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Birru B, Veit JGS, Arrigali EM, Van Tine J, Barrett-Catton E, Tonnerre Z, Diaz P, Serban MA. Hyaluronic acid-ibuprofen conjugation: a novel ototherapeutic approach protecting inner ear cells from inflammation-mediated damage. Front Pharmacol 2024; 15:1355283. [PMID: 38425644 PMCID: PMC10902153 DOI: 10.3389/fphar.2024.1355283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 01/22/2024] [Indexed: 03/02/2024] Open
Abstract
There is a substantial need of effective drugs for the treatment of hearing loss, which affects nearly 500 million individuals globally. Hearing loss can be the result of intense or prolonged noise exposure, ototoxic drugs, infections, and trauma, which trigger inflammatory signaling cascades that lead to irreversible damage to cochlear structures. To address this, we developed and characterized a series of covalent conjugates of anti-inflammatory drugs to hyaluronic acid (HA), for potential use as topical ototherapeutics. These conjugates were tested in in vitro assays designed to mirror physiological processes typically observed with acoustic trauma. Intense noise exposure leads to macrophage recruitment to the cochlea and subsequent inflammatory damage to sensory cells. We therefore first tested our conjugates' ability to reduce the release of inflammatory cytokines in macrophages. This anti-inflammatory effect on macrophages also translated to increased cochlear cell viability. In our initial screening, one conjugate, ibuprofen-HA, demonstrated significantly higher anti-inflammatory potential than its counterparts. Subsequent cytokine release profiling of ibuprofen-HA further confirmed its ability to reduce a wider range of inflammatory markers, to a greater extent than its equivalent unconjugated drug. The conjugate's potential as a topical therapeutic was then assessed in previously developed tympanic and round window membrane tissue permeation models. As expected, our data indicate that the conjugate has limited tympanic membrane model permeability; however, it readily permeated the round window membrane model and to a greater extent than the unconjugated drug. Interestingly, our data also revealed that ibuprofen-HA was well tolerated in cellular and tissue cytocompatibility assays, whereas the unconjugated drug displayed significant cytotoxicity at equivalent concentrations. Moreover, our data highlighted the importance of chemical conjugation of ibuprofen to HA; the conjugate had improved anti-inflammatory effects, significantly reduced cytotoxicity, and is more suitable for therapeutic formulation. Overall, this work suggests that ibuprofen-HA could be a promising safe and effective topical ototherapeutic for inflammation-mediated cochlear damage.
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Affiliation(s)
- Bhaskar Birru
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT, United States
| | - Joachim G. S. Veit
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT, United States
- Montana Biotechnology Center (BIOTECH), University of Montana, Missoula, MT, United States
| | - Elizabeth M. Arrigali
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT, United States
| | - Jack Van Tine
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT, United States
| | - Emma Barrett-Catton
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT, United States
| | - Zachary Tonnerre
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT, United States
| | - Philippe Diaz
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT, United States
- Montana Biotechnology Center (BIOTECH), University of Montana, Missoula, MT, United States
| | - Monica A. Serban
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT, United States
- Montana Biotechnology Center (BIOTECH), University of Montana, Missoula, MT, United States
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2
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Liu YC, Xu K. Macrophage-related immune responses in inner ear: a potential therapeutic target for sensorineural hearing loss. Front Neurosci 2024; 17:1339134. [PMID: 38274500 PMCID: PMC10808290 DOI: 10.3389/fnins.2023.1339134] [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: 11/15/2023] [Accepted: 12/22/2023] [Indexed: 01/27/2024] Open
Abstract
Hearing loss is the most common sensory disorder in human beings. Cochlear sensory cells are the basis of hearing. Cochlear sensory cells suffer from various acute or chronic injuries, such as excessive sound stimulation, ototoxic drugs, and age-related degeneration. In response to these stresses, the cochlea develops an immune response. In recent years, studies have shown that the immune response of the inner ear has been regarded as one of the important pathological mechanisms of inner ear injury. Therapeutic interventions for inflammatory responses can effectively alleviate different types of inner ear injury. As the main immune cells in the inner ear, macrophages are involved in the process of inner ear injury caused by various exogenous factors. However, its specific role in the immune response of the inner ear is still unclear. This review focuses on discusses the dynamic changes of macrophages during different types of inner ear injury, and clarifies the potential role of macrophage-related immune response in inner ear injury.
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Affiliation(s)
- Yu-Chen Liu
- Queen Mary School, Jiangxi Medical College, Nanchang University, Nanchang, China
| | - Kai Xu
- Department of Otolaryngology, Head and Neck Surgery, The Second Affiliated Hospital of Nanchang University, Jiangxi Medical College, Nanchang University, Nanchang, China
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3
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Sung CYW, Hayase N, Yuen PST, Lee J, Fernandez K, Hu X, Cheng H, Star RA, Warchol ME, Cunningham LL. Macrophage Depletion Protects Against Cisplatin-Induced Ototoxicity and Nephrotoxicity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.16.567274. [PMID: 38014097 PMCID: PMC10680818 DOI: 10.1101/2023.11.16.567274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Cisplatin is a widely used and highly effective anti-cancer drug with significant side effects including ototoxicity and nephrotoxicity. Macrophages, the major resident immune cells in the cochlea and kidney, are important drivers of both inflammatory and tissue repair responses. To investigate the roles of macrophages in cisplatin-induced ototoxicity and nephrotoxicity, we used PLX3397, an FDA-approved inhibitor of the colony-stimulating factor 1 receptor (CSF1R), to eliminate tissue-resident macrophages during the course of cisplatin administration. Mice treated with cisplatin alone (cisplatin/vehicle) had significant hearing loss (ototoxicity) as well as kidney injury (nephrotoxicity). Macrophage ablation using PLX3397 resulted in significantly reduced hearing loss measured by auditory brainstem responses (ABR) and distortion-product otoacoustic emissions (DPOAE). Sensory hair cells in the cochlea were protected against cisplatin-induced death in mice treated with PLX3397. Macrophage ablation also protected against cisplatin-induced nephrotoxicity, as evidenced by markedly reduced tubular injury and fibrosis as well as reduced plasma blood urea nitrogen (BUN) and neutrophil gelatinase-associated lipocalin (NGAL) levels. Mechanistically, our data suggest that the protective effect of macrophage ablation against cisplatin-induced ototoxicity and nephrotoxicity is mediated by reduced platinum accumulation in both the inner ear and the kidney. Together our data indicate that ablation of tissue-resident macrophages represents a novel strategy for mitigating cisplatin-induced ototoxicity and nephrotoxicity. Brief summary Macrophage ablation using PLX3397 was protective against cisplatin-induced ototoxicity and nephrotoxicity by limiting platinum accumulation in the inner ear and kidney.
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Vasilijic S, Atai NA, Hyakusoku H, Worthington S, Ren Y, Sagers JE, Sahin MI, Brown A, Reddy R, Malhotra C, Fujita T, Landegger LD, Lewis R, Welling DB, Stankovic KM. Identification of immune-related candidate biomarkers in plasma of patients with sporadic vestibular schwannoma. SCIENCE ADVANCES 2023; 9:eadf7295. [PMID: 37948527 PMCID: PMC10637750 DOI: 10.1126/sciadv.adf7295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 10/11/2023] [Indexed: 11/12/2023]
Abstract
Vestibular schwannoma (VS) is an intracranial tumor arising from neoplastic Schwann cells and typically presenting with hearing loss. The traditional belief that hearing deficit is caused by physical expansion of the VS, compressing the auditory nerve, does not explain the common clinical finding that patients with small tumors can have profound hearing loss, suggesting that tumor-secreted factors could influence hearing ability in VS patients. We conducted profiling of patients' plasma for 66 immune-related factors in patients with sporadic VS (N > 170) and identified and validated candidate biomarkers associated with tumor size (S100B) and hearing (MCP-3). We further identified a nine-biomarker panel (TNR-R2, MIF, CD30, MCP-3, IL-2R, BLC, TWEAK, eotaxin, and S100B) with outstanding discriminatory ability for VS. These findings revealed possible therapeutic targets for VS, providing a unique diagnostic tool that may predict hearing change and tumor growth in VS patients, and may inform the timing of tumor resection to preserve hearing.
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Affiliation(s)
- Sasa Vasilijic
- Department of Otolaryngology–Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, USA
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
| | - Nadia A. Atai
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
| | - Hiroshi Hyakusoku
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
- Department of Otorhinolaryngology, Yokosuka Kyosai Hospital, Kanagawa, Japan
| | - Steven Worthington
- Harvard Institute for Quantitative Social Science, Harvard University, Cambridge, MA, USA
| | - Yin Ren
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
| | - Jessica E. Sagers
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
| | - Mehmet I. Sahin
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
| | - Alyssa Brown
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
| | - Rohan Reddy
- Department of Otolaryngology–Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Charvi Malhotra
- Department of Otolaryngology–Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Takeshi Fujita
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
| | - Lukas D. Landegger
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
| | - Richard Lewis
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
- Department of Neurology, Harvard Medical School, Boston, MA, USA
| | - D. Bradley Welling
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
| | - Konstantina M. Stankovic
- Department of Otolaryngology–Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, USA
- Department of Otolaryngology–Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA, USA
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, USA
- Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA, USA
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Natarajan N, Batts S, Stankovic KM. Noise-Induced Hearing Loss. J Clin Med 2023; 12:2347. [PMID: 36983347 PMCID: PMC10059082 DOI: 10.3390/jcm12062347] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/10/2023] [Accepted: 03/14/2023] [Indexed: 03/22/2023] Open
Abstract
Noise-induced hearing loss (NIHL) is the second most common cause of sensorineural hearing loss, after age-related hearing loss, and affects approximately 5% of the world's population. NIHL is associated with substantial physical, mental, social, and economic impacts at the patient and societal levels. Stress and social isolation in patients' workplace and personal lives contribute to quality-of-life decrements which may often go undetected. The pathophysiology of NIHL is multifactorial and complex, encompassing genetic and environmental factors with substantial occupational contributions. The diagnosis and screening of NIHL are conducted by reviewing a patient's history of noise exposure, audiograms, speech-in-noise test results, and measurements of distortion product otoacoustic emissions and auditory brainstem response. Essential aspects of decreasing the burden of NIHL are prevention and early detection, such as implementation of educational and screening programs in routine primary care and specialty clinics. Additionally, current research on the pharmacological treatment of NIHL includes anti-inflammatory, antioxidant, anti-excitatory, and anti-apoptotic agents. Although there have been substantial advances in understanding the pathophysiology of NIHL, there remain low levels of evidence for effective pharmacotherapeutic interventions. Future directions should include personalized prevention and targeted treatment strategies based on a holistic view of an individual's occupation, genetics, and pathology.
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Affiliation(s)
- Nirvikalpa Natarajan
- Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Shelley Batts
- Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Konstantina M. Stankovic
- Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Palo Alto, CA 94304, USA
- Department of Neurosurgery, Stanford University School of Medicine, Palo Alto, CA 94304, USA
- Wu Tsai Neuroscience Institute, Stanford University, Stanford, CA 94305, USA
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Xia A, Thai A, Cao Z, Chen X, Chen J, Bacacao B, Bekale LA, Schiel V, Bollyky PL, Maria PLS. Chronic suppurative otitis media causes macrophage-associated sensorineural hearing loss. J Neuroinflammation 2022; 19:224. [PMID: 36096817 PMCID: PMC9465898 DOI: 10.1186/s12974-022-02585-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 08/23/2022] [Indexed: 11/10/2022] Open
Abstract
Background Chronic suppurative otitis media (CSOM) is the most common cause of permanent hearing loss in children in the developing world. A large component of the permanent hearing loss is sensory in nature and our understanding of the mechanism of this has so far been limited to post-mortem human specimens or acute infection models that are not representative of human CSOM. In this report, we assess cochlear injury in a validated Pseudomonas aeruginosa (PA) CSOM mouse model. Methods We generated persisters (PCs) and inoculated them into the mouse middle ear cavity. We tracked infection with IVIS and detected PA using RT-PCR. We assessed cochlear damage and innate immunity by Immunohistochemistry. Finally, we evaluated cytokines with multiplex assay and quantitative real-time PCR. Results We observed outer hair cell (OHC) loss predominantly in the basal turn of the cochlear at 14 days after bacterial inoculation. Macrophages, not neutrophils are the major immune cells in the cochlea in CSOM displaying increased numbers and a distribution correlated with the observed cochlear injury. The progression of the morphological changes suggests a transition from monocytes into tissue macrophages following infection. We also show that PA do not enter the cochlea and live bacteria are required for cochlear injury. We characterized cytokine activity in the CSOM cochlea. Conclusions Taken together, this data shows a critical role for macrophages in CSOM-mediated sensorineural hearing loss (SNHL). Supplementary Information The online version contains supplementary material available at 10.1186/s12974-022-02585-w.
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Toward Personalized Diagnosis and Therapy for Hearing Loss: Insights From Cochlear Implants. Otol Neurotol 2022; 43:e903-e909. [PMID: 35970169 DOI: 10.1097/mao.0000000000003624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
ABSTRACT Sensorineural hearing loss (SNHL) is the most common sensory deficit, disabling nearly half a billion people worldwide. The cochlear implant (CI) has transformed the treatment of patients with SNHL, having restored hearing to more than 800,000 people. The success of CIs has inspired multidisciplinary efforts to address the unmet need for personalized, cellular-level diagnosis, and treatment of patients with SNHL. Current limitations include an inability to safely and accurately image at high resolution and biopsy the inner ear, precluding the use of key structural and molecular information during diagnostic and treatment decisions. Furthermore, there remains a lack of pharmacological therapies for hearing loss, which can partially be attributed to challenges associated with new drug development. We highlight advances in diagnostic and therapeutic strategies for SNHL that will help accelerate the push toward precision medicine. In addition, we discuss technological improvements for the CI that will further enhance its functionality for future patients. This report highlights work that was originally presented by Dr. Stankovic as part of the Dr. John Niparko Memorial Lecture during the 2021 American Cochlear Implant Alliance annual meeting.
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8
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Yigider AP, Yigit O. Biomarkers in Otorhinolaryngology. Biomark Med 2022. [DOI: 10.2174/9789815040463122010013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Biomarkers of otorhinolaryngologic diseases with higher insult over a
person’s him/herself and overall health services are summarized in brief. In order to
define, diagnose, treat and monitor any disease markers are needed.
Otorhinolaryngology (ORL) is interested in special disease entities of the region
besides otorhinolaryngologic involvements of the systemic diseases and unique forms
of pathologies such as cholesteatoma, Meniere’s disease and otosclerosis. Neoplasia is
another heading to deal with. In the following chapter, one will find an overview of
molecules that have been used as a biomarker as well as the end points of the present
research on the issue relevant with ORL. Day by day, new molecules are being named
however, the pathways of action are rather the same. Readers will find the headings
related to the most common diseases of the field, informing them about where to look
for defining new strategies of understanding of each disease.
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Affiliation(s)
- Ayse Pelin Yigider
- Istanbul Research and Training Hospital Otorhinolaryngology,Istanbul Research and Training Hospital Otorhinolaryngology, Istanbul,Turkey
| | - Ozgur Yigit
- Istanbul Research and Training Hospital Otorhinolaryngology, Istanbul, Turkey
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Lee JI, Seist R, McInturff S, Lee DJ, Brown MC, Stankovic KM, Fried S. Magnetic stimulation allows focal activation of the mouse cochlea. eLife 2022; 11:76682. [PMID: 35608242 PMCID: PMC9177144 DOI: 10.7554/elife.76682] [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: 12/29/2021] [Accepted: 05/20/2022] [Indexed: 11/13/2022] Open
Abstract
Cochlear implants (CIs) provide sound and speech sensations for patients with severe to profound hearing loss by electrically stimulating the auditory nerve. While most CI users achieve some degree of open set word recognition under quiet conditions, hearing that utilizes complex neural coding (e.g., appreciating music) has proved elusive, probably because of the inability of CIs to create narrow regions of spectral activation. Several novel approaches have recently shown promise for improving spatial selectivity, but substantial design differences from conventional CIs will necessitate much additional safety and efficacy testing before clinical viability is established. Outside the cochlea, magnetic stimulation from small coils (micro-coils) has been shown to confine activation more narrowly than that from conventional microelectrodes, raising the possibility that coil-based stimulation of the cochlea could improve the spectral resolution of CIs. To explore this, we delivered magnetic stimulation from micro-coils to multiple locations of the cochlea and measured the spread of activation utilizing a multielectrode array inserted into the inferior colliculus; responses to magnetic stimulation were compared to analogous experiments with conventional microelectrodes as well as to responses when presenting auditory monotones. Encouragingly, the extent of activation with micro-coils was ~60% narrower compared to electric stimulation and largely similar to the spread arising from acoustic stimulation. The dynamic range of coils was more than three times larger than that of electrodes, further supporting a smaller spread of activation. While much additional testing is required, these results support the notion that magnetic micro-coil CIs can produce a larger number of independent spectral channels and may therefore improve auditory outcomes. Further, because coil-based devices are structurally similar to existing CIs, fewer impediments to clinical translational are likely to arise.
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Affiliation(s)
- Jae-Ik Lee
- Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, United States
| | - Richard Seist
- Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, United States.,Department of Otorhinolaryngology - Head and Neck Surgery, Paracelsus Medical University, Salzburg, Austria
| | - Stephen McInturff
- Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, United States.,Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, United States
| | - Daniel J Lee
- Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, United States.,Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, United States
| | - M Christian Brown
- Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, United States.,Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, United States
| | - Konstantina M Stankovic
- Department of Otolaryngology - Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, United States.,Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, United States.,Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, United States
| | - Shelley Fried
- Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, United States.,Boston VA Medical Center, Boston, United States
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10
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Keithley EM. Inner ear immunity. Hear Res 2022; 419:108518. [DOI: 10.1016/j.heares.2022.108518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 05/06/2022] [Accepted: 05/10/2022] [Indexed: 11/26/2022]
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Fuentes-Santamaría V, Alvarado JC, Mellado S, Melgar-Rojas P, Gabaldón-Ull MC, Cabanes-Sanchis JJ, Juiz JM. Age-Related Inflammation and Oxidative Stress in the Cochlea Are Exacerbated by Long-Term, Short-Duration Noise Stimulation. Front Aging Neurosci 2022; 14:853320. [PMID: 35450058 PMCID: PMC9016828 DOI: 10.3389/fnagi.2022.853320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/14/2022] [Indexed: 12/29/2022] Open
Abstract
We have previously reported that young adult rats exposed to daily, short-duration noise for extended time periods, develop accelerated presbycusis starting at 6 months of age. Auditory aging is associated with progressive hearing loss, cell deterioration, dysregulation of the antioxidant defense system, and chronic inflammation, among others. To further characterize cellular and molecular mechanisms at the crossroads between noise and age-related hearing loss (ARHL), 3-month-old rats were exposed to a noise-accelerated presbycusis (NAP) protocol and tested at 6 and 16 months of age, using auditory brainstem responses, Real-Time Reverse Transcription-Quantitative PCR (RT-qPCR) and immunocytochemistry. Chronic noise-exposure leading to permanent auditory threshold shifts in 6-month-old rats, resulted in impaired sodium/potassium activity, degenerative changes in the lateral wall and spiral ganglion, increased lipid peroxidation, and sustained cochlear inflammation with advancing age. Additionally, at 6 months, noise-exposed rats showed significant increases in the gene expression of antioxidant enzymes (superoxide dismutase 1/2, glutathione peroxidase 1, and catalase) and inflammation-associated molecules [ionized calcium binding adaptor molecule 1, interleukin-1 beta (IL-1β), and tumor necrosis factor-alpha]. The levels of IL-1β were upregulated in the spiral ganglion and spiral ligament, particularly in type IV fibrocytes; these cells showed decreased levels of connective tissue growth factor and increased levels of 4-hydroxynonenal. These data provide functional, structural and molecular evidence that age-noise interaction contributes to exacerbating presbycusis in young rats by leading to progressive dysfunction and early degeneration of cochlear cells and structures. These findings contribute to a better understanding of NAP etiopathogenesis, which is essential as it affects the life quality of young adults worldwide.
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Affiliation(s)
- Verónica Fuentes-Santamaría
- Instituto de Investigación en Discapacidades Neurológicas (IDINE), Albacete, Spain
- Facultad de Medicina, Universidad de Castilla-La Mancha, Albacete, Spain
| | - Juan Carlos Alvarado
- Instituto de Investigación en Discapacidades Neurológicas (IDINE), Albacete, Spain
- Facultad de Medicina, Universidad de Castilla-La Mancha, Albacete, Spain
| | - Susana Mellado
- Instituto de Investigación en Discapacidades Neurológicas (IDINE), Albacete, Spain
- Facultad de Medicina, Universidad de Castilla-La Mancha, Albacete, Spain
| | - Pedro Melgar-Rojas
- Instituto de Investigación en Discapacidades Neurológicas (IDINE), Albacete, Spain
- Facultad de Medicina, Universidad de Castilla-La Mancha, Albacete, Spain
| | - María Cruz Gabaldón-Ull
- Instituto de Investigación en Discapacidades Neurológicas (IDINE), Albacete, Spain
- Facultad de Medicina, Universidad de Castilla-La Mancha, Albacete, Spain
| | - José J. Cabanes-Sanchis
- Instituto de Investigación en Discapacidades Neurológicas (IDINE), Albacete, Spain
- Facultad de Medicina, Universidad de Castilla-La Mancha, Albacete, Spain
| | - José M. Juiz
- Instituto de Investigación en Discapacidades Neurológicas (IDINE), Albacete, Spain
- Facultad de Medicina, Universidad de Castilla-La Mancha, Albacete, Spain
- Department of Otolaryngology, Hannover Medical School, NIFE-VIANNA, Cluster of Excellence Hearing4all-German Research Foundation, Hanover, Germany
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Mahshid SS, Higazi AM, Ogier JM, Dabdoub A. Extracellular Biomarkers of Inner Ear Disease and Their Potential for Point-of-Care Diagnostics. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2104033. [PMID: 34957708 PMCID: PMC8948604 DOI: 10.1002/advs.202104033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 11/09/2021] [Indexed: 06/14/2023]
Abstract
Rapid diagnostic testing has become a mainstay of patient care, using easily obtained samples such as blood or urine to facilitate sample analysis at the point-of-care. These tests rely on the detection of disease or organ-specific biomarkers that have been well characterized for a particular disorder. Currently, there is no rapid diagnostic test for hearing loss, which is one of the most prevalent sensory disorders in the world. In this review, potential biomarkers for inner ear-related disorders, their detection, and quantification in bodily fluids are described. The authors discuss lesion-specific changes in cell-free deoxyribonucleic acids (DNAs), micro-ribonucleic acids (microRNAs), proteins, and metabolites, in addition to recent biosensor advances that may facilitate rapid and precise detection of these molecules. Ultimately, these biomarkers may be used to provide accurate diagnostics regarding the site of damage in the inner ear, providing practical information for individualized therapy and assessment of treatment efficacy in the future.
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Affiliation(s)
- Sahar Sadat Mahshid
- Biological SciencesSunnybrook Research InstituteSunnybrook Health Sciences CentreTorontoONM4N 3M5Canada
| | - Aliaa Monir Higazi
- Biological SciencesSunnybrook Research InstituteSunnybrook Health Sciences CentreTorontoONM4N 3M5Canada
- Department of Clinical and Chemical PathologyMinia UniversityMinia61519Egypt
| | - Jacqueline Michelle Ogier
- Biological SciencesSunnybrook Research InstituteSunnybrook Health Sciences CentreTorontoONM4N 3M5Canada
| | - Alain Dabdoub
- Biological SciencesSunnybrook Research InstituteSunnybrook Health Sciences CentreTorontoONM4N 3M5Canada
- Department of Otolaryngology–Head & Neck SurgeryUniversity of TorontoTorontoONM5G 2C4Canada
- Department of Laboratory Medicine and PathobiologyUniversity of TorontoTorontoONM5S 1A8Canada
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13
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Gröschel M, Voigt S, Schwitzer S, Ernst A, Basta D. Cytomegalovirus Seropositivity as a Potential Risk Factor for Increased Noise Trauma Susceptibility. Noise Health 2022; 24:1-6. [PMID: 35645133 PMCID: PMC9239143 DOI: 10.4103/nah.nah_4_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
CONTEXT Cytomegalovirus (CMV) represents the leading congenital viral infection in humans. Although congenital CMV due to vertically transmitted infections is the main cause of CMV-related diseases, adult CMV infections might still be of clinical significance. It is still discussed how far CMV seropositivity, due to horizontal infection in immunocompetent adults, is able to induce significant dysfunction. The present study investigates in how far CMV seropositivity is an additional risk factor for an increasing susceptibility to sensorineural hearing loss induced by acoustic injury during adulthood in a guinea pig CMV (GPCMV) model of noise-induced hearing loss (NIHL). METHODS Two groups (GPCMV seropositive vs. seronegative) of normal hearing adult guinea pigs were exposed to a broadband noise (5-20 kHz) for 2 hours at 115 dB sound pressure level. Frequency-specific auditory brainstem response recordings for determination of auditory threshold shift were carried out and the number of missing outer hair cells was counted 2 weeks after the noise exposure. RESULTS The data show a slightly increased shift in auditory thresholds in seropositive animals compared to the seronegative control group in response to noise trauma. However, the observed difference was significant at least at high frequencies. The differences in threshold shift are not correlated with outer hair cell loss between the experimental groups. CONCLUSION The results point to potential additional pathologies in a guinea pig NIHL model in correlation to GPCMV seropositivity, which should be taken into account when assessing risks of latent/reactivated CMV infection. Due to the relatively slight effect in the present data, the aim of future studies should be a more detailed consideration (e.g., larger sample size) and to localize possible target structures as well as the significance of the infection route.
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Affiliation(s)
- Moritz Gröschel
- Department of Otolaryngology at UKB, University of Berlin, Charité Medical School, Berlin, Germany,Address for correspondence: Dr Moritz Gröschel, Department of Otolaryngology, Unfallkrankenhaus Berlin, Warener Str 7, 12683 Berlin, Germany. E-mail:
| | - Stefan Voigt
- Department of Otolaryngology at UKB, University of Berlin, Charité Medical School, Berlin, Germany
| | - Susanne Schwitzer
- Department of Otolaryngology at UKB, University of Berlin, Charité Medical School, Berlin, Germany
| | - Arne Ernst
- Department of Otolaryngology at UKB, University of Berlin, Charité Medical School, Berlin, Germany
| | - Dietmar Basta
- Department of Otolaryngology at UKB, University of Berlin, Charité Medical School, Berlin, Germany
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Liu Q, Li N, Yang Y, Yan X, Dong Y, Peng Y, Shi J. Prediction of the Molecular Mechanisms Underlying Erlong Zuoci Treatment of Age-Related Hearing Loss via Network Pharmacology-Based Analyses Combined with Experimental Validation. Front Pharmacol 2021; 12:719267. [PMID: 34887749 PMCID: PMC8650627 DOI: 10.3389/fphar.2021.719267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 10/06/2021] [Indexed: 11/13/2022] Open
Abstract
Background: The traditional Chinese medicine formula ErLong ZuoCi (ELZC) has been extensively used to treat age-related hearing loss (ARHL) in clinical practice in China for centuries. However, the underlying molecular mechanisms are still poorly understood. Objective: Combine network pharmacology with experimental validation to explore the potential molecular mechanisms underlying ELZC with a systematic viewpoint. Methods: The chemical components of ELZC were collected from the Traditional Chinese Medicine System Pharmacology database, and their possible target proteins were predicted using the SwissTargetPrediction database. The putative ARHL-related target proteins were identified from the database: GeneCards and OMIM. We constructed the drug-target network as well as drug-disease specific protein-protein interaction networks and performed clustering and topological property analyses. Functional annotation and signaling pathways were performed by gene ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analysis. Finally, in vitro experiments were also performed to validate ELZC’s key target proteins and treatment effects on ARHL. Results: In total, 63 chemical compounds from ELZC and 365 putative ARHL-related targets were identified, and 1860 ARHL-related targets were collected from the OMIM and GeneCards. A total of 145 shared targets of ELZC and ARHL were acquired by Venn diagram analysis. Functional enrichment analysis suggested that ELZC might exert its pharmacological effects in multiple biological processes, such as cell proliferation, apoptosis, inflammatory response, and synaptic connections, and the potential targets might be associated with AKT, ERK, and STAT3, as well as other proteins. In vitro experiments revealed that ELZC pretreatment could decrease senescence-associated β-galactosidase activity in hydrogen peroxide-induced auditory hair cells, eliminate DNA damage, and reduce cellular senescence protein p21 and p53. Finally, Western blot analysis confirmed that ELZC could upregulate the predicted target ERK phosphorylation. Conclusion: We provide an integrative network pharmacology approach, in combination with in vitro experiments to explore the underlying molecular mechanisms governing ELZC treatment of ARHL. The protective effects of ELZC against ARHL were predicted to be associated with cellular senescence, inflammatory response, and synaptic connections which might be linked to various pathways such as JNK/STAT3 and ERK cascade signaling pathways. As a prosperous possibility, our experimental data suggest phosphorylation ERK is essential for ELZC to prevent degeneration of cochlear.
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Affiliation(s)
- Qing Liu
- School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ning Li
- School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yifang Yang
- School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xirui Yan
- School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yang Dong
- Experimental Teaching Center, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yinting Peng
- Experimental Teaching Center, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jianrong Shi
- School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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15
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Steyger PS. Mechanisms of Aminoglycoside- and Cisplatin-Induced Ototoxicity. Am J Audiol 2021; 30:887-900. [PMID: 34415784 PMCID: PMC9126111 DOI: 10.1044/2021_aja-21-00006] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 04/30/2021] [Accepted: 05/14/2021] [Indexed: 12/11/2022] Open
Abstract
Purpose This review article summarizes our current understanding of the mechanisms underlying acquired hearing loss from hospital-prescribed medications that affects as many as 1 million people each year in Western Europe and North America. Yet, there are currently no federally approved drugs to prevent or treat the debilitating and permanent hearing loss caused by the life-saving platinum-based anticancer drugs or the bactericidal aminoglycoside antibiotics. Hearing loss has long-term impacts on quality-of-life measures, especially in young children and older adults. This review article also highlights some of the current knowledge gaps regarding iatrogenic causes of hearing loss. Conclusion Further research is urgently needed to further refine clinical practice and better ameliorate iatrogenic drug-induced hearing loss.
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Affiliation(s)
- Peter S. Steyger
- Translational Hearing Center, Creighton University, Omaha, NE
- National Center for Rehabilitative Auditory Research, VA Portland Health Care System, OR
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16
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Bermúdez-Muñoz JM, Celaya AM, García-Mato Á, Muñoz-Espín D, Rodríguez-de la Rosa L, Serrano M, Varela-Nieto I. Dual-Specificity Phosphatase 1 (DUSP1) Has a Central Role in Redox Homeostasis and Inflammation in the Mouse Cochlea. Antioxidants (Basel) 2021; 10:1351. [PMID: 34572983 PMCID: PMC8467085 DOI: 10.3390/antiox10091351] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/16/2021] [Accepted: 08/23/2021] [Indexed: 12/13/2022] Open
Abstract
Stress-activated protein kinases (SAPK) are associated with sensorineural hearing loss (SNHL) of multiple etiologies. Their activity is tightly regulated by dual-specificity phosphatase 1 (DUSP1), whose loss of function leads to sustained SAPK activation. Dusp1 gene knockout in mice accelerates SNHL progression and triggers inflammation, redox imbalance and hair cell (HC) death. To better understand the link between inflammation and redox imbalance, we analyzed the cochlear transcriptome in Dusp1-/- mice. RNA sequencing analysis (GSE176114) indicated that Dusp1-/- cochleae can be defined by a distinct profile of key cellular expression programs, including genes of the inflammatory response and glutathione (GSH) metabolism. To dissociate the two components, we treated Dusp1-/- mice with N-acetylcysteine, and hearing was followed-up longitudinally by auditory brainstem response recordings. A combination of immunofluorescence, Western blotting, enzymatic activity, GSH levels measurements and RT-qPCR techniques were used. N-acetylcysteine treatment delayed the onset of SNHL and mitigated cochlear damage, with fewer TUNEL+ HC and lower numbers of spiral ganglion neurons with p-H2AX foci. N-acetylcysteine not only improved the redox balance in Dusp1-/- mice but also inhibited cytokine production and reduced macrophage recruitment. Our data point to a critical role for DUSP1 in controlling the cross-talk between oxidative stress and inflammation.
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Affiliation(s)
- Jose M. Bermúdez-Muñoz
- Institute for Biomedical Research “Alberto Sols”, Spanish National Research Council-Autonomous University of Madrid (CSIC-UAM), 28029 Madrid, Spain; (A.M.C.); (Á.G.-M.); (L.R.-d.l.R.)
- Rare Diseases Networking Biomedical Research Centre (CIBERER), CIBER, Carlos III Institute of Health, 28029 Madrid, Spain
| | - Adelaida M. Celaya
- Institute for Biomedical Research “Alberto Sols”, Spanish National Research Council-Autonomous University of Madrid (CSIC-UAM), 28029 Madrid, Spain; (A.M.C.); (Á.G.-M.); (L.R.-d.l.R.)
- Rare Diseases Networking Biomedical Research Centre (CIBERER), CIBER, Carlos III Institute of Health, 28029 Madrid, Spain
| | - Ángela García-Mato
- Institute for Biomedical Research “Alberto Sols”, Spanish National Research Council-Autonomous University of Madrid (CSIC-UAM), 28029 Madrid, Spain; (A.M.C.); (Á.G.-M.); (L.R.-d.l.R.)
- Rare Diseases Networking Biomedical Research Centre (CIBERER), CIBER, Carlos III Institute of Health, 28029 Madrid, Spain
| | - Daniel Muñoz-Espín
- CRUK Cambridge Centre Early Detection Programme, Department of Oncology, University of Cambridge, Hutchison/MRC Research Centre, Cambridge CB2 0XZ, UK;
| | - Lourdes Rodríguez-de la Rosa
- Institute for Biomedical Research “Alberto Sols”, Spanish National Research Council-Autonomous University of Madrid (CSIC-UAM), 28029 Madrid, Spain; (A.M.C.); (Á.G.-M.); (L.R.-d.l.R.)
- Rare Diseases Networking Biomedical Research Centre (CIBERER), CIBER, Carlos III Institute of Health, 28029 Madrid, Spain
- Hospital La Paz Institute for Health Research (IdiPAZ), 28029 Madrid, Spain
| | - Manuel Serrano
- Institute for Research in Biomedicine, Barcelona Institute of Science and Technology (BIST), 08028 Barcelona, Spain;
- Catalan Institution for Research and Advanced Studies (ICREA), 08010 Barcelona, Spain
| | - Isabel Varela-Nieto
- Institute for Biomedical Research “Alberto Sols”, Spanish National Research Council-Autonomous University of Madrid (CSIC-UAM), 28029 Madrid, Spain; (A.M.C.); (Á.G.-M.); (L.R.-d.l.R.)
- Rare Diseases Networking Biomedical Research Centre (CIBERER), CIBER, Carlos III Institute of Health, 28029 Madrid, Spain
- Hospital La Paz Institute for Health Research (IdiPAZ), 28029 Madrid, Spain
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17
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Chen X, Zhang Q, Yang C, Liu Y, Li L. GRβ Regulates Glucocorticoid Resistance in Sudden Sensorineural Hearing Loss. Curr Pharm Biotechnol 2021; 22:1206-1215. [PMID: 33032506 DOI: 10.2174/1389201021666201008163534] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 08/27/2020] [Accepted: 09/04/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND In recent years, the incidence of sudden deafness has gradually increased, with a very limited understanding of its etiology and pathogenesis. Glucocorticoids are the first choice of the treatment, but some hormone-resistant patients are not sensitive to glucocorticoid therapy. The pathogenesis is not yet known. In this study, we aim to construct the HEI-OC1 cell line stably overexpressing Glucocorticoid Receptor Beta (GRβ), and identify its exact role in the cases of glucocorticoidresistant sudden deafness. METHODS We used the endotoxin lipopolysaccharide-stimulated cochlear hair cells (HEI-OC1) to investigate the relationship of inflammation factor IL-2, TNF alpha, and SRp30c with the high expression GRβ. We built a stable GRβ high expression HEI-OC1 cell line and clarified its effects on the therapeutic effect of dexamethasone. MTT assay, colony formation assay, CCK-8 assay, Western blot, and RT-qPCR were utilized for characterizations. RESULTS Dexamethasone reduced the LPS-induced inflammatory response from HEI-OC1 cells (p<0.05), detected by MTT assay. Dexamethasone could protect HEI-OC1 cells, but its protective effect was weakened due to the transfection of SRp30c over-expression plasmid (p<0.05). The transfection of SRp30c over-expression plasmid in HEI-OC1 cells could elevate the expressions of GRβ (p<0.05). CONCLUSION We clarified the mechanisms of high expression of GRβ in glucocorticoid-resistant sudden sensorineural hearing loss, and proved that the inhibition of SRp30c may act as a new treatment way of glucocorticoid-resistant sudden sensorineural hearing loss.
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Affiliation(s)
- Xubo Chen
- Department of Otolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, 330006, China
| | - Qi Zhang
- College of Traditional Chinese Medicine, Jiangxi University of Traditional Chinese medicine, Nanchang, Jiangxi, 330004, China
| | - Chunping Yang
- Department of Otolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, 330006, China
| | - Yuehui Liu
- Department of Otolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, 330006, China
| | - Lihua Li
- Department of Otolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, 330006, China
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18
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Wu L, Vasilijic S, Sun Y, Chen J, Landegger LD, Zhang Y, Zhou W, Ren J, Early S, Yin Z, Ho WW, Zhang N, Gao X, Lee GY, Datta M, Sagers JE, Brown A, Muzikansky A, Stemmer-Rachamimov A, Zhang L, Plotkin SR, Jain RK, Stankovic KM, Xu L. Losartan prevents tumor-induced hearing loss and augments radiation efficacy in NF2 schwannoma rodent models. Sci Transl Med 2021; 13:13/602/eabd4816. [PMID: 34261799 DOI: 10.1126/scitranslmed.abd4816] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 12/10/2020] [Accepted: 05/20/2021] [Indexed: 12/14/2022]
Abstract
Hearing loss is one of the most common symptoms of neurofibromatosis type 2 (NF2) caused by vestibular schwannomas (VSs). Fibrosis in the VS tumor microenvironment (TME) is associated with hearing loss in patients with NF2. We hypothesized that reducing the fibrosis using losartan, an FDA-approved antihypertensive drug that blocks fibrotic and inflammatory signaling, could improve hearing. Using NF2 mouse models, we found that losartan treatment normalized the TME by (i) reducing neuroinflammatory IL-6/STAT3 signaling and preventing hearing loss, (ii) normalizing tumor vasculature and alleviating neuro-edema, and (iii) increasing oxygen delivery and enhancing efficacy of radiation therapy. In preparation to translate these exciting findings into the clinic, we used patient samples and data and demonstrated that IL-6/STAT3 signaling inversely associated with hearing function, that elevated production of tumor-derived IL-6 was associated with reduced viability of cochlear sensory cells and neurons in ex vivo organotypic cochlear cultures, and that patients receiving angiotensin receptor blockers have no progression in VS-induced hearing loss compared with patients on other or no antihypertensives based on a retrospective analysis of patients with VS and hypertension. Our study provides the rationale and critical data for a prospective clinical trial of losartan in patients with VS.
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Affiliation(s)
- Limeng Wu
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Sasa Vasilijic
- Eaton-Peabody Laboratories and Department of Otolaryngology, Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA 02114, USA
| | - Yao Sun
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Jie Chen
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Lukas D Landegger
- Eaton-Peabody Laboratories and Department of Otolaryngology, Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA 02114, USA
| | - Yanling Zhang
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Wenjianlong Zhou
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Jun Ren
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Samuel Early
- Eaton-Peabody Laboratories and Department of Otolaryngology, Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA 02114, USA.,Division of Otolaryngology, Head and Neck Surgery, Department of Surgery, UC San Diego Medical Center, San Diego, CA 92103, USA
| | - Zhenzhen Yin
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - William W Ho
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Na Zhang
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.,Department of Otolaryngology, Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing 100730, China
| | - Xing Gao
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Grace Y Lee
- St. Mark's School, Southborough, MA 01772, USA
| | - Meenal Datta
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Jessica E Sagers
- Eaton-Peabody Laboratories and Department of Otolaryngology, Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA 02114, USA
| | - Alyssa Brown
- Eaton-Peabody Laboratories and Department of Otolaryngology, Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA 02114, USA
| | - Alona Muzikansky
- Division of Biostatistics, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | | | - Luo Zhang
- Department of Otolaryngology, Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing 100730, China
| | - Scott R Plotkin
- Department of Neurology and Cancer Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Rakesh K Jain
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Konstantina M Stankovic
- Eaton-Peabody Laboratories and Department of Otolaryngology, Head and Neck Surgery, Massachusetts Eye and Ear and Harvard Medical School, Boston, MA 02114, USA.
| | - Lei Xu
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.
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19
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Seist R, Landegger LD, Robertson NG, Vasilijic S, Morton CC, Stankovic KM. Cochlin Deficiency Protects Against Noise-Induced Hearing Loss. Front Mol Neurosci 2021; 14:670013. [PMID: 34108864 PMCID: PMC8180578 DOI: 10.3389/fnmol.2021.670013] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 04/16/2021] [Indexed: 12/20/2022] Open
Abstract
Cochlin is the most abundant protein in the inner ear. To study its function in response to noise trauma, we exposed adolescent wild-type (Coch +/+ ) and cochlin knock-out (Coch -/-) mice to noise (8-16 kHz, 103 dB SPL, 2 h) that causes a permanent threshold shift and hair cell loss. Two weeks after noise exposure, Coch-/- mice had substantially less elevation in noise-induced auditory thresholds and hair cell loss than Coch + / + mice, consistent with cochlin deficiency providing protection from noise trauma. Comparison of pre-noise exposure thresholds of auditory brain stem responses (ABRs) and distortion product otoacoustic emissions (DPOAEs) in Coch-/- mice and Coch + / + littermates revealed a small and significant elevation in thresholds of Coch-/- mice, overall consistent with a small conductive hearing loss in Coch-/- mice. We show quantitatively that the pro-inflammatory component of cochlin, LCCL, is upregulated after noise exposure in perilymph of wild-type mice compared to unexposed mice, as is the enzyme catalyzing LCCL release, aggrecanase1, encoded by Adamts4. We further show that upregulation of pro-inflammatory cytokines in perilymph and cochlear soft-tissue after noise exposure is lower in cochlin knock-out than wild-type mice. Taken together, our data demonstrate for the first time that cochlin deficiency results in conductive hearing loss that protects against physiologic and molecular effects of noise trauma.
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Affiliation(s)
- Richard Seist
- Eaton-Peabody Laboratories and Department of Otolaryngology – Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA, United States
- Department of Otolaryngology – Head and Neck Surgery, Harvard Medical School, Boston, MA, United States
- Department of Otorhinolaryngology – Head and Neck Surgery, Paracelsus Medical University, Salzburg, Austria
| | - Lukas D. Landegger
- Eaton-Peabody Laboratories and Department of Otolaryngology – Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA, United States
- Department of Otolaryngology – Head and Neck Surgery, Harvard Medical School, Boston, MA, United States
- Department of Otorhinolaryngology – Head and Neck Surgery, Medical University of Vienna, Vienna, Austria
| | - Nahid G. Robertson
- Department of Obstetrics and Gynecology and of Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
| | - Sasa Vasilijic
- Eaton-Peabody Laboratories and Department of Otolaryngology – Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA, United States
- Department of Otolaryngology – Head and Neck Surgery, Harvard Medical School, Boston, MA, United States
| | - Cynthia C. Morton
- Department of Obstetrics and Gynecology and of Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
- Broad Institute of MIT and Harvard, Cambridge, MA, United States
- Manchester Centre for Audiology and Deafness, School of Health Sciences, University of Manchester, Manchester, United Kingdom
- Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, MA, United States
| | - Konstantina M. Stankovic
- Eaton-Peabody Laboratories and Department of Otolaryngology – Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA, United States
- Department of Otolaryngology – Head and Neck Surgery, Harvard Medical School, Boston, MA, United States
- Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, MA, United States
- Harvard Program in Therapeutic Science, Harvard Medical School, Boston, MA, United States
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20
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Erhan E, Salcan I, Bayram R, Suleyman B, Dilber M, Yazici GN, Coban TA, Altuner D, Suleyman H. Protective effect of lutein against acrolein-induced ototoxicity in rats. Biomed Pharmacother 2021; 137:111281. [PMID: 33578233 DOI: 10.1016/j.biopha.2021.111281] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/25/2020] [Accepted: 01/12/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Acrolein is a reactive aldehyde that forms during burning of wood and other fuels. It is also a product of lipid peroxidation (LPO) reactions and is present in cigarette smoke. Acrolein is known to cause oxidative stress and inflammatory nerve tissue damage. Lutein is a tetraterpenoid molecule with antioxidant and anti-inflammatory properties. There appear to be no studies on the effect of lutein on vestibulocochlear nerve damage induced by acrolein. The aim of this study was to investigate the effect of lutein on vestibulocochlear nerve damage induced by acrolein in rats using biochemical and histopathological methods. METHODS The rats were divided into three groups (n = 6, for each group) a healthy control group (HG), an acrolein (ACR) group and a lutein and acrolein (LACR) group. In the LACR group, lutein was administered (1 mg/kg) via oral gavage. The ACR and HG groups received saline via oral gavage. Then, 1 h after the administration of lutein and saline, the LACR and ACR groups were treated with 3 mg/kg of acrolein via oral gavage. This procedure was repeated once a day for 30 days. RESULTS The results of biochemical experiments showed that in the vestibulocochlear nerve tissues of the animals treated with acrolein, the levels of malondialdehyde, total oxidants, nuclear factor kappa b, tumor necrosis factor alpha and interleukin 1 beta significantly increased, whereas the levels of total glutathione and total antioxidants decreased as compared to those in the HG and LACR groups. In addition, severe histopathological damage was observed in vestibulocochlear nerve tissue of the acrolein group, whereas this damage was alleviated in the lutein group. CONCLUSION Lutein protected vestibulocochlear nerve tissue from acrolein-associated oxidative and proinflammatory damage. This suggests that lutein might be useful in preventing or treating acrolein-induced ototoxicity.
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Affiliation(s)
- Ertugrul Erhan
- Department of Otorhinolaryngology, Faculty of Medicine, Erzincan Binali Yıldırım University, Erzincan, Turkey
| | - Ismail Salcan
- Department of Otorhinolaryngology, Faculty of Medicine, Erzincan Binali Yıldırım University, Erzincan, Turkey
| | - Rana Bayram
- Department of Otorhinolaryngology, Faculty of Medicine, Erzincan Binali Yıldırım University, Erzincan, Turkey
| | - Bahadir Suleyman
- Department of Pharmacology, Faculty of Medicine, Erzincan Binali Yıldırım University, Erzincan, Turkey
| | | | - Gulce Naz Yazici
- Department of Histology, Faculty of Medicine, Erzincan Binali Yildirim University, Erzincan, Turkey
| | - Taha Abdulkadir Coban
- Department of Medical Biochemistry, Faculty of Medicine, Erzincan Binali Yildirim University, Erzincan, Turkey
| | - Durdu Altuner
- Department of Pharmacology, Faculty of Medicine, Erzincan Binali Yıldırım University, Erzincan, Turkey
| | - Halis Suleyman
- Department of Pharmacology, Faculty of Medicine, Erzincan Binali Yıldırım University, Erzincan, Turkey.
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21
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Wu CC, Brugeaud A, Seist R, Lin HC, Yeh WH, Petrillo M, Coppola G, Edge ASB, Stankovic KM. Altered expression of genes regulating inflammation and synaptogenesis during regrowth of afferent neurons to cochlear hair cells. PLoS One 2020; 15:e0238578. [PMID: 33001981 PMCID: PMC7529247 DOI: 10.1371/journal.pone.0238578] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 08/19/2020] [Indexed: 12/20/2022] Open
Abstract
The spiral ganglion neurons constitute the primary connection between auditory hair cells and the brain. The spiral ganglion afferent fibers and their synapse with hair cells do not regenerate to any significant degree in adult mammalian ears after damage. We have investigated gene expression changes after kainate-induced disruption of the synapses in a neonatal cochlear explant model in which peripheral fibers and the afferent synapse do regenerate. We compared gene expression early after damage, during regeneration of the fibers and synapses, and after completion of in vitro regeneration. These analyses revealed a total of 2.5% differentially regulated transcripts (588 out of 24,000) based on a threshold of p<0.005. Inflammatory response genes as well as genes involved in regeneration of neural circuits were upregulated in the spiral ganglion neurons and organ of Corti, where the hair cells reside. Prominent genes upregulated at several time points included genes with roles in neurogenesis (Elavl4 and Sox21), neural outgrowth (Ntrk3 and Ppp1r1c), axonal guidance (Rgmb and Sema7a), synaptogenesis (Nlgn2 and Psd2), and synaptic vesicular function (Syt8 and Syn1). Immunohistochemical and in situ hybridization analysis of genes that had not previously been described in the cochlea confirmed their cochlear expression. The time course of expression of these genes suggests that kainate treatment resulted in a two-phase response in spiral ganglion neurons: an acute response consistent with inflammation, followed by an upregulation of neural regeneration genes. Identification of the genes activated during regeneration of these fibers suggests candidates that could be targeted to enhance regeneration in adult ears.
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Affiliation(s)
- Chen-Chi Wu
- Eaton Peabody Laboratories and Department of Otolaryngology—Head and Neck Surgery, Massachusetts Eye and Ear, Boston, Massachusetts, United States of America
- Department of Otolaryngology—Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Aurore Brugeaud
- Eaton Peabody Laboratories and Department of Otolaryngology—Head and Neck Surgery, Massachusetts Eye and Ear, Boston, Massachusetts, United States of America
- Department of Otolaryngology—Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Richard Seist
- Eaton Peabody Laboratories and Department of Otolaryngology—Head and Neck Surgery, Massachusetts Eye and Ear, Boston, Massachusetts, United States of America
- Department of Otolaryngology—Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States of America
- Department of Otorhinolaryngology-Head and Neck Surgery, Paracelsus Medical University, Salzburg, Austria
| | - Hsiao-Chun Lin
- Eaton Peabody Laboratories and Department of Otolaryngology—Head and Neck Surgery, Massachusetts Eye and Ear, Boston, Massachusetts, United States of America
- Department of Otolaryngology—Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Wei-Hsi Yeh
- Eaton Peabody Laboratories and Department of Otolaryngology—Head and Neck Surgery, Massachusetts Eye and Ear, Boston, Massachusetts, United States of America
- Department of Otolaryngology—Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States of America
- Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Marco Petrillo
- Eaton Peabody Laboratories and Department of Otolaryngology—Head and Neck Surgery, Massachusetts Eye and Ear, Boston, Massachusetts, United States of America
- Department of Otolaryngology—Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Giovanni Coppola
- Program in Neurogenetics, Department of Neurology, University of California Los Angeles, Los Angeles, California, United States of America
| | - Albert S. B. Edge
- Eaton Peabody Laboratories and Department of Otolaryngology—Head and Neck Surgery, Massachusetts Eye and Ear, Boston, Massachusetts, United States of America
- Department of Otolaryngology—Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States of America
- Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Konstantina M. Stankovic
- Eaton Peabody Laboratories and Department of Otolaryngology—Head and Neck Surgery, Massachusetts Eye and Ear, Boston, Massachusetts, United States of America
- Department of Otolaryngology—Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States of America
- Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, Massachusetts, United States of America
- Harvard Program in Therapeutic Science, Harvard Medical School, Boston, Massachusetts, United States of America
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22
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Varela-Nieto I, Murillo-Cuesta S, Calvino M, Cediel R, Lassaletta L. Drug development for noise-induced hearing loss. Expert Opin Drug Discov 2020; 15:1457-1471. [PMID: 32838572 DOI: 10.1080/17460441.2020.1806232] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Excessive exposure to noise is a common occurrence that contributes to approximately 50% of the non-genetic hearing loss cases. Researchers need to develop standardized preclinical models and identify molecular targets to effectively develop prevention and curative therapies. AREAS COVERED In this review, the authors discuss the many facets of human noise-induced pathology, and the primary experimental models for studying the basic mechanisms of noise-induced damage, making connections and inferences among basic science studies, preclinical proofs of concept and clinical trials. EXPERT OPINION Whilst experimental research in animal models has helped to unravel the mechanisms of noise-induced hearing loss, there are often methodological variations and conflicting results between animal and human studies which make it difficult to integrate data and translate basic outcomes to clinical practice. Standardization of exposure paradigms and application of -omic technologies will contribute to improving the effectiveness of transferring newly gained knowledge to clinical practice.
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Affiliation(s)
- Isabel Varela-Nieto
- Neurobiology of Hearing Research Group, Endocrine and Nervous System Pathophysiology Department, Institute for Biomedical Research "Alberto Sols" CSIC-UAM , Madrid, Spain.,Institute for Biomedical Research "Alberto Sols" CSIC-UAM , Madrid, Spain.,Oto-Neurosurgery Research Group, Cancer and Human Molecular Genetics Department, IdiPAZ Research Institute , Madrid, Spain
| | - Silvia Murillo-Cuesta
- Neurobiology of Hearing Research Group, Endocrine and Nervous System Pathophysiology Department, Institute for Biomedical Research "Alberto Sols" CSIC-UAM , Madrid, Spain.,Institute for Biomedical Research "Alberto Sols" CSIC-UAM , Madrid, Spain.,Oto-Neurosurgery Research Group, Cancer and Human Molecular Genetics Department, IdiPAZ Research Institute , Madrid, Spain
| | - Miryam Calvino
- Institute for Biomedical Research "Alberto Sols" CSIC-UAM , Madrid, Spain.,Oto-Neurosurgery Research Group, Cancer and Human Molecular Genetics Department, IdiPAZ Research Institute , Madrid, Spain.,Department of Otorhinolaryngology, La Paz University Hospital , Madrid, Spain
| | - Rafael Cediel
- Neurobiology of Hearing Research Group, Endocrine and Nervous System Pathophysiology Department, Institute for Biomedical Research "Alberto Sols" CSIC-UAM , Madrid, Spain.,Institute for Biomedical Research "Alberto Sols" CSIC-UAM , Madrid, Spain.,Oto-Neurosurgery Research Group, Cancer and Human Molecular Genetics Department, IdiPAZ Research Institute , Madrid, Spain.,Department of Animal Medicine and Surgery, Complutense University of Madrid , Madrid, Spain
| | - Luis Lassaletta
- Institute for Biomedical Research "Alberto Sols" CSIC-UAM , Madrid, Spain.,Oto-Neurosurgery Research Group, Cancer and Human Molecular Genetics Department, IdiPAZ Research Institute , Madrid, Spain.,Department of Otorhinolaryngology, La Paz University Hospital , Madrid, Spain
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23
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Hou Z, Neng L, Zhang J, Cai J, Wang X, Zhang Y, Lopez IA, Shi X. Acoustic Trauma Causes Cochlear Pericyte-to-Myofibroblast-Like Cell Transformation and Vascular Degeneration, and Transplantation of New Pericytes Prevents Vascular Atrophy. THE AMERICAN JOURNAL OF PATHOLOGY 2020; 190:1943-1959. [PMID: 32562655 DOI: 10.1016/j.ajpath.2020.05.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 05/19/2020] [Accepted: 05/26/2020] [Indexed: 12/20/2022]
Abstract
Acoustic trauma disrupts cochlear blood flow and damages sensory hair cells. Damage and regression of capillaries after acoustic trauma have long been observed, but the underlying mechanism of pathology has not been understood. We show herein that loud sound causes change of phenotype from neural/glial antigen 2 positive/α-smooth muscle actin negative to neural/glial antigen 2 positive/α-smooth muscle actin positive in some pericytes (PCs) on strial capillaries that is strongly associated with up-regulation of transforming growth factor-β1. The acoustic trauma also reduced capillary density and increased deposition of matrix proteins, particularly in the vicinity of transformed PCs. In a newly established in vitro three-dimensional endothelial cell (EC) and PC co-culture model, transformed PCs induced thicker capillary-like branches in ECs and increased collagen IV and laminin expression. Transplantation of exogenous PCs derived from neonatal day 10 mouse cochleae to acoustic traumatized cochleae, however, significantly attenuated the decreased vascular density in the stria. Transplantation of PCs pretransfected with adeno-associated virus 1-vascular endothelial growth factor-A165 under control of a hypoxia-response element markedly promotes vascular volume and blood flow, increased proliferation of PCs and ECs, and attenuated loud sound-caused loss in endocochlear potential and hearing. Our results indicate that loud sound-triggered PC transformation contributes to capillary wall thickening and regression, and young PC transplantation effectively rehabilitates the vascular regression and improves hearing.
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Affiliation(s)
- Zhiqiang Hou
- Department of Otolaryngology/Head & Neck Surgery, Oregon Hearing Research Center, Oregon Health & Science University, Portland, Oregon
| | - Lingling Neng
- Department of Otolaryngology/Head & Neck Surgery, Oregon Hearing Research Center, Oregon Health & Science University, Portland, Oregon
| | - Jinhui Zhang
- Department of Otolaryngology/Head & Neck Surgery, Oregon Hearing Research Center, Oregon Health & Science University, Portland, Oregon
| | - Jing Cai
- Department of Otolaryngology/Head & Neck Surgery, Oregon Hearing Research Center, Oregon Health & Science University, Portland, Oregon
| | - Xiaohan Wang
- Department of Otolaryngology/Head & Neck Surgery, Oregon Hearing Research Center, Oregon Health & Science University, Portland, Oregon; Center for Life Sciences, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Yunpei Zhang
- Department of Otolaryngology/Head & Neck Surgery, Oregon Hearing Research Center, Oregon Health & Science University, Portland, Oregon
| | - Ivan A Lopez
- Cellular and Molecular Biology of the Inner Ear Laboratory, Department of Head and Neck Surgery, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Xiaorui Shi
- Department of Otolaryngology/Head & Neck Surgery, Oregon Hearing Research Center, Oregon Health & Science University, Portland, Oregon.
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24
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Rodrigues JC, Bachi ALL, Silva GAV, Rossi M, do Amaral JB, Lezirovitz K, de Brito R. New Insights on the Effect of TNF Alpha Blockade by Gene Silencing in Noise-Induced Hearing Loss. Int J Mol Sci 2020; 21:ijms21082692. [PMID: 32294929 PMCID: PMC7215896 DOI: 10.3390/ijms21082692] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 04/06/2020] [Accepted: 04/10/2020] [Indexed: 02/07/2023] Open
Abstract
Noise exposure represents the second most common cause of acquired sensorineural hearing loss and we observed that tumor necrosis factor α (TNFα) was involved in this context. The effect of Tnfα gene silencing on the expression profile related to the TNFα metabolic pathway in an experimental model of noise-induced hearing loss had not previously been studied. Methods: Single ears of Wistar rats were pretreated with Tnfα small interfering RNA (siRNA) by trans-tympanic administration 24 h before they were exposed to white noise (120 dBSPL for three hours). After 24 h of noise exposure, we analyzed the electrophysiological threshold and the amplitude of waves I, II, III, and IV in the auditory brain response click. In addition, qRT-PCR was performed to evaluate the TNFα metabolic pathway in the ears submitted or not to gene silencing. Results: Preservation of the electrophysiological threshold and the amplitude of waves was observed in the ears submitted to gene silencing compared to the ears not treated. Increased anti-apoptotic gene expression and decreased pro-apoptotic gene expression were found in the treated ears. Conclusion: Our results allow us to suggest that the blockade of TNFα by gene silencing was useful to prevent noise-induced hearing loss.
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Affiliation(s)
- Janaína C. Rodrigues
- Clinical Hospital, Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of São Paulo (USP), São Paulo 05403-000, Brazil; (K.L.); (R.d.B.)
- Laboratory of Otolaryngology (LIM32), School of Medicine, University of São Paulo (USP), São Paulo 05403-000, Brazil;
- Correspondence:
| | - André L. L. Bachi
- ENT Research Lab. Department of Otorhinolaryngology-Head and Neck Surgery, Federal University of São Paulo. (UNIFESP), São Paulo-SP 04039-032, Brazil; (A.L.L.B.); (M.R.); (J.B.d.A.)
- Brazilian Institute of Teaching and Research in Pulmonary and Exercise Immunology (IBEPIPE), São José dos Campos 12245-520, Brazil
- Post-graduation Program in Health Sciences, Santo Amaro University (UNISA), São Paulo 04829-300, Brazil
| | - Gleiciele A. V. Silva
- Laboratory of Otolaryngology (LIM32), School of Medicine, University of São Paulo (USP), São Paulo 05403-000, Brazil;
| | - Marcelo Rossi
- ENT Research Lab. Department of Otorhinolaryngology-Head and Neck Surgery, Federal University of São Paulo. (UNIFESP), São Paulo-SP 04039-032, Brazil; (A.L.L.B.); (M.R.); (J.B.d.A.)
| | - Jonatas B. do Amaral
- ENT Research Lab. Department of Otorhinolaryngology-Head and Neck Surgery, Federal University of São Paulo. (UNIFESP), São Paulo-SP 04039-032, Brazil; (A.L.L.B.); (M.R.); (J.B.d.A.)
| | - Karina Lezirovitz
- Clinical Hospital, Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of São Paulo (USP), São Paulo 05403-000, Brazil; (K.L.); (R.d.B.)
- Laboratory of Otolaryngology (LIM32), School of Medicine, University of São Paulo (USP), São Paulo 05403-000, Brazil;
| | - Rubens de Brito
- Clinical Hospital, Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of São Paulo (USP), São Paulo 05403-000, Brazil; (K.L.); (R.d.B.)
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25
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Katsumi S, Sahin MI, Lewis RM, Iyer JS, Landegger LD, Stankovic KM. Intracochlear Perfusion of Tumor Necrosis Factor-Alpha Induces Sensorineural Hearing Loss and Synaptic Degeneration in Guinea Pigs. Front Neurol 2020; 10:1353. [PMID: 32116980 PMCID: PMC7025643 DOI: 10.3389/fneur.2019.01353] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 12/09/2019] [Indexed: 12/15/2022] Open
Abstract
Tumor necrosis factor-alpha (TNF-α) is a proinflammatory cytokine that plays a prominent role in the nervous system, mediating a range of physiologic and pathologic functions. In the auditory system, elevated levels of TNF-α have been implicated in several types of sensorineural hearing loss, including sensorineural hearing loss induced by vestibular schwannoma, a potentially fatal intracranial tumor that originates from the eighth cranial nerve; however, the mechanisms underlying the tumor's deleterious effects on hearing are not well-understood. Here, we investigated the effect of acute elevations of TNF-α in the inner ear on cochlear function and morphology by perfusing the cochlea with TNF-α in vivo in guinea pigs. TNF-α perfusion did not significantly change thresholds for compound action potential (CAP) responses, which reflect cochlear nerve activity, or distortion product otoacoustic emissions, which reflect outer hair cell integrity. However, intracochlear TNF-α perfusion reduced CAP amplitudes and increased the number of inner hair cell synapses without paired post-synaptic terminals, suggesting a pattern of synaptic degeneration that resembles that observed in primary cochlear neuropathy. Additionally, etanercept, a TNF-α blocker, protected against TNF-α-induced synaptopathy when administered systemically prior to intracochlear TNF-α perfusion. Findings motivate further investigation into the harmful effects of chronically elevated intracochlear levels of TNF-α, and the potential for etanercept to counter these effects.
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Affiliation(s)
- Sachiyo Katsumi
- Eaton Peabody Laboratories, Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA, United States.,Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, United States
| | - Mehmet I Sahin
- Eaton Peabody Laboratories, Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA, United States.,Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, United States
| | - Rebecca M Lewis
- Eaton Peabody Laboratories, Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA, United States.,Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, United States
| | - Janani S Iyer
- Eaton Peabody Laboratories, Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA, United States.,Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, United States.,Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, MA, United States
| | - Lukas D Landegger
- Eaton Peabody Laboratories, Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA, United States.,Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, United States
| | - Konstantina M Stankovic
- Eaton Peabody Laboratories, Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA, United States.,Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, United States.,Program in Speech and Hearing Bioscience and Technology, Harvard Medical School, Boston, MA, United States.,Harvard Program in Therapeutic Science, Harvard Medical School, Boston, MA, United States
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