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Chen Y, Lin Y, Zhang Y, Liu X, Jiang M. Atoh1 overexpression promotes Guinea pig bone marrow mesenchymal stem cells to differentiate into neural stem cell. Heliyon 2024; 10:e32952. [PMID: 38994119 PMCID: PMC11237998 DOI: 10.1016/j.heliyon.2024.e32952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 06/06/2024] [Accepted: 06/12/2024] [Indexed: 07/13/2024] Open
Abstract
Sensorineural hearing loss (SNHL) is a prevalent condition in otolaryngology. A key obstacle is finding effective strategies for regenerating damaged cochlear hair cells in adult animals. A practical and reliable approach has been developed to create a superior cell source for stem cell transplantation in the inner ear to treat SNHL. Atoh1 is involved in the differentiation of neurons, intestinal secretory cells, and mechanoreceptors including auditory hair cells, and thus plays an important role in neurogenesis. Lentivirus-mediated transfection of bone marrow mesenchymal stem cells (BMSCs) was utilized to achieve stable expression of the essential transcription factor Atoh1, which is crucial for developing auditory hair cells without compromising cell survival. By manipulating the induction conditions through altering the cell growth environment using anti-adherent culture, the synergistic impact of basic fibroblast growth factor (bFGF) and epidermal growth factor (EGF) was effectively applied to significantly improve the differentiation efficiency of bone marrow-derived mesenchymal stem cells (BMSC) into neural stem cells (NSCs) following Atoh1 transfection, thereby reducing the induction time. The study indicated that the newly proposed transdifferentiation method effectively transformed BMSCs into NSCs in a controlled environment, presenting a potential approach for stem cell transplantation to promote hair cell regeneration.
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Affiliation(s)
- Yiwen Chen
- Department of Otolaryngology Head and Neck Surgery, Guangzhou Red Cross Hospital (Guangzhou Red Cross Hospital of Jinan University), Guangzhou, Guangdong, 510240, China
| | - Ying Lin
- Department of Otolaryngology Head and Neck Surgery, Guangzhou Red Cross Hospital (Guangzhou Red Cross Hospital of Jinan University), Guangzhou, Guangdong, 510240, China
| | - Yuanhui Zhang
- Department of Otolaryngology Head and Neck Surgery, Guangzhou Red Cross Hospital (Guangzhou Red Cross Hospital of Jinan University), Guangzhou, Guangdong, 510240, China
| | - Xiaoping Liu
- Department of Otolaryngology Head and Neck Surgery, Guangzhou Red Cross Hospital (Guangzhou Red Cross Hospital of Jinan University), Guangzhou, Guangdong, 510240, China
| | - Ming Jiang
- Department of Otolaryngology Head and Neck Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, China
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Mittal R, Bencie N, Liu G, Eshraghi N, Nisenbaum E, Blanton SH, Yan D, Mittal J, Dinh CT, Young JI, Gong F, Liu XZ. Recent advancements in understanding the role of epigenetics in the auditory system. Gene 2020; 761:144996. [PMID: 32738421 PMCID: PMC8168289 DOI: 10.1016/j.gene.2020.144996] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 07/21/2020] [Indexed: 11/19/2022]
Abstract
Sensorineural deafness in mammals is most commonly caused by damage to inner ear sensory epithelia, or hair cells, and can be attributed to genetic and environmental causes. After undergoing trauma, many non-mammalian organisms, including reptiles, birds, and zebrafish, are capable of regenerating damaged hair cells. Mammals, however, are not capable of regenerating damaged inner ear sensory epithelia, so that hair cell damage is permanent and can lead to hearing loss. The field of epigenetics, which is the study of various phenotypic changes caused by modification of genetic expression rather than alteration of DNA sequence, has seen numerous developments in uncovering biological mechanisms of gene expression and creating various medical treatments. However, there is a lack of information on the precise contribution of epigenetic modifications in the auditory system, specifically regarding their correlation with development of inner ear (cochlea) and consequent hearing impairment. Current studies have suggested that epigenetic modifications influence differentiation, development, and protection of auditory hair cells in cochlea, and can lead to hair cell degeneration. The objective of this article is to review the existing literature and discuss the advancements made in understanding epigenetic modifications of inner ear sensory epithelial cells. The analysis of the emerging epigenetic mechanisms related to inner ear sensory epithelial cells development, differentiation, protection, and regeneration will pave the way to develop novel therapeutic strategies for hearing loss.
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Affiliation(s)
- Rahul Mittal
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Nicole Bencie
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - George Liu
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Nicolas Eshraghi
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Eric Nisenbaum
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Susan H Blanton
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA; Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute for Human Genetics, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Denise Yan
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Jeenu Mittal
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Christine T Dinh
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Juan I Young
- Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute for Human Genetics, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Feng Gong
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Xue Zhong Liu
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA; Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute for Human Genetics, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
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Recent advancements in understanding the role of epigenetics in the auditory system. Gene 2020. [DOI: 10.1016/j.gene.2020.144996
expr 848609818 + 898508594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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Chen J, Hong F, Zhang C, Li L, Wang C, Shi H, Fu Y, Wang J. Differentiation and transplantation of human induced pluripotent stem cell-derived otic epithelial progenitors in mouse cochlea. Stem Cell Res Ther 2018; 9:230. [PMID: 30157937 PMCID: PMC6116394 DOI: 10.1186/s13287-018-0967-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 07/12/2018] [Accepted: 08/01/2018] [Indexed: 12/24/2022] Open
Abstract
Background Inner ear hair cells as mechanoreceptors are extremely important for hearing. Defects in hair cells are a major cause of deafness. Induced pluripotent stem cells (iPSCs) are promising for regenerating inner ear hair cells and treating hearing loss. Here, we investigated migration, differentiation, and synaptic connections of transplanted otic epithelial progenitors (OEPs) derived from human iPSCs in mouse cochlea. Methods Human urinary cells isolated from a healthy donor were reprogramed to form iPSCs that were induced to differentiate into OEPs and hair cell-like cells. Immunocytochemistry, electrophysiological examination, and scanning electron microscopy were used to examine characteristics of induced hair cell-like cells. OEP-derived hair cell-like cells were cocultured with spiral ganglion neurons (SGNs), and the markers of synaptic connections were detected using immunocytochemistry and transmission electron microscope. In vivo, OEPs derived from iPSCs were transplanted into the cochlea of mice by injection through the round window. Migration, differentiation, and synaptic connections of transplanted cells were also examined by thin cochlear sectioning and immunohistochemistry. Results The induced hair cell-like cells displayed typical morphological characteristics and electrophysiological properties specific to inner hair cells. In vitro, OEP-derived hair cell-like cells formed synaptic connections with SGNs in coculture. In vivo, some of the transplanted cells migrated to the site of the resident hair cells in the organ of Corti, differentiated into hair cell-like cells, and formed synaptic connections with native SGNs. Conclusions We conclude that the transplantation of OEPs is feasible for the regeneration of hair cells. These results present a substantial reference for a cell-based therapy for the loss of hair cells.
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Affiliation(s)
- Jianling Chen
- Institute of Cell and Development, College of Life Sciences, Zi-Jin-Gang Campus of Zhejiang University, Room 307, No.866, Yuhangtang Road, Hangzhou, 310058, Zhejiang, China
| | - Fanfan Hong
- Institute of Cell and Development, College of Life Sciences, Zi-Jin-Gang Campus of Zhejiang University, Room 307, No.866, Yuhangtang Road, Hangzhou, 310058, Zhejiang, China
| | - Cui Zhang
- Institute of Cell and Development, College of Life Sciences, Zi-Jin-Gang Campus of Zhejiang University, Room 307, No.866, Yuhangtang Road, Hangzhou, 310058, Zhejiang, China
| | - Liang Li
- Institute of Cell and Development, College of Life Sciences, Zi-Jin-Gang Campus of Zhejiang University, Room 307, No.866, Yuhangtang Road, Hangzhou, 310058, Zhejiang, China
| | - Cuicui Wang
- Institute of Cell and Development, College of Life Sciences, Zi-Jin-Gang Campus of Zhejiang University, Room 307, No.866, Yuhangtang Road, Hangzhou, 310058, Zhejiang, China
| | - Haosong Shi
- Department of Otorhinolaryngology, the Sixth People's Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Yong Fu
- Department of ENT, Head and Neck Surgery, the Children's Hospital, Zhejiang University School of Medicine, Zhejiang, China. .,Department of Otolaryngology, the Children Hospital, School of Medicine, Bin-Jiang Campus of Zhejiang University, No. 3333, Binsheng Road, Hangzhou, 310051, Zhejiang, China.
| | - Jinfu Wang
- Institute of Cell and Development, College of Life Sciences, Zi-Jin-Gang Campus of Zhejiang University, Room 307, No.866, Yuhangtang Road, Hangzhou, 310058, Zhejiang, China.
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Luo WW, Han Z, Ren DD, Wang XW, Chi FL, Yang JM. Notch pathway inhibitor DAPT enhances Atoh1 activity to generate new hair cells in situ in rat cochleae. Neural Regen Res 2017; 12:2092-2099. [PMID: 29323051 PMCID: PMC5784360 DOI: 10.4103/1673-5374.221169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Atoh1 overexpression in cochlear epithelium induces new hair cell formation. Use of adenovirus-mediated Atoh1 overexpression has mainly focused on the rat lesser epithelial ridge and induces ectopic hair cell regeneration. The sensory region of rat cochlea is difficult to transfect, thus new hair cells are rarely produced in situ in rat cochlear explants. After culturing rat cochleae in medium containing 10% fetal bovine serum, adenovirus successfully infected the sensory region as the width of the supporting cell area was significantly increased. Adenovirus encoding Atoh1 infected the sensory region and induced hair cell formation in situ. Combined application of the Notch inhibitor DAPT and Atoh1 increased the Atoh1 expression level and decreased hes1 and hes5 levels, further promoting hair cell generation. Our results demonstrate that DAPT enhances Atoh1 activity to promote hair cell regeneration in rat cochlear sensory epithelium in vitro.
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Affiliation(s)
- Wen-Wei Luo
- Department of Otolaryngology, Eye & ENT Hospital of Fudan University; Research Institute of Otolaryngology, Fudan University, Shanghai, China
| | - Zhao Han
- Department of Otolaryngology, Eye & ENT Hospital of Fudan University; Research Institute of Otolaryngology, Fudan University, Shanghai, China
| | - Dong-Dong Ren
- Department of Otolaryngology, Eye & ENT Hospital of Fudan University; Research Institute of Otolaryngology, Fudan University, Shanghai, China
| | - Xin-Wei Wang
- Department of Otolaryngology, Eye & ENT Hospital of Fudan University; Research Institute of Otolaryngology, Fudan University, Shanghai, China
| | - Fang-Lu Chi
- Department of Otolaryngology, Eye & ENT Hospital of Fudan University; Research Institute of Otolaryngology, Fudan University, Shanghai, China
| | - Juan-Mei Yang
- Department of Otolaryngology, Eye & ENT Hospital of Fudan University; Research Institute of Otolaryngology, Fudan University, Shanghai, China
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