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Nassauer L, Schott JW, Harre J, Warnecke A, Morgan M, Galla M, Schambach A. The caspase-inhibitor Emricasan efficiently counteracts cisplatin- and neomycin-induced cytotoxicity in cochlear cells. J Mol Med (Berl) 2024; 102:1163-1174. [PMID: 39110182 PMCID: PMC11358181 DOI: 10.1007/s00109-024-02472-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 06/07/2024] [Accepted: 07/25/2024] [Indexed: 08/30/2024]
Abstract
Cisplatin is a chemotherapeutic agent widely used to treat solid tumors. However, it can also be highly ototoxic, resulting in high-frequency hearing loss. Cisplatin causes degeneration of hair cells (HCs) and spiral ganglion neurons (SGNs) in the inner ear, which are essential components of the hearing process and cannot be regenerated in mammals. As the affected cells primarily die by apoptosis, we tested several anti-apoptotic small molecules to protect these cells from drug-induced toxicity. We found that the general caspase inhibitor Emricasan could significantly counteract the toxic effects of cisplatin in House Ear Institute-Organ of Corti 1 (HEI-OC1) cells, phoenix auditory cells, and primary SGNs. Importantly, the anti-cytotoxic effect in neuronal cells was even more pronounced than the effect of sodium thiosulfate (STS), which is currently the only approved prevention option for cisplatin-induced ototoxicity. Finally, we tested the protective effect of Emricasan treatment in the context of another ototoxic drug, i.e., the aminoglycoside antibiotic neomycin, and again found a significant increase in cell viability when the cultures were co-treated with Emricasan. These results suggest a promising strategy to prevent ototoxicity in patients by temporarily blocking the apoptotic pathway when applying cisplatin or aminoglycoside antibiotics. KEY MESSAGES: Anti-apoptotic small molecules can reduce cisplatin-induced toxicity. Emricasan can effectively exert its anti-apoptotic effect on cochlear cells. Strong protection from cisplatin- and neomycin-induced cytotoxicity with Emricasan. Sodium thiosulfate and Emricasan provide similar protective effects to cisplatin-treated cells. Emricasan is more potent than sodium thiosulfate in reducing neomycin-induced cytotoxicity.
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Affiliation(s)
- Larissa Nassauer
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625, Hannover, Germany
| | - Juliane W Schott
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625, Hannover, Germany
| | - Jennifer Harre
- Department of Otorhinolaryngology, Head and Neck Surgery, Hannover Medical School, 30625, Hannover, Germany
- Cluster of Excellence "Hearing4all", Hannover Medical School, 30625, Hannover, Germany
| | - Athanasia Warnecke
- Department of Otorhinolaryngology, Head and Neck Surgery, Hannover Medical School, 30625, Hannover, Germany
- Cluster of Excellence "Hearing4all", Hannover Medical School, 30625, Hannover, Germany
| | - Michael Morgan
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625, Hannover, Germany
| | - Melanie Galla
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625, Hannover, Germany.
| | - Axel Schambach
- Institute of Experimental Hematology, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625, Hannover, Germany.
- Division of Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, MA, 02115, USA.
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Gill NB, Dowker-Key PD, Hedrick M, Bettaieb A. Unveiling the Role of Oxidative Stress in Cochlear Hair Cell Death: Prospective Phytochemical Therapeutics against Sensorineural Hearing Loss. Int J Mol Sci 2024; 25:4272. [PMID: 38673858 PMCID: PMC11050722 DOI: 10.3390/ijms25084272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/31/2024] [Accepted: 04/07/2024] [Indexed: 04/28/2024] Open
Abstract
Hearing loss represents a multifaceted and pervasive challenge that deeply impacts various aspects of an individual's life, spanning psychological, emotional, social, and economic realms. Understanding the molecular underpinnings that orchestrate hearing loss remains paramount in the quest for effective therapeutic strategies. This review aims to expound upon the physiological, biochemical, and molecular aspects of hearing loss, with a specific focus on its correlation with diabetes. Within this context, phytochemicals have surfaced as prospective contenders in the pursuit of potential adjuvant therapies. These compounds exhibit noteworthy antioxidant and anti-inflammatory properties, which hold the potential to counteract the detrimental effects induced by oxidative stress and inflammation-prominent contributors to hearing impairment. Furthermore, this review offers an up-to-date exploration of the diverse molecular pathways modulated by these compounds. However, the dynamic landscape of their efficacy warrants recognition as an ongoing investigative topic, inherently contingent upon specific experimental models. Ultimately, to ascertain the genuine potential of phytochemicals as agents in hearing loss treatment, a comprehensive grasp of the molecular mechanisms at play, coupled with rigorous clinical investigations, stands as an imperative quest.
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Affiliation(s)
- Nicholas B. Gill
- Department of Nutrition, University of Tennessee Knoxville, Knoxville, TN 37996-0840, USA
| | - Presley D. Dowker-Key
- Department of Nutrition, University of Tennessee Knoxville, Knoxville, TN 37996-0840, USA
| | - Mark Hedrick
- Department of Audiology & Speech Pathology, The University of Tennessee Health Science Center, Knoxville, TN 37996-0240, USA
| | - Ahmed Bettaieb
- Department of Nutrition, University of Tennessee Knoxville, Knoxville, TN 37996-0840, USA
- Graduate School of Genome Science and Technology, University of Tennessee Knoxville, Knoxville, TN 37996-0840, USA
- Department of Biochemistry, Cellular and Molecular Biology, University of Tennessee Knoxville, Knoxville, TN 37996-0840, USA
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Li Y, Zeng S, Zhou F, Jie H, Yu D, Hou S, Chen P, Gao D, Liu Y, Yang J, He J. Overexpression of XIAP inhibits cisplatin-induced hair cell loss. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2022; 1869:119204. [PMID: 35026350 DOI: 10.1016/j.bbamcr.2021.119204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 12/09/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
Cisplatin is a platinum-containing drug with ototoxicity commonly used clinically and has significant efficacy against a variety of solid tumors. One of the most important mechanisms of ototoxicity is that cisplatin induces apoptosis of hair cells. According to relevant literature, X-linked inhibitor of apoptosis protein (XIAP, anti-apoptotic protein) could inhibit the apoptotic pathway. We hypothesized that this protein might protect cochlear hair cells from cisplatin-induced injury. To figure it out, we treated cochlea of normal mice with various concentrations of cisplatin to observe the response and morphology of hair cells and determine a reasonable concentration. Next, Western Blot and quantitative Real-Time Polymerase Chain Reaction (qRT-PCR) experiments were conducted to make an investigation about the expression of XIAP protein and mRNA. In addition, we constructed and identified XIAP overexpressing mice. Finally, we treated cochlear tissues of normal and overexpressing mice with cisplatin to investigate the cyto-protection of XIAP on hair cells, respectively. It was found that 50 μmol/L cisplatin resulted in significant loss and disorganization of hair cells, while simultaneously downregulating the protein and mRNA of XIAP. In XIAP overexpressing mice, the loss and disorganization of hair cells were significantly lessened. These results showed that XIAP can lessen cisplatin-induced hair cell loss and play a role in otoprotection.
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Affiliation(s)
- Yue Li
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai 200092, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai 200092, China
| | - Shan Zeng
- ENT Institute and Otorhinolaryngology Department of Affiliated Eye and ENT Hospital, State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai 200031, China
| | - Fengjie Zhou
- General Hospital of the Central Theater Command of the PLA, China
| | - Huiqun Jie
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai 200092, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai 200092, China
| | - Dongzhen Yu
- Department of Otorhinolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Shule Hou
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai 200092, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai 200092, China
| | - Penghui Chen
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai 200092, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai 200092, China
| | - Dekun Gao
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai 200092, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai 200092, China
| | - Yupeng Liu
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai 200092, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai 200092, China.
| | - Jun Yang
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai 200092, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai 200092, China.
| | - Jingchun He
- Department of Otorhinolaryngology-Head & Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China; Shanghai Jiaotong University School of Medicine Ear Institute, Shanghai 200092, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai 200092, China.
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Febles NK, Bauer MA, Ding B, Zhu X, Gallant ND, Frisina RD. A combinatorial approach to protect sensory tissue against cisplatin-induced ototoxicity. Hear Res 2022; 415:108430. [PMID: 35051751 PMCID: PMC8810742 DOI: 10.1016/j.heares.2022.108430] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 12/22/2021] [Accepted: 01/03/2022] [Indexed: 12/23/2022]
Abstract
Sensorineural Hearing Loss (SNHL) is a highly prevalent disorder involving permanent damage or loss to the inner ear's mechano-sensory hair cells and nerve fibers. Major contributing causes are ototoxic drugs, loud noises, and aging. Drug-induced hearing loss (DIHL), affects over 25% of patients treated with common therapeutics such as aminoglycoside antibiotics, loop diuretics or chemotherapeutics. A commonly used chemotherapeutic agent, cisplatin, is very effective for treating malignant tumors, but results in a majority of patients experiencing irreversible hearing loss and/or tinnitus. Additionally, since there is currently no FDA-approved treatments for SNHL, attenuation of ototoxicity is a major area of investigation in oncology, otolaryngology and hearing research. Several potential otoprotective agents have been investigated at the clinical trial stage, but none have progressed to a full FDA-approval. In this study, we investigated a combinatorial approach comprised of an antioxidant, a p53 inhibitor and a neurotrophin, as a multifactorial otoprotective treatment for cisplatin exposure. In vitro, HEI-OC1 cells, an immortalized organ of Corti epithelial cell line, pre-treated with this biotherapeutic cocktail had significantly reduced cisplatin-induced cell death, DNA fragmentation, and apoptotic activation. In an ex vivo study, rat pup D2-D3 organ of Corti explants, significant protection against cisplatin-based hair cell and neuronal loss was achieved by delivery of the same combinatorial pretreatment. Interestingly, the hair cell protection was localized to the basal and middle regions of the organ of Corti. Together, these findings highlight a novel approach to attenuate cisplatin ototoxicity and potentially prevent DIHL by addressing biological mechanisms of cisplatin ototoxicity.
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Affiliation(s)
- Nicole K Febles
- Department of Medical Engineering, University of South Florida, Tampa, FL 33620, USA; Global Center for Hearing and Speech Research, University of South Florida, Tampa, FL 33602, USA
| | - Mark A Bauer
- Department of Medical Engineering, University of South Florida, Tampa, FL 33620, USA; Global Center for Hearing and Speech Research, University of South Florida, Tampa, FL 33602, USA
| | - Bo Ding
- Department of Communicative Sciences and Disorders, University of South Florida, Tampa, FL 33602, USA; Global Center for Hearing and Speech Research, University of South Florida, Tampa, FL 33602, USA
| | - Xiaoxia Zhu
- Global Center for Hearing and Speech Research, University of South Florida, Tampa, FL 33602, USA
| | - Nathan D Gallant
- Department of Mechanical Engineering, University of South Florida, Tampa, FL 33602, USA.
| | - Robert D Frisina
- Department of Medical Engineering, University of South Florida, Tampa, FL 33620, USA; Department of Communicative Sciences and Disorders, University of South Florida, Tampa, FL 33602, USA; Global Center for Hearing and Speech Research, University of South Florida, Tampa, FL 33602, USA.
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Abstract
Vestibular hair cells are mechanosensory receptors that are capable of detecting changes in head position and thereby allow animals to maintain their posture and coordinate their movement. Vestibular hair cells are susceptible to ototoxic drugs, aging, and genetic factors that can lead to permanent vestibular dysfunction. Vestibular dysfunction mainly results from the injury of hair cells, which are located in the vestibular sensory epithelium. This review summarizes the mechanisms of different factors causing vestibular hair cell damage and therapeutic strategies to protect vestibular hair cells.
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Affiliation(s)
- Luoying Jiang
- ENT Institute and Department of Otorhinolaryngology, Eye and ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, 200031, China
| | - Zhiwei Zheng
- ENT Institute and Department of Otorhinolaryngology, Eye and ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, 200031, China
| | - Yingzi He
- ENT Institute and Department of Otorhinolaryngology, Eye and ENT Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200031, China.
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, 200031, China.
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Prayuenyong P, Baguley DM, Kros CJ, Steyger PS. Preferential Cochleotoxicity of Cisplatin. Front Neurosci 2021; 15:695268. [PMID: 34381329 PMCID: PMC8350121 DOI: 10.3389/fnins.2021.695268] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/06/2021] [Indexed: 11/26/2022] Open
Abstract
Cisplatin-induced ototoxicity in humans is more predominant in the cochlea than in the vestibule. Neither definite nor substantial vestibular dysfunction after cisplatin treatment has been consistently reported in the current literature. Inner ear hair cells seem to have intrinsic characteristics that make them susceptible to direct exposure to cisplatin. The existing literature suggests, however, that cisplatin might have different patterns of drug trafficking across the blood-labyrinth-barrier, or different degrees of cisplatin uptake to the hair cells in the cochlear and vestibular compartments. This review proposes an explanation for the preferential cochleotoxicity of cisplatin based on current evidence as well as the anatomy and physiology of the inner ear. The endocochlear potential, generated by the stria vascularis, acting as the driving force for hair cell mechanoelectrical transduction might also augment cisplatin entry into cochlear hair cells. Better understanding of the stria vascularis might shed new light on cochleotoxic mechanisms and inform the development of otoprotective interventions to moderate cisplatin associated ototoxicity.
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Affiliation(s)
- Pattarawadee Prayuenyong
- Department of Otorhinolaryngology, Head and Neck Surgery, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand.,Hearing Sciences, Division of Clinical Neurosciences, School of Medicine, University of Nottingham, Nottingham, United Kingdom
| | - David M Baguley
- Hearing Sciences, Division of Clinical Neurosciences, School of Medicine, University of Nottingham, Nottingham, United Kingdom.,National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham, United Kingdom.,Nottingham Audiology Services, Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - Corné J Kros
- School of Life Sciences, University of Sussex, Brighton, United Kingdom
| | - Peter S Steyger
- Translational Hearing Center, Biomedical Sciences, Creighton University, Omaha, NE, United States
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7
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Imbalance Associated With Cisplatin Chemotherapy in Adult Cancer Survivors: A Clinical Study. Otol Neurotol 2021; 42:e730-e734. [PMID: 33606465 DOI: 10.1097/mao.0000000000003079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE This study investigated balance problems and vestibular function in adult cancer survivors who had completed cisplatin chemotherapy treatment. STUDY DESIGN Observational cross-sectional study. SETTING Tertiary care center. PATIENTS Adult survivors of cancer who had completed cisplatin treatment. MAIN OUTCOME MEASURES Patient-reported balance symptoms were evaluated by a semistructured clinical interview. Patients underwent bedside clinical tests including Dynamic Visual Acuity test, Modified Clinical Testing of Sensory Interaction and Balance (CTSIB-m), and vibration sense testing to detect peripheral neuropathy. The video Head Impulse Test (vHIT) of all semicircular canals was performed. RESULTS Eleven of 65 patients (17%) reported some balance symptoms after cisplatin therapy, including vertigo, dizziness, unsteadiness, and falls. Vertigo was the most common balance symptom, reported by six patients (9.2%), and the clinical histories of these patients were consistent with benign paroxysmal positional vertigo. Three patients (5%) had abnormal results of the CTSIB-m test, and they were the same patients who reported falls. There was a significant association of peripheral neuropathy detected by vibration test and balance symptoms. All patients had normal vHIT results in all semicircular canals. CONCLUSIONS Balance symptoms after cisplatin treatment occurred in 17% of adult cancer survivors. Patients with peripheral neuropathy were more likely to have balance symptoms. The CTSIB-m test is a useful bedside physical examination to identify patients with a high risk of fall. Though there was no vestibular dysfunction detected by the vHIT in cancer survivors after cisplatin therapy, benign paroxysmal positional vertigo was relatively prevalent in this group of patients.
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Montardy Q, Wei M, Liu X, Yi T, Zhou Z, Lai J, Zhao B, Besnard S, Tighilet B, Chabbert C, Wang L. Selective optogenetic stimulation of glutamatergic, but not GABAergic, vestibular nuclei neurons induces immediate and reversible postural imbalance in mice. Prog Neurobiol 2021; 204:102085. [PMID: 34171443 DOI: 10.1016/j.pneurobio.2021.102085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 04/21/2021] [Accepted: 05/25/2021] [Indexed: 11/24/2022]
Abstract
Glutamatergic and GABAergic neurons represent the neural components of the medial vestibular nuclei. We assessed the functional role of glutamatergic and GABAergic neuronal pathways arising from the vestibular nuclei (VN) in the maintenance of gait and balance by optogenetically stimulating the VN in VGluT2-cre and GAD2-cre mice. We demonstrate that glutamatergic, but not GABAergic VN neuronal subpopulation is responsible for immediate and strong posturo-locomotor deficits, comparable to unilateral vestibular deafferentation models. During optogenetic stimulation, the support surface dramatically increased in VNVGluT2+ mice, and rapidly fell back to baseline after stimulation, whilst it remained unchanged during similar stimulation of VNGAD2+ mice. This effect persisted when vestibular tactilo kinesthesic plantar inputs were removed. Posturo-locomotor alterations evoked in VNVGluT2+ animals were still present immediately after stimulation, while they disappeared 1 h later. Overall, these results indicate a fundamental role for VNVGluT2+ neurons in balance and posturo-locomotor functions, but not for VNGAD2+ neurons, in this specific context. This new optogenetic approach will be useful to characterize the role of the different VN neuronal populations involved in vestibular physiology and pathophysiology.
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Affiliation(s)
- Q Montardy
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China; GDR Physiopathologie Vestibulaire - unité GDR2074 CNRS, France
| | - M Wei
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - X Liu
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China
| | - T Yi
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China
| | - Z Zhou
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China; McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - J Lai
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China
| | - B Zhao
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China
| | - S Besnard
- Aix Marseille University-CNRS, Laboratory of Sensory and Cognitive Neurosciences, UMR 7260, Team Pathophysiology and Therapy of Vestibular Disorders, Marseille, France; Université de Caen Normandie, CHU de Caen, Caen, France; GDR Physiopathologie Vestibulaire - unité GDR2074 CNRS, France
| | - B Tighilet
- Aix Marseille University-CNRS, Laboratory of Sensory and Cognitive Neurosciences, UMR 7260, Team Pathophysiology and Therapy of Vestibular Disorders, Marseille, France; GDR Physiopathologie Vestibulaire - unité GDR2074 CNRS, France.
| | - C Chabbert
- Aix Marseille University-CNRS, Laboratory of Sensory and Cognitive Neurosciences, UMR 7260, Team Pathophysiology and Therapy of Vestibular Disorders, Marseille, France; GDR Physiopathologie Vestibulaire - unité GDR2074 CNRS, France.
| | - L Wang
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, CAS Center for Excellence in Brain Science and Intelligence Technology, The Brain Cognition and Brain Disease Institute (BCBDI), Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, 518055, China.
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9
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Ingersoll MA, Malloy EA, Caster LE, Holland EM, Xu Z, Zallocchi M, Currier D, Liu H, He DZZ, Min J, Chen T, Zuo J, Teitz T. BRAF inhibition protects against hearing loss in mice. SCIENCE ADVANCES 2020; 6:6/49/eabd0561. [PMID: 33268358 PMCID: PMC7821884 DOI: 10.1126/sciadv.abd0561] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 10/20/2020] [Indexed: 05/13/2023]
Abstract
Hearing loss caused by noise, aging, antibiotics, and chemotherapy affects 10% of the world population, yet there are no Food and Drug Administration (FDA)-approved drugs to prevent it. Here, we screened 162 small-molecule kinase-specific inhibitors for reduction of cisplatin toxicity in an inner ear cell line and identified dabrafenib (TAFINLAR), a BRAF kinase inhibitor FDA-approved for cancer treatment. Dabrafenib and six additional kinase inhibitors in the BRAF/MEK/ERK cellular pathway mitigated cisplatin-induced hair cell death in the cell line and mouse cochlear explants. In adult mice, oral delivery of dabrafenib repressed ERK phosphorylation in cochlear cells, and protected from cisplatin- and noise-induced hearing loss. Full protection was achieved in mice with co-treatment with oral AZD5438, a CDK2 kinase inhibitor. Our study explores a previously unidentified cellular pathway and molecular target BRAF kinase for otoprotection and may advance dabrafenib into clinics to benefit patients with cisplatin- and noise-induced ototoxicity.
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Affiliation(s)
- Matthew A Ingersoll
- Department of Pharmacology and Neuroscience, School of Medicine, Creighton University, Omaha, NE 68178, USA
| | - Emma A Malloy
- Department of Pharmacology and Neuroscience, School of Medicine, Creighton University, Omaha, NE 68178, USA
| | - Lauryn E Caster
- Department of Pharmacology and Neuroscience, School of Medicine, Creighton University, Omaha, NE 68178, USA
| | - Eva M Holland
- Department of Pharmacology and Neuroscience, School of Medicine, Creighton University, Omaha, NE 68178, USA
| | - Zhenhang Xu
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, NE 68178, USA
- Department of Otolaryngology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Marisa Zallocchi
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, NE 68178, USA
| | - Duane Currier
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Huizhan Liu
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, NE 68178, USA
| | - David Z Z He
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, NE 68178, USA
| | - Jaeki Min
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Jian Zuo
- Department of Biomedical Sciences, School of Medicine, Creighton University, Omaha, NE 68178, USA
| | - Tal Teitz
- Department of Pharmacology and Neuroscience, School of Medicine, Creighton University, Omaha, NE 68178, USA.
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10
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Wu J, Ye J, Kong W, Zhang S, Zheng Y. Programmed cell death pathways in hearing loss: A review of apoptosis, autophagy and programmed necrosis. Cell Prolif 2020; 53:e12915. [PMID: 33047870 PMCID: PMC7653260 DOI: 10.1111/cpr.12915] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/23/2020] [Accepted: 09/09/2020] [Indexed: 02/05/2023] Open
Abstract
Programmed cell death (PCD)—apoptosis, autophagy and programmed necrosis—is any pathological form of cell death mediated by intracellular processes. Ototoxic drugs, ageing and noise exposure are some common pathogenic factors of sensorineural hearing loss (SNHL) that can induce the programmed death of auditory hair cells through different pathways, and eventually lead to the loss of hair cells. Furthermore, several mutations in apoptotic genes including DFNA5, DFNA51 and DFNB74 have been suggested to be responsible for the new functional classes of monogenic hearing loss (HL). Therefore, in this review, we elucidate the role of these three forms of PCD in different types of HL and discuss their guiding significance for HL treatment. We believe that further studies of PCD pathways are necessary to understand the pathogenesis of HL and guide scientists and clinicians to identify new drug targets for HL treatment.
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Affiliation(s)
- Junhao Wu
- Department of Otolaryngology, Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Jing Ye
- College of Biomedical Engineering, Sichuan University, Chengdu, China
| | - Weili Kong
- Department of Otolaryngology, Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Shouyue Zhang
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Yun Zheng
- Department of Otolaryngology, Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, China
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11
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Qian F, Wang X, Yin Z, Xie G, Yuan H, Liu D, Chai R. The slc4a2b gene is required for hair cell development in zebrafish. Aging (Albany NY) 2020; 12:18804-18821. [PMID: 33044947 PMCID: PMC7732325 DOI: 10.18632/aging.103840] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 07/06/2020] [Indexed: 01/24/2023]
Abstract
Hair cells (HCs) function as important sensory receptors that can detect movement in their immediate environment. HCs in the inner ear can sense acoustic signals, while in aquatic vertebrates HCs can also detect movements, vibrations, and pressure gradients in the surrounding water. Many genes are responsible for the development of HCs, and developmental defects in HCs can lead to hearing loss and other sensory dysfunctions. Here, we found that the solute carrier family 4, member 2b (slc4a2b) gene, which is a member of the anion-exchange family, is expressed in the otic vesicles and lateral line neuromasts in developing zebrafish embryos. An in silico analysis showed that the slc4a2b is evolutionarily conserved, and we found that loss of function of slc4a2b resulted in a decreased number of HCs in zebrafish neuromasts due to increased HC apoptosis. Taken together, we conclude that slc4a2b plays a critical role in the development of HCs in zebrafish.
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Affiliation(s)
- Fuping Qian
- MOE Key Laboratory of Developmental Genes and Human Disease, School of Life Science and Technology, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Southeast University, Nanjing 210096, China
| | - Xin Wang
- School of Life Sciences, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong 226019, China
| | - Zhenhua Yin
- School of Life Sciences, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong 226019, China
| | - Gangcai Xie
- Medical School, Nantong University, Nantong 226019, China
| | - Huijun Yuan
- Medical Genetics Center, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Dong Liu
- School of Life Sciences, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong 226019, China
| | - Renjie Chai
- MOE Key Laboratory of Developmental Genes and Human Disease, School of Life Science and Technology, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Southeast University, Nanjing 210096, China,School of Life Sciences, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong 226019, China,Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China,Beijing Key Laboratory of Neural Regeneration and Repair, Capital Medical University, Beijing 100069, China
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12
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Chang H, Tu TY, Wu CS, Kuo TY, Huang CY. Is the risk of idiopathic sudden sensorineural hearing loss higher in nasopharyngeal carcinoma than in hypopharyngeal cancer? A population-based study. J Chin Med Assoc 2020; 83:865-869. [PMID: 32221154 PMCID: PMC7478193 DOI: 10.1097/jcma.0000000000000314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND The aim of this study was to compare the risk of developing sudden sensorineural hearing loss (SSHL) in patients with hypopharyngeal cancer with that in patients with nasopharyngeal carcinoma (NPC). METHODS A population-based, retrospective cohort study was performed using the Taiwan National Health Research Database databank. Patients selected for this study were diagnosed with hypopharyngeal cancer or NPC and treated with radiotherapy in the period from 2001 to 2004. Routine follow-up was conducted for 8 years (2004-2012), and the incidence of SSHL was calculated at the final follow-up. RESULTS There was no significant difference in the risk of developing SSHL between the hypopharyngeal cancer group and its control group (p = 1.000). In hypopharyngeal cancer and NPC groups, the rates of SSHL were 0.12% and 1.00%, respectively (p < 0.001). The cumulative hazard of SSHL during the follow-up period was significantly higher in the NPC group than in the control group (p < 0.001). CONCLUSION Radiotherapy in patients with hypopharyngeal cancer did not increase the risk of developing SSHL, but postirradiation NPC was significantly associated with an increased incidence of SSHL.
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Affiliation(s)
- Hung Chang
- Department of Otolaryngology Head Neck Surgery, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
| | - Tzong-Yang Tu
- Department of Otolaryngology Head Neck Surgery, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
- School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Chuan-Song Wu
- Department of Otolaryngology, Taipei City Hospital, Taipei, Taiwan, ROC
- College of Science and Engineering, and Graduate School of Business Administration, Fu-Jen Catholic University, New Taipei City, Taiwan, ROC
| | - Ting-Yu Kuo
- Department of Otolaryngology Head Neck Surgery, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
- School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Chii-Yuan Huang
- Department of Otolaryngology Head Neck Surgery, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
- School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC
- Address correspondence. Dr. Chii-Yuan Huang, Department of Otolaryngology, Head & Neck Surgery, Taipei Veterans General Hospital, 201, Section 2, Shi-Pai Road, Taipei 112, Taiwan, ROC. E-mail address: (C.-Y. Huang)
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13
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Gentilin E, Simoni E, Candito M, Cazzador D, Astolfi L. Cisplatin-Induced Ototoxicity: Updates on Molecular Targets. Trends Mol Med 2019; 25:1123-1132. [DOI: 10.1016/j.molmed.2019.08.002] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 07/26/2019] [Accepted: 08/02/2019] [Indexed: 12/20/2022]
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14
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Calabro KR, Boye SL, Choudhury S, Fajardo D, Peterson JJ, Li W, Crosson SM, Kim MJ, Ding D, Salvi R, Someya S, Boye SE. A Novel Mouse Model of MYO7A USH1B Reveals Auditory and Visual System Haploinsufficiencies. Front Neurosci 2019; 13:1255. [PMID: 31824252 PMCID: PMC6883748 DOI: 10.3389/fnins.2019.01255] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 11/05/2019] [Indexed: 12/20/2022] Open
Abstract
Usher’s syndrome is the most common combined blindness–deafness disorder with USH1B, caused by mutations in MYO7A, resulting in the most severe phenotype. The existence of numerous, naturally occurring shaker1 mice harboring variable MYO7A mutations on different genetic backgrounds has complicated the characterization of MYO7A knockout (KO) and heterozygote mice. We generated a novel MYO7A KO mouse (Myo7a–/–) that is easily genotyped, maintained, and confirmed to be null for MYO7A in both the eye and inner ear. Like USH1B patients, Myo7a–/– mice are profoundly deaf, and display near complete loss of inner and outer cochlear hair cells (HCs). No gross structural changes were observed in vestibular HCs. Myo7a–/– mice exhibited modest declines in retinal function but, unlike patients, no loss of retinal structure. We attribute the latter to differential expression of MYO7A in mouse vs. primate retina. Interestingly, heterozygous Myo7a+/– mice had reduced numbers of cochlear HCs and concomitant reductions in auditory function relative to Myo7a+/+ controls. Notably, this is the first report that loss of a single Myo7a allele significantly alters auditory structure and function and suggests that audiological characterization of USH1B carriers is warranted. Maintenance of vestibular HCs in Myo7a–/– mice suggests that gene replacement could be used to correct the vestibular dysfunction in USH1B patients. While Myo7a–/– mice do not exhibit sufficiently robust retinal phenotypes to be used as a therapeutic outcome measure, they can be used to assess expression of vectored MYO7A on a null background and generate valuable pre-clinical data toward the treatment of USH1B.
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Affiliation(s)
- Kaitlyn R Calabro
- Department of Ophthalmology, University of Florida, Gainesville, FL, United States
| | - Sanford L Boye
- Department of Pediatrics, University of Florida, Gainesville, FL, United States
| | - Shreyasi Choudhury
- Department of Ophthalmology, University of Florida, Gainesville, FL, United States
| | - Diego Fajardo
- Department of Ophthalmology, University of Florida, Gainesville, FL, United States
| | - James J Peterson
- Department of Ophthalmology, University of Florida, Gainesville, FL, United States
| | - Wei Li
- Department of Ophthalmology, University of Florida, Gainesville, FL, United States
| | - Sean M Crosson
- Department of Ophthalmology, University of Florida, Gainesville, FL, United States
| | - Mi-Jung Kim
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, United States
| | - Dalian Ding
- Department of Communicative Disorders and Sciences, The State University of New York at Buffalo, Buffalo NY, United States
| | - Richard Salvi
- Department of Communicative Disorders and Sciences, The State University of New York at Buffalo, Buffalo NY, United States
| | - Shinichi Someya
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, United States
| | - Shannon E Boye
- Department of Ophthalmology, University of Florida, Gainesville, FL, United States
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15
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Evans ES, Ketcham CJ, Hibberd JC, Cullen ME, Basiliere JG, Murphy DL. Examination of clinical and laboratory measures of static and dynamic balance in breast cancer survivors. Physiother Theory Pract 2019; 37:1199-1209. [DOI: 10.1080/09593985.2019.1692391] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Elizabeth S. Evans
- Department of Physical Therapy Education, Elon University, Elon, NC, USA
| | | | - Julie C. Hibberd
- Department of Physical Therapy Education, Elon University, Elon, NC, USA
- Department of Exercise Science, Elon University, Elon, NC, USA
| | | | | | - Dorriea L. Murphy
- Department of Physical Therapy Education, Elon University, Elon, NC, USA
- Department of Rehabilitation Services, Alamance Regional Medical Center, Burlington, NC, USA
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16
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Bielefeld EC, Harrison RT, Riley DeBacker J. Pharmaceutical otoprotection strategies to prevent impulse noise-induced hearing loss. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2019; 146:3790. [PMID: 31795721 DOI: 10.1121/1.5132285] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
One of the ongoing challenges for hearing researchers is successful protection of the ear from noise injury. For decades, the most effective methods have been based on modifying the acoustic properties of the noise, either by reducing noise output from various sources, interfering in the acoustic exposure path with environmental controls, or altering the noise dose for the individual with personal hearing protection devices. Because of the inefficiencies of some of the acoustic modification procedures, pharmaceutical otoprotection is targeted at making the cochlea less susceptible to injury. Short-duration, high-level impulse noises, typically caused by small-scale explosions, cause different sets of injuries in the ear than long-duration, low-variance noise exposures. Therefore, the expectation is that the ears exposed to impulse noise may need different pharmaceutical interventions, both in type of compounds used and the time course of administration of the compounds. The current review discusses four different classes of compounds that have been tested as impulse noise otoprotectants. In the process of describing those experiments, particular emphasis is placed on the acoustic properties of the impulses used, with the goal of providing context for evaluating the relevance of these different models to human impulse noise-induced hearing loss.
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Affiliation(s)
- Eric C Bielefeld
- Department of Speech and Hearing Science, The Ohio State University, 110 Pressey Hall, 1070 Carmack Road, Columbus, Ohio 43220, USA
| | - Ryan T Harrison
- Department of Speech and Hearing Science, The Ohio State University, 110 Pressey Hall, 1070 Carmack Road, Columbus, Ohio 43220, USA
| | - J Riley DeBacker
- Department of Speech and Hearing Science, The Ohio State University, 110 Pressey Hall, 1070 Carmack Road, Columbus, Ohio 43220, USA
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17
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Sun F, Wang J, Wu X, Yang CS, Zhang J. Selenium nanoparticles act as an intestinal p53 inhibitor mitigating chemotherapy-induced diarrhea in mice. Pharmacol Res 2019; 149:104475. [PMID: 31593755 DOI: 10.1016/j.phrs.2019.104475] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 09/21/2019] [Accepted: 10/01/2019] [Indexed: 12/27/2022]
Abstract
Selenium, at high-dose levels approaching its toxicity, protects tissues from dose-limiting toxicities of many cancer chemotherapeutics without compromising their therapeutic effects on tumors, there by allowing the delivery of higher chemotherapeutic doses to achieve increased cure rate. In this regard, selenium nanoparticles (SeNPs), which show the lowest toxicity among extensively investigated selenium compounds including methylselenocysteine and selenomethionine, are more promising for application. The key issue remains to be resolved is whether low-toxicity SeNPs possess a selective protective mechanism. p53 or p53-regulated thrombospondin-1 has each been confirmed to be an appropriate target for therapeutic suppression to reduce side effects of anticancer therapy. The present study demonstrated that SeNPs transiently suppressed the expression of many intestinal p53-associated genes in healthy mice. SeNPs did not interfere with tumor-suppressive effect of nedaplatin, a cisplatin analogue; however, effectively reduced nedaplatin-evoked diarrhea. Nedaplatin-induced diarrhea was associated with activation of intestinal p53 and high expression of intestinal thrombospondin-1. The preventive effect of SeNPs on nedaplatin-induced diarrhea was correlated with a powerful concomitant suppression of p53 and thrombospondin-1. Moreover, the high-dose SeNPs used in the present study did not suppress growth nor caused liver and kidney injuries as well as alterations of hematological parameters in healthy mice. Overall, the present study reveals that chemotherapeutic selectivity conferred by SeNPs involves a dual suppression of two well-documented targets, the p53 and thrombospondin-1, providing mechanistic and pharmacologic insights on low-toxicity SeNPs as a potential chemoprotectant for mitigating chemotherapy-induced diarrhea.
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Affiliation(s)
- Feng Sun
- Laboratory of Redox Biology, School of Tea & Food Science, State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, China
| | - Jiajia Wang
- Laboratory of Redox Biology, School of Tea & Food Science, State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, China
| | - Ximing Wu
- Laboratory of Redox Biology, School of Tea & Food Science, State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, China
| | - Chung S Yang
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Jinsong Zhang
- Laboratory of Redox Biology, School of Tea & Food Science, State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, China.
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18
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Tropitzsch A, Müller M, Paquet-Durand F, Mayer F, Kopp HG, Schrattenholz A, Müller A, Löwenheim H. Poly (ADP-Ribose) Polymerase-1 (PARP1) Deficiency and Pharmacological Inhibition by Pirenzepine Protects From Cisplatin-Induced Ototoxicity Without Affecting Antitumor Efficacy. Front Cell Neurosci 2019; 13:406. [PMID: 31551715 PMCID: PMC6746891 DOI: 10.3389/fncel.2019.00406] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 08/23/2019] [Indexed: 12/17/2022] Open
Abstract
Cisplatin remains an indispensable drug for the systemic treatment of many solid tumors. However, a major dose-limiting side-effect is ototoxicity. In some scenarios, such as treatment of germ cell tumors or adjuvant therapy of non-small cell lung cancer, cisplatin cannot be replaced without undue loss of efficacy. Inhibition of polyadenosine diphosphate-ribose polymerase-1 (PARP1), is presently being evaluated as a novel anti-neoplastic principle. Of note, cisplatin-induced PARP1 activation has been related to inner ear cell death. Thus, PARP1 inhibition may exert a protective effect on the inner ear without compromising the antitumor activity of cisplatin. Here, we evaluated PARP1 deficiency and PARP1 pharmacological inhibition as a means to protect the auditory hair cells from cisplatin-mediated ototoxicity. We demonstrate that cisplatin-induced loss of sensory hair cells in the organ of Corti is attenuated in PARP1-deficient cochleae. The PARP inhibitor pirenzepine and its metabolite LS-75 mimicked the protective effect observed in PARP1-deficient cochleae. Moreover, the cytotoxic potential of cisplatin was unchanged by PARP inhibition in two different cancer cell lines. Taken together, the results from our study suggest that the negative side-effects of cisplatin anti-cancer treatment could be alleviated by a PARP inhibition adjunctive therapy.
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Affiliation(s)
- Anke Tropitzsch
- Department of Otorhinolaryngology, Head and Neck Surgery, Tübingen Hearing Research Center, University of Tübingen Medical Center, Tübingen, Germany
| | - Marcus Müller
- Department of Otorhinolaryngology, Head and Neck Surgery, Tübingen Hearing Research Center, University of Tübingen Medical Center, Tübingen, Germany
| | - François Paquet-Durand
- Cell Death Mechanisms Lab, Institute for Ophthalmic Research, University of Tübingen, Tübingen, Germany
| | - Frank Mayer
- Department of Oncology, Hematology, Immunology, Rheumatology and Pulmology, University of Tübingen Medical Center, Tübingen, Germany
| | - Hans-Georg Kopp
- Department of Oncology, Hematology, Immunology, Rheumatology and Pulmology, University of Tübingen Medical Center, Tübingen, Germany
| | | | - Andrea Müller
- Department of Otorhinolaryngology, Head and Neck Surgery, Tübingen Hearing Research Center, University of Tübingen Medical Center, Tübingen, Germany
| | - Hubert Löwenheim
- Department of Otorhinolaryngology, Head and Neck Surgery, Tübingen Hearing Research Center, University of Tübingen Medical Center, Tübingen, Germany
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19
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Qi L, Luo Q, Zhang Y, Jia F, Zhao Y, Wang F. Advances in Toxicological Research of the Anticancer Drug Cisplatin. Chem Res Toxicol 2019; 32:1469-1486. [PMID: 31353895 DOI: 10.1021/acs.chemrestox.9b00204] [Citation(s) in RCA: 183] [Impact Index Per Article: 36.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cisplatin is one of the most widely used chemotherapeutic agents for various solid tumors in the clinic due to its high efficacy and broad spectrum. The antineoplastic activity of cisplatin is mainly due to its ability to cross-link with DNA, thus blocking transcription and replication. Unfortunately, the clinical use of cisplatin is limited by its severe, dose-dependent toxic side effects. There are approximately 40 specific toxicities of cisplatin, among which nephrotoxicity is the most common one. Other common side effects include ototoxicity, neurotoxicity, gastrointestinal toxicity, hematological toxicity, cardiotoxicity, and hepatotoxicity. These side effects together reduce the life quality of patients and require lowering the dosage of the drug, even stopping administration, thus weakening the treatment effect. Few effective measures exist clinically against these side effects because the exact mechanisms of various side effects from cisplatin remain still unclear. Therefore, substantial effort has been made to explore the complicated biochemical processes involved in the toxicology of cisplatin, aiming to identify effective ways to reduce or eradicate its toxicity. This review summarizes and reviews the updated advances in the toxicological research of cisplatin. We anticipate to provide insights into the understanding of the mechanisms underlying the side effects of cisplatin and designing comprehensive therapeutic strategies involving cisplatin.
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Affiliation(s)
- Luyu Qi
- Beijing National Laboratory for Molecular Sciences; National Centre for Mass Spectrometry in Beijing; CAS Key Laboratory of Analytical Chemistry for Living Biosystems , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , P.R. China.,University of Chinese Academy of Sciences , Beijing 100049 , P.R. China
| | - Qun Luo
- Beijing National Laboratory for Molecular Sciences; National Centre for Mass Spectrometry in Beijing; CAS Key Laboratory of Analytical Chemistry for Living Biosystems , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , P.R. China.,University of Chinese Academy of Sciences , Beijing 100049 , P.R. China
| | - Yanyan Zhang
- Beijing National Laboratory for Molecular Sciences; National Centre for Mass Spectrometry in Beijing; CAS Key Laboratory of Analytical Chemistry for Living Biosystems , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , P.R. China
| | - Feifei Jia
- Beijing National Laboratory for Molecular Sciences; National Centre for Mass Spectrometry in Beijing; CAS Key Laboratory of Analytical Chemistry for Living Biosystems , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , P.R. China
| | - Yao Zhao
- Beijing National Laboratory for Molecular Sciences; National Centre for Mass Spectrometry in Beijing; CAS Key Laboratory of Analytical Chemistry for Living Biosystems , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , P.R. China
| | - Fuyi Wang
- Beijing National Laboratory for Molecular Sciences; National Centre for Mass Spectrometry in Beijing; CAS Key Laboratory of Analytical Chemistry for Living Biosystems , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , P.R. China.,University of Chinese Academy of Sciences , Beijing 100049 , P.R. China.,Basic Medical College , Shandong University of Chinese Traditional Medicine , Jinan 250355 , P.R. China
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20
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Rybak LP, Dhukhwa A, Mukherjea D, Ramkumar V. Local Drug Delivery for Prevention of Hearing Loss. Front Cell Neurosci 2019; 13:300. [PMID: 31338024 PMCID: PMC6629775 DOI: 10.3389/fncel.2019.00300] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 06/19/2019] [Indexed: 12/20/2022] Open
Abstract
Systemic delivery of therapeutics for targeting the cochlea to prevent or treat hearing loss is challenging. Systemic drugs have to cross the blood-labyrinth barrier (BLB). BLB can significantly prevent effective penetration of drugs in appropriate concentrations to protect against hearing loss caused by inflammation, ototoxic drugs, or acoustic trauma. This obstacle may be obviated by local administration of protective agents. This route can deliver higher concentration of drug compared to systemic application and preclude systemic side effects. Protective agents have been administered by intra-tympanic injection in numerous preclinical studies. Drugs such as steroids, etanercept, D and L-methionine, pifithrin-alpha, adenosine agonists, melatonin, kenpaullone (a cyclin-dependent kinase 2 (CDK2) inhibitor) have been reported to show efficacy against cisplatin ototoxicity in animal models. Several siRNAs have been shown to ameliorate cisplatin ototoxicity when administered by intra-tympanic injection. The application of corticosteroids and a number of other drugs with adjuvants appears to enhance efficacy. Administration of siRNAs to knock down AMPK kinase, liver kinase B1 (LKB1) or G9a in the cochlea have been found to ameliorate noise-induced hearing loss. The local administration of these compounds appears to be effective in protecting the cochlea against damage from cisplatin or noise trauma. Furthermore the intra-tympanic route yields maximum protection in the basal turn of the cochlea which is most vulnerable to cisplatin ototoxicity and noise trauma. There appears to be very little transfer of these agents to the systemic circulation. This would avoid potential side effects including interference with anti-tumor efficacy of cisplatin. Nanotechnology offers strategies to effectively deliver protective agents to the cochlea. This review summarizes the pharmacology of local drug delivery by intra-tympanic injection to prevent hearing loss caused by cisplatin and noise exposure in animals. Future refinements in local protective agents provide exciting prospects for amelioration of hearing loss resulting from cisplatin or noise exposure.
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Affiliation(s)
- Leonard P Rybak
- Department of Otolaryngology, School of Medicine, Southern Illinois University, Springfield, IL, United States.,Department of Pharmacology, School of Medicine, Southern Illinois University, Springfield, IL, United States
| | - Asmita Dhukhwa
- Department of Pharmacology, School of Medicine, Southern Illinois University, Springfield, IL, United States
| | - Debashree Mukherjea
- Department of Otolaryngology, School of Medicine, Southern Illinois University, Springfield, IL, United States
| | - Vickram Ramkumar
- Department of Pharmacology, School of Medicine, Southern Illinois University, Springfield, IL, United States
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21
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Yang A, Liu F, Guan B, Luo Z, Lin J, Fang W, Liu L, Zuo W. p53 induces miR-199a-3p to suppress mechanistic target of rapamycin activation in cisplatin-induced acute kidney injury. J Cell Biochem 2019; 120:17625-17634. [PMID: 31148231 DOI: 10.1002/jcb.29030] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 04/17/2019] [Accepted: 04/18/2019] [Indexed: 11/07/2022]
Abstract
How p53 participates in acute kidney injury (AKI) progress and what are the underlying mechanisms remain illusive. For this issue, it is important to probe into the role of p53 in cisplatin-induced AKI. We find that p53 was upregulated in cisplatin-induced AKI, yet, pifithrin-α inhibites the p53 expression to attenuated renal injury and cell apoptosis both in vivo cisplatin-induced AKI mice and in vitro HK-2 human renal tubular epithelial cells. To knock down p53 by siRNA significantly decreased the miRNA, miR-199a-3p, expression in HK-2 cells. Blockade of miR-199a-3p significantly reduced cisplatin-induced cell apoptosis and inhibited caspase-3 activity. Mechanistically, we identified that miR-199a-3p directly bound to mechanistic target of rapamycin (mTOR) 3'-untranslated region and overexpressed miR-199a-3p reduce the expression and phosphorylation of mTOR. Furthermore, we demonstrated that p53 inhibited mTOR activation through activating miR-199a-3p. In conclusion, our findings reveal that p53, upregulating the expression of miR-199a-3p affects the progress of cisplatin-induced AKI, which might provide a promising therapeutic target of AKI.
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Affiliation(s)
- Aicheng Yang
- Department of Nephrology, The Affiliated Jiangmen TCM Hospital of Jinan University, Jiangmen, Guangdong, P. R. China
| | - Fanna Liu
- Department of Nephrology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, P. R. China
| | - Baozhang Guan
- Department of Nephrology, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, P. R. China
| | - Zhi Luo
- Department of Nephrology, The Affiliated Jiangmen TCM Hospital of Jinan University, Jiangmen, Guangdong, P. R. China
| | - Jiehua Lin
- Department of Nephrology, The Affiliated Jiangmen TCM Hospital of Jinan University, Jiangmen, Guangdong, P. R. China
| | - Wan Fang
- Department of Acupuncture Moxibustion and Massage, Hunan University of Chinese Medicine, Changsha, Hunan, P.R. China
| | - Longhui Liu
- Department of Acupuncture Moxibustion and Massage, Hunan University of Chinese Medicine, Changsha, Hunan, P.R. China
| | - Wanli Zuo
- Department of Nephrology, The Affiliated Jiangmen TCM Hospital of Jinan University, Jiangmen, Guangdong, P. R. China
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22
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Castañeda R, Natarajan S, Jeong SY, Hong BN, Kang TH. Traditional oriental medicine for sensorineural hearing loss: Can ethnopharmacology contribute to potential drug discovery? JOURNAL OF ETHNOPHARMACOLOGY 2019; 231:409-428. [PMID: 30439402 DOI: 10.1016/j.jep.2018.11.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 11/06/2018] [Accepted: 11/06/2018] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE In Traditional Oriental Medicine (TOM), the development of hearing pathologies is related to an inadequate nourishment of the ears by the kidney and other organs involved in regulation of bodily fluids and nutrients. Several herbal species have historically been prescribed for promoting the production of bodily fluids or as antiaging agents to treat deficiencies in hearing. AIM OF REVIEW The prevalence of hearing loss has been increasing in the last decade and is projected to grow considerably in the coming years. Recently, several herbal-derived products prescribed in TOM have demonstrated a therapeutic potential for acquired sensorineural hearing loss and tinnitus. Therefore, the aims of this review are to provide a comprehensive overview of the current known efficacy of the herbs used in TOM for preventing different forms of acquired sensorineural hearing loss and tinnitus, and associate the traditional principle with the demonstrated pharmacological mechanisms to establish a solid foundation for directing future research. METHODS The present review collected the literature related to herbs used in TOM or related compounds on hearing from Chinese, Korean, and Japanese herbal classics; library catalogs; and scientific databases (PubMed, Scopus, Google Scholar; and Science Direct). RESULTS This review shows that approximately 25 herbal species and 40 active compounds prescribed in TOM for hearing loss and tinnitus have shown in vitro or in vivo beneficial effects for acquired sensorineural hearing loss produced by noise, aging, ototoxic drugs or diabetes. The inner ear is highly vulnerable to ischemia and oxidative damage, where several TOM agents have revealed a direct effect on the auditory system by normalizing the blood supply to the cochlea and increasing the antioxidant defense in sensory hair cells. These strategies have shown a positive impact on maintaining the inner ear potential, sustaining the production of endolymph, reducing the accumulation of toxic and inflammatory substances, preventing sensory cell death and preserving sensory transmission. There are still several herbal species with demonstrated therapeutic efficacy whose mechanisms have not been deeply studied and others that have been traditionally used in hearing loss but have not been tested experimentally. In clinical studies, Ginkgo biloba, Panax ginseng, and Astragalus propinquus have demonstrated to improve hearing thresholds in patients with sensorineural hearing loss and alleviated the symptoms of tinnitus. However, some of these clinical studies have been limited by small sample sizes, lack of an adequate control group or contradictory results. CONCLUSIONS Current therapeutic strategies have proven that the goal of the traditional oriental medicine principle of increasing bodily fluids is a relevant approach for reducing the development of hearing loss by improving microcirculation in the blood-labyrinth barrier and increasing cochlear blood flow. The potential benefits of TOM agents expand to a multi-target approach on different auditory structures of the inner ear related to increased cochlear blood flow, antioxidant, anti-inflammatory, anti-apoptotic and neuroprotective activities. However, more research is required, given the evidence is very limited in terms of the mechanism of action at the preclinical in vivo level and the scarce number of clinical studies published.
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Affiliation(s)
- Rodrigo Castañeda
- Graduate School of Biotechnology, Kyung Hee University, Republic of Korea; Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Global Campus, Gyeonggi, Republic of Korea.
| | - Sathishkumar Natarajan
- Graduate School of Biotechnology, Kyung Hee University, Republic of Korea; Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Global Campus, Gyeonggi, Republic of Korea.
| | - Seo Yule Jeong
- Graduate School of Biotechnology, Kyung Hee University, Republic of Korea; Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Global Campus, Gyeonggi, Republic of Korea.
| | - Bin Na Hong
- Graduate School of Biotechnology, Kyung Hee University, Republic of Korea.
| | - Tong Ho Kang
- Graduate School of Biotechnology, Kyung Hee University, Republic of Korea; Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Global Campus, Gyeonggi, Republic of Korea.
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23
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Necroptosis and Apoptosis Contribute to Cisplatin and Aminoglycoside Ototoxicity. J Neurosci 2019; 39:2951-2964. [PMID: 30733218 DOI: 10.1523/jneurosci.1384-18.2019] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 01/23/2019] [Accepted: 01/30/2019] [Indexed: 11/21/2022] Open
Abstract
Ototoxic side effects of cisplatin and aminoglycosides have been extensively studied, but no therapy is available to date. Sensory hair cells, upon exposure to cisplatin or aminoglycosides, undergo apoptotic and necrotic cell death. Blocking these cell death pathways has therapeutic potential in theory, but incomplete protection and lack of therapeutic targets in the case of necrosis, has hampered the development of clinically applicable drugs. Over the past decade, a novel form of necrosis, termed necroptosis, was established as an alternative cell death pathway. Necroptosis is distinguished from passive necrotic cell death, in that it follows a cellular program, involving the receptor-interacting protein kinase (RIPK) 1 and RIPK3. In this study, we used pharmacological and genetic interventions in the mouse to test the relative contributions of necroptosis and caspase-8-mediated apoptosis toward cisplatin and aminoglycoside ototoxicity. We find that ex vivo, only apoptosis contributes to cisplatin and aminoglycoside ototoxicity, while in vivo, necroptosis as well as apoptosis are involved in both sexes. Inhibition of necroptosis and apoptosis using pharmacological compounds is thus a viable strategy to ameliorate aminoglycoside and cisplatin ototoxicity.SIGNIFICANCE STATEMENT The clinical application of cisplatin and aminoglycosides is limited due to ototoxic side effects. Here, using pharmaceutical and genetic intervention, we present evidence that two types of programmed cell death, apoptosis and necroptosis, contribute to aminoglycoside and cisplatin ototoxicity. Key molecular factors mediating necroptosis are well characterized and druggable, presenting new avenues for pharmaceutical intervention.
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24
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Bielefeld EC, Markle A, DeBacker JR, Harrison RT. Chronotolerance for cisplatin ototoxicity in the rat. Hear Res 2018; 370:16-21. [DOI: 10.1016/j.heares.2018.09.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 09/07/2018] [Accepted: 09/14/2018] [Indexed: 01/17/2023]
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25
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Quinoxaline protects zebrafish lateral line hair cells from cisplatin and aminoglycosides damage. Sci Rep 2018; 8:15119. [PMID: 30310154 PMCID: PMC6181994 DOI: 10.1038/s41598-018-33520-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 10/01/2018] [Indexed: 01/13/2023] Open
Abstract
Hair cell (HC) death is the leading cause of hearing and balance disorders in humans. It can be triggered by multiple insults, including noise, aging, and treatment with certain therapeutic drugs. As society becomes more technologically advanced, the source of noise pollution and the use of drugs with ototoxic side effects are rapidly increasing, posing a threat to our hearing health. Although the underlying mechanism by which ototoxins affect auditory function varies, they share common intracellular byproducts, particularly generation of reactive oxygen species. Here, we described the therapeutic effect of the heterocyclic compound quinoxaline (Qx) against ototoxic insults in zebrafish HCs. Animals incubated with Qx were protected against the deleterious effects of cisplatin and gentamicin, and partially against neomycin. In the presence of Qx, there was a reduction in the number of TUNEL-positive HCs. Since Qx did not block the mechanotransduction channels, based on FM1-43 uptake and microphonic potentials, this implies that Qx’s otoprotective effect is at the intracellular level. Together, these results unravel a novel therapeutic role for Qx as an otoprotective drug against the deleterious side effects of cisplatin and aminoglycosides, offering an alternative option for patients treated with these compounds.
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26
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Zhang J, Sun H, Salvi R, Ding D. Paraquat initially damages cochlear support cells leading to anoikis-like hair cell death. Hear Res 2018; 364:129-141. [PMID: 29563067 PMCID: PMC5984146 DOI: 10.1016/j.heares.2018.03.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 02/20/2018] [Accepted: 03/09/2018] [Indexed: 12/11/2022]
Abstract
Paraquat (PQ), one of the most widely used herbicides, is extremely dangerous because it generates the highly toxic superoxide radical. When paraquat was applied to cochlear organotypic cultures, it not only damaged the outer hair cells (OHCs) and inner hair cells (IHCs), but also caused dislocation of the hair cell rows. We hypothesized that the dislocation arose from damage to the support cells (SCs) that anchors hair cells within the epithelium. To test this hypothesis, rat postnatal cochlear cultures were treated with PQ. Shortly after PQ treatment, the rows of OHCs separated from one another and migrated radially away from IHCs suggesting loss of cell-cell adhesion that hold the hair cells in proper alignment. Hair cells dislocation was associated with extensive loss of SCs in the organ of Corti, loss of tympanic border cells (TBCs) beneath the basilar membrane, the early appearance of superoxide staining and caspase-8 labeling in SCs below the OHCs and disintegration of E-cadherin and β-catenin in the organ of Corti. Damage to the TBCs and SCs occurred prior to loss of OHC or IHC loss suggesting a form of detachment-induced apoptosis referred to as anoikis.
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Affiliation(s)
- Jianhui Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, Xiangya Hospital, Central South University, China; Center for Hearing and Deafness, University at Buffalo, Buffalo, NY, 14214, USA
| | - Hong Sun
- Department of Otorhinolaryngology Head and Neck Surgery, Xiangya Hospital, Central South University, China; Center for Hearing and Deafness, University at Buffalo, Buffalo, NY, 14214, USA
| | - Richard Salvi
- Department of Otorhinolaryngology Head and Neck Surgery, Xiangya Hospital, Central South University, China; Center for Hearing and Deafness, University at Buffalo, Buffalo, NY, 14214, USA; Department of Audiology and Speech-Language Pathology, Asia University, Taichung, Taiwan, ROC
| | - Dalian Ding
- Department of Otorhinolaryngology Head and Neck Surgery, Xiangya Hospital, Central South University, China; Center for Hearing and Deafness, University at Buffalo, Buffalo, NY, 14214, USA.
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27
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Teitz T, Fang J, Goktug AN, Bonga JD, Diao S, Hazlitt RA, Iconaru L, Morfouace M, Currier D, Zhou Y, Umans RA, Taylor MR, Cheng C, Min J, Freeman B, Peng J, Roussel MF, Kriwacki R, Guy RK, Chen T, Zuo J. CDK2 inhibitors as candidate therapeutics for cisplatin- and noise-induced hearing loss. J Exp Med 2018. [PMID: 29514916 PMCID: PMC5881471 DOI: 10.1084/jem.20172246] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Hearing loss caused by aging, noise, cisplatin toxicity, or other insults affects 360 million people worldwide, but there are no Food and Drug Administration-approved drugs to prevent or treat it. We screened 4,385 small molecules in a cochlear cell line and identified 10 compounds that protected against cisplatin toxicity in mouse cochlear explants. Among them, kenpaullone, an inhibitor of multiple kinases, including cyclin-dependent kinase 2 (CDK2), protected zebrafish lateral-line neuromasts from cisplatin toxicity and, when delivered locally, protected adult mice and rats against cisplatin- and noise-induced hearing loss. CDK2-deficient mice displayed enhanced resistance to cisplatin toxicity in cochlear explants and to cisplatin- and noise-induced hearing loss in vivo. Mechanistically, we showed that kenpaullone directly inhibits CDK2 kinase activity and reduces cisplatin-induced mitochondrial production of reactive oxygen species, thereby enhancing cell survival. Our experiments have revealed the proapoptotic function of CDK2 in postmitotic cochlear cells and have identified promising therapeutics for preventing hearing loss.
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Affiliation(s)
- Tal Teitz
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN
| | - Jie Fang
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN
| | - Asli N Goktug
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN
| | - Justine D Bonga
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN
| | - Shiyong Diao
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN
| | - Robert A Hazlitt
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN
| | - Luigi Iconaru
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN.,Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN
| | - Marie Morfouace
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, Memphis, TN
| | - Duane Currier
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN
| | - Yinmei Zhou
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN
| | - Robyn A Umans
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN
| | - Michael R Taylor
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN
| | - Cheng Cheng
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN
| | - Jaeki Min
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN
| | - Burgess Freeman
- Preclinical PK Shared Resource, St. Jude Children's Research Hospital, Memphis, TN
| | - Junmin Peng
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN.,Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN
| | - Martine F Roussel
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, Memphis, TN
| | - Richard Kriwacki
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN
| | - R Kiplin Guy
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN
| | - Jian Zuo
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN
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28
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Sánchez-Rodríguez C, Cuadrado E, Riestra-Ayora J, Sanz-Fernández R. Polyphenols protect against age-associated apoptosis in female rat cochleae. Biogerontology 2018; 19:159-169. [PMID: 29363005 DOI: 10.1007/s10522-018-9747-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 01/18/2018] [Indexed: 01/13/2023]
Abstract
Dietary antioxidants, polyphenols, have been found to be beneficial in protecting against the generation of oxidative stress in various diseases associated with aging. Age-related hearing loss (AHL) is the number one neurodegenerative disorder on our aged population. Sprague-Dawley rats divided into five groups according to their age (3, 6, 12, 18 and 24 months old) and treated with 100 mg/day/kg body weight of polyphenols were used. Then, cochleae were harvested to measure caspase activities (- 3, - 8 and - 9), caspase-3 gene expression, ATP levels, Bax, BcL-2 and p53 levels. 8-OHdG levels (marker of DNA oxidative damage) and annexin-V were also measured in cochleae. Increased levels of caspase-3 and 9 in cochlea were observed with age and this effect was attenuated by polyphenol treatment. In addition, ATP and Bcl-2 levels in older rats were recovered after administration of polyphenols, while Bax and p53 levels protein decreased. Oral supplementation with polyphenols also reduces DNA oxidative damage of cochlear cell. Treatment with polyphenols inhibits the activation of age-related apoptotic signaling by decreasing oxidative stress inside the rat cochlea.
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Affiliation(s)
| | - Esperanza Cuadrado
- Department of biochemistry, University Hospital of Getafe, Carretera de Toledo, km 12, Getafe, 500, Madrid, Spain
| | - Juan Riestra-Ayora
- European University of Madrid, Calle del Tajo S/N, Villaviciosa de Odón, 28670, Madrid, Spain
- Department of Otolaryngology, University Hospital of Getafe, Carretera de Toledo, km 12, Getafe, 500, Madrid, Spain
| | - Ricardo Sanz-Fernández
- European University of Madrid, Calle del Tajo S/N, Villaviciosa de Odón, 28670, Madrid, Spain
- Department of Otolaryngology, University Hospital of Getafe, Carretera de Toledo, km 12, Getafe, 500, Madrid, Spain
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29
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Sheth S, Mukherjea D, Rybak LP, Ramkumar V. Mechanisms of Cisplatin-Induced Ototoxicity and Otoprotection. Front Cell Neurosci 2017; 11:338. [PMID: 29163050 PMCID: PMC5663723 DOI: 10.3389/fncel.2017.00338] [Citation(s) in RCA: 221] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 10/12/2017] [Indexed: 12/20/2022] Open
Abstract
Evidence of significant hearing loss during the early days of use of cisplatin as a chemotherapeutic agent in cancer patients has stimulated research into the causes and treatment of this side effect. It has generally been accepted that hearing loss is produced by excessive generation of reactive oxygen species (ROS) in cell of the cochlea, which led to the development of various antioxidants as otoprotective agents. Later studies show that ROS could stimulate cochlear inflammation, suggesting the use of anti-inflammatory agents for treatment of hearing loss. In this respect, G-protein coupled receptors, such as adenosine A1 receptor and cannabinoid 2 receptors, have shown efficacy in the treatment of hearing loss in experimental animals by increasing ROS scavenging, suppressing ROS generation, or by decreasing inflammation. Inflammation could be triggered by activation of transient receptor potential vanilloid 1 (TRPV1) channels in the cochlea and possibly other TRP channels. Targeting TRPV1 for knockdown has also been shown to be a useful strategy for ensuring otoprotection. Cisplatin entry into cochlear hair cells is mediated by various transporters, inhibitors of which have been shown to be effective for treating hearing loss. Finally, cisplatin-induced DNA damage and activation of the apoptotic process could be targeted for cisplatin-induced hearing loss. This review focuses on recent development in our understanding of the mechanisms underlying cisplatin-induced hearing loss and provides examples of how drug therapies have been formulated based on these mechanisms.
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Affiliation(s)
- Sandeep Sheth
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL, United States
| | - Debashree Mukherjea
- Department of Surgery (Otolaryngology), Southern Illinois University School of Medicine, Springfield, IL, United States
| | - Leonard P Rybak
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL, United States.,Department of Surgery (Otolaryngology), Southern Illinois University School of Medicine, Springfield, IL, United States
| | - Vickram Ramkumar
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL, United States
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30
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Guthrie OW. Functional consequences of inducible genetic elements from the p53 SOS response in a mammalian organ system. Exp Cell Res 2017; 359:50-61. [DOI: 10.1016/j.yexcr.2017.08.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 08/02/2017] [Accepted: 08/05/2017] [Indexed: 10/19/2022]
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31
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Nicholas BD, Francis S, Wagner EL, Zhang S, Shin JB. Protein Synthesis Inhibition and Activation of the c-Jun N-Terminal Kinase Are Potential Contributors to Cisplatin Ototoxicity. Front Cell Neurosci 2017; 11:303. [PMID: 29033791 PMCID: PMC5627031 DOI: 10.3389/fncel.2017.00303] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 09/12/2017] [Indexed: 11/29/2022] Open
Abstract
Cisplatin has been regarded as an effective and versatile chemotherapeutic agent for nearly 40 years. Though the associated dose-dependent ototoxicity is known, the cellular mechanisms by which cochleovestibular hair cell death occur are not well understood. We have previously shown that aminoglycoside ototoxicity is mediated in part by cytosolic protein synthesis inhibition. Despite a lack of molecular similarity, aminoglycosides were shown to elicit similar stress pathways to cisplatin. We therefore reasoned that there may be some role of protein synthesis inhibition in cisplatin ototoxicity. Employing a modification of the bioorthogonal noncanonical amino acid tagging (BONCAT) method, we evaluated the effects of cisplatin on cellular protein synthesis. We show that cisplatin inhibits cellular protein synthesis in organ of Corti explant cultures. Similar to what was found after gentamicin exposure, cisplatin activates both the c-Jun N-terminal kinase (JNK) and mammalian target of rapamycin (mTOR) pathways. In contrast to aminoglycosides, cisplatin also inhibits protein synthesis in all cochlear cell types. We further demonstrate that the multikinase inhibitor sorafenib completely prevents JNK activation, while providing only moderate hair cell protection. Simultaneous stimulation of cellular protein synthesis by insulin, however, significantly improved hair cell survival in culture. The presented data provides evidence for a potential role of protein synthesis inhibition in cisplatin-mediated ototoxicity.
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Affiliation(s)
- Brian D Nicholas
- Department of Neuroscience, University of Virginia, Charlottesville, VA, United States
| | - Shimon Francis
- Department of Neuroscience, University of Virginia, Charlottesville, VA, United States
| | - Elizabeth L Wagner
- Department of Neuroscience, University of Virginia, Charlottesville, VA, United States
| | - Sibo Zhang
- Department of Neuroscience, University of Virginia, Charlottesville, VA, United States
| | - Jung-Bum Shin
- Department of Neuroscience, University of Virginia, Charlottesville, VA, United States
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32
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Benkafadar N, Menardo J, Bourien J, Nouvian R, François F, Decaudin D, Maiorano D, Puel JL, Wang J. Reversible p53 inhibition prevents cisplatin ototoxicity without blocking chemotherapeutic efficacy. EMBO Mol Med 2017; 9:7-26. [PMID: 27794029 PMCID: PMC5210089 DOI: 10.15252/emmm.201606230] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Cisplatin is a widely used chemotherapy drug, despite its significant ototoxic side effects. To date, the mechanism of cisplatin‐induced ototoxicity remains unclear, and hearing preservation during cisplatin‐based chemotherapy in patients is lacking. We found activation of the ATM‐Chk2‐p53 pathway to be a major determinant of cisplatin ototoxicity. However, prevention of cisplatin‐induced ototoxicity is hampered by opposite effects of ATM activation upon sensory hair cells: promoting both outer hair cell death and inner hair cell survival. Encouragingly, however, genetic or pharmacological ablation of p53 substantially attenuated cochlear cell apoptosis, thus preserving hearing. Importantly, systemic administration of a p53 inhibitor in mice bearing patient‐derived triple‐negative breast cancer protected auditory function, without compromising the anti‐tumor efficacy of cisplatin. Altogether, these findings highlight a novel and effective strategy for hearing protection in cisplatin‐based chemotherapy.
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Affiliation(s)
- Nesrine Benkafadar
- INSERM - UMR 1051, Institut des Neurosciences de Montpellier, Montpellier, France.,Université de Montpellier, Montpellier, France
| | - Julien Menardo
- INSERM - UMR 1051, Institut des Neurosciences de Montpellier, Montpellier, France.,Université de Montpellier, Montpellier, France
| | - Jérôme Bourien
- INSERM - UMR 1051, Institut des Neurosciences de Montpellier, Montpellier, France.,Université de Montpellier, Montpellier, France
| | - Régis Nouvian
- INSERM - UMR 1051, Institut des Neurosciences de Montpellier, Montpellier, France.,Université de Montpellier, Montpellier, France
| | - Florence François
- INSERM - UMR 1051, Institut des Neurosciences de Montpellier, Montpellier, France.,Université de Montpellier, Montpellier, France
| | - Didier Decaudin
- Laboratoire d'Investigation Pré -Clinique/Service d'Hématologie Clinique, Institut Curie, Paris, France
| | | | - Jean-Luc Puel
- INSERM - UMR 1051, Institut des Neurosciences de Montpellier, Montpellier, France.,Université de Montpellier, Montpellier, France
| | - Jing Wang
- INSERM - UMR 1051, Institut des Neurosciences de Montpellier, Montpellier, France .,Université de Montpellier, Montpellier, France
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33
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Allicin protects against cisplatin-induced vestibular dysfunction by inhibiting the apoptotic pathway. Eur J Pharmacol 2017; 805:108-117. [DOI: 10.1016/j.ejphar.2017.02.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 02/26/2017] [Accepted: 02/28/2017] [Indexed: 12/11/2022]
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34
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Péricat D, Farina A, Agavnian-Couquiaud E, Chabbert C, Tighilet B. Complete and irreversible unilateral vestibular loss: A novel rat model of vestibular pathology. J Neurosci Methods 2017; 283:83-91. [DOI: 10.1016/j.jneumeth.2017.04.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 03/26/2017] [Accepted: 04/01/2017] [Indexed: 01/10/2023]
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35
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Callejo A, Durochat A, Bressieux S, Saleur A, Chabbert C, Domènech Juan I, Llorens J, Gaboyard-Niay S. Dose-dependent cochlear and vestibular toxicity of trans-tympanic cisplatin in the rat. Neurotoxicology 2017; 60:1-9. [PMID: 28223157 DOI: 10.1016/j.neuro.2017.02.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 02/10/2017] [Accepted: 02/10/2017] [Indexed: 11/18/2022]
Abstract
In vivo studies are needed to study cisplatin ototoxicity and to evaluate candidate protective treatments. Rats and mice are the preferred species for toxicological and pharmacological pre-clinical research, but systemic administration of cisplatin causes high morbidity in these species. We hypothesized that trans-tympanic administration of cisplatin would provide a good model for studying its auditory and vestibular toxicity in the rat. Cisplatin was administered by the trans-tympanic route in one ear (50μl, 0.5-2mg/ml) of rats of both sexes and two different strains. Cochlear toxicity was corroborated by histological means. Vestibular toxicity was demonstrated by behavioral and histological analysis. Cisplatin concentrations were assessed in inner ear after trans-tympanic and i.v. administration. In all experiments, no lethality and only scant body weight loss were recorded. Cisplatin caused dose-dependent cochlear toxicity, as demonstrated by hair cell counts in the apical and middle turns of the cochlea, and vestibular toxicity, as demonstrated by behavioral analysis and hair cell counts in utricles. High concentrations of cisplatin were found in the inner ear after trans-tympanic administration. In comparison, i.v. administration resulted in lower inner ear concentrations. We conclude that trans-tympanic administration provides an easy, reproducible and safe model to study the cochlear and vestibular toxicity of cisplatin in the rat. This route of exposure may be useful to address particular questions on cisplatin induced ototoxicity and to test candidate protective treatments.
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Affiliation(s)
- Angela Callejo
- Departament de Ciències Fisiològiques, Universitat de Barcelona, 08907 L'Hospitalet de Llobregat, Catalonia, Spain; Unitat Funcional d'Otorinolaringologia i Al·lèrgia, Institut Universtiari Dexeus, 08028 Barcelona, Catalonia, Spain
| | | | | | | | | | - Ivan Domènech Juan
- Unitat Funcional d'Otorinolaringologia i Al·lèrgia, Institut Universtiari Dexeus, 08028 Barcelona, Catalonia, Spain; Institut de Neurociències, Universitat de Barcelona, Catalonia, Spain
| | - Jordi Llorens
- Departament de Ciències Fisiològiques, Universitat de Barcelona, 08907 L'Hospitalet de Llobregat, Catalonia, Spain; Institut de Neurociències, Universitat de Barcelona, Catalonia, Spain; Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), 08907 L'Hospitalet de Llobregat, Catalonia, Spain.
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Laos M, Sulg M, Herranen A, Anttonen T, Pirvola U. Indispensable role of Mdm2/p53 interaction during the embryonic and postnatal inner ear development. Sci Rep 2017; 7:42216. [PMID: 28181574 PMCID: PMC5299844 DOI: 10.1038/srep42216] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 01/05/2017] [Indexed: 02/06/2023] Open
Abstract
p53 is a key component of a signaling network that protects cells against various stresses. As excess p53 is detrimental to cells, its levels are tightly controlled by several mechanisms. The E3 ubiquitin ligase Mdm2 is a major negative regulator of p53. The significance of balanced p53 levels in normal tissues, at different stages of lifetime, is poorly understood. We have studied in vivo how the disruption of Mdm2/p53 interaction affects the early-embryonic otic progenitor cells and their descendants, the auditory supporting cells and hair cells. We found that p53 accumulation, as a consequence of Mdm2 abrogation, is lethal to both proliferative progenitors and non-proliferating, differentiating cells. The sensitivity of postmitotic supporting cells to excess p53 decreases along maturation, suggesting that maturation-related mechanisms limit p53′s transcriptional activity towards pro-apoptotic factors. We have also investigated in vitro whether p53 restricts supporting cell’s regenerative capacity. Unlike in several other regenerative cellular models, p53 inactivation did not alter supporting cell’s proliferative quiescence nor transdifferentiation capacity. Altogether, the postmitotic status of developing hair cells and supporting cells does not confer protection against the detrimental effects of p53 upregulation. These findings might be linked to auditory disturbances observed in developmental syndromes with inappropriate p53 upregulation.
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Affiliation(s)
- M Laos
- Division of Physiology and Neuroscience, Department of Biosciences, University of Helsinki, 00014 Helsinki, Finland
| | - M Sulg
- Division of Physiology and Neuroscience, Department of Biosciences, University of Helsinki, 00014 Helsinki, Finland
| | - A Herranen
- Division of Physiology and Neuroscience, Department of Biosciences, University of Helsinki, 00014 Helsinki, Finland
| | - T Anttonen
- Division of Physiology and Neuroscience, Department of Biosciences, University of Helsinki, 00014 Helsinki, Finland
| | - U Pirvola
- Division of Physiology and Neuroscience, Department of Biosciences, University of Helsinki, 00014 Helsinki, Finland
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Zeng S, Sun X, Chen Z, Yu D, Chen B, Yin S. Low, but Not High, Doses of Cisplatin Damage Cochlear Hair Cells in C57 Mouse Organotypic Cultures. ORL J Otorhinolaryngol Relat Spec 2016; 78:177-86. [PMID: 27270730 DOI: 10.1159/000446189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 04/12/2016] [Indexed: 11/19/2022]
Abstract
AIMS The purpose of this study was to investigate the characteristics of cisplatin-induced C57 mouse cochlear hair cell damage in vitro. METHODS Forty-seven cochleae harvested from 2- to 4-day-old C57 mice were used. Forty specimens were treated with different concentrations of cisplatin (10, 25, 50, 100, 400, and 1,000 μmol/l) for 48 h. The remaining seven specimens were used as a control group. RESULTS The rate of hair cell loss increased from 14.5 to 78.4% over cisplatin concentrations of 10 to 100 μmol/l, whereas hair cell loss decreased to 48.8 and 8.77% at concentrations of 400 and 1,000 μmol/l, respectively. Apoptosis was detected by DAPI staining in the areas of hair cell damage. Hair cell loss rates differed significantly among the cisplatin-treated groups. Linear regression analysis of cisplatin dose versus hair cell number showed a significant negative correlation for cisplatin doses up to 100 μmol/l and a positive correlation with further increases up to 1,000 μmol/l. CONCLUSIONS We conclude that cisplatin-induced hair cell damage was concentration dependent only up to a certain dose and that injury resistance may occur in cochlear cells treated with higher doses of cisplatin.
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Affiliation(s)
- Shan Zeng
- Department of Otorhinolaryngology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Brosel S, Laub C, Averdam A, Bender A, Elstner M. Molecular aging of the mammalian vestibular system. Ageing Res Rev 2016; 26:72-80. [PMID: 26739358 DOI: 10.1016/j.arr.2015.12.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 12/16/2015] [Accepted: 12/21/2015] [Indexed: 12/18/2022]
Abstract
Dizziness and imbalance frequently affect the elderly and contribute to falls and frailty. In many geriatric patients, clinical testing uncovers a dysfunction of the vestibular system, but no specific etiology can be identified. Neuropathological studies have demonstrated age-related degeneration of peripheral and central vestibular neurons, but the molecular mechanisms are poorly understood. In contrast, recent studies into age-related hearing loss strongly implicate mitochondrial dysfunction, oxidative stress and apoptotic cell death of cochlear hair cells. While some data suggest that analogous biological pathomechanisms may underlie vestibular dysfunction, actual proof is missing. In this review, we summarize the available data on the molecular causes of vestibular dysfunction.
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Affiliation(s)
- Sonja Brosel
- German Center for Vertigo and Balance Disorders, Department of Neurology, Klinikum Grosshadern, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany.
| | - Christoph Laub
- Department of Neurology with Friedrich-Baur-Institute, Klinikum Grosshadern, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany
| | - Anne Averdam
- Department of Neurology with Friedrich-Baur-Institute, Klinikum Grosshadern, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany
| | - Andreas Bender
- Department of Neurology, Therapiezentrum Burgau, Kapuzinerstr.34, 89331 Burgau, Germany
| | - Matthias Elstner
- Department of Neurology with Friedrich-Baur-Institute, Klinikum Grosshadern, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany; Department of Neurology and Clinical Neurophysiology, Academic Hospital Munich-Bogenhausen, Technical University of Munich, Englschalkingerstr. 77, 81925 Munich, Germany
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Teitz T, Goktug AN, Chen T, Zuo J. Development of Cell-Based High-Throughput Chemical Screens for Protection Against Cisplatin-Induced Ototoxicity. Methods Mol Biol 2016; 1427:419-30. [PMID: 27259939 DOI: 10.1007/978-1-4939-3615-1_22] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Various compounds have been tested in recent years for protection against cisplatin-induced hearing loss, but no compound has yet been FDA approved for clinical use in patients. Towards this goal, we developed an unbiased, high-throughput, mammalian cochlear cell-based chemical screen that allowed quantification of the protection ability of bioactive compounds and ranked them for future testing ex vivo in cochlear explant cultures and in vivo in animal models. In our primary screens, protection in the HEI-OC1 organ of Corti immortalized cell line was measured by the ability of each compound to inhibit caspase-3/7 activity triggered by cisplatin treatment (50 μM cisplatin for 22 h). A total of 4385 unique bioactive compounds were tested in a single dose of 8 μM and promising compounds were validated by dose response curves covering ten, 1:3 serial diluted concentrations. Primary hits were defined as having more than 60 % inhibition of the caspase-3/7 activity. Toxicity of the top compounds was measured by a CellTiter-Glo (CTG) assay that measured the viability of the cells in the presence of compound alone in similar dose responsive analysis. A combination of the caspase-3/7 inhibition activity assay (as measured by IC50) and the CTG viability assay (as determined by LD50) identified the top protective compounds in the HEI-OC1 cells. In the future, the top hits in our screens will be tested for their protective ability ex vivo in mouse cochlear explants and in vivo in animal models. Our mammalian cochlear cell-based, high-throughput chemical screening assays described here can be further modified and represent an initial successful step towards therapeutic intervention of hearing disorders, an unmet medical need of our society.
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Affiliation(s)
- Tal Teitz
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Asli N Goktug
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Jian Zuo
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA.
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Zheng T, Lu Y. SIRT1 Protects Human Lens Epithelial Cells Against Oxidative Stress by Inhibiting p53-Dependent Apoptosis. Curr Eye Res 2015; 41:1068-1075. [DOI: 10.3109/02713683.2015.1093641] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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41
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Santabarbara G, Maione P, Rossi A, Gridelli C. Pharmacotherapeutic options for treating adverse effects of Cisplatin chemotherapy. Expert Opin Pharmacother 2015; 17:561-70. [DOI: 10.1517/14656566.2016.1122757] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kim SJ, Park C, Lee JN, Lim H, Hong GY, Moon SK, Lim DJ, Choe SK, Park R. Erdosteine protects HEI-OC1 auditory cells from cisplatin toxicity through suppression of inflammatory cytokines and induction of Nrf2 target proteins. Toxicol Appl Pharmacol 2015; 288:192-202. [DOI: 10.1016/j.taap.2015.07.014] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 06/30/2015] [Accepted: 07/16/2015] [Indexed: 12/20/2022]
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Kim HJ, Pandit A, Oh GS, Shen A, Lee SB, Khadka D, Lee S, Shim H, Yang SH, Cho EY, Kwak TH, Choe SK, Park R, So HS. Dunnione ameliorates cisplatin ototoxicity through modulation of NAD(+) metabolism. Hear Res 2015; 333:235-246. [PMID: 26341473 DOI: 10.1016/j.heares.2015.08.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Revised: 08/25/2015] [Accepted: 08/27/2015] [Indexed: 12/14/2022]
Abstract
Ototoxicity is an important issue in patients receiving cisplatin chemotherapy. Numerous studies have demonstrated that cisplatin-induced ototoxicity is related to oxidative stress and DNA damage. However, the precise mechanism underlying cisplatin-associated ototoxicity is still unclear. The cofactor nicotinamide adenine dinucleotide (NAD(+)) has emerged as an important regulator of energy metabolism and cellular homeostasis. Here, we demonstrate that the levels and activities of sirtuin-1 (SIRT1) are suppressed by the reduction of intracellular NAD(+) levels in cisplatin-mediated ototoxicity. We provide evidence that the decreases in SIRT1 activity and expression facilitated by increasing poly(ADP-ribose) polymerase-1 (PARP-1) activation and microRNA-34a levels through cisplatin-mediated p53 activation aggravate the associated ototoxicity. Furthermore, we show that the induction of cellular NAD(+) levels using dunnione, which targets intracellular NQO1, prevents the toxic effects of cisplatin through the regulation of PARP-1 and SIRT1 activity. These results suggest that direct modulation of cellular NAD(+) levels by pharmacological agents could be a promising therapeutic approach for protection from cisplatin-induced ototoxicity.
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Affiliation(s)
- Hyung-Jin Kim
- Center for Metabolic Function Regulation & Department of Microbiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Arpana Pandit
- Center for Metabolic Function Regulation & Department of Microbiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Gi-Su Oh
- Center for Metabolic Function Regulation & Department of Microbiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - AiHua Shen
- Center for Metabolic Function Regulation & Department of Microbiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Su-Bin Lee
- Center for Metabolic Function Regulation & Department of Microbiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Dipendra Khadka
- Center for Metabolic Function Regulation & Department of Microbiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - SeungHoon Lee
- Center for Metabolic Function Regulation & Department of Microbiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Hyeok Shim
- Department of Internal Medicine, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Sei-Hoon Yang
- Department of Internal Medicine, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Eun-Young Cho
- Department of Internal Medicine, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Tae Hwan Kwak
- PAEAN Biotechnology, 160 Techno-2 Street, Yuseong-gu, Daejeon, 305-500, Republic of Korea
| | - Seong-Kyu Choe
- Center for Metabolic Function Regulation & Department of Microbiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Raekil Park
- Center for Metabolic Function Regulation & Department of Microbiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Hong-Seob So
- Center for Metabolic Function Regulation & Department of Microbiology, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, Republic of Korea.
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Callejo A, Sedó-Cabezón L, Juan ID, Llorens J. Cisplatin-Induced Ototoxicity: Effects, Mechanisms and Protection Strategies. TOXICS 2015; 3:268-293. [PMID: 29051464 PMCID: PMC5606684 DOI: 10.3390/toxics3030268] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Revised: 07/08/2015] [Accepted: 07/09/2015] [Indexed: 12/11/2022]
Abstract
Cisplatin is a highly effective chemotherapeutic agent that is widely used to treat solid organ malignancies. However, serious side effects have been associated with its use, such as bilateral, progressive, irreversible, dose-dependent neurosensory hearing loss. Current evidence indicates that cisplatin triggers the production of reactive oxygen species in target tissues in the inner ear. A variety of agents that protect against cisplatin-induced ototoxicity have been successfully tested in cell culture and animal models. However, many of them interfere with the therapeutic effect of cisplatin, and therefore are not suitable for systemic administration in clinical practice. Consequently, local administration strategies, namely intratympanic administration, have been developed to achieve otoprotection, without reducing the antitumoral effect of cisplatin. While a considerable amount of pre-clinical information is available, clinical data on treatments to prevent cisplatin ototoxicity are only just beginning to appear. This review summarizes clinical and experimental studies of cisplatin ototoxicity, and focuses on understanding its toxicity mechanisms, clinical repercussions and prevention strategies.
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Affiliation(s)
- Angela Callejo
- Unitat Funcional d'Otorrinolaringologia i Al·lèrgia, Institut Universtiari Quirón Dexeus, 08028 Barcelona, Catalonia, Spain.
| | - Lara Sedó-Cabezón
- Departament de Ciències Fisiològiques II, Universitat de Barcelona, 08907 L'Hospitalet de Llobregat, Catalonia, Spain.
| | - Ivan Domènech Juan
- Unitat Funcional d'Otorrinolaringologia i Al·lèrgia, Institut Universtiari Quirón Dexeus, 08028 Barcelona, Catalonia, Spain.
- Servei d'Otorrinolaringologia, Hospital Universitario de Bellvitge, 08907 L'Hospitalet de Llobregat, Catalonia, Spain.
| | - Jordi Llorens
- Departament de Ciències Fisiològiques II, Universitat de Barcelona, 08907 L'Hospitalet de Llobregat, Catalonia, Spain.
- Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), 08907 L'Hospitalet de Llobregat, Catalonia, Spain.
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Karasawa T, Steyger PS. An integrated view of cisplatin-induced nephrotoxicity and ototoxicity. Toxicol Lett 2015; 237:219-27. [PMID: 26101797 DOI: 10.1016/j.toxlet.2015.06.012] [Citation(s) in RCA: 324] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 06/06/2015] [Accepted: 06/14/2015] [Indexed: 12/20/2022]
Abstract
Cisplatin is one of the most widely-used drugs to treat cancers. However, its nephrotoxic and ototoxic side-effects remain major clinical limitations. Recent studies have improved our understanding of the molecular mechanisms of cisplatin-induced nephrotoxicity and ototoxicity. While cisplatin binding to DNA is the major cytotoxic mechanism in proliferating (cancer) cells, nephrotoxicity and ototoxicity appear to result from toxic levels of reactive oxygen species and protein dysregulation within various cellular compartments. In this review, we discuss molecular mechanisms of cisplatin-induced nephrotoxicity and ototoxicity. We also discuss potential clinical strategies to prevent nephrotoxicity and ototoxicity and their current limitations.
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Affiliation(s)
- Takatoshi Karasawa
- Oregon Hearing Research Center, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239, United States
| | - Peter S Steyger
- Oregon Hearing Research Center, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239, United States.
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Cockayne syndrome group B (Csb) and group a (Csa) deficiencies predispose to hearing loss and cochlear hair cell degeneration in mice. J Neurosci 2015; 35:4280-6. [PMID: 25762674 DOI: 10.1523/jneurosci.5063-14.2015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Sensory hair cells in the cochlea, like most neuronal populations that are postmitotic, terminally differentiated, and non-regenerating, depend on robust mechanisms of self-renewal for lifelong survival. We report that hair cell homeostasis requires a specific sub-branch of the DNA damage nucleotide excision repair pathway, termed transcription-coupled repair (TCR). Cockayne syndrome (CS), caused by defects in TCR, is a rare DNA repair disorder with a broad clinical spectrum that includes sensorineural hearing loss. We tested hearing and analyzed the cellular integrity of the organ of Corti in two mouse models of this disease with mutations in the Csb gene (CSB(m/m) mice) and Csa gene (Csa(-/-) mice), respectively. Csb(m/m) and Csa(-/-) mice manifested progressive hearing loss, as measured by an increase in auditory brainstem response thresholds. In contrast to wild-type mice, mutant mice showed reduced or absent otoacoustic emissions, suggesting cochlear outer hair cell impairment. Hearing loss in Csb(m/m) and Csa(-/-) mice correlated with progressive hair cell loss in the base of the organ of Corti, starting between 6 and 13 weeks of age, which increased by 16 weeks of age in a basal-to-apical gradient, with outer hair cells more severely affected than inner hair cells. Our data indicate that the hearing loss observed in CS patients is reproduced in mouse models of this disease. We hypothesize that accumulating DNA damage, secondary to the loss of TCR, contributes to susceptibility to hearing loss.
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Kim HJ, Oh GS, Shen A, Lee SB, Khadka D, Pandit A, Shim H, Yang SH, Cho EY, Song J, Kwak TH, Choe SK, Park R, So HS. Nicotinamide adenine dinucleotide: An essential factor in preserving hearing in cisplatin-induced ototoxicity. Hear Res 2015; 326:30-9. [PMID: 25891352 DOI: 10.1016/j.heares.2015.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 04/07/2015] [Indexed: 12/20/2022]
Abstract
Ototoxicity is an important issue in patients receiving cisplatin chemotherapy. Numerous studies have demonstrated that several mechanisms, including oxidative stress, DNA damage, and inflammatory responses, are closely associated with cisplatin-induced ototoxicity. Although much attention has been directed at identifying ways to protect the inner ear from cisplatin-induced damage, the precise underlying mechanisms have not yet been elucidated. The cofactor nicotinamide adenine dinucleotide (NAD(+)) has emerged as an important regulator of cellular energy metabolism and homeostasis. NAD(+) acts as a cofactor for various enzymes including sirtuins (SIRTs) and poly(ADP-ribose) polymerases (PARPs), and therefore, maintaining adequate NAD(+) levels has therapeutic benefits because of its effect on NAD(+)-dependent enzymes. Recent studies demonstrated that disturbance in intracellular NAD(+) levels is critically involved in cisplatin-induced cochlear damage associated with oxidative stress, DNA damage, and inflammatory responses. In this review, we describe the importance of NAD(+) in cisplatin-induced ototoxicity and discuss potential strategies for the prevention or treatment of cisplatin-induced ototoxicity with a particular focus on NAD(+)-dependent cellular pathways.
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Affiliation(s)
- Hyung-Jin Kim
- Center for Metabolic Function Regulation & Department of Microbiology, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Gi-Su Oh
- Center for Metabolic Function Regulation & Department of Microbiology, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - AiHua Shen
- Center for Metabolic Function Regulation & Department of Microbiology, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Su-Bin Lee
- Center for Metabolic Function Regulation & Department of Microbiology, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Dipendra Khadka
- Center for Metabolic Function Regulation & Department of Microbiology, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Arpana Pandit
- Center for Metabolic Function Regulation & Department of Microbiology, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Hyeok Shim
- Department of Internal Medicine, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Sei-Hoon Yang
- Department of Internal Medicine, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Eun-Young Cho
- Department of Internal Medicine, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Jeho Song
- Department of Sports Industry and Welfare, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Tae Hwan Kwak
- PAEAN Biotechnology, 160 Techno-2 Street, Yuseong-gu, Daejeon, 305-500, Republic of Korea
| | - Seong-Kyu Choe
- Center for Metabolic Function Regulation & Department of Microbiology, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Raekil Park
- Center for Metabolic Function Regulation & Department of Microbiology, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea
| | - Hong-Seob So
- Center for Metabolic Function Regulation & Department of Microbiology, School of Medicine, Wonkwang University, Iksan, Jeonbuk, 570-749, Republic of Korea.
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Bielefeld EC. Protection from noise-induced hearing loss with Src inhibitors. Drug Discov Today 2015; 20:760-5. [PMID: 25637168 DOI: 10.1016/j.drudis.2015.01.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 12/09/2014] [Accepted: 01/20/2015] [Indexed: 01/23/2023]
Abstract
Noise-induced hearing loss is a major cause of acquired hearing loss around the world and pharmacological approaches to protecting the ear from noise are under investigation. Noise results in a combination of mechanical and metabolic damage pathways in the cochlea. The Src family of protein tyrosine kinases could be active in both pathways and Src inhibitors have successfully prevented noise-induced cochlear damage and hearing loss in animal models. The long-term goal is to optimize delivery methods into the cochlea to reduce invasiveness and limit side-effects before human clinical testing can be considered. At their current early stage of research investigation, Src inhibitors represent an exciting class of compounds for inclusion in a multifaceted pharmacological approach to protecting the ear from noise.
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Affiliation(s)
- Eric C Bielefeld
- Department of Speech and Hearing Science, The Ohio State University, 110 Pressey Hall, 1070 Carmack Road, Columbus, OH 43210, USA.
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Eren E, Başoğlu MS, Kulduk E, Şimsek F, İnan S. Mucosal trauma induced apoptosis in guinea pig middle ear: comparision of hemostatic agents. Int J Pediatr Otorhinolaryngol 2014; 78:2222-8. [PMID: 25458164 DOI: 10.1016/j.ijporl.2014.10.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 10/05/2014] [Accepted: 10/10/2014] [Indexed: 11/17/2022]
Abstract
OBJECTIVE The aim of this study is to compare the effects of the absorbable gelatin sponge (AGS), microporous polysaccharide hemospheres (MPH), and Ankaferd on wound healing after middle ear trauma and to evaluate their ototoxicity in an experimental guinea pig model. METHODS Middle ear mucosal trauma was created in 21 healthy adult guinea pigs. MPH, Ankaferd, and AGS were applied into the right tympanic bulla of the guinea pigs (7 ears for each treatment modality). The left ears of the seven animals were used as the sham group. At the fourth postoperative week (28-30 days), the guinea pigs were decapitated. Apoptosis was investigated, and the expression of Bcl-xl, Apaf, p53, cytochrome 3, and caspase 3 were evaluated. RESULTS The Ankaferd and AGS groups demonstrated significantly lower epithelial thickness, inflammation, and capillary dilatation than did the control group (p<0.001, <0.001, /0.001, <0.001/, 0.005, and 0.005, respectively). A statistically significant decrease in Bcl-xl staining was observed in the middle ears of animals treated with MPH (p=0.003). There was significantly higher caspase 3 expression in the Ankaferd and AGS groups than in the control group (p<0.001 and p=0.002, respectively). CONCLUSION Light microscopy indicates that Ankaferd and AGS create less inflammation and increased caspase expression, which seems to induce inflammatory cell apoptosis. Ankaferd seems to be a promising hemostatic agent in otology.
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Affiliation(s)
- Erdem Eren
- İzmir Katip Çelebi University Atatürk Research and Education Hospital, Otolaryngology Head and Neck Surgery Clinic, İzmir, Turkey.
| | - Mehmet Sinan Başoğlu
- İzmir Aliağa State Hospital, Otolaryngology Head and Neck Surgery Clinic, İzmir, Turkey
| | - Erkan Kulduk
- Mardin State Hospital, Otolaryngology Head and Neck Surgery Clinic, Mardin, Turkey
| | - Fatma Şimsek
- İzmir Katip Çelebi University, Faculty of Medicine, Department of Histology and Embrology, İzmir, Turkey
| | - Sevinç İnan
- Celal Bayar University, Faculty of Medicine, Department of Histology and Embrology, Manisa, Turkey
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Baker TG, Roy S, Brandon CS, Kramarenko IK, Francis SP, Taleb M, Marshall KM, Schwendener R, Lee FS, Cunningham LL. Heat shock protein-mediated protection against Cisplatin-induced hair cell death. J Assoc Res Otolaryngol 2014; 16:67-80. [PMID: 25261194 DOI: 10.1007/s10162-014-0491-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 09/16/2014] [Indexed: 12/20/2022] Open
Abstract
Cisplatin is a highly successful and widely used chemotherapy for the treatment of various solid malignancies in both adult and pediatric patients. Side effects of cisplatin treatment include nephrotoxicity and ototoxicity. Cisplatin ototoxicity results from damage to and death of cells in the inner ear, including sensory hair cells. We showed previously that heat shock inhibits cisplatin-induced hair cell death in whole-organ cultures of utricles from adult mice. Since heat shock protein 70 (HSP70) is the most upregulated HSP in response to heat shock, we investigated the role of HSP70 as a potential protectant against cisplatin-induced hair cell death. Our data using utricles from HSP70 (-/-) mice indicate that HSP70 is necessary for the protective effect of heat shock against cisplatin-induced hair cell death. In addition, constitutive expression of inducible HSP70 offered modest protection against cisplatin-induced hair cell death. We also examined a second heat-inducible protein, heme oxygenase-1 (HO-1, also called HSP32). HO-1 is an enzyme responsible for the catabolism of free heme. We previously showed that induction of HO-1 using cobalt protoporphyrin IX (CoPPIX) inhibits aminoglycoside-induced hair cell death. Here, we show that HO-1 also offers significant protection against cisplatin-induced hair cell death. HO-1 induction occurred primarily in resident macrophages, with no detectable expression in hair cells or supporting cells. Depletion of macrophages from utricles abolished the protective effect of HO-1 induction. Together, our data indicate that HSP induction protects against cisplatin-induced hair cell death, and they suggest that resident macrophages mediate the protective effect of HO-1 induction.
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Affiliation(s)
- Tiffany G Baker
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, 165 Ashley Ave, Charleston, SC, 29425, USA
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