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Zheng Y, Gao N, Zhang W, Ma R, Chi F, Gao Z, Cong N. Melatonin Alleviates the Oxygen-Glucose Deprivation/Reperfusion-Induced Pyroptosis of HEI-OC1 Cells and Cochlear Hair Cells via MT-1,2/Nrf2 (NFE2L2)/ROS/NLRP3 Pathway. Mol Neurobiol 2023; 60:629-642. [PMID: 36334193 DOI: 10.1007/s12035-022-03077-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 10/05/2022] [Indexed: 11/06/2022]
Abstract
Substantial evidence suggests that pyroptosis is involved in renal, cerebral, and myocardial ischemia-reperfusion injury. However, whether pyroptosis is involved in ischemia-reperfusion injury of cochlear hair cells has not been explored. In this study, we examined the effects of melatonin on the oxygen-glucose deprivation/reperfusion (OGD/R) of hair cell-like House Ear Institute-Organ of Corti 1 (HEI-OC1) cells and cochlear hair cells in vitro to mimic cochlear ischemia-reperfusion injury in vivo. We found that melatonin treatment protected the HEI-OC1 and cochlear hair cells against OGD/R-induced cell pyroptosis and reduced the expression level of ROS in these cells. However, these effects were completely abolished by the application of luzindole (a non-selective melatonin receptor blocker) and largely offset by the use of ML385 (an nuclear factor erythroid 2-related factor 2 (Nrf2) inhibitor). These findings suggest that melatonin alleviates OGD/R-induced pyroptosis of the hair cell-like HEI-OC1 cells and cochlear hair cells via the melatonin receptor 1A (MT-1) and melatonin receptor 1B (MT-2)/Nrf2 (NFE2L2)/ROS/NLRP3 pathway, which may provide credible evidence for melatonin being used as a potential drug for the treatment of idiopathic sudden sensorineural hearing loss in the future.
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Affiliation(s)
- Yu Zheng
- Department of Otorhinolaryngology, Eye Ear Nose and Throat Hospital, Fudan University, Shanghai, 200031, China
- Shanghai Clinical Medical Center of Hearing Medicine, Shanghai, 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, 20031, People's Republic of China
- Research Institute of Otorhinolaryngology, Fudan University, Shanghai, 200031, China
| | - Na Gao
- Department of Otorhinolaryngology, Eye Ear Nose and Throat Hospital, Fudan University, Shanghai, 200031, China
- Shanghai Clinical Medical Center of Hearing Medicine, Shanghai, 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, 20031, People's Republic of China
- Research Institute of Otorhinolaryngology, Fudan University, Shanghai, 200031, China
| | - Weixun Zhang
- Department of Otorhinolaryngology, Eye Ear Nose and Throat Hospital, Fudan University, Shanghai, 200031, China
- Shanghai Clinical Medical Center of Hearing Medicine, Shanghai, 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, 20031, People's Republic of China
- Research Institute of Otorhinolaryngology, Fudan University, Shanghai, 200031, China
| | - Rui Ma
- Department of Otorhinolaryngology, Eye Ear Nose and Throat Hospital, Fudan University, Shanghai, 200031, China
- Shanghai Clinical Medical Center of Hearing Medicine, Shanghai, 200031, China
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, 20031, People's Republic of China
- Research Institute of Otorhinolaryngology, Fudan University, Shanghai, 200031, China
| | - Fanglu Chi
- Department of Otorhinolaryngology, Eye Ear Nose and Throat Hospital, Fudan University, Shanghai, 200031, China.
- Shanghai Clinical Medical Center of Hearing Medicine, Shanghai, 200031, China.
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, 20031, People's Republic of China.
- Research Institute of Otorhinolaryngology, Fudan University, Shanghai, 200031, China.
| | - Zhen Gao
- Department of Otorhinolaryngology, Eye Ear Nose and Throat Hospital, Fudan University, Shanghai, 200031, China.
- Shanghai Clinical Medical Center of Hearing Medicine, Shanghai, 200031, China.
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, 20031, People's Republic of China.
- Research Institute of Otorhinolaryngology, Fudan University, Shanghai, 200031, China.
| | - Ning Cong
- Department of Otorhinolaryngology, Eye Ear Nose and Throat Hospital, Fudan University, Shanghai, 200031, China.
- Shanghai Clinical Medical Center of Hearing Medicine, Shanghai, 200031, China.
- NHC Key Laboratory of Hearing Medicine, Fudan University, Shanghai, 20031, People's Republic of China.
- Research Institute of Otorhinolaryngology, Fudan University, Shanghai, 200031, China.
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Guo JY, He L, Chen ZR, Liu K, Gong SS, Wang GP. AAV8-mediated Atoh1 overexpression induces dose-dependent regeneration of vestibular hair cells in adult mice. Neurosci Lett 2021; 747:135679. [PMID: 33524475 DOI: 10.1016/j.neulet.2021.135679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/31/2020] [Accepted: 01/22/2021] [Indexed: 10/22/2022]
Abstract
Vestibular hair cells (HCs) are mechanoreceptors for the detection of head movement. Vestibular HCs of adult mammals never completely regenerate after damage, resulting in vestibular dysfunction. Overexpression of Atoh1 is effective for inducing HC regeneration. However, method of clinical feasibility and improvement of regenerative extent are both in need. Here we used an adeno-associated virus (AAV) serotype 8 vector of two different titers to overexpress Atoh1 in the injured utricles of adult mice. One month after virus inoculation, abundant myosin VIIa-positive cells and immature stereocilia were observed. Quantitative analyses revealed that Atoh1 overexpression replenished vestibular HCs in a dose-dependent manner. Vectors of a higher titer increased the number of myosin VIIa-positive cells compared to those of lower titer. Moreover, only Atoh1 overexpression in the higher titer group enhanced stereocilium regeneration, which is an important step in the maturation of regenerated HCs. Although the current treatment failed to initiate functional recovery of the animals, our results prompt further improvements in the recovery of vestibular dysfunction by AAV.
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Affiliation(s)
- Jing-Ying Guo
- Department of Otolaryngology-Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Lu He
- Department of Otolaryngology-Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Zhong-Rui Chen
- Department of Otolaryngology-Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Ke Liu
- Department of Otolaryngology-Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Shu-Sheng Gong
- Department of Otolaryngology-Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Guo-Peng Wang
- Department of Otolaryngology-Head and Neck Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China.
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Developmental and Functional Hair Cell-Like Cells Induced by Atoh1 Overexpression in the Adult Mammalian Cochlea In Vitro. Neural Plast 2020; 2020:8885813. [PMID: 33204251 PMCID: PMC7661126 DOI: 10.1155/2020/8885813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 09/17/2020] [Accepted: 10/21/2020] [Indexed: 12/22/2022] Open
Abstract
Hair cells (HCs) in the mammalian cochleae cannot spontaneously regenerate once damaged, resulting in permanent hearing loss. It has been shown that Atoh1 overexpression induces hair cell-like cells (HCLCs) in the cochlea of newborn rodents, but this is hard to achieve in adult mammals. In this study, we used a three-dimensional cochlear culture system and an adenoviral-mediated delivery vector to overexpress Atoh1 in adult mouse cochleae. HCLCs were successfully induced from 3 days after virus infection (3 DVI) in vitro, and the number increased with time. HCLCs were myosin7a positive and distinguishable from remnant HCs in a culture environment. Meanwhile, patch-clamp results showed that noninactive outward potassium currents (sustained outward potassium currents) could be recorded in HCLCs and that their magnitude increased with time, similar to normal HCs. Furthermore, transient HCN currents were recorded in some HCLCs, indicating that the HCLCs experienced a developmental stage similar to normal HCs. We also compared the electrophysiological features of HCLCs from adult mice with native HCs and found the HCLCs gradually matured, similar to the normal HCs. Meanwhile, HCLCs from adult mice possessed the same bundles as developmental HCs. However, these HCLCs did not express prestin, which is a special marker for outer hair cells (OHCs), even at 13 DVI. These results demonstrate that Atoh1 overexpression induces HCLC formation in the adult mammalian cochlea and that these HCLCs were functional and experienced a developmental process similar to that of normal HCs.
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