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Noda M, Koshu R, Shimada Dias M, Saito C, Takino N, Ito M, Yoshimura H, Ito M, Muramatsu SI. Enhanced Cochlear Transduction by AAV9 with High-Concentration Sucrose. Hum Gene Ther 2023; 34:1064-1071. [PMID: 37642269 DOI: 10.1089/hum.2023.111] [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] [Indexed: 08/31/2023] Open
Abstract
The inner ear is a primary lesion in sensorineural hearing loss and has been a target in gene therapy. The efficacy of gene therapy depends on achieving sufficient levels of transduction at a safe vector dose. Vectors derived from various adeno-associated viruses (AAVs) are predominantly used to deliver therapeutic genes to inner ear cells. AAV9 and its variants vector are attractive candidates for clinical applications since they can cross the mesothelial cell layer and transduce inner hair cells (IHCs), although this requires relatively high doses. In this study, we investigated the effects of sucrose on the transduction of a variant of the AAV9 vector for gene transfer in the inner ear. We found that high concentrations of sucrose increased gene transduction in House Ear Institute-Organ of Corti 1 (HEI-OC1) cells in vitro. In addition, we demonstrated that simultaneous administration of sucrose enhanced the transduction of mouse IHCs and spiral ligament cells using an AAV9 variant vector. The procedure did not increase the thresholds in the auditory brainstem response, suggesting that sucrose had no adverse effect on auditory function. This versatile method may be valuable in the development of novel gene therapies for adult-onset sensorineural hearing loss.
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Affiliation(s)
- Masao Noda
- Department of Otolaryngology-Head and Neck Surgery, Jichi Medical University, Tochigi, Japan
- Division of Neurological Gene Therapy, Jichi Medical University, Tochigi, Japan
| | - Ryota Koshu
- Department of Otolaryngology-Head and Neck Surgery, Jichi Medical University, Tochigi, Japan
| | - Mari Shimada Dias
- Department of Otolaryngology-Head and Neck Surgery, Jichi Medical University, Tochigi, Japan
| | - Chizu Saito
- Department of Otolaryngology-Head and Neck Surgery, Jichi Medical University, Tochigi, Japan
| | - Naomi Takino
- Division of Neurological Gene Therapy, Jichi Medical University, Tochigi, Japan
| | - Mika Ito
- Division of Neurological Gene Therapy, Jichi Medical University, Tochigi, Japan
| | - Hidekane Yoshimura
- Department of Otolaryngology-Head and Neck Surgery, Shinshu University, Japan
| | - Makoto Ito
- Department of Otolaryngology-Head and Neck Surgery, Jichi Medical University, Tochigi, Japan
| | - Shin-Ichi Muramatsu
- Division of Neurological Gene Therapy, Jichi Medical University, Tochigi, Japan
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Suárez-Vega V, Manrique-Huarte R, Dominguez P, Blanco M, Alonso-Burgos A, Pérez-Fernández N. Magnetic Resonance Volumetric Quantification of Vestibular Endolymphatic Hydrops in Patients with Unilateral Definite Meniere's Disease Using 3D Inversion Recovery with Real Reconstruction (3D-REAL-IR) Sequence. J Clin Med 2023; 12:5965. [PMID: 37762906 PMCID: PMC10532400 DOI: 10.3390/jcm12185965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/08/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND The 3D-REAL-IR MRI sequence allows for an in vivo visualization of endolymphatic hydrops. Qualitative assessment methods of the severity of vestibular and cochlear hydrops are the most commonly used. METHODS A quantitative volumetric measurement of vestibular EH in patients with definite unilateral Ménière's disease using the 3D-REAL-IR sequence and the calculation of the endolymphatic ratio (ELR) was intended. RESULTS Volumetric calculations of the vestibules, vestibular endolymph and vestibular ELR are performed in 96 patients with unilateral Ménière's disease and correlated with classic qualitative grading scales. CONCLUSIONS Quantitative volumetric measurement of vestibular hydrops using the 3D-REAL-IR sequence is feasible and reproducible in daily clinical practice. Vestibular ELR values exceeding 60% defined radiologically significant vestibular hydrops, while values below 30% defined radiologically non-significant vestibular hydrops.
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Affiliation(s)
- Víctor Suárez-Vega
- Department of Radiology, Clinica Universidad de Navarra, 28027 Madrid, Spain;
| | - Raquel Manrique-Huarte
- Department of Otorhinolaryngology, Clinica Universidad de Navarra, 31008 Pamplona, Spain;
| | - Pablo Dominguez
- Department of Radiology, Clinica Universidad de Navarra, 31008 Pamplona, Spain;
| | - Melissa Blanco
- Department of Otorhinolaryngology, Clinica Universidad de Navarra, 28027 Madrid, Spain; (M.B.); (N.P.-F.)
| | | | - Nicolás Pérez-Fernández
- Department of Otorhinolaryngology, Clinica Universidad de Navarra, 28027 Madrid, Spain; (M.B.); (N.P.-F.)
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Liu Y, Pyykkö I, Naganawa S, Marques P, Gürkov R, Yang J, Duan M. Consensus on MR Imaging of Endolymphatic Hydrops in Patients With Suspected Hydropic Ear Disease (Meniere). Front Surg 2022; 9:874971. [PMID: 35574547 PMCID: PMC9096015 DOI: 10.3389/fsurg.2022.874971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 03/28/2022] [Indexed: 11/13/2022] Open
Abstract
Endolymphatic hydrops (EH) is considered the histological hallmark of Meniere's disease. Visualization of EH has been achieved by special sequences of inner ear magnetic resonance imaging (MRI) with a gadolinium-based contrast agent via intravenous or intratympanic administration. Although it has been applied for more than 10 years since 2007, a unified view on this technique has not yet been achieved. This paper presents an expert consensus on MRI of endolymphatic hydrops in the following aspects: indications and contra-indications for patient selection, methods of contrast-agent administration (intravenous or intratympanic), MRI sequence selection, the specific scanning parameter settings, and standard image evaluation methods and their advantages and disadvantages. For each part of this consensus, a comment is attached to elucidate the reasons for the recommendation.
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Affiliation(s)
- Yupeng Liu
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Ilmari Pyykkö
- Hearing and Balance Research Unit, Field of Otolaryngology, Faculty of Medicine and Health Technology, School of Medicine, Tampere University, Tampere, Finland
| | - Shinji Naganawa
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Pedro Marques
- Unit of Otorhinolaryngology, Department of Surgery and Physiology, University of Porto Medical School, Porto, Portugal
| | - Robert Gürkov
- ENT Centre at Red Cross Square, University of Munich, Munich, Germany
| | - Jun Yang
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Ear Institute, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
- *Correspondence: Jun Yang
| | - Maoli Duan
- Ear Nose and Throat Patient Area, Trauma and Reparative Medicine Theme, Karolinska University Hospital, Stockholm, Sweden
- Division of Ear, Nose and Throat Diseases, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
- Maoli Duan
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