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Zhao HB, Liu LM, Mei L, Quinonez AT, Roberts RA, Lu X. Prevention and treatment of noise-induced hearing loss and cochlear synapse degeneration by potassium channel blockers in vivo. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.04.597382. [PMID: 38895254 PMCID: PMC11185602 DOI: 10.1101/2024.06.04.597382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Noise can induce hearing loss. In particularly, noise can induce cochlear synapse degeneration leading to hidden hearing loss, which is the most common type of hearing disorders in the clinic. Currently, there is no pharmacological treatment, particularly, no post-exposure (i.e., therapeutic) treatment available in the clinic. Here, we report that systematic administration of K + channel blockers before or after noise exposure could significantly attenuate NIHL and synapse degeneration. After systematic administration of a general K-channel blocker tetraethylammonium (TEA), the elevation of auditory brainstem response (ABR) thresholds after noise-exposure significantly reduced, and the active cochlear mechanics significantly improved. The therapeutic effect was further improved as the post-exposure administration time extending to 3 days. BK channel is a predominant K + channel in the inner hair cells. Systematic administration of a BK channel blocker GAL-021 after noise exposure also ameliorated hearing loss and improved hearing behavioral responses tested by acoustic startle response (ASR). Finally, both TEA and GAL-021 significantly attenuated noise-induced ribbon synapse degeneration. These data demonstrate that K + -channel blockers can prevent and treat NIHL and cochlear synapse degeneration. Our finding may aid in developing therapeutic strategies for post-exposure treatment of NIHL and synapse degeneration. Significance Statement Noise is a common deafness factor affecting more 100 million people in the United States. So far, there is no pharmacological treatment available. We show here that administration of K + channel blockers after noise exposure could attenuate noise-induced hearing loss and synapse degeneration, and improved behavioral responses. This is the first time to real the K + channel blockers that could treat noise-induced hearing loss and cochlear synaptopathy after noise exposure.
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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: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [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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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] [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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Brutnell TP, Wang X, Bao J. Integrating pharmacogenomics into clinical trials of hearing disorders. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2022; 152:2828. [PMID: 36456290 PMCID: PMC9648993 DOI: 10.1121/10.0015092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 09/26/2022] [Accepted: 10/20/2022] [Indexed: 06/17/2023]
Abstract
In 2019, the U.S. Food and Drug Administration issued guidance to increase the efficiency of drug development and support precision medicine, including tailoring treatments to those patients who will benefit based on genetic variation even in the absence of a documented mechanism of action. Although multiple advancements have been made in the field of pharmacogenetics (PGx) for other disease conditions, there are no approved PGx guidelines in the treatment of hearing disorders. In studies of noise-induced hearing loss (NIHL), some progress has been made in the last several years associating genomic loci with susceptibility to noise damage. However, the power of such studies is limited as the underlying physiological responses may vary considerably among the patient populations. Here, we have summarized previous animal studies to argue that NIHL subtyping is a promising strategy to increase the granularity of audiological assessments. By coupling this enhanced phenotyping capability with genetic association studies, we suggest that drug efficacy will be better predicted, increasing the likelihood of success in clinical trials when populations are stratified based on genetic variation or designed with multidrug combinations to reach a broader segment of individuals suffering or at risk from NIHL.
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Affiliation(s)
| | - Xinwen Wang
- Department of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, Ohio 44272, USA
| | - Jianxin Bao
- Gateway Biotechnology, St. Louis, Missouri 63132, USA
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5
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Hearing loss drug discovery and medicinal chemistry: Current status, challenges, and opportunities. PROGRESS IN MEDICINAL CHEMISTRY 2022; 61:1-91. [PMID: 35753714 DOI: 10.1016/bs.pmch.2022.05.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Hearing loss is a severe high unmet need condition affecting more than 1.5 billion people globally. There are no licensed medicines for the prevention, treatment or restoration of hearing. Prosthetic devices, such as hearing aids and cochlear implants, do not restore natural hearing and users struggle with speech in the presence of background noise. Hearing loss drug discovery is immature, and small molecule approaches include repurposing existing drugs, combination therapeutics, late-stage discovery optimisation of known chemotypes for identified molecular targets of interest, phenotypic tissue screening and high-throughput cell-based screening. Hearing loss drug discovery requires the integration of specialist therapeutic area biology and otology clinical expertise. Small molecule drug discovery projects in the global clinical portfolio for hearing loss are here collated and reviewed. An overview is provided of human hearing, inner ear anatomy, inner ear delivery, types of hearing loss and hearing measurement. Small molecule experimental drugs in clinical development for hearing loss are reviewed, including their underpinning biology, discovery strategy and activities, medicinal chemistry, calculated physicochemical properties, pharmacokinetics and clinical trial status. SwissADME BOILED-Egg permeability modelling is applied to the molecules reviewed, and these results are considered. Non-small molecule hearing loss assets in clinical development are briefly noted in this review. Future opportunities in hearing loss drug discovery for human genomics and targeted protein degradation are highlighted.
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Bao J, Jegede SL, Hawks JW, Dade B, Guan Q, Middaugh S, Qiu Z, Levina A, Tsai TH. Detecting Cochlear Synaptopathy Through Curvature Quantification of the Auditory Brainstem Response. Front Cell Neurosci 2022; 16:851500. [PMID: 35356798 PMCID: PMC8959412 DOI: 10.3389/fncel.2022.851500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 02/14/2022] [Indexed: 11/13/2022] Open
Abstract
The sound-evoked electrical compound potential known as auditory brainstem response (ABR) represents the firing of a heterogenous population of auditory neurons in response to sound stimuli, and is often used for clinical diagnosis based on wave amplitude and latency. However, recent ABR applications to detect human cochlear synaptopathy have led to inconsistent results, mainly due to the high variability of ABR wave-1 amplitude. Here, rather than focusing on the amplitude of ABR wave 1, we evaluated the use of ABR wave curvature to detect cochlear synaptic loss. We first compared four curvature quantification methods using simulated ABR waves, and identified that the cubic spline method using five data points produced the most accurate quantification. We next evaluated this quantification method with ABR data from an established mouse model with cochlear synaptopathy. The data clearly demonstrated that curvature measurement is more sensitive and consistent in identifying cochlear synaptic loss in mice compared to the amplitude and latency measurements. We further tested this curvature method in a different mouse model presenting with otitis media. The change in curvature profile due to middle ear infection in otitis media is different from the profile of mice with cochlear synaptopathy. Thus, our study suggests that curvature quantification can be used to address the current ABR variability issue, and may lead to additional applications in the clinic diagnosis of hearing disorders.
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Affiliation(s)
- Jianxin Bao
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH, United States
- Department of Research and Development, Gateway Biotechnology Inc., Rootstown, OH, United States
- *Correspondence: Jianxin Bao,
| | - Segun Light Jegede
- Department of Mathematical Sciences, Kent State University, Kent, OH, United States
| | - John W. Hawks
- Department of Research and Development, Gateway Biotechnology Inc., Rootstown, OH, United States
| | - Bethany Dade
- Department of Research and Development, Gateway Biotechnology Inc., Rootstown, OH, United States
| | - Qiang Guan
- Department of Computer Science, Kent State University, Kent, OH, United States
| | - Samantha Middaugh
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH, United States
| | - Ziyu Qiu
- Department of Research and Development, Gateway Biotechnology Inc., Rootstown, OH, United States
| | - Anna Levina
- Department of Mathematical Sciences, Kent State University, Kent, OH, United States
| | - Tsung-Heng Tsai
- Department of Mathematical Sciences, Kent State University, Kent, OH, United States
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Chen Y, Bielefeld EC, Mellott JG, Wang W, Mafi AM, Yamoah EN, Bao J. Early Physiological and Cellular Indicators of Cisplatin-Induced Ototoxicity. J Assoc Res Otolaryngol 2021; 22:107-126. [PMID: 33415542 DOI: 10.1007/s10162-020-00782-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 12/14/2020] [Indexed: 12/11/2022] Open
Abstract
Cisplatin chemotherapy often causes permanent hearing loss, which leads to a multifaceted decrease in quality of life. Identification of early cisplatin-induced cochlear damage would greatly improve clinical diagnosis and provide potential drug targets to prevent cisplatin's ototoxicity. With improved functional and immunocytochemical assays, a recent seminal discovery revealed that synaptic loss between inner hair cells and spiral ganglion neurons is a major form of early cochlear damage induced by noise exposure or aging. This breakthrough discovery prompted the current study to determine early functional, cellular, and molecular changes for cisplatin-induced hearing loss, in part to determine if synapse injury is caused by cisplatin exposure. Cisplatin was delivered in one to three treatment cycles to both male and female mice. After the cisplatin treatment of three cycles, threshold shift was observed across frequencies tested like previous studies. After the treatment of two cycles, beside loss of outer hair cells and an increase in high-frequency hearing thresholds, a significant latency delay of auditory brainstem response wave 1 was observed, including at a frequency region where there were no changes in hearing thresholds. The wave 1 latency delay was detected as early cisplatin-induced ototoxicity after only one cycle of treatment, in which no significant threshold shift was found. In the same mice, mitochondrial loss in the base of the cochlea and declining mitochondrial morphometric health were observed. Thus, we have identified early spiral ganglion-associated functional and cellular changes after cisplatin treatment that precede significant threshold shift.
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Affiliation(s)
- Yingying Chen
- Translational Research Center, Department of Neurobiology and Anatomy, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
- Department of Physiology and Cell Biology, University of Nevada, Reno, Reno, NV, 95616, USA
| | - Eric C Bielefeld
- Department of Speech and Hearing Science, The Ohio State University, 110 Pressey Hall, 1070 Carmack Road, Columbus, OH, 43210, USA
| | - Jeffrey G Mellott
- Translational Research Center, Department of Neurobiology and Anatomy, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
| | - Weijie Wang
- Translational Research Center, Department of Neurobiology and Anatomy, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
- School of Pharmacy, Anhui Medical University, Hefei, China
| | - Amir M Mafi
- Translational Research Center, Department of Neurobiology and Anatomy, Northeast Ohio Medical University, Rootstown, OH, 44272, USA
| | - Ebenezer N Yamoah
- Department of Physiology and Cell Biology, University of Nevada, Reno, Reno, NV, 95616, USA
| | - Jianxin Bao
- Translational Research Center, Department of Neurobiology and Anatomy, Northeast Ohio Medical University, Rootstown, OH, 44272, USA.
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8
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Soares M, Santos ABD, Weich TM, Mânica GG, Homem de Bittencourt PI, Ludwig MS, Heck TG. Heat shock response in noise-induced hearing loss: effects of alanyl-glutamine dipeptide supplementation on heat shock proteins status. Braz J Otorhinolaryngol 2020; 86:703-710. [PMID: 31255578 PMCID: PMC9422582 DOI: 10.1016/j.bjorl.2019.04.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 03/30/2019] [Accepted: 04/17/2019] [Indexed: 02/07/2023] Open
Abstract
Introduction Objective Methods Results Conclusions
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Affiliation(s)
- Marcos Soares
- Universidade Regional do Noroeste do Estado do Rio Grande do Sul (Unijuí), Departamento de Ciências da Vida, Programa de Pós-Graduação em Atenção Integral à Saúde, Ijuí, RS, Brazil.
| | - Analu B Dos Santos
- Universidade Regional do Noroeste do Estado do Rio Grande do Sul (Unijuí), Departamento de Ciências da Vida, Programa de Pós-Graduação em Atenção Integral à Saúde, Ijuí, RS, Brazil
| | - Tainara M Weich
- Universidade Regional do Noroeste do Estado do Rio Grande do Sul (Unijuí), Departamento de Ciências da Vida, Programa de Pós-Graduação em Atenção Integral à Saúde, Ijuí, RS, Brazil
| | - Gabriela Gomes Mânica
- Universidade Regional do Noroeste do Estado do Rio Grande do Sul (Unijuí), Departamento de Ciências da Vida, Programa de Pós-Graduação em Atenção Integral à Saúde, Ijuí, RS, Brazil
| | - Paulo Ivo Homem de Bittencourt
- Universidade Federal do Rio Grande do Sul, Instituto de Ciências Básicas da Saúde, Departamento de Fisiologia, Porto Alegre, RS, Brazil
| | - Mirna Stela Ludwig
- Universidade Regional do Noroeste do Estado do Rio Grande do Sul (Unijuí), Departamento de Ciências da Vida, Programa de Pós-Graduação em Atenção Integral à Saúde, Ijuí, RS, Brazil
| | - Thiago Gomes Heck
- Universidade Regional do Noroeste do Estado do Rio Grande do Sul (Unijuí), Departamento de Ciências da Vida, Programa de Pós-Graduação em Atenção Integral à Saúde, Ijuí, RS, Brazil.
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Alvarado JC, Fuentes-Santamaría V, Juiz JM. Antioxidants and Vasodilators for the Treatment of Noise-Induced Hearing Loss: Are They Really Effective? Front Cell Neurosci 2020; 14:226. [PMID: 32792910 PMCID: PMC7387569 DOI: 10.3389/fncel.2020.00226] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 06/29/2020] [Indexed: 12/26/2022] Open
Abstract
We live in a world continuously immersed in noise, an environmental, recreational, and occupational factor present in almost every daily human activity. Exposure to high-level noise could affect the auditory function of individuals at any age, resulting in a condition called noise-induced hearing loss (NIHL). Given that by 2018, more than 400 million people worldwide were suffering from disabling hearing loss and that about one-third involved noise over-exposure, which represents more than 100 million people, this hearing impairment represents a serious health problem. As of today, there are no therapeutic measures available to treat NIHL. Conventional preventive measures, including public awareness and education and physical barriers to noise, do not seem to suffice, as the population is still being affected by damaging noise levels. Therefore, it is necessary to develop or test pharmacological agents that may prevent and/or diminish the impact of noise on hearing. Data availability about the pathophysiological processes involved in triggering NIHL has allowed researchers to use compounds, that could act as effective therapies, by targeting specific mechanisms such as the excess generation of free radicals and blood flow restriction to the cochlea. In this review, we summarize the advantages/disadvantages of these therapeutic agents, providing a critical view of whether they could be effective in the human clinic.
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Affiliation(s)
- Juan Carlos Alvarado
- Facultad de Medicina, Instituto de Investigación en Discapacidades, Neurológicas (IDINE), Universidad de Castilla-La Mancha, Albacete, Spain
| | - Verónica Fuentes-Santamaría
- Facultad de Medicina, Instituto de Investigación en Discapacidades, Neurológicas (IDINE), Universidad de Castilla-La Mancha, Albacete, Spain
| | - José M Juiz
- Facultad de Medicina, Instituto de Investigación en Discapacidades, Neurológicas (IDINE), Universidad de Castilla-La Mancha, Albacete, Spain.,Department of Otolaryngology, Hannover Medical School, NIFE-VIANNA, Cluster of Excellence Hearing4all-German Research Foundation, Hannover, Germany
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10
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Bahaloo M, Rezvani ME, Farashahi Yazd E, Davari MH, Mehrparvar AH. Effect of Myricetin on the Prevention of Noise-Induced Hearing Loss-An Animal Model. IRANIAN JOURNAL OF OTORHINOLARYNGOLOGY 2019; 31:273-279. [PMID: 31598494 PMCID: PMC6764812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
INTRODUCTION Exposure to hazardous noise induces one of the forms of acquired and preventable hearing loss that is noise-induced hearing loss (NIHL). Considering oxidative stress as the main mechanism of NIHL, it is possible that myricetin can protect NIHL by its antioxidant effect. Therefore, the present study aimed to investigate the preventive effect of myricetin on NIHL. MATERIALS AND METHODS A total of 21 Wistar rats were randomly divided into five groups, namely (1) noise exposure only as control group, (2) noise exposure with the vehicle of myricetin as solvent group, (3) noise exposure with myricetin 5 mg/kg as myricetin 5 mg group, (4) noise exposure with myricetin 10 mg/kg as myricetin 10 mg group, (5) and non-exposed as sham group. The hearing status of each animal was assessed by Distortion Product Otoacoustic Emissions. RESULTS The levels of response amplitude decreased after the exposure to noise in all groups and returned to a higher level after 14 days of noise abstinence at most frequencies; however, the difference was not significant in the myricetin-receiving or control groups. CONCLUSION The results of this study showed that two doses of myricetin (5 and 10 mg/kg) administered intraperitoneally could not significantly decrease transient or permanent threshold shifts in rats exposed to loud noise.
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Affiliation(s)
- Maryam Bahaloo
- Industrial Diseases Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
| | | | - Ehsan Farashahi Yazd
- Stem Cell Biology Research Center, Yazd Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
| | - Mohammad Hossein Davari
- Department of Occupational Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
| | - Amir Houshang Mehrparvar
- Industrial Diseases Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. ,Corresponding Author: Occupational Medicine Clinic, Shahid Rahnemoun Hospital, Farrokhi ave., Yazd, Iran. Tel: 00983536229193, E-mail:
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11
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Lauer AM, Schrode KM. Sex bias in basic and preclinical noise-induced hearing loss research. Noise Health 2019; 19:207-212. [PMID: 28937014 PMCID: PMC5644379 DOI: 10.4103/nah.nah_12_17] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Introduction: Sex differences in brain biochemistry, physiology, structure, and function have been gaining increasing attention in the scientific community. Males and females can have different responses to medications, diseases, and environmental variables. A small number of the approximately 7500 studies of noise-induced hearing loss (NIHL) have identified sex differences, but the mechanisms and characterization of these differences have not been thoroughly studied. The National Institutes of Health (NIH) issued a mandate in 2015 to include sex as a biological variable in all NIH-funded research beginning in January 2016. Materials and Methods: In the present study, the representation of sex as a biological variable in preclinical and basic studies of NIHL was quantified for a 5-year period from January 2011 to December 2015 prior to the implementation of the NIH mandate. Results: The analysis of 210 basic and preclinical studies showed that when sex is specified, experiments are predominantly performed on male animals. Discussion: This bias is present in studies completed in the United States and foreign institutions, and the proportion of studies using only male participants has actually increased over the 5-year period examined. Conclusion: These results underscore the need to invest resources in studying NIHL in both sexes to better understand how sex shapes the outcomes and to optimize treatment and prevention strategies.
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Affiliation(s)
- Amanda Marie Lauer
- Department of Otolaryngology-HNS and Center for Hearing and Balance, Johns Hopkins University, Baltimore, MD, United States
| | - Katrina Marie Schrode
- Department of Otolaryngology-HNS and Center for Hearing and Balance, Johns Hopkins University, Baltimore, MD, United States
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12
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Bielefeld EC, Kobel MJ. Advances and Challenges in Pharmaceutical Therapies to Prevent and Repair Cochlear Injuries From Noise. Front Cell Neurosci 2019; 13:285. [PMID: 31297051 PMCID: PMC6607696 DOI: 10.3389/fncel.2019.00285] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 06/13/2019] [Indexed: 12/20/2022] Open
Abstract
Noise induces a broad spectrum of pathological injuries to the cochlea, reflecting both mechanical damage to the delicate architecture of the structures of the organ of Corti and metabolic damage within the organ of Corti and lateral wall tissues. Unlike ototoxic medications, the blood-labyrinth barrier does not offer protection against noise injury. The blood-labyrinth barrier is a target of noise injury, and can be weakened as part of the metabolic pathologies in the cochlea. However, it also offers a potential for therapeutic intervention with oto-protective compounds. Because the blood-labyrinth barrier is weakened by noise, penetration of blood-borne oto-protective compounds could be higher. However, systemic dosing for cochlear protection from noise offers other significant challenges. An alternative option to systemic dosing is local administration to the cochlea through the round window membrane using a variety of drug delivery techniques. The review will discuss noise-induced cochlear pathology, including alterations to the blood-labyrinth barrier, and then transition into discussing approaches for delivery of oto-protective compounds to reduce cochlear injury from noise.
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Affiliation(s)
- Eric C Bielefeld
- Department of Speech and Hearing Science, The Ohio State University, Columbus, OH, United States
| | - Megan J Kobel
- Department of Speech and Hearing Science, The Ohio State University, Columbus, OH, United States.,Department of Otolaryngology-Head & Neck Surgery, The Ohio State University Wexner Medical Center, Columbus, OH, United States
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Abstract
There is an urgent need for otoprotective drug agents. Prevention of noise-induced hearing loss continues to be a major challenge for military personnel and workers in a variety of industries despite the requirements that at-risk individuals use hearing protection devices such as ear plugs or ear muffs. Drug-induced hearing loss is also a major quality-of-life issue with many patients experiencing clinically significant hearing loss as a side effect of treatment with life-saving drug agents such as cisplatin and aminoglycoside antibiotics. There are no pharmaceutical agents approved by the United States Food and Drug Administration for the purpose of protecting the inner ear against damage, and preventing associated hearing loss (otoprotection). However, a variety of preclinical studies have suggested promise, with some supporting data from clinical trials now being available as well. Additional research within this promising area is urgently needed.
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Affiliation(s)
- Colleen G Le Prell
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, Texas
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Ca v3.2 T-Type Calcium Channels Are Physiologically Mandatory for the Auditory System. Neuroscience 2019; 409:81-100. [PMID: 31029730 DOI: 10.1016/j.neuroscience.2019.04.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 04/11/2019] [Accepted: 04/12/2019] [Indexed: 02/07/2023]
Abstract
Voltage-gated Ca2+ channels (VGCCs) play key roles in auditory perception and information processing within the inner ear and brainstem. Pharmacological inhibition of low voltage-activated (LVA) T-type Ca2+ channels is related to both age- and noise induced hearing loss in experimental animals and may represent a promising approach to the treatment of auditory impairment of various etiologies. Within the LVA Ca2+ channel subgroup, Cav3.2 is the most prominently expressed T-type channel entity in the cochlea and auditory brainstem. Thus, we performed a complete gender specific click and tone burst based auditory brainstem response (ABR) analysis of Cav3.2+/- and Cav3.2-/- mice, including i.a. temporal progression in hearing loss, amplitude growth function and wave latency analysis as well as a cochlear qPCR based evaluation of other VGCCs transcripts. Our results, based on a self-programmed automated wavelet approach, demonstrate that both heterozygous and Cav3.2 null mutant mice exhibit age-dependent increases in hearing thresholds at 5 months of age. In addition, complex alterations in WI-IV amplitudes and latencies were detected that were not attributable to alterations in the expression of other VGCCs in the auditory tract. Our results clearly demonstrate the important physiological role of Cav3.2 VGCCs in the spatiotemporal organization of auditory processing in young adult mice and suggest potential pharmacological targets for interventions in the future.
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Yu Y, Hu B, Bao J, Mulvany J, Bielefeld E, Harrison RT, Neton SA, Thirumala P, Chen Y, Lei D, Qiu Z, Zheng Q, Ren J, Perez-Flores MC, Yamoah EN, Salehi P. Otoprotective Effects of Stephania tetrandra S. Moore Herb Isolate against Acoustic Trauma. J Assoc Res Otolaryngol 2018; 19:653-668. [PMID: 30187298 PMCID: PMC6249158 DOI: 10.1007/s10162-018-00690-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 07/08/2018] [Indexed: 01/10/2023] Open
Abstract
Noise is the most common occupational and environmental hazard, and noise-induced hearing loss (NIHL) is the second most common form of sensorineural hearing deficit. Although therapeutics that target the free-radical pathway have shown promise, none of these compounds is currently approved against NIHL by the United States Food and Drug Administration. The present study has demonstrated that tetrandrine (TET), a traditional Chinese medicinal alkaloid and the main chemical isolate of the Stephania tetrandra S. Moore herb, significantly attenuated NIHL in CBA/CaJ mice. TET is known to exert antihypertensive and antiarrhythmic effects through the blocking of calcium channels. Whole-cell patch-clamp recording from adult spiral ganglion neurons showed that TET blocked the transient Ca2+ current in a dose-dependent manner and the half-blocking concentration was 0.6 + 0.1 μM. Consistent with previous findings that modulations of calcium-based signaling pathways have both prophylactic and therapeutic effects against neural trauma, NIHL was significantly diminished by TET administration. Importantly, TET has a long-lasting protective effect after noise exposure (48 weeks) in comparison to 2 weeks after noise exposure. The otoprotective effects of TET were achieved mainly by preventing outer hair cell damage and synapse loss between inner hair cells and spiral ganglion neurons. Thus, our data indicate that TET has great potential in the prevention and treatment of NIHL.
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Affiliation(s)
- Yan Yu
- The First People’s Hospital of Zhangjiagang, 68 W Jiyang Road, Zhangjiagang City, 215600 Jiangsu China
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
| | - Bing Hu
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106 USA
- Department of Otolaryngology Head and Neck Surgery, The Second Xiangya Hospital of Central South University, Changsha, 440011 Hunan China
| | - Jianxin Bao
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
- Department of Research and Development, Gateway Biotechnology Inc., Rootstown, OH 44272 USA
| | - Jessica Mulvany
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
- Department of Research and Development, Gateway Biotechnology Inc., Rootstown, OH 44272 USA
| | - Eric Bielefeld
- Department of Speech and Hearing Science, Ohio State University, Columbus, OH 43210 USA
| | - Ryan T. Harrison
- Department of Speech and Hearing Science, Ohio State University, Columbus, OH 43210 USA
| | - Sarah A. Neton
- Department of Speech and Hearing Science, Ohio State University, Columbus, OH 43210 USA
| | - Partha Thirumala
- The University of Pittsburgh Medical Center, Suite B-400, 200 Lothrop Street, Pittsburgh, PA 15213 USA
| | - Yingying Chen
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
| | - Debin Lei
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
| | - Ziyu Qiu
- Department of Research and Development, Gateway Biotechnology Inc., Rootstown, OH 44272 USA
| | - Qingyin Zheng
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106 USA
| | - Jihao Ren
- Department of Otolaryngology Head and Neck Surgery, The Second Xiangya Hospital of Central South University, Changsha, 440011 Hunan China
| | - Maria Cristina Perez-Flores
- Department of Physiology and Cell Biology, University of Nevada Reno, 1664 North Virginia St, Reno, NV 89557 USA
| | - Ebenezer N. Yamoah
- Department of Physiology and Cell Biology, University of Nevada Reno, 1664 North Virginia St, Reno, NV 89557 USA
| | - Pezhman Salehi
- Translational Research Center, Northeast Ohio Medical University, Rootstown, OH 44272 USA
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Wu YJ, Li YS, Tseng WL, Lu CY. Microextraction combined with microderivatization for drug monitoring and protein modification analysis from limited blood volume using mass spectrometry. Anal Bioanal Chem 2018; 410:7405-7414. [PMID: 30191273 DOI: 10.1007/s00216-018-1349-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 08/18/2018] [Accepted: 08/28/2018] [Indexed: 12/15/2022]
Abstract
In the clinic, ethosuximide is commonly used to treat generalized absence seizures but has recently been repurposed for other diseases. Because of adverse effects and drug interactions, high-throughput therapeutic drug monitoring of ethosuximide is necessary. Microextraction is a simple, effective, rapid, and low consumption of organic solvents method for sample preparation. In this study, microderivatization-increased detection (MDID)-combined microextraction was used to detect ethosuximide by mass spectrometry. Ethosuximide is a difficult to retain and ionize compound in the C18 nano-flow column and ionization interface, respectively. Hence, we developed a fast method for detecting ethosuximide in human plasma by using the MDID strategy (within 2 min). Chemical microderivatization parameters were studied and optimized to increase the sensitivity of ethosuximide detection at trace levels. The linear range for the analysis of ethosuximide in 10 μL plasma was 5-500 μg/mL with a coefficient of determination (r2) ≥ 0.995. The precision and accuracy of intraday and interday analyses of ethosuximide were below 13.0%. Furthermore, modifications of major proteins in plasma and blood cells, induced by ethosuximide, were identified. The proposed method effectively utilizes microliter samples to detect drug plasma concentrations under suitable microextraction procedures toward the eco-friendly goal of low consumption of organic solvents. Graphical abstract ᅟ.
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Affiliation(s)
- Ying-Jung Wu
- Department of Biochemistry, College of Medicine, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
| | - Yi-Shan Li
- Department of Biochemistry, College of Medicine, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
| | - Wei-Lung Tseng
- Department of Chemistry, College of Science, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
| | - Chi-Yu Lu
- Department of Biochemistry, College of Medicine, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan.
- Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan.
- Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan.
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, 80708, Taiwan.
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Inner Ear Hair Cell Protection in Mammals against the Noise-Induced Cochlear Damage. Neural Plast 2018; 2018:3170801. [PMID: 30123244 PMCID: PMC6079343 DOI: 10.1155/2018/3170801] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 04/11/2018] [Accepted: 05/07/2018] [Indexed: 12/12/2022] Open
Abstract
Inner ear hair cells are mechanosensory receptors that perceive mechanical sound and help to decode the sound in order to understand spoken language. Exposure to intense noise may result in the damage to the inner ear hair cells, causing noise-induced hearing loss (NIHL). Particularly, the outer hair cells are the first and the most affected cells in NIHL. After acoustic trauma, hair cells lose their structural integrity and initiate a self-deterioration process due to the oxidative stress. The activation of different cellular death pathways leads to complete hair cell death. This review specifically presents the current understanding of the mechanism exists behind the loss of inner ear hair cell in the auditory portion after noise-induced trauma. The article also explains the recent hair cell protection strategies to prevent the damage and restore hearing function in mammals.
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Naples JG. Calcium-channel blockers as therapeutic agents for acquired sensorineural hearing loss. Med Hypotheses 2017; 104:121-125. [PMID: 28673569 DOI: 10.1016/j.mehy.2017.05.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 05/28/2017] [Accepted: 05/31/2017] [Indexed: 11/27/2022]
Abstract
Acquired sensorineural hearing loss represents a challenging clinical scenario. Currently, there are few approved therapies for treating this type of hearing loss, and diagnosis is often made after permanent damage has occurred. There are numerous etiologies for acquired hearing loss, with complex mechanisms underlying each cause. Despite these complexities, apoptosis of the structures within the inner ear, is a theme common to many forms of acquired hearing loss. Apoptosis is a calcium-dependent process, and within the inner ear, L- and T-type calcium channels are believed to contribute to calcium availability during this process. There are few studies limited to animal models evaluating the role of calcium-channel blockers (CCBs) as otoprotective agents in the setting of acquired hearing loss. Here, I hypothesize that CCBs will provide utility as a therapy against acquired forms of sensorineural hearing loss by preventing calcium influx that occurs during inner ear cellular apoptosis.
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Affiliation(s)
- James G Naples
- University of Connecticut Health Center, 263 Farmington Ave, Farmington, CT 06030, United States.
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19
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Noise-induced cochlear synaptopathy: Past findings and future studies. Hear Res 2017; 349:148-154. [DOI: 10.1016/j.heares.2016.12.008] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 11/08/2016] [Accepted: 12/08/2016] [Indexed: 01/12/2023]
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Jahani L, Mehrparvar AH, Esmailidehaj M, Rezvani ME, Moghbelolhossein B, Razmjooei Z. The Effect of Atorvastatin on Preventing Noise-Induced Hearing Loss: An Experimental Study. THE INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL MEDICINE 2016; 7:15-21. [PMID: 26772594 PMCID: PMC6816516 DOI: 10.15171/ijoem.2016.627] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 11/29/2015] [Indexed: 12/17/2022]
Abstract
Background: Noise-induced hearing loss (NIHL) is a common, irreversible occupational disease. Statins have recently been proposed to prevent NIHL. Objective: To assess the effect of atorvastatin for the prevention of NIHL in rats. Methods: In this experimental study, forty 2–3-month-old Wistar male rats were divided into 5 groups of 8 animals. 3 groups of rats received atorvastatin at doses of 5, 25, and 50 mg/kg daily for 14 days. The 4th group of rats received normal saline; another group was the control group. After 2 weeks of treatment, the rats were exposed to broad-band noise (125– 20 000 Hz) at 110 dB-SPL intensity for 2 hours. Response amplitude of all ears at 5 frequencies was assessed by distortion product otoacoustic emissions (DP-OAE) at baseline, 2 hours, and 2 weeks after the exposure. Results: Response amplitude was significantly decreased at all frequencies immediately after exposure to noise in all studied groups. The amplitude increased after 72 hours to a level higher than temporary threshold shift (TTS); this change was only significant in the group received 5 mg/kg atorvastatin. Conclusion: Low dose atorvastatin (5 mg/kg) used before exposure to noise can probably prevent NIHL in rats. This effect was not observed with higher doses of the drug.
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Affiliation(s)
- L Jahani
- Department of Occupational Medicine, Sadoughi University of Medical Sciences, Yazd, Iran.
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Ye R, Liu J, Jia Z, Wang H, Wang Y, Sun W, Wu X, Zhao Z, Niu B, Li X, Dai G, Li J. Adenosine Triphosphate (ATP) Inhibits Voltage-Sensitive Potassium Currents in Isolated Hensen's Cells and Nifedipine Protects Against Noise-Induced Hearing Loss in Guinea Pigs. Med Sci Monit 2016; 22:2006-12. [PMID: 27292522 PMCID: PMC4913814 DOI: 10.12659/msm.898150] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background There is increasing evidence that adenosine triphosphate (ATP), a well-known neurotransmitter and neuromodulator in the central nervous system, plays an important role as an extracellular chemical messenger in the cochlea. Material/Methods Using a whole-cell recording technique, we studied the effects of ATP on isolated Hensen’s cells, which are supporting cells in the cochlea, to determine if they are involved in the transduction of ions with hair cells. Results ATP (0.1–10 μM) reduced the potassium current (IK+) in the majority of the recorded Hensen’s cells (21 out of 25 cells). An inward current was also induced by high concentrations of ATP (100 μM to 10 mM), which was reversibly blocked by 100 μM suramin (a purinergic antagonist) and blocked by nifedipine (an L-type calcium channel blocker). After the cochleas were perfused with artificial perilymph solutions containing nifedipine and exposed to noise, the amplitude increase in the compound action potential (CAP) threshold and the reduction in cochlear microphonics was lower than when they were exposed to noise alone. Conclusions Our results suggest that ATP can block IK+ channels at a low concentration and induce an inward Ca2+ current at high concentrations, which is reversed by purinergic receptors. Nifedipine may have a partially protective effect on noise-induced hearing loss (NIHL).
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Affiliation(s)
- Rui Ye
- Department of Radiation Oncology, Chinese PLA General Hospital, Beijing, China (mainland)
| | - Jun Liu
- Department of Otolaryngology Head and Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China (mainland)
| | - Zhiying Jia
- , Xinjiang Cancer Hospital, Urumqi, Xinjiang, China (mainland)
| | - Hongyang Wang
- Department of Otolaryngology Head and Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China (mainland)
| | - YongAn Wang
- , Academy of Military Medical Sciences, Beijing, China (mainland)
| | - Wei Sun
- Center for Hearing & Deafness, State University of New York (SUNY) at Buffalo, Buffalo, NY, American Samoa
| | - Xuan Wu
- Department of Radiation Oncology, Hainan Branch of Chinese PLA General Hospital, Sanya, Hainan, China (mainland)
| | - Zhifei Zhao
- Department of Radiation Oncology, Chinese PLA General Hospital, Beijing, China (mainland)
| | - Baolong Niu
- Department of Radiation Oncology, Chinese PLA General Hospital, Beijing, China (mainland)
| | - Xingqi Li
- Department of Radiation Oncology, Chinese PLA General Hospital, Beijing, China (mainland)
| | - Guanghai Dai
- Department of Oncology, Chinese PLA General Hospital, Beijing, China (mainland)
| | - Jianxiong Li
- Department of Radiation Oncology, Chinese PLA General Hospital, Beijing, China (mainland)
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Pharmacological agents used for treatment and prevention in noise-induced hearing loss. Eur Arch Otorhinolaryngol 2016; 273:4089-4101. [DOI: 10.1007/s00405-016-3936-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 02/10/2016] [Indexed: 12/20/2022]
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23
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Naples JG, Parham K. Cisplatin-Induced Ototoxicity and the Effects of Intratympanic Diltiazem in a Mouse Model. Otolaryngol Head Neck Surg 2015; 154:144-9. [DOI: 10.1177/0194599815606704] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 08/27/2015] [Indexed: 02/04/2023]
Abstract
Objective To evaluate whether the calcium-channel blocker diltiazem has protective effects against cisplatin-induced ototoxicity in a mouse model. Study Design Original basic science in vivo investigation. Setting Academic setting: Otolaryngology–Head and Neck Surgery laboratory at University of Connecticut Health Center. Subjects Thirty-nine female CBA/J mice. Methods Pure tone– or click-evoked auditory brainstem responses (ABRs) were recorded in CBA/J mice to determine auditory thresholds. All mice had baseline ABRs recorded. They were then given a single cisplatin bolus (14 mg/kg), followed by 5 consecutive days of intratympanic diltiazem or saline control. Follow-up thresholds were recorded on days 7, 14, and 21 postcisplatin. Tone-evoked ABRs evaluated the otoprotective effect of 2-mg/kg diltiazem in 9 mice, and dose effect was examined in response to click-evoked ABR with 2- or 4-mg/kg diltiazem in 2 groups of 15 mice. Results Saline-treated ears had significantly elevated tone-evoked auditory thresholds when compared with diltiazem-treated ears ( P = .038) on day 7 postcisplatin only. Click-evoked ABR thresholds were significantly elevated in saline-treated ears versus diltiazem-treated ears for the 2-mg/kg group ( P = .001) and 4-mg/kg group ( P = .011) on days 7, 14, and 21 postcisplatin. Conclusion Intratympanic diltiazem has significant protective effects against cisplatin ototoxicity at 2 and 4 mg/kg. This is the first in vivo study to demonstrate that diltiazem offers a potentially novel therapy for cisplatin-induced ototoxicity.
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Affiliation(s)
- James G. Naples
- University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Kourosh Parham
- University of Connecticut Health Center, Farmington, Connecticut, USA
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Tang J, Qian Y, Li H, Kopecky BJ, Ding D, Ou HC, DeCook R, Chen X, Sun Z, Kobel M, Bao J. Canertinib induces ototoxicity in three preclinical models. Hear Res 2015; 328:59-66. [PMID: 26163095 DOI: 10.1016/j.heares.2015.07.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 06/23/2015] [Accepted: 07/03/2015] [Indexed: 12/16/2022]
Abstract
Neuregulin-1 (NRG1) ligand and its epidermal growth factor receptor (EGFR)/ERBB family regulate normal cellular proliferation and differentiation in many tissues including the cochlea. Aberrant NRG1 and ERBB signaling cause significant hearing impairment in mice. Dysregulation of the same signaling pathway in humans is involved in certain types of cancers such as breast cancer or non-small cell lung cancer (NSCLC). A new irreversible pan-ERBB inhibitor, canertinib, has been tested in clinical trials for the treatment of refractory NSCLC. Its possible ototoxicity was unknown. In this study, a significant dose-dependent canertinib ototoxicity was observed in a zebrafish model. Canertinib ototoxicity was further confirmed in two mouse models with different genetic backgrounds. The data strongly suggested an evolutionally preserved ERBB molecular mechanism underlying canertinib ototoxicity. Thus, these results imply that clinical monitoring of hearing loss should be considered for clinical testing of canertinib or other pan-ERBB inhibitors.
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Affiliation(s)
- Jian Tang
- Department of Otolaryngology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Thoracic Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China
| | - Yi Qian
- Department of Cardio-Thoracic Surgery, The Third Affiliated Hospital of Nantong University, Wuxi 214041, China
| | - Hui Li
- Department of Otolaryngology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, OH 44272, USA
| | - Benjamin J Kopecky
- Department of Otolaryngology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Dalian Ding
- Center for Hearing and Deafness, State University of New York at Buffalo, 137 Cary Hall, 3435 Main Street, Buffalo, NY 14214, USA
| | - Henry C Ou
- Department of Pediatrics, Seattle Children's Hospital, Seattle, WA, USA; Department of Otolaryngology, University of Washington, Seattle, WA, USA
| | - Rhonda DeCook
- Department of Statistics and Actuarial Science, University of Iowa, Iowa City, IA 52242, USA
| | - Xiaojie Chen
- Gateway Biotechnology Inc., St. Louis, MO 63108, USA
| | - Zhenyu Sun
- Department of Cardio-Thoracic Surgery, The Third Affiliated Hospital of Nantong University, Wuxi 214041, China
| | - Megan Kobel
- Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH 44272, USA
| | - Jianxin Bao
- Department of Otolaryngology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Anatomy and Neurobiology, Northeast Ohio Medical University, Rootstown, OH 44272, USA.
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Wang DL, Li H, Liang R, Bao J. Identification of multiple metabolic enzymes from mice cochleae tissue using a novel functional proteomics technology. PLoS One 2015; 10:e0121826. [PMID: 25811366 PMCID: PMC4374962 DOI: 10.1371/journal.pone.0121826] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 02/04/2015] [Indexed: 11/19/2022] Open
Abstract
A new type of technology in proteomics was developed in order to separate a complex protein mixture and analyze protein functions systematically. The technology combines the ability of two-dimensional gel electrophoresis (2-DE) to separate proteins with a protein elution plate (PEP) to recover active proteins for functional analysis and mass spectrometry (MS)-based identification. In order to demonstrate the feasibility of this functional proteomics approach, NADH and NADPH-dependent oxidases, major redox enzyme families, were identified from mice cochlear tissue after a specific drug treatment. By comparing the enzymatic activity between mice that were treated with a drug and a control group significant changes were observed. Using MS, five NADH-dependent oxidases were identified that showed highly altered enzymatic activities due to the drug treatment. In essence, the PEP technology allows for a systematic analysis of a large enzyme family from a complex proteome, providing insights in understanding the mechanism of drug treatment.
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Affiliation(s)
- David L. Wang
- Department of Biology, Vanderbilt University, Nashville, TN, United States of America
| | - Hui Li
- Department of Otolaryngology, School of Medicine, Washington University, St. Louis, MO, United States of America
| | - Ruqiang Liang
- Department of Otolaryngology, School of Medicine, Washington University, St. Louis, MO, United States of America
| | - Jianxin Bao
- Department of Otolaryngology, School of Medicine, Washington University, St. Louis, MO, United States of America
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Bielefeld EC. Protection from noise-induced hearing loss with Src inhibitors. Drug Discov Today 2015; 20:760-5. [PMID: 25637168 DOI: 10.1016/j.drudis.2015.01.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 12/09/2014] [Accepted: 01/20/2015] [Indexed: 01/23/2023]
Abstract
Noise-induced hearing loss is a major cause of acquired hearing loss around the world and pharmacological approaches to protecting the ear from noise are under investigation. Noise results in a combination of mechanical and metabolic damage pathways in the cochlea. The Src family of protein tyrosine kinases could be active in both pathways and Src inhibitors have successfully prevented noise-induced cochlear damage and hearing loss in animal models. The long-term goal is to optimize delivery methods into the cochlea to reduce invasiveness and limit side-effects before human clinical testing can be considered. At their current early stage of research investigation, Src inhibitors represent an exciting class of compounds for inclusion in a multifaceted pharmacological approach to protecting the ear from noise.
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Affiliation(s)
- Eric C Bielefeld
- Department of Speech and Hearing Science, The Ohio State University, 110 Pressey Hall, 1070 Carmack Road, Columbus, OH 43210, USA.
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Mukherjea D, Ghosh S, Bhatta P, Sheth S, Tupal S, Borse V, Brozoski T, Sheehan KE, Rybak LP, Ramkumar V. Early investigational drugs for hearing loss. Expert Opin Investig Drugs 2014; 24:201-17. [PMID: 25243609 DOI: 10.1517/13543784.2015.960076] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Sensorineural hearing loss (HL) is becoming a global phenomenon at an alarming rate. Nearly 600 million people have been estimated to have significant HL in at least one ear. There are several different causes of sensorineural HL included in this review of new investigational drugs for HL. They are noise-induced, drug-induced, sudden sensorineural HL, presbycusis and HL due to cytomegalovirus infections. AREAS COVERED This review presents trends in research for new investigational drugs encompassing a variety of causes of HL. The studies presented here are the latest developments either in the research laboratories or in preclinical, Phase 0, Phase I or Phase II clinical trials for drugs targeting HL. EXPERT OPINION While it is important that prophylactic measures are developed, it is extremely crucial that rescue strategies for unexpected or unavoidable cochlear insult be established. To achieve this goal for the development of drugs for HL, innovative strategies and extensive testing are required for progress from the bench to bedside. However, although a great deal of research needs to be done to achieve the ultimate goal of protecting the ear against acquired sensorineural HL, we are likely to see exciting breakthroughs in the near future.
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Affiliation(s)
- Debashree Mukherjea
- Southern Illinois University School of Medicine, Department of Surgery , P.O. Box 19629, Springfield, IL 62794-9629 , USA
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Kopecky BJ, Liang R, Bao J. T-type calcium channel blockers as neuroprotective agents. Pflugers Arch 2014; 466:757-65. [PMID: 24563219 DOI: 10.1007/s00424-014-1454-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 01/15/2014] [Accepted: 01/19/2014] [Indexed: 01/12/2023]
Abstract
T-type calcium channels are expressed in many diverse tissues, including neuronal, cardiovascular, and endocrine. T-type calcium channels are known to play roles in the development, maintenance, and repair of these tissues but have also been implicated in disease when not properly regulated. Calcium channel blockers have been developed to treat various diseases and their use clinically is widespread due to both their efficacy as well as their safety. Aside from their established clinical applications, recent studies have suggested neuroprotective effects of T-type calcium channel blockers. Many of the current T-type calcium channel blockers could act on other molecular targets besides T-type calcium channels making it uncertain whether their neuroprotective effects are solely due to blocking of T-type calcium channels. In this review, we discuss these drugs as well as newly developed chemical compounds that are designed to be more selective for T-type calcium channels. We review in vitro and in vivo evidence of neuroprotective effects by these T-type calcium channel blockers. We conclude by discussing possible molecular mechanisms underlying the neuroprotective effects by T-type calcium channel blockers.
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Affiliation(s)
- Benjamin J Kopecky
- Department of Otolaryngology, Center for Aging, Washington University School of Medicine, 4560 Clayton Avenue, St. Louis, MO, 63110, USA
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