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Yildiz E, Gadenstaetter AJ, Gerlitz M, Landegger LD, Liepins R, Nieratschker M, Glueckert R, Staecker H, Honeder C, Arnoldner C. Investigation of inner ear drug delivery with a cochlear catheter in piglets as a representative model for human cochlear pharmacokinetics. Front Pharmacol 2023; 14:1062379. [PMID: 36969846 PMCID: PMC10034346 DOI: 10.3389/fphar.2023.1062379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 02/27/2023] [Indexed: 03/12/2023] Open
Abstract
Hearing impairment is the most common sensory disorder in humans, and yet hardly any medications are licensed for the treatment of inner ear pathologies. Intricate pharmacokinetic examinations to better understand drug distribution within this complex organ could facilitate the development of novel therapeutics. For such translational research projects, animal models are indispensable, but differences in inner ear dimensions and other anatomical features complicate the transfer of experimental results to the clinic. The gap between rodents and humans may be bridged using larger animal models such as non-human primates. However, their use is challenging and impeded by administrative, regulatory, and financial hurdles. Other large animal models with more human-like inner ear dimensions are scarce. In this study, we analyzed the inner ears of piglets as a potential representative model for the human inner ear and established a surgical approach for intracochlear drug application and subsequent apical sampling. Further, controlled intracochlear delivery of fluorescein isothiocyanate-dextran (FITC-d) was carried out after the insertion of a novel, clinically applicable CE-marked cochlear catheter through the round window membrane. Two, six, and 24 hours after a single injection with this device, the intracochlear FITC-d distribution was determined in sequential perilymph samples. The fluorometrically assessed concentrations two hours after injection were compared to the FITC-d content in control groups, which either had been injected with a simple needle puncture through the round window membrane or the cochlear catheter in combination with a stapes vent hole. Our findings demonstrate not only significantly increased apical FITC-d concentrations when using the cochlear catheter but also higher total concentrations in all perilymph samples. Additionally, the concentration decreased after six and 24 hours and showed a more homogenous distribution compared to shorter observation times.
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Affiliation(s)
- Erdem Yildiz
- Christian Doppler Laboratory for Inner Ear Research, Department of Otorhinolaryngology, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
- Department of Otorhinolaryngology, Head and Neck Surgery, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
| | - Anselm J. Gadenstaetter
- Christian Doppler Laboratory for Inner Ear Research, Department of Otorhinolaryngology, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
- Department of Otorhinolaryngology, Head and Neck Surgery, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
| | - Matthias Gerlitz
- Christian Doppler Laboratory for Inner Ear Research, Department of Otorhinolaryngology, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
- Department of Otorhinolaryngology, Head and Neck Surgery, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
| | - Lukas D. Landegger
- Christian Doppler Laboratory for Inner Ear Research, Department of Otorhinolaryngology, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
- Department of Otorhinolaryngology, Head and Neck Surgery, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
| | - Rudolfs Liepins
- Department of Otorhinolaryngology, Head and Neck Surgery, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
| | - Michael Nieratschker
- Christian Doppler Laboratory for Inner Ear Research, Department of Otorhinolaryngology, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
- Department of Otorhinolaryngology, Head and Neck Surgery, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
| | - Rudolf Glueckert
- Department of Otorhinolaryngology, Medical University of Innsbruck, Innsbruck, Austria
| | - Hinrich Staecker
- Department of Otolaryngology, Head and Neck Surgery, University of Kansas School of Medicine, Kansas, KS, United States
| | - Clemens Honeder
- Christian Doppler Laboratory for Inner Ear Research, Department of Otorhinolaryngology, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
- Department of Otorhinolaryngology, Head and Neck Surgery, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
| | - Christoph Arnoldner
- Christian Doppler Laboratory for Inner Ear Research, Department of Otorhinolaryngology, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
- Department of Otorhinolaryngology, Head and Neck Surgery, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
- *Correspondence: Christoph Arnoldner,
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2
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Sox10 Gene Is Required for the Survival of Saccular and Utricular Hair Cells in a Porcine Model. Mol Neurobiol 2022; 59:3323-3335. [DOI: 10.1007/s12035-021-02691-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 12/08/2021] [Indexed: 10/18/2022]
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3
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Peter MS, Warnecke A, Staecker H. A Window of Opportunity: Perilymph Sampling from the Round Window Membrane Can Advance Inner Ear Diagnostics and Therapeutics. J Clin Med 2022; 11:jcm11020316. [PMID: 35054010 PMCID: PMC8781055 DOI: 10.3390/jcm11020316] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 12/29/2021] [Accepted: 01/06/2022] [Indexed: 12/12/2022] Open
Abstract
In the clinical setting, the pathophysiology of sensorineural hearing loss is poorly defined and there are currently no diagnostic tests available to differentiate between subtypes. This often leaves patients with generalized treatment options such as steroids, hearing aids, or cochlear implantation. The gold standard for localizing disease is direct biopsy or imaging of the affected tissue; however, the inaccessibility and fragility of the cochlea make these techniques difficult. Thus, the establishment of an indirect biopsy, a sampling of inner fluids, is needed to advance inner ear diagnostics and allow for the development of novel therapeutics for inner ear disease. A promising source is perilymph, an inner ear liquid that bathes multiple structures critical to sound transduction. Intraoperative perilymph sampling via the round window membrane of the cochlea has been successfully used to profile the proteome, metabolome, and transcriptome of the inner ear and is a potential source of biomarker discovery. Despite its potential to provide insight into inner ear pathologies, human perilymph sampling continues to be controversial and is currently performed only in conjunction with a planned procedure where the inner ear is opened. Here, we review the safety of procedures in which the inner ear is opened, highlight studies where perilymph analysis has advanced our knowledge of inner ear diseases, and finally propose that perilymph sampling could be done as a stand-alone procedure, thereby advancing our ability to accurately classify sensorineural hearing loss.
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Affiliation(s)
- Madeleine St. Peter
- Department of Otolaryngology-Head & Neck Surgery, University of Kansas Medical Center, Kansas City, KS 66160, USA;
| | - Athanasia Warnecke
- Department of Otolaryngology Head and Neck Surgery, Hannover Medical School, D-30625 Hanover, Germany;
| | - Hinrich Staecker
- Department of Otolaryngology-Head & Neck Surgery, University of Kansas Medical Center, Kansas City, KS 66160, USA;
- Correspondence:
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4
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Gu X, Jiang Q, Sun W, Guo W, Yang S. Anatomical analysis of vestibular aqueducts in humans and miniature pigs. Anat Rec (Hoboken) 2021. [DOI: 10.1002/ar.24577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiang Gu
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital Beijing China
- Department of Otolayngology, Head & Neck Surgery, The Tianjin Children's Hospital Tianjin P.R. China
- State Key Lab of Hearing Science Ministry of Education Beijing China
- Department of Otolaryngeal‐Head Neck Surgery, Chinese PLA General Hospital Beijing P.R. China
- Chinese PLA Medical School Beijing China
| | - Qing‐qing Jiang
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital Beijing China
- Department of Otolayngology, Head & Neck Surgery, The Tianjin Children's Hospital Tianjin P.R. China
- State Key Lab of Hearing Science Ministry of Education Beijing China
- Department of Otolaryngeal‐Head Neck Surgery, Chinese PLA General Hospital Beijing P.R. China
- Chinese PLA Medical School Beijing China
| | - Wei Sun
- Department of Communicative Disorders & Sciences, Center for Hearing and Deafness State University of New York at Buffalo New York USA
| | - Weiwei Guo
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital Beijing China
- Department of Otolayngology, Head & Neck Surgery, The Tianjin Children's Hospital Tianjin P.R. China
- State Key Lab of Hearing Science Ministry of Education Beijing China
- Department of Otolaryngeal‐Head Neck Surgery, Chinese PLA General Hospital Beijing P.R. China
- Chinese PLA Medical School Beijing China
| | - Shi‐Ming Yang
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital Beijing China
- Department of Otolayngology, Head & Neck Surgery, The Tianjin Children's Hospital Tianjin P.R. China
- State Key Lab of Hearing Science Ministry of Education Beijing China
- Department of Otolaryngeal‐Head Neck Surgery, Chinese PLA General Hospital Beijing P.R. China
- Chinese PLA Medical School Beijing China
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5
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Zhang XB, Yang SM. Viewing the current situation of pig model application in China's medical field from the application and funding of NSFC. J Otol 2020; 16:34-39. [PMID: 33505448 PMCID: PMC7814078 DOI: 10.1016/j.joto.2020.10.004] [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: 05/08/2020] [Revised: 10/23/2020] [Accepted: 10/27/2020] [Indexed: 11/29/2022] Open
Abstract
Background The National Natural Science Foundation of China (NSFC) is an important part of China’s innovation system. In the last decade, the pig has become more and more widely used in the field of medical science, especially in otology research. Objective By analyzing and summarizing the funding information over recent years, we intend to identify the characteristics and trends of funding for research using pig models and provide references for future development. Material and methods This is a comprehensive analysis of features in funding for research projects involving pig models by the NSFC in the past 10 years, with a focus on projects in the field of otolaryngology/head and neck surgery. Results Both the number and amount of funding provided by the NSFC for research involving pig models are on the rise with each passing year. Researchers at the PLA General Hospital have completed a number of studies using miniature pigs in cochlear morphology, electrophysiology, cochlear implantation, cochlear transcription analysis, gene therapy, inner ear disease modeling and Eustachian tube pathology modeling. Conclusion Pigs as an ideal large mammal model are well suited in the current national basic research strategy in China, and can help further strengthen China’s leading position in basic research in the world.
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Affiliation(s)
- Xiao Bin Zhang
- Department of Health Sciences, National Natural Science Foundation of China, China
| | - Shi-Ming Yang
- College of Otolaryngology Head and Neck Surgery, Chinese PLA General Hospital, Chinese PLA Medical School, No. 28 Fuxing Road, Beijing, 100853, China.,National Clinical Research Center for Otolaryngologic Diseases, Beijing, 100853, China.,State Key Lab of Hearing Science, Ministry of Education, Beijing, 100853, China.,Beijing Key Lab of Hearing Impairment Prevention and Treatment, Beijing, 100853, China
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6
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Ji XJ, Chen W, Wang X, Zhang Y, Liu Q, Guo WW, Zhao JG, Yang SM. Canalostomy is an ideal surgery route for inner ear gene delivery in big animal model. Acta Otolaryngol 2019; 139:939-947. [PMID: 31486693 DOI: 10.1080/00016489.2019.1654130] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Background: Inner gene therapy offers great promises as a potential treatment for hearing loss. Aims/objectives: One of the critical determinants of the success of inner ear gene therapy is to find a delivery method which results in consistent transduction efficiency of targeted cell types while minimizing hearing loss. Material and methods: Surgery was performed only in the right ear of each Bama miniature pig, and the left ear served as a control. The gene delivery to inner ear via round window membrane (RWM) and posterior semicircular canal (PSC) approach was performed with the viral vector AAV1-CMV-GFP. Results: The gene delivery through RWM and the PSC (canalostomy) is able to perfuse the inner ear. Conclusions and significance: The easy anatomic identification of the PSC, as to RWM, as well as minimal manipulation of the temporal bone required, make this surgical approach an attractive option for inner ear gene delivery in big animal model.
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Affiliation(s)
- Xiao-Jun Ji
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA Medical School, Institute of Otolaryngology, Chinese PLA General Hospital
| | - Wei Chen
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA Medical School, Institute of Otolaryngology, Chinese PLA General Hospital
| | - Xiao Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Yue Zhang
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA Medical School, Institute of Otolaryngology, Chinese PLA General Hospital
| | - Qian Liu
- Department of Otolaryngology, Affiliated First Hospital, Fujian Medical University, Fuzhou, China
| | - Wei-Wei Guo
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA Medical School, Institute of Otolaryngology, Chinese PLA General Hospital
| | - Jian-Guo Zhao
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Shi-Ming Yang
- Department of Otolaryngology, Head and Neck Surgery, Chinese PLA Medical School, Institute of Otolaryngology, Chinese PLA General Hospital
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7
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A miR-511-binding site SNP in the 3'UTR of IGF-1 gene is associated with proliferation and apoptosis of PK-15 cells. In Vitro Cell Dev Biol Anim 2019; 55:323-330. [PMID: 30945114 DOI: 10.1007/s11626-019-00329-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 01/28/2019] [Indexed: 01/07/2023]
Abstract
Insulin-like growth factor-1 (IGF-1) is a functional candidate gene for pig growth and development due to its crucial role in the growth axis of growth hormone-IGF-1. Considering that the 3' untranslated region (3'UTR) of gene may affect its expression, we analyzed the effect of a single-nucleotide polymorphism (SNP) (rs34142920, c.674C > T) on gene expression, cell proliferation, and apoptosis and the possible related molecular mechanisms in PK-15 cells. The SNP was found in the 3'UTR of IGF-1 in Bama Xiang pig in previous investigations. Results showed that the SNP was located at the target site binding to microRNA (miR-511). The 3'UTR of IGF-1 gene with C allele significantly downregulated the expression of IGF-1 gene compared with that of the gene with T allele by luciferase assay. miR-511 was transfected into porcine kidney cell line (PK-15 cells) to reveal its effects on cells and whether or not it targets IGF-1. The expression levels of IGF-1 at mRNA and protein levels were remarkably downregulated. miR-511 significantly inhibited cell proliferation and promoted cell apoptosis by downregulating the phosphorylation level of AKT and ERK1/2. This finding confirmed that miR-511 inhibits proliferation and promotes apoptosis by downregulating the IGF-1 in PK-15 cells.
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8
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Knoll RM, Reinshagen KL, Barber SR, Ghanad I, Swanson R, Smith DH, Abdullah KG, Jung DH, Remenschneider AK, Kozin ED. High Resolution Computed Tomography Atlas of the Porcine Temporal Bone and Skull Base: Anatomical Correlates for Traumatic Brain Injury Research. J Neurotrauma 2019; 36:1029-1039. [PMID: 29969939 PMCID: PMC8349728 DOI: 10.1089/neu.2018.5808] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Brain injuries are a significant cause of morbidity and mortality worldwide. Auditory and vestibular dysfunction may occur following trauma to the temporal bone (TB), including the lateral skull base. The porcine model is a commonly used large animal model for investigating brain injury. Reports detailing porcine TB anatomy based on high resolution computed tomography (HRCT) imaging, however, are limited. Herein, we employ HRCT to evaluate and describe the bony anatomy of the porcine TB and lateral skull base. High-resolution multi-detector and cone beam CT were used to image porcine TBs (n = 16). TBs were analyzed for major anatomical structures and compared to human species. Porcine temporal bone anatomy was readily identifiable by HRCT. Although some variability exists, the ossicular chain, vestibule, cochlea, course of the facial nerve, and skull base are similar to those of humans. Major differences included position of the external auditory canal and mastoid, as well as presence of the petrous carotid canal. Study findings may serve as an atlas to evaluate the porcine middle and inner ear, as well as lateral skull base injuries for future porcine brain injury models or other studies that require CT-based analysis.
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Affiliation(s)
- Renata M. Knoll
- Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts
- Department of Otolaryngology, Massachusetts Eye and Ear, Boston, Massachusetts
| | | | - Samuel R. Barber
- Department of Otolaryngology-Head and Neck Surgery, University of Arizona College of Medicine, Tucson, Arizona
| | - Iman Ghanad
- Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts
- Department of Otolaryngology, Massachusetts Eye and Ear, Boston, Massachusetts
| | - Randel Swanson
- Department of Physical Medicine and Rehabilitation, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Douglas H. Smith
- Department of Neurosurgery, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Kalil G. Abdullah
- Department of Neurosurgery, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | - David H. Jung
- Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts
- Department of Otolaryngology, Massachusetts Eye and Ear, Boston, Massachusetts
| | - Aaron K. Remenschneider
- Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts
- Department of Otolaryngology, Massachusetts Eye and Ear, Boston, Massachusetts
| | - Elliott D. Kozin
- Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts
- Department of Otolaryngology, Massachusetts Eye and Ear, Boston, Massachusetts
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9
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An FW, Yuan H, Guo W, Hou ZH, Cai JM, Luo CC, Yu N, Jiang QQ, Cheng W, Liu W, Yang SM. Establishment of a Large Animal Model for Eustachian Tube Functional Study in Miniature Pigs. Anat Rec (Hoboken) 2019; 302:1024-1038. [PMID: 30779320 DOI: 10.1002/ar.24098] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 10/14/2018] [Accepted: 11/10/2018] [Indexed: 12/21/2022]
Abstract
This study was performed to investigate whether miniature pigs are a suitable animal model for studies of the Eustachian tube (ET). Sixteen Chinese experimental miniature pigs were used in this investigation. Ten animals were used for anatomical and morphometric analyses to obtain qualitative and quantitative information regarding the ET. Three animals were used for histological analysis to determine the fine structure of ET cross-sections. Three animals were used to investigate the feasibility of balloon dilation of the Eustachian tube (BDET). The anatomical study indicated that the pharyngeal orifice and tympanic orifice of the miniature pig ET are located at the posterior end of the nasal lateral wall and anterior wall of the middle ear cavity, respectively. The cartilaginous tube was seen to pass through the whole length of the ET, the length of the cartilaginous part of the ET and the diameter of the isthmus were similar between humans and miniature pigs. The inclination of the ET in miniature pigs was larger than that in humans. The gross histology seemed to be slightly different between miniature pig and human, but the fine structures were essentially the same in both species. BDET experiments verified that the miniature pig model is suitable as a model for clinical operations. The miniature pig ET corresponds very well to that of humans. In addition, the miniature pig ET is suitable as a model for clinical operations. Therefore, the miniature pig is a valid animal model for ET study. Anat Rec, 302:1024-1038, 2019. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Feng-Wei An
- Department of Otolaryngology and Head Neck Surgery, Chinese PLA General Hospital, Beijing, China.,Key Lab of Hearing Impairment Science of Ministry of Education, Key Lab of Hearing Impairment Prevention and Treatment of Beijing City, Chinese PLA Medical School, Beijing, China
| | - Hu Yuan
- Department of Otolaryngology and Head Neck Surgery, Chinese PLA General Hospital, Beijing, China.,Key Lab of Hearing Impairment Science of Ministry of Education, Key Lab of Hearing Impairment Prevention and Treatment of Beijing City, Chinese PLA Medical School, Beijing, China
| | - Weiwei Guo
- Department of Otolaryngology and Head Neck Surgery, Chinese PLA General Hospital, Beijing, China.,Key Lab of Hearing Impairment Science of Ministry of Education, Key Lab of Hearing Impairment Prevention and Treatment of Beijing City, Chinese PLA Medical School, Beijing, China
| | - Zhao-Hui Hou
- Department of Otolaryngology and Head Neck Surgery, Chinese PLA General Hospital, Beijing, China.,Key Lab of Hearing Impairment Science of Ministry of Education, Key Lab of Hearing Impairment Prevention and Treatment of Beijing City, Chinese PLA Medical School, Beijing, China
| | - Jian-Ming Cai
- Department of Radiology, Chinese PLA General Hospital, Beijing, China
| | - Chun-Cai Luo
- Department of Radiology, Chinese PLA General Hospital, Beijing, China
| | - Ning Yu
- Department of Otolaryngology and Head Neck Surgery, Chinese PLA General Hospital, Beijing, China.,Key Lab of Hearing Impairment Science of Ministry of Education, Key Lab of Hearing Impairment Prevention and Treatment of Beijing City, Chinese PLA Medical School, Beijing, China
| | - Qing-Qing Jiang
- Department of Otolaryngology and Head Neck Surgery, Chinese PLA General Hospital, Beijing, China.,Key Lab of Hearing Impairment Science of Ministry of Education, Key Lab of Hearing Impairment Prevention and Treatment of Beijing City, Chinese PLA Medical School, Beijing, China
| | - Wei Cheng
- Department of Otolaryngology and Head Neck Surgery, Chinese PLA General Hospital, Beijing, China.,Key Lab of Hearing Impairment Science of Ministry of Education, Key Lab of Hearing Impairment Prevention and Treatment of Beijing City, Chinese PLA Medical School, Beijing, China
| | - Wei Liu
- Department of Surgical Sciences, Section of Otolaryngology Head and Neck Surgery, Uppsala University Hospital, Uppsala, Sweden.,Department of Otolaryngology, Uppsala University Hospital, Uppsala, Sweden
| | - Shi-Ming Yang
- Key Lab of Hearing Impairment Science of Ministry of Education, Key Lab of Hearing Impairment Prevention and Treatment of Beijing City, Chinese PLA Medical School, Beijing, China
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10
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Guo W, Yi H, Yan Z, Ren L, Chen L, Zhao LD, Ning Y, He DZZ, Yang SM. The morphological and functional development of the stria vascularis in miniature pigs. Reprod Fertil Dev 2018; 29:585-593. [PMID: 28442065 DOI: 10.1071/rd15183] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 08/29/2015] [Indexed: 11/23/2022] Open
Abstract
The purpose of this study was to examine the morphological and functional development of the lateral wall of the scala media of the cochlea in miniature pigs; light and transmission electron microscopy and electrophysiology were used for this purpose. We showed that the lateral wall of the scala media of the cochlea appears at embryonic Day 21 (E21) when the cochlear duct begins to form. From E28 to E49, the lateral wall can be distinguished according to its position along the cochlea. At E56, cells in the lateral wall begin to differentiate into three different types. At E70, three cell types, marginal, intermediate and basal, can be clearly distinguished. At E91, the stria vascularis is adult-like and the organ of Corti is also morphologically mature. The average endocochlear potential measured from the second turn of the cochlea (at E98, postnatal Day 1 (P1), P13 and P30) was 71.4±2.5 (n=7), 78.8±1.5 (n=10), 77.3±2.3 (n=10) and 78.0±2.1 mV (n=10), respectively. Our results suggest that in miniature pigs the stria vascularis develops during the embryonic period, concurrent with maturation of the organ of Corti. The magnitude of the endocochlear potential reached its mature level when the stria vascularis was morphologically adult-like at E98. These findings provide a morphological and functional basis for future animal studies using the miniature pig model concerning the pathogenesis of various inner-ear diseases.
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Affiliation(s)
- Weiwei Guo
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otolaryngology of PLA, Chinese PLA General Hospital, No. 28, FuXing Road, Haidian District, Beijing 100853, China
| | - Haijin Yi
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otolaryngology of PLA, Chinese PLA General Hospital, No. 28, FuXing Road, Haidian District, Beijing 100853, China
| | - Zhang Yan
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otolaryngology of PLA, Chinese PLA General Hospital, No. 28, FuXing Road, Haidian District, Beijing 100853, China
| | - Lili Ren
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otolaryngology of PLA, Chinese PLA General Hospital, No. 28, FuXing Road, Haidian District, Beijing 100853, China
| | - Lei Chen
- State Key Laboratory for Agro-Biotechnology, China Agricultural University, No. 17, Tsinghua East Road, Haidian District, Beijing 100083, China
| | - Li Dong Zhao
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otolaryngology of PLA, Chinese PLA General Hospital, No. 28, FuXing Road, Haidian District, Beijing 100853, China
| | - Yu Ning
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otolaryngology of PLA, Chinese PLA General Hospital, No. 28, FuXing Road, Haidian District, Beijing 100853, China
| | - David Z Z He
- Department of Biomedical Sciences, Creighton University School of Medicine, 2500 California Plaza, Omaha, NE 68178, USA
| | - Shi-Ming Yang
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otolaryngology of PLA, Chinese PLA General Hospital, No. 28, FuXing Road, Haidian District, Beijing 100853, China
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11
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Wang Q, Zhang Y, Guo W, Liu Y, Wei H, Yang S. Transcription analysis of cochlear development in minipigs. Acta Otolaryngol 2017; 137:1166-1173. [PMID: 28715930 DOI: 10.1080/00016489.2017.1341641] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
CONCLUSIONS The critical stage for cochlear gene regulation in the embryo is E49-E56. These data provide a valuable resource to help elucidate gene regulation in cochlear development and will benefit ear-related studies, especially those that focus on gene and stem cell therapies in hearing loss. OBJECTIVES To investigate gene regulation in cochlear development and provide reference information for ear-related research. METHODS Total RNA extraction from the Bama miniature pig cochlea was performed at five time points that covered most of the cochlea development process (E42, E49, E56, E91, P13). Transcriptome sequencing was performed by Illumina HiSeq 2500. Transcriptome data were mapped to the genome using TopHat2. Gene expression was quantified using the Cuffquant and Cuffnorm modules. GO and KEGG pathway-enrichment analysis were in progress about the differentially expressed genes (DEGs) by Perl programs. RESULTS Sequencing of 1778643560000 paired reads revealed 35.9 G of data, and 19,432 expression genes were detected. The ratio of these pairs to the Ensembl genome database was approximately 71% in all samples. The stages E49-E91 and, especially, E49-E56 included the most rapid changes in gene regulation and differentiation for the cochlea. The stem cell characteristics of neural stem cells decreased most rapidly during this period.
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Affiliation(s)
- Qinghua Wang
- Department of Veterinary Medicine, Southwest University, Chongqing, China
- Department of Laboratory Animal Science, College of Basal Medical Science, Third Military Medical University, Shapingba, Chongqing, China
| | - Yan Zhang
- Department of Otorhinolaryngology Head and neck surgery, The First Hospital of Jilin University, Changchun, Jilin, P.R. China
| | - Weiwei Guo
- Department of Otolaryngology, Head and Neck Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - Yu Liu
- Department of Laboratory Animal Science, College of Basal Medical Science, Third Military Medical University, Shapingba, Chongqing, China
| | - Hong Wei
- Department of Laboratory Animal Science, College of Basal Medical Science, Third Military Medical University, Shapingba, Chongqing, China
| | - Shiming Yang
- Department of Otolaryngology, Head and Neck Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
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12
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Chen W, Yi H, Zhang L, Ji F, Yuan S, Zhang Y, Ren L, Li J, Chen L, Guo W, Yang S. Establishing the standard method of cochlear implant in Rongchang pig. Acta Otolaryngol 2017; 137:503-510. [PMID: 28079462 DOI: 10.1080/00016489.2016.1267406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
CONCLUSIONS In this investigation, a large mammal, Rongchang pigs were used to successfully establish a research platform for cochlear implant study on the routine use of it in clinic. OBJECTIVE The aim of this study was to establish a standard method of cochlear implant in a large mammal-pig. METHODS Rongchang pigs were selected, then divided into two groups: normal-hearing group (Mitf +/+) and mutation group with hearing loss (Mitf -/-). Cochlear implants were used and ABR and EABR were recorded. The implanted electrodes were observed by X-ray and HE stains. RESULTS The success with cochlear implant and the best electrode position could be defined in all animals, the coiling of the cochlea reached 1.5-1.75 turns. Immediately after the operation of cochlear implants, the ABR threshold of the operated ear (right) could not be derived for each frequency at 120 dB SPL. Moreover, 7 days after surgery, the low-frequency ABR threshold of the operated ear (right) could be derived partly at 100 dB SPL, but the high-frequency ABR threshold could not be derived at 120 dB SPL. Immediately or 1 week after cochlear implants, the EABR threshold was 90 CL in the Mitf +/+ group. This was obviously lower than the 190 CL in the Mitf -/- group.
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Affiliation(s)
- Wei Chen
- Department of Otolaryngology, Head & Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, PR China
- Department of Otolaryngology, Chinese PLA General Hospital of Air Force, Beijing, PR China
| | - Haijin Yi
- Department of Otolaryngology, Head & Neck Surgery, Beijing Tsinghua Changgung Hospital, Tsinghua University, Beijing, PR China
| | - Liang Zhang
- Key Laboratory of Pig Industry Sciences (Ministry of Agriculture), Chongqing Academy of Animal Science, Chongqing, PR China
| | - Fei Ji
- Department of Otolaryngology, Head & Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, PR China
| | - Shuolong Yuan
- Department of Otolaryngology, Head & Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, PR China
| | - Yue Zhang
- Department of Otolaryngology, Head & Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, PR China
| | - Lili Ren
- Department of Otolaryngology, Head & Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, PR China
| | - Jianan Li
- Department of Otolaryngology, Head & Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, PR China
| | - Lei Chen
- Key Laboratory of Pig Industry Sciences (Ministry of Agriculture), Chongqing Academy of Animal Science, Chongqing, PR China
| | - Weiwei Guo
- Department of Otolaryngology, Head & Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, PR China
| | - Shiming Yang
- Department of Otolaryngology, Head & Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, PR China
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Simulation in Otolaryngology: A Teaching and Training Tool. ACTA OTORRINOLARINGOLOGICA ESPANOLA 2017. [DOI: 10.1016/j.otoeng.2017.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Simulación en Otorrinolaringología: una herramienta de enseñanza y entrenamiento. ACTA OTORRINOLARINGOLOGICA ESPANOLA 2017; 68:115-120. [DOI: 10.1016/j.otorri.2016.04.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 03/14/2016] [Accepted: 04/04/2016] [Indexed: 12/20/2022]
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