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Liang J, Wang J, Yao W, Zhou L, Huang X. Behavioral characteristics in sensing mechanism of the Corti. Comput Struct Biotechnol J 2023; 21:1797-1806. [PMID: 36915377 PMCID: PMC10006463 DOI: 10.1016/j.csbj.2023.02.030] [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: 09/12/2022] [Revised: 02/16/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023] Open
Abstract
Some experiments can't be realized because the cochlea's Corti is the most delicate and complex sensory organ. In this paper, some typical and special behavioral characteristics in the process of sensation were found in medical clinic. Based on the interdisciplinary principles of medicine, physics and biology, a real numerical simulation model of Corti is established. On the basis of verifying the correctness of the model, the mechanism corresponding to these typical and special behavior characteristics in the process of sensation is explored through simulation calculation and analysis. This study provides theoretical and applied basis for people to better understand the sound sensing mechanism, and provides a numerical simulation platform for further analyzing Corti's sensing mechanism and good clinical application.
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Affiliation(s)
- Junyi Liang
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44106, USA
| | - Jiakun Wang
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai 200072, PR China
| | - Wenjuan Yao
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai 200072, PR China
- Corresponding authors.
| | - Lei Zhou
- Department of Otorhinolaryngology, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China
| | - Xinsheng Huang
- Department of Otorhinolaryngology, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China
- Corresponding authors.
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ZHAO ZHENGSHAN, YAO WENJUAN, WANG JIAKUN, ZHOU LEI, HUANG XINSHENG. MECHANISM OF SENSORINEURAL HEARING LOSS CAUSED BY TYPICAL SCLEROSIS OF COCHLEA. J MECH MED BIOL 2021. [DOI: 10.1142/s0219519422500026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
It is difficult to measure the cochlea directly because of the ethical problems and the complexity of cochlear structure. Therefore, finite element model (FEM) can be used as an effective alternative research method. An accurate FEM of the human ear can not only help people understand the mechanisms of sound transmission, but also effectively assess the effects of otologic diseases and guide research on the treatment of hearing loss. In this paper, a three-dimensional (3D) FEM of the human normal cochlea is proposed to study the changes in the biomechanical behavior of the cochlear sensory structure caused by the anterior fissure sclerosis and bottom-turn and apex-turn ossification of the cochlear window. The degree and harm of hearing loss caused by diseases are quantitatively predicted, which can deepen the understanding of the biomechanical mechanism of cochlea, and provide theoretical basis for clinical medicine.
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Affiliation(s)
- ZHENGSHAN ZHAO
- School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, P. R. China
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai 200072, P. R. China
| | - WENJUAN YAO
- School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, P. R. China
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai 200072, P. R. China
| | - JIAKUN WANG
- School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, P. R. China
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai 200072, P. R. China
| | - LEI ZHOU
- Otorhinolaryngology-Head and Neck Surgery Department, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, P. R. China
| | - XINSHENG HUANG
- Otorhinolaryngology-Head and Neck Surgery Department, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, P. R. China
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Pyykkö I, Zou J, Schrott-Fischer A, Glueckert R, Kinnunen P. An Overview of Nanoparticle Based Delivery for Treatment of Inner Ear Disorders. Methods Mol Biol 2016; 1427:363-415. [PMID: 27259938 DOI: 10.1007/978-1-4939-3615-1_21] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Nanoparticles offer new possibilities for inner ear treatment as they can carry a variety of drugs, protein, and nucleic acids to inner ear. Nanoparticles are equipped with several functions such as targetability, immuno-transparency, biochemical stability, and ability to be visualized in vivo and in vitro. A group of novel peptides can be attached to the surface of nanoparticles that will enhance the cell entry, endosomal escape, and nuclear targeting. Eight different types of nanoparticles with different payload carrying strategies are available now. The transtympanic delivery of nanoparticles indicates that, depending on the type of nanoparticle, different migration pathways into the inner ear can be employed, and that optimal carriers can be designed according to the intended cargo. The use of nanoparticles as drug/gene carriers is especially attractive in conjunction with cochlear implantation or even as an inclusion in the implant as a drug/gene reservoir.
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Affiliation(s)
- Ilmari Pyykkö
- Department of Otolaryngology, University of Tampere and University Hospital of Tampere, Tampere, 33014, Finland. .,Hearing and Balance Research Unit, Field of Otolaryngology, School of Medicine, University of Tampere, Medisiinarinkatu 3, Tampere, 33520, Finland.
| | - Jing Zou
- BECS, Department of Biomedical Engineering and Computational Science, Aalto University, Aalto, 02150, Espoo, Finland
| | - Annelies Schrott-Fischer
- Department of Otolaryngology, Medical University of Innsbruck, Anichstrasse 35, Innsbruck, 6020, Austria
| | - Rudolf Glueckert
- Department of Otolaryngology, Medical University of Innsbruck, Anichstrasse 35, Innsbruck, 6020, Austria
| | - Paavo Kinnunen
- BECS, Department of Biomedical Engineering and Computational Science, Aalto University, Aalto, Finland
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Oiticica J, Barboza-Junior LCM, Batissoco AC, Lezirovitz K, Mingroni-Netto RC, Haddad LA, Bento RF. Retention of progenitor cell phenotype in otospheres from guinea pig and mouse cochlea. J Transl Med 2010; 8:119. [PMID: 21087511 PMCID: PMC3001427 DOI: 10.1186/1479-5876-8-119] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2010] [Accepted: 11/18/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Culturing otospheres from dissociated organ of Corti is an appropriate starting point aiming at the development of cell therapy for hair cell loss. Although guinea pigs have been widely used as an excellent experimental model for studying the biology of the inner ear, the mouse cochlea has been more suitable for yielding otospheres in vitro. The aim of this study was to compare conditions and outcomes of otosphere suspension cultures from dissociated organ of Corti of either mouse or guinea pig at postnatal day three (P3), and to evaluate the guinea pig as a potential cochlea donor for preclinical cell therapy. METHODS Organs of Corti were surgically isolated from P3 guinea pig or mouse cochlea, dissociated and cultivated under non-adherent conditions. Cultures were maintained in serum-free DMEM:F12 medium, supplemented with epidermal growth factor (EGF) plus either basic fibroblast growth factor (bFGF) or transforming growth factor alpha (TGFα). Immunofluorescence assays were conducted for phenotype characterization. RESULTS The TGFα group presented a number of spheres significantly higher than the bFGF group. Although mouse cultures yielded more cells per sphere than guinea pig cultures, sox2 and nestin distributed similarly in otosphere cells from both organisms. We present evidence that otospheres retain properties of inner ear progenitor cells such as self-renewal, proliferation, and differentiation into hair cells or supporting cells. CONCLUSIONS Dissociated guinea pig cochlea produced otospheres in vitro, expressing sox2 and nestin similarly to mouse otospheres. Our data is supporting evidence for the presence of inner ear progenitor cells in the postnatal guinea pig. However, there is limited viability for these cells in neonatal guinea pig cochlea when compared to the differentiation potential observed for the mouse organ of Corti at the same developmental stage.
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Affiliation(s)
- Jeanne Oiticica
- Department of Otolaryngology, Medical School, University of São Paulo, São Paulo, Brasil.
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Wei–ning S, Li–dong Z, Xiao–bing Z, Shi–ming Y. The progenitors of inner ear hair cells and their regulating genes. J Otol 2010. [DOI: 10.1016/s1672-2930(10)50007-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Abstract
PURPOSE OF REVIEW In evaluating strategies to preserve or regenerate the cochlea, understanding the process of labyrinthine injury on a cellular and molecular level is crucial. Examination of inner ear injury reveals mechanism-specific types of damage, often at specific areas within the cochlea. Site-specific interventions can then be considered. RECENT FINDINGS The review will briefly summarize the historical perspective of advancements in hearing science through 2006. Areas of research covered include hair cell protection, hair cell regeneration, spiral ganglion cell regeneration, and stria vascularis metabolic regulation. SUMMARY The review will briefly summarize the early development of a few such site-specific interventions for inner ear functional rehabilitation, for work done prior to 2006. The outstanding reviews of cutting edge research from this year's and last year's Hearing Science section of Current Opinion in Otolaryngology - Head and Neck Surgery can then be understood and appreciated in a more informed manner.
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Batts SA, Shoemaker CR, Raphael Y. Notch signaling and Hes labeling in the normal and drug-damaged organ of Corti. Hear Res 2009; 249:15-22. [PMID: 19185606 PMCID: PMC2796274 DOI: 10.1016/j.heares.2008.12.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2008] [Revised: 12/19/2008] [Accepted: 12/30/2008] [Indexed: 12/01/2022]
Abstract
During the development of the inner ear, the Notch cell signaling pathway is responsible for the specification of the pro-sensory domain and influences cell fate decisions. It is assumed that Notch signaling ends during maturity and cannot be reinitiated to alter the fate of new or existing cells in the organ of Corti. This is in contrast to non-mammalian species which reinitiate Delta 1-Notch1 signaling in response to trauma in the auditory epithelium, resulting in hair cell regeneration through transdifferentiation and/or mitosis. We report immunohistochemical data and Western protein analysis showing that in the aminoglycoside-damaged guinea pig organ of Corti, there is an increase in proteins involved in Notch activation occurring within 24h of a chemical hair cell lesion. The signaling response is characterized by the increased presence of Jagged1 ligand in pillar and Deiters cells, Notch1 signal in surviving supporting cell nuclei, and the absence of Jagged2 and Delta-like1. The pro-sensory bHLH protein Atoh1 was absent at all time points following an ototoxic lesion, while the repressor bHLH transcription factors Hes1 and Hes5 were detected in surviving supporting cell nuclei in the former inner and outer hair cell areas, respectively. Notch pathway proteins peaked at 2 weeks, decreased at 1 month, and nearly disappeared by 2 months. These results indicate that the mammalian auditory epithelium retains the ability to regulate Notch signaling and Notch-dependent Hes activity in response to cellular trauma and that the signaling is transient. Additionally, since Hes activity antagonizes the transcription of pro-sensory Atoh1, the presence of Hes after a lesion may prohibit the occurrence of transdifferentiation in the surviving supporting cells.
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Affiliation(s)
- Shelley A. Batts
- Kresge Hearing Research Institute, University of Michigan, Ann Arbor, Michigan, USA
- Neuroscience Program, University of Michigan, Ann Arbor, Michigan, USA
| | | | - Yehoash Raphael
- Kresge Hearing Research Institute, University of Michigan, Ann Arbor, Michigan, USA
- Neuroscience Program, University of Michigan, Ann Arbor, Michigan, USA
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Tian Y, James S, Zuo J, Fritzsch B, Beisel KW. Conditional and inducible gene recombineering in the mouse inner ear. Brain Res 2006; 1091:243-54. [PMID: 16488403 PMCID: PMC3901521 DOI: 10.1016/j.brainres.2006.01.040] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2005] [Revised: 12/30/2005] [Accepted: 01/05/2006] [Indexed: 12/21/2022]
Abstract
Genetically engineered mice have greatly improved our understanding of gene functions and disease mechanisms. Nevertheless, the traditional knock-out approach has limitations in the overall viability of mutants. The application of the Cre/loxP system in the inner ear can help bypass this difficulty by generation of conditional gene recombineering. However, to do so requires an expression system that allows ear-specific temporally inducible, gene abrogation of one or more of the increasingly available floxed genes. To date, three approaches have been successfully used to create murine inner ear-specific Cre lines: conventional transgenesis, BAC transgenesis, and gene knock-in. Unfortunately, timing of conditional Cre activity does not extend beyond the regulatory range of the gene controlling Cre expression. Rectification of this problem requires the generation of tamoxifen or tetracycline inducible systems in the inner ear. Examination of integrase expression at different loci will facilitate studies on the expression of exogenous transgenes. These genetic applications for the mouse genome will dramatically advance in vivo gene function studies.
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Affiliation(s)
- Yong Tian
- Department of Developmental Neurobiology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
| | - Sally James
- Department of Developmental Neurobiology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
| | - Jian Zuo
- Department of Developmental Neurobiology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
| | - Bernd Fritzsch
- Department of Biomedical Sciences, Creighton University, School of Medicine, 2500 California Plaza, Omaha, NE 68178, USA
| | - Kirk W. Beisel
- Department of Biomedical Sciences, Creighton University, School of Medicine, 2500 California Plaza, Omaha, NE 68178, USA
- Corresponding author: Fax: +1 402 280 2690. (K.W. Beisel)
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