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Wan H, Chen H, Liu J, Yang B, Zhang Y, Bai Y, Chen X, Wang J, Liu T, Zhang Y, Hua Q. PARP1 inhibition prevents oxidative stress in age-related hearing loss via PAR-Ca 2+-AIF axis in cochlear strial marginal cells. Free Radic Biol Med 2024; 220:222-235. [PMID: 38735540 DOI: 10.1016/j.freeradbiomed.2024.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 05/02/2024] [Accepted: 05/09/2024] [Indexed: 05/14/2024]
Abstract
Studies have highlighted oxidative damage in the inner ear as a critical pathological basis for sensorineural hearing loss, especially the presbycusis. Poly(ADP-ribose) polymerase-1 (PARP1) activation responds to oxidative stress-induced DNA damage with pro-repair and pro-death effects resembling two sides of the same coin. PARP1-related cell death, known as parthanatos, whose underlying mechanisms are attractive research hotspots but remain to be clarified. In this study, we observed that aged rats showed stria vascularis degeneration and oxidative damage, and PARP1-dependent cell death was prominent in age-related cochlear disorganization and dysfunction. Based on oxidative stress model of primary cultured stria marginal cells (MCs), we revealed that upregulated PARP1 and PAR (Poly(ADP-ribose)) polymers are responsible for MCs oxidative death with high mitochondrial permeability transition pore (mPTP) opening and mitochondrial membrane potential (MMP) collapse, while inhibition of PARP1 ameliorated the adverse outcomes. Importantly, the PARylation of apoptosis-inducing factor (AIF) is essential for its conformational change and translocation, which subsequently causes DNA break and cell death. Concretely, the interaction of PAR and truncated AIF (tAIF) is the mainstream in the parthanatos pathway. We also found that the effects of AIF cleavage and release were achieved through calpain activity and mPTP opening, both of which could be regulated by PARP1 via mediation of mitochondria Ca2+ concentration. In conclusion, the PAR-Ca2+-tAIF signaling pathway in parthanatos contributes to the oxidative stress damage observed in MCs. Targeting PAR-Ca2+-tAIF might be a potential therapeutic strategy for the early intervention of presbycusis and other oxidative stress-associated sensorineural deafness.
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Affiliation(s)
- Huanzhi Wan
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan, 430060, Hubei Province, China; The First Clinical School of Wuhan University, Wuhan, 430060, Hubei Province, China
| | - Huidong Chen
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan, 430060, Hubei Province, China; The First Clinical School of Wuhan University, Wuhan, 430060, Hubei Province, China
| | - Jingchun Liu
- The First Clinical School of Wuhan University, Wuhan, 430060, Hubei Province, China
| | - Bingqian Yang
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan, 430060, Hubei Province, China; The First Clinical School of Wuhan University, Wuhan, 430060, Hubei Province, China
| | - Yunlong Zhang
- Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan, 430060, Hubei Province, China; The First Clinical School of Wuhan University, Wuhan, 430060, Hubei Province, China
| | - Yutong Bai
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan, 430060, Hubei Province, China; The First Clinical School of Wuhan University, Wuhan, 430060, Hubei Province, China
| | - Xiaoying Chen
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan, 430060, Hubei Province, China; The First Clinical School of Wuhan University, Wuhan, 430060, Hubei Province, China
| | - Jie Wang
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan, 430060, Hubei Province, China; The First Clinical School of Wuhan University, Wuhan, 430060, Hubei Province, China
| | - Tianyi Liu
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan, 430060, Hubei Province, China.
| | - Yuanyuan Zhang
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan, 430060, Hubei Province, China.
| | - Qingquan Hua
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan, 430060, Hubei Province, China.
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Dong L, Wang S, Wang X, Wang Z, Liu D, You H. Investigating the adverse outcome pathways (AOP) of neurotoxicity induced by DBDPE with a combination of in vitro and in silico approaches. JOURNAL OF HAZARDOUS MATERIALS 2023; 449:131021. [PMID: 36821895 DOI: 10.1016/j.jhazmat.2023.131021] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 02/14/2023] [Accepted: 02/15/2023] [Indexed: 06/18/2023]
Abstract
Current studies have shown an association between DBDPE and neurotoxicity. In this study, the adverse outcome pathway (AOP) and mechanistic analysis of DBDPE-induced neurotoxicity were explored by a combination of in vitro and in silico approaches in SK-N-SH cells. DBDPE-induced oxidative stress caused DNA strand breaks, resulting in the activation of poly (ADP-ribose) (PAR) polymerase-1 (PARP-1). Activation of PARP1 could cause toxic damage in various organ systems, especially in the nervous system. DBDPE-induced apoptosis via the caspase-dependent intrinsic mitochondrial pathway and the PARP1-dependent pathway. Activation of PARP1 by DBDPE was deemed the initiating event, thereby affecting the key downstream biochemical events (e.g., ROS production, DNA damage, membrane potential changes, and ATP reduction), which induced apoptosis. Furthermore, excessive activation of PARP1 was accompanied by the translocation of the apoptosis-inducing factor (AIF), which was associated with PARP1-dependent cell death. The inhibition of PARP1 by PJ34 reduced DBDPE-induced apoptosis and maintained cellular ATP levels. PJ34 also prevented the translocation of AIF from the mitochondria to the nucleus. These findings improve the understanding of the mechanism of DBDPE-induced neurotoxic effects and provide a theoretical basis for the ecological risk of DBDPE.
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Affiliation(s)
- Liying Dong
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Shutao Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Xingyu Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Ziwei Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Dongmei Liu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Hong You
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
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Krishnan Muthaiah VP, Kaliyappan K, Mahajan SD. Poly ADP-Ribose Polymerase-1 inhibition by 3-aminobenzamide recuperates HEI-OC1 auditory hair cells from blast overpressure-induced cell death. Front Cell Dev Biol 2023; 11:1047308. [PMID: 36949771 PMCID: PMC10025353 DOI: 10.3389/fcell.2023.1047308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 01/30/2023] [Indexed: 03/08/2023] Open
Abstract
Introduction: Poly ADP-Ribose Polymerase-1 (PARP1), a DNA repair enzyme is implicated as a key molecule in the pathogenesis of several neurodegenerative disorders. Traumatic insults inducing oxidative stress results in its over-activation causing inflammation and cell death (Parthanatos). As PARP1 inhibition is known to reduce oxidative stress, we hypothesized that PARP1 inhibition by a known inhibitor 3-aminobenzamide (3AB) might recuperate the damage in an in vitro model of blast injury using HEI-OC1 cells (mouse auditory hair cells). Methods: Here, we evaluated the protective effect of 3AB on HEI-OC1 cells following single and repetitive blast overpressures (BOPs). Results: We found that inhibition of PARP1 b 3AB inhibits the PARP1 enzyme and its action of a post-translational modification i.e. formation of Poly ADP-Ribose Polymers which leads to massive ATP depletion. PARP inhibition (3AB treatment) reduced the oxidative stress (4HNE, a marker of lipid peroxidation, and 8OHdG, a marker of oxidative DNA damage) in cells exposed to single/repetitive BOPS through up-regulation of Nrf2, a transcriptional regulator of antioxidant defense and the GCLC, a rate limiting enzyme in the synthesis of glutathione. Discussion: Overall, we found that PARP inhibition by 3AB helps to maintain the viability of BOP-exposed auditory hair cells by recuperating the ATP pool from both mitochondrial and glycolytic sources.
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Affiliation(s)
- Vijaya Prakash Krishnan Muthaiah
- Department of Rehabilitation Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, United States
- *Correspondence: Vijaya Prakash Krishnan Muthaiah,
| | - Kathiravan Kaliyappan
- Department of Rehabilitation Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, United States
| | - Supriya D. Mahajan
- Department of Medicine, Division of Allergy, Immunology and Rheumatology, State University of New York at Buffalo, Clinical Translational Research Center, Buffalo, NY, United States
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Pravastatin Administration Alleviates Kanamycin-Induced Cochlear Injury and Hearing Loss. Int J Mol Sci 2022; 23:ijms23094524. [PMID: 35562915 PMCID: PMC9105065 DOI: 10.3390/ijms23094524] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/13/2022] [Accepted: 04/18/2022] [Indexed: 11/23/2022] Open
Abstract
The effect of statins on aminoglycoside-induced ototoxicity is controversial. This study aimed to explore the role of pravastatin (PV) in kanamycin-induced hearing loss in rats. Adult rats were intraperitoneally treated with 20 mg/kg/day of kanamycin (KM) for 10 days. In the PV- and PV + KM-treated rats, 25 mg/kg/day of PV was intraperitoneally administered for 5 days. The auditory brainstem response (ABR) thresholds were measured before and after drug treatment using a smartEP system at 4, 8, 16, and 32 kHz. Cochlear changes in poly ADP-ribose (PAR) polymerase (PARP), PAR, and caspase 3 were estimated using Western blotting. PV administration did not increase the ABR thresholds. The KM-treated rats showed elevated ABR thresholds at 4, 8, 16, and 32 kHz. The PV + KM-treated rats demonstrated lower ABR thresholds than the KM-treated rats at 4, 8, and 16 kHz. The cochlear outer hair cells and spiral ganglion cells were relatively preserved in the PV + KM-treated rats when compared with that in the KM-treated rats. The cochlear expression levels of PARP, PAR, and caspase 3 were higher in the KM-treated rats. The PV + KM-treated rats showed lower levels of PARP, PAR, and caspase 3 than the KM-treated rats. PV protected cochleae from KM-induced hearing loss in rats. The regulation of autophagy and apoptosis mediated the otoprotective effects of PV.
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Man R, Yin H, Zhao J, Yang Q, Yang H, Yu X, Zhang W, Li J. A Newly-Synthesized Chalcone Derivative of Ligustrazine Induces Caspase-Dependent and Apoptosis-Inducing Factor-Dependent Apoptosis in Cochlear Hair Cells. J BIOMATER TISS ENG 2021. [DOI: 10.1166/jbt.2021.2544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Objective: A newly synthesized derivative of ligustrazine chalcone, named as Z11, has shown a variety of promising biological activities. Here we aim to explore the effects of Z11 on the cochlear hair cells (HCs). Methods: Immunostaining and transmission electron microscopy
(TEM) were used to examine the survival of HCs and their morphological changes. Furthermore, apoptosis was detected by terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay and the mRNA expression of apoptosis related genes including Caspase-9, Caspase-3, Bcl-2, Bax and
Apaf1 were measured by RT-PCR. In addition, the protein expression of cleaved-Caspas-3 and cleaved-Caspase-9 were analyzed by Western blot respectively, and the protein expressionof AIF and cleaved-Caspase-3 were assessed by immunofluorescence as well. Results: Immunostaining showed
that Z11 was ototoxic to mouse cochlear hair cells and significantly triggered cell death in a concentration-, time- and location-dependent manner. TUNEL assays evidenced that Z11 exerts its cytotoxicity through induction of apoptosis of cochlear hair cells in vitro. Immunofluorescence
and western blot assay showed that Z11 activated the translation of apoptosis-inducing factor (AIF) and Caspase-9/Caspase-3 dependent apoptotic pathway in cochlear hair cells (HCs). Conclusion:These findings suggest that Z11 exhibits its ototoxicity through inducing apoptosis of HCs
via both Caspase-dependent and AIF translocation pathways in mouse cochlear cultures.
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Affiliation(s)
- Rongjun Man
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, PR. China
| | - Haiyan Yin
- Department of Histology and Embryology, College of Basic Medicine, Jining Medical University, Jining, Shandong, 272067, PR. China
| | - Jia Zhao
- Department of Otolaryngology-Head and Neck Surgery, Zibo Central Hospital, Zibo, Shandong, 255036, P.R. China
| | - Qianqian Yang
- Department of Pathology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215006, P.R. China
| | - Huiming Yang
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, PR. China
| | - Xiaoyu Yu
- Department of Otolaryngology-Head and Neck Surgery, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, P. R. China
| | - Weiwei Zhang
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, PR. China
| | - Jianfeng Li
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, PR. China
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Raj S, Dsouza LA, Singh SP, Kanwal A. Sirt6 Deacetylase: A Potential Key Regulator in the Prevention of Obesity, Diabetes and Neurodegenerative Disease. Front Pharmacol 2020; 11:598326. [PMID: 33442387 PMCID: PMC7797778 DOI: 10.3389/fphar.2020.598326] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 10/27/2020] [Indexed: 12/31/2022] Open
Abstract
Sirtuins, NAD + dependent proteins belonging to class III histone deacetylases, are involved in regulating numerous cellular processes including cellular stress, insulin resistance, inflammation, mitochondrial biogenesis, chromatin silencing, cell cycle regulation, transcription, and apoptosis. Of the seven mammalian sirtuins present in humans, Sirt6 is an essential nuclear sirtuin. Until recently, Sirt6 was thought to regulate chromatin silencing, but new research indicates its role in aging, diabetes, cardiovascular disease, lipid metabolism, neurodegenerative diseases, and cancer. Various murine models demonstrate that Sirt6 activation is beneficial in alleviating many disease conditions and increasing lifespan, showing that Sirt6 is a critical therapeutic target in the treatment of various disease conditions in humans. Sirt6 also regulates the pathogenesis of multiple diseases by acting on histone proteins and non-histone proteins. Endogenous and non-endogenous modulators regulate both activation and inhibition of Sirt6. Few Sirt6 specific non-endogenous modulators have been identified. Hence the identification of Sirt6 specific modulators may have potential therapeutic roles in the diseases described above. In this review, we describe the development of Sirt6, the role it plays in the human condition, the functional role and therapeutic importance in disease processes, and specific modulators and molecular mechanism of Sirt6 in the regulation of metabolic homeostasis, cardiovascular disease, aging, and neurodegenerative disease.
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Affiliation(s)
- Swapnil Raj
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Liston Augustine Dsouza
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Shailendra Pratap Singh
- Department of Biomedical Engineering, School of Engineering and Technology, Central University of Rajasthan, Kishangarh, India
| | - Abhinav Kanwal
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education, Manipal, India
- Department of Pharmacology, All India Institute of Medical Sciences (AIIMS), Bathinda, India
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Liu C, Zhao X, Mu C, Li H, Ma J, Jiao H, Huo Z. The Association of Partial Azoospermia Factor C Deletions and Male Infertility in Northwestern China. Hum Hered 2019; 84:144-150. [PMID: 31805572 DOI: 10.1159/000504607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 10/29/2019] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Male infertility is a major health issue worldwide. Y chromosome microdeletions are well-characterized genetic causes of male infertility. The association of partial AZFc deletions (gr/gr, b2/b3, and b1/b3) with male infertility is not well confirmed in diverse populations. The purpose of the present study was to investigate the frequency of partial AZFc deletions and their association with male infertility in a population from Northwestern China. METHODS Multiplex polymerase chain reaction was used to detect partial AZFc deletions in 228 infertile patients. We analyzed 141 cases of azoospermia (AS), 87 cases of oligozoospermia (OS), and 200 fertile controls. RESULTS Our data showed that the frequency of a b2/b3 deletion in infertile men, men with AS, men with OS, and controls was 3.51, 2.13, 5.75, and 0.00%, respectively. The frequency of this deletion was significantly different between the infertile group and the control group (3.51 vs. 0.00%, respectively, p = 0.021) and between the OS group and the control group (5.75 vs. 0.00%, respectively, p = 0.003). The frequency of a gr/gr deletion in each group was 11.84, 9.22, 16.09, and 7.50%, respectively. The frequency of a gr/gr deletion was significantly different between the OS group and the control group (16.09 vs. 7.50%, respectively, p = 0.026) but not between the infertile group and the control group (11.84 vs. 7.50%, p = 0.132) or the AS group and the control group (9.22 vs. 7.50%, p = 0.569). The frequency of a b1/b3 deletion was 0.44, 0.71, 0.00, and 3.00%, respectively. For this deletion, there was no significant difference between the infertile (0.44 vs. 3.00%, p = 0.089), AS (0.71 vs. 3.00%, p = 0.276), and OS groups (0.00 vs. 3.00%, p = 0.236) and the control group. CONCLUSIONS Our results suggest that the b2/b3 deletion might be associated with male infertility and that the gr/gr deletion might be associated with spermatogenic failure in men with OS in Northwestern China (Ningxia).
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Affiliation(s)
- Chunlian Liu
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Ningxia Medical University, Yinchuan, China.,Key Laboratory of Reproduction and Genetics in Ningxia, Yinchuan, China.,Department of Medical Genetic and Cell Biology, Basic Medicine Science College, Ningxia Medical University, Yinchuan, China.,Center for Reproductive Medicine, General Hospital, Ningxia Medical University, Yinchuan, China
| | - Xinyan Zhao
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Ningxia Medical University, Yinchuan, China.,Key Laboratory of Reproduction and Genetics in Ningxia, Yinchuan, China.,Department of Medical Genetic and Cell Biology, Basic Medicine Science College, Ningxia Medical University, Yinchuan, China
| | - Chunlan Mu
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Ningxia Medical University, Yinchuan, China.,Key Laboratory of Reproduction and Genetics in Ningxia, Yinchuan, China.,Department of Medical Genetic and Cell Biology, Basic Medicine Science College, Ningxia Medical University, Yinchuan, China
| | - Hui Li
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Ningxia Medical University, Yinchuan, China.,Key Laboratory of Reproduction and Genetics in Ningxia, Yinchuan, China.,Department of Medical Genetic and Cell Biology, Basic Medicine Science College, Ningxia Medical University, Yinchuan, China
| | - Jia Ma
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Ningxia Medical University, Yinchuan, China.,Key Laboratory of Reproduction and Genetics in Ningxia, Yinchuan, China.,Department of Medical Genetic and Cell Biology, Basic Medicine Science College, Ningxia Medical University, Yinchuan, China
| | - Haiyan Jiao
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Ningxia Medical University, Yinchuan, China, .,Key Laboratory of Reproduction and Genetics in Ningxia, Yinchuan, China, .,Department of Medical Genetic and Cell Biology, Basic Medicine Science College, Ningxia Medical University, Yinchuan, China,
| | - Zhenghao Huo
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Ningxia Medical University, Yinchuan, China.,Key Laboratory of Reproduction and Genetics in Ningxia, Yinchuan, China.,Department of Medical Genetic and Cell Biology, Basic Medicine Science College, Ningxia Medical University, Yinchuan, China
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8
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Desa DE, Nichols MG, Smith HJ. Aminoglycosides rapidly inhibit NAD(P)H metabolism increasing reactive oxygen species and cochlear cell demise. JOURNAL OF BIOMEDICAL OPTICS 2018; 24:1-14. [PMID: 30411553 PMCID: PMC6225535 DOI: 10.1117/1.jbo.24.5.051403] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 09/21/2018] [Indexed: 06/04/2023]
Abstract
Despite causing permanent hearing loss by damaging inner ear sensory cells, aminoglycosides (AGs) remain one of the most widely used classes of antibiotics in the world. Although the mechanisms of cochlear sensory cell damage are not fully known, reactive oxygen species (ROS) are clearly implicated. Mitochondrial-specific ROS formation was evaluated in acutely cultured murine cochlear explants exposed to gentamicin (GM), a representative ototoxic AG antibiotic. Superoxide (O2·-) and hydrogen peroxide (H2O2) were measured using MitoSOX Red and Dihydrorhodamine 123, respectively, in sensory and supporting cells. A 1-h GM exposure significantly increased O2·- formation in IHCs and increased H2O2 formation in all cell types. At the same time point, GM significantly increased manganese superoxide dismutase (MnSOD) levels while significantly decreasing copper/zinc superoxide dismutase (CuZnSOD) in cochlear sensory cells. This suggests (1) a rapid conversion of highly reactive O2·- to H2O2 during the acute stage of ototoxic antibiotic exposure and (2) that the endogenous antioxidant system is significantly altered by AGs. Fluorescence intensity-based measurements of reduced nicotinamide adenine dinucleotide (phosphate) [NAD(P)H] and mitochondrial membrane potential were measured to determine if increases in GM-induced ROS production were correlated with changes in mitochondrial metabolism. This project provides a basis for understanding the mechanisms of mitochondrial ROS production in cochlear cells exposed to ototoxic antibiotics. Understanding the nature of ototoxic antibiotic-induced changes in mitochondrial metabolism is critical for developing hearing loss treatment and prevention strategies.
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Affiliation(s)
- Danielle E. Desa
- University of Rochester, Department of Biomedical Engineering, Rochester, New York, United States
| | - Michael G. Nichols
- Creighton University, Department of Physics, Omaha, Nebraska, United States
- Creighton University, Department of Biomedical Sciences, Omaha, Nebraska, United States
| | - Heather Jensen Smith
- University of Nebraska Medical Center, The Eppley Institute for Cancer and Allied Diseases, Omaha, Nebraska, United States
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9
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Cao Z, Yang Q, Yin H, Qi Q, Li H, Sun G, Wang H, Liu W, Li J. Peroxynitrite induces apoptosis of mouse cochlear hair cells via a Caspase-independent pathway in vitro. Apoptosis 2017; 22:1419-1430. [PMID: 28900799 DOI: 10.1007/s10495-017-1417-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Peroxynitrite (ONOO-) is a potent and versatile oxidant implicated in a number of pathophysiological processes. The present study was designed to investigate the effect of ONOO- on the cultured cochlear hair cells (HCs) of C57BL/6 mice in vitro as well as the possible mechanism underlying the action of such an oxidative stress. The in vitro primary cultured cochlear HCs were subjected to different concentrations of ONOO-, then, the cell survival and morphological changes were examined by immunofluorescence and transmission electron microscopy (TEM), the apoptosis was determined by Terminal deoxynucleotidyl transferase dUNT nick end labeling (TUNEL) assay, the mRNA expressions of Caspase-3, Caspase-8, Caspase-9, Apaf1, Bcl-2, and Bax were analyzed by RT-PCR, and the protein expressions of Caspase-3 and AIF were assessed by immunofluorescence. This work demonstrated that direct exposure of primary cultured cochlear HCs to ONOO- could result in a base-to-apex gradient injury of HCs in a concentration-dependent manner. Furthermore, ONOO- led to much more losses of outer hair cells than inner hair cells mainly through the induction of apoptosis of HCs as evidenced by TEM and TUNEL assays. The mRNA expressions of Caspase-8, Caspase-9, Apaf1, and Bax were increased and, meanwhile, the mRNA expression of Bcl-2 was decreased in response to ONOO- treatment. Of interesting, the expression of Caspase-3 had no significant change, whereas, the expression alteration of AIF was observed. These results suggested that ONOO- can effectively damage the survival of cochlear HCs via triggering the apoptotic pathway. The findings from this work suggest that ONOO--induced apoptosis is mediated, at least in part, via a Caspase-independent pathway in cochlear HCs.
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Affiliation(s)
- Zhixin Cao
- Department of Pathology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, People's Republic of China
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, People's Republic of China
| | - Qianqian Yang
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, People's Republic of China
- Shandong Provincial Key Laboratory of Otology, Jinan, 250021, People's Republic of China
| | - Haiyan Yin
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, People's Republic of China
- Shandong Provincial Key Laboratory of Otology, Jinan, 250021, People's Republic of China
| | - Qi Qi
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, People's Republic of China
- Shandong Provincial Key Laboratory of Otology, Jinan, 250021, People's Republic of China
| | - Hongrui Li
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, People's Republic of China
- Shandong Provincial Key Laboratory of Otology, Jinan, 250021, People's Republic of China
| | - Gaoying Sun
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, People's Republic of China
- Shandong Provincial Key Laboratory of Otology, Jinan, 250021, People's Republic of China
| | - Hongliang Wang
- Laboratory of Physical and Chemical Analysis, Shandong Academy of Occupational Health and Occupational Medicine, Shandong Academy of Medical Sciences, Jinan, 250062, People's Republic of China
| | - Wenwen Liu
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, People's Republic of China.
- Shandong Provincial Key Laboratory of Otology, Jinan, 250021, People's Republic of China.
| | - Jianfeng Li
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, People's Republic of China.
- Shandong Provincial Key Laboratory of Otology, Jinan, 250021, People's Republic of China.
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Lee JE, Kwon YJ, Baek HS, Ye DJ, Cho E, Choi HK, Oh KS, Chun YJ. Synergistic induction of apoptosis by combination treatment with mesupron and auranofin in human breast cancer cells. Arch Pharm Res 2017; 40:746-759. [DOI: 10.1007/s12272-017-0923-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Accepted: 05/26/2017] [Indexed: 12/14/2022]
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11
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Feng T, Chen W, Zhang C, Xiang J, Ding H, Wu L, Geng D. The p38/CYLD Pathway is Involved in Necroptosis Induced by Oxygen-glucose Deprivation Combined with ZVAD in Primary Cortical Neurons. Neurochem Res 2017; 42:2294-2304. [PMID: 28374134 DOI: 10.1007/s11064-017-2244-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 02/05/2017] [Accepted: 03/22/2017] [Indexed: 01/01/2023]
Abstract
Recently, necroptosis, a form of programmed necrosis, has been widely studied. It has previously been shown that knockout of lysine 63 deubiquitinase CYLD significantly inhibits necroptosis in other cell lines, and serum response factor (SRF) could regulate CYLD gene expression through p38 mitogen-activated protein kinase (p38 MAPK). In the following study, we show oxygen-glucose deprivation (OGD) combined with a caspase inhibitor, ZVAD (OGD/ZVAD), induced CYLD protein expression in a time-dependent manner. Immunofluorescence studies showed that CYLD was localized strongly to the nucleus and weakly to the cytoplasm of neurons. The expression of CYLD in the cytoplasm, but not in the nucleus, was increased significantly upon OGD treatment. SB203580 (a p38 MAPK inhibitor) protected against neuronal injury induced by OGD/ZVAD treatment. More importantly, SB203580 decreased CYLD protein levels by inhibiting SRF phosphorylation and indirectly prevented SRF from binding to a CYLD promoter. We also found that cells with knockdown of SRF by short interfering RNA in a lentivirus vector tolerated OGD/ZVAD-induced necroptosis, when the expression of CYLD protein decreased. The results show that SB203580 prevented necroptosis induced by OGD/ZVAD injury by blocking a p38/CYLD dependent pathway.
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Affiliation(s)
- Tao Feng
- Department of Rehabilitation Medicine, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - WeiWei Chen
- Department of Neurology, The Fourth Hospital of Xuzhou, Xuzhou, Jiangsu, China
| | - CaiYi Zhang
- Department of Psychiatry, The Eastern Hospital of Xuzhou, Xuzhou, Jiangsu, China
| | - Jie Xiang
- Department of Rehabilitation Medicine, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - HongMei Ding
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, 221002, Xuzhou, Jiangsu, China
| | - LianLian Wu
- Department of Neurobiology, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - DeQin Geng
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, 221002, Xuzhou, Jiangsu, China.
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