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Wang MH, Hu ZX, Feng LZ, Yu HJ, Yang J. [Epidemic trends and prevention and control of seasonal influenza in China after the COVID-19 pandemic]. Zhonghua Yi Xue Za Zhi 2024; 104:559-565. [PMID: 38389234 DOI: 10.3760/cma.j.cn112137-20231220-01430] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
During the COVID-19 pandemic, a series of non-pharmaceutical interventions, which were implemented to curb the spread of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), significantly modified the seasonal pattern of influenza. The intensity of influenza activity markedly decreased and B/Yamagata lineage was no longer detected. As the national influenza sentinel surveillance data shown, clear seasonal patterns were observed for influenza between 2012-2019, annually with an average of 14.57% of specimens tested positive for influenza virus. However, the seasonal pattern of influenza was disrupted after the outbreak of COVID-19. In the 2020-2021 season, influenza demonstrated an extremely low activity (yearly positivity rate<1.0%), followed by a resurgence of winter peak in the 2021-2022 season. Following the downgrade of management of COVID-19 to Class B in China in December 26, 2022, social activities gradually resumed, leading to the rebound of influenza activity with an out-of-season ciculation. After COVID-19 pademic, other respiratory infectious diseases caused by SARS-CoV-2, respiratory syncytial virus, and mycoplasma pneumonia were alternatively or concurrently circulated with influenza. The prevention and control of influenza and other respiratory infectious diseases emphasizes a multi-disease prevention strategy, including long-term and continuous monitoring the epidemic trends in influenza virus and SARS-CoV-2, promoting influenza and COVID-19 vaccination among key populations, and strengthening the knowledge and public awareness of prevention and control for respiratory infectious diseases, etc.
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Affiliation(s)
- M H Wang
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Z X Hu
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - L Z Feng
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - H J Yu
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - J Yang
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
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Li Q, Chen Z, Zhang Y, Chan RWY, Chong MKC, Zee BCY, Ling L, Lui G, Chan PKS, Wang MH. Genetic association of COVID-19 severe versus non-severe cases by RNA sequencing in patients hospitalised in Hong Kong. Hong Kong Med J 2024; 30:25-31. [PMID: 38327202 DOI: 10.12809/hkmj2210178] [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: 02/09/2024] Open
Abstract
INTRODUCTION The coronavirus disease 2019 (COVID-19) pandemic has caused extensive disruption of public health worldwide. There were reports of COVID-19 patients having multiple complications. This study investigated COVID-19 from a genetic perspective. METHODS We conducted RNA sequencing (RNA-Seq) analysis of respiratory tract samples from 24 patients with COVID-19. Eight patients receiving mechanical ventilation or extracorporeal membrane oxygenation were regarded as severe cases; the remaining 16 patients were regarded as non-severe cases. After quality control, statistical analyses were performed by logistic regression and the Kolmogorov-Smirnov test to identify genes associated with disease severity. RESULTS Six genes were associated with COVID-19 severity in both statistical tests, namely RPL15, BACE1-AS, CEPT1, EIF4G1, TMEM91, and TBCK. Among these genes, RPL15 and EIF4G1 played roles in the regulation of mRNA translation. Gene ontology analysis showed that the differentially expressed genes were mainly involved in nervous system diseases. CONCLUSION RNA sequencing analysis showed that severe acute respiratory syndrome coronavirus 2 infection is associated with the overexpression of genes involved in nervous system disorders.
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Affiliation(s)
- Q Li
- The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR, China
- The Chinese University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - Z Chen
- Department of Microbiology, Stanley Ho Centre for Emerging Infectious Diseases, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Y Zhang
- The Chinese University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - R W Y Chan
- Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- Laboratory for Paediatric Respiratory Research, Li Ka Shing Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- CUHK-UMCU Joint Research Laboratory of Respiratory Virus and Immunobiology, Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- Hong Kong Hub of Paediatric Excellence, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - M K C Chong
- The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR, China
- The Chinese University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - B C Y Zee
- The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR, China
- The Chinese University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - L Ling
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - G Lui
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - P K S Chan
- Department of Microbiology, Stanley Ho Centre for Emerging Infectious Diseases, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - M H Wang
- The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong SAR, China
- The Chinese University of Hong Kong Shenzhen Research Institute, Shenzhen, China
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Wen CJ, Wang MH, Yu P, Zhou Q. [Advances in clinical significance and detection methods research of high density lipoprotein subfractions]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:1901-1907. [PMID: 38008584 DOI: 10.3760/cma.j.cn112150-20230220-00134] [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: 11/28/2023]
Abstract
High density lipoprotein (HDL) is an important biochemical index of clinical cardiovascular disease. Many new studies have demonstrated abnormalities of plasma HDL subfractions in patients with this disease,and their clinical significance is greater than the overall abnormalities of HDL. Therefore,the HDL subfraction as an important factor in cardiovascular disease has attracted extensive research and attention. This article summarizes current research on HDL subfractions,their measurements and their relationships with atherosclerosis and coronary artery disease.
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Affiliation(s)
- C J Wen
- Jinyu School of Laboratory Medicine,Guangzhou Medical University, Guangzhou 510260,China
| | - M H Wang
- Laboratory Department, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260,China
| | - P Yu
- Laboratory Department, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260,China
| | - Q Zhou
- Laboratory Department, the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou 510260,China
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Zhong GJ, Wang MH, Ge JW, Yang J. [Analysis on the implementation of payment policies for four non-national immunization program vaccines in China]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:1843-1847. [PMID: 38008575 DOI: 10.3760/cma.j.cn112150-20230118-00043] [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: 11/28/2023]
Abstract
This study systematically retrieved information on the payment policy of vaccination fees for pneumococcal vaccines, human papillomavirus vaccines, haemophilus influenzae type b vaccines and rotavirus vaccines using a Python-based crawler. The proportion of the population covered by policies among the total applicable population was estimated based on the medical insurance coverage ratio and population data in 2020. This study showed that the payment policies included two categories, government-funded free vaccination policies and medical insurance payment policies. Among the four non-national immunization program vaccines, the free vaccination policies only involved pneumococcal vaccines and human papillomavirus vaccines. Among them, the 13-valent pneumococcal conjugate vaccine, the 23-valent pneumococcal polysaccharide vaccine, and the human papillomavirus vaccine were provided free of charge in 1, 10 and 15 provinces, respectively. For these policies, the corresponding covered population and the proportion among the total applicable population were children aged 6 months to 2 years old (2.5%), older people (1.2% to 21.5%) and middle school girls (1.1% to 12.2%). Medical insurance payment policies were implemented in 14 provinces, and nearly covered the four types of vaccines in the policy implementation areas, with the proportion of the covered population about 10.9% to 41.5% among the total applicable population.
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Affiliation(s)
- G J Zhong
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - M H Wang
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - J W Ge
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - J Yang
- School of Public Health/Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
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Wang MH, Ye Y, Zhang M, Zhou BR, Wang JN, Song YN, Xia W. Exosome-mediated delivery of SCD-1 siRNA promoted the death of anaplastic thyroid carcinoma cells via regulating ROS level. Clin Transl Oncol 2022; 24:288-296. [PMID: 34287816 DOI: 10.1007/s12094-021-02682-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 07/08/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE Anaplastic thyroid carcinoma (ATC) is one of the most aggressive cancers in the world. Stearoyl-CoA desaturase-1 (SCD-1) is one of major enzymes in the de novo synthesis of fatty acids and is related to cancer aggressiveness and poor patient prognosis. The study aimed to construct exosomes loaded SCD-1 interference, investigate its effects and mechanisms on the cell proliferation and apoptosis of ATC cells. METHODS The expressions of SCD-1 in normal thyroid cell line and ATC cell lines were determined by qRT-PCR and western blotting, respectively. Exosomes were prepared and purification then loaded with SCD-1 siRNA by electroporation and observed by transmission electron microscopy. Higher SCD-1 mRNA and protein levels were found in ATC cell lines compared than normal thyroid cell line (P < 0.05), and both Hth-7 and FRO cells could uptake PKH67-labeled exosomes. The effects of exosomes loaded SCD-1 siRNA on ATC cells were measured by CCK8 assay and apoptosis detection kit. RESULTS When compared with control group, the cell viability significantly decreased in both two ATC cell lines taken up exosomes loaded SCD-1 siRNA (P < 0.001), and apoptotic and necrotic cells obviously increased (P < 0.05). In order to explore the mechanism of exosomes loaded SCD-1 on ATC, the ROS level was detected by fluorescence reagent. It was found that exosomes loaded SCD-1 siRNA significantly increased intracellular ROS level of ATC cells (P < 0.05). CONCLUSIONS Exosomes loaded SCD-1 siRNA inhibited ATC cellular proliferation and promoted cellular apoptosis, and the mechanisms involved maybe the regulation of fatty acids metabolism and ROS level. Our study provides a promising therapeutic strategy for ATC.
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Affiliation(s)
- M H Wang
- Department of Nuclear Medicine, The Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, 358 Datong Road, Pudong, Shanghai, 200137, People's Republic of China
| | - Y Ye
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - M Zhang
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - B R Zhou
- Department of Nuclear Medicine, The Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, 358 Datong Road, Pudong, Shanghai, 200137, People's Republic of China
| | - J N Wang
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - Y N Song
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China
| | - W Xia
- Department of Nuclear Medicine, The Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, 358 Datong Road, Pudong, Shanghai, 200137, People's Republic of China.
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Zheng F, Xu R, Zeng ZP, Liu CL, Duan YH, Cheng ZP, Sun Q, Liu Q, Wang MH, Han PX, Wang YL, Wang JN, Huang W, Guo XH, Yang XQ. [Cardiac paraganglioma caused by a missense mutation of SDHB gene: a case report]. Zhonghua Nei Ke Za Zhi 2021; 60:910-914. [PMID: 34551482 DOI: 10.3760/cma.j.cn112138-20201122-00963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- F Zheng
- Department of Cardiology, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - R Xu
- Department of Cardiology, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - Z P Zeng
- Department of Endocrinology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - C L Liu
- Department of Cardiology, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - Y H Duan
- Department of PET/CT, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - Z P Cheng
- Department of PET/CT, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - Q Sun
- Department of Pathology, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - Q Liu
- Department of Pathology, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - M H Wang
- Department of Cardiac Surgery, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - P X Han
- Department of Imaging, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - Y L Wang
- Department of Anesthesiology, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - J N Wang
- Department of Urinary Surgery, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - W Huang
- Department of Echocardiography, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - X H Guo
- Department of Pathology, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
| | - X Q Yang
- Department of Pathology, the First Affiliated Hospital of Shandong First Medical University, Ji'nan 250014, China
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Wang MH, Hui P. [Immunohistochemical and molecular pathological typing in the differential diagnosis and prognosis risk assessment of endometrial carcinoma]. Zhonghua Bing Li Xue Za Zhi 2021; 50:1078-1082. [PMID: 34496509 DOI: 10.3760/cma.j.cn112151-20210628-00463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- M H Wang
- Department of Pathology, Yale University School of Medicine, New Haven 06520-802, U S A
| | - P Hui
- Department of Pathology, Yale University School of Medicine, New Haven 06520-802, U S A
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Yu CJ, Xun YF, Wang MH, Xu ZR, Gao X. [Research progress of mesenchymal stem cells on nasal mucosa regeneration after the damaged and lost]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2020; 55:1181-1185. [PMID: 33342138 DOI: 10.3760/cma.j.cn115330-20200322-00227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- C J Yu
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Jiangsu Provincial Key Medical Discipline, Research of Institution of otorhinolaryngology, Drum Tower Hospital, Nanjing 210008, China
| | - Y F Xun
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second XiangYa Hospital, Central South University, Changsha 410000, China
| | - M H Wang
- Department of Otorhinolaryngology, Head and Neck Surgery, the Second XiangYa Hospital, Central South University, Changsha 410000, China
| | - Z R Xu
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Jiangsu Provincial Key Medical Discipline, Research of Institution of otorhinolaryngology, Drum Tower Hospital, Nanjing 210008, China
| | - X Gao
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Jiangsu Provincial Key Medical Discipline, Research of Institution of otorhinolaryngology, Drum Tower Hospital, Nanjing 210008, China
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9
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You YY, Song Y, Wang MH, Zhang LL, Bai W, Yu WY, Yu YQ, Kou CG. [Exposure to famine in fetus and infant period and risk for hypertension in adulthood]. Zhonghua Liu Xing Bing Xue Za Zhi 2020; 41:74-78. [PMID: 32062946 DOI: 10.3760/cma.j.issn.0254-6450.2020.01.014] [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] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the relationship between exposure to famine in fetus and infant period and the risks for hypertension in adulthood. Methods: A total of 5 960 participants born between 1956 and 1965 were included in the study and were divided into unexposed group (1963-1965), fetal exposed group (1959-1961), early- childhood exposed group (1956-1958) and transitional group (1962). Logistic regression model was used to explore the association between famine exposure in early life and the risk for hypertension in adulthood. Results: Both the fetal exposure and the early-childhood exposure were the risk factors for hypertension in adulthood (OR=1.249, 95%CI: 1.049-1.486 and OR=1.360, 95%CI: 1.102-1.679). Meanwhile, in rural area, compared with unexposed group, the fetal exposure (OR=1.401, 95%CI: 1.091-1.798) and the early-childhood exposure (OR=1.460, 95%CI: 1.145-1.862) were also associated with a greater risk of hypertension in adulthood. In addition, fetal exposure and early-childhood exposure to famine in women were associated with 36.0% and 31.9% increased risks for hypertension (95%CI: 7.8%-71.7% and 95%CI: 4.8%-66.0%) according to the stratified analysis. Conclusion: Fetal exposure to famine might increase the risk for hypertension in adulthood.
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Affiliation(s)
- Y Y You
- Department of Epidemiology and Statistics, School of Public Health, Jilin University, Changchun 130021, China; Health Education Division, Center for Chronic Disease Control, Nanshan District, Shenzhen 518000, China
| | - Y Song
- Department of Epidemiology and Statistics, School of Public Health, Jilin University, Changchun 130021, China
| | - M H Wang
- Department of Epidemiology and Statistics, School of Public Health, Jilin University, Changchun 130021, China
| | - L L Zhang
- Department of Epidemiology and Statistics, School of Public Health, Jilin University, Changchun 130021, China
| | - W Bai
- Department of Epidemiology and Statistics, School of Public Health, Jilin University, Changchun 130021, China
| | - W Y Yu
- Department of Epidemiology and Statistics, School of Public Health, Jilin University, Changchun 130021, China
| | - Y Q Yu
- Department of Epidemiology and Statistics, School of Public Health, Jilin University, Changchun 130021, China
| | - C G Kou
- Department of Epidemiology and Statistics, School of Public Health, Jilin University, Changchun 130021, China
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Xun YF, Wang MH, Sun HY, Guan B. [Comparative analysis of sleep monitoring between young and middle-aged and elderly OSA patients]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:643-646. [PMID: 31327204 DOI: 10.13201/j.issn.1001-1781.2019.07.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Indexed: 11/12/2022]
Abstract
Objective:The aim of this study is to compare the night sleep hypoxia degree and sleep structure of young and middle-aged and elderly patients with OSA, so that PSG has more important application value.Method:A total of 438 patients diagnosed with OSA from February 2017 to January 2019 were selected,including 119 patients in the youth group with an average age of (28.5±5.1)years,and 319 patients in the middle and elderly group with an average age of (45.8±2.7)years.The results recorded by PSG in the two groups were retrospectively analyzed. Result:①The AHI, ODI, OAI, MAI and ASaO₂of OSA patients in the junior group were significantly higher than those in the middle-aged and elderly group, while CAI was not statistically significant between the two groups (P=0.419).②The NREM stage Ⅰ (61.1±4.3)% in the junior group was significantly higher than that in the junior group (53.3±3.4)%.NREM stage Ⅱ (33.2±2.3)% and NREM stage Ⅲ+Ⅳ (4.3±1.3)% in the junior group were higher than those in the middle-aged group (29.2±3.9)% and stage Ⅲ+Ⅳ (2.6±0.9)%, while the percentage of REM stage and microarousal index were not statistically significant between the two groups.③Young OSA patients were associated with hypertension and 47.0% middle-aged and elderly patients were associated with hypertension.There was no statistical difference between the two groups in whether hypertension was associated with hypertension or not.Conclusion:The NREM phase is particularly susceptible to age, and age affects slow wave sleep. The sleep structure of middle-aged and older people demonstrates their sleep characteristics: reduced total sleep time,slow wave sleep,low sleep efficiency,and delayed sleep. The young people's nighttime hypoxia is more serious. AHI,ODI,OAI,MAI,ASaO₂ and other indicators are significantly higher than the middle-aged and elderly people, but the sleep structure 2 groups are similar, indicating that young people have strong sleep physiological compensation and Adjustment ability.
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Affiliation(s)
- Y F Xun
- Department of Otolaryngology, the Second Xiangya Hospital of Central South University, Changsha, 410000, China
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Fei SX, Wang F, Wang MH, Huang Y. [Vestibular function test in patients sudden sensorineural hearing loss patients with vertigoand its clinical significance]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:749-752. [PMID: 31446732 DOI: 10.13201/j.issn.1001-1781.2019.08.016] [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] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Indexed: 06/10/2023]
Abstract
Objective:The aim of this study is to analyze the results of vestibular function tests and clinical value of patients with sudden sensorineural hearing loss (SSHL) and vertigo. Method:Twelve cases(24 ears) of unilateral SSHL with vertigo were included in the study group. 11 age and sex matched normal subjects(22 ears) were recruited as the normal control group. Both patients and normal subjects underwent carolic tests, ocular vestibular evoked myogenic potential (oVEMP), and cervical vestibular evoked myogenic potential (cVEMP) in bilateral ears. The results were compared between the subjects and the normal control group. Result: The rate of positive oVEMP was 25.0% in the affected ear and 50.0% in the contralateral ear in patients with SSHL and vertigo, and 90.9% in normal subjects; while the rate of positive cVEMP was 58.3% in the affected ear and 58.3% in the contralateral ear in patients with SSHL and vertigo, and 90.9% in normal subjects. There were no significant differences between the affected and contralateral ears (P>0.05). Compared to normal subjects, oVEMP and cVEMP in both the affected and contralateral ears were significantly reduced (P<0.05). The parameters of oVEMP and cVEMP (N1 latency, P1 latency, amplitudes) were not significantly different among the groups(P<0.05). Compared to normal subjects, the threshold difference of oVEMP and cVEMP in both the affected and contralateral ears werehigher than the normal subjects(P<0.05). Among 12 SSHL patients who underwent caloric test, 9 were found with unilateral semicircular canal weakness(CP>25%), and the abnormal rate was 75% (9/12). Conclusion:Patients with vertigo with vertigo have impaired conduction function in the ipsilateral and contralateral vestibular pathways, mainly due to decreased vestibular evoked myogenic potential, increased threshold, and abnormal cold and heat tests. The vestibular function test provides an objective basis for assessing the inner ear injury in patients with vertigo.
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Affiliation(s)
- S X Fei
- College of Medical Technology,Zhejiang Chinese Medical University,Hangzhou,310053,China
| | - F Wang
- College of Medical Technology,Zhejiang Chinese Medical University,Hangzhou,310053,China
| | - M H Wang
- College of Medical Technology,Zhejiang Chinese Medical University,Hangzhou,310053,China
| | - Y Huang
- College of Medical Technology,Zhejiang Chinese Medical University,Hangzhou,310053,China
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12
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Wang MH, Jin X. [Brief discussion of history of vascular surgery in New China]. Zhonghua Yi Shi Za Zhi 2018; 48:355-358. [PMID: 30669773 DOI: 10.3760/cma.j.issn.0255-7053.2018.06.006] [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] [Indexed: 11/05/2022]
Abstract
The history of vascular surgery in new China could be divided into the following three stages: the first stage, since the early 1980s, the technique of endovascular surgery was introduced in China, developed in some major hospitals, and gradually popularized to some basic hospitals conditionally. Vascular surgery had gradually developed into an independent discipline in China by the late 1980s. The second stage, since the late 1980s, vascular diagnosis and treatment technology, vascular equipment, and related research modification had been improving continuously in China, and achieved certain success, especially since the establishment of the department of vascular surgery affiliated to the Chinese Medical Association in 1993, vascular surgery in China representing its period of primary development. The third stage, since the beginning of the 21st century, the innovation of the technique of endovascular surgery and hybridization technology, and the development of materials technology had contributed to the second leaping forward of vascular surgery in China. Since then, vascular surgery enters a new era of minimally invasive surgery and opens a period of rapid development.
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Affiliation(s)
- M H Wang
- Department of Vascular Surgery, Shandong Provincial Hospital affiliated to Shandong University, Jinan, 250021, China
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Wang MH, Guan B, Yu AM, Dai BY, Yan Q, Chen SS. [Analysis of the recurrence related factors of sinonasal inverted papilloma]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 31:1927-1930. [PMID: 29798318 DOI: 10.13201/j.issn.1001-1781.2017.24.014] [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: 09/06/2017] [Indexed: 11/12/2022]
Abstract
Objective:To evaluate the influence risk factors of recurrence and the methods for reducing recurrence of sinonasal inverted papilloma (SNIP). Method:Clinical data of 34 patients with SNIP were analyzed retrospectively. All of them were unilateral onset. The diagnosis was confirmed pathologically and the range of lesions was determined by endoscopic and imaging examination; clinical classification according to Krouse classification method; All operations were performed under nasal endoscope, of which 20 cases were operated by simple nasal endoscope, and 14 cases were operated by endoscopic anterior lacrimal recess approach. The patients were followed up for 12-36 months. The curative effects were observed and the prognostic factors of the patients were analyzed. Result:Thirty-four cases of SNIP patients with postoperative recurrence rate was 17.65% (6/34); simple nasal endoscopic surgery in 20 cases, the recurrence rate was 25.00%(5/20); endoscopic anterior lacrimal recess approach in 14 cases, the recurrence rate was 7.14%(1/14), the difference was statistically insignificant (χ²=1.807, P>0.05). Four cases in stage Ⅰ had no recurrence;20 cases in stage Ⅱ, the recurrence rate was 15.0%(3/20); 9 cases in stage Ⅲ, the recurrence rate was 33.3%(3/9); 1 case in stage Ⅳ had no recurrence, the recurrence rate of the patients with different stages were statistically insignificant (χ²=2.692, P>0.05). Conclusion:Simple endoscopic resection of the tumor and endoscopic anterior lacrimal recess surgery are effective methods for the treatment of SNIP. The nasal surgery history and tumor origin are the risk factors for recurrence. The operation completely tumorresection,detailed preoperative examination and postoperative regular endoscopic examination are the keys to preventing recurrence.
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Affiliation(s)
- M H Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Xiangya No.2 Hospital of Central South University, Changsha, 410000, China
| | - B Guan
- Department of Otorhinolaryngology Head and Neck Surgery, Jiangsu Subei People's Hospital
| | - A M Yu
- Department of Otorhinolaryngology Head and Neck Surgery, Jiangsu Subei People's Hospital
| | - B Y Dai
- Department of Otorhinolaryngology Head and Neck Surgery, Jiangsu Subei People's Hospital
| | - Q Yan
- Department of Otorhinolaryngology Head and Neck Surgery, Jiangsu Subei People's Hospital
| | - S S Chen
- Department of Otorhinolaryngology Head and Neck Surgery, Jiangsu Subei People's Hospital
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14
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Shi SJ, Yu AM, Guan B, Wang MH, Dai BY, Yan Q. [Two cases of piriform pit carcinoma were repaired with thyroid lobe]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:1511-1514. [PMID: 30550202 DOI: 10.13201/j.issn.1001-1781.2018.19.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Indexed: 11/12/2022]
Abstract
Two cases with piriform fossa cancer underwent larynx lateral wall repair surgery. Case 1: The patient was admitted to the hospital because of pharyngeal discomfort with swallowing pain for 2 months Electronic laryngoscopy revealed neoplasm in the left piriform fossa. Space occupying lesion in left piriform fossa and paranasal space was found in MRI scan. The pathological diagnosis of this patient was squamous cell squamous cell carcinoma (T2N1M0). Case 2: The patient was admitted to the hospital because of blood in the sputum for more than 1 year. The electronic laryngoscope suggested neoplasm in the pharyngeal space and left vocal cord paralysis.Soft tissue thickening of the oropharynx and hypopharyngeal right wall was found in MRI scan. The pathological diagnosis of this patient was squamous cell carcinoma (T1N2M0).
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15
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Wang MH, Wu XJ, Jin X. [Various choices of reconstructing the left subclavicular artery to extend the proximal landing zone thoracic endovascular aortic repair]. Zhonghua Wai Ke Za Zhi 2018; 56:745-748. [PMID: 30369153 DOI: 10.3760/cma.j.issn.0529-5815.2018.10.007] [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] [Indexed: 11/05/2022]
Abstract
Thoracic endovascular aortic repair (TEVAR) has become the preferred treatment for Stanford type B aortic dissection. Covered the left subclavian artery (LSA) directly may cause corresponding complications in Stanford type B aortic dissection with unfavourable proximal landing zone. TEVAR can be successfully implemented by reconstructing LSA to expand the proximal landing zone. Currently, the methods of reconstructing LSA mainly include hybridization technology (carotid-subclavian artery transposition), chimney technology (including branch stent technology) and fenestration (or slot technology), etc. These techniques are all valid for aortic dissection that needs to reconstructing LSA. The choices and applications of these techniques should follow the individualized principles.
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Affiliation(s)
- M H Wang
- Department of Vascular Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China
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16
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He QQ, Li A, Wang MH, Gao X. [Research progress of Lgr5-positive stem cells in the formation of organoid in 3D culture]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 53:469-473. [PMID: 29902859 DOI: 10.3760/cma.j.issn.1673-0860.2018.06.020] [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] [Indexed: 11/05/2022]
Abstract
Stem cell is critical to regeneration of tissue or organ of human. How to promote repair or regeneration in the tissues/organ using its pluripotency is always an important issue. Lgr5-possitive cell is one type of the stem cell-like cells capable of pluripotent differentiation in various tissues/organs of both humans and mice. Current study showed that single or small amount Lgr5-possitive stem cells can grow and form a plurality of organs in 3D culture system, and some organs can present similar biological and physiological properties with the progenitor they were derived. These studies provided new insight into future orientation, for example, Lgr5-possitive inner ear cells were confirmed as inner ear pluripotent cells population, the experiences obtained from organoid studies of Lgr5-possitive cells have certainly showed potential in the future study of inner ear stem cells. This review will focus on the recent progress associated with Lgr 5-positive stem cells forming organoids in the 3D culture.
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Affiliation(s)
- Q Q He
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Research Institute of Otolaryngology, 210008 Nanjing, China
| | - A Li
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Research Institute of Otolaryngology, 210008 Nanjing, China
| | - M H Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Xiangya No.2 Hospital of Central South University, 410011 Changsha, China
| | - X Gao
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Research Institute of Otolaryngology, 210008 Nanjing, China
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17
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Wang MH, Ge ZL, Tian L, Li PR, Che YQ. [Effect of three types of rapid maxillary expansion: a three-dimensional finite element study]. Zhonghua Kou Qiang Yi Xue Za Zhi 2017; 52:678-683. [PMID: 29972947 DOI: 10.3760/cma.j.issn.1002-0098.2017.11.006] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Objective: To evaluate the transverse displacement, stress distribution and tendency of change in tooth, alveolar bone and mid-palatal suture using three kinds of rapid maxillary expansion methods. Methods: Cone-beam CT image data was obtained by scanning skulls of a volunteer. Three-dimensional models of maxillary complex were re-established using Mimics and Geomagic Studio and models of Hyrax expander, Haas expander and miniscrew-assisted rapid palatal expander (MARPE) were established using ANSYS Workbench. Stress distribution, displacement and tendency of change in tooth, alveolar bone and mid-palatal suture were evaluated. Results: Hyrax expander brought 0.105 mm lateral displacement of crown, 0.022 mm mid-palatal suture width increase, wedge opening and clockwise rotation tendency of maxilla. Haas expander created uniform stress distribution, 0.216 mm lateral displacement of crown, and 0.031 mm mid-palatal suture width increase. In MARPE model, the lateral displacement of crown was 0.267 mm, and mid-palatal suture width increased 0.315 mm. The maximum of mid-palatal suture expansion and stress distribution appeared in the middle region, and maxilla had tendency of counterclockwise rotation. Conclusions: The lateral changes of teeth and bones brought by MARPE were the most significant. Haas expander had some advantages in comparison with Hyrax.
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Affiliation(s)
- M H Wang
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou 730000, China
| | - Z L Ge
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou 730000, China
| | - L Tian
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou 730000, China
| | - P R Li
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou 730000, China
| | - Y Q Che
- Department of Orthodontics, School of Stomatology, Lanzhou University, Lanzhou 730000, China
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18
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Li LY, Sun BD, Zhang GS, Deng H, Wang MH, Tan XM, Zhang XY, Jia HM, Zhang HW, Zhang T, Zou ZM, Ding G. Polyketides with different post-modifications from desert endophytic fungus Paraphoma sp. Nat Prod Res 2017; 32:939-943. [PMID: 28857613 DOI: 10.1080/14786419.2017.1371166] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 10/19/2022]
Abstract
Three new polyketides 4,6,8-trihydroxy-5-methyl-3,4-dihydronaphthalen-1(2H)-one (1), 5,7-dihydroxy-3-(1-hydroxyethyl)-3,4-dimethylisobenzofuran-1(3H)-one (2) and 1-(4-hydroxy-6-methoxy-1,7-dimethyl-3-oxo-1,3-dihydroisobenzofuran-1-yl) ethyl acetate (3) together with seven known analogues (4-10) were isolated from desert endophytic fungus Paraphoma sp. The structures of these compounds were elucidated by analysis of NMR data. The absolute configuration of (1-3) was established on the basis of CD experiments. The possible biosynthetic pathway of compounds (1-10) was suggested, which implied that these secondary metabolites might be originated from polyketide biosynthesis with different post-modification reactions. Compounds 2, and 5-8 were evaluated for bioactivities against plant pathogen A. solani, whereas none of them displayed any biological effects. In addition, compounds 1, 2 and 5-10 were also tested for cytotoxic activities against three human cancer cell lines (HepG2 cells, MCF-7 cells and Hela cells) without biological effects.
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Affiliation(s)
- L Y Li
- a Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , P.R. China
| | - B D Sun
- b Institute of Microbiology , Chinese Academy of Sciences , Beijing , P.R. China
| | - G S Zhang
- c Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning , Chinese Academy of Agricultural Sciences , Beijing , P.R. China
| | - H Deng
- c Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning , Chinese Academy of Agricultural Sciences , Beijing , P.R. China
| | - M H Wang
- a Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , P.R. China
| | - X M Tan
- a Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , P.R. China
| | - X Y Zhang
- a Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , P.R. China
| | - H M Jia
- a Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , P.R. China
| | - H W Zhang
- a Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , P.R. China
| | - T Zhang
- a Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , P.R. China
| | - Z M Zou
- a Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , P.R. China
| | - G Ding
- a Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , P.R. China
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Zhao Y, Su XH, Wang MH, Li ZY, Li EK, Xu X. Evaluation of water resources system vulnerability based on co-operative co-evolutionary genetic algorithm and projection pursuit model under the DPSIR framework. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1755-1315/82/1/012049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Hu DY, Huang DJ, Yuan ZY, Zhao RP, Yan XW, Wang MH. [Efficacy and safety analysis of ivabradine hydrochloride treatment of Chinese patients with chronic heart failure: subgroup analysis of Chinese patients in the SHIFT study]. Zhonghua Xin Xue Guan Bing Za Zhi 2017; 45:190-197. [PMID: 28316174 DOI: 10.3760/cma.j.issn.0253-3758.2017.03.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the efficacy and safety of ivabradine for the treatment of Chinese patients with chronic heart failure based on the Chinese subgroup data of the systolic heart failure treatment with the I(f) inhibitor ivabradine trial (SHIFT). Method: A total of 6 558 stable outpatients who presented symptoms of heart failure, with a left ventricular ejection fraction (LVEF) ≤35%, sinus rhythms with a heart rate ≥70 bpm participated in the randomized, double-blind, placebo-controlled, international multicenter clinical study.The subset of Chinese patients with heart rate ≥75 bpm was enrolled in the post-hoc subgroup analyses.Patients were randomly allocated by computer-generated assignment through a telephone interactive voice response system to ivabradine group (starting dose 5 mg bid, which was then uptitrated to the maximum 7.5 mg bid) or matched placebo group.The clinical baseline characteristics of participants were obtained and analyzed.The primary outcome endpoint was a composite endpoint of cardiovascular death or hospitalization resulting from worsening HF.The primary safety endpoint included total incidence of adverse events during the study, bradycardia, and adverse visual reaction (phosphenes). Results: A total of 49 Chinese centers enrolled a total of 225 patients with chronic heart failure, of whom, 106 patients were randomized to the ivabradine group and the other 119 patients to the placebo group, and the mean follow-up time was (15.6±5.1) months.By the end of the study, mean heart rate (71.0 bpm vs. 80.3 bpm, P<0.05) and incidence of the primary endpoint events (18.9% (20/106) vs. 31.9%(38/119), HR=0.56, 95%CI 0.33-0.97, P=0.039) were significantly lower, while the percentage of patients with improvement in heart functional class NYHA (53.8% (56/106) vs. 34.5% (41/119), P=0.006 1) was significantly higher in the ivabradine group than in the placebo group.The total number of adverse events (129 events, 49.6% PY) in the ivabradine group was lower than that in the placebo group (203 events, 50.8% PY). In the ivabradine group and the placebo group, there were respectively 2 patients (1.9%) and 0 patients experienced bradycardia, 3 patients (2.9%) and 1 patient (0.8%) experienced adverse visual reaction (phosphenes). Conclusions: Ivabradine significantly reduced heart rate and improved the clinical outcomes and NYHA function class in Chinese patients with chronic heart failure, these beneficial effects are achieved without inducing remarkable adverse reactions.The results of Chinese subgroup analysis were thus consistent with the overall results of the SHIFT study. Clinical Trial Registry: International standard randomized controlled trials registry, ISRCTN 70429960.
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Affiliation(s)
- D Y Hu
- Department of Cardiology, Peking University People's Hospital, Beijing 100044, China
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21
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Rivas MA, Graham D, Sulem P, Stevens C, Desch AN, Goyette P, Gudbjartsson D, Jonsdottir I, Thorsteinsdottir U, Degenhardt F, Mucha S, Kurki MI, Li D, D'Amato M, Annese V, Vermeire S, Weersma RK, Halfvarson J, Paavola-Sakki P, Lappalainen M, Lek M, Cummings B, Tukiainen T, Haritunians T, Halme L, Koskinen LLE, Ananthakrishnan AN, Luo Y, Heap GA, Visschedijk MC, MacArthur DG, Neale BM, Ahmad T, Anderson CA, Brant SR, Duerr RH, Silverberg MS, Cho JH, Palotie A, Saavalainen P, Kontula K, Färkkilä M, McGovern DPB, Franke A, Stefansson K, Rioux JD, Xavier RJ, Daly MJ, Barrett J, de Lane K, Edwards C, Hart A, Hawkey C, Jostins L, Kennedy N, Lamb C, Lee J, Lees C, Mansfield J, Mathew C, Mowatt C, Newman B, Nimmo E, Parkes M, Pollard M, Prescott N, Randall J, Rice D, Satsangi J, Simmons A, Tremelling M, Uhlig H, Wilson D, Abraham C, Achkar JP, Bitton A, Boucher G, Croitoru K, Fleshner P, Glas J, Kugathasan S, Limbergen JV, Milgrom R, Proctor D, Regueiro M, Schumm PL, Sharma Y, Stempak JM, Targan SR, Wang MH. A protein-truncating R179X variant in RNF186 confers protection against ulcerative colitis. Nat Commun 2016; 7:12342. [PMID: 27503255 PMCID: PMC4980482 DOI: 10.1038/ncomms12342] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 06/24/2016] [Indexed: 01/05/2023] Open
Abstract
Protein-truncating variants protective against human disease provide in vivo validation of therapeutic targets. Here we used targeted sequencing to conduct a search for protein-truncating variants conferring protection against inflammatory bowel disease exploiting knowledge of common variants associated with the same disease. Through replication genotyping and imputation we found that a predicted protein-truncating variant (rs36095412, p.R179X, genotyped in 11,148 ulcerative colitis patients and 295,446 controls, MAF=up to 0.78%) in RNF186, a single-exon ring finger E3 ligase with strong colonic expression, protects against ulcerative colitis (overall P=6.89 × 10(-7), odds ratio=0.30). We further demonstrate that the truncated protein exhibits reduced expression and altered subcellular localization, suggesting the protective mechanism may reside in the loss of an interaction or function via mislocalization and/or loss of an essential transmembrane domain.
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Affiliation(s)
- Manuel A. Rivas
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Daniel Graham
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
| | | | - Christine Stevens
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
| | - A. Nicole Desch
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
| | - Philippe Goyette
- Research Center, Montreal Heart Institute, Montréal, Québec, Canada H1T1C8
| | - Daniel Gudbjartsson
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- School of Engineering and Natural Sciences, University of Iceland, 101 Reykjavik, Iceland
| | - Ingileif Jonsdottir
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- Department of Immunology, Landspitali, the National University Hospital of Iceland, 101 Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, 101 Reykjavik, Iceland
| | - Unnur Thorsteinsdottir
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, 101 Reykjavik, Iceland
| | - Frauke Degenhardt
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, 24118 Kiel, Germany
| | - Sören Mucha
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, 24118 Kiel, Germany
| | - Mitja I. Kurki
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Dalin Li
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
- Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California 90048 USA
| | - Mauro D'Amato
- Department of Biosciences and Nutrition, Karolinska Institutet, 14183 Stockholm, Sweden
- BioCruces Health Research Institute and IKERBASQUE, Basque Foundation for Science, 48903 Bilbao, Spain
| | - Vito Annese
- Unit of Gastroenterology, Istituto di Ricovero e Cura a Carattere Scientifico-Casa Sollievo della Sofferenza (IRCCS-CSS) Hospital, 71013 San Giovanni Rotondo, Italy
- Strutture Organizzative Dipartimentali (SOD) Gastroenterologia 2, Azienda Ospedaliero Universitaria (AOU) Careggi, 50134 Florence, Italy
| | - Severine Vermeire
- Department of Clinical and Experimental Medicine, Translational Research in GastroIntestinal Disorders (TARGID), Katholieke Universiteit (KU) Leuven, Leuven 3000, Belgium
- Division of Gastroenterology, University Hospital Gasthuisberg, BE-3000 Leuven, Belgium
| | - Rinse K. Weersma
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
| | - Jonas Halfvarson
- Department of Gastroenterology, Faculty of Medicine and Health, Örebro University, SE 701 82 Örebro, Sweden
| | - Paulina Paavola-Sakki
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
- Clinic of Gastroenterology, Helsinki University Hospital, 00100 Helsinki, Finland
| | - Maarit Lappalainen
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
- Research Programs Unit, Immunobiology, and Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland
| | - Monkol Lek
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Beryl Cummings
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Taru Tukiainen
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Talin Haritunians
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
- Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California 90048 USA
| | - Leena Halme
- Department of Transplantation and Liver Surgery, University of Helsinki, 00100 Helsinki, Finland
| | - Lotta L. E. Koskinen
- Research Programs Unit, Immunobiology, and Department of Medical and Clinical Genetics, University of Helsinki, 00014 Helsinki, Finland
- Department of Medical Genetics, Biomedicum Helsinki, University of Helsinki, 00100 Helsinki, Finland
| | - Ashwin N. Ananthakrishnan
- Gastroenterology Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Division of Medical Sciences, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Yang Luo
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton CB10 1SA, UK
| | - Graham A. Heap
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - Marijn C. Visschedijk
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
| | - Daniel G. MacArthur
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Benjamin M. Neale
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Tariq Ahmad
- Peninsula College of Medicine and Dentistry, Exeter PL6 8BU, UK
| | - Carl A. Anderson
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton CB10 1SA, UK
| | - Steven R. Brant
- Meyerhoff Inflammatory Bowel Disease Center, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland, 21205, USA
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, 21205, USA
| | - Richard H. Duerr
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, USA
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania 15261, USA
| | - Mark S. Silverberg
- Department of Medicine, Inflammatory Bowel Disease Centre, Mount Sinai Hospital, Toronto, Ontario, Canada M5G 1X5
| | - Judy H Cho
- Department of Genetics, Yale School of Medicine, New Haven, Connecticut 06510, USA
| | - Aarno Palotie
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
- Institute for Molecular Medicine Finland, University of Helsinki, 00100 Helsinki, Finland
- Massachusetts General Hospital, Center for Human Genetic Research, Psychiatric and Neurodevelopmental Genetics Unit, Boston, Massachusetts 02114, USA
| | - Päivi Saavalainen
- Research Programs Unit, Immunobiology, University of Helsinki, 00100 Helsinki, Finland
| | - Kimmo Kontula
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
| | - Martti Färkkilä
- Department of Medicine, University of Helsinki, 00100 Helsinki, Finland
- Helsinki University Hospital, 00100 Helsinki, Finland
- Clinic of Gastroenterology, Helsinki University Hospital, 00100 Helsinki, Finland
| | - Dermot P. B. McGovern
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
- Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California 90048 USA
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, 24118 Kiel, Germany
| | - Kari Stefansson
- deCODE Genetics, Amgen Inc., 101 Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, 101 Reykjavik, Iceland
| | - John D. Rioux
- Research Center, Montreal Heart Institute, Montréal, Québec, Canada H1T1C8
- Faculté de Médecine, Université de Montréal, Montréal, Québec, Canada H3T 1J4
| | - Ramnik J. Xavier
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Gastroenterology Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Mark J. Daly
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - J. Barrett
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - K. de Lane
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - C. Edwards
- Department of Gastroenterology, Torbay Hospital, Devon, UK
| | - A. Hart
- Department of Medicine, St. Mark's Hospital, Middlesex, UK
| | - C. Hawkey
- Nottingham Digestive Disease Centre, Queens Medical Centre, Nottingham, UK
| | - L. Jostins
- Wellcome Trust Centre for Human Genetics, University of Oxford, Headington, UK
- Christ Church, University of Oxford, Oxford, UK
| | - N. Kennedy
- Gastrointestinal Unit, Wester General Hospital, University of Edinburgh, Edinburgh, UK
| | - C. Lamb
- Newcastle University, Newcastle upon Tyne, UK
| | - J. Lee
- Inflammatory Bowel Disease Research Group, Addenbrooke's Hospital, Cambridge, UK
| | - C. Lees
- Gastrointestinal Unit, Wester General Hospital, University of Edinburgh, Edinburgh, UK
| | | | - C. Mathew
- Department of Medical and Molecular Genetics, Guy's Hospital, London, UK
- Department of Medical and Molecular Genetics, King's College London School of Medicine, Guy's Hospital, London, UK
| | - C. Mowatt
- Department of Medicine, Ninewells Hospital and Medical School, Dundee, UK
| | - B. Newman
- Genetic Medicine, Manchester Academic Health Science Centre, Manchester, UK
- The Manchester Centre for Genomic Medicine, University of Manchester, Manchester, UK
| | - E. Nimmo
- Centre for Genomic and Experimental Medicine, University of Edinburgh, Edinburgh, UK
| | - M. Parkes
- Inflammatory Bowel Disease Research Group, Addenbrooke's Hospital, Cambridge, UK
| | - M. Pollard
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - N. Prescott
- Department of Medical and Molecular Genetics, Guy's Hospital, London, UK
- Department of Medical and Molecular Genetics, King's College London School of Medicine, Guy's Hospital, London, UK
| | - J. Randall
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - D. Rice
- IBD Pharmacogenetics, Royal Devon and Exeter NHS Trust, Exeter EX2 5DW, UK
| | - J. Satsangi
- Centre for Genomic and Experimental Medicine, University of Edinburgh, Edinburgh, UK
| | - A. Simmons
- Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, Oxford, UK
- Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - M. Tremelling
- Gastroenterology & General Medicine, Norfolk and Norwich University Hospital, Norwich, UK
| | - H. Uhlig
- Translational Gastroenterology Unit and the Department of Pediatrics, University of Oxford, Oxford, UK
| | - D. Wilson
- Pediatric Gastroenterology and Nutrition, Royal Hospital for Sick Children, Edinburgh, UK
- Child Life and Health, University of Edinburgh, Edinburgh, UK
| | - C. Abraham
- Section of Digestive Diseases, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut, USA
| | - J. P. Achkar
- Department of Gastroenterology and Hepatology, Digestive Disease Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - A. Bitton
- Division of Gastroenterology, Royal Victoria Hospital, Montréal, Québec, Canada
| | - G. Boucher
- Research Center, Montreal Heart Institute, Montréal, Québec, Canada H1T1C8
| | - K. Croitoru
- Inflammatory Bowel Disease Group, Zane Cohen Centre for Digestive Diseases, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - P. Fleshner
- Department of Transplantation and Liver Surgery, University of Helsinki, 00100 Helsinki, Finland
| | - J. Glas
- Division of Gastroenterology, Royal Victoria Hospital, Montréal, Québec, Canada
| | - S. Kugathasan
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
| | - J. V. Limbergen
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Hospital for Sick Children, Toronto, Ontario, Canada
| | - R. Milgrom
- Department of Genetics, Yale School of Medicine, New Haven, Connecticut 06510, USA
| | - D. Proctor
- Section of Digestive Diseases, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut, USA
| | - M. Regueiro
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania 15261, USA
| | - P. L. Schumm
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois, USA
| | - Y. Sharma
- Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - J. M. Stempak
- Department of Genetics, Yale School of Medicine, New Haven, Connecticut 06510, USA
| | - S. R. Targan
- Department of Transplantation and Liver Surgery, University of Helsinki, 00100 Helsinki, Finland
| | - M. H. Wang
- Division of Gastroenterology, Hepatology and Nutrition, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, USA
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22
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Liu SL, Yang RJ, Pan YZ, Wang MH, Zhao Y, Wu MX, Hu J, Zhang LL, Ma MD. Exogenous NO depletes Cd-induced toxicity by eliminating oxidative damage, re-establishing ATPase activity, and maintaining stress-related hormone equilibrium in white clover plants. Environ Sci Pollut Res Int 2015; 22:16843-16856. [PMID: 26104900 DOI: 10.1007/s11356-015-4888-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 02/01/2015] [Accepted: 06/15/2015] [Indexed: 06/04/2023]
Abstract
Various nitric oxide (NO) regulators [including the NO donor sodium nitroprusside (SNP), the NO scavenger 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO), the NO-synthase inhibitor N (G)-nitro-L-Arg-methyl ester (L-NAME), and the SNP analogues sodium nitrite/nitrate and sodium ferrocyanide] were investigated to elucidate the role of NO in white clover (Trifolium repens L.) plants after long-term (5 days) exposure to cadmium (Cd). A dose of 100 μM Cd stress significantly restrained plant growth and decreased the concentrations of chlorophyll and NO in vivo, whereas it disrupted the balance of stress-related hormones and enhanced the accumulation of Cd, thereby inducing reactive oxygen species (ROS) burst. However, the inhibition of plant growth was relieved by 50 μM SNP through its stimulation of ROS-scavenging compounds (ascorbic acid, ascorbate peroxidase, catalase, glutathione reductase, non-protein thiol, superoxide dismutase, and total glutathione), regulation of H(+)-ATPase activity of proton pumps, and increasing jasmonic acid and proline but decreasing ethylene in plant tissues. Even so, the alleviating effect of SNP on plant growth was counteracted by cPTIO and L-NAME and was not observed with SNP analogues, suggesting that the protective roles of SNP are related to the induction of NO. These results suggest that NO may improve the Cd tolerance of white clover plants by eliminating oxidative damage, re-establishing ATPase activity, and maintaining hormone equilibrium. Improving our understanding of the role of NO in white clover plants is key to expanding the plantations to various regions and the recovery of pasture species in the future.
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Affiliation(s)
- S L Liu
- Faculty of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, People's Republic of China
| | - R J Yang
- Faculty of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, People's Republic of China
| | - Y Z Pan
- Faculty of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, People's Republic of China
| | - M H Wang
- Faculty of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, People's Republic of China
- Faculty of Agriculture and Life Sciences, Chungnam National University, Daiden, Daejeon, 305-754, South Korea
| | - Y Zhao
- Faculty of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, People's Republic of China
| | - M X Wu
- Faculty of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, People's Republic of China
| | - J Hu
- Faculty of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, People's Republic of China
| | - L L Zhang
- Institute of Kunming Botany, Chinese Academy of Science (CAS), Kunming, Yunnan, 650201, People's Republic of China
| | - M D Ma
- Faculty of Landscape Architecture, Sichuan Agricultural University, Chengdu, Sichuan, 611130, People's Republic of China.
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23
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Behrends DA, Cheng L, Sullivan MB, Wang MH, Roby GB, Zayed N, Gao C, Henderson JE, Martineau PA, Martineau PA. Defective bone repair in mast cell deficient mice with c-Kit loss of function. Eur Cell Mater 2014; 28:209-21; discussion 221-2. [PMID: 25284141 DOI: 10.22203/ecm.v028a14] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
KitW-sh mice carry an inactivating mutation in the gene encoding the receptor for stem cell factor, which is expressed at high levels on the surface of haematopoietic precursor cells. The mutation results in mast cell deficiency, a variety of defects in innate immunity and poorly defined abnormalities in bone. The present study was designed to characterise healing of a cortical window defect in skeletally mature KitW-sh mice using high-resolution micro computed tomographic imaging and histological analyses. The cortical bone defect healed completely in all wild type mice but failed to heal in about half of the KitW-sh mice by 12 weeks post-operative. Defective healing was associated with premature and excessive expression of TRAP positive cells embedded in fibrous marrow but with little change in ALP activity. Immuno-histochemical analyses revealed reduced CD34 positive vascular endothelial cells and F4/80 positive macrophages at 1 and 2 weeks post-operative. Impaired bone healing in the KitW-sh mice was therefore attributed to altered catabolic activity, impaired re-vascularisation and compromised replacement of woven with compact bone.
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Affiliation(s)
- D A Behrends
- Bone Engineering Labs, Research Institute-McGill University Health Centre, Surgical Research, C9.133, Montreal General Hospital, 1650 Cedar Ave, Montreal, Quebec, H3G 1A4,
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24
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Wang MH, Li J, Yeung VSY, Zee BCY, Yu RHY, Ho S, Waye MMY. Four pairs of gene-gene interactions associated with increased risk for type 2 diabetes (CDKN2BAS-KCNJ11), obesity (SLC2A9-IGF2BP2, FTO-APOA5), and hypertension (MC4R-IGF2BP2) in Chinese women. Meta Gene 2014; 2:384-91. [PMID: 25606423 PMCID: PMC4287808 DOI: 10.1016/j.mgene.2014.04.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 12/04/2013] [Revised: 04/01/2014] [Accepted: 04/25/2014] [Indexed: 12/29/2022] Open
Abstract
Metabolic disorders including type 2 diabetes, obesity and hypertension have growing prevalence globally every year. Genome-wide association studies have successfully identified many genetic markers associated to these diseases, but few studied their interaction effects. In this study, twenty candidate SNPs from sixteen genes are selected, and a lasso-multiple regression approach is implemented to consider the SNP–SNP interactions among them in an Asian population. It is found out that the main effects of the markers are weak but the interactions among the candidates showed a significant association to diseases. SNPs from genes CDKN2BAS and KCNJ11 are significantly associated to risk for developing diabetes, and SNPs from FTO and APOA5 might interact to play an important role for the onset of hypertension.
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Affiliation(s)
- M H Wang
- Division of Biostatistics, School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region
| | - J Li
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region
| | - V S Y Yeung
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region
| | - B C Y Zee
- Division of Biostatistics, School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region
| | - R H Y Yu
- Division of Epidemiology, School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region
| | - S Ho
- Division of Epidemiology, School of Public Health and Primary Care, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region
| | - M M Y Waye
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region
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Zhang Y, Jiang J, Zheng XD, Zhang Y, Qi XW, Wang MH, Sun P. Role of Sphk1 in the malignant transformation of breast epithelial cells and breast cancer progression. Indian J Cancer 2014; 51:524-9. [DOI: 10.4103/0019-509x.175343] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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26
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Wang KW, Chueh LL, Wang MH, Huang YT, Fang BH, Chang CY, Fang MC, Chou JY, Hsieh SC, Wan CH. Multiplex polymerase chain reaction assay for the detection of minute virus of mice and mouse parvovirus infections in laboratory mice. Lab Anim 2013; 47:116-21. [PMID: 23492514 DOI: 10.1177/0023677213478298] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Mouse parvoviruses are among the most prevalent infectious pathogens in contemporary mouse colonies. To improve the efficiency of routine screening for mouse parvovirus infections, a multiplex polymerase chain reaction (PCR) assay targeting the VP gene was developed. The assay detected minute virus of mice (MVM), mouse parvovirus (MPV) and a mouse housekeeping gene (α-actin) and was able to specifically detect MVM and MPV at levels as low as 50 copies. Co-infection with the two viruses with up to 200-fold differences in viral concentrations can easily be detected. The multiplex PCR assay developed here could be a useful tool for monitoring mouse health and the viral contamination of biological materials.
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Affiliation(s)
- K W Wang
- Graduate Institute of Veterinary Medicine, National Taiwan University, Taipei, Taiwan, ROC
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Yang YX, Guo J, Jin Z, Yoon SY, Choi JY, Wang MH, Piao XS, Kim BW, Chae BJ. Lysine restriction and realimentation affected growth, blood profiles and expression of genes related to protein and fat metabolism in weaned pigs. J Anim Physiol Anim Nutr (Berl) 2011; 93:732-43. [PMID: 19138351 DOI: 10.1111/j.1439-0396.2008.00863.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To investigate the effects of lysine restriction and subsequent realimentation on growth performance, blood profiles and gene expression of leptin and myostatin, 128 weaned pigs [initial body weight (BW) 6.96 ± 1.07 kg, 26 ± 2 days of age] were randomly allotted to four treatments. The starter diets during the first 2 weeks (P1) contained 100%, 80%, 70% or 60% of recommended lysine levels (National Research Council, 1998). Then, common grower 1 and 2 diets were offered for 2 weeks (P2 and P3) each. During P1, average daily gain (ADG) was linearly reduced (p < 0.05) with the increasing levels of lysine restriction. Growth rate was greater in pigs previously fed lysine-restricted diets than well-fed pigs although it did not reach a significant level during realimentation. However, the final BW and overall ADG were the lowest (p < 0.05) and F/G was poor in pigs fed 60% lysine diet. Relative visceral organ weights and composition of skeletal muscle were similar (p > 0.05) among the treatment. Blood triglyceride and glucose levels were increased (p < 0.05) during P1, while blood urine nitrogen, total protein and albumin levels were decreased (p < 0.05) during P2 with the reduction in dietary lysine levels. The abundance of myostatin mRNA in skeletal muscle and leptin mRNA in subcutaneous adipose tissue were lower (p < 0.05) in lysine-restricted pigs than in pigs fed non-restricted diets. In conclusion, 80% and 70% lysine restriction of starter diets resulted in inferior growth and compensatory growth effect was noted during realimentation, while 60% lysine restriction had a negative influence on growth performance. Moreover, the changes in myostatin and leptin mRNA abundance caused by nutritional manipulations may be involved in the regulation of protein and fat deposition in young pigs.
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Affiliation(s)
- Y X Yang
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea
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Cai GX, Xu Y, Tang DF, Lian P, Peng JJ, Wang MH, Guan ZQ, Cai SJ. Interaction between synchronous bilateral prophylactic oophorectomy and adjuvant chemotherapy in female patients with locally advanced colorectal cancer. Colorectal Dis 2011; 13:414-9. [PMID: 20041916 DOI: 10.1111/j.1463-1318.2009.02179.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
AIM In this study we explored the prognostic impact of synchronous bilateral prophylactic oophorectomy in female patients with primary colorectal cancer undergoing radical surgery. METHOD From 1991 to 2000, 267 female patients with stage II or stage III colorectal cancer, who had undergone curative resection, were retrospectively reviewed. In 224 patients, the ovaries were preserved. The other 43 patients underwent synchronous bilateral prophylactic oophorectomy. Univariate and multivariate analyses (Kaplan-Meier and Cox regression, respectively) were used to evaluate the effect of prophylactic oophorectomy and other clinical factors on the prognosis of patients. RESULTS Both univariate and multivariate analyses showed that tumor stage and adjuvant chemotherapy were the only two significant clinical factors that affected the 5-year overall survival of patients (P < 0.01). There was no significant difference in the 5-year overall survival between patients who had, or had not, undergone prophylactic oophorectomy (75%vs 73%, P > 0.05). In the subgroup analysis by adjuvant chemotherapy, the 5-year overall survival in patients receiving adjuvant chemotherapy was similar between nonoophorectomy and oophorectomy groups. However, in patients without adjuvant chemotherapy, the oophorectomy group was shown to have a significantly better 5-year overall survival than the nonoophorectomy group (76%vs 51%, P = 0.047). CONCLUSION Prophylactic oophorectomy may improve the overall survival of female patients with locally advanced colorectal cancer without adjuvant chemotherapy, but its survival benefit vanished in patients receiving adjuvant chemotherapy. The role of prophylactic oophorectomy may be substituted by adjuvant chemotherapy, which makes prophylactic oophorectomy unnecessary during surgery for locally advanced colorectal cancer.
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Affiliation(s)
- G X Cai
- Department of Colorectal Surgery, Fudan University Shanghai Cancer Centre, Shanghai, China
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Moyle G, Orkin C, Fisher M, Anderson J, Dhar J, Wang MH, Ewan J. Switching from Kivexa + efavirenz to Atripla reduces total cholesterol in hypercholesterolemic subjects: final results of a 24-week, randomized study. J Int AIDS Soc 2010. [PMCID: PMC3113087 DOI: 10.1186/1758-2652-13-s4-p80] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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30
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Yang YX, Guo J, Yoon SY, Jin Z, Choi JY, Piao XS, Kim BW, Ohh SJ, Wang MH, Chae BJ. Early energy and protein reduction: effects on growth, blood profiles and expression of genes related to protein and fat metabolism in broilers. Br Poult Sci 2009; 50:218-27. [PMID: 19373723 DOI: 10.1080/00071660902736706] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
1. A total of 320-d-old Ross broilers were used in a 6-week study to investigate the effects of feeding lower energy and protein diets from d 8 to 14 on growth performance, blood profiles, and gene expression of leptin and myostatin. 2. Broilers were randomly allotted to 4 treatments, each treatment applied to 4 pens with 20 birds in each. During first week, all the birds were fed on a common starter diet (13.4 MJ ME/kg, 230 g/kg CP and 11.0 g/kg lysine). The birds were then subjected to their respective treatment diets from d 8 to 14. Treatment diets comprised two ME levels, 13.4 and 12.0 MJ/kg, each with two levels of CP, 230 and 184 g/kg. This was followed by feeding common starter and finisher diets for the last 4 weeks. 3. Dietary protein reduction resulted in poor performance and feed efficiency while energy reduction resulted in poor feed efficiency between d 8 and 14. From d 14 to 42 birds previously fed diets lower in energy and protein showed similar body weight gain and feed intake to well-fed birds. Moreover from d 8 to 14, birds fed on energy and protein-reduced diets had lower nutrient metabolisability coefficients. 4. The blood urea nitrogen (BUN) and relative weights of heart and breast muscle were lower in birds fed protein-reduced diets while energy reduction resulted in lower plasma glucose, abdominal fat and intestinal weight at d 14. At d 42, birds fed on the protein-reduced diets had lower BUN, breast muscle weight and small intestine length, while feeding on the energy-reduced diets resulted in lower abdominal fat. 5. Upregulated myostatin mRNA expression in breast muscle and downregulation of leptin mRNA expression in abdominal fat were observed in birds fed on protein and energy-reduced diets, respectively. 6. In conclusion, early nutrient reduction affected growth performance and produced lesser abdominal fat in broilers. Moreover, early energy and/or protein reduction could change muscle and fat metabolism by regulating the expressions of myostatin and leptin.
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Affiliation(s)
- Y X Yang
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Republic of Korea
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31
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Yang YX, Guo J, Jin Z, Yoon SY, Choi JY, Piao XS, Wang MH, Ohh SJ, Kim BW, Chae BJ. Effects of metabolizable energy and lysine restrictions on growth performance, blood profiles, and expression of myostatin and leptin genes in broilers. Can J Anim Sci 2009. [DOI: 10.4141/cjas08042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
To investigate the effects of metabolizable energy and lysine restriction on performance, and gene expression of leptin and myostatin, three hundred twenty day-old Ross broiler chicks were randomly allotted to four treatments. Birds were subjected to their respective diets comprising two levels of ME (3200; 2880 kcal kg-1) and two levels of lysine (1.10; 0.88%) during days 8 to 21. The dietary crude protein levels were reduced with the proportion to the lysine levels, while ratios of essential amino acids relative to lysine were similar for all diets. During restriction, weight gain, breast muscle and abdominal fat yield were lower in birds fed lysine-restricted diets. Relative myostatin mRNA abundance was increased in breast muscle of lysine-restricted birds, while expression of leptin mRNA in abdominal fat was downregulated by energy and lysine restriction. During realimentation, birds previously fed with energy and/or lysine-restricted diets had comparable performance as birds fed unrestricted diets. At day 42, energy and lysine restriction increased relative myostatin mRNA expression in breast muscle and birds previously fed diet restricted in both energy and lysine had the highest relative myostatin mRNA expression (energy × lysine interaction, P < 0.001). The relative leptin mRNA abundance was significantly lower in birds previously fed energy-restricted diets. These results indicated that early energy and lysine restriction from day 8 to 21 exhibited growth compensation during realimentation. In addition, myostatin and leptin mRNA expression in breast muscle and abdominal fat were modulated by nutritional treatments and were closely associated with changes in breast muscle yield and abdominal fat deposition. Key words: Metabolizable energy, lysine, myostatin, leptin, broiler
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32
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Wang MH. The morphological and physiological properties of the genetic tumours from a Nicotiana interspecific hybrid. Tissue Cell 2008; 30:334-9. [PMID: 18627843 DOI: 10.1016/s0040-8166(98)80046-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/1997] [Accepted: 01/06/1998] [Indexed: 11/19/2022]
Abstract
Many plant tumours have been loosely referred to as genetic tumours when no obvious external cause was identifiable. In this study, the morphology of genetic tumours was detected by scanning electron microscopy (SEM) and the influence of exogenous phytohormones on genetic tumour growth was examined. Genetic tumours in Nicotiana hybrid were first observed in the hypocotyl area and later appeared from stems as a cluster complex. In vitro, genetic tumours were produced 5-6 days after explant treatment near each of the cut ends. The morphology of genetic tumours was investigated using SEM. Genetic tumours are mainly composed of epidermal cells surrounded by a well developed extracellular matrix (ECM), that is organized in a network linking surface cells. Globular structures containing several cells were formed from these clusters of epidermal cells. Vigorous tumourous growth from the leaf discs of the Nicotiana hybrid was obtained on medium supplemented with auxin and cytokinin at 0 to 10 muM, but 100 muM of auxin and cytokinin inhibited genetic tumour growth. Leaf discs treated with 10 muM cytokinin or auxin alone produced genetic tumours, but 10 muM cytokinin supplemented with 100 muM auxin stopped growth. Therefore genetic tumours are tissues that are, clearly, disturbed in endogenous hormone balance or have altered sensitivity to hormones and response to exogenous hormones.
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Palmeri ML, Wang MH, Dahl JJ, Frinkley KD, Nightingale KR. Quantifying hepatic shear modulus in vivo using acoustic radiation force. Ultrasound Med Biol 2008; 34:546-58. [PMID: 18222031 PMCID: PMC2362504 DOI: 10.1016/j.ultrasmedbio.2007.10.009] [Citation(s) in RCA: 410] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2007] [Revised: 09/09/2007] [Accepted: 10/12/2007] [Indexed: 05/02/2023]
Abstract
The speed at which shear waves propagate in tissue can be used to quantify the shear modulus of the tissue. As many groups have shown, shear waves can be generated within tissues using focused, impulsive, acoustic radiation force excitations, and the resulting displacement response can be ultrasonically tracked through time. The goals of the work herein are twofold: (i) to develop and validate an algorithm to quantify shear wave speed from radiation force-induced, ultrasonically-detected displacement data that is robust in the presence of poor displacement signal-to-noise ratio and (ii) to apply this algorithm to in vivo datasets acquired in human volunteers to demonstrate the clinical feasibility of using this method to quantify the shear modulus of liver tissue in longitudinal studies. The ultimate clinical application of this work is noninvasive quantification of liver stiffness in the setting of fibrosis and steatosis. In the proposed algorithm, time-to-peak displacement data in response to impulsive acoustic radiation force outside the region of excitation are used to characterize the shear wave speed of a material, which is used to reconstruct the material's shear modulus. The algorithm is developed and validated using finite element method simulations. By using this algorithm on simulated displacement fields, reconstructions for materials with shear moduli (mu) ranging from 1.3-5 kPa are accurate to within 0.3 kPa, whereas stiffer shear moduli ranging from 10-16 kPa are accurate to within 1.0 kPa. Ultrasonically tracking the displacement data, which introduces jitter in the displacement estimates, does not impede the use of this algorithm to reconstruct accurate shear moduli. By using in vivo data acquired intercostally in 20 volunteers with body mass indices ranging from normal to obese, liver shear moduli have been reconstructed between 0.9 and 3.0 kPa, with an average precision of +/-0.4 kPa. These reconstructed liver moduli are consistent with those reported in the literature (mu = 0.75-2.5 kPa) with a similar precision (+/-0.3 kPa). Repeated intercostal liver shear modulus reconstructions were performed on nine different days in two volunteers over a 105-day period, yielding an average shear modulus of 1.9 +/- 0.50 kPa (1.3-2.5 kPa) in the first volunteer and 1.8 +/- 0.4 kPa (1.1-3.0 kPa) in the second volunteer. The simulation and in vivo data to date demonstrate that this method is capable of generating accurate and repeatable liver stiffness measurements and appears promising as a clinical tool for quantifying liver stiffness.
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Affiliation(s)
- M L Palmeri
- Department of Biomedical Engineering, Duke University, Durham, NC, USA.
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Wang MH, Chang HP, Chao HC, Chou PJ, Kuo CC, Tsai HJ, Lee SY, Tam WM, Wang F. Quadruple-bend achromatic low emittance lattice studies. Rev Sci Instrum 2007; 78:055109. [PMID: 17552862 DOI: 10.1063/1.2740070] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
A quadruple-bend achromatic (QBA) cell, defined as a supercell made of two double-bend cells with different outer and inner dipole bend angles, is found to provide a factor of 2 in lowering the beam emittance relative to the more conventional double-bend achromat. The ratio of bending angles of the inner dipoles to that of the outer dipoles is numerically found to be about 1.5-1.6 for an optimal low beam emittance in the isomagnetic condition. The QBA lattice provides an advantage over the double-bend achromat or the double-bend nonachromat in performance by providing a small natural beam emittance and some zero-dispersion straight sections. A lattice with 12 QBA cells and a preliminary dynamic aperture study serves as an example.
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Affiliation(s)
- M H Wang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
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Hu XH, Wang MH, Tan T, Li JR, Yang H, Leach L, Zhang RM, Luo ZW. Genetic dissection of ethanol tolerance in the budding yeast Saccharomyces cerevisiae. Genetics 2006; 175:1479-87. [PMID: 17194785 PMCID: PMC1840089 DOI: 10.1534/genetics.106.065292] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.1] [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: 11/18/2022] Open
Abstract
Uncovering genetic control of variation in ethanol tolerance in natural populations of yeast Saccharomyces cerevisiae is essential for understanding the evolution of fermentation, the dominant lifestyle of the species, and for improving efficiency of selection for strains with high ethanol tolerance, a character of great economic value for the brewing and biofuel industries. To date, as many as 251 genes have been predicted to be involved in influencing this character. Candidacy of these genes was determined from a tested phenotypic effect following gene knockout, from an induced change in gene function under an ethanol stress condition, or by mutagenesis. This article represents the first genomics approach for dissecting genetic variation in ethanol tolerance between two yeast strains with a highly divergent trait phenotype. We developed a simple but reliable experimental protocol for scoring the phenotype and a set of STR/SNP markers evenly covering the whole genome. We created a mapping population comprising 319 segregants from crossing the parental strains. On the basis of the data sets, we find that the tolerance trait has a high heritability and that additive genetic variance dominates genetic variation of the trait. Segregation at five QTL detected has explained approximately 50% of phenotypic variation; in particular, the major QTL mapped on yeast chromosome 9 has accounted for a quarter of the phenotypic variation. We integrated the QTL analysis with the predicted candidacy of ethanol resistance genes and found that only a few of these candidates fall in the QTL regions.
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Affiliation(s)
- X H Hu
- Laboratory of Population and Quantitative Genetics, Department of Biostatistics, State Key Laboratory of Genetic Engineering, Institute of Biomedical Sciences, School of Life Sciences, Fudan University, Shanghai 200433, China
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36
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Chen LK, Lin CJ, Huang CH, Wang MH, Lin PL, Lee CN, Sun WZ. The effects of continuous epidural analgesia on Doppler velocimetry of uterine arteries during different periods of labour analgesia. Br J Anaesth 2006; 96:226-30. [PMID: 16377645 DOI: 10.1093/bja/aei311] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [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: 11/13/2022] Open
Abstract
BACKGROUND The transient effects of epidural bupivacaine 0.25-0.5% on the Doppler velocimetry of umbilical and uterine arteries had been reported, but the effects of continuous lower dose epidural bupivacaine (0.05-0.1%) infusion for labour analgesia have never been reported. In this study, we evaluated the effects of continuous epidural bupivacaine 0.075% on the Doppler velocimetry of uterine arteries. METHODS Twenty pregnant women for labour analgesia received continuous epidural bupivacaine 0.075% infusion. We used a 4-MHz continuous-wave Doppler probe (Multigon 500A) with a 200 Hz thump filter to detect uterine blood flow velocity. We recorded the velocimetry data for uterine relaxation and contraction during five time periods: pre-epidural insertion, 1, 2, and 4 h post-epidural infusion, and after delivery of fetus. RESULTS Our data showed that the velocimetric indices of uterine vascular resistance were significantly increased 1, 2, and 4 h after epidural infusion when compared with the pre-epidural level; these returned to the baseline after delivery. CONCLUSION Continuous epidural analgesia with bupivacaine 0.075% increases the resistance of uterine artery and therefore possibly reduces the uterine blood flow.
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Affiliation(s)
- L K Chen
- Department of Anesthesiology, National Taiwan University Hospital, College of Medicine, Taipei, Taiwan
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Zhu X, Wang MH, Qiu R, Liu L, Dong Z, Tang G. The synergetic effects of two CCAAT boxes in Aspergillus niger glaA gene promoter on activation of PglaA transcription. ACTA ACUST UNITED AC 2004; 47:139-47. [PMID: 15379246 DOI: 10.1360/03yc0097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 11/09/2022]
Abstract
EMSA and footprinting analyses have revealed that the -489-- -414 bp and the -390-- -345 bp (designated DC and PC respectively) upstream of the Aspergillus nigerT21 glaA gene were bound by one protein factor in the A. nigerT21 whole cell extract. Both DC and PC contained CCAAT pentanucleotides. The functions of DC and PC in regulation of expression of glucoamylase (GLA) were studied. CCAAT pentanucleotides were replaced with CGTAA and the mutated DNA fragments DCm and PCm lost the binding activities of protein factors in vitro. In vivo when either DC or PC was mutated or the relative orientations between them were changed on the PglaA, the transcriptional activity of PglaA decreased to a basal level. Introduction of multi-copies of DC into the original site at the PglaA in A. nigerT21 decreased the expression of endogenous GLA expression and the exogenous reporter E. coli uidA gene introduced under the PglaA promoter, while having no effect on the uidA gene under the control of PgpdA. EMSA revealed that the levels of the specific DNA-binding protein factors in the transformants maintained the same meaning that introduction of multi-copies of DC caused the titration effect. AnghapC gene was cloned from A. nigerT21 cDNA and introduced into the DC multi-copied strains. The expression of AnghapC improved the expression of the endogenous GLA and the exogenous gene controlled by PglaA. These results showed that both the CCAAT pentanucleotides were necessary for DC and PC binding to the protein factors, and the simultaneous binding of DC and PC to the protein was necessary for promoting the transcriptional activity of PglaA. AngHapC was the specific positive trans-acting protein factor binding to DC.
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Affiliation(s)
- Xingguo Zhu
- Institute of Microbiology, Chinese Academy of Sciences, Beijing 100080, China
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38
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Wang MH, Li SH, Qiao ZX. [Clinical significance of detection of serum tumor necrosis factor-alpha in children with cerebral cysticercosis]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 19:124. [PMID: 12572007] [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: 02/28/2023]
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Abstract
In this paper, a novel extension neural network (ENN) is proposed. This new neural network is a combination of extension theory and neural network. It uses an extension distance (ED) to measure the similarity between data and cluster center. The learning speed of the proposed ENN is shown to be faster than the traditional neural networks and other fuzzy classification methods. Moreover, the new scheme has been proved to have high accuracy and less memory consumption. Experimental results from two different examples verify the effectiveness and applicability of the proposed work.
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Affiliation(s)
- M H Wang
- Department of Electrical Engineering, National Chin-Yi Institute of Technology, 35, 215 Lane, Sec. 1, Chung Shan Road, Taiping, Taichung, Taiwan, ROC.
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Lin TY, Chiu CH, Lin PY, Wang MH, Su LH, Lin TY. Short-term ceftriaxone therapy for treatment of severe non-typhoidal Salmonella enterocolitis. Acta Paediatr 2003; 92:537-40. [PMID: 12839280] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
AIM To evaluate the clinical efficacy of a short-course ceftriaxone therapy in the treatment of paediatric patients with severe non-typhoidal Salmonella enterocolitis. METHODS During a 1 y period, all paediatric patients who were suspected having Salmonella enterocolitis by the presentation of bloody and/or mucoid diarrhoea with or without fever were eligible for the study. Patients with either negative stool cultures or bacteraemia were excluded. Severe enterocolitis was defined as a bloody and/or mucoid diarrhoea associated with high fever persisting for longer than 48 h and signs of moderate or severe dehydration. The patients with severe enterocolitis were assigned to treatment with ceftriaxone (50 mg kg(-1) d(-1)) for 3-5 d, while the rest were given supportive treatment only. Before treatment all study patients received blood testing for white blood cell (WBC) count, C-reactive protein (CRP) level and blood culture. The duration of the fevers was recorded. Patients were followed up after clinical recovery for the possibility of relapse. RESULTS Seventy-three patients with culture-confirmed Salmonella enterocolitis without bacteraemia were analysed. The duration of fever was longer in severe cases who were treated with ceftriaxone than those who were not. However, rapid defervescene was found after short-course ceftriaxone therapy in those patients with severe enterocolitis. CRP was significantly higher in severe cases. There was no significant difference in the WBC count between the two groups of patients. No relapse was found in these patients. CONCLUSION High CRP, prolonged high fever and signs of moderate or severe dehydration appear appropriate to define severe cases of Salmonella enterocolitis. Short-course ceftriaxone therapy is clinically beneficial to these patients. Neither clinical nor microbiological relapse was seen after therapy.
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Affiliation(s)
- T Y Lin
- Division of Paediatric Infectious Diseases, Department of Paediatrics, Chang Gung Children's Hospital, Kweishan, Taoyuan, Taiwan
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Zhang F, Wang MH, Krishna UM, Falck JR, Laniado-Schwartzman M, Nasjletti A. Modulation by 20-HETE of phenylephrine-induced mesenteric artery contraction in spontaneously hypertensive and Wistar-Kyoto rats. Hypertension 2001; 38:1311-5. [PMID: 11751709 DOI: 10.1161/hy1201.096116] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Small mesenteric arteries of spontaneously hypertensive (SHR) and Wistar-Kyoto rats (WKY) were compared for the production of 20-HETE and the effects of 20-HETE and N-methylsulfonyl-12,12-dibromododec-11-enamide (DDMS, 30 micromol/L), a 20-HETE synthesis inhibitor, on contractile responsiveness to phenylephrine (0.1 to 50.0 micromol/L). 20-HETE production was higher in vessels of SHR compared with WKY (1.34+/-0.16 versus 0.27+/-0.09 pmol/mg tissue, P<0.05). Phenylephrine elicited concentration-dependent vascular contraction; the R(max) was similar in vessels of SHR and WKY, but the former were more sensitive as denoted by the lower EC(50) (1.10+/-0.14 versus 1.89+/-0.33 micromol/L, P<0.05). DDMS caused a rightward shift in the concentration-response curve to phenylephrine, increasing (P<0.05) the EC(50) by 258% and 134% in vessels of SHR and WKY, respectively. In contrast, in DDMS-treated vessels, 20-HETE (0.01 to 10.0 micromol/L) caused a leftward shift in the phenylephrine concentration-response curve, decreasing (P<0.05) the EC(50) without affecting the R(max). Importantly, the minimal concentration of 20-HETE that decreased the EC(50) of phenylephrine was much smaller in vessels of SHR that of WKY (0.01 versus 1.0 micromol/L). We conclude that 20-HETE increases the sensitivity of mesenteric arterial vessels to phenylephrine, vessels of SHR are more sensitive to this action of the eicosanoid than vessels of WKY, and vessels of SHR produce more 20-HETE than do vessels of WKY. Hence, 20-HETE of vascular origin may be a determinant of the increased reactivity to constrictor agonists in the vasculature of SHR.
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Affiliation(s)
- F Zhang
- Department of Pharmacology, New York Medical College, Valhalla 10595, USA.
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Su YC, Wang MH, Wu MF. Cutaneous B cell lymphoma in a Mongolian gerbil (Meriones unguiculatus). Contemp Top Lab Anim Sci 2001; 40:53-6. [PMID: 11560407] [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: 02/21/2023]
Abstract
A mass was noticed on the right mandible of an aged male Mongolian gerbil. Because of rapid enlargement of the mass, the animal was euthanized and submitted for pathology. The mass was firm, pink in color, 15 mm in diameter, and tightly adherent to adjacent tissues. Staining with hematoxylin and eosin revealed that the mass was a lymphoid tumor. Neoplastic cells had a large, round, dense nuclei and little cytoplasm. The tumor contained numerous mitotic figures. Immunohistochemical stains showed that the neoplastic cells expressed CD19 and IgM but lacked CD3 and CD5. Flow cytometric analysis showed that the neoplastic cells were positive for B220, IgG, and CD40. We concluded that the tumor was a primary cutaneous B cell lymphoma. In addition, the antibodies we used for the present diagnosis were anti-mouse reagents; therefore, they also were useful for subtyping gerbil lymphoid cells.
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Affiliation(s)
- Y C Su
- Laboratory Animal Center, College of Medicine, National Taiwan University, No. 1, Sec. 1, Jen-Ai Rd., Taipei, Taiwan, 100, Republic of China
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Wang MH, Berisso MC, Christian DC, Félix J, Gara A, Gottschalk E, Gutiérrez G, Hartouni EP, Knapp BC, Kreisler MN, Lee S, Markianos K, Moreno G, Reyes MA, Sosa M, Wehmann A, Wesson D. Diffractively produced charm final states in 800-GeV/c pp collisions. Phys Rev Lett 2001; 87:082002. [PMID: 11497936 DOI: 10.1103/physrevlett.87.082002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2000] [Indexed: 05/23/2023]
Abstract
We report the first observation of diffractively produced open charm in 800-GeV/c pp collisions of the type pp-->pD*X. We measure cross sections of sigma(diff)(D*+) = (0.185+/-0.044+/-0.054) (mu)b and sigma(diff)(D(*-)) = (0.174+/-0.034+/-0.029) (mu)b. Our measurements are based on 4.3x10(9) events recorded by FNAL E690 in the fixed-target run of 1991. We compare our results with previous fixed-target charm experiments.
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Affiliation(s)
- M H Wang
- University of Massachusetts, Amherst, 01003, USA
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Waltz SE, Eaton L, Toney-Earley K, Hess KA, Peace BE, Ihlendorf JR, Wang MH, Kaestner KH, Degen SJ. Ron-mediated cytoplasmic signaling is dispensable for viability but is required to limit inflammatory responses. J Clin Invest 2001; 108:567-76. [PMID: 11518730 PMCID: PMC209396 DOI: 10.1172/jci11881] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Ron receptor activation induces numerous cellular responses in vitro, including proliferation, dissociation, and migration. Ron is thought to be involved in blood cell development in vivo, as well as in many aspects of the immune response including macrophage activation, antigen presentation, and nitric oxide regulation. In previous studies to determine the function of Ron in vivo, mice were generated with a targeted deletion of the extracellular and transmembrane regions of this gene. Mice homologous for this deletion appear to die early during embryonic development. To ascertain the in vivo function of Ron in more detail, we have generated mice with a germline ablation of the tyrosine kinase domain. Strikingly, our studies indicate that this domain of Ron, and therefore Ron cytoplasmic signaling, is not essential for embryonic development. While mice deficient in this domain are overtly normal, mice lacking Ron signaling have an altered ability to regulate nitric oxide levels and, in addition, have enhanced tissue damage following acute and cell-mediated inflammatory responses.
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MESH Headings
- Animals
- CHO Cells
- Cells, Cultured
- Cricetinae
- Cricetulus
- Dermatitis, Allergic Contact/etiology
- Dermatitis, Allergic Contact/immunology
- Dermatitis, Allergic Contact/pathology
- Dermatitis, Contact/etiology
- Dermatitis, Contact/immunology
- Dermatitis, Contact/pathology
- Dinitrofluorobenzene/toxicity
- Embryonic and Fetal Development/physiology
- Female
- Genes, Lethal
- Growth Substances/pharmacology
- Growth Substances/physiology
- Hepatocyte Growth Factor
- Inflammation/etiology
- Inflammation/metabolism
- Irritants/toxicity
- Macrophage Activation
- Macrophages, Peritoneal/physiology
- Mice
- Mice, Knockout
- Nitric Oxide/metabolism
- Organ Specificity
- Ovary/metabolism
- Ovary/pathology
- Phenol/toxicity
- Phosphorylation
- Phosphotyrosine/biosynthesis
- Protein Processing, Post-Translational/genetics
- Protein Structure, Tertiary
- Proto-Oncogene Proteins
- Receptor Protein-Tyrosine Kinases/chemistry
- Receptor Protein-Tyrosine Kinases/drug effects
- Receptor Protein-Tyrosine Kinases/genetics
- Receptor Protein-Tyrosine Kinases/physiology
- Receptors, Cell Surface/chemistry
- Receptors, Cell Surface/drug effects
- Receptors, Cell Surface/genetics
- Receptors, Cell Surface/physiology
- Signal Transduction
- Single-Blind Method
- Stress, Physiological/complications
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Affiliation(s)
- S E Waltz
- Division of Developmental Biology, Children's Hospital Research Foundation, Cincinnati, Ohio 45229-3039, USA.
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Casado E, Gomez-Navarro J, Yamamoto M, Adachi Y, Coolidge CJ, Arafat WO, Barker SD, Wang MH, Mahasreshti PJ, Hemminki A, Gonzalez-Baron M, Barnes MN, Pustilnik TB, Siegal GP, Alvarez RD, Curiel DT. Strategies to accomplish targeted expression of transgenes in ovarian cancer for molecular therapeutic applications. Clin Cancer Res 2001; 7:2496-504. [PMID: 11489832] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
PURPOSE The purpose of the study was to determine the capability of the midkine (MK) and cycooxygenase-2 (cox-2) gene promoter regions to function as tumor-specific promoters for use in targeted gene therapy of ovarian cancer. EXPERIMENTAL DESIGN Established and primary ovarian cancer and mesothelial cells were transduced by adenoviral vectors containing a reporter or thymidine kinase gene expressed under the control of the MK, cox-2, or cytomegalovirus (CMV) promoters. SCID or C57BL/6 mice were injected i.p. with these same vectors. In vitro reporter gene expression and cellular cytotoxicity was determined using luciferase and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays, respectively. Acute toxicity in vivo was assessed by histological evaluation of harvested tissues. RESULTS Consistent activation of the MK and cox-2 promoters was noted in all of the ovarian cancer cell lines in addition to primary ovarian cancer cells. In contrast, reduced reporter activity was reported in mesothelial cells transduced with adenoviruses containing the test promoters, which was especially apparent for the cox-2 promoter. Additionally, the cox-2 promoter exhibited significantly lower reporter gene levels in liver and peritoneum than the control promoter in in vivo experiments. Tumor-cell killing induced by Adcox-2 MTK was comparable to that observed with AdCMVTK. However, a clear differential toxicity pattern was observed in favor of animals treated with Adcox-2 MTK when compared with controls. CONCLUSIONS These data clearly demonstrate that the transcriptional control afforded by the cox-2 promoter is tumor-specific and is able to mitigate associated toxicity in normal tissue while maintaining therapeutic efficacy in the context of an ovarian cancer molecular chemotherapeutic approach.
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Affiliation(s)
- E Casado
- Division of Human Gene Therapy, Department of Medicine, 1824 Sixth Avenue South, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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Abstract
BACKGROUND AND STUDY AIMS Little is known about the colonoscopic manifestation of colorectal lymphoma. This article describes the use of colonoscopy for diagnosis of primary colorectal lymphoma. PATIENTS AND METHODS We analyzed colonoscopic findings in 13 retrospectively collected cases of primary colorectal lymphoma diagnosed between 1990 and 1999 at our hospital. RESULTS The primary colorectal tymphomas were distinguished into three colonoscopic types: a) the mucosal type, which included six lymphomas (46%), which were classified into two subtypes, erosive (two lymphomas) and ulcerative (four tymphomas); b) the polypoid type, which included three tymphomas (23%); and c) the massive type, which included four (31%). The proportion of patients with T-cell lineage lymphoma (5 of 12, 42%) was higher than in previous studies. Three cases were diagnosed as enteropathy-associated T-cell (EAT)-like lymphoma: one presenting with multicentric ulcerations, one as a massive type and another as a polypoid type. Of those with B-cell lineage lymphoma (7 of 12, 58%), three presented as massive type, two as polypoid type and two as erosive subtype. CONCLUSIONS Based on the analysis of colonoscopic records, we have proposed three main types of primary colorectal lymphoma. An unusually high proportion of T-cell lineage lymphomas was noted, but as the number of cases was low, further study is still needed for confirmation.
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Affiliation(s)
- M H Wang
- Dept. of Internal Medicine, Far Eastern Memorial Hospital, Taipei, Taiwan
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Mahasreshti PJ, Navarro JG, Kataram M, Wang MH, Carey D, Siegal GP, Barnes MN, Nettelbeck DM, Alvarez RD, Hemminki A, Curiel DT. Adenovirus-mediated soluble FLT-1 gene therapy for ovarian carcinoma. Clin Cancer Res 2001; 7:2057-66. [PMID: 11448924] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
PURPOSE We hypothesized that adenovirus-mediated soluble fms-like tyrosine kinase receptor (sFLT-1) gene therapy can inhibit the ovarian tumor growth and increase survival of mice in the context of ovarian carcinoma. EXPERIMENTAL DESIGN We constructed an infectivity-enhanced recombinant adenovirus (AdRGDGFPsFLT-1) expressing soluble FLT-1 and green fluorescent protein (GFP). An adenovirus AdRGDGFP expressing GFP alone was used as control. The functional validation of adenovirus-mediated sFLT-1 was determined by an in vitro human umbilical vein endothelial cell proliferation inhibition assay. To evaluate the therapeutic potential of adenovirus-expressed sFLT-1 to inhibit the growth of ovarian tumors and to increase the survival duration of mice with ovarian tumors, two tumor models were used. First, SKOV3.ip1 ovarian carcinoma cells were infected ex vivo with either AdRGDGFPsFLT-1 or AdRGDGFP or uninfected and then inoculated s.c. into BALB/c nude mice, and tumor growth was monitored. Second, SKOV3.ip1 cells were inoculated i.p. into CB17 SCID mice and then treated with two doses of either AdRGDGFPsFLT-1 or AdRGDGFP or with PBS on days 1 and 14 after inoculation of cells, and the survival duration was monitored. RESULTS Treatment with adenovirus-expressed sFLT-1 significantly inhibited the proliferation of human umbilical vein endothelial cells. The s.c. tumor nodules in mice derived from cells infected with AdRGDGFPsFLT-1 were significantly smaller than those infected with either AdRGDGFP or uninfected. In addition, i.p. administration of the AdRGDGFPsFLT-1 resulted in a significant increase in the survival times of mice compared with AdRGDGFP- or PBS-treated mice. CONCLUSIONS Our results suggest that adenovirus-mediated sFLT-1 gene therapy can effectively inhibit ovarian tumor growth and increase survival in a murine model of ovarian carcinoma.
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Affiliation(s)
- P J Mahasreshti
- The Gene Therapy Center, University of Alabama at Birmingham, Birmingham, Alabama 35233, USA
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Shin JS, Wang MH, Hwang SW, Cho H, Cho SY, Kwon MJ, Lee SY, Oh U. Differences in sensitivity of vanilloid receptor 1 transfected to human embryonic kidney cells and capsaicin-activated channels in cultured rat dorsal root ganglion neurons to capsaicin receptor agonists. Neurosci Lett 2001; 299:135-9. [PMID: 11166956 DOI: 10.1016/s0304-3940(00)01777-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [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: 11/17/2022]
Abstract
Heterologously expressed vanilloid receptor 1 (VR1), a cloned cDNA encoding for capsaicin (CAP)-sensitive currents, resembles the native CAP channels in cultured sensory neurons in channel property. But, the pharmacological profile of VR1 to various CAP analogs is not known. The stable expression of VR1 in human embryonic kidney (HEK) cells was generated and confirmed by reverse transcription-polymerase chain reaction and Western blots. VR1 expressed in HEK cells retained single-channel properties similar to those of the native channels. When concentration-response relationships were compared, CAP and DA-5018.HCl, a synthetic analog of CAP, exhibited a greater potency in activating VR1 than the native channels in sensory neurons. In contrast, resiniferatoxin and its analog, phorbol 12-phenylacetate 13-acetate 20-homovanillate, was more potent in activating the CAP-activated channels in cultured sensory neurons than VR1. Thus, the difference in pharmacological profiles of VR1 and the native channels suggests the possible presence of subtypes of the CAP receptor or regulatory mechanisms associated with VR1.
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MESH Headings
- Analgesics, Non-Narcotic/pharmacology
- Animals
- Animals, Newborn
- Capsaicin/analogs & derivatives
- Capsaicin/pharmacology
- Cells, Cultured/cytology
- Cells, Cultured/drug effects
- Cells, Cultured/metabolism
- Diterpenes/pharmacology
- Dose-Response Relationship, Drug
- Ganglia, Spinal/cytology
- Ganglia, Spinal/drug effects
- Ganglia, Spinal/metabolism
- Gene Expression Regulation/physiology
- Humans
- Ion Channels/drug effects
- Ion Channels/metabolism
- Kidney/cytology
- Kidney/drug effects
- Kidney/metabolism
- Neurons, Afferent/cytology
- Neurons, Afferent/drug effects
- Neurons, Afferent/metabolism
- Phorbol Esters/pharmacology
- Rats
- Receptors, Drug/drug effects
- Receptors, Drug/genetics
- Receptors, Drug/metabolism
- TRPV Cation Channels
- Transfection
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Affiliation(s)
- J S Shin
- The Sensory Research Group, National Creative Research Initiatives, Seoul National University, College of Pharmacy, Kwanak-Gu, Shinlim San 56-1, Seoul 151-742, South Korea
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Wang MH, Zhang F, Marji J, Zand BA, Nasjletti A, Laniado-Schwartzman M. CYP4A1 antisense oligonucleotide reduces mesenteric vascular reactivity and blood pressure in SHR. Am J Physiol Regul Integr Comp Physiol 2001; 280:R255-61. [PMID: 11124159 DOI: 10.1152/ajpregu.2001.280.1.r255] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The cytochrome P-450 4A (CYP4A)-derived arachidonic acid metabolite 20-hydroxyeicosatetraenoic acid (20-HETE) affects renal tubular and vascular functions and has been implicated in the control of arterial pressure. We examined the effect of antisense oligonucleotide (ODN) to CYP4A1, the low K(m) arachidonic acid omega-hydroxylating isoform, on vascular 20-HETE synthesis, vascular reactivity, and blood pressure in the spontaneously hypertensive rat (SHR). Administration of CYP4A1 antisense ODN decreased mean arterial blood pressure from 137 +/- 3 to 121 +/- 4 mmHg (P < 0.05) after 5 days of treatment, whereas treatment with scrambled antisense ODN had no effect. Treatment with CYP4A1 antisense ODN reduced the level of CYP4A-immunoreactive proteins along with 20-HETE synthesis in mesenteric arterial vessels. Mesenteric arteries from rats treated with antisense ODN exhibited decreased sensitivity to the constrictor action of phenylephrine (EC(50) 0.69 +/- 0.17 vs. 1.77 +/- 0.40 microM). Likewise, mesenteric arterioles from antisense ODN-treated rats revealed attenuation of myogenic constrictor responses to increases of transmural pressure. The decreased vascular reactivity and myogenic responses were reversible with the addition of 20-HETE. These data suggest that CYP4A1-derived 20-HETE facilitates myogenic constrictor responses in the mesenteric microcirculation and contributes to pressor mechanisms in SHR.
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Affiliation(s)
- M H Wang
- Department of Pharmacology, New York Medical College, Valhalla, New York 10595, USA
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Kim SA, Kwak JM, Jae SK, Wang MH, Nam HG. Overexpression of the AtGluR2 gene encoding an Arabidopsis homolog of mammalian glutamate receptors impairs calcium utilization and sensitivity to ionic stress in transgenic plants. Plant Cell Physiol 2001; 42:74-84. [PMID: 11158446 DOI: 10.1093/pcp/pce008] [Citation(s) in RCA: 111] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
We have identified a homolog of the mammalian ionotropic glutamate receptor genes in Arabidopsis thaliana (AtGluR2). This gene was found to alter Ca2+ utilization when overexpressed in A. thaliana. These transgenic plants displayed symptoms of Ca2+ deficiency, including browning and death of the shoot apex, necrosis of leaf tips, and deformation of leaves. Supplementation with Ca2+ alleviated these phenotypes. Overall levels of Ca2+ in tissues of control plants were not significantly different from those of transgenic plants, suggesting that overexpression of the AtGluR2 gene did not affect Ca2+ uptake. However, the relative growth yield as a function of Ca2+ levels revealed that the critical deficiency content of Ca2+ in transgenic plants was three times higher than that of control plants. The transgenic plants also exhibited hypersensitivity to Na+ and K+ ionic stresses. The ion hypersensitivity was ameliorated by supplementation with Ca2+. The results showed that overexpression of the AtGluR2 gene caused reduced efficiency of Ca2+ utilization in the transgenic plants. The promoter of the AtGluR2 gene was active in vascular tissues, particularly in cells adjacent to the conducting vessels. This suggests that AtGluR2 encodes a functional channel that unloads Ca2+ from the xylem vessels. The results together suggest that appropriate expression of the AtGluR2 protein may play critical roles in Ca2+ nutrition by controlling the ion allocation among different Ca2+ sinks both during normal development and during adaptation to ionic stresses.
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Affiliation(s)
- S A Kim
- Division of Molecular and Life Sciences, Pohang University of Science and Technology, Hyoja Dong, Pohang, Kyungbuk 790-784, Republic of Korea
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