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Jiang Q, Liang X, Ye T, Zhang Y, Lou B. Metabonomics and Transcriptomics Analyses Reveal the Development Process of the Auditory System in the Embryonic Development Period of the Small Yellow Croaker under Background Noise. Int J Mol Sci 2024; 25:1954. [PMID: 38396633 PMCID: PMC10888356 DOI: 10.3390/ijms25041954] [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: 12/07/2023] [Revised: 01/25/2024] [Accepted: 01/30/2024] [Indexed: 02/25/2024] Open
Abstract
Underwater noise pollution has become a potential threat to aquatic animals in the natural environment. The main causes of such pollution are frequent human activities creating underwater environmental noise, including commercial shipping, offshore energy platforms, scientific exploration activities, etc. However, in aquaculture environments, underwater noise pollution has also become an unavoidable problem due to background noise created by aquaculture equipment. Some research has shown that certain fish show adaptability to noise over a period of time. This could be due to fish's special auditory organ, i.e., their "inner ear"; meanwhile, otoliths and sensory hair cells are the important components of the inner ear and are also essential for the function of the auditory system. Recently, research in respect of underwater noise pollution has mainly focused on adult fish, and there is a lack of the research on the effects of underwater noise pollution on the development process of the auditory system in the embryonic development period. Thus, in this study, we collected embryo-larval samples of the small yellow croaker (Larimichthys polyactis) in four important stages of otic vesicle development through artificial breeding. Then, we used metabonomics and transcriptomics analyses to reveal the development process of the auditory system in the embryonic development period under background noise (indoor and underwater environment sound). Finally, we identified 4026 differentially expressed genes (DEGs) and 672 differential metabolites (DMs), including 37 DEGs associated with the auditory system, and many differences mainly existed in the neurula stage (20 h of post-fertilization/20 HPF). We also inferred the regulatory mode and process of some important DEGs (Dnmt1, CPS1, and endothelin-1) in the early development of the auditory system. In conclusion, we suggest that the auditory system development of L. polyactis begins at least in the neurula stage or earlier; the other three stages (tail bud stage, caudal fin fold stage, and heart pulsation stage, 28-35 HPF) mark the rapid development period. We speculate that the effect of underwater noise pollution on the embryo-larval stage probably begins even earlier.
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Affiliation(s)
| | | | | | | | - Bao Lou
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310000, China; (Q.J.); (X.L.); (T.Y.); (Y.Z.)
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2
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Marcé-Nogué J, Liu J. Finite element modelling of sound transmission in the Weberian apparatus of zebrafish ( Danio rerio). J R Soc Interface 2024; 21:20230553. [PMID: 38196376 PMCID: PMC10777150 DOI: 10.1098/rsif.2023.0553] [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: 09/20/2023] [Accepted: 12/07/2023] [Indexed: 01/11/2024] Open
Abstract
Zebrafish, an essential vertebrate model, has greatly expanded our understanding of hearing. However, one area that remains unexplored is the biomechanics of the Weberian apparatus, crucial for sound conduction and perception. Using micro-computed tomography (μCT) bioimaging, we created three-dimensional finite element models of the zebrafish Weberian ossicles. These models ranged from the exact size to scaled isometric versions with constrained geometry (1 to 10 mm in ossicular chain length). Harmonic finite element analysis of all 11 models revealed that the resonance frequency of the zebrafish's Weberian ossicular chain is approximately 900 Hz, matching their optimal hearing range. Interestingly, resonance frequency negatively correlated with size, while the ratio of peak displacement and difference of resonance frequency between tripus and scaphium remained constant. This suggests the transmission efficiency of the ossicular chain and the homogeneity of resonance frequency at both ends of the chain are not size-dependent. We conclude that the Weberian apparatus's resonance frequency can explain zebrafish's best hearing frequency, and their biomechanical characteristics are not influenced by isometric ontogeny. As the first biomechanical modelling of atympanic ear and among the few non-human ear modelling, this study provides a methodological framework for further investigations into hearing mechanisms and the hearing evolution of vertebrates.
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Affiliation(s)
- Jordi Marcé-Nogué
- Department of Mechanical Engineering, Universitat Rovira i Virgili Tarragona, 43007 Tarragona, Catalonia, Spain
- Institut Català de Paleontologia, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain
| | - Juan Liu
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA
- University of California Museum of Paleontology, University of California, Berkeley, Berkeley, CA 94720, USA
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3
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Lau IH, Vasconcelos RO. Noise-induced damage in the zebrafish inner ear endorgans: evidence for higher acoustic sensitivity of saccular and lagenar hair cells. J Exp Biol 2023; 226:jeb245992. [PMID: 37767687 DOI: 10.1242/jeb.245992] [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: 04/24/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023]
Abstract
The three otolithic endorgans of the inner ear are known to be involved in sound detection in different teleost fishes, yet their relative roles for auditory-vestibular functions within the same species remain uncertain. In zebrafish (Danio rerio), the saccule and utricle are thought to play key functions in encoding auditory and vestibular information, respectively, but the biological function of the lagena is not clear. We hypothesized that the zebrafish saccule serves as a primary auditory endorgan, making it more vulnerable to noise exposure, and that the lagena might have an auditory function given its connectivity to the saccule and the dominant vestibular function of the utricle. We compared the impact of acoustic trauma (continuous white noise at 168 dB for 24 h) between the sensory epithelia of the three otolithic endorgans. Noise treatment caused hair cell loss in both the saccule and lagena but not in the utricle. This effect was identified immediately after acoustic treatment and did not increase 24 h post-trauma. Furthermore, hair cell loss was accompanied by a reduction in presynaptic activity measured based on ribeye b presence, but mainly in the saccule, supporting its main contribution for noise-induced hearing loss. Our findings support the hypothesis that the saccule plays a major role in sound detection and that the lagena is also acoustically affected, extending the species hearing dynamic range.
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Affiliation(s)
- Ieng Hou Lau
- Institute of Science and Environment, University of Saint Joseph, Macao, S.A.R., China
| | - Raquel O Vasconcelos
- Institute of Science and Environment, University of Saint Joseph, Macao, S.A.R., China
- MARE - Marine and Environmental Sciences Centre/ARNET - Aquatic Research Network, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisbon, Portugal
- EPCV-Department of Life Sciences, Lusófona University, 1749-024 Lisbon, Portugal
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4
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Smith ET, Sun P, Yu SK, Raible DW, Nicolson T. Differential expression of mechanotransduction complex genes in auditory/vestibular hair cells in zebrafish. Front Mol Neurosci 2023; 16:1274822. [PMID: 38035267 PMCID: PMC10682102 DOI: 10.3389/fnmol.2023.1274822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 10/23/2023] [Indexed: 12/02/2023] Open
Abstract
Ciliated sensory cells such as photo- and olfactory receptors employ multiple types of opsins or hundreds of unique olfactory G-protein coupled receptors to respond to various wavelengths of light or odorants. With respect to hearing and balance, the mechanotransduction machinery involves fewer variants; however, emerging evidence suggests that specialization occurs at the molecular level. To address how the mechanotransduction complex varies in the inner ear, we characterized the expression of paralogous genes that encode components required for mechanotransduction in zebrafish hair cells using RNA-FISH and bioinformatic analysis. Our data indicate striking zonal differences in the expression of two components of the mechanotransduction complex which are known to physically interact, the transmembrane channel-like 1 and 2 (tmc1/2) family members and the calcium and integrin binding 2 and 3 (cib2/3) paralogues. tmc1, tmc2b, and cib3 are largely expressed in peripheral or extrastriolar hair cells, whereas tmc2a and cib2 are enriched in central or striolar hair cells. In addition, a gene implicated in deaf-blindness, ush1c, is highly enriched in a subset of extrastriolar hair cells. These results indicate that specific combinations of these components may optimize responses to mechanical stimuli in subtypes of sensory receptors within the inner ear.
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Affiliation(s)
- Eliot T. Smith
- Department of Otolaryngology-HNS, Stanford University, Stanford, CA, United States
| | - Peng Sun
- Department of Otolaryngology-HNS, Stanford University, Stanford, CA, United States
| | - Shengyang Kevin Yu
- Department of Otolaryngology-HNS and Biological Structure, Viginia Merrill Bloedel Hearing Research Center, University of Washington, Seattle, WA, United States
| | - David W. Raible
- Department of Otolaryngology-HNS and Biological Structure, Viginia Merrill Bloedel Hearing Research Center, University of Washington, Seattle, WA, United States
| | - Teresa Nicolson
- Department of Otolaryngology-HNS, Stanford University, Stanford, CA, United States
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5
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Sauer DJ, Yopak KE, Radford CA. Interspecific Variation in the Inner Ear Maculae of Sharks. Integr Org Biol 2023; 5:obad031. [PMID: 37732173 PMCID: PMC10506894 DOI: 10.1093/iob/obad031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 07/24/2023] [Accepted: 08/24/2023] [Indexed: 09/22/2023] Open
Abstract
There is well-documented diversity in the organization of inner ear hair cells in fishes; this variation is thought to reflect the differing functional requirements of species across a range of ecological niches. However, relatively little is known about interspecific variation (and its potential ecological implications) in the number and density of inner ear hair cells in elasmobranchs (sharks, skates, and rays). In this study, we quantified inner ear hair cells in the saccule, lagena, utricle, and macula neglecta of 9 taxonomically and ecologically distinct shark species. Using phylogenetically informed comparative approaches, sharks that feed in the water column had significantly greater hair cell density and total number of hair cells in the lagena and macula neglecta (i.e., vertically oriented maculae) compared to species that feed primarily on the seafloor. In addition, sharks within Carcharhinidae seemingly possess a specialized macula neglecta compared to other shark species. Overall, findings suggest that, similar to bony fishes, there is considerable variation in hair cell organization of shark inner ears, which may be tied to variation in ecology and/or specialized behaviors between different species.
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Affiliation(s)
- Derek J Sauer
- Leigh Marine Laboratory, Institute of Marine Science, University of Auckland, Leigh 0985, New Zealand
| | - Kara E Yopak
- Department of Biology and Marine Biology and the Center for Marine Science, University of North Carolina Wilmington, Wilmington, NC 28409, USA
| | - Craig A Radford
- Leigh Marine Laboratory, Institute of Marine Science, University of Auckland, Leigh 0985, New Zealand
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6
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Sauer DJ, Radford CA, Mull CG, Yopak KE. Quantitative assessment of inner ear variation in elasmobranchs. Sci Rep 2023; 13:11939. [PMID: 37488259 PMCID: PMC10366120 DOI: 10.1038/s41598-023-39151-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 07/20/2023] [Indexed: 07/26/2023] Open
Abstract
Considerable diversity has been documented in most sensory systems of elasmobranchs (sharks, rays, and skates); however, relatively little is known about morphological variation in the auditory system of these fishes. Using magnetic resonance imaging (MRI), the inner ear structures of 26 elasmobranchs were assessed in situ. The inner ear end organs (saccule, lagena, utricle, and macula neglecta), semi-circular canals (horizontal, anterior, and posterior), and endolymphatic duct were compared using phylogenetically-informed, multivariate analyses. Inner ear variation can be characterised by three primary axes that are influenced by diet and habitat, where piscivorous elasmobranchs have larger inner ears compared to non-piscivorous species, and reef-associated species have larger inner ears than oceanic species. Importantly, this variation may reflect differences in auditory specialisation that could be tied to the functional requirements and environmental soundscapes of different species.
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Affiliation(s)
- Derek J Sauer
- Leigh Marine Laboratory, Institute of Marine Science, University of Auckland, Leigh, New Zealand.
| | - Craig A Radford
- Leigh Marine Laboratory, Institute of Marine Science, University of Auckland, Leigh, New Zealand
| | - Christopher G Mull
- Integrated Fisheries Laboratory, Department of Biology, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | - Kara E Yopak
- Department of Biology and Marine Biology and the Center for Marine Science, University of North Carolina Wilmington, Wilmington, NC, USA
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7
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Cheng HL, Lee SC, Chang-Chien J, Su TR, Yang JJ, Su CC. Protective mechanism of ferulic acid against neomycin-induced ototoxicity in zebrafish. ENVIRONMENTAL TOXICOLOGY 2023; 38:604-614. [PMID: 36367326 DOI: 10.1002/tox.23707] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/27/2022] [Accepted: 10/28/2022] [Indexed: 06/16/2023]
Abstract
Ototoxicity refers to damage of sensory hair cells and functional hearing impairment following aminoglycosides exposure. Previously, we have determined that ferulic acid (FA) protected hair cells against serial concentrations of neomycin-induced ototoxic damage. The aim of the present study is to assess the mechanism and effects of FA on neomycin-induced hair cells loss and impact on mechanosensory-mediated behaviors alteration using transgenic zebrafish (pvalb3b: TagGFP). We first identified the optimal protective condition as pre/co-treatment method in early fish development. Pretreatment of the larvae with FA significantly protected against neomycin-induced hair cells loss through preventing neomycin passed through the cytoplasm of hair cells, and subsequently decreased reactive oxygen species production and TUNEL signals in 4 day post-fertilization (dpf) transgenic zebrafish larvae. Moreover, preservation of functional hair cells correlated directly with rescue of the altered swimming behavior, indicates FA pretreatment protects against neomycin ototoxic damage in 7-dpf transgenic zebrafish larvae. Together, our findings unravel the otoprotective role of FA as an effective agent against neomycin-induced ototoxic effects and offering the theoretical foundation for discovering novel candidates for hearing protection.
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Affiliation(s)
- Hsin-Lin Cheng
- Department of Biomedical Sciences, Chung Shan Medical University, Taichung, Taiwan
- Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Shan-Chih Lee
- Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan
- Department of Medical Imaging and Radiological Sciences, Chung Shan Medical University, Taichung, Taiwan
| | - Ju Chang-Chien
- Department of Biomedical Sciences, Chung Shan Medical University, Taichung, Taiwan
| | - Tzu-Rong Su
- Dean chamber, Antai Medical Care Corporation Antai Tian-Sheng Memorial Hospital, Pingtung, Taiwan
- Department of Beauty Science, Meiho University, Pingtung, Taiwan
| | - Jiann-Jou Yang
- Department of Biomedical Sciences, Chung Shan Medical University, Taichung, Taiwan
- Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Ching-Chyuan Su
- Dean chamber, Antai Medical Care Corporation Antai Tian-Sheng Memorial Hospital, Pingtung, Taiwan
- Department of Beauty Science, Meiho University, Pingtung, Taiwan
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8
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Hu Y, Majoris JE, Buston PM, Webb JF. Ear Development in Select Coral Reef Fishes: Clues for the Role of Hearing in Larval Orientation Behavior? ICHTHYOLOGY & HERPETOLOGY 2022. [DOI: 10.1643/i2022029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yinan Hu
- Department of Biological Sciences, University of Rhode Island, Kingston, Rhode Island 02881
| | - John E. Majoris
- Department of Biology, Boston University, Boston, Massachusetts 02215; Present address: University of Texas at Austin, Marine Science Institute, Port Aransas, Texas 78373;
| | - Peter M. Buston
- Department of Biology, Boston University, Boston, Massachusetts 02215;
| | - Jacqueline F. Webb
- Department of Biological Sciences, University of Rhode Island, Kingston, Rhode Island 02881
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9
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Sauer DJ, Yopak KE, Radford CA. Ontogenetic development of inner ear hair cell organization in the New Zealand carpet shark Cephaloscyllium isabellum. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.1034891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
IntroductionThe inner ear hair cells of fishes can provide insight into the early evolution of vertebrate inner ear structure. Fishes represent some of the first vertebrates to evolve auditory capacity, and the same basic structure, the sensory hair cell, provides the fundament for auditory and vestibular function in jawed vertebrates. Despite holding critical basal position in the evolutionary tree of gnathostomes, relatively little is known about inner ear hair cells in elasmobranchs. Specifically, the extent of plasticity in hair cell organization throughout ontogeny among different sensory epithelia and the degree of variation between species is unknown.MethodsIn this study, we characterized the inner ear hair cells of the New Zealand carpet shark Cephaloscyllium isabellum throughout ontogeny by quantifying macular area, number of hair cells, hair cell density, and hair cell orientations in the inner ear maculae from a range of body sizes.ResultsSimilar to other elasmobranchs and bony fishes, macular area and the number of hair cells increased throughout ontogeny in the otolith organs. The orientations of hair cells within each maculae also was consistent with the limited data on other elasmobranchs. However, contrary to expectation, the macula neglecta did not increase in area or hair cell number throughout ontogeny, and hair cell density did not change with body size in any maculae.DiscussionThese findings suggest there may be variation between elasmobranch species in ontogenetic development of hair cell organization that may be related to hearing capabilities throughout life.
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10
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Ontogeny of the inner ear maculae in school sharks (Galeorhinus galeus). Hear Res 2022; 424:108600. [DOI: 10.1016/j.heares.2022.108600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 08/17/2022] [Accepted: 08/29/2022] [Indexed: 11/19/2022]
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11
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Popper AN, Sisneros JA. The Sound World of Zebrafish: A Critical Review of Hearing Assessment. Zebrafish 2022; 19:37-48. [PMID: 35439045 DOI: 10.1089/zeb.2021.0063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Zebrafish, like all fish species, use sound to learn about their environment. Thus, human-generated (anthropogenic) sound added to the environment has the potential to disrupt the detection of biologically relevant sounds, alter behavior, impact fitness, and produce stress and other effects that can alter the well-being of animals. This review considers the bioacoustics of zebrafish in the laboratory with two goals. First, we discuss zebrafish hearing and the problems and issues that must be considered in any studies to get a clear understanding of hearing capabilities. Second, we focus on the potential effects of sounds in the tank environment and its impact on zebrafish physiology and health. To do this, we discuss underwater acoustics and the very specialized acoustics of fish tanks, in which zebrafish live and are studied. We consider what is known about zebrafish hearing and what is known about the potential impacts of tank acoustics on zebrafish and their well-being. We conclude with suggestions regarding the major gaps in what is known about zebrafish hearing as well as questions that must be explored to better understand how well zebrafish tolerate and deal with the acoustic world they live in within laboratories.
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Affiliation(s)
- Arthur N Popper
- Department of Biology, University of Maryland, College Park, Maryland, USA
| | - Joseph A Sisneros
- Department of Psychology, University of Washington, Seattle, Washington, USA
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12
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Khara LS, Amin MR, Ali DW. Inhibiting the endocannabinoid degrading enzymes FAAH and MAGL during zebrafish embryogenesis alters sensorimotor function. J Exp Biol 2022; 225:275080. [PMID: 35438163 DOI: 10.1242/jeb.244146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 04/07/2022] [Indexed: 11/20/2022]
Abstract
The endocannabinoid system (eCS) plays a critical role in a variety of homeostatic and developmental processes. Although the eCS is known to be involved in motor and sensory function, the role of endocannabinoid (eCB) signaling in sensorimotor development remains to be fully understood. In this study, the catabolic enzymes fatty acid amide hydrolase (FAAH), and monoacylglycerol lipase (MAGL) were inhibited either simultaneously, or individually during the first ∼24 hours of zebrafish embryogenesis, and the properties of contractile events and escape responses were studied in animals ranging in age from 1 day post fertilization (dpf) to 10 weeks. This perturbation of the eCS resulted in alterations to contractile activity at 1 dpf. Inhibition of MAGL using JZL 184 and dual inhibition of FAAH/MAGL using JZL 195 decreased escape swimming activity at 2 dpf. Treatment with JZL 195 also produced alterations in the properties of the 2 dpf short latency C-start escape response. Animals treated with JZL 195 exhibited deficits in escape responses elicited by auditory/vibrational (A/V) stimuli at 5 and 6 dpf. These deficits were also present during the juvenile developmental stage (8-10-week-old fish), demonstrating a prolonged impact to sensory systems. These findings demonstrate that eCS perturbation affects sensorimotor function, and underscores the importance of eCB signaling in the development of motor and sensory processes.
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Affiliation(s)
- Lakhan S Khara
- Departments of Biological Sciences, CW-405 Biological Sciences Building, University of Alberta Edmonton, Alberta T6G 2E9, Canada
| | - Md Ruhul Amin
- Pharmacology, CW-405 Biological Sciences Building, University of Alberta Edmonton, Alberta T6G 2E9, Canada
| | - Declan W Ali
- Departments of Biological Sciences, CW-405 Biological Sciences Building, University of Alberta Edmonton, Alberta T6G 2E9, Canada.,Physiology, CW-405 Biological Sciences Building, University of Alberta Edmonton, Alberta T6G 2E9, Canada.,Neuroscience and Mental Health Institute. CW-405 Biological Sciences Building, University of Alberta Edmonton, Alberta T6G 2E9, Canada
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13
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Lara RA, Breitzler L, Lau IH, Gordillo-Martinez F, Chen F, Fonseca PJ, Bass AH, Vasconcelos RO. Noise-induced hearing loss correlates with inner ear hair cell decrease in larval zebrafish. J Exp Biol 2022; 225:274643. [PMID: 35258623 DOI: 10.1242/jeb.243743] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 02/27/2022] [Indexed: 11/20/2022]
Abstract
Anthropogenic noise can be hazardous for the auditory system and wellbeing of animals, including humans. However, very limited information is known on how this global environmental pollutant affects auditory function and inner ear sensory receptors in early ontogeny. The zebrafish (Danio rerio) is a valuable model in hearing research, including to investigate developmental processes of the vertebrate inner ear. We tested the effects of chronic exposure to white noise in larval zebrafish on inner ear saccular sensitivity and morphology at 3 and 5 days post fertilization (dpf), as well as on auditory-evoked swimming responses using the prepulse inhibition paradigm (PPI) at 5 dpf. Noise-exposed larvae showed significant increase in microphonic potential thresholds at low frequencies, 100 and 200 Hz, while PPI revealed a hypersensitisation effect and similar threshold shift at 200 Hz. Auditory sensitivity changes were accompanied by a decrease in saccular hair cell number and epithelium area. In aggregate, the results reveal noise-induced effects on inner ear structure-function in a larval fish paralleled by a decrease in auditory-evoked sensorimotor responses. More broadly, this study highlights the importance of investigating the impact of environmental noise on early development of sensory and behavioural responsiveness to acoustic stimuli.
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Affiliation(s)
- Rafael A Lara
- Institute of Science and Environment, University of Saint Joseph, Macao S.A.R., China.,Departamento de Biología, Universidad de Sevilla, Spain
| | - Lukas Breitzler
- Institute of Science and Environment, University of Saint Joseph, Macao S.A.R., China
| | - Ieng Hou Lau
- Institute of Science and Environment, University of Saint Joseph, Macao S.A.R., China
| | | | - Fangyi Chen
- Department of Biomedical Engineering, South University of Science and Technology of China, Guangdong, China
| | - Paulo J Fonseca
- Departamento de Biologia Animal and cE3c - Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
| | - Andrew H Bass
- Department of Neurobiology and Behavior, Cornell University, NY, USA
| | - Raquel O Vasconcelos
- Institute of Science and Environment, University of Saint Joseph, Macao S.A.R., China
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14
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Chen Z, Zhu S, Kindig K, Wang S, Chou SW, Davis RW, Dercoli MR, Weaver H, Stepanyan R, McDermott BM. Tmc proteins are essential for zebrafish hearing where Tmc1 is not obligatory. Hum Mol Genet 2021; 29:2004-2021. [PMID: 32167554 DOI: 10.1093/hmg/ddaa045] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 02/13/2020] [Indexed: 12/19/2022] Open
Abstract
Perception of sound is initiated by mechanically gated ion channels at the tips of stereocilia. Mature mammalian auditory hair cells require transmembrane channel-like 1 (TMC1) for mechanotransduction, and mutations of the cognate genetic sequences result in dominant or recessive heritable deafness forms in humans and mice. In contrast, zebrafish lateral line hair cells, which detect water motion, require Tmc2a and Tmc2b. Here, we use standard and multiplex genome editing in conjunction with functional and behavioral assays to determine the reliance of zebrafish hearing and vestibular organs on Tmc proteins. Surprisingly, our approach using multiple mutant alleles demonstrates that hearing in zebrafish is not dependent on Tmc1, nor is it fully dependent on Tmc2a and Tmc2b. Hearing however is absent in triple-mutant zebrafish that lack Tmc1, Tmc2a and Tmc2b. These outcomes reveal a striking resemblance of Tmc protein reliance in the vestibular sensory epithelia of mammals to the maculae of zebrafish. Moreover, our findings disclose a logic of Tmc use where hearing depends on a complement of Tmc proteins beyond those employed to sense water motion.
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Affiliation(s)
- Zongwei Chen
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Shaoyuan Zhu
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Kayla Kindig
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Shengxuan Wang
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Shih-Wei Chou
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Robin Woods Davis
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Michael R Dercoli
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Hannah Weaver
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Ruben Stepanyan
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.,Department of Neurosciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Brian M McDermott
- Department of Otolaryngology-Head and Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.,Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA.,Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.,Department of Neurosciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
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15
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Lozier NR, Sisneros JA. Ontogeny of Inner Ear Saccular Development in the Plainfin Midshipman (Porichthys notatus). BRAIN, BEHAVIOR AND EVOLUTION 2021; 95:330-340. [PMID: 34161950 PMCID: PMC10494869 DOI: 10.1159/000516477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 04/11/2021] [Indexed: 11/19/2022]
Abstract
The auditory system of the plainfin midshipman fish (Porichthys notatus) is an important sensory system used to detect and encode biologically relevant acoustic stimuli important for survival and reproduction including social acoustic signals used for intraspecific communication. Previous work showed that hair cell (HC) density in the midshipman saccule increased seasonally with reproductive state and was concurrent with enhanced auditory saccular sensitivity in both females and type I males. Although reproductive state-dependent changes in HC density have been well characterized in the adult midshipman saccule, less is known about how the saccule changes during ontogeny. Here, we examined the ontogenetic development of the saccule in four relative sizes of midshipman (larvae, small juveniles, large juveniles, and nonreproductive adults) to determine whether the density, total number, and orientation patterns of saccular HCs change during ontogeny. In addition, we also examined whether the total number of HCs in the saccule differ from that of the utricle and lagena in nonreproductive adults. We found that HC density varied across developmental stage. The ontogenetic reduction in HC density was concurrent with an ontogenetic increase in macula area. The orientation pattern of saccular HCs was similar to the standard pattern previously described in other teleost fishes, and this pattern of HC orientation was retained during ontogeny. Lastly, the estimated number of saccular HCs increased with developmental stage from the smallest larvae (2,336 HCs) to the largest nonreproductive adult (145,717 HCs), and in nonreproductive adults estimated HC numbers were highest in the saccule (mean ± SD = 28,479 ± 4,809 HCs), intermediate in the utricle (mean ± SD = 11,008 ± 1,619 HCs) and lowest in the lagena (mean ± SD = 4,560 ± 769 HCs).
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Affiliation(s)
- Nicholas R. Lozier
- Department of Psychology, University of Washington, Seattle, WA 98195-1525, USA
| | - Joseph A. Sisneros
- Department of Psychology, University of Washington, Seattle, WA 98195-1525, USA
- Department of Biology, University of Washington, Seattle, WA 98195-1800, USA
- Virginia Merrill Bloedel Hearing Research Center, University of Washington, WA 98195-7923, USA
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16
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Poulsen RE, Scholz LA, Constantin L, Favre-Bulle I, Vanwalleghem GC, Scott EK. Broad frequency sensitivity and complex neural coding in the larval zebrafish auditory system. Curr Biol 2021; 31:1977-1987.e4. [PMID: 33657408 PMCID: PMC8443405 DOI: 10.1016/j.cub.2021.01.103] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/16/2020] [Accepted: 01/28/2021] [Indexed: 02/02/2023]
Abstract
Most animals have complex auditory systems that identify salient features of the acoustic landscape to direct appropriate responses. In fish, these features include the volume, frequency, complexity, and temporal structure of acoustic stimuli transmitted through water. Larval fish have simple brains compared to adults but swim freely and depend on sophisticated sensory processing for survival.1-5 Zebrafish larvae, an important model for studying brain-wide neural networks, have thus far been found to possess a rudimentary auditory system, sensitive to a narrow range of frequencies and without evident sensitivity to acoustic features that are salient and ethologically important to adult fish.6,7 Here, we have combined a novel method for delivering water-borne sounds, a diverse assembly of acoustic stimuli, and whole-brain calcium imaging to describe the responses of individual auditory-responsive neurons across the brains of zebrafish larvae. Our results reveal responses to frequencies ranging from 100 Hz to 4 kHz, with evidence of frequency discrimination from 100 Hz to 2.5 kHz. Frequency-selective neurons are located in numerous regions of the brain, and neurons responsive to the same frequency are spatially grouped in some regions. Using functional clustering, we identified categories of neurons that are selective for a single pure-tone frequency, white noise, the sharp onset of acoustic stimuli, and stimuli involving a gradual crescendo. These results suggest a more nuanced auditory system than has previously been described in larval fish and provide insights into how a young animal's auditory system can both function acutely and serve as the scaffold for a more complex adult system.
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Affiliation(s)
- Rebecca E Poulsen
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Leandro A Scholz
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Lena Constantin
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Itia Favre-Bulle
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia; School of Mathematics and Physics, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Gilles C Vanwalleghem
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia.
| | - Ethan K Scott
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia.
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17
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Lara RA, Vasconcelos RO. Impact of noise on development, physiological stress and behavioural patterns in larval zebrafish. Sci Rep 2021; 11:6615. [PMID: 33758247 PMCID: PMC7988139 DOI: 10.1038/s41598-021-85296-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 02/26/2021] [Indexed: 01/31/2023] Open
Abstract
Noise pollution is increasingly present in aquatic ecosystems, causing detrimental effects on growth, physiology and behaviour of organisms. However, limited information exists on how this stressor affects animals in early ontogeny, a critical period for development and establishment of phenotypic traits. We tested the effects of chronic noise exposure to increasing levels (130 and 150 dB re 1 μPa, continuous white noise) and different temporal regimes on larval zebrafish (Danio rerio), an important vertebrate model in ecotoxicology. The acoustic treatments did not affect general development or hatching but higher noise levels led to increased mortality. The cardiac rate, yolk sac consumption and cortisol levels increased significantly with increasing noise level at both 3 and 5 dpf (days post fertilization). Variation in noise temporal patterns (different random noise periods to simulate shipping activity) suggested that the time regime is more important than the total duration of noise exposure to down-regulate physiological stress. Moreover, 5 dpf larvae exposed to 150 dB continuous noise displayed increased dark avoidance in anxiety-related dark/light preference test and impaired spontaneous alternation behaviour. We provide first evidence of noise-induced physiological stress and behavioural disturbance in larval zebrafish, showing that both noise amplitude and timing negatively impact key developmental endpoints in early ontogeny.
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Affiliation(s)
- Rafael A Lara
- Institute of Science and Environment, University of Saint Joseph, Macao S.A.R., China.
- Departamento de Biología, Universidad de Sevilla, Seville, Spain.
| | - Raquel O Vasconcelos
- Institute of Science and Environment, University of Saint Joseph, Macao S.A.R., China.
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18
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Favre-Bulle IA, Taylor MA, Marquez-Legorreta E, Vanwalleghem G, Poulsen RE, Rubinsztein-Dunlop H, Scott EK. Sound generation in zebrafish with Bio-Opto-Acoustics. Nat Commun 2020; 11:6120. [PMID: 33257652 PMCID: PMC7705743 DOI: 10.1038/s41467-020-19982-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 11/05/2020] [Indexed: 12/11/2022] Open
Abstract
Hearing is a crucial sense in underwater environments for communication, hunting, attracting mates, and detecting predators. However, the tools currently used to study hearing are limited, as they cannot controllably stimulate specific parts of the auditory system. To date, the contributions of hearing organs have been identified through lesion experiments that inactivate an organ, making it difficult to gauge the specific stimuli to which each organ is sensitive, or the ways in which inputs from multiple organs are combined during perception. Here, we introduce Bio-Opto-Acoustic (BOA) stimulation, using optical forces to generate localized vibrations in vivo, and demonstrate stimulation of the auditory system of zebrafish larvae with precise control. We use a rapidly oscillated optical trap to generate vibrations in individual otolith organs that are perceived as sound, while adjacent otoliths are either left unstimulated or similarly stimulated with a second optical laser trap. The resulting brain-wide neural activity is characterized using fluorescent calcium indicators, thus linking each otolith organ to its individual neuronal network in a way that would be impossible using traditional sound delivery methods. The results reveal integration and cooperation of the utricular and saccular otoliths, which were previously described as having separate biological functions, during hearing.
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Affiliation(s)
- Itia A Favre-Bulle
- School of Mathematics and Physics, The University of Queensland, Brisbane, Australia.
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia.
| | - Michael A Taylor
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Australia
| | | | - Gilles Vanwalleghem
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia
| | - Rebecca E Poulsen
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia
| | | | - Ethan K Scott
- Queensland Brain Institute, The University of Queensland, Brisbane, Australia.
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19
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Vetter BJ, Sisneros JA. Swim bladder enhances lagenar sensitivity to sound pressure and higher frequencies in female plainfin midshipman ( Porichthys notatus). J Exp Biol 2020; 223:jeb225177. [PMID: 32587068 PMCID: PMC7406320 DOI: 10.1242/jeb.225177] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 06/16/2020] [Indexed: 11/20/2022]
Abstract
The plainfin midshipman fish (Porichthys notatus) is an established model for investigating acoustic communication because the reproductive success of this species is dependent on the production and reception of social acoustic signals. Previous work showed that female midshipman have swim bladders with rostral horn-like extensions that project close to the saccule and lagena, while nesting (type I) males lack such rostral swim bladder extensions. The relative close proximity of the swim bladder to the lagena should increase auditory sensitivity to sound pressure and higher frequencies. Here, we test the hypothesis that the swim bladder of female midshipman enhances lagenar sensitivity to sound pressure and higher frequencies. Evoked potentials were recorded from auditory hair cell receptors in the lagena in reproductive females with intact (control condition) and removed (treated condition) swim bladders while pure tone stimuli (85-1005 Hz) were presented by an underwater speaker. Females with intact swim bladders had auditory thresholds 3-6 dB lower than females without swim bladders over a range of frequencies from 85 to 405 Hz. At frequencies from 545 to 1005 Hz, only females with intact swim bladders had measurable auditory thresholds (150-153 dB re. 1 µPa). The higher percentage of evoked lagenar potentials recorded in control females at frequencies >505 Hz indicates that the swim bladder extends the bandwidth of detectable frequencies. These findings reveal that the swim bladders in female midshipman can enhance lagenar sensitivity to sound pressure and higher frequencies, which may be important for the detection of behaviorally relevant social signals.
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Affiliation(s)
- Brooke J Vetter
- Department of Psychology, University of Washington, Seattle, WA 98195-1525, USA
| | - Joseph A Sisneros
- Department of Psychology, University of Washington, Seattle, WA 98195-1525, USA
- Department of Biology, University of Washington, Seattle, WA 98195-1800, USA
- Virginia Merrill Bloedel Hearing Research Center, University of Washington, Seattle, WA 98195-7923, USA
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20
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Disruption of tmc1/2a/2b Genes in Zebrafish Reveals Subunit Requirements in Subtypes of Inner Ear Hair Cells. J Neurosci 2020; 40:4457-4468. [PMID: 32371604 DOI: 10.1523/jneurosci.0163-20.2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 04/14/2020] [Accepted: 04/16/2020] [Indexed: 01/11/2023] Open
Abstract
Detection of sound and head movement requires mechanoelectrical transduction (MET) channels at tips of hair-cell stereocilia. In vertebrates, the transmembrane channel-like (TMC) proteins TMC1 and TMC2 fulfill critical roles in MET, and substantial evidence implicates these TMCs as subunits of the MET channel. To identify developmental and functional roles of this Tmc subfamily in the zebrafish inner ear, we tested the effects of truncating mutations in tmc1, tmc2a, and tmc2b on in vivo mechanosensation at the onset of hearing and balance, before gender differentiation. We find that tmc1/2a/2b triple-mutant larvae cannot detect sound or orient with respect to gravity. They lack acoustic-evoked behavioral responses, vestibular-induced eye movements, and hair-cell activity as assessed with FM dye labeling and microphonic potentials. Despite complete loss of hair-cell function, tmc triple-mutant larvae retain normal gross morphology of hair bundles and proper trafficking of known MET components Protocadherin 15a (Pcdh15a), Lipoma HMGIC fusion partner-like 5 (Lhfpl5), and Transmembrane inner ear protein (Tmie). Transgenic, hair cell-specific expression of Tmc2b-mEGFP rescues the behavioral and physiological deficits in tmc triple mutants. Results from tmc single and double mutants evince a principle role for Tmc2a and Tmc2b in hearing and balance, respectively, whereas Tmc1 has lower overall impact. Our experiments reveal that, in developing cristae, hair cells stratify into an upper, Tmc2a-dependent layer of teardrop-shaped cells and a lower, Tmc1/2b-dependent tier of gourd-shaped cells. Collectively, our genetic evidence indicates that auditory/vestibular end organs and subsets of hair cells therein rely on distinct combinations of Tmc1/2a/2b.SIGNIFICANCE STATEMENT We assessed the effects of tmc1/2a/2b truncation mutations on mechanoelectrical transduction (MET) in the inner-ear hair cells of larval zebrafish. tmc triple mutants lacked behavioral responses to sound and head movements, while further assays demonstrated no observable mechanosensitivity in the tmc1/2a/2b triple mutant inner ear. Examination of tmc double mutants revealed major contributions from Tmc2a and Tmc2b to macular function; however, Tmc1 had less overall impact. FM labeling of lateral cristae in tmc double mutants revealed the presence of two distinct cell types, an upper layer of teardrop-shaped cells that rely on Tmc2a, and a lower layer of gourd-shaped cells that rely on Tmc1/2b.
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21
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Bird NC, Richardson SS, Abels JR. Histological development and integration of the Zebrafish Weberian apparatus. Dev Dyn 2020; 249:998-1017. [DOI: 10.1002/dvdy.172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 03/18/2020] [Accepted: 03/23/2020] [Indexed: 12/18/2022] Open
Affiliation(s)
- Nathan C. Bird
- Department of Biology, McCollum Science Hall 107; University of Northern Iowa; Cedar Falls Iowa
| | - Selena S. Richardson
- Department of Biology, McCollum Science Hall 107; University of Northern Iowa; Cedar Falls Iowa
| | - Jeremy R. Abels
- Department of Biology, McCollum Science Hall 107; University of Northern Iowa; Cedar Falls Iowa
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22
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Han E, Ho Oh K, Park S, Chan Rah Y, Park HC, Koun S, Choi J. Analysis of behavioral changes in zebrafish (Danio rerio) larvae caused by aminoglycoside-induced damage to the lateral line and muscles. Neurotoxicology 2020; 78:134-142. [PMID: 32169463 DOI: 10.1016/j.neuro.2020.03.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 02/29/2020] [Accepted: 03/09/2020] [Indexed: 12/13/2022]
Abstract
Zebrafish behavior is influenced by the lateral line hair cells and muscles. Drug-induced behavioral changes can serve as indicators in the evaluation of drug toxicity. The aminoglycoside family of antibiotics comprise a number of agents, including neomycin (NM) and gentamicin (GM). We hypothesized that NM and GM exert different effects on zebrafish larvae through their action on the lateral line and muscle fibers, inducing different swimming behavioral patterns such as locomotor behavior and the startle response. In this study, 125 μM NM and 5, 10, 20 μM GM induced hair cell damage in the anterior and posterior lateral lines of zebrafish larvae. However, unlike GM, 125 μM NM also caused muscle damage. Locomotor behavior was decreased in the 125 μM NM-exposed group compared to the group exposed to GM. Furthermore, 125 μM NM exposure induced significantly different patterns of various indices of startle behavior compared with the GM exposure groups. Additionally, the larvae exhibited different startle responses depending on the concentration of GM. These results suggest that GM may be the drug-of-choice for analyzing behavioral changes in zebrafish caused by damage to the lateral line alone. Our study highlights the importance of confirming muscle damage in behavioral analyses using zebrafish.
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Affiliation(s)
- Eunjung Han
- Department of Otorhinolaryngology - Head and Neck Surgery, Korea University Ansan Hospital, Korea University, College of Medicine, Seoul, Republic of Korea; Laboratory of Neurodevelopmental Genetics, Graduate School of Medicine, Korea University, Seoul, Republic of Korea
| | - Kyoung Ho Oh
- Department of Otorhinolaryngology - Head and Neck Surgery, Korea University Ansan Hospital, Korea University, College of Medicine, Seoul, Republic of Korea; Korea University Zebrafish Translational Medical Research Center, Ansan, Republic of Korea
| | - Saemi Park
- Department of Otorhinolaryngology - Head and Neck Surgery, Korea University Ansan Hospital, Korea University, College of Medicine, Seoul, Republic of Korea
| | - Yoon Chan Rah
- Department of Otorhinolaryngology - Head and Neck Surgery, Korea University Ansan Hospital, Korea University, College of Medicine, Seoul, Republic of Korea
| | - Hae-Chul Park
- Laboratory of Neurodevelopmental Genetics, Graduate School of Medicine, Korea University, Seoul, Republic of Korea; Korea University Zebrafish Translational Medical Research Center, Ansan, Republic of Korea
| | - Soonil Koun
- Biomedical Research Center, Korea University Ansan Hospital, Ansan, Republic of Korea; Korea University Zebrafish Translational Medical Research Center, Ansan, Republic of Korea.
| | - June Choi
- Department of Otorhinolaryngology - Head and Neck Surgery, Korea University Ansan Hospital, Korea University, College of Medicine, Seoul, Republic of Korea; Korea University Zebrafish Translational Medical Research Center, Ansan, Republic of Korea.
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23
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Small fish, big prospects: using zebrafish to unravel the mechanisms of hereditary hearing loss. Hear Res 2020; 397:107906. [PMID: 32063424 DOI: 10.1016/j.heares.2020.107906] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 01/13/2020] [Accepted: 01/29/2020] [Indexed: 12/16/2022]
Abstract
Over the past decade, advancements in high-throughput sequencing have greatly enhanced our knowledge of the mutational signatures responsible for hereditary hearing loss. In its present state, the field has a largely uncensored view of protein coding changes in a growing number of genes that have been associated with hereditary hearing loss, and many more that have been proposed as candidate genes. Sequencing data can now be generated using methods that have become widespread and affordable. The greatest hurdles facing the field concern functional validation of uncharacterized genes and rapid application to human diseases, including hearing and balance disorders. To date, over 30 hearing-related disease models exist in zebrafish. New genome editing technologies, including CRISPR/Cas9 will accelerate the functional validation of hearing loss genes and variants in zebrafish. Here, we discuss current progress in the field and recent advances in genome editing approaches.
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24
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Erickson T, Pacentine IV, Venuto A, Clemens R, Nicolson T. The lhfpl5 Ohnologs lhfpl5a and lhfpl5b Are Required for Mechanotransduction in Distinct Populations of Sensory Hair Cells in Zebrafish. Front Mol Neurosci 2020; 12:320. [PMID: 32009898 PMCID: PMC6974483 DOI: 10.3389/fnmol.2019.00320] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 12/16/2019] [Indexed: 01/20/2023] Open
Abstract
Hair cells sense and transmit auditory, vestibular, and hydrodynamic information by converting mechanical stimuli into electrical signals. This process of mechano-electrical transduction (MET) requires a mechanically gated channel localized in the apical stereocilia of hair cells. In mice, lipoma HMGIC fusion partner-like 5 (LHFPL5) acts as an auxiliary subunit of the MET channel whose primary role is to correctly localize PCDH15 and TMC1 to the mechanotransduction complex. Zebrafish have two lhfpl5 genes (lhfpl5a and lhfpl5b), but their individual contributions to MET channel assembly and function have not been analyzed. Here we show that the zebrafish lhfpl5 genes are expressed in discrete populations of hair cells: lhfpl5a expression is restricted to auditory and vestibular hair cells in the inner ear, while lhfpl5b expression is specific to hair cells of the lateral line organ. Consequently, lhfpl5a mutants exhibit defects in auditory and vestibular function, while disruption of lhfpl5b affects hair cells only in the lateral line neuromasts. In contrast to previous reports in mice, localization of Tmc1 does not depend upon Lhfpl5 function in either the inner ear or lateral line organ. In both lhfpl5a and lhfpl5b mutants, GFP-tagged Tmc1 and Tmc2b proteins still localize to the stereocilia of hair cells. Using a stably integrated GFP-Lhfpl5a transgene, we show that the tip link cadherins Pcdh15a and Cdh23, along with the Myo7aa motor protein, are required for correct Lhfpl5a localization at the tips of stereocilia. Our work corroborates the evolutionarily conserved co-dependence between Lhfpl5 and Pcdh15, but also reveals novel requirements for Cdh23 and Myo7aa to correctly localize Lhfpl5a. In addition, our data suggest that targeting of Tmc1 and Tmc2b proteins to stereocilia in zebrafish hair cells occurs independently of Lhfpl5 proteins.
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Affiliation(s)
- Timothy Erickson
- Department of Biology, East Carolina University, Greenville, NC, United States.,Oregon Hearing Research Center and Vollum Institute, Oregon Health and Science University, Portland, OR, United States
| | - Itallia V Pacentine
- Oregon Hearing Research Center and Vollum Institute, Oregon Health and Science University, Portland, OR, United States
| | - Alexandra Venuto
- Department of Biology, East Carolina University, Greenville, NC, United States
| | - Rachel Clemens
- Oregon Hearing Research Center and Vollum Institute, Oregon Health and Science University, Portland, OR, United States
| | - Teresa Nicolson
- Oregon Hearing Research Center and Vollum Institute, Oregon Health and Science University, Portland, OR, United States
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25
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Yao Q, Wang L, Mittal R, Yan D, Richmond MT, Denyer S, Requena T, Liu K, Varshney GK, Lu Z, Liu XZ. Transcriptomic Analyses of Inner Ear Sensory Epithelia in Zebrafish. Anat Rec (Hoboken) 2019; 303:527-543. [PMID: 31883312 DOI: 10.1002/ar.24331] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 08/01/2019] [Accepted: 11/18/2019] [Indexed: 12/25/2022]
Abstract
Analysis of gene expression has the potential to assist in the understanding of multiple cellular processes including proliferation, cell-fate specification, senesence, and activity in both healthy and disease states. Zebrafish model has been increasingly used to understand the process of hearing and the development of the vertebrate auditory system. Within the zebrafish inner ear, there are three otolith organs, each containing a sensory macula of hair cells. The saccular macula is primarily involved in hearing, the utricular macula is primarily involved in balance and the function of the lagenar macula is not completely understood. The goal of this study is to understand the transcriptional differences in the sensory macula associated with different otolith organs with the intention of understanding the genetic mechanisms responsible for the distinct role each organ plays in sensory perception. The sensory maculae of the saccule, utricle, and lagena were dissected out of adult Et(krt4:GFP)sqet4 zebrafish expressing green fluorescent protein in hair cells for transcriptional analysis. The total RNAs of the maculae were isolated and analyzed by RNA GeneChip microarray. Several of the differentially expressed genes are known to be involved in deafness, otolith development and balance. Gene expression among these otolith organs was very well conserved with less than 10% of genes showing differential expression. Data from this study will help to elucidate which genes are involved in hearing and balance. Furthermore, the findings of this study will assist in the development of the zebrafish model for human hearing and balance disorders. Anat Rec, 303:527-543, 2020. © 2019 American Association for Anatomy.
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Affiliation(s)
- Qi Yao
- Department of Otolaryngology, Miller School of Medicine, University of Miami, Miami, Florida.,Department of Biology, University of Miami, Miami, Florida
| | - Lingyu Wang
- Department of Biology, University of Miami, Miami, Florida
| | - Rahul Mittal
- Department of Otolaryngology, Miller School of Medicine, University of Miami, Miami, Florida
| | - Denise Yan
- Department of Otolaryngology, Miller School of Medicine, University of Miami, Miami, Florida
| | | | - Steven Denyer
- Department of Biology, University of Miami, Miami, Florida
| | - Teresa Requena
- Genes & Human Disease Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - Kaili Liu
- Genes & Human Disease Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - Gaurav K Varshney
- Genes & Human Disease Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - Zhongmin Lu
- Department of Biology, University of Miami, Miami, Florida
| | - Xue Zhong Liu
- Department of Otolaryngology, Miller School of Medicine, University of Miami, Miami, Florida.,Department of Otolaryngology, Xiangya Hospital, Central South University, Changsha, Hunan, China
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26
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Cassar S, Adatto I, Freeman JL, Gamse JT, Iturria I, Lawrence C, Muriana A, Peterson RT, Van Cruchten S, Zon LI. Use of Zebrafish in Drug Discovery Toxicology. Chem Res Toxicol 2019; 33:95-118. [PMID: 31625720 DOI: 10.1021/acs.chemrestox.9b00335] [Citation(s) in RCA: 268] [Impact Index Per Article: 53.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Unpredicted human safety events in clinical trials for new drugs are costly in terms of human health and money. The drug discovery industry attempts to minimize those events with diligent preclinical safety testing. Current standard practices are good at preventing toxic compounds from being tested in the clinic; however, false negative preclinical toxicity results are still a reality. Continual improvement must be pursued in the preclinical realm. Higher-quality therapies can be brought forward with more information about potential toxicities and associated mechanisms. The zebrafish model is a bridge between in vitro assays and mammalian in vivo studies. This model is powerful in its breadth of application and tractability for research. In the past two decades, our understanding of disease biology and drug toxicity has grown significantly owing to thousands of studies on this tiny vertebrate. This Review summarizes challenges and strengths of the model, discusses the 3Rs value that it can deliver, highlights translatable and untranslatable biology, and brings together reports from recent studies with zebrafish focusing on new drug discovery toxicology.
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Affiliation(s)
- Steven Cassar
- Preclinical Safety , AbbVie , North Chicago , Illinois 60064 , United States
| | - Isaac Adatto
- Stem Cell and Regenerative Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Jennifer L Freeman
- School of Health Sciences , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Joshua T Gamse
- Drug Safety Evaluation , Bristol-Myers Squibb , New Brunswick , New Jersey 08901 , United States
| | | | - Christian Lawrence
- Aquatic Resources Program , Boston Children's Hospital , Boston , Massachusetts 02115 , United States
| | | | - Randall T Peterson
- Pharmacology and Toxicology, College of Pharmacy , University of Utah , Salt Lake City , Utah 84112 , United States
| | | | - Leonard I Zon
- Stem Cell Program and Division of Hematology/Oncology, Children's Hospital and Dana Farber Cancer Institute, Howard Hughes Medical Institute, Harvard Medical School, Harvard Stem Cell Institute, Stem Cell and Regenerative Biology Department , Harvard University , Boston , Massachusetts 02138 , United States
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27
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Zou B, Desmidt AA, Mittal R, Yan D, Richmond M, Tekin M, Liu XZ, Lu Z. The Generation of Zebrafish Mariner Model Using the CRISPR/Cas9 System. Anat Rec (Hoboken) 2019; 303:556-562. [PMID: 31260171 DOI: 10.1002/ar.24221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 09/21/2018] [Accepted: 10/12/2018] [Indexed: 12/15/2022]
Abstract
Targeted genome editing mediated by clustered, regularly interspaced, short palindromic repeat (CRISPR)/CRISPR-associated nuclease 9 (Cas9) technology has emerged as a powerful tool for gene function studies and has great potential for gene therapy. Although CRISPR/Cas9 has been widely used in many research fields, only a few successful zebrafish models have been established using this technology in hearing research. In this study, we successfully created zebrafish mariner mutants by targeting the motor head domain of Myo7aa using CRISPR/Cas9. The CRISPR/Cas9-generated mutants showed unbalanced swimming behavior and disorganized sterocilia of inner ear hair cells, which resemble the phenotype of the zebrafish mariner mutants. In addition, we found that CRISPR/Cas9-generated mutants have reduced number of stereociliary bundles of inner ear hair cells and have significant hearing loss. Furthermore, phenotypic analysis was performed on F0 larvae within the first week post fertilization, which dramatically shortens data collection period. Therefore, results of this study showed that CRISPR/Cas9 is a quick and effective method to generate zebrafish mutants as a model for studying human genetic deafness. Anat Rec, 303:556-562, 2020. © 2019 American Association for Anatomy.
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Affiliation(s)
- Bing Zou
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida.,Department of Biology, University of Miami, Miami, Florida
| | | | - Rahul Mittal
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida
| | - Denise Yan
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida
| | | | - Mustafa Tekin
- Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, Florida
| | - Xue Zhong Liu
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida.,Department of Otolaryngology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhongmin Lu
- Department of Biology, University of Miami, Miami, Florida.,Neuroscience Program, University of Miami, Miami, Florida.,International Center for Marine Studies, Shanghai Ocean University, Shanghai, China
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28
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DeSmidt AA, Zou B, Grati M, Yan D, Mittal R, Yao Q, Richmond MT, Denyer S, Liu XZ, Lu Z. Zebrafish Model for Nonsyndromic X-Linked Sensorineural Deafness, DFNX1. Anat Rec (Hoboken) 2019; 303:544-555. [PMID: 30874365 DOI: 10.1002/ar.24115] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 08/23/2018] [Accepted: 09/05/2018] [Indexed: 11/08/2022]
Abstract
Hereditary deafness is often a neurosensory disorder and affects the quality of life of humans. Only three X-linked genes (POU class 3 homeobox 4 (POU3F4), phosphoribosyl pyrophosphate synthetase 1 (PRPS1), and small muscle protein X-linked (SMPX)) are known to be involved in nonsyndromic hearing loss. Four PRPS1 missense mutations have been found to associate with X-linked nonsyndromic sensorineural deafness (DFNX1/DFN2) in humans. However, a causative relationship between PRPS1 mutations and hearing loss in humans has not been well studied in any animal model. Phosphoribosyl pyrophosphate synthetase 1 (PRS-I) is highly conserved in vertebrate taxa. In this study, we used the zebrafish as a model to investigate the auditory role of zebrafish orthologs (prps1a and prps1b) of the human PRPS1 gene with whole mount in situ hybridization, reverse transcription polymerase chain reaction, phenotypic screening, confocal imaging, and electrophysiological methods. We found that both prps1a and prps1b genes were expressed in the inner ear of zebrafish. Splice-blocking antisense morpholino oligonucleotides (MO1 and MO2) caused exon-2 skip and intron-2 retention of prps1a and exon-2 skip and intron-1 retention of prps1b to knock down functions of the genes, respectively. MO1 and MO2 morphants had smaller otic vesicles and otoliths, fewer inner ear hair cells, and lower microphonic response amplitude and sensitivity than control zebrafish. Therefore, knockdown of either prps1a or prps1b resulted in significant sensorineural hearing loss in zebrafish. We conclude that the prps1 genes are essential for hearing in zebrafish, which has the potential to help us understand the biology of human deafness DFNX1/DFN2. Anat Rec, 303:544-555, 2020. © 2019 American Association for Anatomy.
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Affiliation(s)
| | - Bing Zou
- Department of Biology, University of Miami, Coral Gables, Florida.,Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida
| | - M'hamed Grati
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida
| | - Denise Yan
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida
| | - Rahul Mittal
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida
| | - Qi Yao
- Department of Biology, University of Miami, Coral Gables, Florida.,Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida
| | | | - Steven Denyer
- Department of Biology, University of Miami, Coral Gables, Florida
| | - Xue Zhong Liu
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida.,Department of Otolaryngology, Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Zhongmin Lu
- Department of Biology, University of Miami, Coral Gables, Florida.,Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida.,Neuroscience Program, University of Miami, Miami, Florida.,International Center for Marine Studies, Shanghai Ocean University, Shanghai, People's Republic of China
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29
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Pacentine IV, Nicolson T. Subunits of the mechano-electrical transduction channel, Tmc1/2b, require Tmie to localize in zebrafish sensory hair cells. PLoS Genet 2019; 15:e1007635. [PMID: 30726219 PMCID: PMC6380590 DOI: 10.1371/journal.pgen.1007635] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 02/19/2019] [Accepted: 01/03/2019] [Indexed: 12/26/2022] Open
Abstract
Mutations in transmembrane inner ear (TMIE) cause deafness in humans; previous studies suggest involvement in the mechano-electrical transduction (MET) complex in sensory hair cells, but TMIE’s precise role is unclear. In tmie zebrafish mutants, we observed that GFP-tagged Tmc1 and Tmc2b, which are subunits of the MET channel, fail to target to the hair bundle. In contrast, overexpression of Tmie strongly enhances the targeting of Tmc1-GFP and Tmc2b-GFP to stereocilia. To identify the motifs of Tmie underlying the regulation of the Tmcs, we systematically deleted or replaced peptide segments. We then assessed localization and functional rescue of each mutated/chimeric form of Tmie in tmie mutants. We determined that the first putative helix was dispensable and identified a novel critical region of Tmie, the extracellular region and transmembrane domain, which is required for both mechanosensitivity and Tmc2b-GFP expression in bundles. Collectively, our results suggest that Tmie’s role in sensory hair cells is to target and stabilize Tmc channel subunits to the site of MET. Hair cells mediate hearing and balance through the activity of a mechanosensitive channel in the cell membrane. The transmembrane inner ear (TMIE) protein is an essential component of the protein complex that gates this so-called mechanotransduction channel. While it is known that loss of TMIE results in deafness, the function of TMIE within the complex is unclear. Using zebrafish as a deafness model, Pacentine and Nicolson demonstrate that Tmie is required for the localization of the channel subunits, transmembrane channel-like (Tmc) proteins Tmc1/2b. They then evaluate thirteen unique versions of Tmie, each containing mutations in different domains of Tmie. This analysis reveals that specific mutated versions of Tmie reduce hair cell activity, and that these same dysfunctional versions also cause reduced Tmc expression at the normal site of the channel. These findings link hair cell activity with the levels of Tmc in the bundle, reinforcing the notion that the Tmcs are the pore-forming subunits of the mechanotransduction channel. The authors conclude that Tmie, through distinct regions, is involved in both trafficking and stabilizing the channels at the site of mechanotransduction.
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Affiliation(s)
- Itallia V. Pacentine
- Oregon Hearing Research Center and Vollum Institute, Oregon Health & Science University, Portland, Oregon, United States of America
| | - Teresa Nicolson
- Oregon Hearing Research Center and Vollum Institute, Oregon Health & Science University, Portland, Oregon, United States of America
- * E-mail:
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30
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Pickett SB, Raible DW. Water Waves to Sound Waves: Using Zebrafish to Explore Hair Cell Biology. J Assoc Res Otolaryngol 2019; 20:1-19. [PMID: 30635804 DOI: 10.1007/s10162-018-00711-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 12/19/2018] [Indexed: 01/09/2023] Open
Abstract
Although perhaps best known for their use in developmental studies, over the last couple of decades, zebrafish have become increasingly popular model organisms for investigating auditory system function and disease. Like mammals, zebrafish possess inner ear mechanosensory hair cells required for hearing, as well as superficial hair cells of the lateral line sensory system, which mediate detection of directional water flow. Complementing mammalian studies, zebrafish have been used to gain significant insights into many facets of hair cell biology, including mechanotransduction and synaptic physiology as well as mechanisms of both hereditary and acquired hair cell dysfunction. Here, we provide an overview of this literature, highlighting some of the particular advantages of using zebrafish to investigate hearing and hearing loss.
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Affiliation(s)
- Sarah B Pickett
- Department of Biological Structure, University of Washington, Health Sciences Building H-501, 1959 NE Pacific Street, Box 357420, Seattle, WA, 98195-7420, USA
- Graduate Program in Neuroscience, University of Washington, 1959 NE Pacific Street, Box 357270, Seattle, WA, 98195-7270, USA
| | - David W Raible
- Department of Biological Structure, University of Washington, Health Sciences Building H-501, 1959 NE Pacific Street, Box 357420, Seattle, WA, 98195-7420, USA.
- Graduate Program in Neuroscience, University of Washington, 1959 NE Pacific Street, Box 357270, Seattle, WA, 98195-7270, USA.
- Virginia Merrill Bloedel Hearing Research Center, University of Washington, 1701 NE Columbia Rd, Box 357923, Seattle, WA, 98195-7923, USA.
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31
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Quinoxaline protects zebrafish lateral line hair cells from cisplatin and aminoglycosides damage. Sci Rep 2018; 8:15119. [PMID: 30310154 PMCID: PMC6181994 DOI: 10.1038/s41598-018-33520-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 10/01/2018] [Indexed: 01/13/2023] Open
Abstract
Hair cell (HC) death is the leading cause of hearing and balance disorders in humans. It can be triggered by multiple insults, including noise, aging, and treatment with certain therapeutic drugs. As society becomes more technologically advanced, the source of noise pollution and the use of drugs with ototoxic side effects are rapidly increasing, posing a threat to our hearing health. Although the underlying mechanism by which ototoxins affect auditory function varies, they share common intracellular byproducts, particularly generation of reactive oxygen species. Here, we described the therapeutic effect of the heterocyclic compound quinoxaline (Qx) against ototoxic insults in zebrafish HCs. Animals incubated with Qx were protected against the deleterious effects of cisplatin and gentamicin, and partially against neomycin. In the presence of Qx, there was a reduction in the number of TUNEL-positive HCs. Since Qx did not block the mechanotransduction channels, based on FM1-43 uptake and microphonic potentials, this implies that Qx’s otoprotective effect is at the intracellular level. Together, these results unravel a novel therapeutic role for Qx as an otoprotective drug against the deleterious side effects of cisplatin and aminoglycosides, offering an alternative option for patients treated with these compounds.
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32
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Schulz-Mirbach T, Ladich F, Plath M, Heß M. Enigmatic ear stones: what we know about the functional role and evolution of fish otoliths. Biol Rev Camb Philos Soc 2018; 94:457-482. [DOI: 10.1111/brv.12463] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 08/16/2018] [Accepted: 08/20/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Tanja Schulz-Mirbach
- Department Biology II, Zoology; Ludwig-Maximilians-University; Großhaderner Strasse 2, 82152 Planegg-Martinsried Germany
| | - Friedrich Ladich
- Department of Behavioural Biology; University of Vienna; Althanstrasse 14, 1090 Vienna Austria
| | - Martin Plath
- College of Animal Science & Technology; Northwest A&F University; 22 Xinong Road, Yangling Shaanxi China
| | - Martin Heß
- Department Biology II, Zoology; Ludwig-Maximilians-University; Großhaderner Strasse 2, 82152 Planegg-Martinsried Germany
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33
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Peimani AR, Zoidl G, Rezai P. A microfluidic device to study electrotaxis and dopaminergic system of zebrafish larvae. BIOMICROFLUIDICS 2018; 12:014113. [PMID: 29464011 PMCID: PMC5803004 DOI: 10.1063/1.5016381] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Accepted: 01/25/2018] [Indexed: 06/08/2023]
Abstract
The zebrafish is a lower vertebrate model organism offering multiple applications for both fundamental and biomedical research into the nervous system from genes to behaviour. Investigation of zebrafish larvae's movement in response to various stimuli, which involves the dopaminergic system, is of interest in the field of sensory-motor integration. Nevertheless, the conventional methods of movement screening in Petri dishes and multi-well plates are mostly qualitative, uncontrollable, and inaccurate in terms of stimulus delivery and response analysis. We recently presented a microfluidic device built as a versatile platform for fluid flow stimulation and high speed time-lapse imaging of rheotaxis behaviour of zebrafish larvae. Here, we describe for the first time that this microfluidic device can also be used to test zebrafish larvae's sense of the electric field and electrotaxis in a systemic manner. We further show that electrotaxis is correlated with the dopamine signalling pathway in a time of day dependent manner and by selectively involving the D2-like dopamine receptors. The primary outcomes of this research opens avenues to study the molecular and physiological basis of electrotaxis, the effects of known agonist and antagonist compounds on the dopaminergic system, and the screen of novel pharmacological tools in the context of neurodegenerative disorders. We propose that this microfluidic device has broad application potential, including the investigation of complex stimuli, biological pathways, behaviors, and brain disorders.
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Affiliation(s)
- Amir Reza Peimani
- Department of Mechanical Engineering, York University, Toronto, Ontario M3J 1P3, Canada
| | - Georg Zoidl
- Department of Biology, York University, Toronto, Ontario M3J 1P3, Canada
| | - Pouya Rezai
- Department of Mechanical Engineering, York University, Toronto, Ontario M3J 1P3, Canada
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34
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Chaves PP, Valdoria CM, Amorim MCP, Vasconcelos RO. Ontogenetic development of the inner ear saccule and utricle in the Lusitanian toadfish: Potential implications for auditory sensitivity. Hear Res 2017; 353:112-121. [DOI: 10.1016/j.heares.2017.06.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 06/01/2017] [Accepted: 06/13/2017] [Indexed: 10/19/2022]
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35
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Vanwalleghem G, Heap LA, Scott EK. A profile of auditory-responsive neurons in the larval zebrafish brain. J Comp Neurol 2017; 525:3031-3043. [DOI: 10.1002/cne.24258] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/26/2017] [Accepted: 05/29/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Gilles Vanwalleghem
- School of Biomedical Sciences; The University of Queensland; St Lucia QLD Australia
| | - Lucy A. Heap
- School of Biomedical Sciences; The University of Queensland; St Lucia QLD Australia
| | - Ethan K. Scott
- School of Biomedical Sciences; The University of Queensland; St Lucia QLD Australia
- The Queensland Brain Institute, The University of Queensland; St Lucia QLD Australia
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36
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Zamora LY, Miguel KC, Lu Z. The alcohol-sensitive period during early octavolateral organ development in zebrafish (Danio rerio). J Neurosci Res 2017; 95:1194-1203. [PMID: 28105691 DOI: 10.1002/jnr.24017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 11/30/2016] [Accepted: 12/19/2016] [Indexed: 12/15/2022]
Abstract
Fetal alcohol exposure can cause Fetal Alcohol Spectrum Disorders (FASD), completely preventable developmental disabilities characterized by permanent birth defects. However, specific gestational timing when developing organs are most sensitive to alcohol exposure is unclear. In this study, we examined the temporal effects of embryonic alcohol exposure on octavolateral organs in zebrafish (Danio rerio), including inner ears and lateral line neuromasts that function in hearing, balance, and hydrodynamic detection, respectively. To determine an alcohol-sensitive period in the first 24 hours post fertilization (hpf), Et(krt4:EGFP)sqet4 zebrafish that express green fluorescent protein in sensory hair cells were treated in 2% alcohol for 2, 3, and 5-hours. Octavolateral organs of control and alcohol-exposed larvae were examined at 3, 5, and 7 days post fertilization (dpf). Using confocal and light microscopy, we found that alcohol-exposed larvae had significantly smaller otic vesicles and saccular otoliths than control larvae at 3 dpf. Only alcohol-exposed larvae from 12-17 hpf had smaller otic vesicles at 5 dpf, smaller saccular otoliths at 7 dpf and fewer saccular hair cells, neuromasts and hair cells per neuromast at 3 dpf. In addition, auditory function was assessed by microphonic potential recordings from inner ear hair cells in response to 200-Hz stimulation. Hearing sensitivity was reduced for alcohol-exposed larvae from 7-12 and 12-17 hpf. Our results show that 12-17 hpf is an alcohol-sensitive time window when morphology and function of zebrafish octavolateral organs are most vulnerable to alcohol exposure. This study implies that embryonic alcohol exposure timing during early development can influence severity of hearing deficits. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Lilliann Y Zamora
- University of Miami, Department of Biology, Coral Gables, Florida.,University of Miami, Neuroscience Program, Miami, Florida
| | - Kayla C Miguel
- University of Miami, Neuroscience Program, Miami, Florida
| | - Zhongmin Lu
- University of Miami, Department of Biology, Coral Gables, Florida.,University of Miami, Neuroscience Program, Miami, Florida.,International Center for Marine Studies, Shanghai Ocean University, Shanghai, China
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37
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Hearing sensitivity differs between zebrafish lines used in auditory research. Hear Res 2016; 341:220-231. [PMID: 27646864 DOI: 10.1016/j.heares.2016.09.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 08/23/2016] [Accepted: 09/15/2016] [Indexed: 11/20/2022]
Abstract
Zebrafish are increasingly used in auditory studies, in part due to the development of several transgenic lines that express hair cell-specific fluorescent proteins. However, it is largely unknown how transgene expression influences auditory phenotype. We previously observed reduced auditory sensitivity in adult Brn3c:mGFP transgenic zebrafish, which express membrane-bound green fluorescent protein (GFP) in sensory hair cells. Here, we examine the auditory sensitivity of zebrafish from multiple transgenic and background strains. We recorded auditory evoked potentials in adult animals and observed significantly higher auditory thresholds in three lines that express hair cell-specific GFP. There was no obvious correlation between hair cell density and auditory thresholds, suggesting that reduced sensitivity was not due to a reduction in hair cell density. FM1-43 uptake was reduced in Brn3c:mGFP fish but not in other lines, suggesting that a mechanotransduction defect may be responsible for the auditory phenotype in Brn3c animals, but that alternate mechanisms underlie the increased AEP thresholds in other lines. We found reduced prepulse inhibition (a measure of auditory-evoked behavior) in larval Brn3c animals, suggesting that auditory defects develop early in this line. We also found significant differences in auditory sensitivity between adults of different background strains, akin to strain differences observed in mouse models of auditory function. Our results suggest that researchers should exercise caution when selecting an appropriate zebrafish transgenic or background strain for auditory studies.
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38
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Baxendale S, Whitfield TT. Methods to study the development, anatomy, and function of the zebrafish inner ear across the life course. Methods Cell Biol 2016; 134:165-209. [PMID: 27312494 DOI: 10.1016/bs.mcb.2016.02.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The inner ear is a remarkably intricate structure able to detect sound, motion, and gravity. During development of the zebrafish embryo, the ear undergoes dynamic morphogenesis from a simple epithelial vesicle into a complex labyrinth, consisting of three semicircular canals and three otolithic sensory organs, each with an array of differentiated cell types. This microcosm of biology has led to advances in understanding molecular and cellular changes in epithelial patterning and morphogenesis, through to mechanisms of mechanosensory transduction and the origins of reflexive behavior. In this chapter, we describe different methods to study the zebrafish ear, including high-speed imaging of otic cilia, confocal microscopy, and light-sheet fluorescent microscopy. Many dyes, antibodies, and transgenic lines for labeling the ear are available, and we provide a comprehensive review of these resources. The developing ear is amenable to genetic, chemical, and physical manipulations, including injection and transplantation. Chemical modulation of developmental signaling pathways has paved the way for zebrafish to be widely used in drug discovery. We describe two chemical screens with relevance to the ear: a fluorescent-based screen for compounds that protect against ototoxicity, and an in situ-based screen for modulators of a signaling pathway involved in semicircular canal development. We also describe methods for dissection and imaging of the adult otic epithelia. We review both manual and automated methods to test the function of the inner ear and lateral line, defects in which can lead to altered locomotor behavior. Finally, we review a collection of zebrafish models that are generating new insights into human deafness and vestibular disorders.
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Affiliation(s)
- S Baxendale
- University of Sheffield, Sheffield, United Kingdom
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39
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Yao Q, DeSmidt AA, Tekin M, Liu X, Lu Z. Hearing Assessment in Zebrafish During the First Week Postfertilization. Zebrafish 2016; 13:79-86. [PMID: 26982161 DOI: 10.1089/zeb.2015.1166] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The zebrafish (Danio rerio) is a valuable vertebrate model for human hearing disorders because of many advantages in genetics, embryology, and in vivo visualization. In this study, we investigated auditory function of zebrafish during the first week postfertilization using microphonic potential recording. Extracellular microphonic potentials were recorded from hair cells in the inner ear of wild-type AB and transgenic Et(krt4:GFP)(sqet4) zebrafish at 3, 5, and 7 days postfertilization in response to 20, 50, 100, 200, 300, and 400-Hz acoustic stimulation. We found that microphonic threshold significantly decreased with age in zebrafish. However, there was no significant difference of microphonic responses between wild-type and transgenic zebrafish, indicating that the transgenic zebrafish have normal hearing like wild-type zebrafish. In addition, we observed that microphonic threshold did not change with the recording electrode location. Furthermore, microphonic threshold increased significantly at all tested stimulus frequencies after displacement of the saccular otolith but only increased at low frequencies after displacement of the utricular otolith, showing that the saccule rather than the utricle plays the major role in larval zebrafish hearing. These results enhance our knowledge of early development of auditory function in zebrafish and the factors affecting hearing assessment with microphonic potential recording.
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Affiliation(s)
- Qi Yao
- 1 Department of Biology, University of Miami , Coral Gables, Florida
- 2 Department of Otolaryngology, University of Miami Miller School of Medicine , Miami, Florida
| | | | - Mustafa Tekin
- 2 Department of Otolaryngology, University of Miami Miller School of Medicine , Miami, Florida
- 3 Dr. John T. Macdonald Foundation Department of Human Genetics, John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine , Miami, Florida
| | - Xuezhong Liu
- 2 Department of Otolaryngology, University of Miami Miller School of Medicine , Miami, Florida
- 3 Dr. John T. Macdonald Foundation Department of Human Genetics, John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine , Miami, Florida
- 4 Department of Otolaryngology, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Zhongmin Lu
- 1 Department of Biology, University of Miami , Coral Gables, Florida
- 5 Neuroscience Program, University of Miami , Miami, Florida
- 6 International Center for Marine Studies, Shanghai Ocean University , Shanghai, People's Republic of China
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40
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Vasconcelos RO, Alderks PW, Sisneros JA. Development of Structure and Sensitivity of the Fish Inner Ear. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 877:291-318. [PMID: 26515320 DOI: 10.1007/978-3-319-21059-9_14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Fish represent the largest group of vertebrates and display the greatest diversity of auditory structures. However, studies addressing how the form and function of the auditory system change during development to enhance perception of the acoustic environment are rather sparse in this taxon compared to other vertebrate groups. An ontogenetic perspective of the auditory system in fishes provides a readily testable framework for understanding structure-function relationships. Additionally, studying ancestral models such as fish can convey valuable comparable information across vertebrates, as early developmental events are often evolutionary conserved. This chapter reviews the literature on the morphological development of the fish auditory system, with particular focus on the inner ear structures that evolve from an otic placode during early embryonic development and then continue to undergo differentiation and maturation in the postembryonic phase. Moreover, the chapter provides a systematic overview of how auditory sensitivity develops during ontogeny. Although most studies indicate a developmental improvement in auditory sensitivity, there is considerably species-specific variation. Lastly, the paucity of information and literature concerning the development of auditory capabilities for social communication in fishes is also discussed. Further investigation on the development of structure and function of the fish auditory system is recommended in order to obtain a deeper understanding of how ontogenetic morphological changes in the auditory pathway relate to modifications in acoustic reception, auditory processing, and the capacity to communicate acoustically.
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Affiliation(s)
- Raquel O Vasconcelos
- Institute of Science and Environment, University of Saint Joseph, Macau, S.A.R., China.
| | - Peter W Alderks
- Department of Psychology, University of Washington, Seattle, WA, 98195, USA
| | - Joseph A Sisneros
- Department of Psychology, University of Washington, Seattle, WA, 98195, USA.,Department of Biology, University of Washington, Seattle, WA, 98195, USA
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41
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Bhandiwad AA, Sisneros JA. Revisiting Psychoacoustic Methods for the Assessment of Fish Hearing. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 877:157-84. [PMID: 26515314 DOI: 10.1007/978-3-319-21059-9_8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Behavioral methods have been critical in the study of auditory perception and discrimination in fishes. In this chapter, we review some of the common methods used in fish psychoacoustics. We discuss associative methods, such as operant, avoidance, and classical conditioning, and their use in constructing audiograms, measuring frequency selectivity, and auditory stream segregation. We also discuss the measurement of innate behavioral responses, such as the acoustic startle response (ASR), prepulse inhibition (PPI), and phonotaxis, and their use in the assessment of fish hearing to determine auditory thresholds and in the testing of mechanisms for sound source localization. For each psychoacoustic method, we provide examples of their use and discuss the parameters and situations where such methods can be best utilized. In the case of the ASR, we show how this method can be used to construct and compare audiograms between two species of larval fishes, the three-spined stickleback (Gasterosteus aculeatus) and the zebrafish (Danio rerio). We also discuss considerations for experimental design with respect to stimulus presentation and threshold criteria and how these techniques can be used in future studies to investigate auditory perception in fishes.
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Affiliation(s)
- Ashwin A Bhandiwad
- Department of Psychology, University of Washington, Seattle, WA, 98103, USA.
| | - Joseph A Sisneros
- Department of Psychology, University of Washington, Seattle, WA, 98103, USA.,Department of Biology, University of Washington, Seattle, WA, 98103, USA
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Ontogenetic development of the auditory sensory organ in zebrafish (Danio rerio): changes in hearing sensitivity and related morphology. Sci Rep 2015; 5:15943. [PMID: 26526229 PMCID: PMC4630651 DOI: 10.1038/srep15943] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 09/29/2015] [Indexed: 11/08/2022] Open
Abstract
Zebrafish (Danio rerio) is an important model organism in hearing research. However, data on the hearing sensitivity of zebrafish vary across different reports. In the present study, the hearing sensitivity of zebrafish was examined by analysing the auditory evoked potentials (AEPs) over a range of total lengths (TLs) from 12 to 46 mm. Morphological changes in the hair cells (HCs) of the saccule (the main auditory end organ) and their synapses with primary auditory neurons were investigated. The AEPs were detected up to a much higher frequency limit (12 kHz) than previously reported. No significant difference in the frequency response range was observed across the TL range examined. However, the AEP thresholds demonstrated both developmental improvement and age-related loss of hearing sensitivity. The changes in hearing sensitivity were roughly consistent with the morphological changes in the saccule including (1) the number and density of HCs, (2) the organization of stereocilia, and (3) the quantity of a main ribbon protein, Ribeye b. The results of this study established a clear baseline for the hearing ability of zebrafish and revealed that the changes in the saccule contribute to the observed changes in TL (age)-related hearing sensitivity.
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Vasconcelos RO, Alderks PW, Ramos A, Fonseca PJ, Amorim MCP, Sisneros JA. Vocal differentiation parallels development of auditory saccular sensitivity in a highly soniferous fish. J Exp Biol 2015; 218:2864-72. [DOI: 10.1242/jeb.123059] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
ABSTRACT
Vocal differentiation is widely documented in birds and mammals but has been poorly investigated in other vertebrates, including fish, which represent the oldest extant vertebrate group. Neural circuitry controlling vocal behaviour is thought to have evolved from conserved brain areas that originated in fish, making this taxon key to understanding the evolution and development of the vertebrate vocal-auditory systems. This study examines ontogenetic changes in the vocal repertoire and whether vocal differentiation parallels auditory development in the Lusitanian toadfish Halobatrachus didactylus (Batrachoididae). This species exhibits a complex acoustic repertoire and is vocally active during early development. Vocalisations were recorded during social interactions for four size groups (fry: <2 cm; small juveniles: 2–4 cm; large juveniles: 5–7 cm; adults >25 cm, standard length). Auditory sensitivity of juveniles and adults was determined based on evoked potentials recorded from the inner ear saccule in response to pure tones of 75–945 Hz. We show an ontogenetic increment in the vocal repertoire from simple broadband-pulsed ‘grunts’ that later differentiate into four distinct vocalisations, including low-frequency amplitude-modulated ‘boatwhistles’. Whereas fry emitted mostly single grunts, large juveniles exhibited vocalisations similar to the adult vocal repertoire. Saccular sensitivity revealed a three-fold enhancement at most frequencies tested from small to large juveniles; however, large juveniles were similar in sensitivity to adults. We provide the first clear evidence of ontogenetic vocal differentiation in fish, as previously described for higher vertebrates. Our results suggest a parallel development between the vocal motor pathway and the peripheral auditory system for acoustic social communication in fish.
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Affiliation(s)
- Raquel O. Vasconcelos
- Institute of Science and Environment, University of Saint Joseph, Rua de Londres 16, Macau S.A.R., People's Republic of China
- Departamento de Biologia Animal and Centre for Ecology, Evolution and Environmental Changes (cE3c), Universidade de Lisboa, Bloco C2 Campo Grande, Lisbon 1749-016, Portugal
| | - Peter W. Alderks
- Departments of Psychology and Biology, University of Washington, Seattle, WA 98195, USA
| | - Andreia Ramos
- Institute of Science and Environment, University of Saint Joseph, Rua de Londres 16, Macau S.A.R., People's Republic of China
- Departamento de Biologia Animal and Centre for Ecology, Evolution and Environmental Changes (cE3c), Universidade de Lisboa, Bloco C2 Campo Grande, Lisbon 1749-016, Portugal
| | - Paulo J. Fonseca
- Departamento de Biologia Animal and Centre for Ecology, Evolution and Environmental Changes (cE3c), Universidade de Lisboa, Bloco C2 Campo Grande, Lisbon 1749-016, Portugal
| | - M. Clara P. Amorim
- MARE – Marine and Environmental Sciences Centre, Departamento de Biociências, ISPA – Instituto Universitário, Rua Jardim do Tabaco 34, Lisbon 1149-041, Portugal
| | - Joseph A. Sisneros
- Departments of Psychology and Biology, University of Washington, Seattle, WA 98195, USA
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Simmons AM. Representation of particle motion in the auditory midbrain of a developing anuran. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2015; 201:681-9. [PMID: 25981910 DOI: 10.1007/s00359-015-1015-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Revised: 04/29/2015] [Accepted: 05/05/2015] [Indexed: 11/29/2022]
Abstract
In bullfrog tadpoles, a "deaf period" of lessened responsiveness to the pressure component of sounds, evident during the end of the late larval period, has been identified in the auditory midbrain. But coding of underwater particle motion in the vestibular medulla remains stable over all of larval development, with no evidence of a "deaf period." Neural coding of particle motion in the auditory midbrain was assessed to determine if a "deaf period" for this mode of stimulation exists in this brain area in spite of its absence from the vestibular medulla. Recording sites throughout the developing laminar and medial principal nuclei show relatively stable thresholds to z-axis particle motion, up until the "deaf period." Thresholds then begin to increase from this point up through the rest of metamorphic climax, and significantly fewer responsive sites can be located. The representation of particle motion in the auditory midbrain is less robust during later compared to earlier larval stages, overlapping with but also extending beyond the restricted "deaf period" for pressure stimulation. The decreased functional representation of particle motion in the auditory midbrain throughout metamorphic climax may reflect ongoing neural reorganization required to mediate the transition from underwater to amphibious life.
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Affiliation(s)
- Andrea Megela Simmons
- Department of Cognitive, Linguistic and Psychological Sciences and Department of Neuroscience, Brown University, 1821, Providence, RI, 02912, USA,
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Grati M, Chakchouk I, Ma Q, Bensaid M, Desmidt A, Turki N, Yan D, Baanannou A, Mittal R, Driss N, Blanton S, Farooq A, Lu Z, Liu XZ, Masmoudi S. A missense mutation in DCDC2 causes human recessive deafness DFNB66, likely by interfering with sensory hair cell and supporting cell cilia length regulation. Hum Mol Genet 2015; 24:2482-91. [PMID: 25601850 DOI: 10.1093/hmg/ddv009] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 01/13/2015] [Indexed: 11/12/2022] Open
Abstract
Hearing loss is the most common sensory deficit in humans. We show that a point mutation in DCDC2 (DCDC2a), a member of doublecortin domain-containing protein superfamily, causes non-syndromic recessive deafness DFNB66 in a Tunisian family. Using immunofluorescence on rat inner ear neuroepithelia, DCDC2a was found to localize to the kinocilia of sensory hair cells and the primary cilia of nonsensory supporting cells. DCDC2a fluorescence is distributed along the length of the kinocilium with increased density toward the tip. DCDC2a-GFP overexpression in non-polarized COS7 cells induces the formation of long microtubule-based cytosolic cables suggesting a role in microtubule formation and stabilization. Deafness mutant DCDC2a expression in hair cells and supporting cells causes cilium structural defects, such as cilium branching, and up to a 3-fold increase in length ratios. In zebrafish, the ortholog dcdc2b was found to be essential for hair cell development, survival and function. Our results reveal DCDC2a to be a deafness gene and a player in hair cell kinocilia and supporting cell primary cilia length regulation likely via its role in microtubule formation and stabilization.
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Affiliation(s)
- M'hamed Grati
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Imen Chakchouk
- Laboratoire Procédés de Criblage Moléculaire et Cellulaire, Centre de Biotechnologie de Sfax, Université de Sfax, Sfax, Tunisie
| | - Qi Ma
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Mariem Bensaid
- Laboratoire Procédés de Criblage Moléculaire et Cellulaire, Centre de Biotechnologie de Sfax, Université de Sfax, Sfax, Tunisie
| | | | - Nouha Turki
- Service Otorhinolaryngologie, Hôpital Universitaire Mahdia, Mahdia, Tunisie
| | - Denise Yan
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Aissette Baanannou
- Laboratoire Procédés de Criblage Moléculaire et Cellulaire, Centre de Biotechnologie de Sfax, Université de Sfax, Sfax, Tunisie
| | - Rahul Mittal
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Nabil Driss
- Service Otorhinolaryngologie, Hôpital Universitaire Mahdia, Mahdia, Tunisie
| | - Susan Blanton
- Dr John T. Macdonald Foundation Department of Human Genetics, and John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL 33146, USA and
| | - Amjad Farooq
- Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Zhongmin Lu
- Department of Biology, University of Miami, Miami, FL 33146, USA
| | - Xue Zhong Liu
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA,
| | - Saber Masmoudi
- Laboratoire Procédés de Criblage Moléculaire et Cellulaire, Centre de Biotechnologie de Sfax, Université de Sfax, Sfax, Tunisie,
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Rohmann KN, Tripp JA, Genova RM, Bass AH. Manipulation of BK channel expression is sufficient to alter auditory hair cell thresholds in larval zebrafish. ACTA ACUST UNITED AC 2014; 217:2531-9. [PMID: 24803460 DOI: 10.1242/jeb.103093] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Non-mammalian vertebrates rely on electrical resonance for frequency tuning in auditory hair cells. A key component of the resonance exhibited by these cells is an outward calcium-activated potassium current that flows through large-conductance calcium-activated potassium (BK) channels. Previous work in midshipman fish (Porichthys notatus) has shown that BK expression correlates with seasonal changes in hearing sensitivity and that pharmacologically blocking these channels replicates the natural decreases in sensitivity during the winter non-reproductive season. To test the hypothesis that reducing BK channel function is sufficient to change auditory thresholds in fish, morpholino oligonucleotides (MOs) were used in larval zebrafish (Danio rerio) to alter expression of slo1a and slo1b, duplicate genes coding for the pore-forming α-subunits of BK channels. Following MO injection, microphonic potentials were recorded from the inner ear of larvae. Quantitative real-time PCR was then used to determine the MO effect on slo1a and slo1b expression in these same fish. Knockdown of either slo1a or slo1b resulted in disrupted gene expression and increased auditory thresholds across the same range of frequencies of natural auditory plasticity observed in midshipman. We conclude that interference with the normal expression of individual slo1 genes is sufficient to increase auditory thresholds in zebrafish larvae and that changes in BK channel expression are a direct mechanism for regulation of peripheral hearing sensitivity among fishes.
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Affiliation(s)
- Kevin N Rohmann
- Department of Neurobiology and Behavior, Cornell University, Ithaca, New York, NY 14853, USA
| | - Joel A Tripp
- Department of Neurobiology and Behavior, Cornell University, Ithaca, New York, NY 14853, USA
| | - Rachel M Genova
- Department of Neurobiology and Behavior, Cornell University, Ithaca, New York, NY 14853, USA
| | - Andrew H Bass
- Department of Neurobiology and Behavior, Cornell University, Ithaca, New York, NY 14853, USA
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Olt J, Johnson SL, Marcotti W. In vivo and in vitro biophysical properties of hair cells from the lateral line and inner ear of developing and adult zebrafish. J Physiol 2014; 592:2041-58. [PMID: 24566541 PMCID: PMC4027864 DOI: 10.1113/jphysiol.2013.265108] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Hair cells detect and process sound and movement information, and transmit this with remarkable precision and efficiency to afferent neurons via specialized ribbon synapses. The zebrafish is emerging as a powerful model for genetic analysis of hair cell development and function both in vitro and in vivo. However, the full exploitation of the zebrafish is currently limited by the difficulty in obtaining systematic electrophysiological recordings from hair cells under physiological recording conditions. Thus, the biophysical properties of developing and adult zebrafish hair cells are largely unknown. We investigated potassium and calcium currents, voltage responses and synaptic activity in hair cells from the lateral line and inner ear in vivo and using near-physiological in vitro recordings. We found that the basolateral current profile of hair cells from the lateral line becomes more segregated with age, and that cells positioned in the centre of the neuromast show more mature characteristics and those towards the edge retain a more immature phenotype. The proportion of mature-like hair cells within a given neuromast increased with zebrafish development. Hair cells from the inner ear showed a developmental change in current profile between the juvenile and adult stages. In lateral line hair cells from juvenile zebrafish, exocytosis also became more efficient and required less calcium for vesicle fusion. In hair cells from mature zebrafish, the biophysical characteristics of ion channels and exocytosis resembled those of hair cells from other lower vertebrates and, to some extent, those in the immature mammalian vestibular and auditory systems. We show that although the zebrafish provides a suitable animal model for studies on hair cell physiology, it is advisable to consider that the age at which the majority of hair cells acquire a mature-type configuration is reached only in the juvenile lateral line and in the inner ear from >2 months after hatching.
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Affiliation(s)
- Jennifer Olt
- Department of Biomedical Science, University of Sheffield, Sheffield, UK
| | - Stuart L Johnson
- Department of Biomedical Science, University of Sheffield, Sheffield, UK
| | - Walter Marcotti
- Department of Biomedical Science, University of Sheffield, Sheffield, UK
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