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Luo CM, Ke LF, Huang XY, Zhuang XY, Guo ZW, Xiao Q, Chen J, Chen FQ, Yang QM, Ru Y, Weng HF, Xiao AF, Zhang YH. Efficient biosynthesis of prunin in methanol cosolvent system by an organic solvent-tolerant α-L-rhamnosidase from Spirochaeta thermophila. Enzyme Microb Technol 2024; 175:110410. [PMID: 38340378 DOI: 10.1016/j.enzmictec.2024.110410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/29/2024] [Accepted: 02/03/2024] [Indexed: 02/12/2024]
Abstract
Prunin of desirable bioactivity and bioavailability can be transformed from plant-derived naringin by the key enzyme α-L-rhamnosidase. However, the production was limited by unsatisfactory properties of α-L-rhamnosidase such as thermostability and organic solvent tolerance. In this study, biochemical characteristics, and hydrolysis capacity of a novel α-L-rhamnosidase from Spirochaeta thermophila (St-Rha) were investigated, which was the first characterized α-L-rhamnosidase for Spirochaeta genus. St-Rha showed a higher substrate specificity towards naringin and exhibited excellent thermostability and methanol tolerance. The Km of St-Rha in the methanol cosolvent system was decreased 7.2-fold comparing that in the aqueous phase system, while kcat/Km value of St-Rha was enhanced 9.3-fold. Meanwhile, a preliminary conformational study was implemented through comparative molecular dynamics simulation analysis to explore the mechanism underlying the methanol tolerance of St-Rha for the first time. Furthermore, the catalytic ability of St-Rha for prunin preparation in the 20% methanol cosolvent system was explored, and 200 g/L naringin was transformed into 125.5 g/L prunin for 24 h reaction with a corresponding space-time yield of 5.2 g/L/h. These results indicated that St-Rha was a novel α-L-rhamnosidase suitable for hydrolyzing naringin in the methanol cosolvent system and provided a better alternative for improving the efficient production yield of prunin.
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Affiliation(s)
- Chen-Mu Luo
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Li-Fan Ke
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Xiang-Yu Huang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Xiao-Yan Zhuang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
| | - Ze-Wang Guo
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
| | - Qiong Xiao
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
| | - Jun Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
| | - Fu-Quan Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
| | - Qiu-Ming Yang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
| | - Yi Ru
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
| | - Hui-Fen Weng
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
| | - An-Feng Xiao
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China.
| | - Yong-Hui Zhang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, China.
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Wang J, Fan Y, Chen XD, Xue T, Chen FQ. Primary Small Cell Carcinoma in Nasal Cavity and Paranasal Sinuses: 15 Cases From a Single Center. Ear Nose Throat J 2024; 103:227-233. [PMID: 34625002 DOI: 10.1177/01455613211049853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Small cell carcinoma (SCC) in the nasal cavity and sinuses is extremely rare. The clinical data of 15 patients with primary SCC in nasal cavity and sinuses were analyzed retrospectively. All patients were treated with surgery, radiotherapy, and chemotherapy. Of the 15 patients, 2 patients are alive for more than 6 years, and 5 patients died after the median follow-up period (11 months). Most of our patients represent the later stage (73% presented at stage III or IV) and had surgery combined with radiotherapy and chemotherapy; however, nearly half of patients have tumor recurrence and/or distant metastasis. SCC of nasal cavity and sinuses often invades surrounding tissues, and the long-term curative rate is generally low. Early diagnosis and comprehensive treatment are key to improve survival. Although the overall survival time of SCC is not optimistic, it is still recommended that patients take comprehensive treatment.
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Affiliation(s)
- Jian Wang
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Yingying Fan
- Center for Mitochondrial Biology and Medicine and Key Laboratory of Biomedical Information Engineering of the Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xiao-Dong Chen
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Tao Xue
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Fu-Quan Chen
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
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Fan B, Lu F, Du WJ, Chen J, An XG, Wang RF, Li W, Song YL, Zha DJ, Chen FQ. PTEN inhibitor bisperoxovanadium protects against noise-induced hearing loss. Neural Regen Res 2023; 18:1601-1606. [PMID: 36571368 PMCID: PMC10075117 DOI: 10.4103/1673-5374.358606] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Studies have shown that phosphatase and tensin homolog deleted on chromosome ten (PTEN) participates in the regulation of cochlear hair cell survival. Bisperoxovanadium protects against neurodegeneration by inhibiting PTEN expression. However, whether bisperoxovanadium can protect against noise-induced hearing loss and the underlying mechanism remains unclear. In this study, we established a mouse model of noise-induced hearing loss by exposure to 105 dB sound for 2 hours. We found that PTEN expression was increased in the organ of Corti, including outer hair cells, inner hair cells, and lateral wall tissues. Intraperitoneal administration of bisperoxovanadium decreased the auditory threshold and the loss of cochlear hair cells and inner hair cell ribbons. In addition, noise exposure decreased p-PI3K and p-Akt levels. Bisperoxovanadium preconditioning or PTEN knockdown upregulated the activity of PI3K-Akt. Bisperoxovanadium also prevented H2O2-induced hair cell death by reducing mitochondrial reactive oxygen species generation in cochlear explants. These findings suggest that bisperoxovanadium reduces noise-induced hearing injury and reduces cochlear hair cell loss.
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Affiliation(s)
- Bei Fan
- Department of Otolaryngology Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Fei Lu
- Department of Otolaryngology Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Wei-Jia Du
- Department of Otolaryngology Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Jun Chen
- Department of Otolaryngology Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Xiao-Gang An
- Department of Otolaryngology Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Ren-Feng Wang
- Department of Otolaryngology Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Wei Li
- Department of Otolaryngology Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Yong-Li Song
- Department of Otolaryngology Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Ding-Jun Zha
- Department of Otolaryngology Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Fu-Quan Chen
- Department of Otolaryngology Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
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Liu MF, Ma RX, Cao XB, Zhang H, Zhou SH, Jiang WH, Jiang Y, Sun JW, Yang QT, Li XZ, Sun YN, Shi L, Wang M, Song XC, Chen FQ, Zhang XS, Wei HQ, Yu SQ, Zhu DD, Ba L, Cao ZW, Xiao XP, Wei X, Lin ZH, Chen FH, Shan CG, Wang GK, Ye J, Qu SH, Zhao CQ, Wang ZL, Li HB, Liu F, Cui XB, Ye SN, Liu Z, Xu Y, Cai X, Hang W, Zhang RX, Zhao YL, Yu GD, Shi GG, Lu MP, Shen Y, Zhao YT, Pei JH, Xie SB, Yu LG, Liu YH, Gu SS, Yang YC, Cheng L, Liu JF. [Incidence and prognosis of olfactory and gustatory dysfunctions related to infection of SARS-CoV-2 Omicron strain: a national multi-center survey of 35 566 population]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2023; 58:579-588. [PMID: 37339898 DOI: 10.3760/cma.j.cn115330-20230316-00117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
Objective: This cross-sectional investigation aimed to determine the incidence, clinical characteristics, prognosis, and related risk factors of olfactory and gustatory dysfunctions related to infection with the SARS-CoV-2 Omicron strain in mainland China. Methods: Data of patients with SARS-CoV-2 from December 28, 2022, to February 21, 2023, were collected through online and offline questionnaires from 45 tertiary hospitals and one center for disease control and prevention in mainland China. The questionnaire included demographic information, previous health history, smoking and alcohol drinking, SARS-CoV-2 vaccination, olfactory and gustatory function before and after infection, other symptoms after infection, as well as the duration and improvement of olfactory and gustatory dysfunction. The self-reported olfactory and gustatory functions of patients were evaluated using the Olfactory VAS scale and Gustatory VAS scale. Results: A total of 35 566 valid questionnaires were obtained, revealing a high incidence of olfactory and taste dysfunctions related to infection with the SARS-CoV-2 Omicron strain (67.75%). Females(χ2=367.013, P<0.001) and young people(χ2=120.210, P<0.001) were more likely to develop these dysfunctions. Gender(OR=1.564, 95%CI: 1.487-1.645), SARS-CoV-2 vaccination status (OR=1.334, 95%CI: 1.164-1.530), oral health status (OR=0.881, 95%CI: 0.839-0.926), smoking history (OR=1.152, 95%CI=1.080-1.229), and drinking history (OR=0.854, 95%CI: 0.785-0.928) were correlated with the occurrence of olfactory and taste dysfunctions related to SARS-CoV-2(above P<0.001). 44.62% (4 391/9 840) of the patients who had not recovered their sense of smell and taste also suffered from nasal congestion, runny nose, and 32.62% (3 210/9 840) suffered from dry mouth and sore throat. The improvement of olfactory and taste functions was correlated with the persistence of accompanying symptoms(χ2=10.873, P=0.001). The average score of olfactory and taste VAS scale was 8.41 and 8.51 respectively before SARS-CoV-2 infection, but decreased to3.69 and 4.29 respectively after SARS-CoV-2 infection, and recovered to 5.83and 6.55 respectively at the time of the survey. The median duration of olfactory and gustatory dysfunctions was 15 days and 12 days, respectively, with 0.5% (121/24 096) of patients experiencing these dysfunctions for more than 28 days. The overall self-reported improvement rate of smell and taste dysfunctions was 59.16% (14 256/24 096). Gender(OR=0.893, 95%CI: 0.839-0.951), SARS-CoV-2 vaccination status (OR=1.334, 95%CI: 1.164-1.530), history of head and facial trauma(OR=1.180, 95%CI: 1.036-1.344, P=0.013), nose (OR=1.104, 95%CI: 1.042-1.171, P=0.001) and oral (OR=1.162, 95%CI: 1.096-1.233) health status, smoking history(OR=0.765, 95%CI: 0.709-0.825), and the persistence of accompanying symptoms (OR=0.359, 95%CI: 0.332-0.388) were correlated with the recovery of olfactory and taste dysfunctions related to SARS-CoV-2 (above P<0.001 except for the indicated values). Conclusion: The incidence of olfactory and taste dysfunctions related to infection with the SARS-CoV-2 Omicron strain is high in mainland China, with females and young people more likely to develop these dysfunctions. Active and effective intervention measures may be required for cases that persist for a long time. The recovery of olfactory and taste functions is influenced by several factors, including gender, SARS-CoV-2 vaccination status, history of head and facial trauma, nasal and oral health status, smoking history, and persistence of accompanying symptoms.
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Affiliation(s)
- M F Liu
- Graduate School of Beijing University of Chinese Medicine, Beijing 100029, China Department of Otorhinolaryngology Head and Neck Surgery, China-Japan Friendship Hospital, Beijing 100029, China
| | - R X Ma
- Department of Otorhinolaryngology Head and Neck Surgery, the First People's Hospital of Yinchuan, Yinchuan 750001, China
| | - X B Cao
- Department of Otorhinolaryngology, the First People's Hospital of Yunnan Province, Kunming 650100, China
| | - H Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, China
| | - S H Zhou
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310003, China
| | - W H Jiang
- Department of Otorhinolaryngology Head and Neck Surgery, Xiangya Hospital Central South University, Changsha 410008, China
| | - Y Jiang
- Department of Otorhinolaryngology Head and Neck Surgery, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - J W Sun
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of USTC, Hefei 230001, China
| | - Q T Yang
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - X Z Li
- Department of Otorhinolaryngology Head and Neck Surgery, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Y N Sun
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - L Shi
- Department of Rhinology and Allergy, Shandong Provincial ENT Hospital, Shandong University, Jinan 250299, China
| | - M Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Peking University People's Hospital, Beijing 100032, China
| | - X C Song
- Department of Otorhinolaryngology Head and Neck Surgery, Yantai Yuhuangding Hospital, Qingdao University, Yantai 264000, China
| | - F Q Chen
- Department of Otorhinolaryngology Head and Neck Surgery, Xijing Hospital, the Fourth Military Medical University, Xi'an 710032, China
| | - X S Zhang
- Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China
| | - H Q Wei
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of China Medical University, Shenyang 110001, China
| | - S Q Yu
- Department of Otorhinolaryngology Head and Neck Surgery, Tongji Hospital, Tongji Medical University, Shanghai 200065, China
| | - D D Zhu
- Department of Otorhinolaryngology Head and Neck Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - L Ba
- Department of Otorhinolaryngology Head and Neck Surgery, Xizang Autonomous Region People's Hospital, Lasa 850000, China
| | - Z W Cao
- Department of Otorhinolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - X P Xiao
- Department of Otorhinolaryngology Head and Neck Surgery, Hunan Provincial People's Hospital, Changsha 410005, China
| | - X Wei
- Department of Otorhinolaryngology Head and Neck Surgery, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou 570311, China
| | - Z H Lin
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310009, China
| | - F H Chen
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - C G Shan
- Department of Otorhinolaryngology Head and Neck Surgery, the Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
| | - G K Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - J Ye
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - S H Qu
- Department of Otorhinolaryngology Head and Neck Surgery, Guangxi Zhuang Autonomous Region People's Hospital, Nanning 530021, China
| | - C Q Zhao
- Department of Otorhinolaryngology Head and Neck Surgery, Shanxi Medical University Affiliated Second Hospital, Taiyuan 030001, China
| | - Z L Wang
- Department of Otorhinolaryngology Head and Neck Surgery, XuanWu Hospital, Capital Medical University, Beijing 100053, China
| | - H B Li
- Department of Otorhinolaryngology Head and Neck Surgery, Eye, Ear, Nose and Throat Hospital, Shanghai Medical College, Fudan University, Shanghai 200031, China
| | - F Liu
- Department of Otorhinolaryngology Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - X B Cui
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010059, China
| | - S N Ye
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Z Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Y Xu
- Department of Otorhinolaryngology Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - X Cai
- Department of Otorhinolaryngology Head and Neck Surgery, Qinghai Provincial People's Hospital, Xining 810000, China
| | - W Hang
- Department of Otorhinolaryngology Head and Neck Surgery, Tianjin Huanhu Hospital, Tianjin 300350, China
| | - R X Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Y L Zhao
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - G D Yu
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
| | - G G Shi
- Department of Otorhinolaryngology Head and Neck Surgery, Shandong Provincial Hospital, Affiliated to Shandong First Medical University, Jinan 250021, China
| | - M P Lu
- Department of Otorhinolaryngology, the First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China
| | - Y Shen
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Y T Zhao
- Department of Otorhinolaryngology Head and Neck Surgery, the First People's Hospital of Yinchuan, Yinchuan 750001, China
| | - J H Pei
- Department of Otorhinolaryngology, the First People's Hospital of Yunnan Province, Kunming 650100, China
| | - S B Xie
- Department of Otorhinolaryngology Head and Neck Surgery, Xiangya Hospital Central South University, Changsha 410008, China
| | - L G Yu
- Department of Otorhinolaryngology Head and Neck Surgery, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - Y H Liu
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - S S Gu
- Department of Otorhinolaryngology Head and Neck Surgery, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Y C Yang
- Department of Otorhinolaryngology Head and Neck Surgery, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - L Cheng
- Department of Otorhinolaryngology, the First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China
| | - J F Liu
- Department of Otorhinolaryngology Head and Neck Surgery, China-Japan Friendship Hospital, Beijing 100029, China
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Jiang F, Xu XW, Chen FQ, Weng HF, Chen J, Ru Y, Xiao Q, Xiao AF. Extraction, Modification and Biomedical Application of Agarose Hydrogels: A Review. Mar Drugs 2023; 21:md21050299. [PMID: 37233493 DOI: 10.3390/md21050299] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 05/04/2023] [Accepted: 05/12/2023] [Indexed: 05/27/2023] Open
Abstract
Numerous compounds present in the ocean are contributing to the development of the biomedical field. Agarose, a polysaccharide derived from marine red algae, plays a vital role in biomedical applications because of its reversible temperature-sensitive gelling behavior, excellent mechanical properties, and high biological activity. Natural agarose hydrogel has a single structural composition that prevents it from adapting to complex biological environments. Therefore, agarose can be developed into different forms through physical, biological, and chemical modifications, enabling it to perform optimally in different environments. Agarose biomaterials are being increasingly used for isolation, purification, drug delivery, and tissue engineering, but most are still far from clinical approval. This review classifies and discusses the preparation, modification, and biomedical applications of agarose, focusing on its applications in isolation and purification, wound dressings, drug delivery, tissue engineering, and 3D printing. In addition, it attempts to address the opportunities and challenges associated with the future development of agarose-based biomaterials in the biomedical field. It should help to rationalize the selection of the most suitable functionalized agarose hydrogels for specific applications in the biomedical industry.
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Affiliation(s)
- Feng Jiang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
| | - Xin-Wei Xu
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Fu-Quan Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Hui-Fen Weng
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Jun Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Yi Ru
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Qiong Xiao
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - An-Feng Xiao
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
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Zhang YH, Chen YY, Zhuang XY, Xiao Q, Chen J, Chen FQ, Yang QM, Weng HF, Fang BS, Xiao AF. A Novel κ-Carrageenase from Marine Bacterium Rhodopirellula sallentina SM41: Heterologous Expression, Biochemical Characterization and Salt-Tolerance Mechanism Investigation. Mar Drugs 2022; 20:md20120783. [PMID: 36547930 PMCID: PMC9783963 DOI: 10.3390/md20120783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/12/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022] Open
Abstract
κ-carrageenases are members of the glycoside hydrolase family 16 (GH16) that hydrolyze sulfated galactans in red algae, known as κ-carrageenans. In this study, a novel κ-carrageenase gene from the marine bacterium Rhodopirellula sallentina SM41 (RsCgk) was discovered via the genome mining approach. There are currently no reports on κ-carrageenase from the Rhodopirellula genus, and RsCgk shares a low identity (less than 65%) with κ- carrageenase from other genera. The RsCgk was heterologously overexpressed in Escherichia coli BL21 and characterized for its enzymatic properties. RsCgk exhibited maximum activity at pH 7.0 and 40 °C, and 50% of its initial activity was retained after incubating at 30 °C for 2 h. More than 70% of its activity was maintained after incubation at pH 6.0-8.0 and 4 °C for 24 h. As a marine derived enzyme, RsCgk showed excellent salt tolerance, retaining full activity in 1.2 M NaCl, and the addition of NaCl greatly enhanced its thermal stability. Mass spectrometry analysis of the RsCgk hydrolysis products revealed that the enzyme had high degradation specificity and mainly produced κ-carrageenan disaccharide. Comparative molecular dynamics simulations revealed that the conformational changes of tunnel-forming loops under salt environments may cause the deactivation or stabilization of RsCgk. Our results demonstrated that RsCgk could be utilized as a potential tool enzyme for efficient production of κ-carrageenan oligosaccharides under high salt conditions.
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Affiliation(s)
- Yong-Hui Zhang
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
- Correspondence: (Y.-H.Z.); (A.-F.X.); Tel.: +86-592-6181487 (Y.-H.Z.); +86-592-6180075 (A.-F.X.)
| | - Yi-Ying Chen
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Xiao-Yan Zhuang
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Qiong Xiao
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Jun Chen
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Fu-Quan Chen
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Qiu-Ming Yang
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Hui-Fen Weng
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Bai-Shan Fang
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361021, China
| | - An-Feng Xiao
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
- Correspondence: (Y.-H.Z.); (A.-F.X.); Tel.: +86-592-6181487 (Y.-H.Z.); +86-592-6180075 (A.-F.X.)
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Tang X, Liu CL, Chen YY, Wei Y, Zhuang XY, Xiao Q, Chen J, Chen FQ, Yang QM, Weng HF, Fang BS, Zhang YH, Xiao AF. Combination of simultaneous extraction–hydrolysis and intermittent feeding of tara pod for efficient production of gallic acid. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Xu M, Wang J, Chen XD, Xue T, Chen FQ. Comparison of two surgical approaches in the management of cerebrospinal fluid rhinorrhea in the lateral recess of sphenoid sinus: A retrospective study. Ear Nose Throat J 2022:1455613221112760. [PMID: 35796349 DOI: 10.1177/01455613221112760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Cerebrospinal fluid (CSF) leakage from the lateral recess of the sphenoid sinus (LRSS) is usually repaired using endoscopic endonasal approaches, which can be challenging. Various surgical techniques have been developed for the disease. OBJECTIVE To report our experience with repairing CSF leak from the LRSS via transethmoid sphenoidotomy approach (TESA) and transprelacrimal recess pterygoid root approach (TPLRA), to assess the efficiency of TPLRA by comparing it with TESA. METHODS This retrospective study included patients with LRSS CSF rhinorrhea who underwent TESA (n = 10) or TPLRA (n = 5) from January 2011 to December 2020. Demographic characteristics and operation-related parameters were recorded. RESULTS The mean operation time was 169.5 and 225.0 mins in the TESA and TPLRA groups, respectively, with a mean blood loss of 65 mL and 68 mL, respectively. Histopathological examinations confirmed encephalocele in 11 (73.33%) and 4 (26.67%) cases with meningocele, respectively. CSF rhinorrhea was successfully repaired in the first attempt in both groups during the mean follow-up time of 54 months. Postoperative permanent numbness of the cheek was observed in two patients in the TESA group. No cases of lacrimal overflow or subjective dry eye were observed. CONCLUSIONS The TPLRA, which could be an alternative procedure to treat CSF rhinorrhea in the LRSS, provides a straight-line trajectory and effective maneuverability. We also found that CSF rhinorrhea in the LRSS was accompanied by encephalocele or meningocele, with encephalocele presenting more commonly.
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Affiliation(s)
- Min Xu
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Jian Wang
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Xiao-Dong Chen
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Tao Xue
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Fu-Quan Chen
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
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Xue T, Wei L, Zha DJ, Qiu JH, Chen FQ, Qiao L, Qiu Y. [Corrigendum] miR‑29b overexpression induces cochlear hair cell apoptosis through the regulation of SIRT1/PGC‑1α signaling: Implications for age‑related hearing loss. Int J Mol Med 2022; 49:45. [PMID: 35137916 PMCID: PMC8846939 DOI: 10.3892/ijmm.2022.5100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 08/25/2016] [Indexed: 11/05/2022] Open
Abstract
Subsequently to the publication of the above paper, an interested reader drew to the authors' attention that the bar charts shown in Fig. 4A and B, which were intending to have shown the RT‑qPCR and western blot analyses of SIRT1 and PGC‑1α in HEI‑OC1 cells, respectively, under different experimental conditions were apparently identical. Similarly, in Fig. 5, the histograms shown in Fig. 5C and D, which were intending to have shown the RT‑qPCR and western blot analyses, respectively, of SIRT1 and PGC‑1α in HEI‑OC1 cells subjected to different treatments were also apparently identical. The authors have re‑examined their data, and realize that the data properly belonging to the protein expression levels had been wrongly used to show the mRNA levels, and therefore Figs. 4A and 5C were presented incorrectly in these figures. The revised versions of Figs. 4 and 5, containing the correct data for the RT‑qPCR experiments in Figs. 4A and 5C, are shown on the next page. These errors did not affect the major conclusions reported in the paper. All the authors have agreed to this corrigendum, and thank the Editor of International Journal of Molecular Medicine for allowing them the opportunity to publish this. The authors regret these errors went unnoticed during the compilation of the figures in question, and apologize to the readership for any confusion that this may have caused. [the original article was published in International Journal of Molecular Medicine 38: 1387‑1394, 20186 DOI: 10.3892/ijmm.2016.2735].
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Affiliation(s)
- Tao Xue
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Li Wei
- Department of Obstetrics and Gynecology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Ding-Jun Zha
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Jian-Hua Qiu
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Fu-Quan Chen
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Li Qiao
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Yang Qiu
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
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Wang J, Tian KY, Fang Y, Chang HM, Han YN, Chen FQ. Sulforaphane attenuates cisplatin-induced hearing loss by inhibiting histone deacetylase expression. Int J Immunopathol Pharmacol 2021; 35:20587384211034086. [PMID: 34344210 PMCID: PMC8351026 DOI: 10.1177/20587384211034086] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Cruciferous vegetables are a rich source of sulforaphane (SFN), which acts as a natural HDAC inhibitor (HDACi). Our previous study found that HDACi could restore histone acetyltransferase/histone deacetylase (HAT/HDAC) balance in the cochlea and attenuate gentamicin-induced hearing loss in guinea pigs. Here, we investigated the protective effect of SFN on cisplatin-induced hearing loss (CIHL). METHODS Thirty rats were randomly divided into 3 equal groups: the control group, cisplatin group, and SFN+cisplatin group. Rats were injected with SFN (30 mg/kg once a day) and cisplatin (7 mg/kg twice a day) for 7 days to investigate the protective role of SFN on CIHL. We observed auditory brainstem response (ABR) threshold shifts and immunostained cochlear basilar membranes of rats. For in vitro experiments, we treated HEI-OC1 cells and rat cochlear organotypic cultures with SFN (5, 10, and 15 μM) and cisplatin (10 μM). Immunofluorescence, cell viability, and protein analysis were performed to further analyze the protective mechanism of SFN on CIHL. RESULTS SFN (30 mg/kg once a day) decreased cisplatin (7 mg/kg twice a day)-induced ABR threshold shifts and outer hair cell loss. CCK-8 assay showed that cisplatin (10 μM) reduced the viability of HEI-OC1 cells to 42%, and SFN had a dose-dependent protective effect. In cochlear organotypic cultures, we found that SFN (10 and 15 μM) increased cisplatin (10 μM)-induced myosin 7a+ cell count and restored ciliary morphology. SFN (5, 10, and 15 μM) reversed the cisplatin (10 μM)-induced increase in HDAC2, -4, and -5 and SFN (15 μM) reversed the cisplatin (10 μM)-induced decrease in H3-Ack9 [acetyl-histone H3 (Lys9)] protein expression in HEI-OC1 cells. Neither cisplatin nor cisplatin combined with SFN affected the expression of HDAC7, or HDAC9. CONCLUSION SFN prevented disruption of the HAT/HDAC balance, protecting against CIHL in rats.
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Affiliation(s)
- Jie Wang
- Department of Otolaryngology-Head and Neck Surgery, The Affiliated Children Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Ke-Yong Tian
- Department of Otolaryngology-Head and Neck Surgery, Xijing Hospital, Xi'an, China
| | - Ying Fang
- Department of Otolaryngology-Head and Neck Surgery, The Affiliated Children Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Hui-Min Chang
- Department of Otolaryngology-Head and Neck Surgery, Xijing Hospital, Xi'an, China
| | - Ya-Nan Han
- Department of Otolaryngology-Head and Neck Surgery, The Affiliated Children Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Fu-Quan Chen
- Department of Otolaryngology-Head and Neck Surgery, Xijing Hospital, Xi'an, China
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11
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Cheng L, Li HB, Zhang YM, Zhao CQ, Chen FQ, Shi L, Li N, Yang BB, Li Y, Li HJ, Ye SN, Tao ZZ, Zhang GH, Xu R, Yang QT, Zhu DD, Liu F, Zhang H, Yang YC, Lin P, Qiu CY, Zhou B. A nationwide survey of otolaryngologists' compliance with Chinese guidelines for diagnosis and treatment of allergic rhinitis. World Allergy Organ J 2021; 14:100552. [PMID: 34178240 PMCID: PMC8192728 DOI: 10.1016/j.waojou.2021.100552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 04/06/2021] [Accepted: 04/27/2021] [Indexed: 02/05/2023] Open
Abstract
Background A higher compliance with clinical guidelines helps improve treatment outcomes. But the clinical practice of otolaryngologists is not always consistent with guidelines. Objective To describe otolaryngologists’ compliance with guidelines about allergic rhinitis (AR) management and identify factors responsible for the discordance between clinical practice and guideline recommendations in China. Methods A cross-sectional nationwide survey was designed and conducted via an online platform. Recruitment was done by emailing otolaryngologists registered in the Chinese Society of Otorhinolaryngology-Head and Neck Surgery or by inviting otolaryngologists to scan a Quick Respond (QR) code that linked to the questionnaire at various academic meetings. Results A total of 2142 otolaryngologists were eligible and completed the survey. Of them, 64.7% had over 10 years work experience and 97.4% had a bachelor's degree or higher. About 18.3% of the participants strictly copied the guideline in clinical practice, while 73.7% used the guideline that had been adjusted according to their clinical experience. Otolaryngologists were most concerned about the efficacy, safety, and minimum age of AR medications, and least concerned about patient preferences. Regarding the use of intranasal steroids (INS), leukotriene receptor antagonists (LTRA), and H1-antihistamines, 86.8%, 55.7% and 51.2% of otolaryngologists complied with the guideline recommendations, respectively. Educational background was a factor affecting the compliance with guidelines and acceptance of INS. Conclusion A vast majority of Chinese otolaryngologists complied with the current Chinese AR guidelines. A difference still existed between the otolaryngologists' real-world and guideline-recommended management. The otolaryngologists should pay more attention to patient preferences. A higher education could improve otolaryngologists’ adherence to the guidelines.
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Affiliation(s)
- Lei Cheng
- Department of Otorhinolaryngology & Clinical Allergy Center, The First Affiliated Hospital, Nanjing Medical University, Nanjing, China.,International Centre for Allergy Research, Nanjing Medical University, Nanjing, China
| | - Hua-Bin Li
- Department of Otolaryngology-Head Neck Surgery, Affiliated Eye, Ear, Nose and Throat Hospital, Fudan University, Shanghai, China
| | - Ya-Mei Zhang
- Department of Otolaryngology-Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Chang-Qing Zhao
- Department of Otolaryngology-Head and Neck Surgery, Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Fu-Quan Chen
- Department of Otolaryngology-Head and Neck Surgery, Xijing Hospital, Air Force Medical University of PLA, Xi'an, China
| | - Li Shi
- Department of Nasal Allergy, Shandong Provincial ENT Hospital, Shandong University, Jinan, China
| | - Na Li
- Department of Otorhinolaryngology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Bei-Bei Yang
- Department of Otorhinolaryngology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yong Li
- Department of Otolaryngology, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hui-Jun Li
- Department of Otorhinolaryngology-Head and Neck Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Sheng-Nan Ye
- Department of Otolaryngology, The First Affiliated Hospital, Fujian Medical University, Fuzhou, China
| | - Ze-Zhang Tao
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital, Wuhan University, Wuhan, China
| | - Ge-Hua Zhang
- Department of Otolaryngology-Head Neck Surgery, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Rui Xu
- Department of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Qin-Tai Yang
- Department of Otolaryngology-Head Neck Surgery, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Allergy, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Dong-Dong Zhu
- Department of Otorhinolaryngology-Head and Neck Surgery, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Feng Liu
- Department of Otolaryngology, West China Hospital, Sichuan University, Chengdu, China
| | - Hua Zhang
- Department of Otolaryngology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Yu-Cheng Yang
- Department of Otolaryngology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Peng Lin
- Department of Otorhinolaryngology-Head and Neck Surgery, Tianjin First Central Hospital, School of Medicine, Nankai University, Tianjin, China
| | - Chang-Yu Qiu
- Department of Otorhinolaryngology & Clinical Allergy Center, The First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Bing Zhou
- Department of Otolaryngology-Head and Neck Surgery, Beijing TongRen Hospital, Capital Medical University, Beijing, China
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Lu F, Wei L, Yang C, Qiao Y, Liu YS, Chen XD, Wang J, Shi ZH, Chen FQ, Zha DJ, Xue T. Nrg1/ErbB2 regulates differentiation and apoptosis of neural stem cells in the cochlear nucleus through PI3K/Akt pathway. Neurosci Lett 2021; 751:135803. [PMID: 33705930 DOI: 10.1016/j.neulet.2021.135803] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 02/09/2021] [Accepted: 03/01/2021] [Indexed: 12/21/2022]
Abstract
Sensorineural hearing loss (SNHL) is a common causes of disability. Neural stem cells (NSCs) from the cochlear nuclei have been considered to be a potential direction for the treatment of SNHL. Neuregulin 1 (NRG1)/ErbB2 signaling displays an essential role in nervous system development. In this study, we aimed to explore the roles of NRG1/ErbB2 in differentiation and apoptosis of cochlear nuclei NSCs. The data showed that the expression of NGR1 and ErbB2 in cochlear nuclei NSCs isolated from rats were increased with the age of rats. NRG1 treatment reduced the nestin-positive cells number, increased the MAP2-positive and GFAP-positive cells number, decreased the expression of cleaved-caspase-3, and increased the activation of PI3K/AKT. ErbB2 knockdown by lentiviral-mediated ErbB2 shRNA infection reversed the effect of NRG1 on cochlear nuclei NSCs. LY294002 administration further enhanced the effect of ErbB2 silencing on the expression of nestin, MAP2, GFAP and cleaved-caspase-3. Taken together, NRG1/ErbB2 regulates differentiation and apoptosis of cochlear nucleus NSCs through PI3K/Akt pathway.
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Affiliation(s)
- Fei Lu
- Departments of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China
| | - Li Wei
- Departments of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China
| | - Chun Yang
- Departments of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China
| | - Yan Qiao
- Departments of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China
| | - Yong-Shou Liu
- Departments of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China
| | - Xiao-Dong Chen
- Departments of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China
| | - Jian Wang
- Departments of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China
| | - Zhao-Hui Shi
- Departments of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China
| | - Fu-Quan Chen
- Departments of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China
| | - Ding-Jun Zha
- Departments of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China.
| | - Tao Xue
- Departments of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China.
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Fang XH, Zou MY, Chen FQ, Ni H, Nie SP, Yin JY. An overview on interactions between natural product-derived β-glucan and small-molecule compounds. Carbohydr Polym 2021; 261:117850. [PMID: 33766346 DOI: 10.1016/j.carbpol.2021.117850] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 02/20/2021] [Accepted: 02/21/2021] [Indexed: 11/28/2022]
Abstract
β-Glucans are widely found in plants and microorganisms, which has a variety of functional activities. During production and application, interactions with other components have a great influence on the structure and functional properties of β-glucan. In this paper, interactions (including non-covalent interaction and free-radical reaction) between natural product derived β-glucan and ascorbic acid, polyphenols, bile acids/salts, metal ion or other compounds were summarized. Besides, the mechanism and influence factors of interactions between β-glucan and small-molecule compounds, and their effects on the functional properties of β-glucan were detailed. This review aims to develop an understanding and practical suggestions on interactions between β-glucan and small-molecule compounds, which is expected to provide a useful reference for processing and application.
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Affiliation(s)
- Xiao-Hui Fang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Ming-Yue Zou
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Fu-Quan Chen
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Jimei University, Xiamen, Fujian 361021, China
| | - Hui Ni
- Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering, Jimei University, Xiamen, Fujian 361021, China
| | - Shao-Ping Nie
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Jun-Yi Yin
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China.
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Li DF, Shi L, Wang J, Yue B, Ding ZJ, Chen FQ. Endoscopic Trans-Lateral Molar Approach to Infratemporal Fossa Lesions. Ear Nose Throat J 2020; 100:1017S-1022S. [PMID: 32538672 DOI: 10.1177/0145561320934593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND To study the endoscopic trans-lateral molar (ETLM) approach to infratemporal fossa (ITF) lesions and analyze the advantages and disadvantages of this method. METHODS Four cases of ITF lesions were analyzed retrospectively. The clinical features, diagnosis and treatments, the operative process, and clinical applications of this surgical approach were discussed. RESULTS Postoperative pathologies were 2 pleomorphic adenomas, 1 schwannoma, and 1 inflammatory lesion. All patients had self-resolving cheek swelling and pharyngalgia in the short term, but 2 patients had numbness in the long term. There was no infection or bleeding in the postoperative period, and no difficulty in chewing after disease recovery. There was no tumor recurrence during the follow-up period. CONCLUSION The ETLM approach is convenient, minimally invasive, and allows complete excision of benign ITF lesions, posterior to the lateral pterygoid muscle and mainly below the level of the hard palate. It is a simple and direct access to the ITF, but it is a narrow access because of the limitations of bones and soft tissues. Appropriate patient selection is mandatory for successful surgery.
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Affiliation(s)
- Dan-Feng Li
- Department of Otolaryngology-Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Li Shi
- Department of Otolaryngology-Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Jian Wang
- Department of Otolaryngology-Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Bo Yue
- Department of Otolaryngology-Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Zhong-Jia Ding
- Department of Otolaryngology-Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
| | - Fu-Quan Chen
- Department of Otolaryngology-Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
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Wang J, Cui M, Sun F, Zhou K, Fan B, Qiu JH, Chen FQ. HDAC inhibitor sodium butyrate prevents allergic rhinitis and alters lncRNA and mRNA expression profiles in the nasal mucosa of mice. Int J Mol Med 2020; 45:1150-1162. [PMID: 32124940 PMCID: PMC7053856 DOI: 10.3892/ijmm.2020.4489] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 01/17/2020] [Indexed: 12/21/2022] Open
Abstract
Our previous study demonstrated that intranasal administration of histone deacetylase inhibitor sodium butyrate (NaB) exhibits therapeutic effects on a mouse model of allergic rhinitis (AR). However, whether NaB is effective on AR when administered orally and prophylactically, as well as its potential effects on gene expression, remained unknown. The present study aimed to investigate the preventive effect of NaB on AR when added to the diet of newly weaned mice and to evaluate the changes in long non-coding (lnc)RNA and mRNA expression profiles in the nasal mucosa. Mice were randomly divided into three groups as follows: i) Control (C) group, (no treatment); ii) AR group [treated with ovalbumin (OVA)]; and iii) NaB + AR group (treated with OVA and NaB). The NaB + AR group was administered NaB in their feed (30 g/kg chow), whereas the other two groups were fed normal feed between 3 and 6 weeks of age. At 7 weeks of age, OVA administration was initiated to induce AR in the AR and NaB + AR groups. Following model establishment, behavioral assessments, western blotting and gene expression analysis were performed. NaB exhibited a preventive effect in the murine AR model, diminished the increases in histone deacetylase 1 (HDAC1) and HDAC8 expression and increased OVA-induced acetylation of histone H3 at lysine 9. In addition, NaB increased the AR-associated low expression of interleukin 2 (IL-2), interferon γ and IL-17 and decreased the expression of IL-4, IL-5 and transforming growth factor β1. Gene Ontology and pathway analyses revealed the top 10 pathways among the groups. Octamer-binding transcription factor 1, ecotropic viral integration site 1 and paired box 4 were predicted to be target genes of lncRNA (NONMMUT057309). Thus, NaB may exhibit a preventive effect on AR. Additionally, the lncRNA and mRNA expression profiles in the nasal mucosa of mice with AR differed significantly following NaB treatment. These results may provide insights into the pathogenesis of AR and suggest new treatment targets.
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Affiliation(s)
- Jie Wang
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Mu Cui
- School of Nursing, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China
| | - Fei Sun
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Ke Zhou
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Bei Fan
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Jian-Hua Qiu
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Fu-Quan Chen
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
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Chen FQ. [Eosinophil and chronic rhinosinusitis]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:901-904. [PMID: 31623030 DOI: 10.13201/j.issn.1001-1781.2019.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Indexed: 11/12/2022]
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Wang J, Chang HH, Wei M, Chen FQ, Qiu JH. [Effect of sublingual dust mite drops on single or multiple allergens allergic rhinitis in children]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:1646-1649. [PMID: 30400689 DOI: 10.13201/j.issn.1001-1781.2018.21.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Indexed: 11/12/2022]
Abstract
Objective:Evaluation of the efficacy of standardized dust mite drops in sublingual immunotherapy(SLIT) for allergic rhinitis in children.Method:A retrospective analysis of 174 children who received SLIT with standardized dermatophagoides farinae drops for 2 years.These patients had been divided into two groups:monoasensitized group(n=61) and polysensitized group(n=113).The total medication score(TMS),total nasal symptoms score(TNSS) and inflammatory factors were evaluated before and after SLIT treatment.Result:①After SLIT treatment for 2.0 year,the TNSS in the monosensitized group is(11.27±1.46) and(3.48±1.50),polyasensitized group is (11.54±1.50) and (3.59±1.56),there are significant difference of TNSS between two groups(P<0.01).But the improvements of the TNSS between the two groups have no significant difference(P>0.05),the monosensitized group is(7.68±3.23); polysensitized group is (8.14±2.56). ②Two groups of children with TMS before and after treatment were obviously improved, monosensitized group is (1.67±0.43) and (0.52±0.40),polysensitized group is(1.64±0.44) and (0.55±0.41). There are significant difference of TMS between two groups(P<0.01).But the improvements of the TMS between the two groups have no obvious difference(P>0.05),the monsensitized group is(1.16±0.61); polysensitized group is(1.28±0.55).③Specific IgG4 serum is increased after treatment(P<0.01).④After immunotherapy,the expression of IL4 and IL-17α is downregulated, IL-2 and TGF-β1 is up-regulated.Conclusion:①Dust mites under the SLIT,can significantly improve the monosensitized and polyasensitized allergic children nasal symptoms,reduce the drug use, and two groups have the equivalent effect.②Dust mite drops SLIT,can be used to the monosensitized and polyasensitized allergic children.③The rise of dust mites specific IgG4 can be used as immunotherapy effective predictors.④After immunotherapy, Thl/Th2 /Thl7 and Treg can be rebalanced.
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Affiliation(s)
- J Wang
- Department of Otorhinolaryngology Head and Neck Surgery,Xi'an Children's Hospital,Xi'an, 710003,China
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Song YL, Tian KY, Mi WJ, Ding ZJ, Qiu Y, Chen FQ, Zha DJ, Qiu JH. Decreased expression of TERT correlated with postnatal cochlear development and proliferation reduction of cochlear progenitor cells. Mol Med Rep 2018; 17:6077-6083. [PMID: 29436610 DOI: 10.3892/mmr.2018.8565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Accepted: 01/17/2018] [Indexed: 11/06/2022] Open
Abstract
Cochlear progenitor cells are considered as one of the best candidates for hair cell regeneration, thus, the regulation of cochlear progenitor cell proliferation has become a focus in this field. Several genes expressed in the inner ear during postnatal development have been demonstrated to be involved in maintaining the proliferative potential of progenitor cells, but the mechanism for regulating the proliferation and differentiation of cochlear progenitor cells remains poorly understood. Telomerase reverse transcriptase (TERT) has rate limiting telomerase activity and the overexpression of TERT has been shown to promote cell proliferation in series of cell lines. The aim of the present study was to evaluate the expression of TERT in the postnatal development of the cochlea and progenitor cells. The results demonstrated that TERT was expressed in the basilar membranes during the first postnatal week. In vitro, TERT expression in progenitor cells reached a maximum at day 4 after culture and decreased as the culture time prolonged or the cell passage number increased. These results led us to hypothesize that TERT may be involved in the development of the cochlea and in maintaining the proliferation ability of progenitor cells.
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Affiliation(s)
- Yong-Li Song
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Ke-Yong Tian
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Wen-Juan Mi
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Zhong-Jia Ding
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Yang Qiu
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Fu-Quan Chen
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Ding-Jun Zha
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Jian-Hua Qiu
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710032, P.R. China
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Chen FQ. [Allergy and chronic rhinosinusitis]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:18-22. [PMID: 29774678 DOI: 10.13201/j.issn.1001-1781.2017.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Indexed: 06/08/2023]
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Xue T, Wei L, Zha DJ, Qiu JH, Chen FQ, Qiao L, Qiu Y. miR-29b overexpression induces cochlear hair cell apoptosis through the regulation of SIRT1/PGC-1α signaling: Implications for age-related hearing loss. Int J Mol Med 2016; 38:1387-1394. [PMID: 27635430 PMCID: PMC5065299 DOI: 10.3892/ijmm.2016.2735] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 08/25/2016] [Indexed: 01/01/2023] Open
Abstract
It has been reported that the degeneration of cochlear hair cells is the typical cause of presbycusis (or age-related hearing loss). However, the molecular mechanisms that mediate cochlear hair cell apoptosis are not yet fully understood and there is no effective treatment for this disorder. MicroRNAs (miRNAs or miRs) have been increasingly shown to be associated with age-related diseases and are emerging as promising therapeutic targets. In this study, we investigated whether miR-29b is involved in the degeneration of cochlear hair cells. To examine our hypothesis, nuclear staining and terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) were used to quantify the hair cell counts. RT-qPCR and western blot analysis were used to examine miR-29b/sirtuin 1 (SIRT1)/proliferator-activated receptor-gamma coactivator 1α (PGC-1α) signaling in cochlear hair cells. We found that there was a significant degeneration of cochlear hair cells and a higher expression of miR-29b in aged C57BL/6 mice compared with young mice. There was also an age-related decrease in the expression of SIRT1 and PGC-1α. In the inner ear cell line, HEI-OC1, miR-29b overexpression (by transfection with miR-29b mimic) inhibited SIRT1 and PGC-1α expression, leading to an increase in mitochondrial dysfunction and apoptosis. Moreover, the inhibition of miR-29b (by transfection with miR-29b inhibitor) increased SIRT1 and PGC-1α expression, while it decreased apoptosis. Taken together, our findings support a link between age-related cochlear hair cell apoptosis and miR-29b/SIRT1/PGC-1α signaling, which may present an attractive pharmacological target for the development of novel drugs for the treatment of age-related hearing loss.
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Affiliation(s)
- Tao Xue
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Li Wei
- Department of Obstetrics and Gynecology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Ding-Jun Zha
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Jian-Hua Qiu
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Fu-Quan Chen
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Li Qiao
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
| | - Yang Qiu
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710003, P.R. China
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Chen FQ, Yang YZ, Yu LL, Bi CB. Prevalence of Mycoplasma pneumoniae: a cause for community-acquired infection among pediatric populaztion. Niger J Clin Pract 2015; 18:354-8. [PMID: 25772918 DOI: 10.4103/1119-3077.153247] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Atypical pneumonia caused by Mycoplasma pneumoniae is a leading cause of mortality among the pediatric age group. OBJECTIVES Our study was designed to know the prevalence of M. pneumoniae in children with community-acquired pneumonia and the involvement in the cytoadherence to the respiratory epithelium by M. pneumoniae using electron microscopy and immuno-gold labeling technique. MATERIALS AND METHODS A total of 152 children of 1 month to 12 years of age of both sexes attending Hebei Provincial People's Hospital, Shijiazhuang, Hebei with diagnosed pneumonia were included in the study. RESULTS Out of 152 children 84 (55.3%) were males, and 68 (44.7%) were females. The mean age of the patients in the control group (50 patients) was 18.5 ± 3 months with 31 (62%) males and 19 (38%) females. IgM antibodies against M. pneumoniae were positive in 84 (55.3%) males and 68 (44.7%) females. Out of 50 patients 9 (18%) were found to positive for IgM M. pneumoniae antibodies of which four (44.4%) males and 5 (55.5%) females were positive. Our study observed that the gold particles were clustered on the filamentous extension of the tip of the cells. Out of 152 serum samples subjected to particle agglutination assay 138 (90.7%) were positive 1:320 titer, 9 were >1:80 and 3 showed titer was >1:40. CONCLUSION We suggest that clinicians should consider empirical therapy of broad spectrum antibiotics therapy to cover these atypical pathogens to reduce the severity before obtaining the serological results. From our study, we also suggest electron microscopic and biochemical studies for better diagnosis of these pathogens.
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Affiliation(s)
- F Q Chen
- Department of Pediatrics, Hebei Provincial People's Hospital, Shijiazhuang, Hebei 050051, China
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22
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Ding ZJ, Chen X, Tang XX, Wang X, Song YL, Chen XD, Wang J, Wang RF, Mi WJ, Chen FQ, Qiu JH. Apoptosis-inducing factor and calpain upregulation in glutamate-induced injury of rat spiral ganglion neurons. Mol Med Rep 2015; 12:1685-92. [PMID: 25891494 PMCID: PMC4464299 DOI: 10.3892/mmr.2015.3626] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 02/27/2015] [Indexed: 01/08/2023] Open
Abstract
Spiral ganglion neuron (SGN) damage and apoptosis can lead to noise-induced hearing loss, age-associated hearing loss and, in certain cases, auditory neuropathy. The apoptosis-inducing factor (AIF)-associated pathway may be important in this process. The present study aimed to investigate the expression levels of AIF and calpain in damaged SGNs. Glutamate (Glu) perfusion and cell culture in different concentrations of Glu were performed to damage the SGNs of Sprague-Dawley (SD) rats, with saline water used as a control Different concentrations (5, 10, 20 and 40 mM) of Glu were injected into the cochlear tympanic canal of 18 SD rats, and 10, 20 and 40 mM Glu were added to SGN cultures. Auditory brainstem responses (ABR) were measured prior to and 2 days following the injection of Glu. Immunofluorescent staining was used to detect the SGN damage and the expression levels of AIF and calpain in vivo and in in vitro. Transmission electron microscopy (TEM) was used to measure cell apoptosis and reverse transcription-quantitative polymerase chain reaction was used to analyse the gene expression levels of AIF and calpain in the damaged SGNs. The TEM identified mitochondrial vacuolisation, swelling of the SGN and hetero-chromatin formation. Injection of Glu reduced the number of SGNs and induced apoptosis. AIF was observed to translocate into the nuclei of the SGNs in the 20 and 40 mM Glu groups, and the expression levels of AIF and calpain were markedly upregulated in the modiolus of the Glu-damaged SGNs. The upregulation of AIF and calpain may be important in the process of SGN damage and apoptosis.
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Affiliation(s)
- Zhong-Jia Ding
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Xin Chen
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Xiao-Xu Tang
- Outpatient Department, Logistics Academy, Beijing 100858, P.R. China
| | - Xi Wang
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Yong-Li Song
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Xiao-Dong Chen
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Jian Wang
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Ren-Feng Wang
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Wen-Juan Mi
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Fu-Quan Chen
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Jian-Hua Qiu
- Department of Otolaryngology‑Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
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Li ZJ, Fan DY, Chen FQ, Yuan QY, Chow WS, Xie ZQ. Physiological integration enhanced the tolerance of Cynodon dactylon to flooding. Plant Biol (Stuttg) 2015; 17:459-465. [PMID: 25557716 DOI: 10.1111/plb.12254] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 09/01/2014] [Indexed: 06/04/2023]
Abstract
Many flooding-tolerant species are clonal plants; however, the effects of physiological integration on plant responses to flooding have received limited attention. We hypothesise that flooding can trigger changes in metabolism of carbohydrates and ROS (reactive oxygen species) in clonal plants, and that physiological integration can ameliorate the adverse effects of stress, subsequently restoring the growth of flooded ramets. In the present study, we conducted a factorial experiment combining flooding to apical ramets and stolon severing (preventing physiological integration) between apical and basal ramets of Cynodon dactylon, which is a stoloniferous perennial grass with considerable flooding tolerance. Flooding-induced responses including decreased root biomass, accumulation of soluble sugar and starch, as well as increased activity of superoxide dismutase (SOD) and ascorbate peroxidase (APX) in apical ramets. Physiological integration relieved growth inhibition, carbohydrate accumulation and induction of antioxidant enzyme activity in stressed ramets, as expected, without any observable cost in unstressed ramets. We speculate that relief of flooding stress in clonal plants may rely on oxidising power and electron acceptors transferred between ramets through physiological integration.
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Affiliation(s)
- Z J Li
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China
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Xue T, Wei L, Zha DJ, Qiao L, Lu LJ, Chen FQ, Qiu JH. Exposure to acoustic stimuli promotes the development and differentiation of neural stem cells from the cochlear nuclei through the clusterin pathway. Int J Mol Med 2015; 35:637-44. [PMID: 25605314 PMCID: PMC4314421 DOI: 10.3892/ijmm.2015.2075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 01/14/2015] [Indexed: 01/23/2023] Open
Abstract
Stem cell therapy has attracted widespread attention for a number of diseases. Recently, neural stem cells (NSCs) from the cochlear nuclei have been identified, indicating a potential direction for the treatment of sensorineural hearing loss. Acoustic stimuli play an important role in the development of the auditory system. In this study, we aimed to determine whether acoustic stimuli induce NSC development and differentiation through the upregulation of clusterin (CLU) in NSCs isolated from the cochlear nuclei. To further clarify the underlying mechanisms involved in the development and differentiation of NSCs exposed to acoustic stimuli, we successfully constructed animal models in which was CLU silenced by an intraperitoneal injection of shRNA targeting CLI. As expected, the NSCs from rats treated with LV-CLU shRNA exhibited a lower proliferation ratio when exposed to an augmented acoustic environment (AAE). Furthermore, the inhibition of cell apoptosis induced by exposure to AAE was abrogated after silencing the expression of the CLU gene. During the differentiation of acoustic stimuli-exposed stem cells into neurons, the number of astrocytes was significantly reduced, as evidenced by the expression of the cell markers, microtubule associated protein-2 (MAP-2) and glial fibrillary acidic protein (GFAP), which was markedly inhibited when the CLU gene was silenced. Our results indicate that acoustic stimuli may induce the development and differentiation of NSCs from the cochlear nucleus mainly through the CLU pathway. Our study suggests that CLU may be a novel target for the treatment of sensorineural hearing loss.
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Affiliation(s)
- Tao Xue
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Li Wei
- Department of Obstetrics and Gynecology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Ding-Jun Zha
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Li Qiao
- Department of Obstetrics and Gynecology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Lian-Jun Lu
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Fu-Quan Chen
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Jian-Hua Qiu
- Department of Otolaryngology, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
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25
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Chen FQ, Wang QY, Wei GZ, Ma XY, Ma DW, Deng WW, Sun WB. Effects of mycophenolate mofetil on the expression of monocyte chemoattractant protein-1 and fibronectin in high glucose cultured human mesangial cells. Genet Mol Res 2014; 13:3154-61. [PMID: 24782172 DOI: 10.4238/2014.april.17.11] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The effects of high glucose on the expression of monocyte chemoattractant protein-1 (MCP-1) and the main component of the extracellular matrix, fibronectin (FN), were explored in human mesangial cells (HMCs), along with the intervention effects of mycophenolate mofetil (MMF) on these indicators. Cultured HMCs were divided into five groups: 1) normal control group (5 mM glucose); 2) high glucose group (30 mM glucose); 3) mannitol osmotic pressure control group (5 mM glucose + 25 mM mannitol); 4) high glucose + MMF-10 group (30 mM glucose + 10 μg/mL MMF); 5) high glucose + MMF-100 group (30 mM glucose + 100 μg/mL MMF). At 24, 48, and 72 h, reverse transcription-polymerase chain reaction and enzyme-linked immunosorbent assay methods were used to detect the effects of MMF on MCP-1 mRNA and protein and FN expression in HMCs under high glucose conditions. MCP-1 mRNA and protein expressions and FN secretion significantly increased in HMCs of the high glucose group compared with the normal control group (P < 0.01), with the highest expression observed at 48 h. MMF could reduce the MCP-1 mRNA and protein and FN expression levels (P < 0.01), and the inhibition occurred in a dose- and time-dependent manner (P < 0.05). In conclusion, MMF could inhibit MCP-1 expression and the secretion of FN, indicating that it may delay the progression of glomerulosclerosis and interstitial fibrosis in diabetic nephropathy to ultimately achieve protective effects on the kidney.
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Affiliation(s)
- F Q Chen
- Department of Geriatrics, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Q Y Wang
- Department of Endocrinology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - G Z Wei
- Department of Radiology, Orthopedic Hospital of Shenyang, Shenyang, China
| | - X Y Ma
- Department of Geriatrics, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - D W Ma
- Department of Endocrinology, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - W W Deng
- Department of Geriatrics, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - W B Sun
- Department of Endocrinology, The First Affiliated Hospital of China Medical University, Shenyang, China
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Zhao YQ, Chen FQ, Wu ZH, Feng YH, Qu JP. Morphology, mechanical, and rheological properties of poly(lactic acid)/ethylene acrylic acid copolymer blends processing via vane extruder. J Appl Polym Sci 2013. [DOI: 10.1002/app.40146] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yong-Qing Zhao
- National Engineering Research Center of Novel Equipment for Polymer Processing; South China University of Technology; Guangzhou 510640 Guangdong People's Republic of China
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education; South China University of Technology; Guangzhou 510640 Guangdong People's Republic of China
| | - Fu-Quan Chen
- National Engineering Research Center of Novel Equipment for Polymer Processing; South China University of Technology; Guangzhou 510640 Guangdong People's Republic of China
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education; South China University of Technology; Guangzhou 510640 Guangdong People's Republic of China
| | - Zheng-Huan Wu
- National Engineering Research Center of Novel Equipment for Polymer Processing; South China University of Technology; Guangzhou 510640 Guangdong People's Republic of China
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education; South China University of Technology; Guangzhou 510640 Guangdong People's Republic of China
| | - Yan-Hong Feng
- National Engineering Research Center of Novel Equipment for Polymer Processing; South China University of Technology; Guangzhou 510640 Guangdong People's Republic of China
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education; South China University of Technology; Guangzhou 510640 Guangdong People's Republic of China
| | - Jin-Ping Qu
- National Engineering Research Center of Novel Equipment for Polymer Processing; South China University of Technology; Guangzhou 510640 Guangdong People's Republic of China
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education; South China University of Technology; Guangzhou 510640 Guangdong People's Republic of China
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Abstract
Trans-tympanic injection into the middle ear has long been the standard for local delivery of compounds in experimental studies. Here we demonstrate the advantages of the novel method of intra-tympanic injection through the otic bone for the delivery of compounds or siRNA into the adult mouse cochlea. First, a fluorescently-conjugated scrambled siRNA probe was applied via intra-tympanic injection into the middle ear cavity and was detected in sensory hair cells and nerve fibers as early as 6 h after the injection. The fluorescent probe was also detected in other cells of the organ of Corti, the lateral wall, and in spiral ganglion cells 48 h after the injection. Furthermore, intra-tympanic delivery of Nox3 siRNA successfully reduced immunofluorescence associated with Nox3 in outer hair cells 72 h after injection by 20%. Drug or siRNA delivery via intra-tympanic injection does not compromise the tympanic membrane or interfere with noise-induced hearing loss, while trans-tympanic injections significantly altered the cochlear response to noise exposure. In summary, intra-tympanic injection through the otic bone into the middle ear cavity provides a promising approach for delivery of compounds or siRNA to cochlear hair cells of adult mice, relevant for the study of mechanisms underlying inner ear insults and, specifically, noise-induced hearing loss.
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Affiliation(s)
- Naoki Oishi
- Kresge Hearing Research Institute, Department of Otolaryngology, University of Michigan, Ann Arbor, MI 48109-5616, USA
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Chen FQ, Hill K, Guan YJ, Schacht J, Sha SH. Activation of apoptotic pathways in the absence of cell death in an inner-ear immortomouse cell line. Hear Res 2011; 284:33-41. [PMID: 22240458 DOI: 10.1016/j.heares.2011.12.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Revised: 12/17/2011] [Accepted: 12/19/2011] [Indexed: 01/21/2023]
Abstract
Aminoglycoside antibiotics and cisplatin (CDDP) are the major ototoxins of clinical medicine due to their capacity to cause significant and permanent hearing loss by targeting the mammalian sensory cells. Understanding the pathogenesis of damage is the first step in designing effective prevention of drug-induced hearing loss. In-vitro systems greatly enhance the efficiency of biochemical and molecular investigations through ease of access and manipulation. HEI-OC1, an inner ear cell line derived from the immortomouse, expresses markers for auditory sensory cells and, therefore, is a potential tool to study the ototoxic mechanisms of drugs like aminoglycoside antibiotics and CDDP. HEI-OC1 cells (and also HeLa cells) efficiently take up fluorescently tagged gentamicin and respond to drug treatment with changes in cell death and survival signaling pathways. Within hours, the c-Jun N-terminal kinase pathway and the transcription factor AP-1 were activated and at later times, the "executioner caspase", caspase-3. These responses were robust and elicited by both gentamicin and kanamycin. However, despite the initiation of apoptotic pathways and transient changes in nuclear morphology, cell death was not observed following aminoglycoside treatment, while administration of CDDP led to significant cell death as determined by flow cytometric measurements; β-galactosidase analysis ruled out senescence in gentamicin-treated cells. The ability to withstand treatment with aminoglycosides but not with CDDP suggests that this cell line might be helpful in providing some insight into the differential actions of the two ototoxic drugs.
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Affiliation(s)
- Fu-Quan Chen
- Department of Pathology and Laboratory Medicine, College of Medicine, Medical University of South Carolina, 39 Sabin Street, Charleston, SC 29425, USA
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29
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Abstract
We have previously demonstrated that oxidative stress increases in the inner ear of aging CBA/J mice and might contribute to the loss of function of the sensory system. We now investigate the activation of cell death pathways in the cochleae of these animals. Middle-aged (12 months) and old (18-26 months) mice with hearing deficits displayed outer hair cell nuclei with apoptotic and, to a lesser extent, necrotic features. Both intrinsic and extrinsic cell death pathways were activated by translocation or post-translational modification of proteins in the aging cochlea as compared to young (3 months) animals. Cytosolic cytochrome c increased, formed a complex with, and activated caspase 9. Endonuclease G translocated to the nuclei of aging outer hair cells suggesting its function as an apoptotic DNase. The cleaved (and hence active) forms of calpain I and calpain II increased while active cathepsin D was transiently elevated in middle-aged but not old animals. Finally, increases in the phosphorylation of p38 MAPK and JNK implicated the additional involvement of the MAPK pathway. The results suggest that multiple cell death pathways, all potentially linked to oxidative stress, are activated in hair cells of the auditory organ in aging mice.
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Affiliation(s)
- Su-Hua Sha
- Kresge Hearing Research Institute, Department of Otolaryngology, University of Michigan, Ann Arbor, MI 48109, USA.
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30
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Abstract
Post-translational modification of histones is an important form of chromatin regulation impacting transcriptional activation. Histone acetyltransferases, for example, acetylate lysine residues on histone tails thereby enhancing gene transcription, while histone deacetylases (HDACs) remove those acetyl groups and repress gene transcription. Deficient histone acetylation is associated with pathologies, and histone deacetylase inhibitors have been studied in the treatment of cancer and neurodegenerative diseases. Here we explore histone acetylation in cochlear sensory cells following a challenge with gentamicin, an aminoglycoside antibiotic known to cause loss of auditory hair cells and hearing. The addition of the drug to organotypic cultures of the mouse organ of Corti decreased the acetylation of histone core proteins (H2A Ack5, H2B Ack12, H3 Ack9, and H4 Ack8) followed by a loss of sensory cells. Protein levels of HDAC1, HDAC3 and HDAC4 were increased while the histone acetyltransferases such as CREB-binding protein and p300 remained unchanged. We next hypothesized that protecting histone acetylation should prevent cell death and tested the effects of HDAC-inhibitors on the actions of gentamicin. Co-treatment with trichostatin A maintained near-normal levels of acetylation of histone core proteins in cochlear hair cells and attenuated gentamicin-induced cell death. The addition of sodium butyrate also rescued hair cells from damage by gentamicin. The results are consistent with an involvement of deficient histone acetylation in aminoglycoside-induced hair cell death and point to the potential value of HDAC-inhibitors in protection from the side effects of these drugs.
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Affiliation(s)
- Fu-Quan Chen
- Kresge Hearing Research Institute, Department of Otolaryngology, University of Michigan, Ann Arbor, USA
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31
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Zeng XY, Turkstra JA, Tsigos A, Meloen RH, Liu XY, Chen FQ, Schaaper WMM, Oonk HB, Guo DZ, van de Wiel DFM. Effects of active immunization against GnRH on serum LH, inhibin A, sexual development and growth rate in Chinese female pigs. Theriogenology 2002; 58:1315-26. [PMID: 12387345 DOI: 10.1016/s0093-691x(02)01036-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Surgical castration of young female pigs is common practice in Chinese pig farming today. The purpose of the present study is to investigate anti-GnRH immunization as a practical alternative to surgical castration for female pigs. Thirty-six Chinese female crossbred pigs (Chinese Yanan x Yorkshire) were selected from 12 litters, three pigs from each litter, at the age of 10-13 weeks. One pig from each litter was immunized with 62.5 microg D-Lys6-GnRH-tandem-dimer peptide conjugated to ovalbumin in Specol adjuvant at Week 0 (0 week post-vaccination, wpv), and a booster vaccination was given 8 weeks later (8 wpv). Its intact and castrate littermates (surgically castrated at the time of weaning, i.e. at 6 weeks of age) were administered the vehicle and served as controls. Antibody titers, serum LH and inhibin A were determined at the day of first vaccination, every 4 weeks thereafter and at the day of slaughter (18 wpv). At slaughter, ovaries were inspected for the presence of follicles and corpora lutea, and ovarian and uterine weights were recorded. Ten of twelve immunized pigs responded well to the immunization (immunocastrated animals), while the remaining two pigs responded poorly (nonresponders). Antibody titres in immunocastrated animals steadily increased after immunization, became maximal at 12 wpv and remained high until slaughter. Serum LH levels were reduced (P < 0.05) in immunocastrated pigs as compared to intact controls and surgical castrates. Serum inhibin A levels decreased after vaccination, and equaled surgical castrate levels from 8 wpv until the end of the experiment. Ovarian and uterine weights (1.3 +/- 0.2 and 43.9 +/- 11.4 g, respectively; mean +/- S.E.M.) were significantly lower (P < 0.05) in immunocastrates than in intact controls (9.4 +/- 1.1 and 390.9 +/- 67.2 g, respectively). Antibody titers were significantly lower (P < 0.05) in nonresponders than in immunocastrated pigs from 12 wpv to slaughter. Ovarian and uterine weights were similar in nonresponders and in intact controls. Macroscopically, no follicular structures were found in ovaries of immunocastrated pigs, while large follicles or corpora lutea were observed in the ovaries of both nonresponders and intact controls. Although not significant, immunocastrates had a numerically higher average daily gain than surgical castrates and intact controls (0.74 +/- 0.04 versus 0.66 +/- 0.04 versus 0.66 +/- 0.03 kg per day, respectively; mean +/- S.E.M., P = 0.09). Results obtained in the present study demonstrate that anti-GnRH immunization can be an attractive alternative to surgical castration for Chinese crossbred female pigs. Our results also question the beneficial effect of surgical castration on growth as compared to intact controls.
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Affiliation(s)
- X Y Zeng
- Isotope Research Lab, Sichuan Agricultural University, Ya'an, PR China
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32
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Zeng XY, Turkstra JA, van de Wiel DF, Guo DZ, Liu XY, Meloen RH, Schaaper WM, Chen FQ, Oonk HB, Zhang X. Active immunization against gonadotrophin-releasing hormone in Chinese male pigs. Reprod Domest Anim 2001; 36:101-5. [PMID: 11328563 DOI: 10.1046/j.1439-0531.2001.00256.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We have investigated, under the normal conditions of local Chinese pig farming, castration of young male pigs by vaccination with a newly developed vaccine against gonadotrophin releasing hormone (GnRH). Because of the very early onset of puberty, long fattening period and relatively harsh circumstances in Chinese pig production, an investigation of the endocrine response of Chinese breeds to this type of vaccination was of particular interest. Fifteen crossbred boars (Yorkshire x Yanan) from three different litters were randomly assigned to three groups of five animals each. The first group was immunized at 13 weeks of age with a GnRH tandem dimer OVA-conjugate in Specol and received a booster immunization 8 weeks later. The second group was injected with Specol alone and served as untreated controls. The remaining group was surgically castrated at the time of weaning (at 6 weeks of age). Pigs were fed ad libitum from weaning onwards. All animals were slaughtered at 31 weeks of age. Immunized boars had undetectable or low serum testosterone (0.09 +/- 0.12 ng/ml), low fat androstenone (0.05 +/- 0.01 microg/g) levels and very low testes weights (19.1 +/- 4.3 g). Intact controls had much higher serum levels of testosterone (9.76 +/- 4.81 ng/ml), fat androstenone levels (2.26 +/- 0.87 microg/g) and testes weights (114.3 +/- 29.41 g) at slaughter. Both the immunized and castrated group grew significantly faster than intact boars (p < 0.01). Average daily gains in immunized, castrated and intact animals were 0.69 +/- 0.08, 0.63 +/- 0.05 and 0.42 +/- 0.07 kg (mean +/- SD), respectively. The present data demonstrate for the first time that the newly developed anti-GnRH vaccine works very well under practical Chinese pig farming conditions, and can be an attractive alternative to surgical castration.
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Affiliation(s)
- X Y Zeng
- Isotope Research Lab, Sichuan Agricultural University, Ya'an, P.R. China
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33
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Chen FQ, Huang WG, Qiao L, Jiang HY. [The expression of transforming growth factor alpha and its receptor in nasal polyps]. Lin Chuang Er Bi Yan Hou Ke Za Zhi 2000; 14:483-4. [PMID: 12563935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To assess the possible role of expression of TGF alpha and EGFR in nasal polyps and its relationship with PCNA labeling index. METHOD Specimens from 20 patients of nasal polyps were studied with immunohistochemical technique. RESULT The expression of TGF alpha, EGFR and PCNA were increased in the epithelium, gland cells and inflammatory cells of nasal polyps. There was a close correlation between the intensities of TGF alpha, EGFR and PCNA. CONCLUSION TGF alpha may play a key role in epithelial cell proliferation in nasal polyps.
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Affiliation(s)
- F Q Chen
- Department of Otolaryngology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032
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34
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Chen FQ, Qiao L, Huang H, Huang WG. [Vasomotor rhinitis following endoscopic sinus surgery: 5 cases report]. Lin Chuang Er Bi Yan Hou Ke Za Zhi 2000; 14:112-3. [PMID: 12541410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To investigate the possibility of endoscopic sinus surgery causing vasomotor rhinitis. METHOD A retrospective study of 300 patients who received endoscopic sinus surgery. 5 cases out of 300 suffered from vasomotor rhinitis 1-3 weeks following endoscopic sinus surgery. Radio frequency cautery of agger nasi mucous was applied to all 5 patients. RESULT After 4-6 months of follow-up, 4 cases out of 5 with vasomotor rhinitis were effective and 1 improved. CONCLUSION Endoscopic sinus surgery may be causative factor for vasomotor rhinitis.
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Affiliation(s)
- F Q Chen
- Department of Otorhinolaryngology, Xijing Hospital, the Forth Military Medical University, Xi'an 710032
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35
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Chen FQ, Foolad MR. A molecular linkage map of tomato based on a cross between Lycopersicon esculentum andL. pimpinellifolium and its comparison with other molecular maps of tomato. Genome 1999. [DOI: 10.1139/g98-103] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The wild species related to the cultivated tomato, Lycopersicon esculentum Mill., are a rich source of useful genes for germplasm improvement and varietal development. Characterization and utilization of exotic germplasm can be accelerated by the use of molecular linkage maps. Recently, we have identified an accession (LA722) within L. pimpinellifolium Jusl., a closely-related, red-fruited wild species of tomato, which exhibits a number of desirable agricultural characteristics including salt tolerance, disease resistance, and high fruit quality. The limited DNA marker polymorphism between L. esculentum and L. pimpinellifolium, however, restricts the use of the high-density molecular map of tomato, which was previously constructed based on a cross between L. esculentum and L. pennellii Corr., for marker-assisted identification and utilization of useful genes in LA722. To overcome this problem, we have constructed a linkage map based on restriction fragment length polymorphisms (RFLPs) which were identified between LA722 and a fresh-market tomato breeding line (NC84173). The mapping population (consisting of 119 BC1 individuals) was genotyped for 151 RFLP markers, including 17 germination related and 2 potassium transporter cDNAs. The DNA markers spanned approximately 1192 cM of the tomato genome with an average distance of 7.9 cM between markers. The length of the map and the linear order of the markers were in good agreement with those of the previously published molecular maps of tomato, however, there were considerable differences in the distribution of recombinations along the chromosomes. Comparison of all seven published molecular maps of tomato, which were constructed based on different inter- and intraspecific crosses, indicated that some chromosomal regions were more stable than others in terms of the frequency of recombinations. Similarities and differences among tomato molecular maps are discussed in relation to phylogenetic relationships between parents of the mapping populations. In comparison, a L. esculentum ×L. pimpinellifolium map should be more useful than other interspecific maps for marker-assisted exploitation of genetic variation that exists within L. pimpinellifolium or L. esculentum; the latter is because of the extensive introgression of genes from L. pimpinellifolium into L. esculentum, which occurred over time by natural means or through plant breeding.Key words: Lycopersicon esculentum, L. pimpinellifolium, genetic marker, molecular map, recombination, restriction fragment length polymorphism (RFLP), tomato.
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36
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Foolad MR, Chen FQ. RAPD markers associated with salt tolerance in an interspecific cross of tomato (Lycopersicon esculentum×L. pennellii). Plant Cell Rep 1998; 17:306-312. [PMID: 30736612 DOI: 10.1007/s002990050398] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This study was conducted to identify randomly amplified polymorphic DNA (RAPD) markers associated with quantitative trait loci (QTLs) conferring salt tolerance during germination in tomato. Germination response of an F2 population (2000 individuals) of a cross between UCT5 (Lycopersicon esculentum, salt-sensitive) and LA716 (L. pennellii, salt-tolerant) was evaluated at a salt-stress level of 175 mM NaCl+17.5 mM CaCl2 (water potential ca. -9.5 bars). Germination was scored visually as radicle protrusion at 6-h intervals for 30 consecutive days. Individuals at both extremes of the response distribution (i.e., salt-tolerants and salt-sensitives) were selected. The selected individuals were genotyped for 53 RAPD markers and allele frequencies at each marker locus were determined. The linkage association among the markers was determined using a "MAPMAKER" program. Trait-based marker analysis (TBA) identified 13 RAPD markers at eight genomic regions that were associated with QTLs affecting salt tolerance during germination in tomato. Of these genomic regions, five included favorable QTL alleles from LA716, and three included favorable alleles from UCT5. The approximate effects of individual QTLs ranged from 0.46 to 0.82 phenotypic standard deviation. The results support our previous suggestion that salt tolerance during germination in tomato is polygenically controlled. The identification of favorable QTLs in both parents suggests the likelihood of recovering transgressive segregants in progeny derived from these genotypes. Results from this study are discussed in relation to using marker-assisted selection in breeding for salt tolerance.
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Affiliation(s)
- M R Foolad
- Department of Horticulture, The Pennsylvania State University, 103 Tyson Building, University Park, PA 16802, USA, , , , , , US
| | - F Q Chen
- Department of Horticulture, The Pennsylvania State University, 103 Tyson Building, University Park, PA 16802, USA, , , , , , US
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37
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Chen FQ, Okamura K, Sato K, Kuroda T, Mizokami T, Fujikawa M, Tsuji H, Okamura S, Fujishima M. Reversible primary hypothyroidism with blocking or stimulating type TSH binding inhibitor immunoglobulin following recombinant interferon-alpha therapy in patients with pre-existing thyroid disorders. Clin Endocrinol (Oxf) 1996; 45:207-14. [PMID: 8881454 DOI: 10.1046/j.1365-2265.1996.d01-1564.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Treatment with recombinant interferon-alpha (rIFN-alpha) may induce autoimmunity. We have evaluated the effect of rIFN-alpha on pre-existing thyroid disease with special reference to changes in TSH receptor antibody. DESIGN AND PATIENTS Five patients, who had a history of autoimmune thyroid disease diagnosed between 2 and 16 years earlier (three patients had Graves' disease while two had Hashimoto's thyroiditis), were treated with rIFN-alpha for chronic hepatitis C. Before, during and after rIFN-alpha therapy, we determined thyroid function, antithyroid antibody, thyroid echogenicity and the surface phenotype of the peripheral and intrathyroidal lymphocytes. RESULTS Four of the patients developed overt hypothyroidism after 4-7 months of rIFN-alpha therapy, and two of them had a preceding history of low-uptake thyrotoxicosis. Recovery of thyroid function was observed in all four patients. Strongly positive blocking type TSH receptor antibody was detected and an increase in the percentage of CD19 positive cells in the intrathyroidal lymphocytes was also observed in three of the patients even though the goitre size increased in two of them. One of the patients became thyrotoxic later when stimulating type TSH receptor antibody became positive. Another patient suffered from reversible hypothyroidism although stimulating type TSH receptor antibody remained strongly positive throughout the clinical course. CONCLUSIONS Our data thus indicated a high incidence of an unusual type of reversible hypothyroidism with TSH receptor antibodies in patients with chronic hepatitis C and pre-existing autoimmune thyroid disease after recombinant interferon-alpha therapy through a mechanism involving both the humoral and cellular immune systems.
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Affiliation(s)
- F Q Chen
- Second Department of Internal Medicine, Kyushu University, Fukuoka, Japan
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38
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Chen FQ, Prehn D, Hayes PM, Mulrooney D, Corey A, Vivar H. Mapping genes for resistance to barley stripe rust (Puccinia striiformis f. sp. hordei). Theor Appl Genet 1994; 88:215-9. [PMID: 24185929 DOI: 10.1007/bf00225900] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/1993] [Accepted: 08/11/1993] [Indexed: 05/09/2023]
Abstract
Two genes conferring resistance to the barley stripe rust found in Mexico and South America, previously identified as race 24, were mapped to the M arms of barley chromosomes 7 and 4 in a doubled haploid population using molecular markers and the quantitative trait loci (QTL) mapping approach. The resistance gene on chromosome 7 had a major effect, accounting for 57% of the variation in disease severity. The resistance gene on chromosome 4 had a minor effect, accounting for 10% of the variation in trait expression. Two pairs of restriction fragment length polymorphism markers are being used to introgress the resistance genes to North American spring barley using molecular marker-assisted backcrossing.
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Affiliation(s)
- F Q Chen
- Department of Crop and Soil Science, Oregon State University, 97331-3002, Corvallis, OR, USA
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39
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Kleinhofs A, Kilian A, Saghai Maroof MA, Biyashev RM, Hayes P, Chen FQ, Lapitan N, Fenwick A, Blake TK, Kanazin V, Ananiev E, Dahleen L, Kudrna D, Bollinger J, Knapp SJ, Liu B, Sorrells M, Heun M, Franckowiak JD, Hoffman D, Skadsen R, Steffenson BJ. A molecular, isozyme and morphological map of the barley (Hordeum vulgare) genome. Theor Appl Genet 1993; 86:705-12. [PMID: 24193780 DOI: 10.1007/bf00222660] [Citation(s) in RCA: 194] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/1992] [Accepted: 12/09/1992] [Indexed: 05/04/2023]
Abstract
A map of the barley genome consisting of 295 loci was constructed. These loci include 152 cDNA restriction fragment length polymorphism (RFLP), 114 genomic DNA RFLP, 14 random amplified polymorphic DNA (RAPD), five isozyme, two morphological, one disease resistance and seven specific amplicon polymorphism (SAP) markers. The RFLP-identified loci include 63 that were detected using cloned known function genes as probes. The map covers 1,250 centiMorgans (cM) with a 4.2 cM average distance between markers. The genetic lengths of the chromosomes range from 124 to 223 cM and are in approximate agreement with their physical lengths. The centromeres were localized to within a few markers on all of the barley chromosomes except chromosome 5. Telomeric regions were mapped for the short (plus) arms of chromosomes 1, 2 and 3 and the long (minus) arm of chromosomes 7.
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Affiliation(s)
- A Kleinhofs
- Department of Crop and Soil Sciences, Washington State University, 99164-6420, Pullman, WA, USA
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40
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Gao XS, Chen FQ, Liu LX, Li JR, Li N, Wang XH, Niu HZ, Wu ZL, Zhu J. [18 incompatible medicaments that impair treatment]. Zhongguo Zhong Yao Za Zhi 1992; 17:754-6, 761. [PMID: 1304760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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41
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Chen FQ. [Study on the transperitoneal sterilization of the fallopian tube with silicon rubber plug and its reversibility]. Shengzhi Yu Biyun 1989; 9:51-4. [PMID: 12342677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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42
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Chen FQ, Hayes PM. A comparison of Hordeum bulbosum-mediated haploid production efficiency in barley using in vitro floret and tiller culture. Theor Appl Genet 1989; 77:701-704. [PMID: 24232804 DOI: 10.1007/bf00261247] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/1988] [Accepted: 12/22/1988] [Indexed: 06/02/2023]
Abstract
A high efficiency of Hordeum bulbosum-mediated haploid production in barley has been achieved using a floret culture technique in which florets pollinated with Hordeum bulbosum are cultured on modified N6 media containing 0.5 mg/l kinetin and 1.2 mg/l2,4-D. Cultures were maintained at 25 °C with a 16 h photoperiod for 9 days before embryo rescue. In a comparison of haploid production efficiency using five F1 hybrids from winter x winter and winter x spring barley crosses, 41.6 haploid plants/100 florets pollinated were produced using floret culture. Using detached tiller culture, 13.5 haploid plants/100 florets pollinated were produced. Higher efficiencies achieved with floret culture are attributed to the formation of larger, differentiated embryos. Such embryos lead to higher frequencies of plant regeneration. The F1 from a winter x winter cross was inferior in haploid production compared to F1s from winter x spring crosses. No genotype x technique interaction was observed.
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Affiliation(s)
- F Q Chen
- Department of Crop Science, Oregon State University, 97331, Corvallis, OR, USA
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