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Hearing Disorders: HELP
Articles by Lei Chen
Based on 3 articles published since 2010
(Why 3 articles?)
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Between 2010 and 2020, Lei Chen wrote the following 3 articles about Hearing Disorders.
 
+ Citations + Abstracts
1 Article A de novo silencer causes elimination of MITF-M expression and profound hearing loss in pigs. 2016

Chen, Lei / Guo, Weiwei / Ren, Lili / Yang, Mingyao / Zhao, Yaofeng / Guo, Zongyi / Yi, Haijin / Li, Mingzhou / Hu, Yiqing / Long, Xi / Sun, Boyuan / Li, Jinxiu / Zhai, Suoqiang / Zhang, Tinghuan / Tian, Shilin / Meng, Qingyong / Yu, Ning / Zhu, Dan / Tang, Guoqing / Tang, Qianzi / Ren, Liming / Liu, Ke / Zhang, Shihua / Che, Tiandong / Yu, Zhengquan / Wu, Nan / Jing, Lan / Zhang, Ran / Cong, Tao / Chen, Siqing / Zhao, Yiqiang / Zhang, Yue / Bai, Xiaoqing / Guo, Ying / Zhao, Lidong / Zhang, Fengming / Zhao, Hui / Zhang, Liang / Hou, Zhaohui / Zhao, Jiugang / Li, Jianan / Zhang, Lijuan / Sun, Wei / Zou, Xiangang / Wang, Tao / Ge, Liangpeng / Liu, Zuohua / Hu, Xiaoxiang / Wang, Jingyong / Yang, Shiming / Li, Ning. ·State Key Laboratory for Agrobiotechnology, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, 100193, China. · Key Laboratory of Pig Industry Sciences (Ministry of Agriculture), Chongqing Academy of Animal Science, Chongqing, 402460, China. · Department of Otolaryngology, Head & Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, 100853, China. · Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan, 625014, China. · Department of Communicative Disorders and Sciences, Center for Hearing and Deafness, State University of New York at Buffalo, Buffalo, New York, USA. · Key Laboratory of Pig Industry Sciences (Ministry of Agriculture), Chongqing Academy of Animal Science, Chongqing, 402460, China. kingyou@vip.sina.com. · Department of Otolaryngology, Head & Neck Surgery, Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, 100853, China. yangsm301@263.net. · State Key Laboratory for Agrobiotechnology, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing, 100193, China. ninglcau@cau.edu.cn. ·BMC Biol · Pubmed #27349893.

ABSTRACT: BACKGROUND: Genesis of novel gene regulatory modules is largely responsible for morphological and functional evolution. De novo generation of novel cis-regulatory elements (CREs) is much rarer than genomic events that alter existing CREs such as transposition, promoter switching or co-option. Only one case of de novo generation has been reported to date, in fish and without involvement of phenotype alteration. Yet, this event likely occurs in other animals and helps drive genetic/phenotypic variation. RESULTS: Using a porcine model of spontaneous hearing loss not previously characterized we performed gene mapping and mutation screening to determine the genetic foundation of the phenotype. We identified a mutation in the non-regulatory region of the melanocyte-specific promoter of microphthalmia-associated transcription factor (MITF) gene that generated a novel silencer. The consequent elimination of expression of the MITF-M isoform led to early degeneration of the intermediate cells of the cochlear stria vascularis and profound hearing loss, as well as depigmentation, all of which resemble the typical phenotype of Waardenburg syndrome in humans. The mutation exclusively affected MITF-M and no other isoforms. The essential function of Mitf-m in hearing development was further validated using a knock-out mouse model. CONCLUSIONS: Elimination of the MITF-M isoform alone is sufficient to cause deafness and depigmentation. To our knowledge, this study provides the first evidence of a de novo CRE in mammals that produces a systemic functional effect.

2 Article [Preliminary experience on endoscopic endonasal management of petrous apex cholesterol granuloma]. 2015

Wang, Jin / Chen, Lei / Yang, Jing. ·Department of Otorhinolaryngology Head and Neck Surgery, Chinese People's Liberation Army General Hospital, People's Liberation Army Medical college, Beijing 100853, China. · Email: chen301@aliyun.com. ·Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi · Pubmed #26178047.

ABSTRACT: OBJECTIVE: To explore the feasibility and related aspects on endoscopic endonasal management of petrous apex cholesterol granuloma. METHODS: Retrospective data analysis was performed on 3 cases in which the endoscopic endonasal approach was used to manage this lesion between 2011 and 2014. Case information including radiological data, surgical technique, symptoms, and complications was reviewed. RESULTS: The main clinical manifestations in these 3 patients were tinnitus, hearing loss at the hearing threshold of 40-50 dBHL. After operation, all 3 patients showed disappearance of their tinnitus and improvement of the hearing threshold of 10-30 dBHL (follow-up 6-45 months). Permanent drainage route was performed in 1 case which communicated with sphenoid sinus. While the other 2 cases which drained to pharyngeal recess resulted in drainage route blocking within the 3-6 months after surgery, but without obvious symptoms. CONCLUSIONS: This procedure for the drainage of petrous apex cholesterol granuloma showed to be effective, safe and minimally invasive. Although there is no recurrence in short-term, however, long-term surveillance and large case series are necessary, especially to the maitainence of permanent drainage.

3 Article Age-related changes in the ratio of Mcl-1/Bax expression in the rat cochlea. 2012

Yang, Wei Ping / Guo, Wei Wei / Liu, Hui Zhan / Xu, Yang / Chen, Lei / Hu, Bo Hua. ·Institute of Otolaryngology, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, PR China. yangwp2002@yahoo.com ·Acta Otolaryngol · Pubmed #22201517.

ABSTRACT: CONCLUSION: Down-regulation of the ratio of Mcl-1/Bax expression may contribute to age-related sensory cell degeneration in the cochlea. OBJECTIVE: To better understand the involvement of Bcl-2 family members in the regulation of age-related sensory cell death, we examined the expression patterns of Bcl-2-associated protein X (Bax) and its suppressor, myeloid cell leukemia 1 (Mcl-1) in young and aging rat cochleae. METHODS: Young (2-3 months) and aging (27-28 months) Fischer rats were used. The auditory brainstem response (ABR) thresholds elicited by tone bursts at 4, 8, 16, 32, and 40 kHz were measured. The expression patterns of Mcl-1 and Bax genes at both the mRNA and protein levels were examined using a real-time RT-PCR assay and Western blot. Distribution of Mcl-1 and Bax expression in the cochlear sensory epithelia was evaluated using immunohistology and nuclear staining. RESULTS: Aging cochleae exhibited a significant elevation of ABR thresholds. This change was accompanied by significant reduction in Mcl-1 expression at both the mRNA and the protein levels and in the ratio of expression levels of Mcl-1/Bax genes in the aging subjects. Importantly, the changes in Mcl-1 and Bax expression are spatially related to the sensory cells showing the sign of degeneration.