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Wang Y, Lyu J, Qian X, Chen B, Sun H, Luo W, Chi F, Li H, Ren D. Involvement of Dmp1 in the Precise Regulation of Hair Bundle Formation in the Developing Cochlea. BIOLOGY 2023; 12:biology12040625. [PMID: 37106825 PMCID: PMC10135853 DOI: 10.3390/biology12040625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/02/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023]
Abstract
Dentin matrix protein 1 (Dmp1) is a highly phosphorylated, extracellular matrix protein that is extensively expressed in bone and teeth but also found in soft tissues, including brain and muscle. However, the functions of Dmp1 in the mice cochlea are unknown. Our study showed that Dmp1 was expressed in auditory hair cells (HCs), with the role of Dmp1 in those cells identified using Dmp1 cKD mice. Immunostaining and scanning electron microscopy of the cochlea at P1 revealed that Dmp1 deficiency in mice resulted in an abnormal stereociliary bundle morphology and the mispositioning of the kinocilium. The following experiments further demonstrated that the cell-intrinsic polarity of HCs was affected without apparent effect on the tissue planer polarity, based on the observation that the asymmetric distribution of Vangl2 was unchanged whereas the Gαi3 expression domain was enlarged and Par6b expression was slightly altered. Then, the possible molecular mechanisms of Dmp1 involvement in inner ear development were explored via RNA-seq analysis. The study suggested that the Fgf23-Klotho endocrine axis may play a novel role in the inner ear and Dmp1 may regulate the kinocilium-stereocilia interaction via Fgf23-Klotho signaling. Together, our results proved the critical role of Dmp1 in the precise regulation of hair bundle morphogenesis in the early development of HCs.
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Affiliation(s)
- Yanmei Wang
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai 200031, China
| | - Jihan Lyu
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai 200031, China
| | - Xiaoqing Qian
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai 200031, China
| | - Binjun Chen
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai 200031, China
| | - Haojie Sun
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai 200031, China
| | - Wenwei Luo
- Department of Otolaryngology-Head and Neck Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
- The Second School of Clinical Medicine, South Medical University, Guangzhou 510080, China
| | - Fanglu Chi
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai 200031, China
| | - Hongzhe Li
- Research Service, VA Loma Linda Healthcare System, Loma Linda, CA 92350, USA
- Department of Otolaryngology-Head and Neck Surgery, Loma Linda University School of Medicine, Loma Linda, CA 92350, USA
| | - Dongdong Ren
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai 200031, China
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Han WW, Wu YQ, Fan ZY, Yang XY, Guan QF, Yan W, Lu XX, Liu XX, Zhou M, Li L, Liu JX. Characteristics of bone metabolism in postmenopausal female patients with different types of idiopathic benign paroxysmal positional vertigo: A single-centre retrospective study. Am J Otolaryngol 2021; 42:103149. [PMID: 34242882 DOI: 10.1016/j.amjoto.2021.103149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 06/17/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The association between benign paroxysmal positional vertigo (BPPV) and impaired calcium metabolism has attracted widespread interest. Several studies have suggested that decreased bone mineral density (BMD) and serum 25-hydroxyvitamin D (25(OH)D) level are related to the occurrence and/or recurrence of BPPV; however, the characteristics of bone metabolism in patients with BPPV subtypes have not been fully investigated, and conclusions have been controversial. This study aimed to evaluate BMD and serum levels of 25(OH)D and bone turnover markers to clarify the characteristics of bone metabolism in patients with different types of BPPV. METHOD We retrospectively analysed the data of new-onset idiopathic postmenopausal female patients with BPPV at our institution from January 2016 to January 2020. The patients' demographic data including age, medication history, concomitant diseases, onset time, clinical form, laboratory indicators, such as serum levels of 25(OH)D, bone formation markers, namely, amino-terminal propeptide of type I procollagen (PINP) and osteocalcin (OC), bone resorption marker, namely, β-isomerized carboxy-terminal telopeptide of type I collagen (β-CTX), and BMD were collected and analysed. RESULTS This study included 201 consecutive postmenopausal female patients with BPPV. Among them, 138 were diagnosed with posterior semicircular canal BPPV, 42 were diagnosed with lateral semicircular canal canalolithiasis, and 21 were diagnosed with lateral semicircular canal cupulolithiasis. There were no significant differences in age distribution, body mass index, clinical history, levels of albumin, globulin, uric acid, creatinine, or blood urea nitrogen, lipid profiles (except high-density lipoprotein cholesterol) and routine blood parameters among these groups (P > 0.05). There were no significant differences in the mean T-score and BMD values of different sites or in the serum levels of 25(OH)D and bone turnover markers (PINP, OC and β-CTX) among the subgroups (P > 0.05). The proportion of reduction in BMD (T-score < -1 SD) and decreased serum vitamin D level (< 20 ng/ml) were not significantly different between the subgroups (P > 0.05). CONCLUSION There were no significant differences in bone metabolism in postmenopausal female patients with different types of idiopathic BPPV.
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Affiliation(s)
- Wei-Wei Han
- Department of Rehabilitation, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China
| | - Yun-Qin Wu
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China
| | - Zhen-Yi Fan
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China
| | - Xiao-Yong Yang
- Department of Rehabilitation, Zhenhai Longsai Hospital, Ningbo, Zhejiang 315010, PR China
| | - Qiong-Feng Guan
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China
| | - Wang Yan
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China
| | - Xiao-Xiong Lu
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China
| | - Xiao-Xia Liu
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China
| | - Min Zhou
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China
| | - Li Li
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China
| | - Jian-Xun Liu
- Department of Rehabilitation, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, Zhejiang 315010, PR China.
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Gan W, Zhao C, Liu X, Bian C, Shi Q, You X, Song W. Whole-Genome Sequencing and Genome-Wide Studies of Spiny Head Croaker ( Collichthys lucidus) Reveals Potential Insights for Well-Developed Otoliths in the Family Sciaenidae. Front Genet 2021; 12:730255. [PMID: 34659355 PMCID: PMC8515026 DOI: 10.3389/fgene.2021.730255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 09/06/2021] [Indexed: 11/13/2022] Open
Abstract
Spiny head croaker (Collichthys lucidus), belonging to the family Sciaenidae, is a small economic fish with a main distribution in the coastal waters of Northwestern Pacific. Here, we constructed a nonredundant chromosome-level genome assembly of spiny head croaker and also made genome-wide investigations on genome evolution and gene families related to otolith development. A primary genome assembly of 811.23 Mb, with a contig N50 of 74.92 kb, was generated by a combination of 49.12-Gb Illumina clean reads and 35.24 Gb of PacBio long reads. Contigs of this draft assembly were further anchored into chromosomes by integration with additional 185.33-Gb Hi-C data, resulting in a high-quality chromosome-level genome assembly of 817.24 Mb, with an improved scaffold N50 of 26.58 Mb. Based on our phylogenetic analysis, we observed that C. lucidus is much closer to Larimichthys crocea than Miichthys miiuy. We also predicted that many gene families were significantly expanded (p-value <0.05) in spiny head croaker; among them, some are associated with "calcium signaling pathway" and potential "inner ear functions." In addition, we identified some otolith-related genes (such as otol1a that encodes Otolin-1a) with critical deletions or mutations, suggesting possible molecular mechanisms for well-developed otoliths in the family Sciaenidae.
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Affiliation(s)
- Wu Gan
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai, China.,Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, China
| | - Chenxi Zhao
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China.,Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, China
| | - Xinran Liu
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China.,Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, China
| | - Chao Bian
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China.,Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, China
| | - Qiong Shi
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China.,Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, China
| | - Xinxin You
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China.,Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, China
| | - Wei Song
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai, China.,BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, China.,Shenzhen Key Lab of Marine Genomics, Guangdong Provincial Key Lab of Molecular Breeding in Marine Economic Animals, BGI Academy of Marine Sciences, BGI Marine, BGI, Shenzhen, China
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Xu Y, Yang L, Zhao X, Zhang Y, Jones TA, Jones SM, Lundberg YW. Functional cooperation between two otoconial proteins Oc90 and Nox3. J Vestib Res 2021; 31:441-449. [PMID: 33554930 DOI: 10.3233/ves-201591] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Otoconia-related vertigo and balance deficits are common in humans, but the molecular etiology is unknown at present. OBJECTIVE In order to study mechanisms of otoconia formation and maintenance, we have investigated whether otoconin-90 (Oc90), the predominant otoconial constituent protein, and the NADPH oxidase Nox3, an essential regulatory protein for otoconia formation, are functionally interlinked. METHODS We performed balance behavioral, electrophysiological, morphological and molecular cellular analyses. RESULTS Double heterozygous mutant mice for Oc90 and Nox3 show severe imbalance, albeit less profound than double null mutants. In contrast, single heterozygous mutant mice have normal balance. Double heterozygous mice have otoconia defects and double null mice have no otoconia. In addition, some hair bundles in the latter mice go through accelerated degeneration. In vitro calcification analysis in cells stably expressing these proteins singly and doubly shows much more intense calcification in the double transfectants. CONCLUSIONS Oc90 and Nox3 augment each other's function, which is not only critical for otoconia formation but also for hair bundle maintenance.
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Affiliation(s)
- Yinfang Xu
- Vestibular Genetics Laboratory, Boys Town National Research Hospital, Omaha, NE, USA
| | - Liping Yang
- Vestibular Genetics Laboratory, Boys Town National Research Hospital, Omaha, NE, USA.,Current address: Changsha Environmental Protection College, 10 Jinggui Rd, Yuhua Qu, Changsha, Hunan, China
| | - Xing Zhao
- Vestibular Genetics Laboratory, Boys Town National Research Hospital, Omaha, NE, USA
| | - Yan Zhang
- Vestibular Genetics Laboratory, Boys Town National Research Hospital, Omaha, NE, USA
| | - Timothy A Jones
- Department of Special Education and Communication Disorders, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Sherri M Jones
- Department of Special Education and Communication Disorders, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Yunxia Wang Lundberg
- Vestibular Genetics Laboratory, Boys Town National Research Hospital, Omaha, NE, USA
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Wu Y, Han W, Yan W, Lu X, Zhou M, Li L, Guan Q, Fan Z. Increased Otolin-1 in Serum as a Potential Biomarker for Idiopathic Benign Paroxysmal Positional Vertigo Episodes. Front Neurol 2020; 11:367. [PMID: 32477244 PMCID: PMC7237635 DOI: 10.3389/fneur.2020.00367] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 04/14/2020] [Indexed: 12/11/2022] Open
Abstract
Objective: Otolin-1, a main specific otoconia matrix protein, passes through the labyrinth-blood barrier and is detectable in peripheral blood. Serum otolin-1 levels differ between patients with benign paroxysmal positional vertigo (BPPV) and healthy controls and are significantly age-related, increasing in healthy controls with age, suggesting that serum otolin-1 levels reflect otolith status. The aim of this study was to determine whether otolin-1 levels change during vertigo episodes in patients with BPPV and whether any change is specific and sensitive enough for BPPV episodes. Method: Patients diagnosed with de novo idiopathic BPPV during an acute episode were included in the study from May 2017 to May 2018. Blood samples were drawn before patients were treated with canalith-repositioning maneuvers. Serum otolin-1 levels were compared between 78 patients and 121 age- and sex-matched healthy individuals. Results: There were no significant differences between the groups in the age distribution, sex ratio, body mass index, clinical history, routine blood parameters, or total protein, albumin, uric acid, creatinine, blood urea nitrogen and lipid profiles (P > 0.05). Serum levels of otolin-1 were significantly higher in BPPV patients than in healthy controls (P < 0.001). Receiver operating characteristic analysis revealed that a serum otolin-1 value of 299.45 pg/ml was the optimal cut-off value to discriminate patients with BPPV from healthy controls (area under the curve 0.757, 95% CI 0.687~0.826) with a sensitivity of 67.9% and a specificity of 72.7%. Conclusion: Serum levels of otolin-1 may be a potential biomarker for BPPV episodes.
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Affiliation(s)
- Yunqin Wu
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, China.,Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, China
| | - Weiwei Han
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, China.,Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, China.,Department of Rehabilitation, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, China
| | - Wang Yan
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, China.,Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, China
| | - Xiaoxiong Lu
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, China.,Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, China
| | - Min Zhou
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, China.,Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, China
| | - Li Li
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, China.,Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, China
| | - Qiongfeng Guan
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, China.,Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, China
| | - Zhenyi Fan
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Science, Ningbo, China.,Ningbo Institute of Life and Health Industry, University of Chinese Academy of Science, Ningbo, China
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Porębska A, Różycka M, Hołubowicz R, Szewczuk Z, Ożyhar A, Dobryszycki P. Functional derivatives of human dentin matrix protein 1 modulate morphology of calcium carbonate crystals. FASEB J 2020; 34:6147-6165. [PMID: 32190922 DOI: 10.1096/fj.201901999r] [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: 08/06/2019] [Revised: 02/07/2020] [Accepted: 02/21/2020] [Indexed: 12/23/2022]
Abstract
Dentin matrix protein 1 (DMP1) is an acidic, extracellular matrix protein essential for biomineralization of calcium phosphate, in bone and dentin. It is proteolytically processed into two fragments, 44K and 56K. Recently, the presence of DMP1 was noticed in inner ear, specifically in otoconia, which are calcium carbonate biominerals involved in sensing of balance. In this study, the solution structure and biomineralization activity of otoconial 44K and 56K fragments toward calcium carbonate were investigated. The results of analytical ultracentrifugation, circular dichroism, and gel filtration indicated that DMP1 fragments are disordered in solution. Notably, 56K formed oligomers in the presence of calcium ions. It was also observed that both fragments influenced the crystal growth by in vitro biomineralization assay and scanning electron microscopy. In addition, they sequester the calcium ions during the calcite formation. Calcium carbonate crystals precipitated in vitro changed their size and shape in the presence of DMP1 fragments. Oligomerization propensity of 56K may significantly enhance this function. Our study indicates that intrinsically disordered DMP1 has a previously unknown regulatory function for biomineralization of otoconia.
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Affiliation(s)
- Aleksandra Porębska
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wrocław University of Science and Technology, Wrocław, Poland
| | - Mirosława Różycka
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wrocław University of Science and Technology, Wrocław, Poland
| | - Rafał Hołubowicz
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wrocław University of Science and Technology, Wrocław, Poland
| | | | - Andrzej Ożyhar
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wrocław University of Science and Technology, Wrocław, Poland
| | - Piotr Dobryszycki
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wrocław University of Science and Technology, Wrocław, Poland
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Berekméri E, Szepesy J, Köles L, Zelles T. Purinergic signaling in the organ of Corti: Potential therapeutic targets of sensorineural hearing losses. Brain Res Bull 2019; 151:109-118. [PMID: 30721767 DOI: 10.1016/j.brainresbull.2019.01.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 01/10/2019] [Accepted: 01/25/2019] [Indexed: 01/04/2023]
Abstract
Purinergic signaling is deeply involved in the development, functions and protective mechanisms of the cochlea. Release of ATP and activation of purinergic receptors on sensory and supporting/epithelial cells play a substantial role in cochlear (patho)physiology. Both the ionotropic P2X and the metabotropic P2Y receptors are widely distributed on the inner and outer hair cells as well as on the different supporting cells in the organ of Corti and on other epithelial cells in the scala media. Among others, they are implicated in the sensitivity adjustment of the receptor cells by a K+ shunt and can attenuate the cochlear amplification by modifying cochlear micromechanics acting on outer hair cells and supporting cells. Cochlear blood flow is also regulated by purines. Sensorineural hearing losses currently lack any specific or efficient pharmacotherapy. Decreasing hearing sensitivity and increasing cochlear blood supply by pharmacological targeting of purinergic signaling in the cochlea are potential new therapeutic approaches in these hearing disabilities, especially in the noise-induced ones.
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Affiliation(s)
- Eszter Berekméri
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
| | - Judit Szepesy
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
| | - László Köles
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
| | - Tibor Zelles
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary; Department of Pharmacology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
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