conducted following ≥2 weeks of noise rest in a cross-over design (i.e., those who had received Active NIR light therapy in Visits 1 and 2 received Sham therapy in Visits 3 and 4). Results Recovery hearing tests and DPOAEs were completed at the end of each visit. Participants experienced temporary threshold shifts (TTS) immediately following noise exposure, with a mean shift of 6.79 dB HL (±6.25), 10.61 dB HL (±6.89), and 7.30 dB HL (±7.25) at 3000, 4000, and 6000 Hz, respectively, though all thresholds returned to baseline at 3000, 4000, and 6000 Hz within 75 min of noise exposure. Paradoxically, Active NIR light therapy threshold shifts were statistically higher than Sham therapy at 3000 Hz (p = 0.04), but no other differences were observed at the other frequencies tested. An age sub-analysis demonstrated that TTS among younger adults were generally larger in the Sham therapy group versus Active therapy, though this was not statistically different. There were no differences in CPATB test results across Active or Sham groups. Finally, we observed no changes in auditory function or central processing following noise exposure, suggestive of healthy and resilient inner ears. Conclusion In this study, locally administered NIR prior to noise exposure did not induce a significant protective effect in mitigating noise-induced TTS. Further exploration is needed to implement effective dosage and administration for this promising otoprotective therapy.
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Affiliation(s)
- Erin Williams
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, United States
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, FL, United States
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, United States
| | - Kayla Minesinger
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, United States
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, United States
| | - Hilary Gallagher
- Air Force Research Laboratory, 711th Human Performance Wing, Airman Systems Directorate, Dayton, OH, United States
| | - J. R. Stefanson
- U.S. Army Aeromedical Research Laboratory, Fort Rucker, AL, United States
| | - Nathaniel Bridges
- Air Force Research Laboratory, 711th Human Performance Wing, Airman Systems Directorate, Dayton, OH, United States
| | - Natalie Jackson
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, United States
| | - Valerie Stark
- University of Miami Miller School of Medicine, Miami, FL, United States
| | - Jennifer Coto
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Suhrud Rajguru
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, United States
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, United States
| | | | - Rick Rogers
- BioInnovations Institute, Natick, MA, United States
| | - Michael E. Hoffer
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, United States
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, FL, United States
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Li D, Wang H, Wang Q. [Research progress in genetics of noise-induced hearing loss]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2024; 38:343-347;353. [PMID: 38563181 DOI: 10.13201/j.issn.2096-7993.2024.04.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Indexed: 04/04/2024]
Abstract
Noise-induced hearing loss(NIHL) is an acquired sensorineural hearing loss induced by long-term noise exposure. The susceptibility of exposed people may vary even in the same noise environment. With the development of sequencing techniques, genes related to oxidative stress, immunoinflammatory, ion homeostasis, energy metabolism, DNA damage repair and other mechanisms in NIHL have been reported continuously. And some genes may interact with noise exposure indexes. In this article, population studies on NIHL-related gene polymorphisms and gene-environment interactions in the past 20 years are reviewed, aimed to providing evidence for the construction of NIHL-related risk prediction models and the formulation of individualized interventions.
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Affiliation(s)
- Danyang Li
- Senior Department of Otolaryngology Head and Neck Surgery,the 6th Medical Center of Chinese PLA General Hospital,Chinese PLA Medical School,Beijing,100853,China
- Nankai University School of Medicine
| | - Hongyang Wang
- Senior Department of Otolaryngology Head and Neck Surgery,the 6th Medical Center of Chinese PLA General Hospital,Chinese PLA Medical School,Beijing,100853,China
- National Clinical Research Center for Otolaryngologic Diseases
| | - Qiuju Wang
- Senior Department of Otolaryngology Head and Neck Surgery,the 6th Medical Center of Chinese PLA General Hospital,Chinese PLA Medical School,Beijing,100853,China
- Nankai University School of Medicine
- National Clinical Research Center for Otolaryngologic Diseases
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Bramati L, Allenstein Gondim LM, Schmidt L, Lüders D, Veríssimo Meira Taveira K, Néron N, Miranda de Araujo C, Bender Moreira de Lacerda A. Effectiveness of educational programs in hearing health: a systematic review and meta-analysis. Int J Audiol 2024:1-12. [PMID: 38411141 DOI: 10.1080/14992027.2024.2313025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 01/26/2024] [Indexed: 02/28/2024]
Abstract
OBJECTIVE To evaluate the effectiveness of hearing health education programs aimed at preventing noise-induced hearing loss (NIHL), of recreational and occupational origin, by means of a systematic review and meta-analysis. DESIGN The search strategy was carried out in on five electronic databases, as well as referrals from experts. The risk of bias was judged, and the random effects meta-analysis was performed. The certainty of the evidence was assessed. STUDY SAMPLE Effectiveness studies that used educational intervention in hearing health and prevention of NIHL were included. RESULTS 42 studies were included. The Dangerous Decibels program was the only one that could be quantitatively analysed and showed improvement in the post-intervention period of up to one week [SMD = 0.60; CI95% = 0.38-0.82; I2 = 92.5%) and after eight weeks [SMD = 0.45; CI95% = 0.26-0.63; I2 = 81.6%) compared to the baseline. The certainty of evidence was judged as very low. CONCLUSIONS The Dangerous Decibels program is effective after eight weeks of intervention. The other programs cannot be quantified. They still present uncertainty about their effectiveness. The level of certainty is still low for this assessment.
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Affiliation(s)
- Luciana Bramati
- Postgraduate Program in Communication Disorders, Universidade Tuiuti do Paraná - UTP- UTP, Curitiba-Paraná, Brazil
| | - Lys Maria Allenstein Gondim
- Postgraduate Program in Communication Disorders, Universidade Tuiuti do Paraná - UTP- UTP, Curitiba-Paraná, Brazil
| | - Lucas Schmidt
- Postgraduate Program in Communication Disorders, Universidade Tuiuti do Paraná - UTP- UTP, Curitiba-Paraná, Brazil
| | - Débora Lüders
- Postgraduate Program in Communication Disorders, Universidade Tuiuti do Paraná - UTP- UTP, Curitiba-Paraná, Brazil
| | - Karinna Veríssimo Meira Taveira
- Department of Morphology- Center of Biosciences, Associated Postgraduate Program in Speech, Language and Hearing Sciences, Federal University of Rio Grande do Norte, Natal, Brazil
- Center for Advanced Studies in Systematic Review and Meta-Analysis - NARSM; NARSM, Curitiba-Paraná, Brazil
| | - Noémi Néron
- Postgraduate Program in Science of Speech-Language and Hearing, École d'Orthophonie et Audiologie, Université de Montreal - UdeM, Montreal, Canada
| | - Cristiano Miranda de Araujo
- Postgraduate Program in Communication Disorders, Universidade Tuiuti do Paraná - UTP- UTP, Curitiba-Paraná, Brazil
- Center for Advanced Studies in Systematic Review and Meta-Analysis - NARSM; NARSM, Curitiba-Paraná, Brazil
| | - Adriana Bender Moreira de Lacerda
- Postgraduate Program in Communication Disorders, Universidade Tuiuti do Paraná - UTP- UTP, Curitiba-Paraná, Brazil
- Postgraduate Program in Science of Speech-Language and Hearing, École d'Orthophonie et Audiologie, Université de Montreal - UdeM, Montreal, Canada
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Yu Q, Liu S, Guo R, Chen K, Li Y, Jiang D, Gong S, Yin L, Liu K. Complete Restoration of Hearing Loss and Cochlear Synaptopathy via Minimally Invasive, Single-Dose, and Controllable Middle Ear Delivery of Brain-Derived Neurotrophic Factor-Poly(dl-lactic acid- co-glycolic acid)-Loaded Hydrogel. ACS Nano 2024; 18:6298-6313. [PMID: 38345574 DOI: 10.1021/acsnano.3c11049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Noise-induced hearing loss (NIHL) often accompanies cochlear synaptopathy, which can be potentially reversed to restore hearing. However, there has been little success in achieving complete recovery of sensorineural deafness using nearly noninvasive middle ear drug delivery before. Here, we present a study demonstrating the efficacy of a middle ear delivery system employing brain-derived neurotrophic factor (BDNF)-poly-(dl-lactic acid-co-glycolic acid) (PLGA)-loaded hydrogel in reversing synaptopathy and restoring hearing function in a mouse model with NIHL. The mouse model achieved using the single noise exposure (NE, 115 dBL, 4 h) exhibited an average 20 dBL elevation of hearing thresholds with intact cochlear hair cells but a loss of ribbon synapses as the primary cause of hearing impairment. We developed a BDNF-PLGA-loaded thermosensitive hydrogel, which was administered via a single controllable injection into the tympanic cavity of noise-exposed mice, allowing its presence in the middle ear for a duration of 2 weeks. This intervention resulted in complete restoration of NIHL at frequencies of click, 4, 8, 16, and 32 kHz. Moreover, the cochlear ribbon synapses exhibited significant recovery, whereas other cochlear components (hair cells and auditory nerves) remained unchanged. Additionally, the cochlea of NE treated mice revealed activation of tropomyosin receptor kinase B (TRKB) signaling upon exposure to BDNF. These findings demonstrate a controllable and minimally invasive therapeutic approach that utilizes a BDNF-PLGA-loaded hydrogel to restore NIHL by specifically repairing cochlear synaptopathy. This tailored middle ear delivery system holds great promise for achieving ideal clinical outcomes in the treatment of NIHL and cochlear synaptopathy.
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Affiliation(s)
- Qianru Yu
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Shengnan Liu
- School of Materials Science and Engineering,Tsinghua University, Beijing 100084, China
| | - Rui Guo
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Kuntao Chen
- School of Materials Science and Engineering,Tsinghua University, Beijing 100084, China
| | - Yang Li
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Dan Jiang
- Hearing Implant Centre, Guy's and St. Thomas NHS Foundation Trust, London SE1 7EH, United Kingdom
- Centre for Craniofacial and Regenerative Biology, King's College London, London SE1 9RT, United Kingdom
| | - Shusheng Gong
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
- Clinical Center for Hearing Loss, Capital Medical University, Beijing 100050, China
| | - Lan Yin
- School of Materials Science and Engineering,Tsinghua University, Beijing 100084, China
| | - Ke Liu
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
- Clinical Center for Hearing Loss, Capital Medical University, Beijing 100050, China
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Bizup B, Brutsaert S, Cunningham CL, Thathiah A, Tzounopoulos T. Cochlear zinc signaling dysregulation is associated with noise-induced hearing loss, and zinc chelation enhances cochlear recovery. Proc Natl Acad Sci U S A 2024; 121:e2310561121. [PMID: 38354264 PMCID: PMC10895357 DOI: 10.1073/pnas.2310561121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 01/08/2024] [Indexed: 02/16/2024] Open
Abstract
Exposure to loud noise triggers sensory organ damage and degeneration that, in turn, leads to hearing loss. Despite the troublesome impact of noise-induced hearing loss (NIHL) in individuals and societies, treatment strategies that protect and restore hearing are few and insufficient. As such, identification and mechanistic understanding of the signaling pathways involved in NIHL are required. Biological zinc is mostly bound to proteins, where it plays major structural or catalytic roles; however, there is also a pool of unbound, mobile (labile) zinc. Labile zinc is mostly found in vesicles in secretory tissues, where it is released and plays a critical signaling role. In the brain, labile zinc fine-tunes neurotransmission and sensory processing. However, injury-induced dysregulation of labile zinc signaling contributes to neurodegeneration. Here, we tested whether zinc dysregulation occurs and contributes to NIHL in mice. We found that ZnT3, the vesicular zinc transporter responsible for loading zinc into vesicles, is expressed in cochlear hair cells and the spiral limbus, with labile zinc also present in the same areas. Soon after noise trauma, ZnT3 and zinc levels are significantly increased, and their subcellular localization is vastly altered. Disruption of zinc signaling, either via ZnT3 deletion or pharmacological zinc chelation, mitigated NIHL, as evidenced by enhanced auditory brainstem responses, distortion product otoacoustic emissions, and number of hair cell synapses. These data reveal that noise-induced zinc dysregulation is associated with cochlear dysfunction and recovery after NIHL, and point to zinc chelation as a potential treatment for mitigating NIHL.
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Affiliation(s)
- Brandon Bizup
- Pittsburgh Hearing Research Center, Department of Otolaryngology, University of Pittsburgh, Pittsburgh, PA 15261
- Department of Neurobiology, University of Pittsburgh, Pittsburgh, PA 15261
| | - Sofie Brutsaert
- Pittsburgh Hearing Research Center, Department of Otolaryngology, University of Pittsburgh, Pittsburgh, PA 15261
| | - Christopher L Cunningham
- Pittsburgh Hearing Research Center, Department of Otolaryngology, University of Pittsburgh, Pittsburgh, PA 15261
- Department of Neurobiology, University of Pittsburgh, Pittsburgh, PA 15261
| | - Amantha Thathiah
- Department of Neurobiology, University of Pittsburgh, Pittsburgh, PA 15261
| | - Thanos Tzounopoulos
- Pittsburgh Hearing Research Center, Department of Otolaryngology, University of Pittsburgh, Pittsburgh, PA 15261
- Department of Neurobiology, University of Pittsburgh, Pittsburgh, PA 15261
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Lee SY, Lee HS, Park MH. Transcriptomic analysis reveals prolonged neurodegeneration in the hippocampus of adult C57BL/6N mouse deafened by noise. Front Neurosci 2024; 18:1340854. [PMID: 38410162 PMCID: PMC10894918 DOI: 10.3389/fnins.2024.1340854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Accepted: 01/25/2024] [Indexed: 02/28/2024] Open
Abstract
Introduction 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. Methods We prepared 10 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 h. 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. Results 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. Discussion This implies that the neurodegenerative effects of noise exposure persist more longer time in the central regions.
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Affiliation(s)
- Sang-Youp Lee
- Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Ho Sun Lee
- Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Otorhinolaryngology, Boramae Medical Center, Seoul Metropolitan Government-Seoul National University, Seoul, Republic of Korea
| | - Min-Hyun Park
- Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Otorhinolaryngology, Boramae Medical Center, Seoul Metropolitan Government-Seoul National University, Seoul, Republic of Korea
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Xu K, Du Y, Xu B, Huang Y, Feng W, Yu D, Chen Y, Wang X. Gelatin-Encapsulated Tetrahedral DNA Nanostructure Enhances Cellular Internalization for Treating Noise-Induced Hearing Loss. Small 2024:e2310604. [PMID: 38329190 DOI: 10.1002/smll.202310604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 12/23/2023] [Indexed: 02/09/2024]
Abstract
Nanoparticle-based drug delivery strategies have emerged as a crucial avenue for comprehensive sensorineural hearing loss treatment. Nevertheless, developing therapy vectors crossing both biological and cellular barriers has encountered significant challenges deriving from various external factors. Herein, the rational integration of gelatin nanoparticles (GNPs) with tetrahedral DNA nanostructures (TDNs) to engineer a distinct drug-delivery nanosystem (designed as TDN@GNP) efficiently enhances the biological permeability and cellular internalization, further resolving the dilemma of noise-induced hearing loss via loading epigallocatechin gallate (EGCG) with anti-lipid peroxidation property. Rationally engineering of TDN@GNP demonstrates dramatic alterations in the physicochemical key parameters of TDNs that are pivotal in cell-particle interactions and promote cellular uptake through multiple endocytic pathways. Furthermore, the EGCG-loaded nanosystem (TDN-EGCG@GNP) facilitates efficient inner ear drug delivery by superior permeability through the biological barrier (round window membrane), maintaining high drug concentration within the inner ear. The TDN-EGCG@GNP actively overcomes the cell membrane, exhibiting hearing protection from noise insults via reduced lipid peroxidation in outer hair cells and spiral ganglion neurons. This work exemplifies how integrating diverse vector functionalities can overcome biological and cellular barriers in the inner ear, offering promising applications for inner ear disorders.
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Affiliation(s)
- Ke Xu
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200100, P. R. China
| | - Yiwei Du
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200100, P. R. China
| | - Baoying Xu
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China
| | - Yuqi Huang
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China
| | - Wei Feng
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China
| | - Dehong Yu
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China
| | - Yu Chen
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China
| | - Xueling Wang
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200100, P. R. China
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Davari MH, Jalalian MT, Mirmohammadi SJ, Shojaoddiny-Ardekani A, Ardakani MP, Mehrparvar AH. Noise-induced Hearing Loss: Continuous versus Impact/impulse Noise. Int J Prev Med 2024; 15:2. [PMID: 38487700 PMCID: PMC10935570 DOI: 10.4103/ijpvm.ijpvm_368_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 08/30/2023] [Indexed: 03/17/2024] Open
Abstract
Background Impact/impulse and continuous noise are two main causes of noise-induced hearing loss (NIHL) in workplaces. The aim of this study was to compare the effects of impulse/impact noise and continuous noise on hearing status. Methods In this study, 259 workers referred to the occupational medicine clinic of Shahid Rahnemoun hospital, Yazd, Iran, entered the study and were divided into two groups: with exposure to impact/impulse noise and with exposure to continuous noise. Hearing thresholds were measured and compared between the two groups by pure-tone audiometry (PTA). The frequency of hearing loss and audiometric notch according to the results of PTA was compared between the two groups. Data were analyzed by SPSS (ver. 16) using Student's t-test, Chi-square test, and Mann-Whitney U test. Results Hearing thresholds were significantly higher at all frequencies in the impact noise group. The hearing threshold at 6000 Hz was higher than other frequencies in both groups. The frequency of hearing loss at high frequencies was higher in the impact group. The frequency of audiometric notch was not significantly different between the two groups. Conclusions The results of this study showed that hearing loss after exposure to impact/impulse noise is probably more frequent and more severe than exposure to continuous noise, but the pattern of hearing loss is similar in both types of noise exposure.
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Affiliation(s)
- Mohammad Hossein Davari
- Industrial Diseases Research Center, ShahidSadoughi University of Medical Sciences, Yazd Province, Iran
| | - Mohammad Taghi Jalalian
- Industrial Diseases Research Center, ShahidSadoughi University of Medical Sciences, Yazd Province, Iran
| | - Seyyed Jalil Mirmohammadi
- Industrial Diseases Research Center, ShahidSadoughi University of Medical Sciences, Yazd Province, Iran
| | | | - Mojgan Piri Ardakani
- Department of Occupational Medicine, ShahidSadoughi University of Medical Sciences, Yazd Province, Iran
| | - Amir Houshang Mehrparvar
- Industrial Diseases Research Center, ShahidSadoughi University of Medical Sciences, Yazd Province, Iran
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Gedik Toker Ö, Kuru E. The effect of occupational exposure to noise and chemical agents on hearing abilities. Arch Environ Occup Health 2024:1-10. [PMID: 38265067 DOI: 10.1080/19338244.2024.2305803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 01/09/2024] [Indexed: 01/25/2024]
Abstract
Exposure to loud noise or chemical agents may cause hearing disorders such as tinnitus and recruitment, known as an increase in the perception of loudness in addition to hearing loss. Our study aims to evaluate the hearing abilities of hairdressers exposed to noise and chemical agents in the working environment. The study included one hundred hairdressers and one hundred participants who do not work as hairdressers or are nonworkers. The participants' demographic characteristics, working conditions, and auditory complaints were questioned, and each participant completed the Speech, Spatial, and Qualities of Hearing Scale (SSQ). A statistically significant difference was found between the two groups in speech perception, spatial perception, hearing quality, and general SSQ scores. Hairdressers' SSQ scores were significantly lower in all sub-dimensions and general scale scores (p < 0.001). The auditory complaints of the hairdressers and the low SSQ scores indicate that exposure to noise and chemical agents affects the hairdressers' hearing system.
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Affiliation(s)
- Özge Gedik Toker
- Department of Audiology, Faculty of Health Sciences, Bezmialem Vakıf University, Istanbul, Turkey
| | - Elif Kuru
- Department of Audiology, Faculty of Health Sciences, Bezmialem Vakıf University, Istanbul, Turkey
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Naicker K. Noise-induced hearing loss and hearing protection: Attitudes at a South African coal mine. S Afr J Commun Disord 2024; 71:e1-e12. [PMID: 38299534 PMCID: PMC10839152 DOI: 10.4102/sajcd.v71i1.966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 08/04/2023] [Accepted: 08/07/2023] [Indexed: 02/02/2024] Open
Abstract
BACKGROUND Negative attitudes and beliefs are major contributing factors to the rising numbers of noise-induced hearing loss (NIHL) cases in coal mines both locally and internationally. International literature confirms limited knowledge surrounding employees' attitudes and beliefs regarding NIHL and hearing protection devices (HPDs), hence the need for the study. OBJECTIVES To ascertain the attitudes and beliefs about NIHL and HPD use among employees at a large scale underground coal mine in Mpumalanga. METHOD A descriptive and exploratory cross-sectional study was conducted using a self-administered questionnaire, developed by the National Institute for Occupational Safety and Health (NIOSH) on Beliefs about Hearing Protection and Hearing Loss (BHPHL). Participants (n = 241) included employees from a coal mine in Mpumalanga, South Africa. RESULTS Out of 241 completed surveys, this study found that 84% were aware of when to replace earmuffs; 95% believed wearing HPDs could prevent hearing loss in noisy environments; 83% felt their hearing was impacted by loud noise. Additionally, 86% mentioned discomfort from earmuff pressure; 95% emphasised HPD importance; and 95% used HPDs around loud sounds. Moreover, 98% knew how to properly wear earplugs, while lower education levels were linked to higher susceptibility to NIHL. CONCLUSION The study identified positive attitudes towards NIHL and HPD use, but existing NIHL cases must be acknowledged. Organisations can use the findings to develop tailored hearing conservation programmes (HCP), including education, involving employees in protection decisions and promoting diligent HPD usage.Contribution: This study contributes to the limited literature on noise perceptions, NIHL, and HPD use in mining, emphasising the impact attitude has on HPD use and assessing the effect of miners NIHL knowledge on compliance. The findings, unique to coal mining, hold significance for enhancing hearing conservation and reducing NIHL.
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Affiliation(s)
- Kavitha Naicker
- School of Health Systems and Public Health, Faculty of Public Health, University of Pretoria, Pretoria.
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12
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Rincon Sabatino S, Sangaletti R, Griswold A, Dietrich WD, King CS, Rajguru SM. Transcriptional response to mild therapeutic hypothermia in noise-induced cochlear injury. Front Neurosci 2024; 17:1296475. [PMID: 38298897 PMCID: PMC10827921 DOI: 10.3389/fnins.2023.1296475] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/18/2023] [Indexed: 02/02/2024] Open
Abstract
Introduction Prevention or treatment for acoustic injury has been met with many translational challenges, resulting in the absence of FDA-approved interventions. Localized hypothermia following noise exposure mitigates acute cochlear injury and may serve as a potential avenue for therapeutic approaches. However, the mechanisms by which hypothermia results in therapeutic improvements are poorly understood. Methods This study performs the transcriptomic analysis of cochleae from juvenile rats that experienced noise-induced hearing loss (NIHL) followed by hypothermia or control normothermia treatment. Results Differential gene expression results from RNA sequencing at 24 h post-exposure to noise suggest that NIHL alone results in increased inflammatory and immune defense responses, involving complement activation and cytokine-mediated signaling. Hypothermia treatment post-noise, in turn, may mitigate the acute inflammatory response. Discussion This study provides a framework for future research to optimize hypothermic intervention for ameliorating hearing loss and suggests additional pathways that could be targeted for NIHL therapeutic intervention.
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Affiliation(s)
| | - Rachele Sangaletti
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Anthony Griswold
- Department of Human Genetics, University of Miami, Coral Gables, FL, United States
| | - W. Dalton Dietrich
- The Miami Project to Cure Paralysis, University of Miami, Coral Gables, FL, United States
| | | | - Suhrud M. Rajguru
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, United States
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
- The Miami Project to Cure Paralysis, University of Miami, Coral Gables, FL, United States
- RestorEar Devices LLC, Bozeman, MT, United States
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13
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Rincon Sabatino S, Rivero A, Sangaletti R, Dietrich WD, Hoffer ME, King CS, Rajguru SM. Targeted therapeutic hypothermia protects against noise induced hearing loss. Front Neurosci 2024; 17:1296458. [PMID: 38292902 PMCID: PMC10826421 DOI: 10.3389/fnins.2023.1296458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/14/2023] [Indexed: 02/01/2024] Open
Abstract
Introduction Exposure to occupational or recreational loud noise activates multiple biological regulatory circuits and damages the cochlea, causing permanent changes in hearing sensitivity. Currently, no effective clinical therapy is available for the treatment or mitigation of noise-induced hearing loss (NIHL). Here, we describe an application of localized and non-invasive therapeutic hypothermia and targeted temperature management of the inner ear to prevent NIHL. Methods We developed a custom-designed cooling neck collar to reduce the temperature of the inner ear by 3-4°C post-injury to deliver mild therapeutic hypothermia. Results This localized and non-invasive therapeutic hypothermia successfully mitigated NIHL in rats. Our results show that mild hypothermia can be applied quickly and safely to the inner ear following noise exposure. We show that localized hypothermia after NIHL preserves residual hearing and rescues noise-induced synaptopathy over a period of months. Discussion This study establishes a minimally-invasive therapeutic paradigm with a high potential for rapid translation to the clinic for long-term preservation of hearing health.
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Affiliation(s)
| | - Andrea Rivero
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, United States
| | - Rachele Sangaletti
- The Miami Project to Cure Paralysis, University of Miami, Coral Gables, FL, United States
| | - W. Dalton Dietrich
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Michael E. Hoffer
- The Miami Project to Cure Paralysis, University of Miami, Coral Gables, FL, United States
| | | | - Suhrud M. Rajguru
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, United States
- The Miami Project to Cure Paralysis, University of Miami, Coral Gables, FL, United States
- RestorEar Devices LLC, Bozeman, MT, United States
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14
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Kornisch M, Barton A, Park H, Lowe R, Ikuta T. Prevalence of hearing loss in college students: a meta-analysis. Front Neurosci 2024; 17:1282829. [PMID: 38249585 PMCID: PMC10796826 DOI: 10.3389/fnins.2023.1282829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 12/04/2023] [Indexed: 01/23/2024] Open
Abstract
Introduction Hearing loss among college students, specifically noise-induced hearing loss (NIHL), appears to be increasing. This may be particularly challenging for this population as college students are required to listen to lectures in classrooms that may have suboptimal listening environments. College-aged musicians are at a particularly high risk due to repeated and extended exposure to loud noise. Therefore, the purpose of the current study was (1) to examine the prevalence of hearing loss in college students and (2) to emphasize the importance of detecting hearing loss at 6,000 Hz. Methods A meta-analysis was conducted using the PRISMA model. The literature search yielded 8 studies (1,950 subjects) that tested hearing loss using an audiogram and Distortion Product Otoacoustic Emissions (DPOAEs). All studies used audiologic tests to detect hearing loss among college students between the ages of 17-35 years. Results Results indicate that the prevalence of hearing loss in college students is 19%. In addition, the prevalence of hearing loss at 6,000 Hz is 85% among student musicians. For this meta-analysis, slight sensorineural hearing loss, or thresholds greater than 20 dB bilaterally or unilaterally, qualified as hearing loss. Discussion Decreased hearing at 6,000 Hz may lead to an individual's inability to hear important environmental factors and high frequency speech sounds. College students without full auditory function at this frequency may have difficulties performing in class based on decreased attention, comprehension, and memory. Although students may not realize the influence of their 6,000 Hz hearing loss or be unaware of its presence, it could significantly change their likelihood to succeed in college. Therefore, implementing a hearing conservation program may be advised for colleges and universities to help prevent hearing loss in students, particularly for collegiate musicians. In addition, it may be beneficial to screen hearing in college students at 6,000 Hz for better detection of hearing loss overall.
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Affiliation(s)
- Myriam Kornisch
- Department of Communication Sciences and Disorders, University of Mississippi, Oxford, MS, United States
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15
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Warren B, Eberl D. What can insects teach us about hearing loss? J Physiol 2024; 602:297-316. [PMID: 38128023 DOI: 10.1113/jp281281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023] Open
Abstract
Over the last three decades, insects have been utilized to provide a deep and fundamental understanding of many human diseases and disorders. Here, we present arguments for insects as models to understand general principles underlying hearing loss. Despite ∼600 million years since the last common ancestor of vertebrates and invertebrates, we share an overwhelming degree of genetic homology particularly with respect to auditory organ development and maintenance. Despite the anatomical differences between human and insect auditory organs, both share physiological principles of operation. We explain why these observations are expected and highlight areas in hearing loss research in which insects can provide insight. We start by briefly introducing the evolutionary journey of auditory organs, the reasons for using insect auditory organs for hearing loss research, and the tools and approaches available in insects. Then, the first half of the review focuses on auditory development and auditory disorders with a genetic cause. The second half analyses the physiological and genetic consequences of ageing and short- and long-term changes as a result of noise exposure. We finish with complex age and noise interactions in auditory systems. In this review, we present some of the evidence and arguments to support the use of insects to study mechanisms and potential treatments for hearing loss in humans. Obviously, insects cannot fully substitute for all aspects of human auditory function and loss of function, although there are many important questions that can be addressed in an animal model for which there are important ethical, practical and experimental advantages.
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Affiliation(s)
- Ben Warren
- Neurogenetics Group, College of Life Sciences, University of Leicester, Leicester, UK
| | - Daniel Eberl
- Department of Biology, University of Iowa, Iowa City, IA, USA
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16
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Wang X, Zheng H, Yang B, Zu M, Wang Z, Zhang J, Zheng F, Yang M, Tong MCF, Zhao L, Bai W. Estrogen as a guardian of auditory health: Tsp1-CD47 axis regulation and noise-induced hearing loss. Climacteric 2023:1-11. [PMID: 38108225 DOI: 10.1080/13697137.2023.2287632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 12/18/2023] [Indexed: 12/19/2023]
Abstract
OBJECTIVES This study aimed to analyze the role of estrogen in noise-induced hearing loss (NIHL) and uncover underlying mechanisms. METHODS An ovariectomized Sprague-Dawley rat model (OVX) was constructed to investigate the hearing threshold and auditory latency before and after noise exposure using the auditory brainstem response (ABR) test. The morphological changes were assessed using immunofluorescence, scanning electron microscopy and transmission electron microscopy. Proteomics and bioinformatics were used to analyze the mechanism. The findings were further verified through western blot and Luminex liquid suspension chip technology. RESULTS After noise exposure, OVX rats exhibited substantially elevated hearing thresholds. A conspicuous delay in ABR wave I latency was observed, alongside increased loss of outer hair cells, severe collapse of stereocilia and pronounced deformation of the epidermal plate. Accordingly, OVX rats with estrogen supplementation exhibited tolerance to NIHL. Additionally, a remarkable upregulation of the thrombospondin 1 (Tsp1)-CD47 axis in OVX rats was discovered and verified. CONCLUSIONS OVX rats were more susceptible to NIHL, and the protective effect of estrogen was achieved through regulation of the Tsp1-CD47 axis. This study presents a novel mechanism through which estrogen regulates NIHL and offers a potential intervention strategy for the clinical treatment of NIHL.
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Affiliation(s)
- X Wang
- Department of Obstetrics and Gynecology, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Beijing, China
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- State Key Lab of Hearing Science, Ministry of Education, Beijing, China
| | - H Zheng
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- State Key Lab of Hearing Science, Ministry of Education, Beijing, China
- Senior Department of Otolaryngology-Head & Neck Surgery, Sixth Medical Center of PLA General Hospital, Beijing, China
| | - B Yang
- Peking University Fifth School of Clinical Medicine, Beijing Hospital, Beijing, China
| | - M Zu
- Institute of Health Service and Transfusion Medicine, Academy of Military Medical Sciences, Beijing, China
| | - Z Wang
- Department of Obstetrics and Gynecology, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Beijing, China
| | - J Zhang
- Department of Obstetrics and Gynecology, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Beijing, China
| | - F Zheng
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- State Key Lab of Hearing Science, Ministry of Education, Beijing, China
- Senior Department of Otolaryngology-Head & Neck Surgery, Sixth Medical Center of PLA General Hospital, Beijing, China
| | - M Yang
- Department of Obstetrics and Gynecology, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Beijing, China
| | - M C F Tong
- Department of Otorhinolaryngology, Head and Neck Surgery, Chinese University of Hong Kong, Hong Kong, China
| | - L Zhao
- National Clinical Research Center for Otolaryngologic Diseases, Beijing, China
- State Key Lab of Hearing Science, Ministry of Education, Beijing, China
- Senior Department of Otolaryngology-Head & Neck Surgery, Sixth Medical Center of PLA General Hospital, Beijing, China
| | - W Bai
- Department of Obstetrics and Gynecology, Peking University Ninth School of Clinical Medicine, Beijing Shijitan Hospital, Beijing, China
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17
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Rikhotso O, Morodi TJ, Masekameni DM. Noise risk assessments within the adequately controlled and reasonably practicable philosophies. Health SA 2023; 28:2457. [PMID: 38204859 PMCID: PMC10778394 DOI: 10.4102/hsag.v28i0.2457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 10/23/2023] [Indexed: 01/12/2024] Open
Abstract
Background The entire risk assessment process is fraught with methodological and technical uncertainties, exacerbated by the introduction in legislation of ambiguous technical terms such as adequately controlled and reasonably practicable. The combination of these factors renders the risk assessment process opaque regarding required employer actions for securing legal compliance within the noise risk assessment context. Aim This study aims to evaluate how companies are applying and interpreting the adequately controlled and reasonably practicable philosophies within the context of hearing conservation programmes (HCPs) and noise risk assessment processes. Setting Four manufacturing and utilities companies. Methods The four companies, selected through convenience sampling, submitted noise risk assessment records for evaluation through document analysis to determine the companies' interpretation of the adequately controlled and reasonably practicable philosophies. Results In the reviewed noise risk assessment records, the adequately controlled and reasonably practicable philosophies were poorly discerned. Specifically, the hierarchical approach for noise control outlined in the noise induced hearing loss regulations, for which the basis for adequately controlled philosophy ensues, remains misinterpreted by employers. Furthermore, cost-benefit analysis, which enables decision-making on the tolerability of risk within the reasonably practicable philosophy, was also omitted in the assessments. Conclusion The adequately controlled and reasonably practicable philosophies were poorly applied and interpreted by the participating companies, to the detriment of tangible noise control. Contribution This study provides insights on company application and interpretation of the adequately controlled and reasonably practicable philosophies, and HCPs, which contributes to inaction on noise control.
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Affiliation(s)
- Oscar Rikhotso
- Department of Environmental Health, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
| | - Thabiso J. Morodi
- Department of Environmental Health, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
| | - Daniel M. Masekameni
- Department of Occupational Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
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18
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Snapp HA, Coto J, Solle NS, Khan U, Millet B, Rajguru SM. Risk-taking propensity as a risk factor for noise-induced hearing loss in the general population. Int J Audiol 2023; 62:1166-1175. [PMID: 36047290 DOI: 10.1080/14992027.2022.2114023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 08/12/2022] [Indexed: 01/14/2023]
Abstract
OBJECTIVES To examine general risk propensity in relation to perceptions of noise, risk behaviour, and hearing loss in the general population. DESIGN Participants completed an online survey using the Amazon Mechanical Turk crowdsourcing platform. STUDY SAMPLE The sample comprised 1274 adults from the United States. RESULTS Higher general risk propensity was associated with an increased likelihood to engage in noise-risk behaviours. Lower general risk propensity was associated with increased knowledge of noise risks and an increased perception of noise as risky. The frequency of self-reported exposures to hazardous noise resulted in estimated annual noise doses exceeding standard hazard limits in 40% of the surveyed population. CONCLUSIONS Results revealed limited knowledge of the risks and associated health consequences of noise exposure in the general population Results of this study suggest a high rate of self-exposure to hazardous noise by the general population. Those with higher general risk propensity are more likely to engage in risky noise behaviour. Risky noise behaviour is associated with age, gender, race, ethnicity, and general risk propensity. Intervention programs to modify risky noise behaviour in the general population should focus on both increasing knowledge and establishing accurate perceptions of risk.
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Affiliation(s)
- Hillary A Snapp
- Department of Otolaryngology, University of Miami, Miami, FL, USA
| | - Jennifer Coto
- Department of Otolaryngology, University of Miami, Miami, FL, USA
| | | | - Uzma Khan
- Department of Marketing, University of Miami, Miami, FL, USA
| | - Barbara Millet
- Department of Interactive Media, University of Miami, Miami, FL, USA
| | - Suhrud M Rajguru
- Department of Otolaryngology, University of Miami, Miami, FL, USA
- Department of Biomedical Engineering, University of Miami, Miami, FL, USA
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19
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Arnold ML, Sanchez VA, Carrasco DN, Martinez D, Dhar S, Stickel A, Perreira KM, Athanasios T, Lee DJ. Risk factors associated with occupational noise-induced hearing loss in the Hispanic community health study/study of Latinos: A cross-sectional epidemiologic investigation. J Occup Environ Hyg 2023; 20:586-597. [PMID: 37615410 DOI: 10.1080/15459624.2023.2250403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
The purpose of this study was to estimate the prevalence of occupational noise exposure and risk factors of occupational noise-induced hearing loss (NIHL) in Hispanic/Latino adults included in the baseline wave of the Hispanic Community Health Study/Study of Latinos collected from 2008 to 2011. Sequential multiple linear regression modeled the relationship between occupational NIHL (defined as a 3-, 4-, 6-kHz pure-tone average [PTA]) and occupation type, self-reported noise exposure, cardiovascular disease (CVD) risk score, and hearing protective device (HPD) use. The final model controlled for sex, age, and recreational noise exposure. Among 12,851 included participants, approximately 40% (n = 5036) reported occupational noise exposure "Sometimes" (up to 50% of the time) or "Frequently" (75-100% of the time). In the final fitted model, longest-held occupation and CVD risk were associated with poorer hearing. Specifically, those in non-skilled, service, skilled, and military/police/other job categories had between 2.07- and 3.29-dB worse PTA than professional/office workers. Additionally, a shift in the CVD risk score category from low to medium was associated with a 2.25- and 8.20-dB worse PTA for medium and high CVD risk, respectively. Age and sex were also significantly associated with poorer hearing, such that men presented with 6.08 dB worse PTA than women, and for every one-year increase in age, PTA increased by 0.62 dB (ps < .001). No interactions were seen between noise*sometimes or frequent exposure to other ototoxic agents and PTA (ps = .33 & .92, respectively). The prevalence of occupational noise exposure was high in this cross-sectional investigation of adults from Hispanic/Latino backgrounds. Findings contribute to the extant literature by demonstrating that risk factors for occupational NIHL in adults from varying Hispanic/Latino backgrounds are consistent with those of other previously studied groups.
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Affiliation(s)
- Michelle L Arnold
- Department of Communication Sciences and Disorders, University of South Florida, Tampa, Florida
| | - Victoria A Sanchez
- Department of Otolaryngology - Head and Neck Surgery, University of South Florida, Morsani College of Medicine, Tampa, Florida
| | | | - Diane Martinez
- Department of Communication Sciences and Disorders, University of South Florida, Tampa, Florida
| | - Sumitrajit Dhar
- School of Communication, Northwestern University, Evanston, Illinois
| | - Ariana Stickel
- Department of Psychology, San Diego State University, San Diego, California
| | - Krista M Perreira
- Department of Health Policy, and Management, University of North Carolina, Chapel Hill, North Carolina
| | - Tsalatsanis Athanasios
- Biostatistics Core, University of South Florida - Morsani College of Medicine, Tampa, Florida
| | - David J Lee
- Miller School of Medicine, University of Miami, Coral Gables, Florida
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Brueck SE, Eisenberg J, Zechmann EL, Murphy WJ, Krieg E, Morata TC. Noise Exposure and Hearing Loss among Workers at a Hammer Forge Company. Semin Hear 2023; 44:485-502. [PMID: 37818145 PMCID: PMC10562057 DOI: 10.1055/s-0043-1769498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2023] Open
Abstract
The National Institute for Occupational Safety and Health (NIOSH) evaluated continuous and impact noise exposures and hearing loss among workers at a hammer forge company. Full-shift personal noise exposure measurements were collected on forge workers across 15 different job titles; impact noise characteristics and one-third octave band noise levels were assessed at the forge hammers; and 4,750 historic audiometric test records for 483 workers were evaluated for hearing loss trends. Nearly all workers' noise exposures exceeded regulatory and/or recommended exposure limits. Workers working in jobs at or near the hammers had full-shift time-weighted average noise exposures above 100 decibels, A-weighted. Impact noise at the hammers reached up to 148 decibels. Analysis of audiometric test records showed that 82% of workers had experienced a significant threshold shift, as defined by NIOSH, and 63% had experienced a standard threshold shift, as defined by the Occupational Safety and Health Administration (OSHA). All workers with an OSHA standard threshold shift had a preceding NIOSH significant threshold shift which occurred, on average, about 7 years prior. This evaluation highlights forge workers' exposures to high levels of noise, including impact noise, and how their hearing worsened with age and length of employment.
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Affiliation(s)
- Scott E. Brueck
- Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Cincinnati, Ohio
| | - Judith Eisenberg
- Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Cincinnati, Ohio
| | - Edward L. Zechmann
- Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Cincinnati, Ohio
| | - William J. Murphy
- Stephenson and Stephenson Research and Consulting, LLC, Batavia, Ohio
| | - Edward Krieg
- Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Cincinnati, Ohio
| | - Thais C. Morata
- Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Cincinnati, Ohio
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21
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Chang YS, Song I, Han J, Choi J, Chan Rah Y. Electrophysiological Changes Associated with the Progression of Noise-Induced Hearing Loss. J Int Adv Otol 2023; 19:485-491. [PMID: 38088321 PMCID: PMC10765233 DOI: 10.5152/iao.2023.231192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 07/20/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND The aim of this study is to evaluate the clinical characteristics and electrophysiological changes in patients with different degrees of noise-induced hearing loss compared with those of normal controls to elucidate the progression of auditory neural damage attributed to noise exposure. METHODS A retrospective cohort study was conducted through a review of the medical records for the patients who presented to a tertiary referral center. Sixty-nine participants were included in the study: 29 had noise-induced hearing loss, and 40 were healthy controls. All the participants underwent electrophysiological tests and pure-tone audiometry. RESULTS Nine patients showed mild hearing loss (mild hearing loss group), while the others showed worse than moderate hearing loss on puretone audiometry (severe hearing loss group). Significantly reduced wave I and V amplitudes of auditory brainstem response were present in both mild and severe hearing loss groups compared to the control group (P -lt; .001 and P=.002, respectively), without significant differences between the mild and severe hearing loss groups. In the multivariate analysis, auditory brainstem response wave V amplitude was negatively associated with auditory brainstem response wave I-V inter-peak latency delay (B=-0.48, P=.02). CONCLUSION The results of the present study confirm the similarity in the electrophysiological characteristics between the mild and severe hearing loss groups. Thus, widespread disruption in the auditory neural conduction could have been established in the early period when the patient developed mild hearing loss following noise exposure.
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Affiliation(s)
- Young-Soo Chang
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Korea University Ansan Hospital, Ansan, Republic of Korea
- Department of Otorhinolaryngology-Head and Neck Surgery, Sanggye Paik Hospital, College of Medicine, Inje University, Seoul, Republic of Korea
| | - Insik Song
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Korea University Ansan Hospital, Ansan, Republic of Korea
| | - JungHyun Han
- Department of Computer Science and Engineering, Korea University College of Informatics, Seoul, Republic of Korea
| | - June Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Korea University Ansan Hospital, Ansan, Republic of Korea
| | - Yoon Chan Rah
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Korea University Ansan Hospital, Ansan, Republic of Korea
- Jenks Vestibular Physiology Lab, Massachusetts Eye and Ear Infirmary, Massachusetts, USA
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22
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Snapp HA, Vanlooy L, Kuzbyt B, Kolberg C, Laffitte-Lopez D, Rajguru S. Peripheral vestibular loss in noise-exposed firefighters. Front Integr Neurosci 2023; 17:1236661. [PMID: 37849955 PMCID: PMC10577377 DOI: 10.3389/fnint.2023.1236661] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 08/25/2023] [Indexed: 10/19/2023] Open
Abstract
Introduction Occupational workers are increasingly aware of the risk of noise overexposure to the auditory system but lack awareness about potential risks to the vestibular system. The purpose of this study was to investigate changes in vestibular end organ function in a known at-risk noise-exposed population, firefighters compared to age- and sex-matched controls using electrophysiologic measures of cervical vestibular evoked myogenic potentials (cVEMP). Methods A cross-sectional observational study compared cVEMP response characteristics in 38 noise-exposed firefighters. Firefighters were grouped by years of exposure in the fire service. The cVEMP responses were compared within firefighter groups and between firefighters and age- and sex-matched controls. Dependent variables included the response characteristics of amplitude, latency and threshold. Results cVEMP response amplitudes were significantly decreased in firefighters compared to their age- and sex-matched controls. Threshold of the cVEMP responses were significantly higher in firefighters compared to controls and firefighters had a higher incidence of absent cVEMP responses compared to controls. Response amplitudes decreased with increasing years in the fire-service at an increased rate compared to their age- and sex-matched controls. Latency of the cVEMP response was not significantly different in firefighters compared to controls. These findings are consistent with both animal and human studies suggesting noise-induced changes in the sacculocollic pathway. Discussion In the absence of any reported vestibular symptoms or auditory indicators of noise-induced hearing loss, these early effects on the vestibular system point to a potential hidden vestibular loss.
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Affiliation(s)
- Hillary Anne Snapp
- Department of Otolaryngology, University of Miami, Miami, FL, United States
| | - Lindsey Vanlooy
- Department of Otolaryngology, University of Miami, Miami, FL, United States
| | - Brianna Kuzbyt
- Department of Otolaryngology, University of Miami, Miami, FL, United States
| | - Courtney Kolberg
- Department of Otolaryngology, University of Miami, Miami, FL, United States
| | | | - Suhrud Rajguru
- Department of Otolaryngology, University of Miami, Miami, FL, United States
- Department of Biomedical Engineering, University of Miami, Miami, FL, United States
- Bruce W. Carter Department of Veterans Affairs Medical Center, Miami, FL, United States
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23
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Haruna K, Salisu AD, Labaran SA, Fufore MB. Prevalence and Pattern of Hearing Loss among Young Adults in Tertiary Institutions with Habitual Headphone/Earphone Usage in Kaduna Metropolis. J West Afr Coll Surg 2023; 13:98-105. [PMID: 38449547 PMCID: PMC10914113 DOI: 10.4103/jwas.jwas_77_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 04/14/2023] [Indexed: 03/08/2024]
Abstract
Background World Health Organisation estimates that 1.1 billion young people worldwide could be at risk of hearing loss due to unsafe listening practises and nearly half of the teenagers and young adults are exposed to unsafe levels of sound from the use of personal audio devices. Aim This study aimed to determine the prevalence and pattern of hearing loss among students with habitual use of headphone/earphone in tertiary institutions in Kaduna. Participants and Methods This was a prospective cross-sectional study of young adults with prolonged headphone/earphone usage in Kaduna and a group of nonheadphone/earphone users matched for age and sex as controls. Ethical approvals were obtained from relevant bodies and informed consent was also obtained from all participants. Data were obtained by clinical interview and audiometric evaluation of the participants and the data obtained were descriptively analysed using SPSS version 20.0. Frequency tables were generated and chi-square test and Student's t test were used to test for a possible association of variables. The level of significance was set at P < 0.05. Results Two hundred and seventy-two prolonged headphone/earphone users with same number of controls participated in this study. The mean age for subjects and controls was 22.6 ± 3.4 and 23.2 ± 4.2, respectively. Using the better hearing ear, 48 and 20 of the subjects and controls, respectively, had hearing loss, giving a prevalence of 17.6% and 7.4% among the subjects and controls, respectively. Of the 48 subjects with hearing loss, 89.6% had a mild hearing loss. Majority, 91.7% had sensorineural hearing loss and the hearing loss was bilateral in all the participants (both subjects and controls). High frequencies were the most affected (64.6%). Conclusion This study revealed that hearing impairment was more common among prolonged headphone/earphone users. In the majority of the prolonged headphone/earphone users, the hearing impairment was bilateral, mild, sensorineural, and mostly affects higher frequencies.
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Affiliation(s)
- Kabir Haruna
- Department of Otorhinolaryngology, Murtala Mohammed Specialist Hospital, Kano, Nigeria
| | - Abubakar Danjuma Salisu
- Department of Otorhinolaryngology, Aminu Kano Teaching Hospital/Bayero University, Kano, Nigeria
| | | | - Mohammed Bello Fufore
- Department of Otorhinolaryngology, Modibbo Adama University Teaching Hospital/Modibbo Adama University, Yola, Nigeria
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Yap KK, Ismail NH, Supramanian RK, Lim YC. Noise-Related Hearing Disorder Among Vector Control Workers in Kuala Lumpur. Cureus 2023; 15:e46965. [PMID: 38022363 PMCID: PMC10640907 DOI: 10.7759/cureus.46965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction Noise-related hearing disorder (NRHD) is the second most common sensorineural hearing loss, right after age-related hearing loss (presbycusis). It is the highest reported occupational disease and a major compensable occupational hazard in Malaysia. With the increase in dengue cases, the need for vector control workers to control the spread of dengue at the expense of being exposed to noisy fogging machines is critical. Methods This was a cross-sectional study of vector control workers conducted by a local authority in Kuala Lumpur. Participants were categorised as either vector control workers who were directly involved in fogging activities or those who were not. A self-administered questionnaire was used to collect sociodemographic, medical and occupational information. NRHD was confirmed by an audiogram test. Results This study found a high prevalence of NRHD among vector control workers exposed to fogging activity (occupational noise hazards), with 51.4% of them experiencing this condition. The predictors of NRHD include fogging status adjusted odds ratio (aOR) 1.94 (95% CI: 1.19 - 3.17), sex 18.28 (95% CI: 2.33 - 143.16) and age 2.03 (95% CI: 1.27 - 3.25). Conclusion The findings of this study imply that vector control workers are at risk of NRHD. The predictors of NRHD are fogging status, sex and age. These findings emphasise the major impact of occupational noise hazards on NRHD and emphasise the importance of addressing this issue to preserve employees' health; especially among male and older employees with chronic noise exposure.
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Affiliation(s)
- Kian Kiong Yap
- Social Preventive Medicine, University Malaya, Kuala Lumpur, MYS
| | | | | | - Yin Cheng Lim
- Social Preventive Medicine, University Malaya, Kuala Lumpur, MYS
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25
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Kennedy CL, Shuster B, Amanipour R, Milon B, Patel P, Elkon R, Hertzano R. Metformin Protects Against Noise-Induced Hearing Loss in Male Mice. Otol Neurotol 2023; 44:956-963. [PMID: 37641232 PMCID: PMC10510802 DOI: 10.1097/mao.0000000000004002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
HYPOTHESIS Metformin treatment will protect mice from noise-induced hearing loss (NIHL). BACKGROUND We recently identified metformin as the top-ranking, Food and Drug Administration-approved drug to counter inner ear molecular changes induced by permanent threshold shift-inducing noise. This study is designed to functionally test metformin as a potential otoprotective drug against NIHL. METHODS Male and female B6CBAF1/J mice were obtained at 7 to 8 weeks of age. A cohort of the females underwent ovariectomy to simulate menopause and eliminate the effect of ovarian-derived estrogens. At 10 weeks of age, mice underwent a permanent threshold shift-inducing noise exposure (102.5 or 105 dB SPL, 8-16 kHz, 2 h). Auditory brainstem response (ABR) thresholds were obtained at baseline, 24 h after noise exposure, and 1 week after noise exposure. Mice were administered metformin (200 mg/kg/d) or a saline control in their drinking water after the baseline ABR and for the remainder of the study. After the 1-week ABR, mice were euthanized and cochlear tissue was analyzed. RESULTS Metformin treatment reduced the 1-week ABR threshold shift at 16 kHz ( p < 0.01; d = 1.20) and 24 kHz ( p < 0.01; d = 1.15) as well as outer hair cell loss in the 32-45.5 kHz range ( p < 0.0001; d = 2.37) in male mice. In contrast, metformin treatment did not prevent hearing loss or outer hair cell loss in the intact or ovariectomized female mice. CONCLUSIONS Metformin exhibits sex-dependent efficacy as a therapeutic for NIHL. These data compel continued investigation into metformin's protective effects and demonstrate the importance of evaluating the therapeutic efficacy of drugs in subjects of both sexes.
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Affiliation(s)
- Catherine L. Kennedy
- Department of Otorhinolaryngology–Head and Neck Surgery, University of Maryland School of Medicine, Baltimore
| | - Benjamin Shuster
- Neurotology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland, USA
| | - Reza Amanipour
- Neurotology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland, USA
| | - Beatrice Milon
- Neurotology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland, USA
| | - Priya Patel
- Department of Otorhinolaryngology–Head and Neck Surgery, University of Maryland School of Medicine, Baltimore
| | - Ran Elkon
- Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ronna Hertzano
- Department of Otorhinolaryngology–Head and Neck Surgery, University of Maryland School of Medicine, Baltimore
- Neurotology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland, USA
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA
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26
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Lin IF, Tsai PJ, Wu JL, Chin WS, Lin CY, Guo YL. The effect of cumulative noise exposure on distortion product otoacoustic emissions. Int J Audiol 2023; 62:886-892. [PMID: 35968641 DOI: 10.1080/14992027.2022.2106450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 07/12/2022] [Accepted: 07/21/2022] [Indexed: 11/05/2022]
Abstract
OBJECTIVE This study aimed to identify the characteristics of distortion product otoacoustic emissions (DPOAEs) that can be used to differentiate noise-induced hearing loss (NIHL) from age-related hearing loss. A potential index to detect NIHL was defined in terms of its susceptibility to cumulative noise exposure but not to age. DESIGN In this cross-sectional cohort study, a job-exposure matrix was used to calculate the cumulative noise exposure. Multivariate linear regression models were used to examine how age and cumulative noise exposure associated with DPOAEs at individual frequencies after adjusting for hypertension, dyslipidaemia, tobacco use and alcohol consumption. STUDY SAMPLE The pure-tone audiometry and DPOAEs data collected from 239 male workers in a steel factory. RESULTS DPOAEs and DPOAE signal-to-noise ratios (SNRs) at all frequencies were found to be correlated with age, and those at 2, 3, 4 and 6 kHz were correlated with both age and noise exposure. The difference between DPOAE SNR at 1 and 3 kHz showed significant correlation with noise exposure but not with age. CONCLUSIONS The results showed that this DPOAE index, the DPOAE SNR at 1 kHz minus the DPOAE SNR at 3 kHz, could add values to audiometric evaluation of NIHL.
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Affiliation(s)
- I-Fan Lin
- Department of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of Occupational Medicine, Shuang Ho Hospital, New Taipei City, Taiwan
| | - Perng-Jy Tsai
- Department of Environment and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Jiunn-Liang Wu
- Department of Otolaryngology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wei-Shan Chin
- Department of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
- School of Nursing, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Cheng-Yu Lin
- Department of Otolaryngology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yue Leon Guo
- Institute of Environmental and Occupational Health Sciences, College of Public Health, National Taiwan University, Taipei, Taiwan
- Department of Environmental and Occupational Medicine, National Taiwan University Hospital, Taipei, Taiwan
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27
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Alberti G, Portelli D, Galletti C. Healthcare Professionals and Noise-Generating Tools: Challenging Assumptions about Hearing Loss Risk. Int J Environ Res Public Health 2023; 20:6520. [PMID: 37569060 PMCID: PMC10418966 DOI: 10.3390/ijerph20156520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 07/20/2023] [Accepted: 08/02/2023] [Indexed: 08/13/2023]
Abstract
Hearing loss is a significant global health concern, affecting billions of people and leading to various physical, mental, and social consequences. This paper focuses on the risk of noise-induced hearing loss (NIHL) among specific healthcare professionals, especially ear surgeons, orthopaedic surgeons, dentists, and dental hygienists, who frequently use noisy instruments in their professions. While studies on these professionals' noise exposure levels are limited, certain conditions and factors could pose a risk to their hearing. Measures such as engineering and administrative controls, regular audiometric testing, and the use of hearing protection devices are crucial in preventing NIHL. Early detection and intervention are also vital to mitigate further damage. This paper proposes the results of a modified screening protocol, including questionnaires, audiometry, and additional diagnostic tests to identify and address potential hearing disorders. Specific healthcare professionals should remain aware of the risks, prioritize hearing protection, and undergo regular monitoring to safeguard their long-term auditory well-being.
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Affiliation(s)
- Giuseppe Alberti
- Department of Adult and Development Age Human Pathology “Gaetano Barresi”, Unit of Otorhinolaryngology, University of Messina, 98125 Messina, Italy;
| | - Daniele Portelli
- Department of Adult and Development Age Human Pathology “Gaetano Barresi”, Unit of Otorhinolaryngology, University of Messina, 98125 Messina, Italy;
- Policlinico G. Martino, Via Consolare Valeria 1, 98125 Messina, Italy
| | - Cosimo Galletti
- Department of Integrated Dentistry, School of Dentistry, Universitat Internacional de Catalunya, Sant Cugat del Vallès, 08017 Barcelona, Spain;
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28
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Le Prell CG. Preclinical prospects of investigational agents for hearing loss treatment. Expert Opin Investig Drugs 2023; 32:685-692. [PMID: 37695693 DOI: 10.1080/13543784.2023.2253141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 08/25/2023] [Indexed: 09/13/2023]
Abstract
INTRODUCTION : Hearing loss has a high prevalence, with aging, noise exposure, ototoxic drug therapies, and genetic mutations being some of the leading causes of hearing loss. Health conditions such as cardiovascular disease and diabetes are associated with hearing loss, perhaps due to shared vascular pathology in the ear and in other tissues. AREAS COVERED : Issues in the design of preclinical research preclude the ability to make comparisons regarding the relative efficacy of different drugs of interest for possible hearing loss prevention or hearing restoration. This has not slowed the advancement of candidate therapeutics into human clinical testing. There is a robust pipeline with drugs that have different mechanisms of action providing diverse candidate therapies and opportunities for combination therapies to be considered. EXPERT OPINION : Much of the preclinical research literature lacks standard study design elements such as dose response testing, and lack of standardization of test protocols significantly limits conclusions regarding relative efficacy. Nonetheless, the many positive results to date have supported translation of preclinical efforts into clinical trials assessing potential human benefits. Approval of the first hearing loss prevention therapeutic is a major success, providing a pathway for other drugs to follow.
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Affiliation(s)
- Colleen G Le Prell
- Department of Speech, Language, and Hearing, University of Texas at Dallas, Richardson, TX, USA
- Callier Center for Communication Disorders, University of Texas at Dallas, Dallas, TX, USA
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29
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Ibrahim BA, Louie JJ, Shinagawa Y, Xiao G, Asilador AR, Sable HJK, Schantz SL, Llano DA. Developmental Exposure to Polychlorinated Biphenyls Prevents Recovery from Noise-Induced Hearing Loss and Disrupts the Functional Organization of the Inferior Colliculus. J Neurosci 2023; 43:4580-4597. [PMID: 37147134 PMCID: PMC10286948 DOI: 10.1523/jneurosci.0030-23.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/20/2023] [Accepted: 04/17/2023] [Indexed: 05/07/2023] Open
Abstract
Exposure to combinations of environmental toxins is growing in prevalence; and therefore, understanding their interactions is of increasing societal importance. Here, we examined the mechanisms by which two environmental toxins, polychlorinated biphenyls (PCBs) and high-amplitude acoustic noise, interact to produce dysfunction in central auditory processing. PCBs are well established to impose negative developmental impacts on hearing. However, it is not known whether developmental exposure to this ototoxin alters the sensitivity to other ototoxic exposures later in life. Here, male mice were exposed to PCBs in utero, and later as adults were exposed to 45 min of high-intensity noise. We then examined the impacts of the two exposures on hearing and the organization of the auditory midbrain using two-photon imaging and analysis of the expression of mediators of oxidative stress. We observed that developmental exposure to PCBs blocked hearing recovery from acoustic trauma. In vivo two-photon imaging of the inferior colliculus (IC) revealed that this lack of recovery was associated with disruption of the tonotopic organization and reduction of inhibition in the auditory midbrain. In addition, expression analysis in the inferior colliculus revealed that reduced GABAergic inhibition was more prominent in animals with a lower capacity to mitigate oxidative stress. These data suggest that combined PCBs and noise exposure act nonlinearly to damage hearing and that this damage is associated with synaptic reorganization, and reduced capacity to limit oxidative stress. In addition, this work provides a new paradigm by which to understand nonlinear interactions between combinations of environmental toxins.SIGNIFICANCE STATEMENT Exposure to common environmental toxins is a large and growing problem in the population. This work provides a new mechanistic understanding of how the prenatal and postnatal developmental changes induced by polychlorinated biphenyls (PCBs) could negatively impact the resilience of the brain to noise-induced hearing loss (NIHL) later in adulthood. The use of state-of-the-art tools, including in vivo multiphoton microscopy of the midbrain helped in identifying the long-term central changes in the auditory system after the peripheral hearing damage induced by such environmental toxins. In addition, the novel combination of methods employed in this study will lead to additional advances in our understanding of mechanisms of central hearing loss in other contexts.
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Affiliation(s)
- Baher A Ibrahim
- Department of Molecular and Integrative Physiology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
| | - Jeremy J Louie
- Department of Molecular and Integrative Physiology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
| | - Yoshitaka Shinagawa
- Department of Molecular and Integrative Physiology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
| | - Gang Xiao
- Department of Molecular and Integrative Physiology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
| | - Alexander R Asilador
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
| | - Helen J K Sable
- The Department of Psychology, The University of Memphis, Memphis, Tennessee 38152
| | - Susan L Schantz
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
- Department of Comparative Biosciences, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
| | - Daniel A Llano
- Department of Molecular and Integrative Physiology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
- Carle Illinois College of Medicine, University of Illinois Urbana-Champaign, Urbana, Illinois 61801
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30
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Xu K, Xu B, Gu J, Wang X, Yu D, Chen Y. Intrinsic mechanism and pharmacologic treatments of noise-induced hearing loss. Theranostics 2023; 13:3524-3549. [PMID: 37441605 PMCID: PMC10334830 DOI: 10.7150/thno.83383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 06/12/2023] [Indexed: 07/15/2023] Open
Abstract
Noise accounts for one-third of hearing loss worldwide. Regretfully, noise-induced hearing loss (NIHL) is deemed to be irreversible due to the elusive pathogenic mechanisms that have not been fully elucidated. The complex interaction between genetic and environmental factors, which influences numerous downstream molecular and cellular events, contributes to the NIHL. In clinical settings, there are no effective therapeutic drugs other than steroids, which are the only treatment option for patients with NIHL. Therefore, the need for treatment of NIHL that is currently unmet, along with recent progress in our understanding of the underlying regulatory mechanisms, has led to a lot of new literatures focusing on this therapeutic field. The emergence of novel technologies that modify local drug delivery to the inner ear has led to the development of promising therapeutic approaches, which are currently under clinical investigation. In this comprehensive review, we focus on outlining and analyzing the basics and potential therapeutics of NIHL, as well as the application of biomaterials and nanomedicines in inner ear drug delivery. The objective of this review is to provide an incentive for NIHL's fundamental research and future clinical translation.
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Affiliation(s)
- Ke Xu
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Ear Institute, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Baoying Xu
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, China
| | - Jiayi Gu
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Ear Institute, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Xueling Wang
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Ear Institute, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Dehong Yu
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, China
| | - Yu Chen
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, China
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31
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Rikhotso O, Morodi TJ, Masekameni DM. Hearing Conservation Programme Costs at Selected South African Companies. Ann Work Expo Health 2023; 67:448-461. [PMID: 36719046 DOI: 10.1093/annweh/wxac097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 12/22/2022] [Indexed: 02/01/2023] Open
Abstract
The Occupational Health and Safety Act 1993 and its attending Regulations in South Africa, require employers to conduct cost analysis studies to inform decision-making related to exposure control for occupational health hazard such as noise. Cost analysis, as per South African National Standard/ISO 31000 risk assessment guideline, is an important input for the decision-making process of the risk management process. The costs of administrating a hearing conservation programme intended to minimise noise-induced hearing loss is an example of a cost analysis. This study enrolled four companies from the South African manufacturing and utilities sectors with the aim of establishing whether cost analysis is included during the noise risk assessment process; and determining administration costs of HCP administration. A HCP cost questionnaire was completed by each company's occupational hygiene professionals and risk officers. None of the companies in the study included cost analysis in their respective risk assessment processes. The overall costs, derived from the HCP cost item questionnaire, was much greater for Company A (4 290 014 Rands) than all of the other companies combined (970 685 Rands). Hearing protection device expenditures across the four companies were the greatest expense, while audiometry was the smallest expense owing to service internalisation. The HCP expenditures are incurred on periodic basis, yearly or biennial, and are internalised in companies as direct costs. Cost analysis can enhance the noise risk assessment process by providing additional input to support the decision-making process related to noise control. This challenges the occupational hygiene profession to pursue new frontiers and decision-making models in the scope of noise risk management, beyond noise measurements and hearing protection device use recommendation.
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Affiliation(s)
- Oscar Rikhotso
- Department of Environmental Health, Faculty of Science, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa
| | - Thabiso John Morodi
- Department of Environmental Health, Faculty of Science, Tshwane University of Technology, Private Bag X680, Pretoria, 0001, South Africa
| | - Daniel Masilu Masekameni
- Occupational Health Division, School of Public Health, University of Witwatersrand, Parktown, 2193, South Africa
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32
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Pisani A, Paciello F, Montuoro R, Rolesi R, Galli J, Fetoni AR. Antioxidant Therapy as an Effective Strategy against Noise-Induced Hearing Loss: From Experimental Models to Clinic. Life (Basel) 2023; 13:life13041035. [PMID: 37109564 PMCID: PMC10144536 DOI: 10.3390/life13041035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/05/2023] [Accepted: 04/11/2023] [Indexed: 04/29/2023] Open
Abstract
Cochlear redox unbalance is the main mechanism of damage involved in the pathogenesis of noise-induced-hearing loss. Indeed, the increased free radical production, in conjunction with a reduced efficacy of the endogenous antioxidant system, plays a key role in cochlear damage induced by noise exposure. For this reason, several studies focused on the possibility to use exogenous antioxidant to prevent or attenuate noise-induce injury. Thus, several antioxidant molecules, alone or in combination with other compounds, have been tested in both experimental and clinical settings. In our findings, we tested the protective effects of several antioxidant enzymes, spanning from organic compounds to natural compounds, such as nutraceuticals of polyphenols. In this review, we summarize and discuss the strengths and weaknesses of antioxidant supplementation focusing on polyphenols, Q-Ter, the soluble form of CoQ10, Vitamin E and N-acetil-cysteine, which showed great otoprotective effects in different animal models of noise induced hearing loss and which has been proposed in clinical trials.
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Affiliation(s)
- Anna Pisani
- Department of Otolaryngology Head and Neck Surgery, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Fabiola Paciello
- Department of Neuroscience, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Raffaele Montuoro
- Department of Otolaryngology Head and Neck Surgery, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Rolando Rolesi
- Department of Otolaryngology Head and Neck Surgery, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Jacopo Galli
- Department of Otolaryngology Head and Neck Surgery, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Anna Rita Fetoni
- Department of Neuroscience, Reproductive Sciences and Dentistry-Audiology Section, University of Naples Federico II, 80131 Naples, Italy
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Cetinbag-Kuzu O, Bahadir H, Guneri EA, Cimrin AH, Kirkim G. The Effect of Noise Exposure on Hearing Function and Vestibular Evoked Myogenic Potentials. Noise Health 2023; 25:71-75. [PMID: 37203123 DOI: 10.4103/nah.nah_74_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023] Open
Abstract
Purpose Exposure to noise can cause damage to both auditory and vestibular systems. The objective of this study is to evaluate how noise exposure affects the hearing and vestibular systems in individuals with noise-induced hearing loss (NIHL). Methods This study included 80 subjects (40 subjects with NIHL, and 40 controls), between 26 and 59 years old. For hearing assessment, pure-tone audiometry, extended high-frequency audiometry, tympanometry, acoustic reflex threshold, and distortion product otoacoustic emission tests were used; for vestibular assessment, the cervical and ocular vestibular evoked myogenic potentials tests were used. Results Statistically significant differences were found between the two groups in 3 to 6 kHz frequency thresholds; in extended high-frequency audiometry tests, there were also significant differences between groups at all frequencies from 9.5 to 16 kHz. The cervical and ocular vestibular evoked myogenic potentials thresholds were significantly higher and N1-P1 amplitudes were significantly lower in the NIHL group. Conclusion Noise can lead to damage to both auditory and vestibular functions. Therefore, audiological assessments and vestibular evoked myogenic potentials could be clinically useful for examining patients with NIHL.
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Affiliation(s)
- Ozgenur Cetinbag-Kuzu
- Dokuz Eylul University, Institute of Health Sciences, Department of Audiology, Izmir; Manchester Centre for Audiology and Deafness (ManCAD), School of Health Sciences, University of Manchester, Manchester, UK, Türkiye
| | - Hande Bahadir
- Dokuz Eylul University, School of Medicine, Department of Respiratory Diseases, Unit of Occupational and Occupational Diseases, Dokuz Eylul University, Izmir, Türkiye
| | - Enis Alpin Guneri
- Dokuz Eylul University Medical Faculty, Department of Otolaryngology Head and Neck Surgery, Izmir, Türkiye
| | - Arif Hikmet Cimrin
- Dokuz Eylul University, School of Medicine, Department of Respiratory Diseases, Unit of Occupational and Occupational Diseases, Dokuz Eylul University, Izmir, Türkiye
| | - Gunay Kirkim
- Dokuz Eylul University Hospital, School of Medicine, Department of Otorhinolaryngology, Unit of Speech, Hearing & Balance, Izmir; Dokuz Eylul University, Department of Audiometry, Vocational Health High School, Izmir, Türkiye
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Manickam V, Gawande DY, Stothert AR, Clayman AC, Batalkina L, Warchol ME, Ohlemiller KK, Kaur T. Macrophages Promote Repair of Inner Hair Cell Ribbon Synapses following Noise-Induced Cochlear Synaptopathy. J Neurosci 2023; 43:2075-2089. [PMID: 36810227 PMCID: PMC10039750 DOI: 10.1523/jneurosci.1273-22.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 02/07/2023] [Accepted: 02/10/2023] [Indexed: 02/23/2023] Open
Abstract
Resident cochlear macrophages rapidly migrate into the inner hair cell synaptic region and directly contact the damaged synaptic connections after noise-induced synaptopathy. Eventually, such damaged synapses are spontaneously repaired, but the precise role of macrophages in synaptic degeneration and repair remains unknown. To address this, cochlear macrophages were eliminated using colony stimulating factor 1 receptor (CSF1R) inhibitor, PLX5622. Sustained treatment with PLX5622 in CX3CR1 GFP/+ mice of both sexes led to robust elimination of resident macrophages (∼94%) without significant adverse effects on peripheral leukocytes, cochlear function, and structure. At 1 day (d) post noise exposure of 93 or 90 dB SPL for 2 hours, the degree of hearing loss and synapse loss were comparable in the presence and absence of macrophages. At 30 d after exposure, damaged synapses appeared repaired in the presence of macrophages. However, in the absence of macrophages, such synaptic repair was significantly reduced. Remarkably, on cessation of PLX5622 treatment, macrophages repopulated the cochlea, leading to enhanced synaptic repair. Elevated auditory brainstem response thresholds and reduced auditory brainstem response Peak 1 amplitudes showed limited recovery in the absence of macrophages but recovered similarly with resident and repopulated macrophages. Cochlear neuron loss was augmented in the absence of macrophages but showed preservation with resident and repopulated macrophages after noise exposure. While the central auditory effects of PLX5622 treatment and microglia depletion remain to be investigated, these data demonstrate that macrophages do not affect synaptic degeneration but are necessary and sufficient to restore cochlear synapses and function after noise-induced synaptopathy.SIGNIFICANCE STATEMENT The synaptic connections between cochlear inner hair cells and spiral ganglion neurons can be lost because of noise over exposure or biological aging. This loss may represent the most common causes of sensorineural hearing loss also known as hidden hearing loss. Synaptic loss results in degradation of auditory information, leading to difficulty in listening in noisy environments and other auditory perceptual disorders. We demonstrate that resident macrophages of the cochlea are necessary and sufficient to restore synapses and function following synaptopathic noise exposure. Our work reveals a novel role for innate-immune cells, such as macrophages in synaptic repair, that could be harnessed to regenerate lost ribbon synapses in noise- or age-linked cochlear synaptopathy, hidden hearing loss, and associated perceptual anomalies.
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Affiliation(s)
- Vijayprakash Manickam
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, Nebraska 68178
| | - Dinesh Y Gawande
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, Nebraska 68178
| | - Andrew R Stothert
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, Nebraska 68178
| | - Anna C Clayman
- Department of Otolaryngology, School of Medicine, Washington University, St. Louis, Missouri 63110
| | - Lyudmila Batalkina
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, Nebraska 68178
| | - Mark E Warchol
- Department of Otolaryngology, School of Medicine, Washington University, St. Louis, Missouri 63110
| | - Kevin K Ohlemiller
- Department of Otolaryngology, School of Medicine, Washington University, St. Louis, Missouri 63110
| | - Tejbeer Kaur
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, Nebraska 68178
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Abstract
Noise-induced hearing loss (NIHL) is the second most common cause of sensorineural hearing loss, after age-related hearing loss, and affects approximately 5% of the world's population. NIHL is associated with substantial physical, mental, social, and economic impacts at the patient and societal levels. Stress and social isolation in patients' workplace and personal lives contribute to quality-of-life decrements which may often go undetected. The pathophysiology of NIHL is multifactorial and complex, encompassing genetic and environmental factors with substantial occupational contributions. The diagnosis and screening of NIHL are conducted by reviewing a patient's history of noise exposure, audiograms, speech-in-noise test results, and measurements of distortion product otoacoustic emissions and auditory brainstem response. Essential aspects of decreasing the burden of NIHL are prevention and early detection, such as implementation of educational and screening programs in routine primary care and specialty clinics. Additionally, current research on the pharmacological treatment of NIHL includes anti-inflammatory, antioxidant, anti-excitatory, and anti-apoptotic agents. Although there have been substantial advances in understanding the pathophysiology of NIHL, there remain low levels of evidence for effective pharmacotherapeutic interventions. Future directions should include personalized prevention and targeted treatment strategies based on a holistic view of an individual's occupation, genetics, and pathology.
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Affiliation(s)
- Nirvikalpa Natarajan
- Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Shelley Batts
- Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Konstantina M. Stankovic
- Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Palo Alto, CA 94304, USA
- Department of Neurosurgery, Stanford University School of Medicine, Palo Alto, CA 94304, USA
- Wu Tsai Neuroscience Institute, Stanford University, Stanford, CA 94305, USA
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Dudarewicz A, Pawlaczyk-Łuszczyńska M, Zaborowski K, Pontoppidan NH, Wolniakowska A, Bramsløw L, Christensen JH, Katrakazas P, Brdaric D, Samardžić S, Śliwińska-Kowalska M. The adaptation of noise-induced temporary hearing threshold shift predictive models for modelling the public health policy. Int J Occup Med Environ Health 2023; 36:125-138. [PMID: 36661863 PMCID: PMC10464745 DOI: 10.13075/ijomeh.1896.01681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 10/31/2022] [Indexed: 01/21/2023] Open
Abstract
OBJECTIVES It has been shown that monitoring temporary threshold shift (TTS) after exposure to noise may have a predictive value for susceptibility of developing permanent noise-induced hearing loss. The aim of this study is to present the assumptions of the TTS predictive model after its verification in normal hearing subjects along with demonstrating the usage of this model for the purposes of public health policy. MATERIAL AND METHODS The existing computational predictive TTS models were adapted and validated in a group of 18 bartenders exposed to noise at the workplace. The performance of adapted TTS predictive model was assessed by receiver operating characteristic (ROC) analysis. The demonstration example of the usage of this model for estimating the risk of TTS in general unscreened population after exposure to loud music in discotheque bars or music clubs is provided. RESULTS The adapted TTS predictive model shows a satisfactory agreement in distributions of actual and predicted TTS values and good correlations between these values in examined bartenders measured at 4 kHz, and as a mean at speech frequencies (0.5-4 kHz). An optimal cut-off level for recognizing the TTS events, ca. 75% of young people (aged ca. 35 years) may experience TTS >5 dB, while <10% may exhibit TTS of 15-18 dB. CONCLUSIONS The final TTS predictive model proposed in this study needs to be validated in larger groups of subjects exposed to noise. Actual prediction of TTS episodes in general populations may become a helpful tool in creating the hearing protection public health policy. Int J Occup Med Environ Health. 2023;36(1):125-38.
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Affiliation(s)
- Adam Dudarewicz
- Nofer Institute of Occupational Medicine, Łódź, Poland (Department of Physical Hazards)
| | | | - Kamil Zaborowski
- Nofer Institute of Occupational Medicine, Łódź, Poland (Department of Physical Hazards)
| | | | - Anna Wolniakowska
- Nofer Institute of Occupational Medicine, Łódź, Poland (Audiology and Phoniatrics Clinic, Department of Audiology and Phoniatrics)
| | - Lars Bramsløw
- Eriksholm Research Centre, Oticon A/S, Snekkersten, Denmark
| | | | | | - Dario Brdaric
- Institute of Public Health for the Osijek Baranya County, Osijek, Croatia (Department for Disinfection, Disinfestation and Deratization)
| | - Senka Samardžić
- Training Institute for Public Health of Osijek-Baranja County, Osijek, Croatia (Department of Public Health)
| | - Mariola Śliwińska-Kowalska
- Nofer Institute of Occupational Medicine, Łódź, Poland (Audiology and Phoniatrics Clinic, Department of Audiology and Phoniatrics)
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Boscoe EF, Banakis Hartl RM, Gubbels SP, Greene NT. Effects of Varying Laser Parameters During Laser Stapedotomy on Intracochlear Pressures. Otolaryngol Head Neck Surg 2023; 168:462-468. [PMID: 35671134 PMCID: PMC10097413 DOI: 10.1177/01945998221104658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 05/13/2022] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Sensorineural hearing loss is a known complication of stapes surgery. We previously showed that laser stapedotomy can result in intracochlear pressures that are comparable to high sound pressure levels. Optimizing laser settings to those that correspond with the lowest pressure changes may mitigate risk for postoperative hearing loss. Here we quantify the effects of various laser parameters on intracochlear pressures and test the hypothesis that intracochlear pressure changes are proportional to the laser energy delivered. STUDY DESIGN Basic and translational science. SETTING Cadaveric dissection and basic science laboratory. METHODS Cadaveric human heads underwent mastoidectomies. Intracochlear pressures were measured via fiber-optic pressure probes placed in scala vestibuli and tympani. Pulses of varied stimulus power and duration from a 980-nm diode laser were applied to the stapes footplate. RESULTS Sustained high-intensity pressures were observed in the cochlea during all laser applications. Observed pressure magnitudes increased monotonically with laser energy and rose linearly for lower stimulus durations and powers, but there was increased variability for laser applications of longer duration (200-300 ms) and/or higher power (8 W). CONCLUSIONS Results confirm that significant pressure changes occur during laser stapedotomy, which we hypothesize may cause injury. Overall energy delivered depends predictably on duration and power, but surgeons should use caution at the highest stimulus levels and longest pulse durations due to the increasing variability in intracochlear pressure under these stimulus conditions. While the risk to hearing from increased intracochlear pressures from laser stapedotomy remains unclear, these results affirm the need to optimize laser settings to avoid unintended injury.
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Affiliation(s)
- Elizabeth F. Boscoe
- Department of Otolaryngology–Head and Neck Surgery, University of Colorado, Aurora, Colorado
| | - Renee M. Banakis Hartl
- Department of Otolaryngology–Head and Neck Surgery, University of Colorado, Aurora, Colorado
- Department of Otolaryngology–Head and Neck Surgery, University of Michigan, Ann Arbor, Michigan
| | - Samuel P. Gubbels
- Department of Otolaryngology–Head and Neck Surgery, University of Colorado, Aurora, Colorado
| | - Nathaniel T. Greene
- Department of Otolaryngology–Head and Neck Surgery, University of Colorado, Aurora, Colorado
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Millet B, Snapp HA, Rajguru SM, Schaefer Solle N. Prevalence of Hearing Loss and Perceptions of Hearing Health and Protection among Florida Firefighters. Int J Environ Res Public Health 2023; 20:3826. [PMID: 36900832 PMCID: PMC10001319 DOI: 10.3390/ijerph20053826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/05/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
Firefighters are exposed to extensive hazardous noise while on the job, both during routine tasks at the station and when responding to calls. However, little is known about firefighters' occupational noise hazards. This study employed mixed methods, including focus groups, a survey, and audiometric testing, to identify sources of noise in the firefighters' work environment, determine hearing protective strategies, discern firefighters' perceptions of occupational noise exposure and impacts to their health, and quantify the prevalence of hearing loss among South Florida firefighters. A total of 6 senior officers served in an expert panel, 12 participated in focus groups, 300 completed the survey, and 214 received audiometric tests. Most firefighters were unaware of the risk and their departments' policies, and did not participate in hearing protection practices and avoided using hearing protection devices, which they believed impede team communication and situational awareness. Nearly 30% of participating firefighters showed mild to profound hearing loss, a prevalence that is considerably worse than expected by normal aging alone. Educating firefighters about noise-induced hearing loss early in their careers may have significant health implications for their future. These findings provide insights for developing technologies and programs to mitigate the effects of noise exposure in the firefighting population.
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Affiliation(s)
- Barbara Millet
- Department of Interactive Media, University of Miami, Miami, FL 33136, USA
| | - Hillary A. Snapp
- Department of Otolaryngology, University of Miami, Miami, FL 33136, USA
| | - Suhrud M. Rajguru
- Department of Otolaryngology, University of Miami, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33136, USA
- RestorEar Devices LLC, Bozeman, MT 59715, USA
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Barnes CC, Yee KT, Vetter DE. Conditional Ablation of Glucocorticoid and Mineralocorticoid Receptors from Cochlear Supporting Cells Reveals Their Differential Roles for Hearing Sensitivity and Dynamics of Recovery from Noise-Induced Hearing Loss. Int J Mol Sci 2023; 24:3320. [PMID: 36834731 PMCID: PMC9961551 DOI: 10.3390/ijms24043320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 02/01/2023] [Accepted: 02/03/2023] [Indexed: 02/11/2023] Open
Abstract
Endogenous glucocorticoids (GC) are known to modulate basic elements of cochlear physiology. These include both noise-induced injury and circadian rhythms. While GC signaling in the cochlea can directly influence auditory transduction via actions on hair cells and spiral ganglion neurons, evidence also indicates that GC signaling exerts effects via tissue homeostatic processes that can include effects on cochlear immunomodulation. GCs act at both the glucocorticoid receptor (GR) and the mineralocorticoid receptor (MR). Most cell types in the cochlea express both receptors sensitive to GCs. The GR is associated with acquired sensorineural hearing loss (SNHL) through its effects on both gene expression and immunomodulatory programs. The MR has been associated with age-related hearing loss through dysfunction of ionic homeostatic balance. Cochlear supporting cells maintain local homeostatic requirements, are sensitive to perturbation, and participate in inflammatory signaling. Here, we have used conditional gene manipulation techniques to target Nr3c1 (GR) or Nr3c2 (MR) for tamoxifen-induced gene ablation in Sox9-expressing cochlear supporting cells of adult mice to investigate whether either of the receptors sensitive to GCs plays a role in protecting against (or exacerbating) noise-induced cochlear damage. We have selected mild intensity noise exposure to examine the role of these receptors related to more commonly experienced noise levels. Our results reveal distinct roles of these GC receptors for both basal auditory thresholds prior to noise exposure and during recovery from mild noise exposure. Prior to noise exposure, auditory brainstem responses (ABRs) were measured in mice carrying the floxed allele of interest and the Cre recombinase transgene, but not receiving tamoxifen injections (defined as control (no tamoxifen treatment), versus conditional knockout (cKO) mice, defined as mice having received tamoxifen injections. Results revealed hypersensitive thresholds to mid- to low-frequencies after tamoxifen-induced GR ablation from Sox9-expressing cochlear supporting cells compared to control (no tamoxifen) mice. GR ablation from Sox9-expressing cochlear supporting cells resulted in a permanent threshold shift in mid-basal cochlear frequency regions after mild noise exposure that produced only a temporary threshold shift in both control (no tamoxifen) f/fGR:Sox9iCre+ and heterozygous f/+GR:Sox9iCre+ tamoxifen-treated mice. A similar comparison of basal ABRs measured in control (no tamoxifen) and tamoxifen-treated, floxed MR mice prior to noise exposure indicated no difference in baseline thresholds. After mild noise exposure, MR ablation was initially associated with a complete threshold recovery at 22.6 kHz by 3 days post-noise. Threshold continued to shift to higher sensitivity over time such that by 30 days post-noise exposure the 22.6 kHz ABR threshold was 10 dB more sensitive than baseline. Further, MR ablation produced a temporary reduction in peak 1 neural amplitude one day post-noise. While supporting cell GR ablation trended towards reducing numbers of ribbon synapses, MR ablation reduced ribbon synapse counts but did not exacerbate noise-induced damage including synapse loss at the experimental endpoint. GR ablation from the targeted supporting cells increased the basal resting number of Iba1-positive (innate) immune cells (no noise exposure) and decreased the number of Iba1-positive cells seven days following noise exposure. MR ablation did not alter innate immune cell numbers at seven days post-noise exposure. Taken together, these findings support differential roles of cochlear supporting cell MR and GR expression at basal, resting conditions and especially during recovery from noise exposure.
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Affiliation(s)
- Charles C. Barnes
- Graduate Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Kathleen T. Yee
- Department of Otolaryngology–Head and Neck Surgery, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Douglas E. Vetter
- Graduate Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS 39216, USA
- Department of Otolaryngology–Head and Neck Surgery, University of Mississippi Medical Center, Jackson, MS 39216, USA
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Williams EC, Ma Y, Loo DM, Schaefer Solle N, Millet B, Harris K, Snapp HA, Rajguru SM. Monitoring Occupational Noise Exposure in Firefighters Using the Apple Watch. Int J Environ Res Public Health 2023; 20:2315. [PMID: 36767682 PMCID: PMC9915343 DOI: 10.3390/ijerph20032315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 01/18/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
Occupational noise exposure and hearing loss are prominent in the fire service. Firefighters are routinely exposed to hazardous levels of noise arising from the tools and equipment they use, from sirens and alarm tones to the emergency response vehicles they drive. The present study utilized the Apple Watch to continuously measure environmental noise levels for on-duty firefighters. Participants included 15 firefighters from the metropolitan South Florida area, and 25 adult non-firefighter control subjects. Firefighters were recruited from a variety of roles across two stations to ensure noise exposure profiles were appropriately representative of exposures in the fire service. All participants wore an Apple Watch for up to three separate 24 h shifts and completed a post-shift survey self-reporting on perceived exposures over the 24 h study period. Cumulative exposures were calculated for each shift and noise dose was calculated relative to the NIOSH recommended exposure limit of 85 dBA as an 8 h time-weighted average. The maximum dBA recorded on the Apple Watches was statistically significant between groups, with firefighters experiencing a median of 87.79 dBA and controls a median of 77.27 dBA. Estimated Exposure Time at 85 dBA (EET-85) values were significantly higher for firefighters when compared to controls: 3.97 h (range: 1.20-14.7 h) versus 0.42 h (range: 0.05-8.21 h). Only 2 of 16 firefighters reported the use of hearing protection devices during their shifts. Overall, our results highlight the utility of a commonly used personal device to quantify noise exposure in an occupationally at-risk group.
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Affiliation(s)
- Erin C. Williams
- Department of Otolaryngology, University of Miami, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33136, USA
| | - Yiran Ma
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33136, USA
| | - Daniela M. Loo
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33136, USA
| | | | - Barbara Millet
- Department of Interactive Media, University of Miami, Coral Gables, FL 33146, USA
| | - Kristine Harris
- Department of Otolaryngology, University of Miami, Miami, FL 33136, USA
| | - Hillary A. Snapp
- Department of Otolaryngology, University of Miami, Miami, FL 33136, USA
| | - Suhrud M. Rajguru
- Department of Otolaryngology, University of Miami, Miami, FL 33136, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33136, USA
- RestorEar Devices LLC, Bozeman, MT 59715, USA
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Dewangan KN, Patel T, Lalremruata. Noise exposure and hearing loss among tractor drivers in India. Work 2023; 74:167-181. [PMID: 36278371 DOI: 10.3233/wor-210258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Tractors emit high intensity noise and prolonged exposure to high intensity noise causes hearing loss to the drivers. OBJECTIVE The aim of this study was to measure noise intensity at the tractor drivers' ear level and hearing loss among tractor drivers. METHODS Noise intensity was measured on 6 models of tractors which were operated with 5 different tillage implements. In order to assess hearing loss, audiometric test was performed at 7 frequencies, i.e. 250, 500, 1000, 2000, 4000, 6000, and 8000 Hz, among 30 tractor drivers and 30 control group subjects. All the selected tractor drivers and control group subjects were also interviewed to obtain personal information and noise exposure details. RESULTS The tractor drivers were exposed to noise intensity in the range of 91.7-97.5 dB(A). Audiogram analysis shows that the hearing threshold levels were significantly (p < 0.05) higher among the tractor drivers as compared with the control group subjects. The effect was significantly (p < 0.05) more on the left ear as compared with the right ear among the tractor drivers. Increase in age has significant (p < 0.05) effect on the hearing threshold levels on the left ear. Prevalence of high frequency hearing loss was 50% among tractor drivers as compared with 10% among control group subjects. Hearing loss was significantly (p < 0.05) more in the low frequency as compared with the high frequency among the tractor drivers. CONCLUSION Indian tractor operators are exposed to high noise levels which may result in hearing loss. It is recommended that hearing conservation programs should be initiated to prevent noise hazards and hearing loss among the tractor drivers.
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Affiliation(s)
- Krishna Narayan Dewangan
- Department of Agricultural Engineering, North Eastern Regional Institute of Science and Technology (NERIST), Nirjuli, Arunachal Pradesh, India
| | - Thaneswer Patel
- Department of Agricultural Engineering, North Eastern Regional Institute of Science and Technology (NERIST), Nirjuli, Arunachal Pradesh, India
| | - Lalremruata
- Department of Agricultural Engineering, North Eastern Regional Institute of Science and Technology (NERIST), Nirjuli, Arunachal Pradesh, India
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Li Y, Li S, Wu L, Wu T, Li M, Du D, Chen Y, Wang C, Li X, Zhang S, Zhao Z, Zheng L, Chen M, Li M, Li T, Shi X, Qiao Y. Sestrin 2 Deficiency Exacerbates Noise-Induced Cochlear Injury Through Inhibiting ULK1/Parkin-Mediated Mitophagy. Antioxid Redox Signal 2023; 38:115-136. [PMID: 35708118 PMCID: PMC9885551 DOI: 10.1089/ars.2021.0283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 05/31/2022] [Accepted: 06/01/2022] [Indexed: 02/03/2023]
Abstract
Aims: Noise damage to auditory hair cells is associated with oxidative stress and mitochondrial dysfunction. This study aimed to investigate the possible effect of sestrin 2 (SESN2), an endogenous antioxidant protein, on noise-induced hearing loss (NIHL) and the underlying mechanisms. Results: We identified SESN2 as a protective factor against oxidative stress in NIHL through activation of Parkin-mediated mitophagy. Consistently, SESN2 expression was increased and mitophagy was induced during the early stage after a temporary threshold shift due to noise exposure or hydrogen peroxide(H2O2) stimulation; conversely, SESN2 deficiency blocked mitophagy and exacerbated acoustic trauma. Mechanistically, SESN2 interacted with Unc-51-like protein kinase 1(ULK1), promoting ULK1 protein-level stabilization by interfering with its proteasomal degradation. This stabilization is essential for mitophagy initiation, since restoring ULK1 expression in SESN2-silenced cells rescued mitophagy defects. Innovation and Conclusion: Our results provide novel insights regarding SESN2 as a therapeutic target against noise-induced cochlear injury, possibly through improved mitophagy. Antioxid. Redox Signal. 38, 115-136.
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Affiliation(s)
- Yalan Li
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Shengsheng Li
- Department of Neurosurgery, Affiliated People's Hospital of Jiangsu University, Zhenjiang, P.R. China
| | - Liyuan Wu
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Tingting Wu
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Mengxiao Li
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Deliang Du
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Yalin Chen
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Caiji Wang
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Xuanyi Li
- Department of Otorhinolaryngology-Head and Neck Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, P.R. China
| | - Shili Zhang
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Zeqi Zhao
- Department of Otorhinolaryngology-Head and Neck Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, P.R. China
| | - Liting Zheng
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Mengbing Chen
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Menghua Li
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Ting Li
- School of Life Sciences, Xuzhou Medical University, Xuzhou, P.R. China
| | - Xi Shi
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
| | - Yuehua Qiao
- Institute of Audiology and Balance Science, Xuzhou Medical University, Xuzhou, P.R. China
- The Artificial Auditory Laboratory of Jiangsu Province, Xuzhou Medical University, Xuzhou, P.R. China
- Department of Otorhinolaryngology-Head and Neck Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, P.R. China
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Silva VAR, Guimarães AC, Lavinsky J, de Castro RF, Freitas PP, Castilho AM, Chone CT, Crespo AN. Are hearing protection devices used in the workplace really efficient? A systematic review. Work 2022; 74:477-484. [PMID: 36463468 DOI: 10.3233/wor-205290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND The most common current hearing protection devices (HPDs) on the market include earplugs and earmuffs. A variety of materials can be used to manufacture these devices, and each offers a level of noise attenuation that is informed by the manufacturer although it does not always correspond to the attenuation observed in real-world use. OBJECTIVE To evaluate the noise attenuation of HPDs available to workers exposed to noise. METHODS The most relevant studies originally published in English, Portuguese, or Spanish that investigated the noise attenuation effectiveness of HPDs used by workers exposed to noise were analyzed. The following electronic databases were searched by 2 independent reviewers for studies published from 1999 to 2019: MEDLINE (PubMed), Scopus, Web of Science, EMBASE, Cochrane Library (OVID), ProQuest, and BVS-Bireme. Different combinations of the following search terms (MeSH terms) were used for all databases: "Hearing Loss, Noise-Induced", "Ear Protective Devices" (Efficacy OR Effectiveness)", "Noise, Occupational". RESULTS The search strategy yielded a total of 326 potentially relevant studies. After the removal of duplicates, 156 remained for the screening of titles and abstracts. After reviewing titles and abstracts, 46 studies were selected for full-text reading. Of these, six were included in this systematic review. CONCLUSION Hearing protection devices reduced the noise exposure and were effective in all included studies in different countries, types of activity, and sound pressure exposure.
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Affiliation(s)
- Vagner Antonio Rodrigues Silva
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medical Sciences, Universidade Estadual de Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
| | - Alexandre Caixeta Guimarães
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medical Sciences, Universidade Estadual de Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
| | - Joel Lavinsky
- Department of Surgery, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Rafael Freire de Castro
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medical Sciences, Universidade Estadual de Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
| | - Paola Piva Freitas
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medical Sciences, Universidade Estadual de Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
| | - Arthur Menino Castilho
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medical Sciences, Universidade Estadual de Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
| | - Carlos Takahiro Chone
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medical Sciences, Universidade Estadual de Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
| | - Agrício Nubiato Crespo
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medical Sciences, Universidade Estadual de Campinas (UNICAMP), Cidade Universitária Zeferino Vaz, Campinas, SP, Brazil
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44
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Xu X, Feng Y, Wang J, Salvi R, Yin X, Gao J, Chen Y. Auditory-limbic-cerebellum interactions and cognitive impairments in noise-induced hearing loss. CNS Neurosci Ther 2022; 29:932-940. [PMID: 36377461 PMCID: PMC9928548 DOI: 10.1111/cns.14028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/23/2022] [Accepted: 10/24/2022] [Indexed: 11/16/2022] Open
Abstract
AIMS This study aimed to explore the neural substrate of hearing loss-related central nervous system in rats and its correlation with cognition. METHODS We identified the neural mechanism for these debilitating abnormalities by inducing a bilateral hearing loss animal model using intense broadband noise (122 dB of broadband noise for 2 h) and used the Morris water maze test to characterize the behavioral changes at 6 months post-noise exposure. Functional magnetic resonance imaging (fMRI) was conducted to clarify disrupted functional network using bilateral auditory cortex (ACx) as a seed. Structural diffusion tensor imaging (DTI) was applied to illustrate characteristics of fibers in ACx and hippocampus. Pearson correlation was computed behavioral tests and other features. RESULTS A deficit in spatial learning/memory, body weight, and negative correlation between them was observed. Functional connectivity revealed weakened coupling within the ACx and inferior colliculus, lateral lemniscus, the primary motor cortex, the olfactory tubercle, hippocampus, and the paraflocculus lobe of the cerebellum. The fiber number and mean length of ACx and different hippocampal subregions were also damaged in hearing loss rats. CONCLUSION A new model of auditory-limbic-cerebellum interactions accounting for noise-induced hearing loss and cognitive impairments is proposed.
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Affiliation(s)
- Xiao‐Min Xu
- Department of Radiology, Nanjing First HospitalNanjing Medical UniversityNanjingChina
| | - Yuan Feng
- Department of Radiology, Nanjing First HospitalNanjing Medical UniversityNanjingChina
| | - Jian Wang
- School of Human Communication DisordersDalhousie UniversityHalifaxNova ScotiaCanada
| | - Richard Salvi
- Center for Hearing and DeafnessUniversity at BuffaloBuffaloNew YorkUSA
| | - Xindao Yin
- Department of Radiology, Nanjing First HospitalNanjing Medical UniversityNanjingChina
| | - Jun Gao
- The Department of Neurobiology, Key Laboratory of Human Functional Genomics of JiangsuNanjing Medical UniversityNanjingChina
| | - Yu‐Chen Chen
- Department of Radiology, Nanjing First HospitalNanjing Medical UniversityNanjingChina
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Pawlaczyk-Łuszczyńska M, Dudarewicz A, Zaborowski K, Zamojska-Daniszewska M. Noise exposure and hearing status among employees using communication headsets. Int J Occup Med Environ Health 2022; 35:585-614. [PMID: 35916284 PMCID: PMC10464809 DOI: 10.13075/ijomeh.1896.01817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 04/05/2022] [Indexed: 10/16/2022] Open
Abstract
OBJECTIVES The objective of this study was to assess the hearing of employees using communication headsets with regard to their exposure to noise. MATERIAL AND METHODS The study group comprised 213 employees, including 21 workers of the furniture industry, 15 court transcribers and 177 call center operators, aged 19-55 years, working with headsets for a period of up to 25 years. All the participants underwent a standard puretone audiometry, extended high-frequency audiometry (EHFA) as well as transient-evoked otoacoustic emissions (TEOAEs) and distortion-product otoacoustic emissions (DPOAEs). Noise exposure from headsets was evaluated using the microphone in a real ear technique according to PN-EN ISO 11904-1:2008. RESULTS Personal daily noise exposure levels ranged 57-96 dB and exceeded 85 dB only in 1.4% of the call center operators. Forty-two percent of the participants had bilateral normal hearing in the standard frequency range of 250-8000 Hz, and 33% in the extended highfrequency range of 9-16 kHz. It was found that DPOAEs were present bilaterally in 59% of the participants. Reproducibility of TEOAE at >70% and signal-to-noise ratio at >6 was exhibited by 42% and 17% of them, respectively. The 3 subgroups of workers differed in age, gender, noise exposure and type of headsets in use. However, after adjusting for age and gender, significant differences between these subgroups in terms of hearing were mostly visible in EHFA. A significant impact of age, gender, daily noise exposure level and current job tenure on hearing tests results was also noted among the call center operators and the transcribers. The most pronounced were the effects of age and gender, whereas the impact of the daily noise exposure level was less evident. CONCLUSIONS It seems that EHFA is useful for recognizing early signs of noise-induced hearing loss among communication headset users. However, further studies are needed before any firm conclusions concerning the risk of hearing impairment due to the use of such devices can be drawn. Int J Occup Med Environ Health. 2022;35(5):585-614.
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Affiliation(s)
| | - Adam Dudarewicz
- Nofer Institute of Occupational Medicine, Department of Physical Hazards, Łódź, Poland
| | - Kamil Zaborowski
- Nofer Institute of Occupational Medicine, Department of Physical Hazards, Łódź, Poland
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46
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Chang JL, Huwyler C, Yoshida N, Henderson Sabes J, Cheung SW. A Smartphone Application and Education Program for Hearing Health Promotion in High School Teenagers. Laryngoscope 2022. [PMID: 36169307 DOI: 10.1002/lary.30411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/04/2022] [Accepted: 08/29/2022] [Indexed: 11/05/2022]
Abstract
OBJECTIVES To assess knowledge retention after video-based hearing health education and measure headphone listening behavior change using a novel smartphone application. METHODS In this prospective longitudinal study, students participated in video-based hearing health education and hearing screening sessions. Hearing health knowledge was assessed in students and parents after 6 weeks. A novel smartphone application was created to measure daily noise exposure based on volume settings with headphone use and to display the National Institute for Occupational Safety and Health (NIOSH) noise doses with alerts for cumulative daily doses nearing the maximum. RESULTS Seventy-six teenage students and parents participated. Eighty three percent of participants identified as a racial or ethnic minority and 66% were of low-income socioeconomic status. Hearing health knowledge was retained in students 6 weeks after education and parents' knowledge improved from baseline. The smartphone app was installed on 12 student phones, and 25% of days monitored exhibited noise doses that exceeded the NIOSH maximum. App use for at least 10 days by nine students showed a significant reduction in average daily noise dose and time spent at the highest volume settings during the second-half of app use. CONCLUSIONS Video-based hearing health education with knowledge question reinforcement was associated with knowledge retention in students and improved parental attitudes and knowledge about hearing conservation. A smartphone app with a real-time display of headphone cumulative noise exposure dose identified at-risk students. The integration of hearing health education, hearing screening, and digital health tools has promised to promote positive behavior changes for long-term hearing conservation. LEVEL OF EVIDENCE 4 Laryngoscope, 2022.
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Affiliation(s)
- Jolie L Chang
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, California, USA.,Surgical Services, San Francisco Veterans Affairs Health Care System, San Francisco, California, USA
| | - Camille Huwyler
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, California, USA
| | | | - Jennifer Henderson Sabes
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, California, USA
| | - Steven W Cheung
- Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, California, USA.,Surgical Services, San Francisco Veterans Affairs Health Care System, San Francisco, California, USA
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47
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Snapp HA, Schaefer Solle N, Millet B, Rajguru SM. Subclinical Hearing Deficits in Noise-Exposed Firefighters. Int J Environ Res Public Health 2022; 19:11028. [PMID: 36078744 PMCID: PMC9518181 DOI: 10.3390/ijerph191711028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/24/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
Noise-induced hearing loss (NIHL) is the most prevalent occupational disease in the world and firefighters are at increased risk of NIHL due to their frequent exposure to hazardous levels of noise during service. Adverse effects of NIHL include acceleration of age-related hearing loss and an increased risk of cognitive decline. A critical challenge in addressing NIHL is the delayed clinical presentation of symptoms and lack of sensitive tools for early detection. To study the early clinical symptoms of NIHL in this high-risk group, we collected hearing function data including behavioral audiometric thresholds and distortion product otoacoustic emissions (DPOAEs) in 176 firefighters during annual physical assessments. Results revealed significant deficits in cochlear outer hair cell function in the presence of normal audiograms. Additionally, 55% of firefighters self-reported changes in hearing, while 20% self-reported concerns about their balance. This study is the first to characterize DPOAEs in firefighters who display decreased DPOAE amplitudes with increasing years in the fire service. These effects were observed even when controlling for hearing loss and age and are suggestive of a link between hearing loss and occupational exposure to hazardous noise.
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Affiliation(s)
- Hillary A. Snapp
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA or
| | - Natasha Schaefer Solle
- Department of Medicine, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Barbara Millet
- Department of Interactive Media, University of Miami, Coral Gables, FL 33146, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33146, USA
| | - Suhrud M. Rajguru
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA or
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33146, USA
- RestorEar Devices LLC, Kirkland, WA 98033, USA
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48
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Chen K, Wang F, Ding R, Cai Z, Zou T, Zhang A, Guo D, Ye B, Cui W, Xiang M. Adhesive and Injectable Hydrogel Microspheres for Inner Ear Treatment. Small 2022; 18:e2106591. [PMID: 35106912 DOI: 10.1002/smll.202106591] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 01/05/2022] [Indexed: 06/14/2023]
Abstract
The least damaging and most economical method to deliver drugs or carriers into the inner ear for treatment of disease is through the middle ear. However, the retention of drug in the middle ear is an obstacle. Here, inspired by the adhesion of mussels, a methacrylate gelatin microspheres (GM) coupling polydopamine (PDA) layer (GM@PDA) with excellent adhesive ability is constructed, and Ebselen liposomes are further loaded into the GM@PDA (GM@PDA@Lipo-Ebselen). The loading capacity of GM@PDA for Ebselen liposomes is 25 ± 1 µg mg-1 microspheres. GM@PDA@Lipo-Ebselen could be injected on round windows membrane (RWM) and tightly adheres to the surface of RWM by PDA, and the microspheres are even still attached to the RWM after 360° rotation and inverted shaking. The in vivo imaging system shows that the adhesive microspheres can prolong the retention of the middle ear cavity for more than 7 days. The hearing of mice in the GM@PDA@Lipo-Ebselen group is significantly recovered, especially on day 14 after noise exposure, and the hearing of each frequency is restored to baseline level. At 32 kHz frequency, the survival of outer hair cells recovers from 48 0± 6% to 93 ± 2%. Therefore, the adhesive and injectable hydrogel microspheres provide a promising strategy for the treatment of hearing loss.
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Affiliation(s)
- Kaili Chen
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Fei Wang
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Rui Ding
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Zhengwei Cai
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Tianyuan Zou
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Andi Zhang
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Dongye Guo
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Bin Ye
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Wenguo Cui
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Mingliang Xiang
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
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Kilic K, Sakat MS, Sahin A, Yildirim S, Dortbudak MB. The effectiveness of berberine on noise-induced hearing loss: a rat model. Rev Assoc Med Bras (1992) 2022; 68:1330-1336. [PMID: 36228267 PMCID: PMC9575033 DOI: 10.1590/1806-9282.20220758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 07/04/2022] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVE: Noise-induced hearing loss is a preventable form of hearing loss that has serious social and economic impacts. This study aimed to investigate the protective effect of berberine, a potent antioxidant and anti-inflammatory agent, against Noise-induced hearing loss. METHODS: After applying distortion product otoacoustic emission, 28 female Sprague-Dawley rats were randomly divided into four groups. Group 1 was designated as acoustic trauma group, and rats in this group were exposed to white noise for 12 h at an intensity of 4 kHz 110 dB sound pressure level. Group 2 was the control group. Group 3 was designated as the berberine group, and 100 mg/kg of berberine was administered to rats in this group by intragastric lavage for five consecutive days. Group 4 was designated as the acoustic trauma+berberine group. distortion product otoacoustic emission was repeated on the 6th day of the study and cochlear tissues of rats were dissected for histopathological and immunohistochemical analyses after sacrificing rats. RESULTS: The distortion product otoacoustic emission results showed a significant decrease in signal-noise ratio values at higher frequencies in rats of the trauma group compared to those in other groups. Acoustic trauma caused severe histopathological impairment at cochlear structures together with severe 8-hydroxy-2-deoxyguanosine expression. Rats in the acoustic trauma+berberine group showed mild histopathological changes with mild 8-hydroxy-2-deoxyguanosine expression and better signal-noise ratio values. CONCLUSION: The histopathological and audiological findings of this experimental study showed that berberine provides protection in Noise-induced hearing loss and may have the potential for use in acoustic trauma-related hearing losses.
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Affiliation(s)
- Korhan Kilic
- Ataturk University, Faculty of Medicine, Department of Otorhinolaryngology – Erzurum, Turkey.,Corresponding author:
| | - Muhammed Sedat Sakat
- Ataturk University, Faculty of Medicine, Department of Otorhinolaryngology – Erzurum, Turkey
| | - Abdulkadir Sahin
- Ataturk University, Faculty of Medicine, Department of Otorhinolaryngology – Erzurum, Turkey
| | - Serkan Yildirim
- Ataturk University, Faculty of Veterinary, Department of Pathology – Erzurum, Turkey
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50
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Kugelman D, Weppler CG, Warren CF, Lajam CM. Occupational Hazards of Orthopedic Surgery Exposures: Infection, Smoke, and Noise. J Arthroplasty 2022; 37:1470-1473. [PMID: 35304300 DOI: 10.1016/j.arth.2022.03.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 02/23/2022] [Accepted: 03/08/2022] [Indexed: 02/02/2023] Open
Abstract
The orthopedic environment exposes surgeons and staff to infection, surgical smoke, and high levels of noise. It is helpful to understand how exposure increases the risk for adverse health consequences. Protective equipment, safety protocols, and instrument modification can reduce exposure to hazards. When modifications to practice are made, they must be evaluated to ensure they do not introduce new hazards or impede the use of instruments. Despite evidence of risk, protective measures are seldom employed in orthopedic practice. Wider implementation of protection for clinicians may not occur unless the same hazards are shown to impact patient outcomes.
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Affiliation(s)
- David Kugelman
- Orthopedic Surgery, NYU Langone Grossman School of Medicine, Chief Orthopedic Safety Officer, NYU Langone Health, New York, New York
| | - Campbell G Weppler
- Orthopedic Surgery, NYU Langone Grossman School of Medicine, Chief Orthopedic Safety Officer, NYU Langone Health, New York, New York
| | - Cooper F Warren
- Orthopedic Surgery, NYU Langone Grossman School of Medicine, Chief Orthopedic Safety Officer, NYU Langone Health, New York, New York
| | - Claudette M Lajam
- Orthopedic Surgery, NYU Langone Grossman School of Medicine, Chief Orthopedic Safety Officer, NYU Langone Health, New York, New York
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