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Ohlemiller KK, Dwyer N, Henson V, Fasman K, Hirose K. A critical evaluation of "leakage" at the cochlear blood-stria-barrier and its functional significance. Front Mol Neurosci 2024; 17:1368058. [PMID: 38486963 PMCID: PMC10937559 DOI: 10.3389/fnmol.2024.1368058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 02/16/2024] [Indexed: 03/17/2024] Open
Abstract
The blood-labyrinth-barrier (BLB) is a semipermeable boundary between the vasculature and three separate fluid spaces of the inner ear, the perilymph, the endolymph and the intrastrial space. An important component of the BLB is the blood-stria-barrier, which shepherds the passage of ions and metabolites from strial capillaries into the intrastrial space. Some investigators have reported increased "leakage" from these capillaries following certain experimental interventions, or in the presence of inflammation or genetic variants. This leakage is generally thought to be harmful to cochlear function, principally by lowering the endocochlear potential (EP). Here, we examine evidence for this dogma. We find that strial capillaries are not exclusive, and that the asserted detrimental influence of strial capillary leakage is often confounded by hair cell damage or intrinsic dysfunction of the stria. The vast majority of previous reports speculate about the influence of strial vascular barrier function on the EP without directly measuring the EP. We argue that strial capillary leakage is common across conditions and species, and does not significantly impact the EP or hearing thresholds, either on evidentiary or theoretical grounds. Instead, strial capillary endothelial cells and pericytes are dynamic and allow permeability of varying degrees in response to specific conditions. We present observations from mice and demonstrate that the mechanisms of strial capillary transport are heterogeneous and inconsistent among inbred strains.
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Affiliation(s)
- Kevin K. Ohlemiller
- Department of Otolaryngology, Washington University School of Medicine, St. Louis, MO, United States
- Program in Communication Sciences and Audiology, Washington University School of Medicine, St. Louis, MO, United States
| | - Noël Dwyer
- Program in Communication Sciences and Audiology, Washington University School of Medicine, St. Louis, MO, United States
| | - Veronica Henson
- Program in Communication Sciences and Audiology, Washington University School of Medicine, St. Louis, MO, United States
| | - Kaela Fasman
- Program in Communication Sciences and Audiology, Washington University School of Medicine, St. Louis, MO, United States
| | - Keiko Hirose
- Department of Otolaryngology, Washington University School of Medicine, St. Louis, MO, United States
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Wang S, Li M, Liu P, Dong Y, Geng R, Zheng T, Zheng Q, Li B, Ma P. Col1a1 mediates the focal adhesion pathway affecting hearing in miR-29a mouse model by RNA-seq analysis. Exp Gerontol 2024; 185:112349. [PMID: 38103809 DOI: 10.1016/j.exger.2023.112349] [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: 09/27/2023] [Revised: 11/29/2023] [Accepted: 12/13/2023] [Indexed: 12/19/2023]
Abstract
Age-related hearing loss (ARHL) is a common neurodegenerative disease. Its molecular mechanisms have not been fully elucidated. In the present study, we obtained differential mRNA expression in the cochlea of 2-month-old miR-29a+/+ mice and miR-29a-/- mice by RNA-seq. Gene ontology (GO) analysis was used to identify molecular functions associated with hearing in miR-29a-/- mice, including being actin binding (GO: 0003779) and immune processes. We focused on the intersection of differential genes, miR-29a target genes and the sensory perception of sound (GO:0007605) genes, with six mRNA at this intersection, and we selected Col1a1 as our target gene. We validated Col1a1 as the direct target of miR-29a by molecular and cellular experiments. Total 6 pathways involved in Col1a1 were identified by through Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis. We selected the focal adhesion pathway as our target pathway based. Their expression levels in miR-29a-/- mice were verified by qRT-PCR and Western blot. Compared with miR-29a+/+ mice, the expression levels of Col1a1, Itga4, Itga2, Itgb3, Itgb7, Pik3r3 and Ptk2 were different in miR-29a-/- mice. Immunofluorescence was used to locate genes in the cochlea. Col1a1, Itga4 and Itgb3 were differentially expressed in the basilar membranes and stria vascularis and spiral ganglion neurons compared to miR-29a+/+ mice. Pik3r3 and Ptk2 were differentially expressed in the basilar membranes and stria vascularis, but not at the s spiral ganglion neurons compared to miR-29a+/+ mice. Our results show that when miR-29a is knocked out, the Col1a1 mediates the focal adhesion pathway may affect the hearing of miR-29a-/- mice. These findings may provide a new direction for effective treatment of age-related hearing loss.
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Affiliation(s)
- Shuli Wang
- Hearing and Speech Rehabilitation Institute, School of Special Education, Binzhou Medical University, Yantai, China
| | - Mulan Li
- Hearing and Speech Rehabilitation Institute, School of Special Education, Binzhou Medical University, Yantai, China
| | - Pengcheng Liu
- Hearing and Speech Rehabilitation Institute, School of Special Education, Binzhou Medical University, Yantai, China
| | - Yaning Dong
- Hearing and Speech Rehabilitation Institute, School of Special Education, Binzhou Medical University, Yantai, China
| | - Ruishuang Geng
- Hearing and Speech Rehabilitation Institute, School of Special Education, Binzhou Medical University, Yantai, China
| | - Tihua Zheng
- Hearing and Speech Rehabilitation Institute, School of Special Education, Binzhou Medical University, Yantai, China
| | - Qingyin Zheng
- Hearing and Speech Rehabilitation Institute, School of Special Education, Binzhou Medical University, Yantai, China
| | - Bo Li
- Hearing and Speech Rehabilitation Institute, School of Special Education, Binzhou Medical University, Yantai, China.
| | - Peng Ma
- Hearing and Speech Rehabilitation Institute, School of Special Education, Binzhou Medical University, Yantai, China; School of Basic Medicine, Binzhou Medical University, Yantai, China.
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郭 丽, 刘 薇, 陈 敏, 徐 佳, 马 宁, 张 晓, 段 清, 刘 珊, 王 晓, 甄 俊, 倪 鑫, 张 杰. [Long-term auditory monitoring in children with Alport syndrome based on different degrees of renal injury]. LIN CHUANG ER BI YAN HOU TOU JING WAI KE ZA ZHI = JOURNAL OF CLINICAL OTORHINOLARYNGOLOGY, HEAD, AND NECK SURGERY 2024; 38:44-49. [PMID: 38297848 PMCID: PMC11116163 DOI: 10.13201/j.issn.2096-7993.2024.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Indexed: 02/02/2024]
Abstract
Objective:To investigate long-term auditory changes and characteristics of Alport syndrome(AS) patients with different degrees of renal injury. Methods:Retrospectively analyzing clinical data of patients diagnosed AS from January 2007 to September 2022, including renal pathology, genetic detection and hearing examination. A long-term follow-up focusing on hearing and renal function was conducted. Results:This study included 70 AS patients, of which 33(25 males, 8 females, aged 3.4-27.8 years) were followed up, resulting in a loss rate of 52.9%.The follow-up period ranged from 1.1to 15.8 years, with 16 patients followed-up for over 10 years. During the follow-up, 10 patients presenting with hearing abnormalities at the time of diagnosis of AS had progressive hearing loss, and 3 patients with new hearing abnormalities were followed up, which appeared at 5-6 years of disease course. All of which were sensorineural deafness. While only 3 patients with hearing abnormalities among 13 patients received hearing aid intervention. Of these patients,7 developed end-stage renal disease(ESRD), predominantly males (6/7). The rate of long-term hearing loss was significantly different between ESRD group and non-ESRD group(P=0.013). There was no correlation between the progression of renal disease and long-term hearing level(P>0.05). kidney biopsies from 28 patients revealed varying degrees of podocyte lesion and uneven thickness of basement membrane. The severity of podocyte lesion was correlated with the rate of long-term hearing loss(P=0.048), and there was no correlation with the severity of hearing loss(P>0.05). Among 11 cases, theCOL4A5mutationwas most common (8 out of 11), but there was no significant correlation between the mutation type and hearing phenotype(P>0.05). Conclusion:AS patients exhibit progressive hearing loss with significant heterogeneity over the long-term.. THearing loss is more likely to occur 5-6 years into the disease course. Hearing abnormalities are closely related to renal disease status, kidney tissue pathology, and gene mutations, emphasizing the need for vigilant long-term hearing follow-up and early intervention.
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Affiliation(s)
- 丽宁 郭
- 国家儿童医学中心 首都医科大学附属北京儿童医院耳鼻咽喉头颈外科(北京,100045)Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing 100045, China
- 儿童耳鼻咽喉头颈外科疾病北京市重点实验室Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery
| | - 薇 刘
- 国家儿童医学中心 首都医科大学附属北京儿童医院耳鼻咽喉头颈外科(北京,100045)Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing 100045, China
- 儿童耳鼻咽喉头颈外科疾病北京市重点实验室Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery
| | - 敏 陈
- 国家儿童医学中心 首都医科大学附属北京儿童医院耳鼻咽喉头颈外科(北京,100045)Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing 100045, China
- 儿童耳鼻咽喉头颈外科疾病北京市重点实验室Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery
| | - 佳童 徐
- 首都医科大学附属北京儿童医院病理科Department of Pathology, Beijing Children′s Hospital, Capital Medical University
| | - 宁 马
- 国家儿童医学中心 首都医科大学附属北京儿童医院耳鼻咽喉头颈外科(北京,100045)Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing 100045, China
- 儿童耳鼻咽喉头颈外科疾病北京市重点实验室Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery
| | - 晓 张
- 国家儿童医学中心 首都医科大学附属北京儿童医院耳鼻咽喉头颈外科(北京,100045)Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing 100045, China
- 儿童耳鼻咽喉头颈外科疾病北京市重点实验室Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery
| | - 清川 段
- 国家儿童医学中心 首都医科大学附属北京儿童医院耳鼻咽喉头颈外科(北京,100045)Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing 100045, China
- 儿童耳鼻咽喉头颈外科疾病北京市重点实验室Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery
| | - 珊珊 刘
- 国家儿童医学中心 首都医科大学附属北京儿童医院耳鼻咽喉头颈外科(北京,100045)Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing 100045, China
- 儿童耳鼻咽喉头颈外科疾病北京市重点实验室Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery
| | - 晓旭 王
- 国家儿童医学中心 首都医科大学附属北京儿童医院耳鼻咽喉头颈外科(北京,100045)Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing 100045, China
- 儿童耳鼻咽喉头颈外科疾病北京市重点实验室Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery
| | - 俊淞 甄
- 国家儿童医学中心 首都医科大学附属北京儿童医院耳鼻咽喉头颈外科(北京,100045)Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing 100045, China
- 儿童耳鼻咽喉头颈外科疾病北京市重点实验室Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery
| | - 鑫 倪
- 国家儿童医学中心 首都医科大学附属北京儿童医院耳鼻咽喉头颈外科(北京,100045)Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing 100045, China
- 儿童耳鼻咽喉头颈外科疾病北京市重点实验室Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery
| | - 杰 张
- 国家儿童医学中心 首都医科大学附属北京儿童医院耳鼻咽喉头颈外科(北京,100045)Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children′s Hospital, Capital Medical University, National Center for Children′s Health, Beijing 100045, China
- 儿童耳鼻咽喉头颈外科疾病北京市重点实验室Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and Neck Surgery
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Pressé MT, Malgrange B, Delacroix L. The cochlear matrisome: Importance in hearing and deafness. Matrix Biol 2024; 125:40-58. [PMID: 38070832 DOI: 10.1016/j.matbio.2023.12.002] [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: 08/25/2023] [Revised: 11/20/2023] [Accepted: 12/06/2023] [Indexed: 02/12/2024]
Abstract
The extracellular matrix (ECM) consists in a complex meshwork of collagens, glycoproteins, and proteoglycans, which serves a scaffolding function and provides viscoelastic properties to the tissues. ECM acts as a biomechanical support, and actively participates in cell signaling to induce tissular changes in response to environmental forces and soluble cues. Given the remarkable complexity of the inner ear architecture, its exquisite structure-function relationship, and the importance of vibration-induced stimulation of its sensory cells, ECM is instrumental to hearing. Many factors of the matrisome are involved in cochlea development, function and maintenance, as evidenced by the variety of ECM proteins associated with hereditary deafness. This review describes the structural and functional ECM components in the auditory organ and how they are modulated over time and following injury.
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Affiliation(s)
- Mary T Pressé
- Developmental Neurobiology Unit, GIGA-Neurosciences, University of Liège, 15 avenue Hippocrate - CHU - B36 (1st floor), Liège B-4000, Belgium
| | - Brigitte Malgrange
- Developmental Neurobiology Unit, GIGA-Neurosciences, University of Liège, 15 avenue Hippocrate - CHU - B36 (1st floor), Liège B-4000, Belgium
| | - Laurence Delacroix
- Developmental Neurobiology Unit, GIGA-Neurosciences, University of Liège, 15 avenue Hippocrate - CHU - B36 (1st floor), Liège B-4000, Belgium.
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5
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Sandow SL, Wilson SM, Leo MD. Editorial: The role of pericytes in physiology and pathophysiology. Front Physiol 2023; 14:1306031. [PMID: 37929215 PMCID: PMC10625401 DOI: 10.3389/fphys.2023.1306031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 10/10/2023] [Indexed: 11/07/2023] Open
Affiliation(s)
- Shaun L. Sandow
- Biomedical Science, School of Health, University of the Sunshine Coast, Maroochydore, and Center for Clinical Research, Faculty of Medicine, University of Queensland, Brisbane, QLD, Australia
| | - Sean M. Wilson
- Division of Pharmacology, School of Medicine, Loma Linda University, Loma Linda, CA, United States
| | - M. Dennis Leo
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN, United States
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Cosgrove D, Gratton MA, Madison J, Vosik D, Samuelson G, Meehan D, Delimont D, Phillips G, Smyth B, Pramparo T, Jarocki D, Nguyen M, Komers R, Jenkinson C. Dual inhibition of the endothelin and angiotensin receptor ameliorates renal and inner ear pathologies in Alport mice. J Pathol 2023; 260:353-364. [PMID: 37256677 PMCID: PMC10330771 DOI: 10.1002/path.6087] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/08/2023] [Accepted: 04/04/2023] [Indexed: 06/01/2023]
Abstract
Alport syndrome (AS), a type IV collagen disorder, leads to glomerular disease and, in some patients, hearing loss. AS is treated with inhibitors of the renin-angiotensin system; however, a need exists for novel therapies, especially those addressing both major pathologies. Sparsentan is a single-molecule dual endothelin type-A and angiotensin II type 1 receptor antagonist (DEARA) under clinical development for focal segmental glomerulosclerosis and IgA nephropathy. We report the ability of sparsentan to ameliorate both renal and inner ear pathologies in an autosomal-recessive Alport mouse model. Sparsentan significantly delayed onset of glomerulosclerosis, interstitial fibrosis, proteinuria, and glomerular filtration rate decline. Sparsentan attenuated glomerular basement membrane defects, blunted mesangial filopodial invasion into the glomerular capillaries, increased lifespan more than losartan, and lessened changes in profibrotic/pro-inflammatory gene pathways in both the glomerular and the renal cortical compartments. Notably, treatment with sparsentan, but not losartan, prevented accumulation of extracellular matrix in the strial capillary basement membranes in the inner ear and reduced susceptibility to hearing loss. Improvements in lifespan and in renal and strial pathology were observed even when sparsentan was initiated after development of renal pathologies. These findings suggest that sparsentan may address both renal and hearing pathologies in Alport syndrome patients. © 2023 Travere Therapeutics, Inc and The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of The Pathological Society of Great Britain and Ireland.
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Affiliation(s)
- Dominic Cosgrove
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Michael Anne Gratton
- Department of Otolaryngology, Washington University in St. Louis, St. Louis, MO, USA
| | - Jacob Madison
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Denise Vosik
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Gina Samuelson
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Daniel Meehan
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Duane Delimont
- Center for Sensory Neuroscience, Boys Town National Research Hospital, Omaha, NE, USA
| | - Grady Phillips
- Department of Otolaryngology, Washington University in St. Louis, St. Louis, MO, USA
| | - Brendan Smyth
- Department of Otolaryngology, Washington University in St. Louis, St. Louis, MO, USA
| | | | - Diana Jarocki
- Department of Otolaryngology, Washington University in St. Louis, St. Louis, MO, USA
| | - Mai Nguyen
- Travere Therapeutics, San Diego, CA, USA
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Ma P, Wang S, Geng R, Gong Y, Li M, Xie D, Dong Y, Zheng T, Li B, Zhao T, Zheng Q. MiR-29a-deficiency causes thickening of the basilar membrane and age-related hearing loss by upregulating collagen IV and laminin. Front Cell Neurosci 2023; 17:1191740. [PMID: 37275774 PMCID: PMC10232818 DOI: 10.3389/fncel.2023.1191740] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 05/03/2023] [Indexed: 06/07/2023] Open
Abstract
Age-related hearing loss (ARHL) is the most common sensory degenerative disease and can significantly impact the quality of life in elderly people. A previous study using GeneChip miRNA microarray assays showed that the expression of miR-29a changes with age, however, its role in hearing loss is still unclear. In this study, we characterized the cochlear phenotype of miR-29a knockout (miR-29a-/-) mice and found that miR-29a-deficient mice had a rapid progressive elevation of the hearing threshold from 2 to 5 months of age compared with littermate controls as measured by the auditory brainstem response. Stereocilia degeneration, hair cell loss and abnormal stria vascularis (SV) were observed in miR-29a-/- mice at 4 months of age. Transcriptome sequencing results showed elevated extracellular matrix (ECM) gene expression in miR-29a-/- mice. Both Gene Ontology (GO) annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis revealed that the key differences were closely related to ECM. Further examination with a transmission electron microscope showed thickening of the basilar membrane in the cochlea of miR-29a-/- mice. Five Col4a genes (Col4a1-a5) and two laminin genes (Lamb2 and Lamc1) were validated as miR-29a direct targets by dual luciferase assays and miR-29a inhibition assays with a miR-29a inhibitor. Consistent with the target gene validation results, the expression of these genes was significantly increased in the cochlea of miR-29a-/- mice, as shown by RT-PCR and Western blot. These findings suggest that miR-29a plays an important role in maintaining cochlear structure and function by regulating the expression of collagen and laminin and that the disturbance of its expression could be a cause of progressive hearing loss.
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Affiliation(s)
- Peng Ma
- School of Basic Medicine, Qingdao University, Qingdao, China
- School of Basic Medicine, Binzhou Medical University, Yantai, China
| | - Shuli Wang
- Department of Hearing and Speech Rehabilitation, School of Special Education, Binzhou Medical University, Yantai, China
| | - Ruishuang Geng
- Department of Hearing and Speech Rehabilitation, School of Special Education, Binzhou Medical University, Yantai, China
| | - Yongfeng Gong
- School of Basic Medicine, Binzhou Medical University, Yantai, China
| | - Mulan Li
- Department of Hearing and Speech Rehabilitation, School of Special Education, Binzhou Medical University, Yantai, China
| | - Daoli Xie
- Department of Hearing and Speech Rehabilitation, School of Special Education, Binzhou Medical University, Yantai, China
| | - Yaning Dong
- Department of Hearing and Speech Rehabilitation, School of Special Education, Binzhou Medical University, Yantai, China
| | - Tihua Zheng
- Department of Hearing and Speech Rehabilitation, School of Special Education, Binzhou Medical University, Yantai, China
| | - Bo Li
- Department of Hearing and Speech Rehabilitation, School of Special Education, Binzhou Medical University, Yantai, China
| | - Tong Zhao
- Department of Hearing and Speech Rehabilitation, School of Special Education, Binzhou Medical University, Yantai, China
| | - Qingyin Zheng
- School of Basic Medicine, Qingdao University, Qingdao, China
- Department of Otolaryngology, Case Western Reserve University, Cleveland, OH, United States
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8
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Zhao C, Yang Z, Gong S, Du Z. Adenovirus-mediated SIRT1 protects cochlear strial marginal cells in a D-gal-induced senescent model in vitro. Mol Biol Rep 2023; 50:541-551. [PMID: 36350417 DOI: 10.1007/s11033-022-08032-6] [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: 08/03/2022] [Accepted: 10/13/2022] [Indexed: 11/10/2022]
Abstract
BACKGROUND A primary obstacle in age-related hearing loss (ARHL) study is the lack of accelerated senescent models in vitro that explore the precise underlying mechanism in different types of ARHL. The damage to strial marginal cells (SMCs) is a subset of strial presbycusis-associated pathological changes. We aimed to establish a D-galactose (D-gal)-induced SMCs senescent model and study the effect of deacetylase sirtuin 1 (SIRT1) on presbycusis in vitro. METHODS SMCs from C57BL/6J neonatal mice were cultured and treated with D-gal to establish accelerated senescent models. And then D-gal-induced SMCs were transfected with adenovirus (Ad)-SIRT1-GFP or Ad-GFP. Oxidative stress and mitochondrial DNA (mtDNA) damage were determined by histological analysis or RT-PCR. Western blotting (WB) and RT-PCR were used to evaluate protein and mRNA levels of superoxide dismutase 2 (SOD2) and SIRT1, respectively. Additionally, apoptosis was investigated by WB and TUNEL staining. RESULTS D-gal-induced SMCs exhibited several characteristics of senescence, including increased the level of 8-hydroxy-2'-deoxyguanosine, which is a marker of DNA oxidative damage, and elevated the amount of mtDNA 3860-bp deletion, which is a common type of mtDNA damage in the auditory system of mice. SIRT1 overexpression effectively inhibited these changes by upregulating the level of SOD2, thereby inhibiting cytochrome c translocation from mitochondria to cytoplasm, inhibiting cell apoptosis, and ultimately delaying aging in the D-gal-induced senescent SMCs. CONCLUSIONS Altogether, the evidence suggests that the D-gal-induced SMCs accelerated aging model is successfully established, and SIRT1 overexpression protects SMCs against oxidative stress by enhancing SOD2 expression in ARHL.
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Affiliation(s)
- Chunli Zhao
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, No. 95, Yong'an Road, Xicheng District, Beijing, 100050, China.,Clinical Center for Hearing Loss, Capital Medical University, Beijing, 100050, China
| | - Zijing Yang
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, No. 95, Yong'an Road, Xicheng District, Beijing, 100050, China.,Clinical Center for Hearing Loss, Capital Medical University, Beijing, 100050, China
| | - Shusheng Gong
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, No. 95, Yong'an Road, Xicheng District, Beijing, 100050, China. .,Clinical Center for Hearing Loss, Capital Medical University, Beijing, 100050, China.
| | - Zhengde Du
- Department of Otolaryngology Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, No. 95, Yong'an Road, Xicheng District, Beijing, 100050, China. .,Clinical Center for Hearing Loss, Capital Medical University, Beijing, 100050, China.
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Thulasiram MR, Ogier JM, Dabdoub A. Hearing Function, Degeneration, and Disease: Spotlight on the Stria Vascularis. Front Cell Dev Biol 2022; 10:841708. [PMID: 35309932 PMCID: PMC8931286 DOI: 10.3389/fcell.2022.841708] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 01/20/2022] [Indexed: 11/21/2022] Open
Abstract
The stria vascularis (SV) is a highly vascularized tissue lining the lateral wall of the cochlea. The SV maintains cochlear fluid homeostasis, generating the endocochlear potential that is required for sound transduction. In addition, the SV acts as an important blood-labyrinth barrier, tightly regulating the passage of molecules from the blood into the cochlea. A healthy SV is therefore vital for hearing function. Degeneration of the SV is a leading cause of age-related hearing loss, and has been associated with several hearing disorders, including Norrie disease, Meniere's disease, Alport syndrome, Waardenburg syndrome, and Cytomegalovirus-induced hearing loss. Despite the SV's important role in hearing, there is still much that remains to be discovered, including cell-specific function within the SV, mechanisms of SV degeneration, and potential protective or regenerative therapies. In this review, we discuss recent discoveries elucidating the molecular regulatory networks of SV function, mechanisms underlying degeneration of the SV, and otoprotective strategies for preventing drug-induced SV damage. We also highlight recent clinical developments for treating SV-related hearing loss and discuss future research trajectories in the field.
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Affiliation(s)
- Matsya R Thulasiram
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - Jacqueline M Ogier
- Biological Sciences, Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Alain Dabdoub
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
- Biological Sciences, Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
- Department of Otolaryngology–Head and Neck Surgery, University of Toronto, Toronto, ON, Canada
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10
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Frenis K, Kuntic M, Hahad O, Bayo Jimenez MT, Oelze M, Daub S, Steven S, Münzel T, Daiber A. Redox Switches in Noise-Induced Cardiovascular and Neuronal Dysregulation. Front Mol Biosci 2021; 8:784910. [PMID: 34869603 PMCID: PMC8637611 DOI: 10.3389/fmolb.2021.784910] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 10/28/2021] [Indexed: 12/12/2022] Open
Abstract
Environmental exposures represent a significant health hazard, which cumulatively may be responsible for up to 2/3 of all chronic non-communicable disease and associated mortality (Global Burden of Disease Study and The Lancet Commission on Pollution and Health), which has given rise to a new concept of the exposome: the sum of environmental factors in every individual’s experience. Noise is part of the exposome and is increasingly being investigated as a health risk factor impacting neurological, cardiometabolic, endocrine, and immune health. Beyond the well-characterized effects of high-intensity noise on cochlear damage, noise is relatively well-studied in the cardiovascular field, where evidence is emerging from both human and translational experiments that noise from traffic-related sources could represent a risk factor for hypertension, ischemic heart disease, diabetes, and atherosclerosis. In the present review, we comprehensively discuss the current state of knowledge in the field of noise research. We give a brief survey of the literature documenting experiments in noise exposure in both humans and animals with a focus on cardiovascular disease. We also discuss the mechanisms that have been uncovered in recent years that describe how exposure to noise affects physiological homeostasis, leading to aberrant redox signaling resulting in metabolic and immune consequences, both of which have considerable impact on cardiovascular health. Additionally, we discuss the molecular pathways of redox involvement in the stress responses to noise and how they manifest in disruptions of the circadian rhythm, inflammatory signaling, gut microbiome composition, epigenetic landscape and vessel function.
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Affiliation(s)
- Katie Frenis
- Department of Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany.,Boston Children's Hospital and Harvard Medical School, Boston, MA, United States
| | - Marin Kuntic
- Department of Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany
| | - Omar Hahad
- Department of Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site Rhine-Main, Mainz, Germany
| | | | - Matthias Oelze
- Department of Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany
| | - Steffen Daub
- Department of Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany
| | - Sebastian Steven
- Department of Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany
| | - Thomas Münzel
- Department of Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site Rhine-Main, Mainz, Germany
| | - Andreas Daiber
- Department of Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site Rhine-Main, Mainz, Germany
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11
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Yu W, Zong S, Du P, Zhou P, Li H, Wang E, Xiao H. Role of the Stria Vascularis in the Pathogenesis of Sensorineural Hearing Loss: A Narrative Review. Front Neurosci 2021; 15:774585. [PMID: 34867173 PMCID: PMC8640081 DOI: 10.3389/fnins.2021.774585] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 10/28/2021] [Indexed: 12/20/2022] Open
Abstract
Sensorineural hearing loss is a common sensory impairment in humans caused by abnormalities in the inner ear. The stria vascularis is regarded as a major cochlear structure that can independently degenerate and influence the degree of hearing loss. This review summarizes the current literature on the role of the stria vascularis in the pathogenesis of sensorineural hearing loss resulting from different etiologies, focusing on both molecular events and signaling pathways, and further attempts to explore the underlying mechanisms at the cellular and molecular biological levels. In addition, the deficiencies and limitations of this field are discussed. With the rapid progress in scientific technology, new opportunities are arising to fully understand the role of the stria vascularis in the pathogenesis of sensorineural hearing loss, which, in the future, will hopefully lead to the prevention, early diagnosis, and improved treatment of sensorineural hearing loss.
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Affiliation(s)
- Wenting Yu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shimin Zong
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Peiyu Du
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Peng Zhou
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hejie Li
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Enhao Wang
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hongjun Xiao
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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12
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Endothelin receptor antagonists for the treatment of diabetic and nondiabetic chronic kidney disease. Curr Opin Nephrol Hypertens 2021; 30:456-465. [PMID: 33990507 DOI: 10.1097/mnh.0000000000000716] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE OF REVIEW To summarize new clinical findings of endothelin receptor antagonists (ERA) in various etiologies of kidney disease targeted in clinical trials. RECENT FINDINGS Endothelin-1 is a multifunctional peptide with potential relevance to glomerular and tubulointerstitial kidney diseases. The phase 3 SONAR trial demonstrated a significant reduction in clinically relevant kidney outcomes for patients with diabetic kidney disease (DKD) after long-term treatment with the ERA, atrasentan, in addition to blockade of the renin-angiotensin-aldosterone system. Promising preclinical disease models and small clinical trials in non-DKD resulted in the initiation of phase 3 trials investigating the effects of long-term treatment with ERA in patients with immunoglobulin A (IgA) nephropathy and focal segmental glomeruloscelerosis (FSGS). The mechanisms by which ERA protects the kidneys have been extensively studied with evidence for the protection of tubule cells, podocytes, mesangial cells, the endothelial glycocalyx, and a reduction in glomerular perfusion pressure. The occurrence of fluid retention during ERA treatment, particularly in susceptible populations, necessitates strategies to support safe and effective treatment. SUMMARY Treatment with ERA induces long-term kidney protection in DKD. Phase 3 trials are underway to investigate ERA effects in patients with IgA nephropathy and FSGS.
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13
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Tang S, Yonezawa T, Maeda Y, Ono M, Maeba T, Miyoshi T, Momota R, Tomono Y, Oohashi T. Lack of collagen α6(IV) chain in mice does not cause severe-to-profound hearing loss or cochlear malformation, a distinct phenotype from nonsyndromic hearing loss with COL4A6 missense mutation. PLoS One 2021; 16:e0249909. [PMID: 33848312 PMCID: PMC8043391 DOI: 10.1371/journal.pone.0249909] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 03/26/2021] [Indexed: 11/18/2022] Open
Abstract
Congenital hearing loss affects 1 in every 1000 births, with genetic mutations contributing to more than 50% of all cases. X-linked nonsyndromic hereditary hearing loss is associated with six loci (DFNX1-6) and five genes. Recently, the missense mutation (c.1771G>A, p.Gly591Ser) in COL4A6, encoding the basement membrane (BM) collagen α6(IV) chain, was shown to be associated with X-linked congenital nonsyndromic hearing loss with cochlear malformation. However, the mechanism by which the COL4A6 mutation impacts hereditary hearing loss has not yet been elucidated. Herein, we investigated Col4a6 knockout (KO) effects on hearing function and cochlear formation in mice. Immunohistochemistry showed that the collagen α6(IV) chain was distributed throughout the mouse cochlea within subepithelial BMs underlying the interdental cells, inner sulcus cells, basilar membrane, outer sulcus cells, root cells, Reissner's membrane, and perivascular BMs in the spiral limbus, spiral ligament, and stria vascularis. However, the click-evoked auditory brainstem response analysis did not show significant changes in the hearing threshold of Col4a6 KO mice compared with wild-type (WT) mice with the same genetic background. In addition, the cochlear structures of Col4a6 KO mice did not exhibit morphological alterations, according to the results of high-resolution micro-computed tomography and histology. Hence, loss of Col4a6 gene expression in mice showed normal click ABR thresholds and normal cochlear formation, which differs from humans with the COL4A6 missense mutation c.1771G>A, p.Gly591Ser. Therefore, the deleterious effects in the auditory system caused by the missense mutation in COL4A6 are likely due to the dominant-negative effects of the α6(IV) chain and/or α5α6α5(IV) heterotrimer with an aberrant structure that would not occur in cases with loss of gene expression.
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Affiliation(s)
- Shaoying Tang
- Department of Molecular Biology and Biochemistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Tomoko Yonezawa
- Department of Molecular Biology and Biochemistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
- * E-mail:
| | - Yukihide Maeda
- Department of Otolaryngology-Head and Neck Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Mitsuaki Ono
- Department of Molecular Biology and Biochemistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Takahiro Maeba
- Department of Molecular Biology and Biochemistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Toru Miyoshi
- Department of Cardiovascular Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Ryusuke Momota
- Department of Human Morphology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yasuko Tomono
- Division of Molecular and Cell Biology, Shigei Medical Research Institute, Okayama, Japan
| | - Toshitaka Oohashi
- Department of Molecular Biology and Biochemistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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14
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Renauld JM, Davis W, Cai T, Cabrera C, Basch ML. Transcriptomic analysis and ednrb expression in cochlear intermediate cells reveal developmental differences between inner ear and skin melanocytes. Pigment Cell Melanoma Res 2021; 34:585-597. [PMID: 33484097 PMCID: PMC8186279 DOI: 10.1111/pcmr.12961] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 12/29/2020] [Accepted: 01/16/2021] [Indexed: 12/22/2022]
Abstract
In the inner ear, the neural crest gives rise to the glia of the VIII ganglion and two types of melanocytic cells: The pigmented cells of the vestibular system and intermediate cells of the stria vascularis. We analyzed the transcriptome of neonatal intermediate cells in an effort to better understand the development of the stria vascularis. We found that the expression of endothelin receptor B, which is essential for melanocyte development, persists in intermediate cells long after birth. In contrast, skin melanocytes rapidly downregulate the expression of EdnrB. Our findings suggest that endothelins might have co‐opted new functions in the inner ear during evolution of the auditory organ.
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Affiliation(s)
- Justine M Renauld
- Department of Otolaryngology, Head & Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - William Davis
- Department of Otolaryngology, Head & Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Tiantian Cai
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX, USA
| | - Claudia Cabrera
- Department of Otolaryngology, Head & Neck Surgery, University Hospitals, Cleveland, OH, USA
| | - Martin L Basch
- Department of Otolaryngology, Head & Neck Surgery, Case Western Reserve University School of Medicine, Cleveland, OH, USA.,Department of Otolaryngology, Head & Neck Surgery, University Hospitals, Cleveland, OH, USA.,Department of Genetics and Genome Sciences, Case Western Reserve School of Medicine, Cleveland, OH, USA.,Department of Biology, Case Western Reserve School of Medicine, Cleveland, OH, USA
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15
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Characterization of Sensorineural Hearing Loss in Children with Alport Syndrome. Life (Basel) 2020; 10:life10120360. [PMID: 33352923 PMCID: PMC7766141 DOI: 10.3390/life10120360] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/14/2020] [Accepted: 12/15/2020] [Indexed: 12/11/2022] Open
Abstract
Most adults with Alport syndrome (AS) suffer from progressive sensorineural hearing loss. However, little is known about the early characteristics of hearing loss in children with AS. As a part of the EARLY PRO-TECT Alport trial, this study was the first clinical trial ever to investigate hearing loss in children with AS over a timespan of up to six years Nine of 51 children (18%) had hearing impairment. Audiograms were divided into three age groups: in the 5–9-year-olds, the 4-pure tone average (4PTA) was 8.9 decibel (dB) (n = 15) in those with normal hearing and 43.8 dB (n = 2, 12%) in those with hearing impairment. Among the 10–13-year-olds, 4PTA was 4.8 dB (healthy, n = 12) and 41.4 dB (hearing impaired, n = 6.33%). For the 14–20-year-olds, the 4PTA was 7.0 dB (healthy; n = 9) and 48.2 dB (hearing impaired, n = 3.25%). On average, hearing thresholds of the hearing impaired group increased, especially at frequencies between 1–3 kHz. In conclusion, 18% of children developed hearing loss, with a maximum hearing loss in the audiograms at 1–3 kHz. The percentage of children with hearing impairment increased from 10% at baseline to 18% at end of trial as did the severity of hearing loss.
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16
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Dufek B, Meehan DT, Delimont D, Wilhelm K, Samuelson G, Coenen R, Madison J, Doyle E, Smyth B, Phillips G, Gratton MA, Cosgrove D. RNA-seq analysis of gene expression profiles in isolated stria vascularis from wild-type and Alport mice reveals key pathways underling Alport strial pathogenesis. PLoS One 2020; 15:e0237907. [PMID: 32822386 PMCID: PMC7446819 DOI: 10.1371/journal.pone.0237907] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 08/05/2020] [Indexed: 12/20/2022] Open
Abstract
Previous work demonstrates that the hearing loss in Alport mice is caused by defects in the stria vascularis. As the animals age, progressive thickening of strial capillary basement membranes (SCBMs) occurs associated with elevated levels of extracellular matrix expression and hypoxia-related gene and protein expression. These conditions render the animals susceptible to noise-induced hearing loss. In an effort to develop a more comprehensive understanding of how the underlying mutation in the COL4A3 gene influences homeostasis in the stria vascularis, we performed vascular permeability studies combined with RNA-seq analysis using isolated stria vascularis from 7-week old wild-type and Alport mice on the 129 Sv background. Alport SCBMs were found to be less permeable than wild-type littermates. RNA-seq and bioinformatics analysis revealed 68 genes were induced and 61 genes suppressed in the stria from Alport mice relative to wild-type using a cut-off of 2-fold. These included pathways involving transcription factors associated with the regulation of pro-inflammatory responses as well as cytokines, chemokines, and chemokine receptors that are up- or down-regulated. Canonical pathways included modulation of genes associated with glucose and glucose-1-PO4 degradation, NAD biosynthesis, histidine degradation, calcium signaling, and glutamate receptor signaling (among others). In all, the data point to the Alport stria being in an inflammatory state with disruption in numerous metabolic pathways indicative of metabolic stress, a likely cause for the susceptibility of Alport mice to noise-induced hearing loss under conditions that do not cause permanent hearing loss in age/strain-matched wild-type mice. The work lays the foundation for studies aimed at understanding the nature of strial pathology in Alport mice. The modulation of these genes under conditions of therapeutic intervention may provide important pre-clinical data to justify trials in humans afflicted with the disease.
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Affiliation(s)
- Brianna Dufek
- Boys Town National Research Hospital, Omaha, NE, United States of America
| | - Daniel T. Meehan
- Boys Town National Research Hospital, Omaha, NE, United States of America
| | - Duane Delimont
- Boys Town National Research Hospital, Omaha, NE, United States of America
| | - Kevin Wilhelm
- Boys Town National Research Hospital, Omaha, NE, United States of America
| | - Gina Samuelson
- Boys Town National Research Hospital, Omaha, NE, United States of America
| | - Ross Coenen
- Boys Town National Research Hospital, Omaha, NE, United States of America
| | - Jacob Madison
- Boys Town National Research Hospital, Omaha, NE, United States of America
| | - Edward Doyle
- Department of Otolaryngology, Wake Forest School of Medicine, Washington University, Saint Louis, MO, United States of America
| | - Brendan Smyth
- Department of Otolaryngology, Wake Forest School of Medicine, Washington University, Saint Louis, MO, United States of America
| | - Grady Phillips
- Department of Otolaryngology, Wake Forest School of Medicine, Washington University, Saint Louis, MO, United States of America
| | - Michael Anne Gratton
- Department of Otolaryngology, Wake Forest School of Medicine, Washington University, Saint Louis, MO, United States of America
| | - Dominic Cosgrove
- Boys Town National Research Hospital, Omaha, NE, United States of America
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17
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Kashtan CE. An update on current and potential genetic insights and diagnosis of Alport syndrome. Expert Opin Orphan Drugs 2020. [DOI: 10.1080/21678707.2020.1784722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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18
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Daiber A, Kröller-Schön S, Oelze M, Hahad O, Li H, Schulz R, Steven S, Münzel T. Oxidative stress and inflammation contribute to traffic noise-induced vascular and cerebral dysfunction via uncoupling of nitric oxide synthases. Redox Biol 2020; 34:101506. [PMID: 32371009 PMCID: PMC7327966 DOI: 10.1016/j.redox.2020.101506] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/02/2020] [Accepted: 03/10/2020] [Indexed: 02/06/2023] Open
Abstract
Environmental pollution and non-chemical stressors such as mental stress or traffic noise exposure are increasingly accepted as health risk factors with substantial contribution to chronic noncommunicable diseases (e.g. cardiovascular, metabolic and mental). Whereas the mechanisms of air pollution-mediated adverse health effects are well characterized, the mechanisms of traffic noise exposure are not completely understood, despite convincing clinical and epidemiological evidence for a significant contribution of environmental noise to overall mortality and disability. The initial mechanism of noise-induced cardiovascular, metabolic and mental disease is well defined by the „noise reaction model“ and consists of neuronal activation involving the hypothalamic-pituitary-adrenal (HPA) axis as well as the sympathetic nervous system, followed by a classical stress response via cortisol and catecholamines. Stress pathways are initiated by noise-induced annoyance and sleep deprivation/fragmentation. This review highlights the down-stream pathophysiology of noise-induced mental stress, which is based on an induction of inflammation and oxidative stress. We highlight the sources of reactive oxygen species (ROS) involved and the known targets for noise-induced oxidative damage. Part of the review emphasizes noise-triggered uncoupling/dysregulation of endothelial and neuronal nitric oxide synthase (eNOS and nNOS) and its central role for vascular dysfunction. Exposure to (traffic) noise causes non-auditory (indirect) cardiovascular and cerebral health harms via neuronal activation. Noise activates the HPA axis and sympathetic nervous system increasing levels of stress hormones, vasoconstrictors and ROS. Noise induces inflammation and stimulates several ROS sources leading to cerebral and cardiovascular oxidative damage. Noise leads to eNOS and nNOS uncoupling contributing to cardiometabolic disease and cognitive impairment.
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Affiliation(s)
- Andreas Daiber
- Center for Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany; Partner Site Rhine-Main, German Center for Cardiovascular Research (DZHK), Langenbeckstr. 1, 55131, Mainz, Germany.
| | - Swenja Kröller-Schön
- Center for Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany
| | - Matthias Oelze
- Center for Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany
| | - Omar Hahad
- Center for Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany; Partner Site Rhine-Main, German Center for Cardiovascular Research (DZHK), Langenbeckstr. 1, 55131, Mainz, Germany
| | - Huige Li
- Department of Pharmacology, University Medical Center, Mainz, Germany
| | - Rainer Schulz
- Institute of Physiology, Justus-Liebig University, Giessen, Germany
| | - Sebastian Steven
- Center for Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany
| | - Thomas Münzel
- Center for Cardiology, Molecular Cardiology, University Medical Center, Mainz, Germany; Partner Site Rhine-Main, German Center for Cardiovascular Research (DZHK), Langenbeckstr. 1, 55131, Mainz, Germany.
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19
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Dufek B, Meehan DT, Delimont D, Samuelson G, Madison J, Shi X, Boettcher F, Trosky V, Gratton MA, Cosgrove D. Pericyte abnormalities precede strial capillary basement membrane thickening in Alport mice. Hear Res 2020; 390:107935. [PMID: 32234583 DOI: 10.1016/j.heares.2020.107935] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/05/2020] [Accepted: 03/02/2020] [Indexed: 01/08/2023]
Abstract
In 129 Sv autosomal Alport mice, the strial capillary basement membranes (SCBMs) progressively thicken between 5 and 9 weeks of age resulting in a hypoxic microenvironment with metabolic stress and induction of pro-inflammatory cytokines and chemokines. These events occur concomitant with a drop in endocochlear potential and a susceptibility to noise-induced hearing loss under conditions that do not permanently affect age/strain-matched littermates. Here we aimed to gain an understanding of events that occur before the onset of SCBM thickening. Alport stria has normal thickness and shows levels of extracellular matrix (ECM) molecules in the SCBMs commensurate with wild-type mice. Hearing thresholds in the 3-week Alport mice do not differ from those of wild-type mice. We performed RNAseq analysis using RNA from stria vascularis isolated from 3-week Alport mice and wild type littermates. Data was processed using Ingenuity Pathway Analysis software and further distilled using manual procedures. RNAseq analysis revealed significant dysregulation of genes involved in cell adhesion, cell migration, formation of protrusions, and both actin and tubulin cytoskeletal dynamics. Overall, the data suggested changes in the cellular architecture of the stria might be apparent. To test this notion, we performed dual immunofluorescence analysis on whole mounts of the stria vascularis from these same animals stained with anti-isolectin gs-ib4 (endothelial cell marker) and anti-desmin (pericyte marker) antibodies. The results showed evidence of pericyte detachment and migration as well as the formation of membrane ruffling on pericytes in z-stacked confocal images from Alport mice compared to wild type littermates. This was confirmed by TEM analysis. Earlier work from our lab showed that endothelin A receptor blockade prevents SCBM thickening and ECM accumulation in the SCBMs. Treating cultured pericytes with endothelin-1 induced actin cytoskeletal rearrangement, increasing the ratio of filamentous to globular actin. Collectively, these findings suggest that the change in type IV collagen composition in the Alport SCBMs results in cellular insult to the pericyte compartment, activating detachment and altered cytoskeletal dynamics. These events precede SCBM thickening and hearing loss in Alport mice, and thus constitute the earliest event so far recognized in Alport strial pathology.
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Affiliation(s)
- Brianna Dufek
- Boys Town National Research Hospital, Omaha, NE, USA
| | | | | | | | - Jacob Madison
- Boys Town National Research Hospital, Omaha, NE, USA
| | - Xiourui Shi
- Oregon Health Science Center, Portland, OR, USA
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20
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Abstract
Discovered in 1987 as a potent endothelial cell-derived vasoconstrictor peptide, endothelin-1 (ET-1), the predominant member of the endothelin peptide family, is now recognized as a multifunctional peptide with cytokine-like activity contributing to almost all aspects of physiology and cell function. More than 30 000 scientific articles on endothelin were published over the past 3 decades, leading to the development and subsequent regulatory approval of a new class of therapeutics-the endothelin receptor antagonists (ERAs). This article reviews the history of the discovery of endothelin and its role in genetics, physiology, and disease. Here, we summarize the main clinical trials using ERAs and discuss the role of endothelin in cardiovascular diseases such as arterial hypertension, preecclampsia, coronary atherosclerosis, myocardial infarction in the absence of obstructive coronary artery disease (MINOCA) caused by spontaneous coronary artery dissection (SCAD), Takotsubo syndrome, and heart failure. We also discuss how endothelins contributes to diabetic kidney disease and focal segmental glomerulosclerosis, pulmonary arterial hypertension, as well as cancer, immune disorders, and allograft rejection (which all involve ETA autoantibodies), and neurological diseases. The application of ERAs, dual endothelin receptor/angiotensin receptor antagonists (DARAs), selective ETB agonists, novel biologics such as receptor-targeting antibodies, or immunization against ETA receptors holds the potential to slow the progression or even reverse chronic noncommunicable diseases. Future clinical studies will show whether targeting endothelin receptors can prevent or reduce disability from disease and improve clinical outcome, quality of life, and survival in patients.
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Affiliation(s)
- Matthias Barton
- From Molecular Internal Medicine, University of Zürich, Switzerland (M.B.)
- Andreas Grüntzig Foundation, Zürich, Switzerland (M.B.)
| | - Masashi Yanagisawa
- International Institute for Integrative Sleep Medicine (WPI-IIIS) and Life Science Center, Tsukuba Advanced Research Alliance, University of Tsukuba, Japan (M.Y.)
- Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX (M.Y.)
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Münzel T, Sørensen M, Schmidt F, Schmidt E, Steven S, Kröller-Schön S, Daiber A. The Adverse Effects of Environmental Noise Exposure on Oxidative Stress and Cardiovascular Risk. Antioxid Redox Signal 2018; 28:873-908. [PMID: 29350061 PMCID: PMC5898791 DOI: 10.1089/ars.2017.7118] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 11/11/2017] [Accepted: 11/14/2017] [Indexed: 12/29/2022]
Abstract
Epidemiological studies have provided evidence that traffic noise exposure is linked to cardiovascular diseases such as arterial hypertension, myocardial infarction, and stroke. Noise is a nonspecific stressor that activates the autonomous nervous system and endocrine signaling. According to the noise reaction model introduced by Babisch and colleagues, chronic low levels of noise can cause so-called nonauditory effects, such as disturbances of activity, sleep, and communication, which can trigger a number of emotional responses, including annoyance and subsequent stress. Chronic stress in turn is associated with cardiovascular risk factors, comprising increased blood pressure and dyslipidemia, increased blood viscosity and blood glucose, and activation of blood clotting factors, in animal models and humans. Persistent chronic noise exposure increases the risk of cardiometabolic diseases, including arterial hypertension, coronary artery disease, diabetes mellitus type 2, and stroke. Recently, we demonstrated that aircraft noise exposure during nighttime can induce endothelial dysfunction in healthy subjects and is even more pronounced in coronary artery disease patients. Importantly, impaired endothelial function was ameliorated by acute oral treatment with the antioxidant vitamin C, suggesting that excessive production of reactive oxygen species contributes to this phenomenon. More recently, we introduced a novel animal model of aircraft noise exposure characterizing the underlying molecular mechanisms leading to noise-dependent adverse oxidative stress-related effects on the vasculature. With the present review, we want to provide an overview of epidemiological, translational clinical, and preclinical noise research addressing the nonauditory, adverse effects of noise exposure with focus on oxidative stress. Antioxid. Redox Signal. 28, 873-908.
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Affiliation(s)
- Thomas Münzel
- The Center for Cardiology, Cardiology 1, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Mette Sørensen
- Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Frank Schmidt
- The Center for Cardiology, Cardiology 1, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Erwin Schmidt
- Institute for Molecular Genetics, Johannes Gutenberg University, Mainz, Germany
| | - Sebastian Steven
- The Center for Cardiology, Cardiology 1, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Swenja Kröller-Schön
- The Center for Cardiology, Cardiology 1, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Andreas Daiber
- The Center for Cardiology, Cardiology 1, Johannes Gutenberg University Medical Center, Mainz, Germany
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Abstract
In this commentary, I review recent advances in Alport syndrome genetics, diagnostics, and therapeutics. I also offer some opinions regarding strategies to optimize the early identification of affected individuals to promote early therapeutic intervention.
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Affiliation(s)
- Clifford Kashtan
- Department of Pediatrics, Division of Pediatric Nephrology, University of Minnesota Medical School, Minneapolis, MN, USA
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