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Simms SS, Milani MN, Kim MJ, Husain R, Infante L, Cooke PS, Someya S. Loss of Esr1 Does Not Affect Hearing and Balance. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.03.583163. [PMID: 38496399 PMCID: PMC10942324 DOI: 10.1101/2024.03.03.583163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Although estrogen affects the structure and function of the nervous system and brain and has a number of effects on cognition, its roles in the auditory and vestibular systems remain unclear. The actions of estrogen are mediated predominately through two classical nuclear estrogen receptors, estrogen receptor 1 (ESR1) and estrogen receptor 2 (ESR2). In the current study, we investigated the roles of ESR1 in normal auditory function and balance performance using 3-month-old wild-type (WT) and Esr1 knockout (KO) mice on a CBA/CaJ background, a normal-hearing strain. As expected, body weight of Esr1 KO females was lower than that of Esr1 KO males. Body weight of Esr1 KO females was higher than that of WT females, while there was no difference in body weight between WT and Esr1 KO males. Similarly, head diameter was higher in Esr1 KO vs. WT females. Contrary to our expectations, there were no differences in auditory brainstem response (ABR) thresholds, ABR waves I-V amplitudes and ABR waves I-V latencies at 8, 16, 32, and 48 kHz, distortion product otoacoustic emission (DPOAE) thresholds and amplitudes at 8, 16, and 32 kHz, and rotarod balance performance (latency to fall) between WT and Esr1 KO mice. Furthermore, there were no sex differences in ABRs, DPOAEs, and rotarod balance performance in Esr1 KO mice. Taken together, our findings show that Esr1 deficiency does not affect auditory function or balance performance in normal hearing mice, and suggest that loss of Esr1 is likely compensated by ESR2 or other estrogen receptors to maintain the structure and function of the auditory and vestibular systems under normal physiological conditions.
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Affiliation(s)
- Shion S Simms
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
- Department of Speech, Language, and Hearing Sciences, University of Florida, Gainesville, FL, USA
| | - Marcus N Milani
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
| | - Mi-Jung Kim
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
| | - Ryan Husain
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
| | - Laura Infante
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
- Department of Speech, Language, and Hearing Sciences, University of Florida, Gainesville, FL, USA
| | - Paul S Cooke
- Department of Physiological Sciences, University of Florida, Gainesville, FL, USA
| | - Shinichi Someya
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
- Department of Speech, Language, and Hearing Sciences, University of Florida, Gainesville, FL, USA
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Ordiway G, McDonnell M, Sanchez JT. Revisiting the Chicken Auditory Brainstem Response: Frequency Specificity, Threshold Sensitivity, and Cross Species Comparison. Neurosci Insights 2024; 19:26331055241228308. [PMID: 38304551 PMCID: PMC10832403 DOI: 10.1177/26331055241228308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 01/09/2024] [Indexed: 02/03/2024] Open
Abstract
The auditory brainstem response (ABR) is important for both clinical and basic auditory research. It is a non-invasive measure of hearing function with millisecond-level precision. The ABR can not only measure the synchrony, speed, and efficacy of auditory physiology but also detect different modalities of hearing pathology and hearing loss. ABRs are easily acquired in vertebrate animal models like reptiles, birds, and mammals, and complement existing molecular, developmental, and systems-level research. One such model system is the chicken; an excellent animal for studying auditory development, structure, and function. However, the ABR for chickens was last reported nearly 4 decades ago. The current study examines how decades of ABR characterization in other animal species support findings from the chicken ABR. We replicated and expanded on previous research using 43 chicken hatchlings 1- and 2-day post-hatch. We report that click-evoked chicken ABRs presented with a peak waveform morphology, amplitude, and latency like previous avian studies. Tone-evoked ABRs were found for frequencies from 250 to 4000 Hertz (Hz) and exhibited a range of best sensitivity between 750 and 2000 Hz. Objective click-evoked and tone-evoked ABR thresholds were comparable to subjective thresholds. With these revisited measurements, the chicken ABR still proves to be an excellent example of precocious avian development that complements decades of molecular, neuronal, and systems-level research in the same model organism.
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Affiliation(s)
- George Ordiway
- Roxelyn and Richard Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL, USA
- Central Auditory Physiology Laboratory, Northwestern University, Evanston, IL, USA
| | - Miranda McDonnell
- Roxelyn and Richard Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL, USA
- Central Auditory Physiology Laboratory, Northwestern University, Evanston, IL, USA
| | - Jason Tait Sanchez
- Roxelyn and Richard Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL, USA
- Central Auditory Physiology Laboratory, Northwestern University, Evanston, IL, USA
- Knowles Hearing Research Center, Northwestern University, Evanston, IL, USA
- Department of Neurobiology, Northwestern University, Evanston, IL, USA
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Park CR, Willott JF, Walton JP. Age-related changes of auditory sensitivity across the life span of CBA/CaJ mice. Hear Res 2024; 441:108921. [PMID: 38042127 PMCID: PMC10843596 DOI: 10.1016/j.heares.2023.108921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 10/29/2023] [Accepted: 11/20/2023] [Indexed: 12/04/2023]
Abstract
The inbred mouse strain CBA/CaJ is a frequently used animal model of age-related hearing loss in humans. These mice display significant hearing loss at a relatively advanced age, similar to most humans, with progressive loss of hearing as the mouse continues to age. While important descriptions of hearing loss in this mouse strain at multiple ages have previously been published, shortcomings persist in the data for hearing over the lifespan of the mouse. Therefore, we analyzed auditory brainstem response threshold data from records maintained by our research group to yield an extensive database of thresholds over nearly the entire life span of the CBA/CaJ mouse (from 79 to 1085 days). Data was collected from in-house bred mice of CBA/CaJ stock, initially from The Jackson Laboratory. Data was collected using BiosigRZ software and TDT System III hardware. Thresholds were routinely measured in conjunction with behavioral and electrophysiological experiments; only responses from baseline or experimentally naïve animals were analyzed. The resulting data set comprised 376 female mice and 441 males. At the lowest and highest frequencies (8 & 32 kHz), initial thresholds were just under 30 dB SPL and increased slowly until they were significantly different at 16-18 months compared to 1-3 months age, with the difference increasing over subsequent ages. At the middle frequencies (12 & 16 kHz), initial thresholds were just under 20 dB SPL and increased until they became different from initial at 16-18 months. At 24 kHz, initial thresholds were just above 20 dB and became different from initial at 13-16 months of age. The rate of change of thresholds with age were similar for all frequencies until about 30 months of age, when 32 kHz threshold changes lagged behind other frequencies. Generally, CBA/CaJ mice in our colony display relatively low thresholds until approximately 16 months of age, depending on frequency. After 16-18 months, thresholds become significantly worse. After approximately 20-22 months thresholds increase linearly with age.
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Affiliation(s)
- Collin R Park
- Global Center for Hearing and Speech Research, University of South Florida, Tampa, FL, United States; Department of Communication Sciences and Disorders, University of South Florida, Tampa, FL, United States
| | - James F Willott
- Department of Communication Sciences and Disorders, University of South Florida, Tampa, FL, United States
| | - Joseph P Walton
- Global Center for Hearing and Speech Research, University of South Florida, Tampa, FL, United States; Department of Communication Sciences and Disorders, University of South Florida, Tampa, FL, United States.
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Burke K, Burke M, Lauer AM. Auditory brainstem response (ABR) waveform analysis program. MethodsX 2023; 11:102414. [PMID: 37846351 PMCID: PMC10577057 DOI: 10.1016/j.mex.2023.102414] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 10/03/2023] [Indexed: 10/18/2023] Open
Abstract
Auditory brainstem responses (ABR) are a high-throughput assessment of auditory function. Many studies determine changes to the threshold at frequencies that span the normal hearing range of their test subjects, but fewer studies evaluate changes in waveform morphology. The goal of developing this program was to make a user-friendly semiautomatic peak-detection algorithm to encourage widespread analysis of the amplitudes and latencies of the ABR, which may yield informative details about the integrity of the auditory system with development, aging, genetic manipulations, or damaging conditions. This method incorporates automated peak detection with manual override and inter-rater validation to calculate the amplitude and latency for waves 1-5, as well as interpeak latencies and amplitude ratios between waves. The output includes raw data and calculations in a format compatible with graphical and statistical software.•The method yields a high-throughput peak-detection algorithm with manual override and inter-rater capabilities to streamline ABR waveform analysis.•Data output includes amplitudes, latencies, amplitude ratios, and interpeak latencies for generation of input-output curves.•While complete automation of peak detection with this tool is dependent on good signal-to-noise ratios, relevant amplitude and latency calculations are fully automated, and manual spot-checking is simplified to significantly reduce the time to analyze waveforms.
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Affiliation(s)
- Kali Burke
- Department of Otolaryngology- Head and Neck Surgery at Johns Hopkins University School of Medicine, 720 Rutland Ave, Baltimore, MD 21205, USA
| | - Matthew Burke
- Hexagon Manufacturing Intelligence, 624 Grassmere Park Suite 7, Nashville TN 37214, USA
| | - Amanda M. Lauer
- Department of Otolaryngology- Head and Neck Surgery at Johns Hopkins University School of Medicine, 720 Rutland Ave, Baltimore, MD 21205, USA
- Department of Neuroscience at Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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Panksepp JB, Lahvis GP. Sociability versus empathy in adolescent mice: Different or distinctive? LEARNING AND MOTIVATION 2023; 83:101892. [PMID: 37614811 PMCID: PMC10443922 DOI: 10.1016/j.lmot.2023.101892] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
In recent years, a growing number of pre-clinical studies have made use of the social abilities of mice, asking how gene variants (e.g., null, transgenic or mutant alleles) give rise to abnormalities in neurodevelopment. Two distinct courses of research provide the foundation for these studies. One course has mostly focused on how we can assess "sociability" using metrics, often automated, to quantitate mouse approach and withdrawal responses to a variety of social stimuli. The other course has focused on psychobiological constructs that underlie the socio-emotional capacities of mice, including motivation, reward and empathy. Critically, we know little about how measures of mouse sociability align with their underlying socio-emotional capacities. In the present work, we compared the expression of sociability in adolescent mice from several strains versus a precisely defined behavioral model of empathy that makes use of a vicarious fear learning paradigm. Despite substantial strain-dependent variation within each behavioral domain, we found little evidence of a relationship between these social phenotypes (i.e., the rank order of strain differences was unique for each test). By contrast, emission of ultrasonic vocalizations was highly associated with sociability, suggesting that these two measures reflect the same underlying construct. Taken together, our results indicate that sociability and vicarious fear learning are not manifestations of a single, overarching social trait. These findings thus underscore the necessity for a robust and diverse set of measures when using laboratory mice to model the social dimensions of neuropsychiatric disorders.
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Affiliation(s)
- Jules B. Panksepp
- University of Wisconsin, Waisman Center, 1500 Highland Ave. Madison, WI, 53705, USA
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Deng Z, Butt T, Arhatari BD, Darido C, Auden A, Swaroop D, Partridge DD, Haigh K, Nguyen T, Haigh JJ, Carpinelli MR, Jane SM. Dysregulation of Grainyhead-like 3 expression causes widespread developmental defects. Dev Dyn 2023; 252:647-667. [PMID: 36606449 PMCID: PMC10952483 DOI: 10.1002/dvdy.565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 12/19/2022] [Accepted: 12/30/2022] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND The gene encoding the transcription factor, Grainyhead-like 3 (Grhl3), plays critical roles in mammalian development and homeostasis. Grhl3-null embryos exhibit thoraco-lumbo-sacral spina bifida and soft-tissue syndactyly. Additional studies reveal that these embryos also exhibit an epidermal proliferation/differentiation imbalance. This manifests as skin barrier defects resulting in peri-natal lethality and defective wound repair. Despite these extensive analyses of Grhl3 loss-of-function models, the consequences of gain-of-function of this gene have been difficult to achieve. RESULTS In this study, we generated a novel mouse model that expresses Grhl3 from a transgene integrated in the Rosa26 locus on an endogenous Grhl3-null background. Expression of the transgene rescues both the neurulation and skin barrier defects of the knockout mice, allowing survival into adulthood. Despite this, the mice are not normal, exhibiting a range of phenotypes attributable to dysregulated Grhl3 expression. In mice homozygous for the transgene, we observe a severe Shaker-Waltzer phenotype associated with hearing impairment. Micro-CT scanning of the inner ear revealed profound structural alterations underlying these phenotypes. In addition, these mice exhibit other developmental anomalies including hair loss, digit defects, and epidermal dysmorphogenesis. CONCLUSION Taken together, these findings indicate that diverse developmental processes display low tolerance to dysregulation of Grhl3.
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Affiliation(s)
- Zihao Deng
- Department of Medicine (Alfred Hospital), Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Tariq Butt
- Department of Medicine (Alfred Hospital), Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Benedicta D. Arhatari
- ARC Centre of Excellence in Advanced Molecular Imaging, Department of Chemistry and PhysicsLa Trobe UniversityBundooraVictoriaAustralia
- Australian Synchrotron, ANSTOClaytonVictoriaAustralia
| | - Charbel Darido
- Peter MacCallum Cancer CentreMelbourneVictoriaAustralia
- Sir Peter MacCallum Department of OncologyThe University of MelbourneParkvilleVictoriaAustralia
| | - Alana Auden
- Department of Medicine (Alfred Hospital), Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Dijina Swaroop
- Department of Medicine (Alfred Hospital), Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Darren D. Partridge
- Department of Medicine (Alfred Hospital), Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Katharina Haigh
- Department of Pharmacology and Therapeutics, Rady Faculty of Health SciencesUniversity of ManitobaWinnipegManitobaCanada
- Research Institute in Oncology and HematologyCancerCare ManitobaWinnipegManitobaCanada
| | - Thao Nguyen
- Australian Centre for Blood Diseases, Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Jody J. Haigh
- Department of Pharmacology and Therapeutics, Rady Faculty of Health SciencesUniversity of ManitobaWinnipegManitobaCanada
- Research Institute in Oncology and HematologyCancerCare ManitobaWinnipegManitobaCanada
| | - Marina R. Carpinelli
- Department of Medicine (Alfred Hospital), Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
| | - Stephen M. Jane
- Department of Medicine (Alfred Hospital), Central Clinical SchoolMonash UniversityMelbourneVictoriaAustralia
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7
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Tang H, Zhang S, Tian Y, Kang T, Zhou C, Yang S, Liu Y, Liu X, Chen Q, Xiao H, Chen W, Zang J. Bioinspired Soft Elastic Metamaterials for Reconstruction of Natural Hearing. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023:e2207273. [PMID: 37114826 PMCID: PMC10369269 DOI: 10.1002/advs.202207273] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 03/28/2023] [Indexed: 06/19/2023]
Abstract
Natural hearing which means hearing naturally like normal people is critical for patients with hearing loss to participate in life. Cochlear implants have enabled numerous severe hearing loss patients to hear voice functionally, while cochlear implant users can hardly distinguish different tones or appreciate music subject to the absence of rate coding and insufficient frequency channels. Here a bioinspired soft elastic metamaterial that reproduces the shape and key functions of the human cochlea is reported. Inspired by human cochlea, the metamaterials are designed to possess graded microstructures with high effective refractive index distributed on a spiral shape to implement position-related frequency demultiplexing, passive sound enhancements of 10 times, and high-speed parallel processing of 168-channel sound/piezoelectric signals. Besides, it is demonstrated that natural hearing artificial cochlea has fine frequency resolution up to 30 Hz, a wide audible range from 150-12 000 Hz, and a considerable output voltage that can activate the auditory pathway in mice. This work blazes a promising trail for reconstruction of natural hearing in patients with severe hearing loss.
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Affiliation(s)
- Hanchuan Tang
- School of Integrated Circuits and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Shujie Zhang
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Ye Tian
- School of Integrated Circuits and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Tianyu Kang
- School of Integrated Circuits and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Cheng Zhou
- School of Integrated Circuits and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Shuaikang Yang
- School of Integrated Circuits and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Ying Liu
- School of Integrated Circuits and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Xurui Liu
- School of Integrated Circuits and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Qicai Chen
- School of Life Sciences, Central China Normal University, Wuhan, 430074, China
| | - Hongjun Xiao
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Wei Chen
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Jianfeng Zang
- School of Integrated Circuits and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China
- The State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
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8
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Cheng Y, Chen R, Su B, Zhang G, Sun Y, An P, Fang Y, Zhang Y, Shan Y, de Villers-Sidani É, Wang Y, Zhou X. Pairing with Enriched Sound Exposure Restores Auditory Processing Degraded by an Antidepressant. J Neurosci 2023; 43:2850-2859. [PMID: 36948582 PMCID: PMC10124948 DOI: 10.1523/jneurosci.2027-22.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 03/02/2023] [Accepted: 03/09/2023] [Indexed: 03/24/2023] Open
Abstract
Antidepressants, while effective in treating depression and anxiety disorders, also induce deficits in sensory (particularly auditory) processing, which in turn may exacerbate psychiatric symptoms. How antidepressants cause auditory signature deficits remains largely unknown. Here, we found that fluoxetine-treated adult female rats were significantly less accurate when performing a tone-frequency discrimination task compared with age-matched control rats. Their cortical neurons also responded less selectively to sound frequencies. The degraded behavioral and cortical processing was accompanied by decreased cortical perineuronal nets, particularly those wrapped around parvalbumin-expressing inhibitory interneurons. Furthermore, fluoxetine induced critical period-like plasticity in their already mature auditory cortices; therefore, a brief rearing of these drug-treated rats under an enriched acoustic environment renormalized auditory processing degraded by fluoxetine. The altered cortical expression of perineuronal nets was also reversed as a result of enriched sound exposure. These findings suggest that the adverse effects of antidepressants on auditory processing, possibly because of a reduction in intracortical inhibition, can be substantially alleviated by simply pairing drug treatment with passive, enriched sound exposure. They have important implications for understanding the neurobiological basis of antidepressant effects on hearing and for designing novel pharmacological treatment strategies for psychiatric disorders.SIGNIFICANCE STATEMENT Clinical experience suggests that antidepressants adversely affect sensory (particularly auditory) processing, which can exacerbate patients' psychiatric symptoms. Here, we show that the antidepressant fluoxetine reduces cortical inhibition in adult rats, leading to degraded behavioral and cortical spectral processing of sound. Importantly, fluoxetine induces a critical period-like state of plasticity in the mature cortex; therefore, a brief rearing under an enriched acoustic environment is sufficient to reverse the changes in auditory processing caused by the administration of fluoxetine. These results provide a putative neurobiological basis for the effects of antidepressants on hearing and indicate that antidepressant treatment combined with enriched sensory experiences could optimize clinical outcomes.
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Affiliation(s)
- Yuan Cheng
- Key Laboratory of Brain Functional Genomics of Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
- New York University-East China Normal University Institute of Brain and Cognitive Science, New York University-Shanghai, Shanghai, 200062, China
| | - Ruru Chen
- Key Laboratory of Brain Functional Genomics of Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
- New York University-East China Normal University Institute of Brain and Cognitive Science, New York University-Shanghai, Shanghai, 200062, China
| | - Bowen Su
- Key Laboratory of Brain Functional Genomics of Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
- New York University-East China Normal University Institute of Brain and Cognitive Science, New York University-Shanghai, Shanghai, 200062, China
| | - Guimin Zhang
- Key Laboratory of Brain Functional Genomics of Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
- New York University-East China Normal University Institute of Brain and Cognitive Science, New York University-Shanghai, Shanghai, 200062, China
| | - Yutian Sun
- Key Laboratory of Brain Functional Genomics of Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
- New York University-East China Normal University Institute of Brain and Cognitive Science, New York University-Shanghai, Shanghai, 200062, China
| | - Pengying An
- Key Laboratory of Brain Functional Genomics of Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
- New York University-East China Normal University Institute of Brain and Cognitive Science, New York University-Shanghai, Shanghai, 200062, China
| | - Yue Fang
- Key Laboratory of Brain Functional Genomics of Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
- New York University-East China Normal University Institute of Brain and Cognitive Science, New York University-Shanghai, Shanghai, 200062, China
| | - Yifan Zhang
- Key Laboratory of Brain Functional Genomics of Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
- New York University-East China Normal University Institute of Brain and Cognitive Science, New York University-Shanghai, Shanghai, 200062, China
| | - Ye Shan
- Key Laboratory of Brain Functional Genomics of Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
| | - Étienne de Villers-Sidani
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Quebec Canada
| | - Yunfeng Wang
- ENT institute and Department of Otorhinolaryngology of Eye & ENT Hospital, NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, 200031, China
| | - Xiaoming Zhou
- Key Laboratory of Brain Functional Genomics of Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
- New York University-East China Normal University Institute of Brain and Cognitive Science, New York University-Shanghai, Shanghai, 200062, China
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9
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Transient hearing abnormalities precede social deficits in a mouse model of autism. Behav Brain Res 2023; 437:114149. [PMID: 36206820 DOI: 10.1016/j.bbr.2022.114149] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 09/30/2022] [Accepted: 10/03/2022] [Indexed: 11/13/2022]
Abstract
Hearing abnormalities are important symptoms of autism spectrum disorders (ASDs), a neurological and developmental disorder. However, the characteristics of hearing abnormalities associated with ASD during development have not been fully investigated. We found that in Shank3B knockout mice (a high-confidence mouse model of ASD), transient hearing abnormalities can be found in auditory brainstem response, auditory cortical activity, as well as acoustic startle response. More importantly, all hearing abnormalities at 4 weeks were most prominent and preceded the onset of social deficits at 6 weeks. These hearing abnormalities gradually recovered with age. In addition, analysis of ABR data at 4 weeks using Support Vector Machine (SVM) can faithfully predict the genotype of mice with an accuracy of 85.71%. These findings not only revealed hearing changes in Shank3B knockout autistic-like mice during development, but also suggested that hearing abnormalities could potentially be used as an early and effective indicator of ASD risk.
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10
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Kim MJ, Carmichael PB, Bose U, Honkura Y, Suzuki J, Ding D, Erfe SL, Simms SS, Avaiya KA, Milani MN, Rymer EJ, Fragnito DT, Strom N, Salvi R, Someya S. Sex differences in body composition, voluntary wheel running activity, balance performance, and auditory function in CBA/CaJ mice across the lifespan. Hear Res 2023; 428:108684. [PMID: 36599258 DOI: 10.1016/j.heares.2022.108684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 12/12/2022] [Accepted: 12/26/2022] [Indexed: 12/28/2022]
Abstract
Hearing loss is the third most prevalent chronic health condition affecting older adults and age-related hearing loss (ARHL) is the most common form of hearing impairment. Significant sex differences in hearing have been documented in humans and rodents. In general, the results of these studies show that men lose their hearing more rapidly than women. However, the cellular mechanism underlying sex differences in hearing or hearing loss remains largely unknown, and to our knowledge, there is no well-established animal model for studying sex differences in hearing. In the current study, we examined sex differences in body composition, voluntary wheel running activity, balance performance, auditory function, and cochlear histology in young, middle-age, and old CBA/CaJ mice, a model of age-related hearing loss. As expected, body weight of young females was lower than that of males. Similarly, lean mass and total water mass of young, middle-age, and old females were lower than those of males. Young females showed higher voluntary wheel running activity during the dark cycle, an indicator of mobility, physical activity, and balance status, compared to males. Young females also displayed higher auditory brainstem response (ABR) wave I amplitudes at 8 kHz, wave II, III, V amplitudes at 8 and 48 kHz, and wave IV/I and V/I amplitude ratios at 48 kHz compared to males. Collectively, our findings suggest that the CBA/CaJ mouse strain is a useful model to study the cellular mechanisms underlying sex differences in physical activity and hearing.
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Affiliation(s)
- Mi-Jung Kim
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
| | - Peter B Carmichael
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
| | - Upal Bose
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
| | - Yohei Honkura
- Department of Otolaryngology-Head &Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Jun Suzuki
- Department of Otolaryngology-Head &Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Dalian Ding
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, USA
| | - Samantha L Erfe
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA; Department of Speech, Language, and Hearing Sciences, University of Florida, Gainesville, FL, USA
| | - Shion S Simms
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
| | - Kishan A Avaiya
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
| | - Marcus N Milani
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA
| | - Elizabeth J Rymer
- Department of Speech, Language, and Hearing Sciences, University of Florida, Gainesville, FL, USA
| | - Daniella T Fragnito
- Department of Speech, Language, and Hearing Sciences, University of Florida, Gainesville, FL, USA
| | - Nathan Strom
- Department of Speech, Language, and Hearing Sciences, University of Florida, Gainesville, FL, USA
| | - Richard Salvi
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, USA
| | - Shinichi Someya
- Department of Physiology and Aging, University of Florida, Gainesville, FL, USA; Department of Speech, Language, and Hearing Sciences, University of Florida, Gainesville, FL, USA.
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11
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Stahl AN, Mondul JA, Alek KA, Hackett TA, Ramachandran R. Audiologic characterization using clinical physiological measures: Normative data from macaque monkeys. Hear Res 2022; 424:108568. [PMID: 35896044 PMCID: PMC9529828 DOI: 10.1016/j.heares.2022.108568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 06/28/2022] [Accepted: 07/08/2022] [Indexed: 12/16/2022]
Abstract
Clinical auditory physiological measures (e.g., auditory brainstem responses, ABRs, and distortion product otoacoustic emissions, DPOAEs) provide diagnostic specificity for differentially diagnosing overt hearing impairments, but they remain limited in their ability to detect specific sites of lesion and subtle levels of cochlear damage. Studies in animal models may hold the key to improve differential diagnosis due to the ability to induce tightly controlled and histologically verifiable subclinical cochlear pathologies. Here, we present a normative set of traditional and clinically novel physiological measures using ABRs and DPOAEs measured in a large cohort of male macaque monkeys. Given the high similarities between macaque and human auditory anatomy, physiology, and susceptibility to hearing damage, this normative data set will serve as a crucial baseline to investigate novel physiological measures to improve diagnostics. DPOAE amplitudes were robust at f2 = 1.22, L1/L2 = 65/55, increased with frequency up to 10 kHz, and exhibited high test re-test reliability. DPOAE thresholds were lowest from 2-10 kHz and highest < 2 kHz. ABRs with a standard clinical electrode montage (vertex-to-mastoid, VM) produced Waves I-IV with a less frequently observed Wave-I, and lower thresholds. ABRs with a vertex-to-tympanic membrane (VT) electrode montage produced a more robust Wave-I, but absent Waves II-IV and higher thresholds. Further study with the VM montage revealed amplitudes that increased with stimulus level and were largest in response to click stimuli, with Wave-II showing the largest ABR amplitude, followed by -IV and -I, with high inter- and intra-subject variability. ABR wave latencies decreased with stimulus level and frequency. When stimulus presentation rate increased or stimuli were presented in close temporal proximity, ABR amplitude decreased, and latency increased. These findings expand upon existing literature of normative clinical physiological data in nonhuman primates and lay the groundwork for future studies investigating the effects of noise-induced pathologies in macaques.
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Affiliation(s)
- Amy N Stahl
- Vanderbilt Neuroscience Graduate Program, Vanderbilt University, Nashville, TN 37212; Vanderbilt Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN 37212.
| | - Jane A Mondul
- Vanderbilt Neuroscience Graduate Program, Vanderbilt University, Nashville, TN 37212; Vanderbilt Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN 37212.
| | - Katy A Alek
- Vanderbilt Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN 37212.
| | - Troy A Hackett
- Vanderbilt Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN 37212.
| | - Ramnarayan Ramachandran
- Vanderbilt Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN 37212.
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12
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Filova I, Pysanenko K, Tavakoli M, Vochyanova S, Dvorakova M, Bohuslavova R, Smolik O, Fabriciova V, Hrabalova P, Benesova S, Valihrach L, Cerny J, Yamoah EN, Syka J, Fritzsch B, Pavlinkova G. ISL1 is necessary for auditory neuron development and contributes toward tonotopic organization. Proc Natl Acad Sci U S A 2022; 119:e2207433119. [PMID: 36074819 PMCID: PMC9478650 DOI: 10.1073/pnas.2207433119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 08/04/2022] [Indexed: 11/18/2022] Open
Abstract
A cardinal feature of the auditory pathway is frequency selectivity, represented in a tonotopic map from the cochlea to the cortex. The molecular determinants of the auditory frequency map are unknown. Here, we discovered that the transcription factor ISL1 regulates the molecular and cellular features of auditory neurons, including the formation of the spiral ganglion and peripheral and central processes that shape the tonotopic representation of the auditory map. We selectively knocked out Isl1 in auditory neurons using Neurod1Cre strategies. In the absence of Isl1, spiral ganglion neurons migrate into the central cochlea and beyond, and the cochlear wiring is profoundly reduced and disrupted. The central axons of Isl1 mutants lose their topographic projections and segregation at the cochlear nucleus. Transcriptome analysis of spiral ganglion neurons shows that Isl1 regulates neurogenesis, axonogenesis, migration, neurotransmission-related machinery, and synaptic communication patterns. We show that peripheral disorganization in the cochlea affects the physiological properties of hearing in the midbrain and auditory behavior. Surprisingly, auditory processing features are preserved despite the significant hearing impairment, revealing central auditory pathway resilience and plasticity in Isl1 mutant mice. Mutant mice have a reduced acoustic startle reflex, altered prepulse inhibition, and characteristics of compensatory neural hyperactivity centrally. Our findings show that ISL1 is one of the obligatory factors required to sculpt auditory structural and functional tonotopic maps. Still, upon Isl1 deletion, the ensuing central plasticity of the auditory pathway does not suffice to overcome developmentally induced peripheral dysfunction of the cochlea.
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Affiliation(s)
- Iva Filova
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology Czech Academy of Sciences, 25250 Vestec, Czechia
| | - Kateryna Pysanenko
- Department of Auditory Neuroscience, Institute of Experimental Medicine Czech Academy of Sciences, 14220 Prague, Czechia
| | - Mitra Tavakoli
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology Czech Academy of Sciences, 25250 Vestec, Czechia
| | - Simona Vochyanova
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology Czech Academy of Sciences, 25250 Vestec, Czechia
| | - Martina Dvorakova
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology Czech Academy of Sciences, 25250 Vestec, Czechia
| | - Romana Bohuslavova
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology Czech Academy of Sciences, 25250 Vestec, Czechia
| | - Ondrej Smolik
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology Czech Academy of Sciences, 25250 Vestec, Czechia
| | - Valeria Fabriciova
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology Czech Academy of Sciences, 25250 Vestec, Czechia
| | - Petra Hrabalova
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology Czech Academy of Sciences, 25250 Vestec, Czechia
| | - Sarka Benesova
- Laboratory of Gene Expression, Institute of Biotechnology Czech Academy of Sciences, 25250 Vestec, Czechia
| | - Lukas Valihrach
- Laboratory of Gene Expression, Institute of Biotechnology Czech Academy of Sciences, 25250 Vestec, Czechia
| | - Jiri Cerny
- Laboratory of Light Microscopy, Institute of Molecular Genetics Czech Academy of Sciences, 14220 Prague, Czechia
| | - Ebenezer N. Yamoah
- Department of Physiology, School of Medicine, University of Nevada, Reno, NV 89557
| | - Josef Syka
- Department of Auditory Neuroscience, Institute of Experimental Medicine Czech Academy of Sciences, 14220 Prague, Czechia
| | - Bernd Fritzsch
- Department of Biology, University of Iowa, Iowa City, IA 52242-1324
- Department of Otolaryngology, University of Iowa, Iowa City, IA 52242-1324
| | - Gabriela Pavlinkova
- Laboratory of Molecular Pathogenetics, Institute of Biotechnology Czech Academy of Sciences, 25250 Vestec, Czechia
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13
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Guo Y, Han L, Han S, Tang H, Wang S, Cui C, Chen B, Li H, Shu Y. Specific knockdown of Htra2 by CRISPR-CasRx prevents acquired sensorineural hearing loss in mice. MOLECULAR THERAPY. NUCLEIC ACIDS 2022; 28:643-655. [PMID: 35615000 PMCID: PMC9112053 DOI: 10.1016/j.omtn.2022.04.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 04/22/2022] [Indexed: 12/26/2022]
Abstract
CasRx, a recently discovered member of the type VI CRISPR system with minimum size, offers a new approach for RNA manipulation with high efficiency and specificity in prokaryotes and eukaryotes. However, in vivo studies of functional recovery using the CasRx system have not been well characterized. Here, we sought to establish an adeno-associated virus (AAV)-CasRx-guide RNA (gRNA) system for the specific knockdown of Htra2 transcript to protect mice from aminoglycosides-induced hearing loss. For the study, we verified an optimized gRNA in vitro, which was packaged into a single AAV with CasRx, and injected the packaged AAV into mice with hearing loss induced by neomycin and auditory functions investigated by auditory brainstem response tests. Upon using the AAV-CasRx-gRNA system, we found the knockdown of Htra2 transcript led to less cochlear hair cell loss and improved auditory function, with low off-target and adverse side effects. Additionally, the decrease in Htra2 significantly inhibits mRNA expression of Casp3 and Casp9. In conclusion, the AAV-CasRx-gRNA-mediated knockdown of Htra2 transcript in mice has been proved effective and safe for preventing hearing loss induced by aminoglycosides and, thus, represents a promising genetic approach for the future clinical applications for treating non-inherited hearing loss.
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Affiliation(s)
- Yang Guo
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai 200031, China.,Institute of Biomedical Science, Fudan University, Shanghai 200032, China.,NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200032, China
| | - Lei Han
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai 200031, China.,Institute of Biomedical Science, Fudan University, Shanghai 200032, China.,NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200032, China.,Department of Otorhinolaryngology, The Second Affiliated Hospital, University of South China, Hengyang 421001, China
| | - Shuang Han
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai 200031, China.,Institute of Biomedical Science, Fudan University, Shanghai 200032, China.,NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200032, China.,Department of Otolaryngology Head and Neck Surgery, The Second Hospital of Jilin University, Changchun 130041, China
| | - Honghai Tang
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai 200031, China.,Institute of Biomedical Science, Fudan University, Shanghai 200032, China.,NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200032, China
| | - Shengyi Wang
- Institute of Biomedical Science, Fudan University, Shanghai 200032, China
| | - Chong Cui
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai 200031, China.,Institute of Biomedical Science, Fudan University, Shanghai 200032, China.,NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200032, China
| | - Bing Chen
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai 200031, China.,Institute of Biomedical Science, Fudan University, Shanghai 200032, China.,NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200032, China
| | - Huawei Li
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai 200031, China.,Institute of Biomedical Science, Fudan University, Shanghai 200032, China.,NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200032, China.,The Institutes of Brain Science and the Collaborative Innovation Center for Brain Science, Fudan University, Shanghai 200032, China
| | - Yilai Shu
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai 200031, China.,Institute of Biomedical Science, Fudan University, Shanghai 200032, China.,NHC Key Laboratory of Hearing Medicine (Fudan University), Shanghai 200032, China
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14
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Sun L, Gao D, Chen J, Hou S, Li Y, Huang Y, Mammano F, Chen J, Yang J. Failure Of Hearing Acquisition in Mice With Reduced Expression of Connexin 26 Correlates With the Abnormal Phasing of Apoptosis Relative to Autophagy and Defective ATP-Dependent Ca2+ Signaling in Kölliker’s Organ. Front Cell Neurosci 2022; 16:816079. [PMID: 35308122 PMCID: PMC8928193 DOI: 10.3389/fncel.2022.816079] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 02/03/2022] [Indexed: 12/11/2022] Open
Abstract
Mutations in the GJB2 gene that encodes connexin 26 (Cx26) are the predominant cause of prelingual hereditary deafness, and the most frequently encountered variants cause complete loss of protein function. To investigate how Cx26 deficiency induces deafness, we examined the levels of apoptosis and autophagy in Gjb2loxP/loxP; ROSA26CreER mice injected with tamoxifen on the day of birth. After weaning, these mice exhibited severe hearing impairment and reduced Cx26 expression in the cochlear duct. Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) positive cells were observed in apical, middle, and basal turns of Kölliker’s organ at postnatal (P) day 1 (P1), associated with increased expression levels of cleaved caspase 3, but decreased levels of autophagy-related proteins LC3-II, P62, and Beclin1. In Kölliker’s organ cells with decreased Cx26 expression, we also found significantly reduced levels of intracellular ATP and hampered Ca2+ responses evoked by extracellular ATP application. These results offer novel insight into the mechanisms that prevent hearing acquisition in mouse models of non-syndromic hearing impairment due to Cx26 loss of function.
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Affiliation(s)
- Lianhua Sun
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Dekun Gao
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Junmin Chen
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Shule Hou
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Yue Li
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Yuyu Huang
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Fabio Mammano
- Department of Physics and Astronomy “G. Galilei”, University of Padua, Padua, Italy
- Department of Biomedical Sciences, Institute of Biochemistry and Cell Biology, Italian National Research Council, Monterotondo, Italy
- *Correspondence: Jun Yang Jianyong Chen Fabio Mammano
| | - Jianyong Chen
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
- *Correspondence: Jun Yang Jianyong Chen Fabio Mammano
| | - Jun Yang
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
- *Correspondence: Jun Yang Jianyong Chen Fabio Mammano
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15
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Deng T, Li J, Liu J, Xu F, Liu X, Mi J, Bergquist J, Wang H, Yang C, Lu L, Song X, Yao C, Tian G, Zheng QY. Hippocampal Transcriptome-Wide Association Study Reveals Correlations Between Impaired Glutamatergic Synapse Pathway and Age-Related Hearing Loss in BXD-Recombinant Inbred Mice. Front Neurosci 2021; 15:745668. [PMID: 34867157 PMCID: PMC8636065 DOI: 10.3389/fnins.2021.745668] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 09/22/2021] [Indexed: 11/18/2022] Open
Abstract
Age-related hearing loss (ARHL) is associated with cognitive dysfunction; however, the detailed underlying mechanisms remain unclear. The aim of this study is to investigate the potential underlying mechanism with a system genetics approach. A transcriptome-wide association study was performed on aged (12–32 months old) BXD mice strains. The hippocampus gene expression was obtained from 56 BXD strains, and the hearing acuity was assessed from 54 BXD strains. Further correlation analysis identified a total of 1,435 hearing-related genes in the hippocampus (p < 0.05). Pathway analysis of these genes indicated that the impaired glutamatergic synapse pathway is involved in ARHL (p = 0.0038). Further gene co-expression analysis showed that the expression level of glutamine synthetase (Gls), which is significantly correlated with ARHL (n = 26, r = −0.46, p = 0.0193), is a crucial regulator in glutamatergic synapse pathway and associated with learning and memory behavior. In this study, we present the first systematic evaluation of hippocampus gene expression pattern associated with ARHL, learning, and memory behavior. Our results provide novel potential molecular mechanisms involved in ARHL and cognitive dysfunction association.
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Affiliation(s)
- Tingzhi Deng
- Precision Medicine Research Center, School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Jingjing Li
- Precision Medicine Research Center, School of Pharmacy, Binzhou Medical University, Yantai, China.,Department of Otorhinolaryngology-Head and Neck Surgery, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China.,Second Clinical Medical College, Binzhou Medical University, Yantai, China
| | - Jian Liu
- Department of Plastic Surgery, Shandong Provincial Qianfoshan Hospital, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Fuyi Xu
- Precision Medicine Research Center, School of Pharmacy, Binzhou Medical University, Yantai, China.,Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Xiaoya Liu
- Precision Medicine Research Center, School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Jia Mi
- Precision Medicine Research Center, School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Jonas Bergquist
- Precision Medicine Research Center, School of Pharmacy, Binzhou Medical University, Yantai, China.,Department of Chemistry-BMC, Analytical Chemistry and Neurochemistry, Uppsala University, Uppsala, Sweden
| | - Helen Wang
- Department of Medical Biochemistry and Microbiology, BMC, Uppsala University, Uppsala, Sweden
| | - Chunhua Yang
- Precision Medicine Research Center, School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Lu Lu
- Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Xicheng Song
- Department of Otorhinolaryngology-Head and Neck Surgery, Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
| | - Cuifang Yao
- Precision Medicine Research Center, School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Geng Tian
- Precision Medicine Research Center, School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Qing Yin Zheng
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University, Cleveland, OH, United States
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16
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Peineau T, Belleudy S, Pietropaolo S, Bouleau Y, Dulon D. Synaptic Release Potentiation at Aging Auditory Ribbon Synapses. Front Aging Neurosci 2021; 13:756449. [PMID: 34733152 PMCID: PMC8558230 DOI: 10.3389/fnagi.2021.756449] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 09/21/2021] [Indexed: 11/13/2022] Open
Abstract
Age-related hidden hearing loss is often described as a cochlear synaptopathy that results from a progressive degeneration of the inner hair cell (IHC) ribbon synapses. The functional changes occurring at these synapses during aging are not fully understood. Here, we characterized this aging process in IHCs of C57BL/6J mice, a strain which is known to carry a cadherin-23 mutation and experiences early hearing loss with age. These mice, while displaying a large increase in auditory brainstem thresholds due to 50% loss of IHC synaptic ribbons at middle age (postnatal day 365), paradoxically showed enhanced acoustic startle reflex suggesting a hyperacusis-like response. The auditory defect was associated with a large shrinkage of the IHCs' cell body and a drastic enlargement of their remaining presynaptic ribbons which were facing enlarged postsynaptic AMPAR clusters. Presynaptic Ca2+ microdomains and the capacity of IHCs to sustain high rates of exocytosis were largely increased, while on the contrary the expression of the fast-repolarizing BK channels, known to negatively control transmitter release, was decreased. This age-related synaptic plasticity in IHCs suggested a functional potentiation of synaptic transmission at the surviving synapses, a process that could partially compensate the decrease in synapse number and underlie hyperacusis.
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Affiliation(s)
- Thibault Peineau
- Neurophysiologie de la Synapse Auditive, INSERM UMRS 1120, Bordeaux Neurocampus, Université de Bordeaux, Bordeaux, France.,Institut de l'Audition, Centre Institut Pasteur/Inserm, Paris, France
| | - Séverin Belleudy
- Neurophysiologie de la Synapse Auditive, INSERM UMRS 1120, Bordeaux Neurocampus, Université de Bordeaux, Bordeaux, France
| | | | - Yohan Bouleau
- Neurophysiologie de la Synapse Auditive, INSERM UMRS 1120, Bordeaux Neurocampus, Université de Bordeaux, Bordeaux, France.,Institut de l'Audition, Centre Institut Pasteur/Inserm, Paris, France
| | - Didier Dulon
- Neurophysiologie de la Synapse Auditive, INSERM UMRS 1120, Bordeaux Neurocampus, Université de Bordeaux, Bordeaux, France.,Institut de l'Audition, Centre Institut Pasteur/Inserm, Paris, France
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17
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Sorg K, Heimann L, Lana GM, Langenbucher A, Schick B, Arzt E, Wenzel GI. Optoacoustically induced auditory brainstem responses in the mouse model enhanced through an absorbing film. JOURNAL OF BIOMEDICAL OPTICS 2021; 26:JBO-210173R. [PMID: 34480448 PMCID: PMC8414560 DOI: 10.1117/1.jbo.26.9.098001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 08/17/2021] [Indexed: 06/13/2023]
Abstract
SIGNIFICANCE Optoacoustic stimulation offers an alternative stimulation strategy for the hearing organ. To serve as the base for a novel auditory prosthesis, the optoacoustic stimulation must be biocompatible and energy-saving. AIM Enhancing the efficiency of optoacoustic stimulation while reducing the energy input in a suited animal model. APPROACH Optoacoustically induced auditory brainstem responses (oABRs) were recorded after the pulsed laser irradiation of the tympanic membrane (TM) in mice. The results were compared with the ABRs induced through acoustic click stimulation. In addition, self-adhesive absorbing films were applied on the TM before the optoacoustic stimulation to investigate their effect on the resulting ABRs. RESULTS Using an absorbing film on the TM during optical stimulation led to considerably enhanced oABR wave I amplitude values compared with the stimulation of the bare TM. When using our stimulation strategy, we induced oABR waves in the 50% to 60% range of the acoustical stimulation reached with 80-dB SPL click stimuli. CONCLUSIONS The mouse model can be used for certain developmental work for an optoacoustic auditory prosthesis. Using absorbing films on the TM during optical stimulation considerably enhances oABR wave I amplitude. Optimization of the stimulation strategy could further enhance the efficiency within biocompatibility margins.
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Affiliation(s)
- Katharina Sorg
- Saarland University Medical Center, Department of Otorhinolaryngology, Homburg, Germany
| | - Larissa Heimann
- Saarland University Medical Center, Department of Otorhinolaryngology, Homburg, Germany
| | - Gabriela Moreira Lana
- INM Leibniz Institute for New Materials, Saarbrücken, Germany
- Saarland University, Department of Materials Science and Engineering, Saarbrücken, Germany
| | - Achim Langenbucher
- Saarland University, Department of Experimental Ophthalmology, Homburg, Germany
| | - Bernhard Schick
- Saarland University Medical Center, Department of Otorhinolaryngology, Homburg, Germany
| | - Eduard Arzt
- INM Leibniz Institute for New Materials, Saarbrücken, Germany
- Saarland University, Department of Materials Science and Engineering, Saarbrücken, Germany
| | - Gentiana Ioana Wenzel
- Saarland University Medical Center, Department of Otorhinolaryngology, Homburg, Germany
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18
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Ahn Y, Choi JS, Kim DH, Batsaikhan T, Seo YJ. A validation study of auditory function in an aminoglycoside-furosemide ototoxicity mouse model: Auditory brainstem response and distortion product otoacoustic emissions. TOXICOLOGY RESEARCH AND APPLICATION 2021. [DOI: 10.1177/23978473211016816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Sensorineural hearing loss due to ototoxic drugs remains as a conflict as the treatment option with aminoglycosides. Ototoxic mouse model was produced with the administration of ototoxic drugs aminoglycoside kanamycin and loop-diuretic furosemide, thus validation of auditory function of the mouse model is needed to determine the efficacy of the drugs. Kanamycin sulfate 550 mg/kg (VWR life sciences, PA, USA) and furosemide 130 mg/kg (Lasix, Handok, Korea) were administered through subcutaneous and intraperitoneal injection respectively. Auditory brainstem response and distortion otoacoustic emission tests were performed on days 3,5,7,10,14 post administration of the ototoxic drug. Thresholds in response to the stimulus given in the auditory brainstem recordings and distortion otoacoustic emission tests were obtained. The hearing threshold shift to high stimulus intensity was observed post administration of the ototoxic drug. Latency of the ABR peak waves were recorded and analyzed, latency delay was observed as hearing threshold increases. These findings will further support in the application of this animal model in various studies regarding ototoxic hearing loss.
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Affiliation(s)
- Yeji Ahn
- Research Institute of Hearing Enhancement, Wonju College of Medicine, Yonsei University, Wonju, South Korea
- Department of Otorhinolaryngology, Wonju College of Medicine, Yonsei University, Wonju, South Korea
| | - Jin Sil Choi
- Research Institute of Hearing Enhancement, Wonju College of Medicine, Yonsei University, Wonju, South Korea
- Department of Otorhinolaryngology, Wonju College of Medicine, Yonsei University, Wonju, South Korea
| | - Dae Hyun Kim
- Department of Medicine, Wonju College of Medicine, Yonsei University, Wonju, South Korea
| | - Temuulen Batsaikhan
- Research Institute of Hearing Enhancement, Wonju College of Medicine, Yonsei University, Wonju, South Korea
- Department of Otorhinolaryngology, Wonju College of Medicine, Yonsei University, Wonju, South Korea
| | - Young Joon Seo
- Research Institute of Hearing Enhancement, Wonju College of Medicine, Yonsei University, Wonju, South Korea
- Department of Otorhinolaryngology, Wonju College of Medicine, Yonsei University, Wonju, South Korea
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19
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Overexpression of Isl1 under the Pax2 Promoter, Leads to Impaired Sound Processing and Increased Inhibition in the Inferior Colliculus. Int J Mol Sci 2021; 22:ijms22094507. [PMID: 33925933 PMCID: PMC8123449 DOI: 10.3390/ijms22094507] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 11/28/2022] Open
Abstract
The LIM homeodomain transcription factor ISL1 is essential for the different aspects of neuronal development and maintenance. In order to study the role of ISL1 in the auditory system, we generated a transgenic mouse (Tg) expressing Isl1 under the Pax2 promoter control. We previously reported a progressive age-related decline in hearing and abnormalities in the inner ear, medial olivocochlear system, and auditory midbrain of these Tg mice. In this study, we investigated how Isl1 overexpression affects sound processing by the neurons of the inferior colliculus (IC). We recorded extracellular neuronal activity and analyzed the responses of IC neurons to broadband noise, clicks, pure tones, two-tone stimulation and frequency-modulated sounds. We found that Tg animals showed a higher inhibition as displayed by two-tone stimulation; they exhibited a wider dynamic range, lower spontaneous firing rate, longer first spike latency and, in the processing of frequency modulated sounds, showed a prevalence of high-frequency inhibition. Functional changes were accompanied by a decreased number of calretinin and parvalbumin positive neurons, and an increased expression of vesicular GABA/glycine transporter and calbindin in the IC of Tg mice, compared to wild type animals. The results further characterize abnormal sound processing in the IC of Tg mice and demonstrate that major changes occur on the side of inhibition.
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20
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Verdoodt D, Eens S, Van Dam D, De Deyn PP, Vanderveken OM, Szewczyk K, Saldien V, Ponsaerts P, Van Rompaey V. Effect of Oral Allylnitrile Administration on Cochlear Functioning in Mice Following Comparison of Different Anesthetics for Hearing Assessment. FRONTIERS IN TOXICOLOGY 2021; 3:641569. [PMID: 35295154 PMCID: PMC8915850 DOI: 10.3389/ftox.2021.641569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 02/03/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Allylnitrile is a compound found in cruciferous vegetables and has the same lethality and toxic effects as the other nitriles. In 2013, a viable allylnitrile ototoxicity mouse model was established. The toxicity of allylnitrile was limited through inhibition of CYP2E1 with trans-1,2-dichloroethylene (TDCE). The allylnitrile intoxication model has been extensively tested in the 129S1 mouse strain for vestibular function, which showed significant HC loss in the vestibular organ accompanied by severe behavioral abnormalities. However, the effect of allylnitrile on auditory function remains to be evaluated. Commonly used anesthetics to conduct hearing measurements are isoflurane and ketamine/xylazine anesthesia but the effect of these anesthetics on hearing assessment is still unknown. In this study we will evaluate the otovestibular effects of oral allylnitrile administration in mice. In addition, we will compare the influence of isoflurane and ketamine/xylazine anesthesia on hearing thresholds.Methods and Materials: Fourteen Coch+/– CBACa mice were randomly allocated into an allylnitrile (n = 8) and a control group (n = 6). Baseline measurements were done with isoflurane and 1 week later under ketamine/xylazine anesthesia. After baseline audiovestibular measurements, mice were co-administered with a single dose of allylnitrile and, to reduce systemic toxicity, three intraperitoneal injections of TDCE were given. Hearing loss was evaluated by recordings of auditory brainstem responses (ABR) and distortion product otoacoustic emissions (DPOAE). Specific behavioral test batteries for vestibular function were used to assess alterations in vestibular function.Results: Hearing thresholds were significantly elevated when using isoflurane anesthesia compared to ketamine/xylazine anesthesia for all frequencies of the ABR and the mid-to-high frequencies in DPOAE. Allylnitrile-treated mice lacked detectable ABR thresholds at each frequency tested, while DPOAE thresholds were significantly elevated in the low-frequency region of the cochlea and completely lacking in the mid-to high frequency region. Vestibular function was not affected by allylnitrile administration.Conclusion: Isoflurane anesthesia has a negative confounding effect on the measurement of hearing thresholds in mice. A single oral dose of allylnitrile induced hearing loss but did not significantly alter vestibular function in mice. This is the first study to show that administration of allylnitrile can cause a complete loss of hearing function in mice.
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Affiliation(s)
- Dorien Verdoodt
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Laboratory of Experimental Hematology, Faculty of Medicine and Health Sciences, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, Antwerp, Belgium
- *Correspondence: Dorien Verdoodt
| | - Sander Eens
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Debby Van Dam
- Laboratory of Neurochemistry and Behaviour, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
- Department of Neurology and Alzheimer Research Center, University of Groningen and University Medical Center Groningen, Groningen, Netherlands
| | - Peter Paul De Deyn
- Laboratory of Neurochemistry and Behaviour, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
- Department of Neurology and Alzheimer Research Center, University of Groningen and University Medical Center Groningen, Groningen, Netherlands
- Department of Neurology, Memory Clinic of Hospital Network Antwerp (ZNA) Middelheim and Hoge Beuken, Antwerp, Belgium
| | - Olivier M. Vanderveken
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Department of Otorhinolaryngology and Head and Neck Surgery, Antwerp University Hospital, Edegem, Belgium
| | - Krystyna Szewczyk
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Vera Saldien
- Department of Anaesthesiology, Antwerp University Hospital, Edegem, Belgium
| | - Peter Ponsaerts
- Laboratory of Experimental Hematology, Faculty of Medicine and Health Sciences, Vaccine and Infectious Disease Institute (Vaxinfectio), University of Antwerp, Antwerp, Belgium
| | - Vincent Van Rompaey
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Department of Otorhinolaryngology and Head and Neck Surgery, Antwerp University Hospital, Edegem, Belgium
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21
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Long term changes to auditory sensitivity following blast trauma in mice. Hear Res 2021; 403:108201. [PMID: 33636682 DOI: 10.1016/j.heares.2021.108201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 01/21/2021] [Accepted: 02/06/2021] [Indexed: 11/21/2022]
Abstract
Blast trauma is a common acoustic/physical insult occurring in modern warfare. Twenty percent of active duty military come into close proximity to explosions and experience mild to severe sensory deficits. The prevalence of such injuries is high but correlating auditory sensitivity changes with the initial insult is difficult because injury and evaluations are often separated by long time periods. Here, auditory sensitivity was measured before and after a traumatic blast in adult CBA/CaJ mice using auditory brainstem responses, distortion production otoacoustic emissions, and behavioral detection of pure tones. These measurements included baseline auditory sensitivity prior to injury in all mice, and again at 3, 30, and 90 days after the blast in the two physiological groups, and daily for up to 90 days in the behavioral group. Mice in all groups experienced an initial deterioration in auditory sensitivity, though physiological measurements showed evidence of recovery that behavioral measurements did not. Amplitudes and latencies of ABR waves may reflect additional changes beyond the peripheral damage shown by the threshold changes and should be explored further. The present work addresses a major gap in the current acoustic trauma literature both in terms of comparing physiological and behavioral methods, as well as measuring the time course of recovery.
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22
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Sex-Specific Role for Dopamine Receptor D2 in Dorsal Raphe Serotonergic Neuron Modulation of Defensive Acoustic Startle and Dominance Behavior. eNeuro 2020; 7:ENEURO.0202-20.2020. [PMID: 33214315 PMCID: PMC7768286 DOI: 10.1523/eneuro.0202-20.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 10/19/2020] [Accepted: 11/09/2020] [Indexed: 11/27/2022] Open
Abstract
Brain networks underlying states of social and sensory alertness are normally adaptive, influenced by serotonin and dopamine (DA), and abnormal in neuropsychiatric disorders, often with sex-specific manifestations. Underlying circuits, cells, and molecules are just beginning to be delineated. Implicated is a subtype of serotonergic neuron denoted Drd2-Pet1, distinguished by expression of the type-2 DA receptor (Drd2) gene, inhibited cell-autonomously by DRD2 agonism in slice, and, when constitutively silenced in male mice, affects levels of defensive and exploratory behaviors (Niederkofler et al., 2016). Unknown has been whether DRD2 signaling in these Pet1 neurons contributes to their capacity for shaping defensive behaviors. To address this, we generated mice in which Drd2 gene sequences were deleted selectively in Pet1 neurons. We found that Drd2Pet1-CKO males, but not females, demonstrated increased winning against sex-matched controls in a social dominance assay. Drd2Pet1-CKO females, but not males, exhibited blunting of the acoustic startle response, a protective, defensive reflex. Indistinguishable from controls were auditory brainstem responses (ABRs), locomotion, cognition, and anxiety-like and depression-like behaviors. Analyzing wild-type Drd2-Pet1 neurons, we found sex-specific differences in the proportional distribution of axonal collaterals, in action potential (AP) duration, and in transcript levels of Gad2, important for GABA synthesis. Drd2Pet1-CKO cells displayed sex-specific differences in the percentage of cells harboring Gad2 transcripts. Our results suggest that DRD2 function in Drd2-Pet1 neurons is required for normal defensive/protective behaviors in a sex-specific manner, which may be influenced by the identified sex-specific molecular and cellular features. Related behaviors in humans too show sex differences, suggesting translational relevance.
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23
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Kim MJ, Han C, White K, Park HJ, Ding D, Boyd K, Rothenberger C, Bose U, Carmichael P, Linser PJ, Tanokura M, Salvi R, Someya S. Txn2 haplodeficiency does not affect cochlear antioxidant defenses or accelerate the progression of cochlear cell loss or hearing loss across the lifespan. Exp Gerontol 2020; 141:111078. [PMID: 32866605 DOI: 10.1016/j.exger.2020.111078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 07/16/2020] [Accepted: 08/25/2020] [Indexed: 11/16/2022]
Abstract
Thioredoxin 2 (TXN2) is a small redox protein found in nearly all organisms. As a mitochondrial member of the thioredoxin antioxidant defense system, TXN2 interacts with peroxiredoxin 3 (PRDX3) to remove hydrogen peroxide. Accordingly, TXN2 is thought to play an important role in maintaining the appropriate mitochondrial redox environment and protecting the mitochondrial components against oxidative stress. In the current study, we investigated the effects of Txn2 haplodeficiency on cochlear antioxidant defenses, auditory function, and cochlear cell loss across the lifespan in wild-type (WT) and Txn2 heterozygous knockout (Txn2+/-) mice backcrossed onto CBA/CaJ mice, a well-established model of age-related hearing loss. Txn2+/- mice displayed a 58% decrease in TXN2 protein levels in the mitochondria of the inner ears compared to WT mice. However, Txn2 haplodeficiency did not affect the thioredoxin or glutathione antioxidant defense in both the mitochondria and cytosol of the inner ears of young mice. There were no differences in the levels of mitochondrial biogenesis markers, mitochondrial DNA content, or oxidative DNA and protein damage markers in the inner ears between young WT and Txn2+/- mice. In a mouse inner ear cell line, knockdown of Txn2 did not affect cell viability under hydrogen peroxide treatment. Consistent with the tissue and cell line results, there were no differences in hair cell loss or spiral ganglion neuron density between WT and Txn2+/- mice at 3-5 or 23-25 months of age. Furthermore, Txn2 haplodeficiency did not affect auditory brainstem response threshold, wave I latency, or wave I amplitude at 3-5, 15-16, or 23-25 months of age. Therefore, Txn2 haplodeficiency does not affect cochlear antioxidant defenses, accelerate degeneration of cochlear cells, or affect auditory function in mice across the lifespan.
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Affiliation(s)
- Mi-Jung Kim
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Chul Han
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Karessa White
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Hyo-Jin Park
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Dalian Ding
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, USA
| | - Kevin Boyd
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | | | - Upal Bose
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Peter Carmichael
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Paul J Linser
- Whitney Laboratory, University of Florida, St Augustine, FL, USA
| | - Masaru Tanokura
- Department of Applied Biological Chemistry, University of Tokyo, Yayoi, Tokyo, Japan
| | - Richard Salvi
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, USA
| | - Shinichi Someya
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA.
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24
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Old JM, Parsons C, Tulk ML. Hearing thresholds of small native Australian mammals – red-tailed phascogale (Phascogale calura), kultarr (Antechinomys laniger) and spinifex hopping-mouse (Notomys alexis). Zool J Linn Soc 2020. [DOI: 10.1093/zoolinnean/zlaa003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Hearing is essential for communication, to locate prey and to avoid predators. We addressed the paucity of information regarding hearing in Australian native mammals by specifically assessing the hearing range and sensitivity of the red-tailed phascogale (Phascogale calura), the kultarr (Antechinomys laniger) and the spinifex hopping-mouse (Notomys alexis). Auditory brainstem response (ABR) audiograms were used to estimate hearing thresholds within the range of 1–84 kHz, over a dynamic range of 0–80 dB sound pressure level (SPL). Phascogales had a hearing range of 1–40 kHz, kultarrs 1–35 kHz and hopping-mice 1–35 kHz, with a dynamic range of 17–59 dB SPL, 20–80 dB SPL and 30–73 dB SPL, respectively. Hearing for all species was most sensitive at 8 kHz. Age showed no influence on optimal hearing, but younger animals had more diverse optimal hearing frequencies. There was a relationship between males and their optimal hearing frequency, and greater interaural distances of individual males may be related to optimal hearing frequency. Because nocturnal animals use high-range hearing for prey or predator detection, our study suggests this may also be the case for the species examined in this study. Future studies should investigate their vocalizations and behaviour in their natural environments, and by exposing them to different auditory stimuli.
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Affiliation(s)
- Julie M Old
- School of Science, Hawkesbury, Western Sydney University, Penrith, NSW, Australia
| | - Carl Parsons
- School of Medicine, Campbelltown, Western Sydney University, Penrith, NSW, Australia
| | - Melissa L Tulk
- School of Science, Hawkesbury, Western Sydney University, Penrith, NSW, Australia
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25
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Tam WY, Cheung KK. Phenotypic characteristics of commonly used inbred mouse strains. J Mol Med (Berl) 2020; 98:1215-1234. [PMID: 32712726 DOI: 10.1007/s00109-020-01953-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 12/16/2022]
Abstract
The laboratory mouse is the most commonly used mammalian model for biomedical research. An enormous number of mouse models, such as gene knockout, knockin, and overexpression transgenic mice, have been created over the years. A common practice to maintain a genetically modified mouse line is backcrossing with standard inbred mice over several generations. However, the choice of inbred mouse for backcrossing is critical to phenotypic characterization because phenotypic variabilities are often observed between mice with different genetic backgrounds. In this review, the major features of commonly used inbred mouse lines are discussed. The aim is to provide information for appropriate selection of inbred mouse lines for genetic and behavioral studies.
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Affiliation(s)
- Wing Yip Tam
- University Research Facility in Behavioral and Systems Neuroscience, The Hong Kong Polytechnic University, Hong Kong, SAR, China
| | - Kwok-Kuen Cheung
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, SAR, China.
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26
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Carrasco A, Tamura A, Pommer S, Chouinard JA, Kurima K, Barzaghi P, Wickens JR. Multiparametric assessment of the impact of opsin expression and anesthesia on striatal cholinergic neurons and auditory brainstem activity. J Comp Neurol 2020; 528:787-804. [PMID: 31625606 DOI: 10.1002/cne.24795] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 10/02/2019] [Accepted: 10/06/2019] [Indexed: 11/08/2022]
Abstract
Recent developments in genetic engineering have established murine models that permit the selective control of cholinergic neurons via optical stimulation. Despite copious benefits granted by these experimental advances, the sensory physiognomy of these organisms has remained poorly understood. Therefore, the present study evaluates sensory and neuronal response properties of animal models developed for the study of optically induced acetylcholine release regulation. Auditory brainstem responses, fluorescence imaging, and patch clamp recording techniques were used to assess the impact of viral infection, sex, age, and anesthetic agents across the ascending auditory pathway of ChAT-Cre and ChAT-ChR2(Ai32) mice. Data analyses revealed that neither genetic configuration nor adeno-associated viral infection alters the early stages of auditory processing or the cellular response properties of cholinergic neurons. However, anesthetic agent and dosage amount profoundly modulate the response properties of brainstem neurons. Last, analyses of age-related hearing loss in virally infected ChAT-Cre mice did not differ from those reported in wild type animals. This investigation demonstrates that ChAT-Cre and ChAT-ChR2(Ai32) mice are viable models for the study of cholinergic modulation in auditory processing, and it emphasizes the need for prudence in the selection of anesthetic procedures.
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Affiliation(s)
- Andres Carrasco
- Neurobiology Research Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Atsushi Tamura
- Neurobiology Research Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Stefan Pommer
- Neurobiology Research Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Julie A Chouinard
- Neurobiology Research Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Kiyoto Kurima
- Neurobiology Research Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Paolo Barzaghi
- Imaging Section, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Jeffery R Wickens
- Neurobiology Research Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
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27
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Park HJ, Kim MJ, Han C, White K, Ding D, Boyd K, Salvi R, Someya S. Effects of Gsta4 deficiency on age-related cochlear pathology and hearing loss in mice. Exp Gerontol 2020; 133:110872. [PMID: 32044382 DOI: 10.1016/j.exger.2020.110872] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 01/31/2020] [Accepted: 02/05/2020] [Indexed: 12/29/2022]
Abstract
The glutathione transferase (GST) detoxification system converts exogenous and endogenous toxins into a less toxic form by conjugating the toxic compound to reduced glutathione (GSH) by a variety of GST enzymes. Of the ~20 GST isoforms, GSTA4 exhibits high catalytic efficiency toward 4-hydroxynonenal (4-HNE), one of the most abundant end products of lipid peroxidation that contributes to neurodegenerative diseases and age-related disorders. Conjugation to GSH by GSTA4 is thought to be a major route of 4-HNE elimination. In the current study, we investigated the effects of Gsta4 deficiency on age-related cochlear pathology and hearing loss using young (3-5 months old) and old (24-25 months old) Gsta4+/+ and Gsta4-/- mice that were backcrossed onto the CBA/CaJ mouse strain, a well-established model of age-related hearing loss (AHL). At 3-5 months of age, loss of Gsta4 resulted in decreased total GSTA activity toward 4-HNE in the inner ears of young mice. However, there were no differences in the levels of 4-HNE in the inner ears between Gsta4+/+ and Gsta4-/- mice at 3-5 or 24-25 months of age. No histological abnormalities were observed in the cochlea and no hearing impairments were observed in young Gsta4-/- mice. At 24-25 months of age, both Gsta4+/+ and Gsta4-/- mice showed elevated ABR thresholds compared to 3-month-old mice, but there were no differences in ABR thresholds, cochlear spiral ganglion neuron densities, or stria vascularis thickness between Gsta4+/+ and Gsta4-/- mice. Together, these results suggest that under normal physiological conditions or during normal aging, GSTA4 is not essential for removal of 4-HNE in mouse inner ears.
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Affiliation(s)
- Hyo-Jin Park
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL 32611, USA
| | - Mi-Jung Kim
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL 32611, USA
| | - Chul Han
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL 32611, USA
| | - Karessa White
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL 32611, USA
| | - Dalian Ding
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, USA
| | - Kevin Boyd
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL 32611, USA
| | - Richard Salvi
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, USA
| | - Shinichi Someya
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL 32611, USA.
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28
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Paired measurements of cochlear function and hair cell count in Dutch-belted rabbits with noise-induced hearing loss. Hear Res 2019; 385:107845. [PMID: 31760262 DOI: 10.1016/j.heares.2019.107845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 10/18/2019] [Accepted: 11/10/2019] [Indexed: 11/22/2022]
Abstract
The effects of noise-induced hearing loss have yet to be studied for the Dutch-belted strain of rabbits, which is the only strain that has been used in studies of the central auditory system. We measured auditory brainstem responses (ABRs), 2f1-f2 distortion product otoacoustic emissions (DPOAEs), and counts of cochlear inner and outer hair cells (IHCs and OHCs, respectively) from confocal images of Myo7a-stained cochlear whole-mounts in unexposed and noise-overexposed, Dutch-belted, male and female rabbits in order to characterize cochlear function and structure under normal-hearing and hearing-loss conditions. Using an octave-band noise exposure centered at 750 Hz presented under isoflurane anesthesia, we found that a sound level of 133 dB SPL for 60 min was minimally sufficient to produce permanent ABR threshold shifts. Overexposure durations of 60 and 90 min caused median click-evoked ABR threshold shifts of 10 and 50 dB, respectively. Susceptibility to overexposure was highly variable across ears, but less variable across test frequencies within the same ear. ABR and DPOAE threshold shifts were smaller, on average, and more variable in male than female ears. Similarly, post-exposure survival of OHCs was higher, on average, and more variable in male than female ears. We paired post-exposure ABR and DPOAE threshold shift data with hair cell count data measured in the same ear at the same frequency and cochlear frequency location. ABR and DPOAE threshold shifts exhibited critical values of 46 and 18 dB, respectively, below which the majority of OHCs and IHCs survived and above which OHCs were wiped out while IHC survival was variable. Our data may be of use to researchers who wish to use Dutch-belted rabbits as a model for the effects of noise-induced hearing loss on the central auditory system.
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29
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Park HJ, Kim MJ, Rothenberger C, Kumar A, Sampson EM, Ding D, Han C, White K, Boyd K, Manohar S, Kim YH, Ticsa MS, Gomez AS, Caicedo I, Bose U, Linser PJ, Miyakawa T, Tanokura M, Foster TC, Salvi R, Someya S. GSTA4 mediates reduction of cisplatin ototoxicity in female mice. Nat Commun 2019; 10:4150. [PMID: 31515474 PMCID: PMC6742643 DOI: 10.1038/s41467-019-12073-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 08/20/2019] [Indexed: 12/21/2022] Open
Abstract
Cisplatin is one of the most widely used chemotherapeutic drugs for the treatment of cancer. Unfortunately, one of its major side effects is permanent hearing loss. Here, we show that glutathione transferase α4 (GSTA4), a member of the Phase II detoxifying enzyme superfamily, mediates reduction of cisplatin ototoxicity by removing 4-hydroxynonenal (4-HNE) in the inner ears of female mice. Under cisplatin treatment, loss of Gsta4 results in more profound hearing loss in female mice compared to male mice. Cisplatin stimulates GSTA4 activity in the inner ear of female wild-type, but not male wild-type mice. In female Gsta4−/− mice, cisplatin treatment results in increased levels of 4-HNE in cochlear neurons compared to male Gsta4−/− mice. In CBA/CaJ mice, ovariectomy decreases mRNA expression of Gsta4, and the levels of GSTA4 protein in the inner ears. Thus, our findings suggest that GSTA4-dependent detoxification may play a role in estrogen-mediated neuroprotection. A common complication of cisplatin-based chemotherapy is hearing loss. Here, Park et al. show that glutathione transferase α4 (GSTA4) contributes to reducing cisplatin toxicity in the inner ear of female mice by removing 4-hydroxynonenal (4-HNE).
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Affiliation(s)
- Hyo-Jin Park
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, 32611, USA
| | - Mi-Jung Kim
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, 32611, USA
| | - Christina Rothenberger
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, 32611, USA
| | - Ashok Kumar
- Department of Neuroscience, University of Florida, Gainesville, FL, 32611, USA
| | - Edith M Sampson
- Monoclonal Antibody Core, Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL, 32610, USA
| | - Dalian Ding
- Center for Hearing and Deafness, State University of New York at Buffalo, Buffalo, NY, 14214, USA
| | - Chul Han
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, 32611, USA
| | - Karessa White
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, 32611, USA
| | - Kevin Boyd
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, 32611, USA
| | - Senthilvelan Manohar
- Center for Hearing and Deafness, State University of New York at Buffalo, Buffalo, NY, 14214, USA
| | - Yong-Hwan Kim
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ, 85013, USA
| | - Maria S Ticsa
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, 32611, USA
| | - Aaron S Gomez
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, 32611, USA
| | - Isabela Caicedo
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, 32611, USA
| | - Upal Bose
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, 32611, USA
| | - Paul J Linser
- Whitney Laboratory, University of Florida, St. Augustine, FL, 32080, USA
| | - Takuya Miyakawa
- Department of Applied Biological Chemistry, University of Tokyo, Yayoi, Tokyo, 113-8657, Japan
| | - Masaru Tanokura
- Department of Applied Biological Chemistry, University of Tokyo, Yayoi, Tokyo, 113-8657, Japan
| | - Thomas C Foster
- Department of Neuroscience, University of Florida, Gainesville, FL, 32611, USA
| | - Richard Salvi
- Center for Hearing and Deafness, State University of New York at Buffalo, Buffalo, NY, 14214, USA.,Department of Audiology and Speech-Language Pathology, Asia University, Taichung, Taiwan, 41354, Republic of China
| | - Shinichi Someya
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, 32611, USA.
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Increased burden of mitochondrial DNA deletions and point mutations in early-onset age-related hearing loss in mitochondrial mutator mice. Exp Gerontol 2019; 125:110675. [PMID: 31344454 DOI: 10.1016/j.exger.2019.110675] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 07/14/2019] [Accepted: 07/20/2019] [Indexed: 11/20/2022]
Abstract
Mitochondrial DNA (mtDNA) mutations are thought to have a causal role in a variety of age-related neurodegenerative diseases, including age-related hearing loss (AHL). In the current study, we investigated the roles of mtDNA deletions and point mutations in AHL in mitochondrial mutator mice (Polgmut/mut) that were backcrossed onto CBA/CaJ mice, a well-established model of late-onset AHL. mtDNA deletions accumulated significantly with age in the inner ears of Polgmut/mut mice, while there were no differences in mtDNA deletion frequencies in the inner ears between 5 and 17 months old Polg+/+ mice or 5 months old Polg+/+ and Polgmut/mut mice. mtDNA deletions also accumulated significantly in the inner ears of CBA/CaJ mice during normal aging. In contrast, 5 months old Polgmut/mut mice displayed a 238-fold increase in mtDNA point mutation frequencies in the inner ears compared to age-matched Polg+/+ mice, but there were no differences in mtDNA point mutation frequencies in the inner ears between 5 and 17 months old Polgmut/mut mice. Seventeen-month-old Polgmut/mut mice also displayed early-onset severe hearing loss associated with a significant reduction in neural output of the cochlea, while age-matched Polg+/+ mice displayed little or no hearing impairment. Consistent with the physiological and mtDNA deletion test result, 17-month-old Polgmut/mut mice displayed a profound loss of spiral ganglion neurons in the cochlea. Thus, our data suggest that a higher burden of mtDNA point mutations from a young age and age-related accumulation of mtDNA deletions likely contribute to early-onset AHL in mitochondrial mutator mice.
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A broad filter between call frequency and peripheral auditory sensitivity in northern grasshopper mice (Onychomys leucogaster). J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2019; 205:481-489. [DOI: 10.1007/s00359-019-01338-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 03/18/2019] [Accepted: 04/11/2019] [Indexed: 12/19/2022]
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Qu T, Qi Y, Yu S, Du Z, Wei W, Cai A, Wang J, Nie B, Liu K, Gong S. Dynamic Changes of Functional Neuronal Activities Between the Auditory Pathway and Limbic Systems Contribute to Noise-Induced Tinnitus with a Normal Audiogram. Neuroscience 2019; 408:31-45. [PMID: 30946875 DOI: 10.1016/j.neuroscience.2019.03.054] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Revised: 03/25/2019] [Accepted: 03/26/2019] [Indexed: 12/20/2022]
Abstract
Tinnitus is thought to be triggered by aberrant neural activity in the central auditory pathway and is often accompanied by comorbidities of emotional distress and anxiety, which imply maladaptive functional connectivity to limbic structures, such as the amygdala and hippocampus. Tinnitus patients with normal audiograms can also have accompanying anxiety and depression, clinically. To test the role of functional connectivity between the central auditory pathway and limbic structures in patients with tinnitus with normal audiograms, we developed a murine noise-induced tinnitus model with a temporary threshold shift (TTS). Tinnitus mice exhibited reduced auditory brainstem response wave I amplitude, and an enhanced wave IV amplitude and wave IV/I amplitude ratio, as compared with control and non-tinnitus mice. Resting-state functional magnetic resonance imaging (fMRI) was used to identify abnormal connectivity of the amygdala and hippocampus and to determine the relationship with tinnitus characteristics. We found increased fMRI responses with amplitude of low-frequency fluctuation (ALFF) in the auditory cortex and decreased ALFF in the amygdala and hippocampus at day 1, but decreased ALFF in the auditory cortex and increased ALFF in the amygdala at day 28 post-noise exposure in tinnitus mice. Decreased functional connectivity between auditory brain regions and limbic structures was demonstrated at day 28 in tinnitus mice. Therefore, aberrant neural activities in tinnitus mice with TTS involved not only the central auditory pathway, but also limbic structures, and there was maladaptive functional connectivity between the central auditory pathway and limbic structures, such as the amygdala and hippocampus.
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Affiliation(s)
- Tengfei Qu
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Yue Qi
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Shukui Yu
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Zhengde Du
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Wei Wei
- Department of Otology, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Aoling Cai
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Center for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, PR China; Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Center for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, PR China
| | - Jie Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Center for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, PR China; Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Center for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, PR China
| | - Binbin Nie
- Beijing Engineering Research Center of Radiographic Techniques and Equipment, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ke Liu
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
| | - Shusheng Gong
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
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Wood NJ, Lowe AS, Walton JP. Sodium salicylate alters temporal integration measured through increasing stimulus presentation rates. Int J Audiol 2019; 58:141-150. [PMID: 30845859 DOI: 10.1080/14992027.2018.1544424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVE High doses of sodium salicylate (SS) are known to induce tinnitus, general hyperexcitability in the central auditory system, and to cause mild hearing loss. We used the auditory brainstem response (ABR) to assess the effects of SS on auditory sensitivity and temporal processing in the auditory nerve and brainstem. ABRs were evoked using tone burst stimuli varying in frequency and intensity with presentation rates from 11/s to 81/s. DESIGN ABRs were recorded and analysed prior to and after SS treatment in each animal, and peak 1 and peak 4 amplitudes and latencies were determined along with minimal response threshold. STUDY SAMPLE Nine young adult CBA/CaJ mice were used in a longitudinal within-subject design. RESULTS No measurable effects of presentation rate were found on ABR threshold prior to SS; however, following SS administration increasing stimulus rates lowered ABR thresholds by as much as 10 dB and compressed the peak amplitude by intensity level functions. CONCLUSIONS These results suggest that SS alters temporal integration and compressive nonlinearity, and that varying the stimulus rate of the ABR may prove to be a useful diagnostic tool in the study of hearing disorders that involve hyperexcitability.
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Affiliation(s)
- Nicole J Wood
- a Department of Biology , University of South Florida , Tampa , FL , USA.,b Morsani College of Medicine , University of South Florida , Tampa , FL , USA.,c Global Center for Hearing and Speech Research , University of South Florida , Tampa , FL , USA
| | - Andrea S Lowe
- c Global Center for Hearing and Speech Research , University of South Florida , Tampa , FL , USA.,d Department of Chemical and Biomedical Engineering , University of South Florida , Tampa , FL , USA
| | - Joseph P Walton
- c Global Center for Hearing and Speech Research , University of South Florida , Tampa , FL , USA.,d Department of Chemical and Biomedical Engineering , University of South Florida , Tampa , FL , USA.,e Department of Communication Sciences and Disorders , University of South Florida , Tampa , FL , USA
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Linnenschmidt M, Wiegrebe L. Ontogeny of auditory brainstem responses in the bat, Phyllostomus discolor. Hear Res 2019; 373:85-95. [PMID: 30612027 DOI: 10.1016/j.heares.2018.12.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 11/23/2018] [Accepted: 12/21/2018] [Indexed: 01/15/2023]
Abstract
Hearing is the primary sensory modality in bats, but its development is poorly studied. For newborns, hearing appears essential in maintaining contact with their mothers and to develop echolocation abilities. Here we measured auditory brainstem responses (ABRs) to clicks and narrowband tone pips covering a large frequency range (5-90 kHz) in juveniles (p7 to p200) and adults of the bat, Phyllostomus discolor. Tone-pip audiograms show that juveniles at p7 are already quite responsive, not only below 20 kHz but up to 90 kHz. Hearing sensitivity increases further until about p14 and is then refined, possibly correlated with growth and differentiation of the animals' outer ears. ABR amplitudes decrease within the first 3-4 months, inversely correlated with the bat weight and forearm length. ABR Wave I latency decreases with increasing stimulation level. ABR duration (measured between Waves I and V) is longer in juveniles and shortens with age which may reflect temporal refinement of auditory brainstem neurons to accommodate the exceptional temporal precision required for effective echolocation. Overall our data show that P. discolor bats have good hearing very early in life. The current method represents a fast and minimally invasive way of characterizing basic hearing in bats.
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Affiliation(s)
- Meike Linnenschmidt
- Division of Neurobiology, Dept. Biology II, Ludwig-Maximilians-University Munich, Großhaderner Str. 2, 82152, Planegg-Martinsried, Germany.
| | - Lutz Wiegrebe
- Division of Neurobiology, Dept. Biology II, Ludwig-Maximilians-University Munich, Großhaderner Str. 2, 82152, Planegg-Martinsried, Germany.
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Bortolozzi M, Mammano F. PMCA2 pump mutations and hereditary deafness. Neurosci Lett 2019; 663:18-24. [PMID: 29452611 DOI: 10.1016/j.neulet.2017.09.059] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 09/25/2017] [Accepted: 09/28/2017] [Indexed: 01/21/2023]
Abstract
Hair cells of the inner ear detect sound stimuli, inertial or gravitational forces by deflection of their apical stereocilia. A small number of stereociliary cation-selective mechanotransduction (MET) channels admit K+ and Ca2+ ions into the cytoplasm promoting hair cell membrane depolarization and, consequently, neurotransmitter release at the cell basolateral pole. Ca2+ influx into the stereocilia compartment is counteracted by the unusual w/a splicing variant of plasma-membrane calcium-pump isoform 2 (PMCA2) which, unlike other PMCA2 variants, increases only marginally its activity in response to a rapid variation of the cytoplasmic free Ca2+ concentration ([Ca2+]c). Missense mutations of PMCA2w/a cause deafness and loss of balance in humans. Mouse models in which the pump is genetically ablated or mutated show hearing and balance impairment, which correlates with defects in homeostatic regulation of stereociliary [Ca2+]c, decreased sensitivity of mechanotransduction channels to hair bundle displacement and progressive degeneration of the organ of Corti. These results highlight a critical role played by the PMCA2w/a pump in the control of hair cell function and survival, and provide mechanistic insight into the etiology of deafness and vestibular disorders.
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Affiliation(s)
- Mario Bortolozzi
- University of Padua, Department of Physics and Astronomy "G. Galilei", Padua, Italy; Venetian Institute of Molecular Medicine (VIMM), Padua, Italy; CNR Institute of Protein Biochemistry, Naples, Italy.
| | - Fabio Mammano
- University of Padua, Department of Physics and Astronomy "G. Galilei", Padua, Italy; Venetian Institute of Molecular Medicine (VIMM), Padua, Italy; CNR Institute of Cell Biology and Neurobiology, Monterotondo Scalo, Rome, Italy
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Atypical Auditory Brainstem Response and Protein Expression Aberrations Related to ASD and Hearing Loss in the Adnp Haploinsufficient Mouse Brain. Neurochem Res 2019; 44:1494-1507. [PMID: 30659505 DOI: 10.1007/s11064-019-02723-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 01/07/2019] [Accepted: 01/08/2019] [Indexed: 12/23/2022]
Abstract
Autism is a wide spread neurodevelopmental disorder with growing morbidity rates, affecting more boys than girls worldwide. Activity-dependent neuroprotective protein (ADNP) was recently recognized as a leading gene accounted for 0.17% of autism spectrum disorder (ASD) cases globally. Respectively, mutations in the human ADNP gene (ADNP syndrome), cause multi-system body dysfunctions with apparent ASD-related traits, commencing as early as childhood. The Adnp haploinsufficient (Adnp+/-) mouse model was researched before in relations to Alzheimer's disease and autism. Adnp+/- mice suffer from deficient social memory, vocal and motor impediments, irregular tooth eruption and short stature, all of which corresponds with reported phenotypes in patients with the ADNP syndrome. Recently, a more elaborated description of the ADNP syndrome was published, presenting impediments such as hearing disabilities in > 10% of the studied children. Irregular auditory brainstem response (ABR) has been connected to ASD-related cases and has been suggested as a potential hallmark for autism, allowing diagnosis of ASD risk and early intervention. Herein, we present detriment hearing in the Adnp+/- mice with atypical ABR and significant protein expression irregularities that coincides with ASD and hearing loss studies in the brain.
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Geissler DB, Weiler E, Ehret G. Adaptation and spectral enhancement at auditory temporal perceptual boundaries - Measurements via temporal precision of auditory brainstem responses. PLoS One 2018; 13:e0208935. [PMID: 30571726 PMCID: PMC6301773 DOI: 10.1371/journal.pone.0208935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 11/26/2018] [Indexed: 12/21/2022] Open
Abstract
In human and animal auditory perception the perceived quality of sound streams changes depending on the duration of inter-sound intervals (ISIs). Here, we studied whether adaptation and the precision of temporal coding in the auditory periphery reproduce general perceptual boundaries in the time domain near 20, 100, and 400 ms ISIs, the physiological origin of which are unknown. In four experiments, we recorded auditory brainstem responses with five wave peaks (P1 –P5) in response to acoustic models of communication calls of house mice, who perceived these calls with the mentioned boundaries. The newly introduced measure of average standard deviations of wave latencies of individual animals indicate the waves’ temporal precision (latency jitter) mostly in the range of 30–100 μs, very similar to latency jitter of single neurons. Adaptation effects of response latencies and latency jitter were measured for ISIs of 10–1000 ms. Adaptation decreased with increasing ISI duration following exponential or linear (on a logarithmic scale) functions in the range of up to about 200 ms ISIs. Adaptation effects were specific for each processing level in the auditory system. The perceptual boundaries near 20–30 and 100 ms ISIs were reflected in significant adaptation of latencies together with increases of latency jitter at P2-P5 for ISIs < ~30 ms and at P5 for ISIs < ~100 ms, respectively. Adaptation effects occurred when frequencies in a sound stream were within the same critical band. Ongoing low-frequency components/formants in a sound enhanced (decrease of latencies) coding of high-frequency components/formants when the frequencies concerned different critical bands. The results are discussed in the context of coding multi-harmonic sounds and stop-consonants-vowel pairs in the auditory brainstem. Furthermore, latency data at P1 (cochlea level) offer a reasonable value for the base-to-apex cochlear travel time in the mouse (0.342 ms) that has not been determined experimentally.
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Affiliation(s)
| | - Elke Weiler
- Institute of Neurobiology, University of Ulm, Ulm, Germany
| | - Günter Ehret
- Institute of Neurobiology, University of Ulm, Ulm, Germany
- * E-mail:
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38
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Duque D, Pais R, Malmierca MS. Stimulus-specific adaptation in the anesthetized mouse revealed by brainstem auditory evoked potentials. Hear Res 2018; 370:294-301. [DOI: 10.1016/j.heares.2018.08.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 08/06/2018] [Accepted: 08/29/2018] [Indexed: 11/28/2022]
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Rigueur D, Roberts RR, Bobzin L, Merrill AE. A requirement for Fgfr2 in middle ear development. Genesis 2018; 57:e23252. [PMID: 30253032 DOI: 10.1002/dvg.23252] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 09/17/2018] [Accepted: 09/18/2018] [Indexed: 12/12/2022]
Abstract
The skeletal structure of the mammalian middle ear, which is composed of three endochondral ossicles suspended within a membranous air-filled capsule, plays a critical role in conducting sound. Gene mutations that alter skeletal development in the middle ear result in auditory impairment. Mutations in fibroblast growth factor receptor 2 (FGFR2), an important regulator of endochondral and intramembranous bone formation, cause a spectrum of congenital skeletal disorders featuring conductive hearing loss. Although the middle ear malformations in multiple FGFR2 gain-of-function disorders are clinically characterized, those in the FGFR2 loss-of-function disorder lacrimo-auriculo-dento-digital (LADD) syndrome are relatively undescribed. To better understand conductive hearing loss in LADD, we examined the middle ear skeleton of mice with conditional loss of Fgfr2. We find that decreased auditory function in Fgfr2 mutant mice correlates with hypoplasia of the auditory bulla and ectopic bone growth at sites of tendon/ligament attachment. We show that ectopic bone associated with the intra-articular ligaments of the incudomalleal joint is derived from Scx-expressing cells and preceded by decreased expression of the joint progenitor marker Gdf5. Together, these results identify a role for Fgfr2 in development of the middle ear skeletal tissues and suggest potential causes for conductive hearing loss in LADD syndrome.
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Affiliation(s)
- Diana Rigueur
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, California.,Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
| | - Ryan R Roberts
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, California.,Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
| | - Lauren Bobzin
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, California.,Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
| | - Amy E Merrill
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, California.,Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
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Central Compensation in Auditory Brainstem after Damaging Noise Exposure. eNeuro 2018; 5:eN-CFN-0250-18. [PMID: 30123822 PMCID: PMC6096756 DOI: 10.1523/eneuro.0250-18.2018] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 07/19/2018] [Indexed: 12/15/2022] Open
Abstract
Noise exposure is one of the most common causes of hearing loss and peripheral damage to the auditory system. A growing literature suggests that the auditory system can compensate for peripheral loss through increased central neural activity. The current study sought to investigate the link between noise exposure, increases in central gain, synaptic reorganization, and auditory function. All axons of the auditory nerve project to the cochlear nucleus, making it a requisite nucleus for sound detection. As the first synapse in the central auditory system, the cochlear nucleus is well positioned to respond plastically to loss of peripheral input. To investigate noise-induced compensation in the central auditory system, we measured auditory brainstem responses (ABRs) and auditory perception and collected tissue from mice exposed to broadband noise. Noise-exposed mice showed elevated ABR thresholds, reduced ABR wave 1 amplitudes, and spiral ganglion neuron loss. Despite peripheral damage, noise-exposed mice were hyperreactive to loud sounds and showed nearly normal behavioral sound detection thresholds. Ratios of late ABR peaks (2–4) relative to the first ABR peak indicated that brainstem pathways were hyperactive in noise-exposed mice, while anatomical analysis indicated there was an imbalance between expression of excitatory and inhibitory proteins in the ventral cochlear nucleus. The results of the current study suggest that a reorganization of excitation and inhibition in the ventral cochlear nucleus may drive hyperactivity in the central auditory system. This increase in central gain can compensate for peripheral loss to restore some aspects of auditory function.
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Zhang ZJ, Guan HX, Yang K, Xiao BK, Liao H, Jiang Y, Zhou T, Hua QQ. Estimation of the status of spiral ganglion neurons and Schwann cells in the auditory neural degeneration mouse using the auditory brainstem response. Acta Otolaryngol 2018; 138:603-609. [PMID: 29553844 DOI: 10.1080/00016489.2018.1436766] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
CONCLUSION The auditory brainstem response (ABR) wave I threshold, latency and amplitude are insensitive to spiral ganglion neurons (SGNs) degeneration, but are sensitive to the degeneration of Schwann cells and can estimate the status of Schwann cells in a neural degeneration mouse model. The thorough pre-operative ABR assessment would be helpful in predicting cochlear implant performance. OBJECTIVES This study aimed in finding a non-invasive electrophysiological method to evaluate the status of the auditory nerve and the Schwann cells in sensorineural hearing loss (SNHL) and auditory neuropathy (AN) ears, and providing useful information for candidates screening and outcome prediction in cochlear implantation. METHODS The frequency-specific acoustic ABR was recorded in mice. The immunohistochemical staining was performed to detect the SGNs and Schwann cells in mice cochlea. The correlations between ABR wave I metrics and SGNs, Schwann cells were investigated. RESULTS In SNHL and AN mice cochlea, statistically significant correlations between ABR wave I thresholds, latencies and amplitudes at 8, 16, and 32 kHz and their corresponding SGNs densities were found only in wave I amplitude at 8 kHz. While the ABR wave I metrics at all three frequencies showed strong significant correlations with their corresponding Schwann cells densities.
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Affiliation(s)
- Zhi-Jian Zhang
- Department of Otolaryngology – Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Hong-Xia Guan
- Department of Otolaryngology – Head and Neck Surgery, Hubei Maternal and Child Health Hospital, Wuhan, China
| | - Kun Yang
- Department of Otolaryngology – Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Bo-Kui Xiao
- Department of Otolaryngology – Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Hua Liao
- Department of Otolaryngology – Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yang Jiang
- Department of Otolaryngology – Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Tao Zhou
- Department of Otolaryngology – Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China
| | - Qing-Quan Hua
- Department of Otolaryngology – Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China
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Yang Y, Zhu B, Wang J, Brauth SE, Tang Y, Cui J. A test of the matched filter hypothesis in two sympatric frogs, Chiromantis doriae and Feihyla vittata. BIOACOUSTICS 2018. [DOI: 10.1080/09524622.2018.1482786] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Yue Yang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Bicheng Zhu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Jichao Wang
- Department of Biology, Hainan Normal University, Haikou, Hainan, China
| | - Steven E. Brauth
- Department of Psychology, University of Maryland, College Park, USA
| | - Yezhong Tang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan, China
| | - Jianguo Cui
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan, China
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Barbee CM, James JA, Park JH, Smith EM, Johnson CE, Clifton S, Danhauer JL. Effectiveness of Auditory Measures for Detecting Hidden Hearing Loss and/or Cochlear Synaptopathy: A Systematic Review. Semin Hear 2018; 39:172-209. [PMID: 29915454 DOI: 10.1055/s-0038-1641743] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Standard audiometric evaluations are not sensitive enough to identify hidden hearing loss (HHL) and/or cochlear synaptopathy (CS). Patients with either of these conditions frequently present with difficulty understanding speech in noise or other complaints such as tinnitus. The purpose of this systematic review is to identify articles in peer-reviewed journals that assessed the sensitivity of audiologic measures for detecting HHL and/or CS, and which showed potential for use in a clinical test battery for these disorders. A reference librarian submitted specific boolean terminology to MEDLINE, Embase, and Web of Science. The authors used a consensus approach with specially designed score sheets for the selection of titles, abstracts, and then articles for inclusion in the systematic review and for quality assessment. Fifteen articles were included in the systematic review. Seven articles involved humans; seven involved animals, and one study used both humans and animals. Results showed that pure-tone audiometry to 20 kHz, otoacoustic emissions, electrocochleography, auditory brainstem response (ABR), electrophysiological tests, speech recognition in noise with and without temporal distortion, interviews, and self-report measures have been used to assess HHL and/or CS. For HHL, ultra-high-frequency audiometry may help identify persons with sensory hair cell loss that does not show up on standard audiograms. Promising nonbehavioral measures for CS included ABR wave I amplitude, the summating potential-to-action potential ratio, and speech recognition in noise with and without temporal distortion. Self-report questionnaires also may help identify auditory dysfunction in persons with normal hearing.
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Affiliation(s)
- Christi M Barbee
- Hearing Evaluation, Rehabilitation, and Outcomes Laboratory, Department of Communication Sciences and Disorders, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Jessica A James
- Hearing Evaluation, Rehabilitation, and Outcomes Laboratory, Department of Communication Sciences and Disorders, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Jin Hyung Park
- Hearing Evaluation, Rehabilitation, and Outcomes Laboratory, Department of Communication Sciences and Disorders, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Emily M Smith
- Hearing Evaluation, Rehabilitation, and Outcomes Laboratory, Department of Communication Sciences and Disorders, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Carole E Johnson
- Hearing Evaluation, Rehabilitation, and Outcomes Laboratory, Department of Communication Sciences and Disorders, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Shari Clifton
- Hearing Evaluation, Rehabilitation, and Outcomes Laboratory, Department of Communication Sciences and Disorders, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Jeffrey L Danhauer
- Department of Speech and Hearing Sciences, University of California Santa Barbara, Santa Barbara, California
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White K, Kim MJ, Han C, Park HJ, Ding D, Boyd K, Walker L, Linser P, Meneses Z, Slade C, Hirst J, Santostefano K, Terada N, Miyakawa T, Tanokura M, Salvi R, Someya S. Loss of IDH2 Accelerates Age-related Hearing Loss in Male Mice. Sci Rep 2018; 8:5039. [PMID: 29567975 PMCID: PMC5864918 DOI: 10.1038/s41598-018-23436-w] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 03/13/2018] [Indexed: 11/29/2022] Open
Abstract
Isocitrate dehydrogenase (IDH) 2 participates in the TCA cycle and catalyzes the conversion of isocitrate to α-ketoglutarate and NADP+ to NADPH. In the mitochondria, IDH2 also plays a key role in protecting mitochondrial components from oxidative stress by supplying NADPH to both glutathione reductase (GSR) and thioredoxin reductase 2 (TXNRD2). Here, we report that loss of Idh2 accelerates age-related hearing loss, the most common form of hearing impairment, in male mice. This was accompanied by increased oxidative DNA damage, increased apoptotic cell death, and profound loss of spiral ganglion neurons and hair cells in the cochlea of 24-month-old Idh2−/− mice. In young male mice, loss of Idh2 resulted in decreased NADPH redox state and decreased activity of TXNRD2 in the mitochondria of the inner ear. In HEI-OC1 mouse inner ear cell lines, knockdown of Idh2 resulted in a decline in cell viability and mitochondrial oxygen consumption. This was accompanied by decreased NADPH redox state and decreased activity of TXNRD2 in the mitochondria of the HEI-OC1 cells. Therefore, IDH2 functions as the principal source of NADPH for the mitochondrial thioredoxin antioxidant defense and plays an essential role in protecting hair cells and neurons against oxidative stress in the cochlea of male mice.
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Affiliation(s)
- Karessa White
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Mi-Jung Kim
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Chul Han
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Hyo-Jin Park
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Dalian Ding
- Center for Hearing and Deafness, State University of New York at Buffalo, New York, 14214, United States
| | - Kevin Boyd
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Logan Walker
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Paul Linser
- Whitney Laboratory, University of Florida, St Augustine, Florida, 32080, United States
| | - Zaimary Meneses
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Cole Slade
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Jonathan Hirst
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States
| | - Katherine Santostefano
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL, 32610, United States
| | - Naohiro Terada
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL, 32610, United States
| | - Takuya Miyakawa
- Department of Applied Biological Chemistry, University of Tokyo, Yayoi, Tokyo, 113, Japan
| | - Masaru Tanokura
- Department of Applied Biological Chemistry, University of Tokyo, Yayoi, Tokyo, 113, Japan
| | - Richard Salvi
- Center for Hearing and Deafness, State University of New York at Buffalo, New York, 14214, United States
| | - Shinichi Someya
- Department of Aging and Geriatric Research, University of Florida, Gainesville, Florida, 32610, United States.
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45
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Zorzi V, Paciello F, Ziraldo G, Peres C, Mazzarda F, Nardin C, Pasquini M, Chiani F, Raspa M, Scavizzi F, Carrer A, Crispino G, Ciubotaru CD, Monyer H, Fetoni AR, M Salvatore A, Mammano F. Mouse Panx1 Is Dispensable for Hearing Acquisition and Auditory Function. Front Mol Neurosci 2017; 10:379. [PMID: 29234270 PMCID: PMC5712377 DOI: 10.3389/fnmol.2017.00379] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 10/30/2017] [Indexed: 11/13/2022] Open
Abstract
Panx1 forms plasma membrane channels in brain and several other organs, including the inner ear. Biophysical properties, activation mechanisms and modulators of Panx1 channels have been characterized in detail, however the impact of Panx1 on auditory function is unclear due to conflicts in published results. To address this issue, hearing performance and cochlear function of the Panx1−/− mouse strain, the first with a reported global ablation of Panx1, were scrutinized. Male and female homozygous (Panx1−/−), hemizygous (Panx1+/−) and their wild type (WT) siblings (Panx1+/+) were used for this study. Successful ablation of Panx1 was confirmed by RT-PCR and Western immunoblotting in the cochlea and brain of Panx1−/− mice. Furthermore, a previously validated Panx1-selective antibody revealed strong immunoreactivity in WT but not in Panx1−/− cochleae. Hearing sensitivity, outer hair cell-based “cochlear amplifier” and cochlear nerve function, analyzed by auditory brainstem response (ABR) and distortion product otoacoustic emission (DPOAE) recordings, were normal in Panx1+/− and Panx1−/− mice. In addition, we determined that global deletion of Panx1 impacts neither on connexin expression, nor on gap-junction coupling in the developing organ of Corti. Finally, spontaneous intercellular Ca2+ signal (ICS) activity in organotypic cochlear cultures, which is key to postnatal development of the organ of Corti and essential for hearing acquisition, was not affected by Panx1 ablation. Therefore, our results provide strong evidence that, in mice, Panx1 is dispensable for hearing acquisition and auditory function.
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Affiliation(s)
- Veronica Zorzi
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,School of Medicine, Institute of Otolaryngology, Catholic University, Rome, Italy
| | - Fabiola Paciello
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | - Gaia Ziraldo
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,School of Medicine, Institute of Otolaryngology, Catholic University, Rome, Italy
| | - Chiara Peres
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | - Flavia Mazzarda
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Department of Science, Roma Tre University, Rome, Italy
| | - Chiara Nardin
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Department of Science, Roma Tre University, Rome, Italy
| | - Miriam Pasquini
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, Rome, Italy
| | - Francesco Chiani
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | - Marcello Raspa
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | | | - Andrea Carrer
- Department of Physics and Astronomy G. Galilei, University of Padua, Padua, Italy
| | - Giulia Crispino
- Department of Physics and Astronomy G. Galilei, University of Padua, Padua, Italy
| | | | - Hannah Monyer
- Department of Clinical Neurobiology, Deutches Krebforschungzentrum, University of Heidelberg, Heidelberg, Germany
| | - Anna R Fetoni
- School of Medicine, Institute of Otolaryngology, Catholic University, Rome, Italy
| | - Anna M Salvatore
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | - Fabio Mammano
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Department of Physics and Astronomy G. Galilei, University of Padua, Padua, Italy.,Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China
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46
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Ebbers L, Weber M, Nothwang HG. Activity-dependent formation of a vesicular inhibitory amino acid transporter gradient in the superior olivary complex of NMRI mice. BMC Neurosci 2017; 18:75. [PMID: 29073893 PMCID: PMC5659004 DOI: 10.1186/s12868-017-0393-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 10/13/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In the mammalian superior olivary complex (SOC), synaptic inhibition contributes to the processing of binaural sound cues important for sound localization. Previous analyses demonstrated a tonotopic gradient for postsynaptic proteins mediating inhibitory neurotransmission in the lateral superior olive (LSO), a major nucleus of the SOC. To probe, whether a presynaptic molecular gradient exists as well, we investigated immunoreactivity against the vesicular inhibitory amino acid transporter (VIAAT) in the mouse auditory brainstem. RESULTS Immunoreactivity against VIAAT revealed a gradient in the LSO and the superior paraolivary nucleus (SPN) of NMRI mice, with high expression in the lateral, low frequency processing limb and low expression in the medial, high frequency processing limb of both nuclei. This orientation is opposite to the previously reported gradient of glycine receptors in the LSO. Other nuclei of the SOC showed a uniform distribution of VIAAT-immunoreactivity. No gradient was observed for the glycine transporter GlyT2 and the neuronal protein NeuN. Formation of the VIAAT gradient was developmentally regulated and occurred around hearing-onset between postnatal days 8 and 16. Congenital deaf Claudin14 -/- mice bred on an NMRI background showed a uniform VIAAT-immunoreactivity in the LSO, whereas cochlear ablation in NMRI mice after hearing-onset did not affect the gradient. Additional analysis of C57Bl6/J, 129/SvJ and CBA/J mice revealed a strain-specific formation of the gradient. CONCLUSIONS Our results identify an activity-regulated gradient of VIAAT in the SOC of NRMI mice. Its absence in other mouse strains adds a novel layer of strain-specific features in the auditory system, i.e. tonotopic organization of molecular gradients. This calls for caution when comparing data from different mouse strains frequently used in studies involving transgenic animals. The presence of strain-specific differences offers the possibility of genetic mapping to identify molecular factors involved in activity-dependent developmental processes in the auditory system. This would provide an important step forward concerning improved auditory rehabilitation in cases of congenital deafness.
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Affiliation(s)
- Lena Ebbers
- Neurogenetics Group, Center of Excellence Hearing4All, School of Medicine and Health Sciences, Carl von Ossietzky University Oldenburg, 26111 Oldenburg, Germany
| | - Maren Weber
- Neurogenetics Group, Center of Excellence Hearing4All, School of Medicine and Health Sciences, Carl von Ossietzky University Oldenburg, 26111 Oldenburg, Germany
| | - Hans Gerd Nothwang
- Neurogenetics Group, Center of Excellence Hearing4All, School of Medicine and Health Sciences, Carl von Ossietzky University Oldenburg, 26111 Oldenburg, Germany
- Research Center for Neurosensory Science, Carl von Ossietzky University Oldenburg, 26111 Oldenburg, Germany
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47
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Hordeaux J, Dubreil L, Robveille C, Deniaud J, Pascal Q, Dequéant B, Pailloux J, Lagalice L, Ledevin M, Babarit C, Costiou P, Jamme F, Fusellier M, Mallem Y, Ciron C, Huchet C, Caillaud C, Colle MA. Long-term neurologic and cardiac correction by intrathecal gene therapy in Pompe disease. Acta Neuropathol Commun 2017; 5:66. [PMID: 28874182 PMCID: PMC5585940 DOI: 10.1186/s40478-017-0464-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 08/07/2017] [Indexed: 11/10/2022] Open
Abstract
Pompe disease is a lysosomal storage disorder caused by acid-α-glucosidase (GAA) deficiency, leading to glycogen storage. The disease manifests as a fatal cardiomyopathy in infantile form. Enzyme replacement therapy (ERT) has recently prolonged the lifespan of these patients, revealing a new natural history. The neurologic phenotype and the persistence of selective muscular weakness in some patients could be attributed to the central nervous system (CNS) storage uncorrected by ERT. GAA-KO 6neo/6neo mice were treated with a single intrathecal administration of adeno-associated recombinant vector (AAV) mediated gene transfer of human GAA at 1 month and their neurologic, neuromuscular, and cardiac function was assessed for 1 year. We demonstrate a significant functional neurologic correction in treated animals from 4 months onward, a neuromuscular improvement from 9 months onward, and a correction of the hypertrophic cardiomyopathy at 12 months. The regions most affected by the disease i.e. the brainstem, spinal cord, and the left cardiac ventricular wall all show enzymatic, biochemical and histological correction. Muscle glycogen storage is not affected by the treatment, thus suggesting that the restoration of muscle functionality is directly related to the CNS correction. This unprecedented global and long-term CNS and cardiac cure offer new perspectives for the management of patients.
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48
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Han C, Kim MJ, Ding D, Park HJ, White K, Walker L, Gu T, Tanokura M, Yamasoba T, Linser P, Salvi R, Someya S. GSR is not essential for the maintenance of antioxidant defenses in mouse cochlea: Possible role of the thioredoxin system as a functional backup for GSR. PLoS One 2017; 12:e0180817. [PMID: 28686716 PMCID: PMC5501606 DOI: 10.1371/journal.pone.0180817] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 06/21/2017] [Indexed: 11/18/2022] Open
Abstract
Glutathione reductase (GSR), a key member of the glutathione antioxidant defense system, converts oxidized glutathione (GSSG) to reduced glutathione (GSH) and maintains the intracellular glutathione redox state to protect the cells from oxidative damage. Previous reports have shown that Gsr deficiency results in defects in host defense against bacterial infection, while diquat induces renal injury in Gsr hypomorphic mice. In flies, overexpression of GSR extended lifespan under hyperoxia. In the current study, we investigated the roles of GSR in cochlear antioxidant defense using Gsr homozygous knockout mice that were backcrossed onto the CBA/CaJ mouse strain, a normal-hearing strain that does not carry a specific Cdh23 mutation that causes progressive hair cell degeneration and early onset of hearing loss. Gsr-/- mice displayed a significant decrease in GSR activity and GSH/GSSG ratios in the cytosol of the inner ears. However, Gsr deficiency did not affect ABR (auditory brainstem response) hearing thresholds, wave I amplitudes or wave I latencies in young mice. No histological abnormalities were observed in the cochlea of Gsr-/- mice. Furthermore, there were no differences in the activities of cytosolic glutathione-related enzymes, including glutathione peroxidase and glutamate-cysteine ligase, or the levels of oxidative damage markers in the inner ears between WT and Gsr-/- mice. In contrast, Gsr deficiency resulted in increased activities of cytosolic thioredoxin and thioredoxin reductase in the inner ears. Therefore, under normal physiological conditions, GSR is not essential for the maintenance of antioxidant defenses in mouse cochlea. Given that the thioredoxin system is known to reduce GSSG to GSH in multiple species, our findings suggest that the thioredoxin system can support GSSG reduction in the mouse peripheral auditory system.
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Affiliation(s)
- Chul Han
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, United States of America
| | - Mi-Jung Kim
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, United States of America
| | - Dalian Ding
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, United States of America
| | - Hyo-Jin Park
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, United States of America
- Whitney Laboratory, University of Florida, St Augustine, FL, United States of America
| | - Karessa White
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, United States of America
| | - Logan Walker
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, United States of America
| | - Tongjun Gu
- Bioinformatics, Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL, United States of America
| | - Masaru Tanokura
- Department of Applied Biological Chemistry, University of Tokyo, Yayoi, Tokyo, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology, University of Tokyo, Hongo, Tokyo, Japan
| | - Paul Linser
- Whitney Laboratory, University of Florida, St Augustine, FL, United States of America
| | - Richard Salvi
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, United States of America
| | - Shinichi Someya
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, United States of America
- * E-mail:
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49
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Nguyen A, Khaleel HM, Razak KA. Effects of noise-induced hearing loss on parvalbumin and perineuronal net expression in the mouse primary auditory cortex. Hear Res 2017; 350:82-90. [PMID: 28460252 DOI: 10.1016/j.heares.2017.04.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 04/19/2017] [Accepted: 04/24/2017] [Indexed: 12/17/2022]
Abstract
Noise induced hearing loss is associated with increased excitability in the central auditory system but the cellular correlates of such changes remain to be characterized. Here we tested the hypothesis that noise-induced hearing loss causes deterioration of perineuronal nets (PNNs) in the auditory cortex of mice. PNNs are specialized extracellular matrix components that commonly enwrap cortical parvalbumin (PV) containing GABAergic interneurons. Compared to somatosensory and visual cortex, relatively less is known about PV/PNN expression patterns in the primary auditory cortex (A1). Whether changes to cortical PNNs follow acoustic trauma remains unclear. The first aim of this study was to characterize PV/PNN expression in A1 of adult mice. PNNs increase excitability of PV+ inhibitory neurons and confer protection to these neurons against oxidative stress. Decreased PV/PNN expression may therefore lead to a reduction in cortical inhibition. The second aim of this study was to examine PV/PNN expression in superficial (I-IV) and deep cortical layers (V-VI) following noise trauma. Exposing mice to loud noise caused an increase in hearing threshold that lasted at least 30 days. PV and PNN expression in A1 was analyzed at 1, 10 and 30 days following the exposure. No significant changes were observed in the density of PV+, PNN+, or PV/PNN co-localized cells following hearing loss. However, a significant layer- and cell type-specific decrease in PNN intensity was seen following hearing loss. Some changes were present even at 1 day following noise exposure. Attenuation of PNN may contribute to changes in excitability in cortex following noise trauma. The regulation of PNN may open up a temporal window for altered excitability in the adult brain that is then stabilized at a new and potentially pathological level such as in tinnitus.
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Affiliation(s)
- Anna Nguyen
- Bioengineering Program, University of California, Riverside, United States
| | - Haroun M Khaleel
- Psychology Department and Graduate Neuroscience Program, University of California, Riverside, United States
| | - Khaleel A Razak
- Psychology Department and Graduate Neuroscience Program, University of California, Riverside, United States.
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50
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Miyoshi T, Yamaguchi T, Ogita K, Tanaka Y, Ishibashi KI, Ito H, Kobayashi T, Nakagawa T, Ito J, Omori K, Yamamoto N. Quantitative Analysis of Aquaporin Expression Levels during the Development and Maturation of the Inner Ear. J Assoc Res Otolaryngol 2016; 18:247-261. [PMID: 28004290 DOI: 10.1007/s10162-016-0607-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Accepted: 11/24/2016] [Indexed: 01/30/2023] Open
Abstract
Aquaporins (AQPs) are a family of small membrane proteins that transport water molecules across the plasma membrane along the osmotic gradient. Mammals express 13 subtypes of AQPs, including the recently reported "subcellular AQPs", AQP11 and 12. Each organ expresses specific subsets of AQP subtypes, and in the inner ear, AQPs are essential for the establishment and maintenance of two distinct fluids, endolymph and perilymph. To evaluate the contribution of AQPs during the establishment of inner ear function, we used quantitative reverse transcription polymerase chain reaction to quantify the expression levels of all known AQPs during the entire development and maturation of the inner ear. Using systematic and longitudinal quantification, we found that AQP11 was majorly and constantly expressed in the inner ear, and that the expression levels of several AQPs follow characteristic longitudinal patterns: increasing (Aqp0, 1, and 9), decreasing (Aqp6, 8, and 12), and peak of expression on E18 (Aqp2, 5, and 7). In particular, the expression level of Aqp9 increased by 70-fold during P3-P21. We also performed in situ hybridization of Aqp11, and determined the unique localization of Aqp11 in the outer hair cells. Immunohistochemistry of AQP9 revealed its localization in the supporting cells inside the organ of Corti, and in the root cells. The emergence of AQP9 expression in these cells was during P3-P21, which was coincident with the marked increase of its expression level. Combining these quantification and localization data, we discuss the possible contributions of these AQPs to inner ear function.
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Affiliation(s)
- Takushi Miyoshi
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Kyoto, Japan
| | - Taro Yamaguchi
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Setsunan University, Neyagawa, 572-0074, Osaka, Japan
| | - Kiyokazu Ogita
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Setsunan University, Neyagawa, 572-0074, Osaka, Japan
| | - Yasuko Tanaka
- Department of Medical Physiology, Meiji Pharmaceutical University, Kiyose, 204-0004, Tokyo, Japan
| | - Ken-Ichi Ishibashi
- Department of Medical Physiology, Meiji Pharmaceutical University, Kiyose, 204-0004, Tokyo, Japan
| | - Hiroaki Ito
- Department of Otolaryngology, Head and Neck Surgery, Kochi Medical School, Nangoku, 783-0043, Kochi, Japan
| | - Taisuke Kobayashi
- Department of Otolaryngology, Head and Neck Surgery, Kochi Medical School, Nangoku, 783-0043, Kochi, Japan
| | - Takayuki Nakagawa
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Kyoto, Japan
| | - Juichi Ito
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Kyoto, Japan.,Shiga Medical Center Research Institute, Moriyama, 524-0022, Shiga, Japan
| | - Koichi Omori
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Kyoto, Japan
| | - Norio Yamamoto
- Department of Otolaryngology, Head and Neck Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Kyoto, Japan.
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