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Yu X, Pei W, Xu WW, Zhao Y, Su Y, Zhao J. Core-Packing-Related Vibrational Properties of Thiol-Protected Gold Nanoclusters and Their Excited-State Behavior. Inorg Chem 2023. [PMID: 38009722 DOI: 10.1021/acs.inorgchem.3c03482] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Thiolate-protected gold nanoclusters, with unique nuclearity- and structure-dependent properties, have been extensively used in energy conversion and catalysis; however, the mystery between kernel structures and properties remains to be revealed. Here, the influence of core packing on the electronic structure, vibrational properties, and excited-state dynamics of four gold nanoclusters with various kernel structures is explored using density functional theory combined with time-domain nonadiabatic molecular dynamics simulations. We elucidate the correlation between the geometrical structure and excited-state dynamics of gold nanoclusters. The distinct carrier lifetimes of the four nanoclusters are attributed to various electron-phonon couplings arising from the different vibrational properties caused by core packing. We have identified specific phonon modes that participate in the electron-hole recombination dynamics, which are related to the gold core of nanoclusters. This study paints a physical picture from the geometric configuration, electronic structure, vibrational properties, and carrier lifetime of these nanoclusters, thereby facilitating their potential application in optoelectronic materials.
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Affiliation(s)
- Xueke Yu
- Key Laboratory of Materials Modification By Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China
| | - Wei Pei
- College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Jiangsu 225009, China
| | - Wen-Wu Xu
- Department of Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
| | - Yang Zhao
- Key Laboratory of Materials Modification By Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China
| | - Yan Su
- Key Laboratory of Materials Modification By Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China
| | - Jijun Zhao
- Key Laboratory of Materials Modification By Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China
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Wang H, He Q, Liu D, Deng XZ, Ma J, Xie LN, Sun ZL, Liu C, Zhao RR, Lu K, Chu XX, Gao N, Wei HC, Sun YH, Zhong YP, Xing LJ, Zhang HY, Zhang H, Xu WW, Li ZJ. [Efficacy and safety of bendamustine-rituximab combination therapy for newly diagnosed indolent B-cell non-Hodgkin's lymphoma and elderly mantle cell lymphoma: a multi-center prospective phase II clinical trial in China]. Zhonghua Xue Ye Xue Za Zhi 2023; 44:550-554. [PMID: 37749033 PMCID: PMC10509620 DOI: 10.3760/cma.j.issn.0253-2727.2023.07.004] [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: 12/12/2022] [Indexed: 09/27/2023]
Abstract
Objectives: This study aimed to assess the efficacy and safety of bendamustine in combination with rituximab (BR regimen) for the treatment of newly diagnosed indolent B-cell non-Hodgkin's lymphoma (B-iNHL) and elderly mantle cell lymphoma (eMCL) . Methods: From December 1, 2020 to September 10, 2022, a multi-center prospective study was conducted across ten Grade A tertiary hospitals in Shandong Province, China. The BR regimen was administered to evaluate its efficacy and safety in newly diagnosed B-iNHL and eMCL patients, and all completed at least four cycles of induction therapy. Results: The 72 enrolled patients with B-iNHL or MCL were aged 24-74 years, with a median age of 55 years. Eastern Cooperative Oncology Group (ECOG) performance status scores of 0-1 were observed in 76.4% of patients, while 23.6% had scores of 2. Disease distribution included follicular lymphoma (FL) (51.4% ), marginal zone lymphoma (MZL) (33.3% ), eMCL (11.1% ), and the unknown subtype (4.2% ). According to the Ann Arbor staging system, 16.7% and 65.3% of patients were diagnosed with stage Ⅲ and stage Ⅳ lymphomas, respectively. Following four cycles of BR induction therapy, the overall response rate was 98.6%, with a complete response (CR) rate of 83.3% and a partial response (PR) rate of 15.3%. Only one eMCL patient experienced disease progression during treatment, and only one FL patient experienced a relapse. Even when evaluated using CT alone, the CR rate was 63.9%, considering the differences between PET/CT and CT assessments. The median follow-up duration was 11 months (range: 4-22), with a PFS rate of 96.8% and an OS rate of 100.0%. The main hematologic adverse reactions included grade 3-4 leukopenia (27.8%, with febrile neutropenia observed in 8.3% of patients), grade 3-4 lymphopenia (23.6% ), grade 3-4 anemia (5.6% ), and grade 3-4 thrombocytopenia (4.2% ). The main non-hematologic adverse reactions such as fatigue, nausea/vomiting, rash, and infections occurred in less than 20.0% of patients. Conclusion: Within the scope of this clinical trial conducted in China, the BR regimen demonstrated efficacy and safety in treating newly diagnosed B-iNHL and eMCL patients.
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Affiliation(s)
- H Wang
- Department of Hematology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250000, China
| | - Q He
- Department of Hematology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250000, China
| | - D Liu
- Department of Hematology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250000, China
| | - X Z Deng
- Department of Hematology, Weihai Municipal Hospital, Weihai 264200, China
| | - J Ma
- Department of Hematology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250000, China
| | - L N Xie
- Department of Hematology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250000, China
| | - Z L Sun
- Department of Hematology, Jining First People's Hospital, Jining 272000, China
| | - C Liu
- Department of Hematology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250000, China
| | - R R Zhao
- Department of Hematology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250000, China
| | - K Lu
- Department of Hematology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250000, China
| | - X X Chu
- Department of Hematology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai 264000, China
| | - N Gao
- Department of Hematology, Binzhou Medical University Hospital, Binzhou 256600, China
| | - H C Wei
- Department of Hematology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250000, China
| | - Y H Sun
- Department of Hematology, Weifang People's Hospital, Weifang 261000, China
| | - Y P Zhong
- Department of Hematology, Qingdao Municipal Hospital, Qingdao 266000, China
| | - L J Xing
- Department of Hematology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250000, China
| | - H Y Zhang
- Department of Hematology, Linyi People's Hospital, Linyi 276000, China
| | - H Zhang
- Department of Hematology, Affiliated Hospital of Jining Medical University, Jining 272000, China
| | - W W Xu
- Department of Hematology, The First Affiliated Hospital of Shandong First Medical University, Jinan 250000, China
| | - Z J Li
- Department of Hematology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250000, China
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Zhang H, Xu WW, Chen CD, Ge CS, Zheng ZG, Duan CL, Xue GW, Cai YD, Zhang W, Wang L, Sun ZM, Li ZF, Du CL, Gao Y, Zhang JL. [A prospective study of position selection combined with autologous blood intrathoracic infusion in the treatment of postoperative persistent air leakage with an unexpanded lung]. Zhonghua Jie He He Hu Xi Za Zhi 2023; 46:404-407. [PMID: 36990705 DOI: 10.3760/cma.j.cn112147-20220705-00563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
We prospectively studied 17 patients with spontaneous pneumothorax or giant emphysematous bulla at Rizhao Hospital of Traditional Chinese Medicine from October 2020 to March 2022. All patients underwent thoracoscopic interventional therapy, had experienced continued air leakage for 3 days with closed thoracic drainage postoperatively, had an unexpanded lung on CT, and/or failed to intervention with position selection combined with intra-pleural thrombin injection(referred to as "position plus1.0"). They were all treated with position selection combined with autologous blood (100 ml) and thrombin (5 000 U) intra-pleural injection(referred to as "position plus 2.0").The success rate of the "position plus 2.0" intervention was 16/17, and the recurrence rate was 3/17. There were four cases of fever, four cases of pleural effusion, one case of empyema, and no other adverse reactions. This study has shown that the "position plus 2.0" intervention is safe, effective, and simple for patient with persistent air leakage failed to intervention with"position plus 1.0" after thoracoscopic treatment of pulmonary and pleural diseases related to bulla.
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Affiliation(s)
- H Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - W W Xu
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C D Chen
- Department of Respiratory Medicine, Rizhao People's Hospital, Rizhao 276800, China
| | - C S Ge
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Z G Zheng
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C L Duan
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - G W Xue
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Y D Cai
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - W Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - L Wang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Z M Sun
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Z F Li
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C L Du
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Y Gao
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - J L Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
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Li WX, Xie ZB, Xu J, Xia BC, Duan HJ, Song JH, Wang HL, Xu WW, Zhang Y, Fan H. [Analysis of enterovirus infection type among acute respiratory tract infection cases in Luohe City, Henan Province from 2017 to 2021]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:378-385. [PMID: 36655353 DOI: 10.3760/cma.j.cn112150-20221011-00985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Objective: To understand the infection status of Enterovirus (EV) in cases of acute respiratory infections (ARIs) in Luohe City, Henan Province from 2017 to 2021, and analyze the prevalence and type composition of EV in ARIs. Methods: From October 2017 to May 2021, pharyngeal swab samples were collected from 1 828 patients with ARIs in Luohe Central Hospital and the clinical epidemiological data of these cases were also collected. EV-positive samples were identified by Quantitative Real-time Polymerase Chain Reaction (qPCR). The 5'-untranslated region (5'UTR) was amplified by Reverse Transcription-Polymerase Chain Reaction (RT-PCR). The results of 5'UTR region were initially typed by Enterovirus Genotyping Tool Version 1.0. Based on the typing results, the full-length of VP1 region was amplified by RT-PCR. The EV typing was identified again by VP1 region. Results: Among 1 828 cases of ARIs, 56.7% (1 036) were males. The median (Q1, Q3) age was about 3 (1, 5) years. Patients under 5 years old accounted for 71.6% (1 309 cases). Among all cases, a total of 71 EV-positive samples were identified by qPCR, with a detection rate of 3.88% (71/1 828). The EV detection rates for men and women were 3.28% (34/1 036) and 4.67% (37/792), without statistically significant differences (χ2=2.32, P=0.14). The EV detection rates for 2 to <6 years, 6 months to <2 years, 6 to <10 years, and <6 months were 6.29% (48/763), 3.00% (18/600), 2.52% (4/159), and 1.67% (1/60) (χ2=27.91, P<0.001). The EV detection rate was 0.92% (3/326) in autumn and winter of 2017. The EV detection rates were 1.18% (6/508), 2.47% (12/485) and 8.31% (34/409) in each year from 2018 to 2020, with an increasing trend year by year(χ2trend=29.76, P<0.001). The main prevalent seasons were summer and autumn. The detection rate in spring of 2021 was 4.00% (4/100). A total of 12 types were identified and classified as CVA2, CVA4, CVA5, CVA6, CVA10, CVB3, CVB5, E5, E11, E30, PV-1, and EV-D68. The types of CVA2, CVA10, CVA6, and CVB3 were the dominant phenotypes. In 59 sample of EV typing, the main clinical manifestation was upper respiratory tract infection (36/59, 61.01%). The dominant types detected in upper respiratory tract infections were CVA10 (10/36, 27.78%), CVA6 (9/36, 25.00%) and CVB3 (8/36, 22.22%). The dominant type detected in lower respiratory tract infections was CVA2 (7/19, 36.84%). Conclusion: In Luohe City, Henan Province from 2017 to 2021, EV infection in ARIs cases has clear seasonal and age-specific patterns, and the dominant types of upper and lower respiratory tract infections are different.
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Affiliation(s)
- W X Li
- School of Public Health and Health Management, Shandong First Medical University/Shandong Academy of Medical Sciences, Jinan 250117, China NHC Key Laboratory of Medical Virology and Viral Diseases/National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - Z B Xie
- NHC Key Laboratory of Medical Virology and Viral Diseases/National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - J Xu
- Institute of Expanded Immunization Programme, Henan Provincial Center for Disease Control and Prevention, Zhengzhou 450016, China
| | - B C Xia
- NHC Key Laboratory of Medical Virology and Viral Diseases/National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - H J Duan
- School of Public Health and Health Management, Shandong First Medical University/Shandong Academy of Medical Sciences, Jinan 250117, China
| | - J H Song
- NHC Key Laboratory of Medical Virology and Viral Diseases/National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - H L Wang
- NHC Key Laboratory of Medical Virology and Viral Diseases/National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - W W Xu
- NHC Key Laboratory of Medical Virology and Viral Diseases/National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - Y Zhang
- NHC Key Laboratory of Medical Virology and Viral Diseases/National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - H Fan
- School of Public Health and Health Management, Shandong First Medical University/Shandong Academy of Medical Sciences, Jinan 250117, China
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Sun Y, Yu X, Liu P, Han W, Xu WW, Su Y, Zhao J. Isomerism effects in relaxation dynamics of Au 24(SR) 16thiolate-protected gold nanoclusters. Nanotechnology 2022; 34:105701. [PMID: 36537747 DOI: 10.1088/1361-6528/aca80d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
Understanding the excited state behavior of isomeric structures of thiolate-protected gold nanoclusters is still a challenging task. In this paper, based on grand unified model and ring model for describing thiolate-protected gold nanoclusters, we have predicted four isomers of Au24(SR)16nanoclusters. Density functional theory calculations show that the total energy of one of the predicted isomers is 0.1 eV lower in energy than previously crystallized isomer. The nonradiative relaxation dynamics simulations of Au24(SH)16isomers are performed to reveal the effects of structural isomerism on relaxation process of the lowest energy states, in which that most of the low-excited states consist of core states. In addition, crystallized isomer possesses the shorter e-h recombination time, whereas the most stable isomer has the longer recombination time, which may be attributed to the synergistic effect of nonadiabatic coupling and decoherence time. Our results could provide practical guidance to predict new gold nanoclusters for future experimental synthesis, and stimulate the exploration of atomic structures of same sized gold nanoclusters for photovoltaic and optoelectronic devices.
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Affiliation(s)
- Yuanze Sun
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, People's Republic of China
| | - Xueke Yu
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, People's Republic of China
| | - Pengye Liu
- Department of Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Wenhua Han
- Department of Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Wen-Wu Xu
- Department of Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Yan Su
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, People's Republic of China
| | - Jijun Zhao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, People's Republic of China
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Zhang H, Duan CL, Xue GW, Xu WW, Ge CS, Cai YD, Zheng ZG, Du CL, Gao Y, Zhang JL, Li ZF, Zhang W, Wang L. [Effectiveness and safety of medical glue assisted argon plasma coagulation union giant emphysematous bulla volume reduction via thoracoscope on the treatment of spontaneous pneumothorax with subpleural bullae]. Zhonghua Jie He He Hu Xi Za Zhi 2022; 45:1204-1208. [PMID: 36480851 DOI: 10.3760/cma.j.cn112147-20221014-00820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Objective: To evaluate the effectiveness and safety of a new treatment protocol that combined "medical glue assisted argon plasma coagulation"(hereinafter called "APC plus") and "giant emphysematous bulla volume reduction"(hereinafter called "one thoracoscope plus one needle") via medical thoracoscopy on the spontaneous pneumothorax patients whose chest high resolution CT (HRCT) showed multiple subpleural bullae (SPB) and at least one SPB≥4 cm in diameter. Methods: A retrospective analysis was performed on the clinical data of 46 cases of spontaneous pneumothorax with multiple SPB(at least one SPB≥4 cm in diameter), 42 males and 4 females, aged from 31 to 79 (68.5±10.3) years,from June 2018 to December 2021 in Rizhao Hospital of Traditional Chinese Medicine. The time of air leakage discontinuance, the disappearance rate and reduction degree of target subpleural blebs one week after operation, the degree of reduction and the incidence of postoperative complications were observed. Two-year follow-up after operation was carried out to assess the recurrence rate and its short- and long-term complications. Results: Among the 46 patients, SPB disappeared or nearly disappeared in 39 cases (84.78%), decreased in number or reduced in volume in 5 cases (10.87%), and remained unchanged in 2 cases (4.35%) after the intervention of "APC Plus"; 40 patients stopped leaking within 1 week and 6 cases stopped leaking over a week. Eleven patients finished the 3-year follow-up, 13 finished 2-year follow-up and 6 finished 1-year follow-up, with only 1 relapse. No serious complications occurred in all these 46 patients. Conclusion: "APC plus" combining with "one thoracoscope plus one needle" is safe and effective in the treatment of pneumothorax patients with multiple subpleural bullae of varying sizes.
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Affiliation(s)
- H Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C L Duan
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - G W Xue
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - W W Xu
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C S Ge
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Y D Cai
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Z G Zheng
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C L Du
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Y Gao
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - J L Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Z F Li
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - W Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - L Wang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
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Yu X, Sun Y, Xu WW, Fan J, Gao J, Jiang X, Su Y, Zhao J. Tuning photoelectron dynamic behavior of thiolate-protected MAu 24 nanoclusters via heteroatom substitution. Nanoscale Horiz 2022; 7:1192-1200. [PMID: 36039937 DOI: 10.1039/d2nh00281g] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Heteroatom substitution of gold nanoclusters enables precise tuning of their physicochemical properties at the single-atom level, which has a significant impact on the applications related to excited states including photovoltaics, photocatalysis and photo-luminescence. To this end, understanding the effect of metal exchange on the structures, electronic properties and photoexcited dynamic behavior of nanoclusters is imperative. Combining density functional theory with time-domain nonadiabatic molecular dynamics simulations, herein we explored the effect of metal replacement on the electronic and vibrational properties as well as excited-state dynamics of ligand-protected MAu24(SR)18 (M = Pd, Pt, Cd, and Hg) nanoclusters. At the atomistic level, we elucidate hot carrier relaxation and recombination dynamic behavior with various doping atoms. Such distinct excited-state behavior of MAu24(SR)18 nanoclusters is attributed to different energy gaps and electron-phonon coupling between the donor and acceptor energy levels, owing to the perturbation of nanoclusters by a single foreign atom. The specific phonon modes involved in excited-state dynamics have been identified, which are associated with the MAu12 core and ligand rings. This time-dependent excited-state dynamic study fills the gap between structure/composition and excited-state dynamic behavior of MAu24(SR)18 nanoclusters, which would stimulate the exploration of their applications in photoenergy storage and conversion.
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Affiliation(s)
- Xueke Yu
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
| | - Yuanze Sun
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
| | - Wen-Wu Xu
- Department of Physics, School of Physical Science and Technology (Ningbo University), Ningbo 315211, China
| | - Junyu Fan
- Department of Physics, (Taiyuan Normal University), Jinzhong 030619, China.
| | - Junfeng Gao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
| | - Xue Jiang
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
| | - Yan Su
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
| | - Jijun Zhao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China
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Zhu Z, Mao NY, Zhang Y, Xu WW. [Consideration on the emerging acute severe hepatitis cases with unknown etiology in children of some countries]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:679-681. [PMID: 35484645 DOI: 10.3760/cma.j.cn112150-20220427-00423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Since January 2022, acute severe hepatitis cases with unknown etiology in children have occurred in many countries in Europe and the United States, and 43.8% of the cases were positive for human adenovirus (HAdV), and some cases were identified as HAdV-41. However, more evidences including etiology, genomics, liver pathology, and immunohistochemistry are needed to determine the main cause of this outbreak. At present, due to the lack of systematic surveillance and research on hepatitis caused by HAdV infection, it is impossible to determine whether there are similar hepatitis cases occurred in China. It is urgent to carry out HAdV virolgocial surveillance based on clinical symptom, and potential risk of acute severe hepatitis should be studied as soon as possible according to the available relevant clinical, epidemiological and virological data, as well as risk factor information, which will provide scientific and technical support for the prevention and control of HAdV-related diseases.
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Affiliation(s)
- Z Zhu
- National Institute for Viral Diseases Control and Prevention, China CDC, NHC Key Laboratory of Medical Virology and Viral Diseases, WHO WPRO Regional Reference Measles/Rubella Laboratory, Beijing 102206, China
| | - N Y Mao
- National Institute for Viral Diseases Control and Prevention, China CDC, NHC Key Laboratory of Medical Virology and Viral Diseases, WHO WPRO Regional Reference Measles/Rubella Laboratory, Beijing 102206, China
| | - Y Zhang
- National Institute for Viral Diseases Control and Prevention, China CDC, NHC Key Laboratory of Medical Virology and Viral Diseases, WHO WPRO Regional Reference Measles/Rubella Laboratory, Beijing 102206, China
| | - W W Xu
- National Institute for Viral Diseases Control and Prevention, China CDC, NHC Key Laboratory of Medical Virology and Viral Diseases, WHO WPRO Regional Reference Measles/Rubella Laboratory, Beijing 102206, China
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Jiang J, Xu WW, Zhang Y, Zhu Z, Mao NY. [Advances on molecular typing methods and evolution of human parainfluenza virus]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:203-211. [PMID: 35078303 DOI: 10.3760/cma.j.cn112150-20211022-00983] [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: 06/14/2023]
Abstract
Human parainfluenza viruses (HPIVs) is one of the main causes of acute respiratory tract infections in children. HPIVs have been grouped into four serotypes (HPIV1~HPIV4) according to serological and genetic variation. Different serotypes of HPIVs have diverse clinical disease spectrum, epidemic characteristics and disease burden. Based on the nucleotide variation in structural protein genes, HPIVs can be further divided into distinct genotypes and subtypes with diverse temporal and spatial distribution features. The standard molecular typing methods are helpful to clarify the gene evolution and transmission patterns of HPIVs in the process of population transmission. However, the development of molecular epidemiology of HPIVs has been hindered by the lack of a standardized molecular typing method worldwide. Therefore, this study reviewed the viral characteristics, genome structure, existing genotyping methods and evolution of HPIVs, and screened the reference strains for molecular typing, so as to improve the understanding of gene characteristics and molecular typing of HPIVs, and provide an important scientific basis for the monitoring and research of molecular epidemiology of HPIVs in China.
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Affiliation(s)
- J Jiang
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - W W Xu
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - Y Zhang
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - Z Zhu
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - N Y Mao
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
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Wei XY, Zhang ZZ, Xie T, Xie YS, Sun Y, Yang T, Xu WW, Liu HR, Li W, Yu DH. Pharmacokinetics Study of Rabdosia Rubescens Drop Pills Based on UPLC-MS/MS. CURR PHARM ANAL 2021. [DOI: 10.2174/1573412918666211230095348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Rabdosia rubescens drop pills have the effects of clearing away heat and toxin, detumescence, relieving pain.
Objective:
A simple and sensitive method for simultaneous determination of oridonin, ponicidin, and rosmarinic acid in rat plasma was developed based on ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS).
Methods:
Chromatographic separation was performed on a Waters ACQUITY UPLC BEH C18 column (2.1 × 100 mm, 1.7 µm) with a mobile phase consisting of water containing 0.2% formic acid (mobile phase A) and methanol (mobile phase B) at a flow rate of 0.3 mL/min over a total run time of 3.8 min. All analytes were measured with optimized multiple reaction monitoring (MRM) in positive and negative ion ESI mode.
Results:
The transitions of oridonin, ponicidin, rosmarinic acid, diphenhydramine, and chloramphenicol were 365.3→347.3, 363.3→345.2, 359.0→160.9, 256.0→167.2, and 321.1→151.9, respectively. The linear ranges were 1-256 ng/mL for ponicidin and rosmarinic acid and 2-512 ng/mL for oridonin. The validated method wasstable and reliable. There was no significant difference in the half-life (t1/2) of the three analytes at three doses. The area under the curve (AUC0-t) and peak concentration (Cmax) of the three analytes decreased linearly in each dose range, and the linear correlation R2 of each analyte under the three doses was greater than 0.95.
Conclusion:
This method was successfully applied to pharmacokinetic studies of oridonin, ponicidin, and rosmarinic acid in rat plasma after intragastric administration of Rabdosia rubescens drop pills.
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Affiliation(s)
- Xi-Yu Wei
- North China University of Science and Technology, Hebei, Tangshan 063210, P.R. China
| | - Zhen-Zhen Zhang
- North China University of Science and Technology, Hebei, Tangshan 063210, P.R. China
| | - Tao Xie
- North China University of Science and Technology, Hebei, Tangshan 063210, P.R. China
| | - Yue-Sheng Xie
- North China University of Science and Technology, Hebei, Tangshan 063210, P.R. China
| | - Yue Sun
- North China University of Science and Technology, Hebei, Tangshan 063210, P.R. China
| | - Ting Yang
- North China University of Science and Technology, Hebei, Tangshan 063210, P.R. China
| | - Wen-Wu Xu
- North China University of Science and Technology, Hebei, Tangshan 063210, P.R. China
| | - Hou-Ru Liu
- North China University of Science and Technology, Hebei, Tangshan 063210, P.R. China
| | - Wei Li
- North China University of Science and Technology, Hebei, Tangshan 063210, P.R. China
| | - De-Hong Yu
- North China University of Science and Technology, Hebei, Tangshan 063210, P.R. China
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11
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Zhang Y, Song JH, Xu WW. [Attention should be paid to the detection and surveillance of human respiratory syncytial virus]. Zhonghua Yi Xue Za Zhi 2021; 101:2835-2838. [PMID: 34587725 DOI: 10.3760/cma.j.cn112137-20210621-01400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Human respiratory syncytial virus (HRSV) is the main pathogen of severe lower respiratory tract infection in infants and young children. It seriously endangers children's health. In recent years, great breakthroughs have been made in the research and development of HRSV vaccines and antibody-based biological products. The research and development and use strategies are inseparable from the monitoring of HRSV prevalence and virus variation characteristics. The World Health Organization (WHO) pays great attentions to the surveillance of HRSV epidemiology and virus variation characteristics, but China lacks national level and multi-center HRSV surveillance data, the surveillance case definitions used by various laboratories are inconsistent, and the detection and surveillance methods of HRSV are not unified. Results from different laboratories are difficult to be compared and analyzed. Therefore, it is urgent to establish a nation-wide HRSV surveillance network in China, and to persistently monitor the epidemic characteristics and virus variation characteristics of HRSV by using standardized HRSV detection methods and surveillance guideline, so as to provide basic scientific data for the research and development, use and evaluation of monoclonal antibodies and vaccines.
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Affiliation(s)
- Y Zhang
- National Institute for Viral Diseases Control and Prevention, China CDC, NHC Key Laboratory of Medical Virology and Viral Diseases, WHO WPRO Regional Reference Measles/Rubella Laboratory, Beijing 102206, China
| | - J H Song
- National Institute for Viral Diseases Control and Prevention, China CDC, NHC Key Laboratory of Medical Virology and Viral Diseases, WHO WPRO Regional Reference Measles/Rubella Laboratory, Beijing 102206, China
| | - W W Xu
- National Institute for Viral Diseases Control and Prevention, China CDC, NHC Key Laboratory of Medical Virology and Viral Diseases, WHO WPRO Regional Reference Measles/Rubella Laboratory, Beijing 102206, China
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12
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Wang DY, Song Y, Han ZZ, Xiao JB, Lu HH, Yan DM, Ji TJ, Yang Q, Zhu SL, Xu WW, Zhang Y. [Genetic characterization analysis of the whole genome sequence of Coxsackievirus A8 associated with hand, foot and mouth disease in China]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:1487-1492. [PMID: 34814572 DOI: 10.3760/cma.j.cn112338-20201023-01266] [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: 06/13/2023]
Abstract
Objective: To study the genomic sequence of Coxsackievirus A8 (CV-A8) associated with hand, foot and mouth disease (HFMD) from 2013 to 2018 in China and to analyze the genetic evolution of each coding region of the full-length genome. Methods: The genome sequences of 11 CV-A8 strains isolated from patients with HFMD in different regions of China from 2013 to 2018 were determined. Sequence alignment and genetic evolution analysis were performed by Sequencher 5.0 and MEGA 7.0 software, etc. Results: Sequence alignment showed that the genome length of 11 CV-A8 strains ranged from 7 393 bp to 7 400 bp. There was no base insertion or deletion in the coding region compared with the prototype strain, but there were individual base insertion or deletion in the non-coding region. The nucleotide and amino acid similarities in the VP1 region of 11 CV-A8 strains were 78.3%-98.6% and 92.6%-99.7%, respectively, and the nucleotide and amino acid sequences identities with the CV-A8 prototype strain were 78.3%-98.2% and 92.6%-99.7%, respectively. Based on the phylogenetic analysis of VP1 region sequences, the CV-A8 can be divided into five genotypes: A, B, C, D and E. The 11 CV-A8 strains in this study belonged to genotypes C (1 strain), D (2 strains) and E (8 strains). The nucleotide and amino acid similarities of 11 CV-A8 full-length genomes were 81.3%-98.8% and 95.9%-99.5%, respectively. The phylogenetic tree of the P2 region showed that the eight E genotypes CV-A8 had the closest evolutionary distance with CV-A4, CV-A14, and CV-A16. The phylogenetic tree of the P3 region showed that the eight E genotypes CV-A8 had a close evolutionary distance with CV-A5, CV-A16, CV-A14 and CV-A4. Conclusions: The 11 CV-A8 stains in this study showed significant intra-genotype diversity in capsid region and recombinant diversity in non-capsid region which indicated that CV-A8 quasispecies were still undergoing dynamics variation. CV-A8 may become an important pathogen of HFMD and the monitoring of CV-A8 needs to be further strengthened.
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Affiliation(s)
- D Y Wang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention/National Laboratory of Poliomyelitis/WHO West Pacific Regional Polio Reference Laboratory/Key Laboratory of Biosafety and Key Laboratory of Medical Viruses and Viral Diseases, National Health Commission, Beijing 102206, China
| | - Y Song
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention/National Laboratory of Poliomyelitis/WHO West Pacific Regional Polio Reference Laboratory/Key Laboratory of Biosafety and Key Laboratory of Medical Viruses and Viral Diseases, National Health Commission, Beijing 102206, China
| | - Z Z Han
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention/National Laboratory of Poliomyelitis/WHO West Pacific Regional Polio Reference Laboratory/Key Laboratory of Biosafety and Key Laboratory of Medical Viruses and Viral Diseases, National Health Commission, Beijing 102206, China
| | - J B Xiao
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention/National Laboratory of Poliomyelitis/WHO West Pacific Regional Polio Reference Laboratory/Key Laboratory of Biosafety and Key Laboratory of Medical Viruses and Viral Diseases, National Health Commission, Beijing 102206, China
| | - H H Lu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention/National Laboratory of Poliomyelitis/WHO West Pacific Regional Polio Reference Laboratory/Key Laboratory of Biosafety and Key Laboratory of Medical Viruses and Viral Diseases, National Health Commission, Beijing 102206, China
| | - D M Yan
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention/National Laboratory of Poliomyelitis/WHO West Pacific Regional Polio Reference Laboratory/Key Laboratory of Biosafety and Key Laboratory of Medical Viruses and Viral Diseases, National Health Commission, Beijing 102206, China
| | - T J Ji
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention/National Laboratory of Poliomyelitis/WHO West Pacific Regional Polio Reference Laboratory/Key Laboratory of Biosafety and Key Laboratory of Medical Viruses and Viral Diseases, National Health Commission, Beijing 102206, China
| | - Q Yang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention/National Laboratory of Poliomyelitis/WHO West Pacific Regional Polio Reference Laboratory/Key Laboratory of Biosafety and Key Laboratory of Medical Viruses and Viral Diseases, National Health Commission, Beijing 102206, China
| | - S L Zhu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention/National Laboratory of Poliomyelitis/WHO West Pacific Regional Polio Reference Laboratory/Key Laboratory of Biosafety and Key Laboratory of Medical Viruses and Viral Diseases, National Health Commission, Beijing 102206, China
| | - W W Xu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention/National Laboratory of Poliomyelitis/WHO West Pacific Regional Polio Reference Laboratory/Key Laboratory of Biosafety and Key Laboratory of Medical Viruses and Viral Diseases, National Health Commission, Beijing 102206, China
| | - Y Zhang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention/National Laboratory of Poliomyelitis/WHO West Pacific Regional Polio Reference Laboratory/Key Laboratory of Biosafety and Key Laboratory of Medical Viruses and Viral Diseases, National Health Commission, Beijing 102206, China
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13
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Zhang H, Wang L, Ge CS, Xue GW, Bu XC, Zhang W, Duan CL, Liu ZT, Wang MY, Cai YD, Xu WW, Gao Y. [Efficacy and safety of giant emphysematous bulla volume reduction via medical thoracoscope]. Zhonghua Yi Xue Za Zhi 2021; 101:2370-2374. [PMID: 34404129 DOI: 10.3760/cma.j.cn112137-20201116-03107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the efficacy and safety of giant emphysematous bulla (GEB) volume reduction via medical thoracoscope. Methods: This was a prospective, single-arm study conducted between July 2018 and September 2020 in Ri Zhao Hospital of Traditional Chinese Medicine. Patients who met the inclusion criteria were treated with GEB volume reduction via medical thoracoscope and were followed up to evaluate the efficacy and safety of the technique. According to comparison of preoperative and postoperative chest CT results, the self-designed evaluation criteria of imaging efficacy were as follows: complete or nearly complete disappearance of GEB (GEB volume reduction ≥90%), significant reduction of GEB (75%≤GEB volume reduction<90%), reduction of GEB (50%≤GEB volume reduction<75%) and no change (GEB volume reduction<50%). Results: A total of 47 patients were included, among whom 43 were males, with an age M (Q1, Q3) of 63.0 (55.0, 67.0). The CT results showed complete or nearly complete disappearance of GEB in 43 patients, significant reduction of GEB in 3 patients and reduction of GEB in 1 patient before discharge. The degree of dyspnea improved significantly (P<0.05). Arterial partial pressure of carbon dioxide (PaCO2) decreased from (48.2±8.4)mmHg (1 mmHg=0.133 kPa) to (45.4±7.3)mmHg (P<0.05). The 6-minute walk test (6MWT) increased from (245.6±162.4)m to (283.5±152.2)m (P<0.05). Six-month postoperative follow-up was completed in 24 patients, and CT results showed that the efficacy of volume reduction was continuous compared with that before discharge. GEB was further reduced or even disappeared in 3 of the cases. Besides, the degree of dyspnea, 6MWT (384.4±148.2)m and PaCO2 (42.7±6.6)mmHg were improved significantly (P<0.05). The oxygenation index (356.86±61.21)mmHg was significantly higher than that before surgery (295.20±67.16)mmHg and before discharge (294.50±76.69)mmHg (P<0.05). No perioperative deaths occurred. Conclusions: GEB volume can be completely eliminated or significantly reduced by this innovative technique, while PaCO2, the degree of dyspnea and exercise endurance can be significantly improved after operation. The 6-month follow-up after surgery showed that the above benefits continued, and that the oxygenation index improved significantly.
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Affiliation(s)
- H Zhang
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - L Wang
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C S Ge
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - G W Xue
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - X C Bu
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - W Zhang
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - C L Duan
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Z T Liu
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - M Y Wang
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Y D Cai
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - W W Xu
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
| | - Y Gao
- Department of Respiratory and Critical Care Medicine, Ri Zhao Hospital of Traditional Chinese Medicine, Rizhao 276800, China
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14
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Xu J, Xie ZB, Guo JY, Song JH, He P, Min XY, Zhou SS, Zhang Q, Sun KX, Hu ML, Xia BC, Liu Y, Jiang J, Zhu Z, Mao NY, Zhang Y, Xu WW. [Viral pathogenic spectrum analysis of severe acute respiratory infection cases in Luohe City, Henan province from 2017 to 2019]. Zhonghua Yu Fang Yi Xue Za Zhi 2021; 55:931-937. [PMID: 34445830 DOI: 10.3760/cma.j.cn112150-20210325-00296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: The purpose of this study was to investigate the characteristics of viral pathogen spectrum and the epidemiological characteristics of each viral pathogen in hospitalized cases associated with severe acute respiratory infection (SARI) in Luohe City, Henan Province from 2017 to 2019. Methods: Based the SARI Case Surveillance Platform, SARI cases were collected in Central Hospital of Luohe City, Henan Province from November 2017 to February 2019. In the end, 783 SARI cases were included, whose throat swabs were taken within 24 h of admission, as well as their demographic characteristics, onset time, clinical characteristics and other information recorded. At the same time, viral identification was performed, and the age and time distribution of each virus were analyzed. Results: The age of 783 SARI cases shown as M (P25, P75) was 3 (1, 5) years old, ranging from 1 month to 95 years old. Children under 5 years old were the majority (71.01%). The males (61.81%) were more than females (38.18%). Among the 783 SARI cases, a total of 9 kind of viruses were identified with 64.88% (508/783) of the throat swabs tested positive for at least one virus. The positive rate of influenza virus and human respiratory syncytial virus were both 20.18% (158 cases), which was the highest among all the detected respiratory virus. The co-infection rate was 15.84% (124/783), among which double infection was the most common, accounting for 85.48% (106/124) of the co-infected cases. And human respiratory syncytial virus, human rhinovirus and influenza virus were the most common pathogen in co-infection cases. Moreover, the viral positive rate was 68.71% in children aged 5 years and 63.27% in people aged 60-95 years. Influenza and human respiratory syncytial virus dominated in winter and spring, while human parainfluenza virus was the main infection in summer. Conclusion: Influenza virus and human respiratory syncytial virus were the main viruses in throat swabs of SARI cases from 2017 to 2019 in Luohe City, Henan Province. There were differences in the age and seasonal epidemiological characteristics of each virus.
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Affiliation(s)
- J Xu
- Institute of Expanded Immunization Programme, Henan Provincial Center for Disease Control and Prevention, Zhengzhou 450016, China
| | - Z B Xie
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - J Y Guo
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - J H Song
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - P He
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - X Y Min
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - S S Zhou
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - Q Zhang
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - K X Sun
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - M L Hu
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - B C Xia
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - Y Liu
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - J Jiang
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - Z Zhu
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - N Y Mao
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - Y Zhang
- WHO WPRO Regional Reference Laboratory of Measles and Rubella/NHC Key Laboratory of Medical Virology and Viral Diseases/National Measles Laboratory, National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
| | - W W Xu
- National Institute for Viral Disease Control and Prevention, Chinese Centers for Disease Control and Prevention, Beijing 102206, China
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15
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Zhang H, Zhang W, Wang MY, Ge CS, Wang L, Liu ZT, Duan CL, Gao Y, Cai YD, Xu WW, Du CL, Sun ZM, Liu XL, Chen CD. [Efficacy and safety of position selection combined with intra-pleural thrombin injection in the treatment of postoperative persistent air leakage in bullous pulmonary-pleural diseases]. Zhonghua Jie He He Hu Xi Za Zhi 2021; 44:619-623. [PMID: 34256448 DOI: 10.3760/cma.j.cn112147-20210109-00034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the efficacy and safety of position selection in combination with intra-pleural thrombin injection in the treatment of persistent air leakage (PAL) after medical thoracoscopic treatment of bullous pulmonary-pleural diseases (e.g. spontaneous pneumothorax or giant emphysematous bulla). Methods: This was a prospective study conducted in Rizhao Hospital of Traditional Chinese Medicine from August 2018 to November 2020. Twenty patients(19 males,1 female) with a mean age of (62.3±8.1) years met the diagnostic criteria for PAL which was defined as the air leak persisted more than 3 days despite of the closed thoracic drainage after medical thoracoscopic treatment of bullous pulmonary-pleural diseases.They received the following treatment procedures (referred to as "position plus"):①Pleural cavity injection (50% glucose 20 ml+thrombin 5 000 U).②Changing the patient's position under continuous negative pressure suction to find the position causing the complete stop or significant reduction of air leakage, and keeping in the position for 24-48 hours.③If the PAL wasn't stopped 48 hours later, the procedures above would be repeated.The duration of air leakage after "position plus", times of pleural cavity injection, condition of lung re-expansion, recurrence of air leakage and complications during hospitalization were recorded. Descriptive statistics were used to summarize the results:¯x±s or M(P25, P75) for continuous variables; frequency and percentages for categoric variables. Results: A total of 20 patients were included. The average duration of air leakage after"position plus" was (1.32±0.97) days. The times of pleural cavity injection required were 1.0(1.0, 1.0).All the patients showed good lung re-expansion in review of imaging after PAL was stopped. One patient had recurrent air leakage during hospitalization. No serious complications occurred. Conclusion: The comprehensive "position plus" intervention method is effective, safe and easily operating for the treatment of PAL after medical thoracoscopic treatment of bullous pulmonary-pleural diseases.
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Affiliation(s)
- H Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - W Zhang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - M Y Wang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - C S Ge
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - L Wang
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - Z T Liu
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - C L Duan
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - Y Gao
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - Y D Cai
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - W W Xu
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - C L Du
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - Z M Sun
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - X L Liu
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
| | - C D Chen
- Department of Respiratory and Critical Care Medicine, Rizhao Hospital of Traditional Chinese Medicine, Shandong Province 276800, China
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16
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Song JH, Chen ZX, Guo JY, Xie ZB, Du J, Wang HL, Cui AL, Zhu Z, Mao NY, Xu WW, Zhang Y. [Genotype and genetic characteristics of human respiratory syncytial virus circulating in Quanzhou, 2018-2019]. Zhonghua Yi Xue Za Zhi 2021; 101:1695-1699. [PMID: 34126719 DOI: 10.3760/cma.j.cn112137-20210202-00326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the prevalence and genetic characteristics of human respiratory syncytial virus (HRSV) in Quanzhou city, from 2018 to 2019. Methods: A total of 141 throat swabs were collected from children patients of lower respiratory tract infection in Quanzhou children Hospital, Fujian Province from November 2018 to May 2019. RT-PCR was used to amplify the 3 'end of G gene HRSV. Sequencer 5.0 and MEGA5.05 softwares were used for sequence editing, phylogenetic tree construction and genotyping analysis. Results: Twenty-five samples were positive for HRSV. Seventeen samples succeeded to obtain the target gene, including 13 of HRSVA and 4 of HRSVB. Two genotypes were identified: ON1 genotype (13 samples, HRSVA) and BA9 genotype (4 samples, HRSVB). Five strains of ON1 genotype sequences were clustered with the ON1 sequences prevalent in Beijing, Changchun and Zhejiang from 2012 to 2015 (cluster1); one strain (FJ19-02) was clustered with the sequences of ON1 genotype circulating in many regions of China from 2012 to 2015 (cluster2); Seven strains were clustered independently (cluster FJ). FJ18-02, FJ19-14 and FJ19-15 of HRSVB were clustered with the BA9 genotype sequences prevalent in Changchun, Jilin Province in 2015, while FJ19-13 was closely related to the BA9 genotype sequences prevalent in Guangzhou and Zhejiang Province in 2013. Both the ON1 and BA9 genotypes showed variations of nucleotide and amino acid in 72 and 60 insertion segments. Amino acid mutation (H266L) only occurred among the sequence of cluster-FJ, and the mutations of H261Q and Q265L only appeared in strain FJ19-13. Conclusion: BA9 and ON1 genotypes were prevalent in Quanzhou city, from 2018 to 2019. Cluster-FJ was a newly discovered independent transmission chain, which may continue to circulate in local Quanzhou area.
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Affiliation(s)
- J H Song
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Z X Chen
- Department of Critical Care Medicine, Quanzhou Children's Hospital, Quanzhou 362000, China
| | - J Y Guo
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Z B Xie
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - J Du
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - H L Wang
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - A L Cui
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Z Zhu
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - N Y Mao
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - W W Xu
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
| | - Y Zhang
- WHO WPRO Regional Reference Measles/Rubella Laboratory National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, 102206, China
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17
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Yu X, Su Y, Xu WW, Zhao J. Efficient Photoexcited Charge Separation at the Interface of a Novel 0D/2D Heterojunction: A Time-Dependent Ultrafast Dynamic Study. J Phys Chem Lett 2021; 12:2312-2319. [PMID: 33651620 DOI: 10.1021/acs.jpclett.1c00023] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
To achieve efficient conversion and avoid loss of solar energy, ultrafast charge separation and slow electron-hole recombination are desired. Combining time-dependent density functional theory (TD-DFT) with nonadiabatic molecular dynamics, Au9(PH3)8/MoS2, as a prototype for zero-dimensional/two-dimensional (0D/2D) heterojunction, has been demonstrated to present excellent light absorption capacity and effective charge separation characteristics. In the heterojunction, photoexcitation of the Au9(PH3)8 nanocluster drives an ultrafast electron transfer from Au9(PH3)8 to MoS2 within 20 fs, whereas photoexcitation of the MoS2 nanosheet leads to hole transfer from MoS2 to Au9(PH3)8 within 680 fs. The strong nonadiabatic coupling and prominent density overlap are responsible for the faster electron separation relative to hole separation. In competition with the charge separation, electron-hole recombination requires 205 ns, ensuring an effective carrier separation. Our atomistic TD-DFT simulation provides valuable insights into the photocarrier dynamics at the Au9(PH3)8/MoS2 interface, which would stimulate the exploration of 0D/2D hybrid materials for photovoltaic and optoelectronic devices.
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Affiliation(s)
- Xueke Yu
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China
| | - Yan Su
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China
| | - Wen-Wu Xu
- Department of Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, China
| | - Jijun Zhao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China
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18
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Ding YX, Mao NY, Xu WW, Gao ZG, Zhang Y. [Contribution of measles virus IgG antibody avidity assay to the identification of measles cases]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:544-548. [PMID: 34814427 DOI: 10.3760/cma.j.cn112338-20190527-00373] [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: 06/13/2023]
Abstract
Objective: To evaluate the value of measles IgG antibody avidity assay in identifying the measles cases. Methods: Data from the Measles Surveillance Information System was used to collect laboratory confirmed or discarded cases in 2013-2015, and then tracing back the blood specimens from all measles network laboratories in Tianjin. Measles antibody avidity assay was used to detect and to redefine cases from the discarded ones. Results: A total of 326 measles cases including 267 laboratory-confirmed and 59 discarded cases were enrolled into this study, with 92.33% (301/326) of them aged ≥20 years. Result from the measles IgG antibody avidity assay showed that the ratio of high-avidity was 91.23%(52/57) of the discarded cases, which was significantly higher than 66.95% (158/236) of the laboratory confirmed cases (χ2=13.33, P<0.001). According to the case criterion, 15.25% (9/59) of the discarded cases were redefined as measles cases. Eight out of the nine cases were high-avidity with measles containing vaccine (MCV) vaccination history that named as SVF cases. One in nine cases with low-avidity was with typical clinical symptomatic measles but with no vaccination history of MCV. Conclusion: Measles IgG antibody avidity assay could provide reference serological evidence to reduce the error from those discarded cases caused by false negative results on IgM antibody, when diagnosing the measles cases.
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Affiliation(s)
- Y X Ding
- Expanded Program Immunization Department, Tianjin Center for Diseases Control and Prevention, Tianjin 300011, China
| | - N Y Mao
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - W W Xu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Z G Gao
- Expanded Program Immunization Department, Tianjin Center for Diseases Control and Prevention, Tianjin 300011, China
| | - Y Zhang
- Expanded Program Immunization Department, Tianjin Center for Diseases Control and Prevention, Tianjin 300011, China
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19
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Zhao HT, Peng ZB, Yang XK, Li ZL, Ren MR, Qin Y, Sun XJ, Yu JX, An ZJ, Mao NY, Xu WW, Li ZJ. [Progress in research of specific antibody dynamic characteristics in patients with COVID-19]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:39-43. [PMID: 32932571 DOI: 10.3760/cma.j.cn112338-20200809-01047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
COVID-19 is an emerging infectious disease caused by SARS-CoV-2. After the infection of the virus, the host immune system is stimulated to produce multifarious specific antibodies to decrease or eliminate effects of the pathogen. Study of the specific antibodies dynamic characteristics in patients with COVID-19 is very important for the understanding and diagnosis of the disease, research and development of vaccine, and planning of prevention and control strategy. This paper reviews and summarizes the domestic and oversea research on dynamic characteristics of specific antibodies of COVID-19 patients, including the antibody producing, duration and level, and its possible influencing factors in order to improve the understanding of the immunological characteristics of COVID-19.
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Affiliation(s)
- H T Zhao
- Division of Infectious Disease, Key Laboratory of Infectious Disease Surveillance and Early-warning, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Z B Peng
- Branch of Respiratory Disease, Division of Infectious Disease, Key Laboratory of Infectious Disease Surveillance and Ear-warning, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - X K Yang
- Division of Infectious Disease, Key Laboratory of Infectious Disease Surveillance and Early-warning, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Z L Li
- Division of Infectious Disease, Key Laboratory of Infectious Disease Surveillance and Early-warning, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - M R Ren
- Division of Infectious Disease, Key Laboratory of Infectious Disease Surveillance and Early-warning, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Y Qin
- Branch of Respiratory Disease, Division of Infectious Disease, Key Laboratory of Infectious Disease Surveillance and Ear-warning, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - X J Sun
- National Immunization Programme, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - J X Yu
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Z J An
- National Immunization Programme, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - N Y Mao
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - W W Xu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Z J Li
- Division of Infectious Disease, Key Laboratory of Infectious Disease Surveillance and Early-warning, Chinese Center for Disease Control and Prevention, Beijing 102206, China
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20
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Liao QH, He C, Xu WW, Zhi JF. Role of inflammatory factors in peripheral blood cells of patients with ischemic cerebrovascular disease. J BIOL REG HOMEOS AG 2020; 34:21. [PMID: 32124596 DOI: 10.23812/19-368-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Q H Liao
- Department of Rehabilitation Medicine, First People's Hospital of Jiashan County, Zhejiang Province, Jiashan County, China
| | - C He
- Department of General Practice, First People's Hospital of Jiashan County, Zhejiang Province, Jiashan County, China
| | - W W Xu
- Department of Rehabilitation Medicine, First People's Hospital of Jiashan County, Zhejiang Province, Jiashan County, China
| | - J F Zhi
- Department of Rehabilitation Medicine, First People's Hospital of Jiashan County, Zhejiang Province, Jiashan County, China
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21
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Abstract
Abstract
C19H16N2, orthorhombic, P212121 (no. 19), a = 7.5177(10) Å, b = 12.4761(16) Å, c = 16.118(2) Å, V = 1511.7(3) Å3, Z = 4, R
gt(F) = 0.0424, wR
ref(F
2) = 0.0967, T = 293(2) K.
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Affiliation(s)
- Shi-Jun Chen
- School of Pharmacy , North China University of Science and Technology , 063210 Caofeidian District , Tangshan , P.R. China
| | - Hao Zhu
- School of Public Health , North China University of Science and Technology , 063210 Caofeidian District , Tangshan , P.R. China
| | - Meng-Meng Zhang
- School of Pharmacy , North China University of Science and Technology , 063210 Caofeidian District , Tangshan , P.R. China
| | - Wen-Wu Xu
- School of Pharmacy , North China University of Science and Technology , 063210 Caofeidian District , Tangshan , P.R. China
| | - Yu-Cai Wang
- Jia Mu Si University , School of Continuing Education , No.148 Xuefu St, Jiamusi , Heilongjiang , P.R. China
| | - Zhi-Fei Zhang
- School of Pharmacy , North China University of Science and Technology , 063210 Caofeidian District , Tangshan , P.R. China
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22
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Mou JJ, Qi MY, Li CS, Zheng HY, Chen M, Zhou JH, He JL, Xu WW, Xu ST, Xu XG. [Characterization analysis of gM, gL genes of varicella zoster virus in six provinces of China]. Zhonghua Yu Fang Yi Xue Za Zhi 2018; 52:419-423. [PMID: 29614611 DOI: 10.3760/cma.j.issn.0253-9624.2018.04.016] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the genetic characterization of glycoprotein M(gM.),glycoprotein L(gL) of varicella zoster virus. Methods: According to the program of "Ministry of Science and Technology of China" , Based on the 12 suspected VZV patients monitored in Beijing (1 case), Shanghai (5 cases), Jilin (2 cases), Qinghai (1 case), Guangdong (2 case) and Sichuan (case) in 2007-2015. A total of 12 Vesicle fluid and throat swab samples were collected. Positive samples were identified by Agarose gel electrophoresis and two glycoprotein genes were amplified by polymerase chain reaction (PCR). Nucleotide sequences were determined and analyzed by PCR amplification of VZV positive specimens V-OKA-BK of the domestic varicella attenuated live vaccine and the Varilrix-1 of the imported attenuated live vaccine. Nucleotide sequences of VZV positive specimens, vaccine strains (V-OKA-BK, varilrix-1) and GenBank foreign wild strains (41 strains), parent strains (P-oka), vaccine strains (V-oka, Varilrix, Varivax) were compared using BioEdit and MEGA 5.0. Results: 12 specimens were VZV positive. Compared with the vaccine strains and the parent strains, the GM gene of 1 positive specimen had radical mutation at 86686 sites, which resulted in amino acid mutation, 5 positive specimens had base mutation at 87844 sites, and 30 strains of foreign wild strains had the same variation at 87 844 sites. 1 positive specimens of gL gene in 101245 sites had base mutation, and led to amino acid mutation, 6 positive specimens at 101624, 101625, 101626 sites had base of loss and the foreign wild strains in these 3 sites had the same variation. Compared with the vaccine strains, the nucleotide and amino acid homology of gM of 12 VZV positive specimens were 99.2%-100% and 98.2%-100%, respectively, and gL of those were 99.3%-100% and 98.6%-100%, respectively. Compared with 41 strains of foreign wild strains, homology of gM's nucleotides and amino acid were 99.3%-100% and 98.5%-100%, respectively; 99.1%-100% and 98.6%-100% for gL. The results of phylogenetic analysis showed that 7 VZV positive samples were on the same branch with 4 vaccine strains and p-oka strain. Based on gL, 12 VZV positive samples were on the same branch as the vaccine strains and p-oka strain. Conclusion: This study demonstrates that the genes of gM, gL are highly conserved and remain stable immunogen, which may be involved in the attenuation of VZV and need to be further researched.
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Affiliation(s)
- J J Mou
- Institute of Integrative Medicine of Dalian Medical University, Dalian 116044, China
| | - M Y Qi
- Institute of Integrative Medicine of Dalian Medical University, Dalian 116044, China
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23
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Xin WS, Zhang F, Yan GR, Xu WW, Xiao SJ, Zhang ZY, Huang LS. A whole genome sequence association study for puberty in a large Duroc × Erhualian F2 population. Anim Genet 2017; 49:29-35. [PMID: 29194674 DOI: 10.1111/age.12623] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2017] [Indexed: 01/30/2023]
Abstract
A large proportion of gilts and sows are culled from reproduction populations because of anestrus and pubertal reproductive failure. Selecting early onset of puberty gilts has a favorable effect on sows' reproductivity. However, age at puberty is hard to be routinely measured in commercial herds. With molecular genetic predictors, identifying individuals that have a propensity for early onset of puberty can be simplified. We previously performed genome scanning and a genome-wide association study for puberty in an F2 resource population using 183 microsatellites and 62 125 SNPs respectively. The detection power and resolution of identified quantitative trait loci were very low. Herein, we re-sequenced 19 founders of the F2 resource population in high coverage, and whole genome sequences of F2 individuals were imputed to perform an association study for reproductive traits. A total of 2339 SNPs associated with pubertal reproductive failure were identified in the region of 30.94-40.74 Mb on SSC7, with the top one, positioned at 33.36 Mb, explaining 16% of the phenotypic variances. We improved the magnitude of the P-value by 10E+5 to 10E+7 using the whole genome sequence rather than using low/middle density markers as in previous studies, and we narrowed down the QTL confidence interval to 5.25 Mb. Combining the annotation of gene function, RAB23 and BAK1 were perceived as the most compelling candidate genes. The identified loci may be useful in culling sows failing to show estrus by marker-assisted selection to increase reproductive efficiency of swine herds.
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Affiliation(s)
- W S Xin
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang, 330045, China
| | - F Zhang
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang, 330045, China
| | - G R Yan
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang, 330045, China
| | - W W Xu
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang, 330045, China
| | - S J Xiao
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang, 330045, China
| | - Z Y Zhang
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang, 330045, China
| | - L S Huang
- State Key Laboratory for Swine Genetics, Breeding and Production Technology, Jiangxi Agricultural University, Nanchang, 330045, China
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24
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Zhong Y, Yang J, Xu WW, Wang Y, Zheng CC, Li B, He QY. KCTD12 promotes tumorigenesis by facilitating CDC25B/CDK1/Aurora A-dependent G2/M transition. Oncogene 2017; 36:6177-6189. [PMID: 28869606 PMCID: PMC5671937 DOI: 10.1038/onc.2017.287] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Revised: 06/19/2017] [Accepted: 07/14/2017] [Indexed: 02/06/2023]
Abstract
Cell cycle dysregulation leads to uncontrolled cell proliferation and tumorigenesis. Understanding the molecular mechanisms underlying cell cycle progression can provide clues leading to the identification of key proteins involved in cancer development. In this study, we performed proteomics analysis to identify novel regulators of the cell cycle. We found that potassium channel tetramerization domain containing 12 (KCTD12) was significantly upregulated in M phase compared with S phase. We also found that KCTD12 overexpression not only facilitated the G2/M transition and induced cancer cell proliferation, but also promoted the growth of subcutaneous tumors and Ki-67 proliferation index in mice. Regarding the mechanism underlying these phenomena, cyclin-dependent kinase 1 (CDK1) was identified as an interacting partner of KCTD12 by immunoprecipitation and mass spectrometry analysis, which showed that KCTD12 activated CDK1 and Aurora kinase A (Aurora A) and that the effects of KCTD12 on CDK1 phosphorylation and cell proliferation were abrogated by cell division cycle 25B (CDC25B) silencing. In addition, Aurora A phosphorylated KCTD12 at serine 243, thereby initiating a positive feedback loop necessary for KCTD12 to exert its cancer-promoting effects. Furthermore, we analyzed the expression levels of various genes and the correlations between the expression of these genes and survival using tumor tissue microarray and Gene Expression Omnibus (GEO) data sets. The data showed that KCTD12 expression was significantly upregulated in cervical and lung cancers. More importantly, high KCTD12 expression was associated with larger tumor sizes, higher pathological stages and poor patient survival. Collectively, our study demonstrate that KCTD12 binds to CDC25B and activates CDK1 and Aurora A to facilitate the G2/M transition and promote tumorigenesis and that Aurora A phosphorylates KCTD12 at serine 243 to trigger a positive feedback loop, thereby potentiating the effects of KCTD12. Thus, the KCTD12-CDC25B-CDK1-Aurora A axis has important implications for cancer diagnoses and prognoses.
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Affiliation(s)
- Y Zhong
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China.,Department of Pathology, Medical College, Jinan University, Guangzhou, China
| | - J Yang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - W W Xu
- Institute of Biomedicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, National Engineering Research Center of Genetic Medicine, Jinan University, Guangzhou, China
| | - Y Wang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - C-C Zheng
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - B Li
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Q-Y He
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
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25
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Li B, Xu WW, Han L, Chan KT, Tsao SW, Lee NPY, Law S, Xu LY, Li EM, Chan KW, Qin YR, Guan XY, He QY, Cheung ALM. MicroRNA-377 suppresses initiation and progression of esophageal cancer by inhibiting CD133 and VEGF. Oncogene 2017; 36:3986-4000. [PMID: 28288140 PMCID: PMC5511242 DOI: 10.1038/onc.2017.29] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 12/29/2016] [Accepted: 01/11/2017] [Indexed: 02/05/2023]
Abstract
Esophageal cancer is one of the most lethal cancers worldwide with poor survival and limited therapeutic options. The discovery of microRNAs created a new milestone in cancer research. miR-377 is located in chromosome region 14q32, which is frequently deleted in esophageal squamous cell carcinoma (ESCC), but the biological functions, clinical significance and therapeutic implication of miR-377 in ESCC are largely unknown. In this study, we found that miR-377 expression was significantly downregulated in tumor tissue and serum of patients with ESCC. Both tumor tissue and serum miR-377 expression levels were positively correlated with patient survival. Higher serum miR-377 expression was inversely associated with pathologic tumor stage, distant metastasis, residual tumor status and chemoradiotherapy resistance. The roles of miR-377 in suppressing tumor initiation and progression, and the underlying molecular mechanisms were investigated. Results of in vitro and in vivo experiments showed that miR-377 overexpression inhibited the initiation, growth and angiogenesis of ESCC tumors as well as metastatic colonization of ESCC cells, whereas silencing of miR-377 had opposite effects. Mechanistically, miR-377 regulated CD133 and VEGF by directly binding to their 3' untranslated region. Moreover, systemic delivery of formulated miR-377 mimic not only suppressed tumor growth in nude mice but also blocked tumor angiogenesis and metastasis of ESCC cells to the lungs without overt toxicity to mice. Collectively, our study established that miR-377 plays a functional and significant role in suppressing tumor initiation and progression, and may represent a promising non-invasive diagnostic and prognostic biomarker and therapeutic strategy for patients with ESCC.
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MESH Headings
- AC133 Antigen/genetics
- Adult
- Aged
- Aged, 80 and over
- Animals
- Carcinoma, Squamous Cell/diagnosis
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/mortality
- Carcinoma, Squamous Cell/pathology
- Case-Control Studies
- Cell Line, Tumor
- Cell Transformation, Neoplastic/genetics
- Disease Progression
- Down-Regulation/genetics
- Esophageal Neoplasms/diagnosis
- Esophageal Neoplasms/genetics
- Esophageal Neoplasms/mortality
- Esophageal Neoplasms/pathology
- Esophageal Squamous Cell Carcinoma
- Female
- Gene Expression Regulation, Neoplastic
- HEK293 Cells
- Humans
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Inbred NOD
- Mice, Nude
- Mice, SCID
- MicroRNAs/physiology
- Middle Aged
- Vascular Endothelial Growth Factor A/genetics
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Affiliation(s)
- B Li
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
| | - W W Xu
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
| | - L Han
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
| | - K T Chan
- Department of Surgery, The University of Hong Kong, Pokfulam, China
| | - S W Tsao
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
| | - N P Y Lee
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Surgery, The University of Hong Kong, Pokfulam, China
| | - S Law
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Surgery, The University of Hong Kong, Pokfulam, China
| | - L Y Xu
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College, Shantou, China
| | - E M Li
- The Key Laboratory of Molecular Biology for High Cancer Incidence Coastal Chaoshan Area, Shantou University Medical College, Shantou, China
| | - K W Chan
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Pathology, The University of Hong Kong, Pokfulam, China
| | - Y R Qin
- Department of Clinical Oncology, First Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - X Y Guan
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- Department of Clinical oncology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
| | - Q Y He
- College of Life Science and Technology, Jinan University, 601 West Huangpu Blvd., Guangzhou, China
| | - A L M Cheung
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, China
- The University of Hong Kong-Shenzhen Institute of Research and Innovation (HKU-SIRI), Shenzhen, China
- Centre for Cancer Research, The University of Hong Kong, Pokfulam, China
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, China. E-mail:
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Li XY, Li XY, Kong M, Xu WW, Guo LR, Zou M, Su X, Dong XC, Zhou PH. [Etiology characteristics analysis of the first input human infection of avian influenza H7N9 in Tianjin]. Zhonghua Yu Fang Yi Xue Za Zhi 2017; 51:647-649. [PMID: 28693091 DOI: 10.3760/cma.j.issn.0253-9624.2017.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- X Y Li
- Pathogenic Microbiology Institute, Tianjin Centers for Disease Control and Prevention, Tianjin 300011, China
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Wu QH, Wang S, Cong XL, Zhou JH, Cui AL, Xu WW, Xu ST. [Genetic characterization of varicella zoster virus in Jilin province in 2014, China]. Zhonghua Yu Fang Yi Xue Za Zhi 2016; 50:738-742. [PMID: 27539529 DOI: 10.3760/cma.j.issn.0253-9624.2016.08.013] [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: 06/06/2023]
Abstract
OBJECTIVE To clarify the genotype of wild-type strains of varicella zoster virus (VZV) in Jilin province in 2014, and to discriminate between v-Oka vaccine strains and wild-type strains. METHODS Vesicle fluid and throat swab samples were collected from 13 individuals with suspected VZV in Jilin province from January to December 2014. Viral DNA was extracted, the fragments of 15 open reading fragments (ORFs) were amplified by polymerase chain reaction (PCR), and viral genotypes were determined by single nucleotide polymorphisms (SNP). PCR restriction fragment length polymorphism (RFLP) was used to distinguish between wild-type strains and v-Oka vaccine strains. The results were analyzed with MEGA5 software, using the VZV reference strain sequences from GenBank. RESULTS The 13 suspected samples included 5 males and 8 females, aged 11-27 years (mean: (16.69±5.48) years). Sampling was performed on days 0 to 3 of suspected infection. VZV strains were detected in 8 samples, all belonging to Clade 2. There was a synonymous mutation (T>C) in SNP18082 compared with the v-Oka vaccine strain. Analysis of PCR-RFLPs showed that all 8 positive samples were wild-type strains (PstⅠ(+)BglⅠ(+)SmaⅠ(-)). CONCLUSIONS The study revealed that the VZV strains circulating in Jilin province in 2014 were wild-type strains belonging to Clade 2.
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Affiliation(s)
- Q H Wu
- National Institute for Viral Disease Control and Prevention, China Center for Disease Control and Prevention, Beijing 102206, China
| | - S Wang
- Department of measles, Jilin Center for Disease Control and Prevention, Changchun 130062, China
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Xu WW, Tzanakis I, Srirangam P, Mirihanage WU, Eskin DG, Bodey AJ, Lee PD. Synchrotron quantification of ultrasound cavitation and bubble dynamics in Al-10Cu melts. Ultrason Sonochem 2016; 31:355-61. [PMID: 26964960 DOI: 10.1016/j.ultsonch.2016.01.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/18/2015] [Accepted: 01/15/2016] [Indexed: 05/12/2023]
Abstract
Knowledge of the kinetics of gas bubble formation and evolution under cavitation conditions in molten alloys is important for the control casting defects such as porosity and dissolved hydrogen. Using in situ synchrotron X-ray radiography, we studied the dynamic behaviour of ultrasonic cavitation gas bubbles in a molten Al-10 wt%Cu alloy. The size distribution, average radius and growth rate of cavitation gas bubbles were quantified under an acoustic intensity of 800 W/cm(2) and a maximum acoustic pressure of 4.5 MPa (45 atm). Bubbles exhibited a log-normal size distribution with an average radius of 15.3 ± 0.5 μm. Under applied sonication conditions the growth rate of bubble radius, R(t), followed a power law with a form of R(t)=αt(β), and α=0.0021 &β=0.89. The observed tendencies were discussed in relation to bubble growth mechanisms of Al alloy melts.
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Affiliation(s)
- W W Xu
- Manchester X-ray Imaging Facility, University of Manchester, Manchester M13 9PL, UK; Research Complex at Harwell, Didcot OX11 0FA, UK
| | - I Tzanakis
- Brunel Centre for Advanced Solidification Technology, Brunel University London, Uxbridge UB8 3PH, UK
| | - P Srirangam
- WMG, University of Warwick, Coventry CV4 7AL, UK
| | - W U Mirihanage
- Manchester X-ray Imaging Facility, University of Manchester, Manchester M13 9PL, UK; Research Complex at Harwell, Didcot OX11 0FA, UK
| | - D G Eskin
- Brunel Centre for Advanced Solidification Technology, Brunel University London, Uxbridge UB8 3PH, UK
| | - A J Bodey
- Diamond Light Source Ltd, Didcot OX11 0DE, UK
| | - P D Lee
- Manchester X-ray Imaging Facility, University of Manchester, Manchester M13 9PL, UK; Research Complex at Harwell, Didcot OX11 0FA, UK
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Tzanakis I, Xu WW, Eskin DG, Lee PD, Kotsovinos N. In situ observation and analysis of ultrasonic capillary effect in molten aluminium. Ultrason Sonochem 2015; 27:72-80. [PMID: 26186822 DOI: 10.1016/j.ultsonch.2015.04.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Revised: 04/09/2015] [Accepted: 04/20/2015] [Indexed: 05/15/2023]
Abstract
An in situ synchrotron radiographic study of a molten Al-10 wt% Cu alloy under the influence of an external ultrasonic field was carried out using the Diamond-Manchester Branchline pink X-ray imaging at the Diamond Light Source in UK. A bespoke test rig was used, consisting of an acoustic transducer with a titanium sonotrode coupled with a PID-controlled resistance furnace. An ultrasonic frequency of 30 kHz, with a peak to peak amplitude at 140 microns, was used, producing a pressure output of 16.9 MPa at the radiation surface of the 1-mm diameter sonotrode. This allowed quantification of not only the cavitation bubble formation and collapse, but there was also evidence of the previously hypothesised ultrasonic capillary effect (UCE), providing the first direct observations of this phenomenon in a molten metallic alloy. This was achieved by quantifying the re-filling of a pre-existing groove in the shape of a tube (which acted as a micro-capillary channel) formed by the oxide envelope of the liquid sample. Analytical solutions of the flow suggest that the filling process, which took place in very small timescales, was related to micro-jetting from the collapsing cavitation bubbles. In addition, a secondary mechanism of liquid penetration through the groove, which is related with the density distribution of the oxides inside the groove, and practically to the filtration of aluminium melt from oxides, was revealed. The observation of the almost instantaneous re-filling of a micro-capillary channel with the metallic melt supports the hypothesised sono-capillary effect in technologically important liquids other than water, like metallic alloys with substantially higher surface tension and density.
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Affiliation(s)
- I Tzanakis
- Brunel Centre for Advanced Solidification Technology, Brunel University, Uxbridge, London UB8 3PH, UK
| | - W W Xu
- Manchester X-ray Imaging Facility, University of Manchester, Manchester M13 9PL, UK; Research Complex at Harwell, Didcot OX11 0FA, UK
| | - D G Eskin
- Brunel Centre for Advanced Solidification Technology, Brunel University, Uxbridge, London UB8 3PH, UK
| | - P D Lee
- Manchester X-ray Imaging Facility, University of Manchester, Manchester M13 9PL, UK; Research Complex at Harwell, Didcot OX11 0FA, UK
| | - N Kotsovinos
- Laboratory of Hydraulics and Hydraulic Structures, Fluid Mechanics Division, Department of Civil Engineering, Democritus University of Thrace, Greece
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Wong AL, Soo RA, Tan DS, Lee SC, Lim JS, Marban PC, Kong LR, Lee YJ, Wang LZ, Thuya WL, Soong R, Yee MQ, Chin TM, Cordero MT, Asuncion BR, Pang B, Pervaiz S, Hirpara JL, Sinha A, Xu WW, Yuasa M, Tsunoda T, Motoyama M, Yamauchi T, Goh BC. Phase I and biomarker study of OPB-51602, a novel signal transducer and activator of transcription (STAT) 3 inhibitor, in patients with refractory solid malignancies. Ann Oncol 2015; 26:998-1005. [PMID: 25609248 DOI: 10.1093/annonc/mdv026] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 01/05/2015] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The aim of this study was to determine the maximum-tolerated dose (MTD), safety, pharmacokinetics, and pharmacodynamics of OPB-51602, an oral, direct signal transduction activator of transcription 3 (STAT3) inhibitor, in patients with refractory solid tumors. PATIENTS AND METHODS Three cohorts were studied: cohort A, a sequential dose escalation of OPB-51602 administered intermittently (days 1-14 every 21 days); cohort B, an expansion cohort evaluating the dose lower than the MTD; cohort C, evaluating continuous daily dosing. RESULTS Fifty-one patients were studied at 2, 4, and 5 mg per day dosing. The MTD was 5 mg; first-cycle dose-limiting toxicities (DLTs) were grade 3 hyponatremia in one patient, and grade 3 dehydration in another. Intermittent dosing of both 2 and 4 mg doses were tolerable, and the recommended phase II dose was 4 mg. Cohort B investigated 4 mg intermittently, whereas cohort C investigated 4 mg continuously. Common toxicities included fatigue, nausea/vomiting, diarrhea, anorexia, and early-onset peripheral neuropathy. Drug-induced pneumonitis occurred in two patients in cohort C. Continuous dosing was associated with a higher incidence of peripheral neuropathy and a lower mean relative dose intensity, compared with intermittent dosing. Steady-state pharmacokinetics was characterized by high oral clearance, mean elimination half-life ranging from 44 to 61 h, and a large terminal-phase volume of distribution. An active metabolite, OPB-51822, accumulated to a greater extent than OPB-51602. Flow cytometry of peripheral blood mononuclear cells demonstrated pSTAT3 (Tyr(705)) inhibition following exposure. Two patients achieved partial responses at 5 mg intermittently and 4 mg continuously; both had epidermal growth factor receptor (EGFR) mutation-positive non-small-cell lung cancer (NSCLC) with prior EGFR tyrosine kinase inhibitor exposure. CONCLUSION OPB-51602 demonstrates promising antitumor activity, particularly in NSCLC. Its long half-life and poorer tolerability of continuous dosing, compared with intermittent dosing, suggest that less frequent dosing should be explored. CLINICALTRIALSGOV IDENTIFIER NCT01184807.
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Affiliation(s)
- A L Wong
- Department of Haematology-Oncology, National University Health System; Haematology Oncology Research Group, National University Cancer Institute of Singapore, National University Health System; Cancer Science Institute
| | - R A Soo
- Department of Haematology-Oncology, National University Health System; Haematology Oncology Research Group, National University Cancer Institute of Singapore, National University Health System; Cancer Science Institute
| | - D S Tan
- Department of Medical Oncology, National Cancer Centre
| | - S C Lee
- Department of Haematology-Oncology, National University Health System; Haematology Oncology Research Group, National University Cancer Institute of Singapore, National University Health System; Cancer Science Institute
| | - J S Lim
- Department of Haematology-Oncology, National University Health System; Haematology Oncology Research Group, National University Cancer Institute of Singapore, National University Health System
| | - P C Marban
- Haematology Oncology Research Group, National University Cancer Institute of Singapore, National University Health System
| | | | | | - L Z Wang
- Cancer Science Institute; Departments of Pharmacology
| | | | | | | | - T M Chin
- Department of Haematology-Oncology, National University Health System; Haematology Oncology Research Group, National University Cancer Institute of Singapore, National University Health System; Cancer Science Institute
| | - M T Cordero
- Haematology Oncology Research Group, National University Cancer Institute of Singapore, National University Health System
| | | | | | - S Pervaiz
- Physiology, Yong Loo Lin School of Medicine
| | | | - A Sinha
- Department of Diagnostic Imaging, National University Health System, Singapore
| | - W W Xu
- Otsuka Beijing Research Institute, Beijing, China
| | - M Yuasa
- Otsuka Pharmaceutical Co., Ltd, Chiyoda-ku
| | - T Tsunoda
- Otsuka Pharmaceutical Co., Ltd, Chiyoda-ku
| | - M Motoyama
- Otsuka Pharmaceutical Co., Ltd, Chiyoda-ku
| | - T Yamauchi
- Fuji Memorial Research Institute, Otsuka Pharmaceutical Co. Ltd, Chiyoda-ku, Japan
| | - B C Goh
- Department of Haematology-Oncology, National University Health System; Haematology Oncology Research Group, National University Cancer Institute of Singapore, National University Health System; Cancer Science Institute; Departments of Pharmacology.
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Zhang Y, Chang QC, Zhang Y, Na L, Wang WT, Xu WW, Gao DZ, Liu ZX, Wang CR, Zhu XQ. Prevalence of Clonorchis sinensis infection in freshwater fishes in northeastern China. Vet Parasitol 2014; 204:209-13. [PMID: 24880648 DOI: 10.1016/j.vetpar.2014.05.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 03/16/2014] [Accepted: 05/08/2014] [Indexed: 12/16/2022]
Abstract
The prevalence of Clonorchis sinensis infection in freshwater fishes was surveyed in Heilongjiang Province, northeastern China, between August 2011 and September 2013. Thirteen species of freshwater fish (n=3221) and one species of shrimp (n=93) were collected from Songhua river, Nenjiang river and other lakes or ponds in 37 sites of 15 representative cities in Heilongjiang Province. They were individually examined by digestion technique, and the C. sinensis metacercariae were identified morphologically followed by confirmation using sequences of the second internal transcribed spacer of ribosomal DNA. Ten of the 13 examined species of freshwater fishes were infected with C. sinensis metacercariae, while all shrimps were negative. The overall prevalence of C. sinensis infection in 3221 examined freshwater fishes was 19.96%, with 42.57% (272/639) in Pseudorasbora parva, 22.55% (83/368) in Hemicculter leuciclus, 20.44% (121/592) in Carassius auratus, 17.71% (68/384) in Saurogobio dabryi, 10.85% (23/212) in Rhodeus ocellatus, 10.54% (48/455) in Phoxinus lagowskii, 8.20% (21/256) in Perccottus glehnii, 6.25% (5/80) in Misgurnus anguillicaudatus, 4.55% (1/22) in Xenocypris davidi, and 1.49% (1/67) in Cyprinus carpio. The average infection intensity in P. parva was 103.3 encysted metacercariae per gram of fish meat in Zhaoyuan city. The average prevalence of C. sinensis infection in Songhua river, Nenjiang river and lakes or ponds were 31.96% (503/1574), 11.30% (102/903) and 7.93% (59/744), respectively. The prevalence of C. sinensis infection in Zhaoyuan city (43.68%) was the highest among all sampling locations. These results revealed a high-prevalence of C. sinensis infection in freshwater fishes in Heilongjiang Province, northeastern China, posing significant public health concern.
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Affiliation(s)
- Y Zhang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China
| | - Q C Chang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China
| | - Y Zhang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China
| | - L Na
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China
| | - W T Wang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China
| | - W W Xu
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China
| | - D Z Gao
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China
| | - Z X Liu
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China
| | - C R Wang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China.
| | - X Q Zhu
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province 163319, PR China; State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province 730046, PR China.
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Zhang CH, Wu JB, Jin BB, Ji ZM, Kang L, Xu WW, Chen J, Tonouchi M, Wu PH. Low-loss terahertz metamaterial from superconducting niobium nitride films. Opt Express 2012; 20:42-47. [PMID: 22274327 DOI: 10.1364/oe.20.000042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper reports a type of low Ohmic loss terahertz (THz) metamaterials made from low-temperature superconducting niobium nitride (NbN) films. Its resonance properties are studied by THz time domain spectroscopy. Our experiments show that its unloaded quality factor reaches as high as 178 at 8 K with the resonance frequency at around 0.58 THz, which is about 24 times that of gold metamaterial at the same temperature. The unloaded quality factor keeps at a high level, above 90, even when the resonance frequency increases to 1.02 THz, which is close to the gap frequency of NbN film. All these experimental observations fit well into the framework of Bardeen-Copper-Schrieffer theory and equivalent circuit model. These new metamaterials offer an efficient way to the design and implementation of high performance THz electronic devices.
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Affiliation(s)
- C H Zhang
- Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
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Crasta OR, Xu WW, Rosenow DT, Mullet J, Nguyen HT. Mapping of post-flowering drought resistance traits in grain sorghum: association between QTLs influencing premature senescence and maturity. Mol Gen Genet 1999; 262:579-88. [PMID: 10589847 DOI: 10.1007/s004380051120] [Citation(s) in RCA: 153] [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] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The identification of genetic factors underlying the complex responses of plants to drought stress provides a solid basis for improving drought resistance. The staygreen character in sorghum (Sorghum bicolor L. Moench) is a post-flowering drought resistance trait, which makes plants resistant to premature senescence under drought stress during the grainfilling stage. The objective of this study was to identify quantitative trait loci (QTLs) that control premature senescence and maturity traits, and to investigate their association under post-flowering drought stress in grain sorghum. A genetic linkage map was developed using a set of recombinant inbred lines (RILs) obtained from the cross B35 x Tx430, which were scored for 142 restriction fragment length polymorphism (RFLP) markers. The RILs and their parental lines were evaluated for post-flowering drought resistance and maturity in four environments. Simple interval mapping identified seven stay-green QTLs and two maturity QTLs. Three major stay-green QTLs (SGA, SGD and SGG) contributed to 42% of the phenotypic variability (LOD 9.0) and four minor QTLs (SGB, SGI. 1, SGI.2, and SGJ) significantly contributed to an additional 25% of the phenotypic variability in stay-green ratings. One maturity QTL (DFB) alone contributed to 40% of the phenotypic variability (LOD 10.0), while the second QTL (DFG) significantly contributed to an additional 17% of the phenotypic variability (LOD 4.9). Composite interval mapping confirmed the above results with an additional analysis of the QTL x Environment interaction. With heritability estimates of 0.72 for stay-green and 0.90 for maturity, the identified QTLs explained about 90% and 63% of genetic variability for stay-green and maturity traits, respectively. Although stay-green ratings were significantly correlated (r = 0.22, P< or =0.05) with maturity, six of the seven stay-green QTLs were independent of the QTLs influencing maturity. Similarly, one maturity QTL (DFB) was independent of the staygreen QTLs. One stay-green QTL (SGG), however, mapped in the vicinity of a maturity QTL (DFG), and all markers in the vicinity of the independent maturity QTL (DFB) were significantly (P< or =0.1) correlated with stay-green ratings, confounding the phenotyping of stay-green. The molecular genetic analysis of the QTLs influencing stay-green and maturity, together with the association between these two inversely related traits, provides a basis for further study of the underlying physiological mechanisms and demonstrates the possibility of improving drought resistance in plants by pyramiding the favorable QTLs.
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Affiliation(s)
- O R Crasta
- Department of Plant and Soil Sciences, Texas Tech University, Lubbock 79409, USA
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Yuan JM, Yu MC, Xu WW, Cockburn M, Gao YT, Ross RK. Helicobacter pylori infection and risk of gastric cancer in Shanghai, China: updated results based upon a locally developed and validated assay and further follow-up of the cohort. Cancer Epidemiol Biomarkers Prev 1999; 8:621-4. [PMID: 10428200] [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: 02/13/2023] Open
Abstract
Infection with Helicobacter pylori has been associated with an increased risk of gastric cancer in low-risk populations. However, our previous results (P. M. Webb et al., Int. J. Cancer, 67: 603-607, 1996) from an ongoing prospective study in Shanghai, China, a relatively high-risk population, failed to show an association between H. pylori infection and the subsequent risk of gastric cancer. That previous study had a relatively short time period of follow-up and the enzyme-linked immunosorbent assay (ELISA) used was based on strains found in Southern England and without validation among the Chinese. Either one of these two factors could have had an impact on the validity of those earlier observations. An ELISA developed and validated among Shanghai residents was used in the present study to reexamine specific antibodies to H. pylori in 188 gastric cancer patients and 548 control subjects. All of the cases of gastric cancer were identified during the first 12 years of follow-up of a cohort of 18,244 men, ages 45-64 years in Shanghai, from whom blood samples were collected at enrollment during 1986-1989. For each cancer case, three cancer-free control subjects were randomly selected from the cohort and matched to the index cases by age (within 2 years), month and year of sample collection, and neighborhood of residence. The Shanghai-based ELISA detected a higher prevalence of serum antibodies to H. pylori than the English-based assay in both gastric cancer cases (86 versus 53%) and control subjects (85 versus 56%). Virtually all of the subjects (98%) who were H. pylori-seropositive by the English-based assay tested positive by the Shanghai-based assay. On the other hand, 73% of gastric cancer cases and 68% of control subjects who were seronegative according to the English-based assay tested positive by the Shanghai-based assay. Using this alternative assay, combined with increased follow-up, our latest data contradict our earlier findings and show a statistically significant association between H. pylori seropositivity and gastric cancer risk (odds ratio, 1.84; 95% confidence interval, 1.08-3.11). We noted an increasing rate of seropositivity among cases as the time interval between cohort enrollment and cancer diagnosis increased. Among subjects followed for 5 or more years after enrollment, the odds ratio for gastric cancer related to H. pylori seropositivity was 3.74 (95% confidence interval, 1.51-9.30).
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Affiliation(s)
- J M Yuan
- Department of Preventive Medicine, University of Southern California/Norris Comprehensive Cancer Center, University of Southern California School of Medicine, Los Angeles 90033-0800, USA.
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Liu WZ, Xiao SD, Shi Y, Wu SM, Zhang DZ, Xu WW, Tytgat GN. Furazolidone-containing short-term triple therapies are effective in the treatment of Helicobacter pylori infection. Aliment Pharmacol Ther 1999; 13:317-22. [PMID: 10102964 DOI: 10.1046/j.1365-2036.1999.00492.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND A furazolidone-containing therapeutic regimen for Helicobacter pylori infection has attracted special interest in the face of a rising world-wide metronidazole resistant H. pylori, and the expense of currently used antimicrobial regimens. AIM To evaluate the efficacy of furazolidone-containing regimens in eradicating H. pylori. METHODS One-hundred and forty H. pylori positive patients with endoscopically confirmed duodenal ulcer or functional dyspepsia received one of four different regimens to eradicate H. pylori. In the first trial, the patients were randomly assigned to receive a 1-week course of furazolidone 100 mg b.d. and clarithromycin 250 mg b.d., with either tripotassium dicitrato bismuthate (TDB) 240 mg b.d. (FCB group) or lansoprazole 30 mg daily (FCL group). In the second trial, the patients were randomly assigned to receive a 1-week course of clarithromycin 250 mg b.d. and omeprazole 20 mg daily, with either furazolidone 100 mg b.d. (FCO group) or metronidazole 400 mg b.d. (MCO group). Endoscopy was repeated 4 weeks following completion of therapy with re-assessment of H. pylori status on gastric biopsies by histology and culture. RESULTS Four patients (1 in FCB, 1 in FCO and 2 in MCO groups) dropped out because they refused a follow-up endoscopy. Eradication rates of H. pylori on an intention-to-treat basis in the FCB, FCL, FCO and MCO groups were 91% (32/35, 95% CI: 82-99%), 91% (32/35, CI: 82-99%), 86% (30/35, CI: 74-97%) and 74% (26/35, CI: 60-89%) (all P > 0.05), respectively. Mild side-effects occurred in 15% of the 140 patients. In MCO group, the eradication rate in the patients infected with metronidazole-sensitive isolates of H. pylori was 86%, but dropped to 67% in those with metronidazole-resistance strains (P = 0.198). CONCLUSION One-week regimens containing furazolidone and clarithromycin in combination with TDB or a proton pump inhibitor fulfil the criteria for successful H. pylori therapy.
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Affiliation(s)
- W Z Liu
- Shanghai Institute of Digestive Disease, Shanghai Second Medical University, Shanghai, China
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Zhong N, Wisniewski KE, Kaczmarski AL, Ju W, Xu WM, Xu WW, Mclendon L, Liu B, Kaczmarski W, Sklower Brooks SS, Brown WT. Molecular screening of Batten disease: identification of a missense mutation (E295K) in the CLN3 gene. Hum Genet 1998; 102:57-62. [PMID: 9490299 DOI: 10.1007/s004390050654] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [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: 02/06/2023]
Abstract
Batten disease, the juvenile form of neuronal ceroid lipofuscinosis, is a prevalent neuron degenerative disorder of childhood. A 1.02-kb genomic deletion in the Batten disease gene CLN3 has been determined to be a common mutation. We developed a PCR method to screen for this deletion and tested 43 Batten disease probands. We found 36% (31/86) of Batten disease chromosomes did not carry the 1.02-kb deletion. Of the three heterozygotes for the 1.02-kb deletion, a novel G-to-A missense mutation at nucleotide 1020 of the CLN3 cDNA sequence was found on two of the non-1.02-kb deletion chromosomes. The missense mutation resulted in a substitution of glutamic acid (E) by lysine (K) at position 295 (E295 K). The E295 K mutation causes a change in predicted local protein conformation. This glutamic acid is a highly conserved acidic amino acid, being present in human, mouse, dog and yeast, which suggests it may play an important role in the function of the Batten disease protein.
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Affiliation(s)
- N Zhong
- Department of Human Genetics, New York State Institute for Basic Research, Staten Island 10314, USA.
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Xu WW, Sleper DA, Chao S. Genome mapping of polyploid tall fescue (Festuca arundinacea Schreb.) with RFLP markers. Theor Appl Genet 1995; 91:947-955. [PMID: 24169982 DOI: 10.1007/bf00223905] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/1994] [Accepted: 04/21/1995] [Indexed: 06/02/2023]
Abstract
Genetic mapping using molecular markers such as restriction fragment length polymorphisms (RFLPs) has become a powerful tool for plant geneticists and breeders. Like many economically important polyploid plant species, detailed genetic studies of hexaploid tall fescue (Festuca arundinacea Schreb.) are complicated, and no genetic map has been established. We report here the first tall fescue genetic map. This map was generated from an F2 population of HD28-56 by 'Kentucky-31' and contains 108 RFLP markers. Although the two parental plants were heterozygous, the perennial and tillering growth habit, high degree of RFLP, and disomic inheritance of tall fescue enabled us to identify the segregating homologous alleles. The map covers 1274 cM on 19 linkage groups with an average of 5 loci per linkage group (LG) and 17.9 cM between loci. Mapping the homoeologous loci detected by the same probe allowed us to identify five homoeologous groups within which the gene orders were found to be generally conserved among homoeologous chromosomes. An exception was homoeologous group 5, in which only 2 of the 3 homoeologous chromosomes were identified. Using 12 genome-specific probes, we were able to assign several linkage groups to one of the three genomes (PG1G2) in tall fescue. All the loci detected by the 11 probes specific to the G1 and/or G2 genomes, with one exception, identified loci located on 4 chromosomes of two homoeologous groups (LG2a, LG2c, LG3a, and LG3c). A P-genome-specific probe was used to map a locus on LG5c. Comparative genome mapping with maize probes indicated that homoeologous group 3 and 2 chromosomes in tall fescue corresponded to maize chromosome 1. Difficulties and advantages of applying RFLP technology in polyploids with high levels of heterozygosity are discussed.
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Affiliation(s)
- W W Xu
- Department of Agronomy, University of Missouri-Columbia, 65211, Columbia, MO, USA
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Wang B, Xu WW, Wang JZ, Wu W, Zheng HG, Yang ZY, Ray JD, Nguyen HT. Tagging and mapping the thermo-sensitive genic male-sterile gene in rice (Oryza sativa L.) with molecular markers. Theor Appl Genet 1995; 91:1111-1114. [PMID: 24170005 DOI: 10.1007/bf00223928] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/1995] [Accepted: 03/17/1995] [Indexed: 06/02/2023]
Abstract
The thermo-sensititve genic male-sterile (TGMS) gene in rice can alter fertility in response to temperature and is useful in the two-line system of hybrid rice production. However, little is known about the TGMS gene at the molecular level. The objective of this study was to identify molecular markers tightly linked with the TGMS gene and to map the gene onto a specific rice chromosome. Bulked segregant analysis of an F2 population from 5460s (a TGMS mutant line) x 'Hong Wan 52' was used to identify RAPD markers linked to the rice TGMS gene. Four hundred RAPD primers were screened for polymorphisms between the parents and between two bulks representing fertile and sterile plants; of these, 4 primers produced polymorphic products. Most of the polymorphic fragments contained repetitive sequences. Only one singlecopy sequence fragment was found, a 1.2-kb fragment amplified by primer OPB-19 and subsequently named TGMS1.2. TGMS1.2 was mapped on chromosome 8 with a RIL population and confirmed by remapping with a DHL population. Segregation analysis using TGMS1.2 as a probe indicated that TGMS1.2 both consegregated and was lined with the TGMS gene in this population. It is located about 6.7 cM from the TGMS gene. As TGMS1.2 is linked to the TGMS gene, the TGMS gene must be located on chromosome 8.
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Affiliation(s)
- B Wang
- Institute of Genetics, Chinese Academy of Sciences, 100101, Beijing, China
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Xu WW, Sleper DA. Phylogeny of tall fescue and related species using RFLPs. Theor Appl Genet 1994; 88:685-690. [PMID: 24186163 DOI: 10.1007/bf01253971] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/1993] [Accepted: 10/26/1993] [Indexed: 06/02/2023]
Abstract
The wild species of tall fescue (Festuca arundinacea var.genuina Schreb.) represent a wide range of genetic variation and constitute potential germplasm for tall fescue improvement. Our objective was to evaluate genome specificity of the previously-identified DNA probes and to examine the phylogenetic relationship of tall fescue with six related species by using RFLP data. A total of 29 DNA probes from aPstI-genomic library of tall fescue were hybridized toEcoRI-orHindIII-digested DNA of 32 plants from sixFestuca species and fromLolium perenne L. Fifteen probes hybridized to all seven species. The remaining 14 probes showed differential hybridization patterns (i.e., ±), especially at the diploid and tetraploid levels. This hybridization pattern reflected genome divergence in these species. The DNA probes will be useful markers in breeding programs involving interspecific and intergeneric hybridization. Cluster analyses were performed using the average genetic distances calculated with the RFLP data from 53 probe-enzyme combinations. Generally, genotypes from the same species were grouped in the same cluster. These data indicated that tall fescue has a close relationship withF. pratensis Huds. (diploid),F. arundinacea var.glaucescens Boiss. (tetraploid), andL. perenne L. (diploid) and thatFestuca pratensis andL. perenne had the closest degree of relationship.
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Affiliation(s)
- W W Xu
- Department of Agronomy, University of Missouri-Columbia, 65211, Columbia, MO, USA
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Xiao SD, Liu WZ, Xia DH, Jiang SJ, Wang RN, Zhang ZH, Xu WW. The efficacy of furazolidone and metronidazole in the treatment of chronic gastritis associated with Helicobacter (Campylobacter) pylori--a randomized double-blind placebo-controlled clinical trial. Hepatogastroenterology 1990; 37:503-6. [PMID: 2253927] [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: 12/31/2022]
Abstract
Seventy-two patients with Helicobacter pylori-associated chronic gastritis were randomized to a 3-week oral treatment with furazolidone 0.1g t.i.d. or metronidazole 0.2g t.i.d. or placebo. Endoscopy was performed before and after treatment, and biopsy specimens were taken from the antrum of the stomach for histological examination and culture of Helicobacter pylori. Disappearance rates of Helicobacter pylori in furazolidone, metronidazole and the control groups were 74% (20/27) if considering completion of therapy, the 20/25 or 80%, 33.3% (8/24) and 14.3% (3/21) respectively. There was a significant difference in the disappearance rate of Helicobacter pylori between furazolidone and metronidazole, and between furazolidone and the placebo group (p less than 0.01), but there was no such difference between metronidazole and the placebo group (p greater than 0.05). In the patients receiving furazolidone, the eradication of Helicobacter pylori was accompanied by marked improvement in both inflammatory infiltration in the gastric mucosa and symptoms. These results reasonably suggest that Helicobacter pylori may play an etiological role in the pathogenesis of chronic gastritis, and that furazolidone is effective in the treatment of Helicobacter pylori-associated chronic gastritis.
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Affiliation(s)
- S D Xiao
- Shanghai Institute of Digestive Disease, Republic of China
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Xiao SD, Jiang SJ, Hu YB, Shi Y, Xu JP, Xia DH, Yuan JM, Xu WW. Serum vitamin B12 levels and dual isotope test for vitamin B12 malabsorption in atrophic gastritis. Chin Med J (Engl) 1985; 98:349-52. [PMID: 3926408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Wu XN, Wang GL, Huang YZ, Wang YX, Zhou YH, Xiao SD, Zeng MD, Ren WP, Yuan JM, Xu WW. Diagnostic value of fasting and postprandial conjugated serum cholic acid in chronic liver diseases. Chin Med J (Engl) 1985; 98:42-6. [PMID: 3924498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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