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He Q, Zhao H, Teng Z, Guo Y, Ji X, Hu W, Li M. Tuning microscopic structure of La-MOFs via ligand engineering effect towards enhancing phosphate adsorption. J Environ Manage 2024; 353:120149. [PMID: 38278114 DOI: 10.1016/j.jenvman.2024.120149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/18/2023] [Accepted: 01/07/2024] [Indexed: 01/28/2024]
Abstract
The selection of different organic ligands when synthesizing metal organic framework (MOFs) can change their effects on the adsorption performance. Here, four La-MOFs adsorbents (La-SA, La-FA, La-TA and La-OA) with different organic ligands and structures were synthesized by solvothermal method for phosphate adsorption, and the relationship between their adsorption properties and structures was established. Among four La-MOFs, their phosphate adsorption capacities and adsorption rates followed La-SA > La-FA > La-TA > La-OA. The results indicated that average pore diameter played a key role in phosphate adsorption and there was a positive correlation between average pore diameter and adsorption capacity (R2 = 0.86). Coexisting ion experiments showed that phosphate adsorptions on three La-MOFs (La-SA, La-FA and La-TA) were inhibited in the presence of CO32- and HCO3-. The inhibition of CO32- was the most pronounced and the results of redundancy analysis pointed out that it was mainly due to the change of pH value. In contrast, La-OA showed enhanced phosphate adsorption in the presence of CO32- and HCO3-, and the combination of pH experiments showed that phosphate adsorption by La-OA was increased under alkaline conditions. Further combined with FT-IR, XRD, high resolution energy spectra of XPS (La 3d, P 2p and O 1s) and XANES, the adsorption mechanisms were derived electrostatic attraction, chemical precipitation and inner sphere complexation, and the last two were identified as the main mechanisms. Moreover, it can be identified from XPS 2p that the phosphate adsorption on La-FA and La-OA were mainly in the LaPO4 state, while La-SA and La-TA mainly existed in the form of LaPO4·xH2O crystals and inner sphere complexes. From the perspective of material morphology, this work provides a thought for the rational design of MOFs with adjustable properties for phosphate adsorption.
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Affiliation(s)
- Qinqin He
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Hongjun Zhao
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Zedong Teng
- Innovation Academy for Green Manufacture, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yali Guo
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai, 200335, China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai, 200335, China
| | - Xiaonan Ji
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai, 200335, China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai, 200335, China
| | - Wei Hu
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai, 200335, China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai, 200335, China
| | - Min Li
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
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Qiu Q, Wu HY, Shi HL, Pan H, Jiang CY, Teng Z, Liu JJ, Zheng YX, Chen J. [Analysis of parainfluenza virus infection in acute respiratory tract infection adult cases in Shanghai, 2015-2021]. Zhonghua Liu Xing Bing Xue Za Zhi 2023; 44:1628-1633. [PMID: 37875452 DOI: 10.3760/cma.j.cn112338-20230404-00210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Objective: To study the infection status and epidemiological characteristics of parainfluenza virus (PIV) in acute respiratory tract infection adult cases in Shanghai from 2015 to 2021, and to provide a scientific basis for preventing and controlling PIV. Methods: Acute respiratory tract infections were collected from 13 hospitals in Shanghai from 2015 to 2021. Relevant information was registered, and respiratory specimens were sampled to detect respiratory pathogens by multiplex PCR. Results: A total of 5 104 adult acute respiratory tract infection cases were included; the overall positive rate of the respiratory pathogens was 29.37% (1 499/5 104). The positive rate of PIV was 2.61% (133/5 104), compared with 2.32% (55/2 369) and 2.85% (78/2 735) in influenza-like cases (ILI) and severe acute respiratory infection (SARI) cases, respectively. Among them, PIV3 accounted for the highest proportion (62.41%, 83/133), followed by PIV1 (18.80%, 25/133), PIV2 (9.77%, 13/133), and PIV4 (9.02%, 12/133). The incidence of PIV-positive cases was mainly distributed in the first and second quarters, accounting for 62.41% (83/133). The difference in the incidence in each quarter was significant (χ2=24.78, P<0.001). Mixed infection accounted for 18.80% (25/133) of 133 PIV-positive cases, the mixed infection rates of ILI and SARI were 18.18% (10/55) and 19.23% (15/78), respectively, and the main mixed pathogen of PIV was coronavirus 229E. Conclusions: There are a certain proportion of PIV-positive acute respiratory tract infection cases in Shanghai. It is necessary to strengthen the etiological surveillance in acute respiratory tract infection cases, especially the mixed infection of PIV and other pathogens.
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Affiliation(s)
- Q Qiu
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H Y Wu
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H L Shi
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H Pan
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - C Y Jiang
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Z Teng
- Department of Microbiology, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - J J Liu
- Department of Microbiology, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Y X Zheng
- Institute of Infectious Disease Prevention and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - J Chen
- Shanghai Institute of Preventive Medicine, Shanghai 200336, China
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Guo H, Ji M, Du T, Xu W, Liu J, Bai R, Teng Z, Li T. Salt stress altered anaerobic microbial community and carbon metabolism characteristics: The trade-off between methanogenesis and chain elongation. J Environ Manage 2023; 341:118111. [PMID: 37156025 DOI: 10.1016/j.jenvman.2023.118111] [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: 03/17/2023] [Revised: 05/02/2023] [Accepted: 05/04/2023] [Indexed: 05/10/2023]
Abstract
Discharge of saline organic wastewater is increasing worldwide, yet how salt stress disrupts the microbial community's structure and metabolism in bioreactors has not been systematically investigated. The non-adapted anaerobic granular sludge was inoculated into wastewater with varying salt concentration (ranging from 0% to 5%) to examine the effects of salt stress on the structure and function of the anaerobic microbial community. Result indicated that salt stress had a significant impact on the metabolic function and community structure of the anaerobic granular sludge. Specifically, we observed a notable reduction in methane production in response to all salt stress treatments (r = -0.97, p < 0.01), while an unexpected increase in butyrate production (r = 0.91, p < 0.01) under moderate salt stress (1-3%) with ethanol and acetate as carbon sources. In addition, analysis of microbiome structures and networks demonstrated that as the degree of salt stress increased, the networks exhibited lower connectance and increased compartmentalization. The abundance of interaction partners (methanogenic archaea and syntrophic bacteria) decreased under salt stress. In contrast, the abundance of chain elongation bacteria, specifically Clostridium kluyveri, increased under moderate salt stress (1-3%). As a consequence, the microbial carbon metabolism patterns shifted from cooperative mode (methanogenesis) to independent mode (carbon chain elongation) under moderate salt stress. This study provides evidence that salt stress altered the anaerobic microbial community and carbon metabolism characteristics, and suggests potential guidance for steering the microbiota to promote resource conversion in saline organic wastewater treatment.
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Affiliation(s)
- Huiyuan Guo
- CAS Key Laboratory of Green Process and Engineering, Innovation Academy for Green Manufacture, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Meina Ji
- CAS Key Laboratory of Green Process and Engineering, Innovation Academy for Green Manufacture, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; Wuhan Institute of Technology, Wuhan, 430205, China
| | - Tianxiao Du
- CAS Key Laboratory of Green Process and Engineering, Innovation Academy for Green Manufacture, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Weichao Xu
- CAS Key Laboratory of Green Process and Engineering, Innovation Academy for Green Manufacture, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jianwei Liu
- Beijing Research Center of Sustainable Urban Drainage System and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| | - Renbi Bai
- Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, 215009, China
| | - Zedong Teng
- CAS Key Laboratory of Green Process and Engineering, Innovation Academy for Green Manufacture, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Tinggang Li
- CAS Key Laboratory of Green Process and Engineering, Innovation Academy for Green Manufacture, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Ganjiang Innovation Academy, Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths, Chinese Academy of Sciences, Ganzhou, 341000, China.
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Teng Z, Zhao X, Jia B, Ye L, Tian S, Guo H, Guo Y, Ji X, Li T, Li M. Bioremediation system consisted with Leclercia adecarboxylata and nZVI@Carbon/Phosphate for lead immobilization: The passivation mechanisms of chemical reaction and biological metabolism in soil. J Environ Manage 2023; 340:117888. [PMID: 37087891 DOI: 10.1016/j.jenvman.2023.117888] [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: 12/28/2022] [Revised: 03/21/2023] [Accepted: 04/04/2023] [Indexed: 05/03/2023]
Abstract
Bioremediation is one of the most promising strategies for heavy metal immobilization. A new remediation system was demonstrated in this research, which combined phosphate solubilizing bacteria (PSB) with nZVI@Carbon/Phosphate (nZVI@C/P) composite to remediate lead contaminated soil. Experimental results indicated that the new system (nZVI@C/P + PSB) could effectively convert the labile Pb into the stable fraction after 30 days of incubation, which increased the maximum residual fraction percentage of Pb by 70.58%. The characterization results showed that lead may exist in the forms of Pb5(PO4)3Cl, PbSO4 and 3PbCO3·2Pb(OH)2·H2O in the soil treated with nZVI@C/P + PSB. Meanwhile, soil enzyme activities and Leclercia abundance were enhanced in the treated soil compared with CK during the incubation time. In addition, the specialized functions (e.g. ABC transporters, siderophore metabolism, sulfur metabolism and phosphorus metabolism) in PSB and nZVI@C/P + PSB group were also enhanced. These phenomena proved that the key soil metabolic functions may be maintained and enhanced through the synergistic effect of incubated PSB and nZVI@C/P. The study demonstrated that this new bioremediation system provided feasible way to improve the efficacy for lead contaminated soil remediation.
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Affiliation(s)
- Zedong Teng
- Key Laboratory of Green Process and Engineering, Beijing Engineering Research Centre of Process Pollution Control, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, 100190, China; Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
| | - Xin Zhao
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Bojie Jia
- Key Laboratory of Green Process and Engineering, Beijing Engineering Research Centre of Process Pollution Control, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, 100190, China
| | - Liangjun Ye
- Ganjiang Innovation Academy, Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths, Chinese Academy of Sciences, Ganzhou, 341000, China
| | - Shaojing Tian
- Ganjiang Innovation Academy, Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths, Chinese Academy of Sciences, Ganzhou, 341000, China
| | - Huiyuan Guo
- Key Laboratory of Green Process and Engineering, Beijing Engineering Research Centre of Process Pollution Control, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yali Guo
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai, 200335, China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai, 200335, China
| | - Xiaonan Ji
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai, 200335, China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai, 200335, China
| | - Tinggang Li
- Key Laboratory of Green Process and Engineering, Beijing Engineering Research Centre of Process Pollution Control, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, 100190, China; Ganjiang Innovation Academy, Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths, Chinese Academy of Sciences, Ganzhou, 341000, China
| | - Min Li
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
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5
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Zhao X, Teng Z, Wang G, Luo W, Guo Y, Ji X, Hu W, Li M. Anaerobic syntrophic system composed of phosphate solubilizing bacteria and dissimilatory iron reducing bacteria induces cadmium immobilization via secondary mineralization. J Hazard Mater 2023; 446:130702. [PMID: 36587597 DOI: 10.1016/j.jhazmat.2022.130702] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/12/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
Secondary mineralization is a promising method for remediating cadmium (Cd) pollution in sediments, but the poor stability of Cd-containing secondary minerals is a bottleneck that limits the development of this approach. The existence of phosphate can enhance the formation of stable secondary minerals and points a new direction for Cd immobilization. In this research, a novel syntrophic system composed of phosphate solubilizing bacteria (PSB) and dissimilatory iron reducing bacteria (DIRB) was established and the effect and mechanism of Cd immobilization in the system were also explored. The results showed that under the conditions of DIRB:PSB (V:V)= 3:1, syntrophic bacteria dosage of 5% and glucose dosage of 5 g/L, Cd incorporated in the secondary minerals could account for about 60% of the total Cd. In the pH range of 5-9, alkaline environment was conducive to the immobilization of Cd and the percentage of combined Cd was up to 58%, while the combined Cd in secondary minerals decreased from 62% to 56% with the increase of initial Cd concentration from 0.1 to 0.3 mmol/L. In addition, XRD, XPS, Mössbauer and other characterization results showed that secondary minerals, such as Cd exchange hydroxyapatite (Cd-HAP) and kryzhanovskite (Fe3(PO4)2(OH)3) were formed in this new system. The established syntrophic system of PSB and DIRB is thus a prospective bioremediation technology for Cd immobilization in sediments and can avoid the potential risk might be caused by the addition of phosphorus-containing materials.
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Affiliation(s)
- Xin Zhao
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Zedong Teng
- Innovation Academy for Green Manufacture, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Key Laboratory of Green Process and Engineering, Beijing 100190, China; Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Gongting Wang
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Wenqing Luo
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Yali Guo
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai 200335, China
| | - Xiaonan Ji
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai 200335, China
| | - Wei Hu
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai 200335, China
| | - Min Li
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
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6
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Luo W, Zhao X, Wang G, Teng Z, Guo Y, Ji X, Hu W, Li M. Humic acid and fulvic acid facilitate the formation of vivianite and the transformation of cadmium via microbially-mediated iron reduction. J Hazard Mater 2023; 446:130655. [PMID: 36580773 DOI: 10.1016/j.jhazmat.2022.130655] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/30/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
The effects of humic acids (HA) and fulvic acids (FA) on the fate of Cd in anaerobic environment upon microbial reduction of Cd-bearing ferrihydrite (Fh) with Geobacter metallireducens were investigated. The results showed that HA and FA could promote the reductive dissolution of Fh and the formation of vivianite. After incubation of 38 d, vivianite accounted for 47.19%, 59.22%, and 48.53% of total Fe in biological control batch (BCK), HA and FA batches (C/Fe molar ratio of 1.0), respectively, by Mössbauer spectroscopy analysis. In terms of Cd, HA and FA could promote the release of adsorbed Cd during the initial bioreduction process, but reassuringly, after 38 d the dissolved Cd with HA and FA addition batches were 0.58-0.91 and 0.99-1.08 times of the BCK, respectively. The proportions of residual Cd in HA batches were higher than FA and BCK batches, indicating that HA was better than FA in immobilizing Cd. This might be because the quinone groups in HA could act as electron shuttle. This study showed that HA facilitated the transformation of vivianite better than FA, and Cd can be stabilized by resorption or co-precipitation with vivianite, providing a theoretical support for the translocation of Cd in sediment-water interface.
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Affiliation(s)
- Wenqing Luo
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Xin Zhao
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Gongting Wang
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Zedong Teng
- Innovation Academy for Green Manufacture, Key Laboratory of Green Process and Engineering, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Yali Guo
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai 200335, China
| | - Xiaonan Ji
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai 200335, China
| | - Wei Hu
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai 200335, China
| | - Min Li
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
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7
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Wang S, Teng Z, Li Y, Chen F, Liu X, Liu S, He J, Wang W. A novel vertical dual-loop reactor for rapid start-up of simultaneous partial nitrification and anammox process in treating landfill leachate: Performances and mechanisms. Bioresour Technol 2022; 364:127947. [PMID: 36100189 DOI: 10.1016/j.biortech.2022.127947] [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: 07/07/2022] [Revised: 09/06/2022] [Accepted: 09/07/2022] [Indexed: 06/15/2023]
Abstract
A novel vertical dual-loop reactor (VDLR) was developed to start and conduct a single-stage partial nitritation (PN) and anammox (PN/A) process for treating landfill leachate. Results showed that the total nitrogen (TN) removal reached 1.54 kg N/m3·d in the VDLR. It exhibited excellent mixing uniformity and buffer performance, which can increase the nitrogen removal performance up to 42.1 % via the improvement of anammox granular sludge activity (a particle size of 0.5-1 mm). Mass balance and microbial analysis indicated that the VDLR achieved efficient TN removal via anammox (99.24 %) and AOB (Nitrosomonas and Ellin6067) and anAOB (Candidatus kuenenia) played a vital role in this process.
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Affiliation(s)
- Siqi Wang
- Qingyan Environmental Technology Co. Ltd, Shenzhen 518057, China; Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China; School of Environment, Tsinghua University, Beijing 100084, China
| | - Zedong Teng
- Innovation Academy for Green Manufacture, Key Laboratory of Green Process and Engineering, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Yun Li
- Qingyan Environmental Technology Co. Ltd, Shenzhen 518057, China.
| | - Fuming Chen
- Qingyan Environmental Technology Co. Ltd, Shenzhen 518057, China
| | - Xu Liu
- Qingyan Environmental Technology Co. Ltd, Shenzhen 518057, China
| | - Shujie Liu
- Qingyan Environmental Technology Co. Ltd, Shenzhen 518057, China
| | - Juyuan He
- Qingyan Environmental Technology Co. Ltd, Shenzhen 518057, China
| | - Wei Wang
- School of Environment, Tsinghua University, Beijing 100084, China
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8
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Gu ZS, Huang Y, Costopoulos C, Jessney B, Bourantas C, Teng Z, Maehara A, Raber L, Stone G, Bennett MR. Heterogeneous plaque geometry is associated with major adverse cardiovascular events. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1208] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Objectives
To determine whether coronary artery plaque-lumen geometry predicts major adverse cardiovascular events (MACE), and incorporating geometric measures enhances risk stratification from intravascular imaging.
Background
Prospective studies show that only a minority of plaques with higher-risk features result in future MACE, indicating the need for more predictive markers of plaque vulnerability. Plaques show heterogeneous structures and plaque-lumen geometry, both of which can promote high plaque structural stress (PSS); however, the relationships between geometric heterogeneity and MACE or PSS are unknown.
Methods
We examined plaque-lumen curvature, irregularity, lumen aspect ratio (LAR), roughness, PSS and their longitudinal heterogeneity (Figure 1A) in 35 non-culprit lesions (NCL) associated with MACE and 66 propensity-matched no-MACE NCL from the PROSPECT (Providing Regional Observations to Study Predictors of Events in the Coronary Tree) study. Causes of heterogeneous geometry and PSS were examined using a separate group of co-registered virtual histology-intravascular ultrasound (VH-IVUS) and optical coherence tomography (OCT) images (n=53 plaques).
Results
Plaque geometry heterogeneity indices (HI) were increased in NCL MACE vs. no-MACE lesions across the whole plaque and peri-minimal luminal area (MLA) segments (HI curvature: p=0.002; HI irregularity: p<0.001; HI LAR: p=0.001; HI roughness: p=0.002). Peri-MLA HI roughness was an independent predictor of future MACE (hazard ratio: 3.69, p<0.001) (Figure 1B). Inclusion of HI roughness improved identification of NCLs leading to MACE in VH-defined thin-cap fibroatheromas (VH-TCFA, p=0.005), MLA ≤4mm2 (p=0.001), and plaque burden (PB) ≥70% (p<0.001) (Figure 1C–E), and further improved the ability of PSS to identify MACE NCLs in VH-TCFA (p=0.041), MLA ≤4mm2 (p=0.033), and PB ≥70% (p<0.001). HI roughness generally corresponded with HI PSS, but was also increased at sites of local calcification and multilayering.
Conclusions
Plaque-lumen geometric heterogeneity is increased across whole plaque and peri-MLA segments of NCLs causing MACE. Inclusion of geometric heterogeneity may improve the ability of intravascular imaging to predict MACE.
Funding Acknowledgement
Type of funding sources: Other. Main funding source(s): British Heart Foundation
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Affiliation(s)
- Z S Gu
- University of Cambridge , Cambridge , United Kingdom
| | - Y Huang
- University of Cambridge , Cambridge , United Kingdom
| | - C Costopoulos
- Royal Papworth Hospital , Cambridge , United Kingdom
| | - B Jessney
- University of Cambridge , Cambridge , United Kingdom
| | - C Bourantas
- Barts Heart Centre , London , United Kingdom
| | - Z Teng
- University of Cambridge , Cambridge , United Kingdom
| | - A Maehara
- Cardiovascular Research Foundation , New York , United States of America
| | - L Raber
- Bern University Hospital, Inselspital , Bern , Switzerland
| | - G Stone
- Cardiovascular Research Foundation , New York , United States of America
| | - M R Bennett
- University of Cambridge , Cambridge , United Kingdom
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9
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Wang G, Zhao X, Luo W, Yuan J, Guo Y, Ji X, Hu W, Li M, Teng Z. Noval porous phosphate-solubilizing bacteria beads loaded with BC/nZVI enhanced the transformation of lead fractions and its microecological regulation mechanism in soil. J Hazard Mater 2022; 437:129402. [PMID: 35738173 DOI: 10.1016/j.jhazmat.2022.129402] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/31/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
Soil lead pollution becomes a serious environmental problem. Microbial remediation has received widespread attentions due to high efficiency and no secondary pollution. In this research, a noval porous spherical phosphate-solubilizing bacteria bead loaded with biochar/nZVI (Bio-bead) was used to passivate lead in soil, and the effects and microecological regulation mechanisms of this process were also investigated. The results showed that the pH, OM, and AP of soil in the Bio-bead group were increased and the ORP was decreased over time compared with the blank group. The proportion of stable (oxidizable and residue) fractions of lead in Bio-bead group (45%) was much higher than that of the blank group (35%). In addition, the result of microbial community structure showed that Bio-beads did not change the species of dominant bacterial, excepting the abundance of Pseudomonas increased significantly and the abundance of Sphingomonas reduced during remediation. Redundancy analysis showed that pH, OM, AP and the ratio of residual and oxidizable fractions lead in soil were positively correlated with the abundance of Pseudomonas, while ORP was negatively correlated with the abundance of Pseudomonas. These findings have proved that Bio-bead is a potential strategy for remediation of lead-contaminated soil even in complexed soils.
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Affiliation(s)
- Gongting Wang
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China
| | - Xin Zhao
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China
| | - Wenqing Luo
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China
| | - Junjun Yuan
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China
| | - Yali Guo
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, PR China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai 200335, PR China
| | - Xiaonan Ji
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, PR China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai 200335, PR China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Wei Hu
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, PR China; YANGTZE Eco-Environment Engineering Research Center (Shanghai), China Three Gorges Corporation, Shanghai 200335, PR China
| | - Min Li
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China.
| | - Zedong Teng
- Innovation Academy for Green Manufacture, Key Laboratory of Green Process and Engineering, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China.
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He Q, Zhao H, Teng Z, Wang Y, Li M, Hoffmann MR. Phosphate removal and recovery by lanthanum-based adsorbents: A review for current advances. Chemosphere 2022; 303:134987. [PMID: 35597457 DOI: 10.1016/j.chemosphere.2022.134987] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 04/25/2022] [Accepted: 05/13/2022] [Indexed: 06/15/2023]
Abstract
Controlling eutrophication and recovering phosphate from water bodies are hot issues in the 21st century. Adsorption is considered to be the best method for phosphate removal because of its high adsorption efficiency and fast removal rate. Among the many adsorbents, lanthanum (La)-based adsorbents have been paid more and more attention due to their strong affinity to phosphorus. This paper reviews research of phosphate adsorption on La-based adsorbents in different La forms, including lanthanum oxide/hydroxide, lanthanum mixed metal oxide/hydroxide, lanthanum carbonate, La3+, La-based metal-organic framework (La-MOF) and La-MOF derivatives. The La-based adsorbents can be loaded on many carriers, such as carbon material, clay minerals, porous silica, polymers, industrial wastes, and others. We find that lanthanum oxide/hydroxide and La3+ adsorbents are mostly studied, while those in the forms of lanthanum carbonate, La-MOF, and La-MOF derivatives are relatively few. The kinetic process of most phosphate adsorption is pseudo-second-order and the isotherm process is in accordance with the Langmuir model. The cost of La-based and other traditional adsorbents was compared. The adsorption mechanisms are categorized as electrostatic attraction, ligand exchange, Lewis acid-base interaction, ion exchange and surface precipitation. Besides, regeneration methods of La-based adsorbents are mainly acid, alkali, and salt-alkali. In addition, the La-based adsorbents after absorbing phosphate can be directly used as a slow-release fertilizer. This review provides a basis for the research on phosphate adsorption by La-based adsorbents. It should be carried out to further develop La-based materials with high adsorption capacity and good regeneration ability. Meanwhile, studies have been conducted on the reuse of phosphate after desorption, which needs more attention in future research.
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Affiliation(s)
- Qinqin He
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Hongjun Zhao
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Zedong Teng
- Innovation Academy for Green Manufacture, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yin Wang
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Min Li
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Engineering Research Center for Water Pollution Source Control & Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
| | - Michael R Hoffmann
- Linde-Robinson Laboratories, California Institute of Technology, Pasadena, CA, 91125, United States.
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Wang Z, Liu L, Pang F, Zheng Z, Teng Z, Miao T, Fu T, Rushdi HE, Yang L, Gao T, Lin F, Liu S. Novel insights into heat tolerance using metabolomic and high-throughput sequencing analysis in dairy cows rumen fluid. Animal 2022; 16:100478. [PMID: 35247705 DOI: 10.1016/j.animal.2022.100478] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 01/29/2022] [Accepted: 01/31/2022] [Indexed: 01/10/2023] Open
Abstract
Heat stress influences rumen fermentative processes with effects on the physiology and production of dairy cows. However, the underlying relationship between rumen microbiota and its associated metabolism with heat tolerance in cows have not been extensively described yet. Therefore, the main objective of this study was to investigate differential heat resistance in Holstein cows using rumen bacterial and metabolome analyses. We performed both principal component analysis and membership function analysis to select seven heat-tolerant (HT) and seven heat-sensitive (HS) cows. Under heat stress conditions, the HT cows had a significantly (P < 0.05) higher propionic acid content than the HS cows; while measures of the respiratory rate, acetic, and butyric acid in the HT cows were significantly (P < 0.05) lower compared with the HS cows. Also, the HT cows showed lower (P < 0.01) rectal temperature and acetic acid to propionic acid ratio than the HS group of cows. Omics sequencing revealed that the relative abundances of Muribaculaceae, Rikenellaceae, Acidaminococcaceae, Christensenellaceae, Rikenellaceae_RC9_gut_group, Succiniclasticum, Ruminococcaceae_NK4A214_group and Christensenellaceae_R-7_group were significantly (P < 0.01) higher in the HT cows; whereas Prevotellaceae, Prevotella_1, Ruminococcaceae_UCG-014, and Shuttleworthia were significantly (P < 0.01) lower in HT cows compared to HS cows. Substances mainly involved in carbohydrate metabolism, including glycerol, mannitol, and maltose, showed significantly higher content in the HT cows (P < 0.05) compared to that in the HS cows. Simultaneously, distinct metabolites were significantly correlated with differential bacteria, suggesting that glycerol, mannitol, and maltose could serve as potential biomarkers for determining heat resistance that require further study. Overall, distinct changes in the rumen microbiota and metabolomics in the HT cows may be associated with a better adaptability to heat stress. These findings suggest their use as diagnostic tools of heat tolerance in dairy cattle breeding schemes.
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Affiliation(s)
- Z Wang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - L Liu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - F Pang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - Z Zheng
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - Z Teng
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang, People's Republic of China
| | - T Miao
- Henan Huahua Niu Dairy Co., Ltd, Zhengzhou, People's Republic of China
| | - T Fu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - H E Rushdi
- Department of Animal Production, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt
| | - L Yang
- College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, People's Republic of China
| | - T Gao
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - F Lin
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - S Liu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China.
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12
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Wang L, Chen X, Han L, Jin B, Han W, Jia J, Bai X, Teng Z. EPIGENETIC FACTORS OF SERUM URIC ACID LEVEL AND RELATED GENE POLYMORPHISMS IN SHENYANG, CHINA. Acta Endocrinol (Buchar) 2022; 18:1-12. [PMID: 35975251 PMCID: PMC9365425 DOI: 10.4183/aeb.2022.1] [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] [Indexed: 06/15/2023]
Abstract
BACKGROUND The purpose of this study was to explore the influencing factors of serum uric acid (SUA) level and related gene polymorphisms in the healthy population. METHODS A total of 346 healthy individuals screened from different areas in Shenyang City and 195 patients with high SUA levels were included. RESULTS The levels of TC (total cholesterol), HDL-C (high-density lipoprotein cholesterol), LDL-C (low-density lipoprotein cholesterol), TG (triglycerides), GLU (blood glucose) ALT (alanine aminotransferase), TBA (total bile acid), TBIL (total bilirubin), CR (creatinine) and CYSC (Cystatin C) were statistically different between the healthy and hyperuricemia population (P<0.05). However, there was no statistical difference in the UA level between the two groups (P>0.05). After adjusting for UA, TC, HDL-C, LDL-C, GLU, TBIL and CYSC, the additive and recessive models of rs2231142 were statistically significant in females (P<0.05). For males, haplotypes of A-C-A-A-G-G, A-C-G-C-G-G and A-T-G-A-A-G had significant difference between the healthy and hyperuricemia population (P<0.05). For females, the haplotypes of A-C-G-C-G-G and A-T-A-C-A-T had significant differences (P<0.05). CONCLUSION The distributions of SLC2A9 (solute carrier family 2 and facilitated glucose transporter member 9), ABCG2 (ATP-binding cassette G2), GCKR (glucokinase regulatory protein), KCNQ1, IGFIR (Insulin-like growth factor-I receptor) and VEGFR (Vascular Endothelial Growth Factor Receptor) were balanced in the population in Shenyang City. The haplotypes of A-C-A-A-G-G, A-C-G-C-G-G and A-T-G-A-A-G were the influencing factors of high SUA in the population in Shenyang City.
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Affiliation(s)
- L. Wang
- The First Affiliated Hospital of China Medical University, Dept. of General Practice, Shenyang, Liaoning, China
| | - X. Chen
- The First Affiliated Hospital of China Medical University, Dept. of General Practice, Shenyang, Liaoning, China
| | - L. Han
- Shengjing Hospital of China Medical University, Shenyang, Liaoning, Shenyang, Liaoning, China
| | - B. Jin
- Dalian Medical University, Dalian, Liaoning, Dept. of Gerontology and Geriatrics, Shenyang, Liaoning, China
| | - W. Han
- Shengjing Hospital of China Medical University, Shenyang, Liaoning, Shenyang, Liaoning, China
| | - J. Jia
- Jixian Community Health Service Centre, Heping District, Dept. of General Practice, Shenyang, Liaoning, China
| | - X. Bai
- Shengjing Hospital of China Medical University, Shenyang, Liaoning, Shenyang, Liaoning, China
| | - Z. Teng
- The First Hospital of China Medical University, Dept. of Medical Oncology, Shenyang, Liaoning, China
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13
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Teng Z, Zhu Y, Teng Y, Long Q, Hao Q, Yu X, Yang L, Lv Y, Liu J, Zeng Y, Lu S. The analysis of osteosarcopenia as a risk factor for fractures, mortality, and falls. Osteoporos Int 2021; 32:2173-2183. [PMID: 33877382 DOI: 10.1007/s00198-021-05963-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 04/14/2021] [Indexed: 12/14/2022]
Abstract
UNLABELLED Osteosarcopenia is defined as the concomitant occurrence of sarcopenia and osteoporosis/osteopenia. This study aimed to clarify whether osteosarcopenia implies a greater risk of fractures, mortality, and falls and to draw attention to osteosarcopenia. INTRODUCTION Osteosarcopenia, which is characterized by the co-existence of osteoporosis/osteopenia and sarcopenia, is one of the most challenging geriatric syndromes. However, the association between osteosarcopenia and the risk of falls, fractures, disability, and mortality is controversial. METHODS We searched PubMed, Embase, and the Cochrane Central Register of Controlled Trials, from their inception to March 18, 2021, for cohort studies on the relationship between osteosarcopenia and fractures, falls, and mortality. Two reviewers independently extracted data and assessed study quality. A pooled analysis was performed to calculate odds ratios (ORs) and 95% confidence intervals (CIs) using fixed or random-effects models. RESULTS Eight cohort studies including 19,836 participants showed that osteosarcopenia significantly increased the risk of fracture (OR 2.46, 95% CI 1.83-3.30, Pheterogeneity = 0.006, I2 = 63.0%), three cohort studies involving 2601 participants indicated that osteosarcopenia significantly increased the risk of mortality (OR 1.66, 95% CI 1.23-2.26, Pheterogeneity = 0.214, I2 = 35.2%), and three cohort studies involving 3144 participants indicated that osteosarcopenia significantly increased the risk of falls (OR 1.62, 95% CI 1.28-2.04, Pheterogeneity = 0.219, I2 = 34.1%). No publication bias existed among the studies regarding the association between osteosarcopenia and fractures. The findings were robust according to the subgroup and sensitivity analyses. CONCLUSIONS This pooled analysis demonstrated that osteosarcopenia significantly increased the risk of fractures, falls, and mortality, thus highlighting its relevance in daily life. Therefore, we suggest that elderly persons should be aware of the risks associated with osteosarcopenia.
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Affiliation(s)
- Z Teng
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
- Yunnan Key Laboratory of Digital Orthopedics, The First People's Hospital of Yunnan Province, Kunming, China
- Graduate School of Kunming Medical University, Kunming, China
| | - Y Zhu
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
| | - Y Teng
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
| | - Q Long
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
| | - Q Hao
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
| | - X Yu
- Graduate School of Kunming Medical University, Kunming, China
| | - L Yang
- Graduate School of Kunming Medical University, Kunming, China
| | - Y Lv
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China
| | - J Liu
- Graduate School of Kunming Medical University, Kunming, China
| | - Y Zeng
- The Sixth Affiliated Hospital of Kunming Medical University, Kunming, Yuxi, China.
| | - S Lu
- Yunnan Key Laboratory of Digital Orthopedics, The First People's Hospital of Yunnan Province, Kunming, China.
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14
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Teng Z, Zhao X, Yuan J, Li M, Li T. Phosphate functionalized iron based nanomaterials coupled with phosphate solubilizing bacteria as an efficient remediation system to enhance lead passivation in soil. J Hazard Mater 2021; 419:126433. [PMID: 34323720 DOI: 10.1016/j.jhazmat.2021.126433] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 06/15/2021] [Accepted: 06/16/2021] [Indexed: 06/13/2023]
Abstract
Bioremediation technology has attracted increasing interest due to it efficient, economical and eco-friendly to apply to heavy metal contaminated soil. This study presents a new biological remediation system with phosphate functionalized iron-based nanomaterials and phosphate solubilizing bacterium strain Leclercia adecarboxylata. Different phosphate content functionalized iron-based nanomaterials were prepared, and nZVI@C/P1 (nP: nFe: nC=1:10:200) with high passivation efficiency was selected to combine with PSB for the remediation experiments. The change in lead fraction and microbial community under five conditions (CK, PSB, nZVI@C, nZVI@C/P1, nZVI@C/P1 + PSB) during 10 days incubation were investigate. The results indicated that nZVI@C/P1 + PSB increased the residual fraction of lead by 93.94% compared with the control group. Meanwhile, inoculation of Leclercia adecarboxylata became the dominant microflora in the soil microbial community during the remediation time, improving the utilization rate of phosphate in nZVI@C/P1 and enhancing the passivation efficiency of lead. Experimental findings demonstrated that combining nZVI@C/P1 with PSB could be considered as an efficient strategy for the lead contaminated soil remediation.
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Affiliation(s)
- Zedong Teng
- Innovation Academy for Green Manufacture, Key Laboratory of Green Process and Engineering, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; College of Environmental Science and Engineering, Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xin Zhao
- College of Environmental Science and Engineering, Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China
| | - Junjun Yuan
- College of Environmental Science and Engineering, Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China
| | - Min Li
- College of Environmental Science and Engineering, Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China.
| | - Tinggang Li
- Innovation Academy for Green Manufacture, Key Laboratory of Green Process and Engineering, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Ganjiang Innovation Academy, Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths, Chinese Academy of Science, Ganzhou 321119, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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15
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Qu X, Liu Y, Teng Z, Zhang Y, Zheng D, Man L, Wang Z, Wang Y, Zhang J, Zhang H, Liu J, Chen H, Xiao W, Jiang Y, Zhang J, Liu S, Wang C. 422P The efficacy and safety of irinotecan plus raltitrexed as second-line treatment in advanced colorectal cancer (ACC) patients: A summary analysis of a multicenter, phase II trial. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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16
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Taieb J, Hammel P, Reni M, Palmer D, Bridgewater J, Cubillo A, Prager G, Bayle S, Hédouin-Biville F, Teng Z, Seufferlein T, Macarulla T. SO-3 Treatment sequences and prognostic factors in metastatic pancreatic ductal adenocarcinoma: Univariate and multivariate analyses of a real-world study in Europe. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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17
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Wei MY, Lv RR, Teng Z. Circular RNA circHIPK3 as a novel circRNA regulator of autophagy and endothelial cell dysfunction in atherosclerosis. Eur Rev Med Pharmacol Sci 2021; 24:12849-12858. [PMID: 33378035 DOI: 10.26355/eurrev_202012_24187] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The aim of the study was to explore the role and mechanism of circHIPK3 in atherosclerosis. MATERIALS AND METHODS AS model was constructed in vivo and in vitro for high fat-fed and ox-LDL treatment. RT-PCR was used to assess the level of circHIPK3. The autophagy level of HUVECs was detected by Western blot, transmission electron microscopy, and LC3II fluorescence intensity. HUVECs lipid accumulation was assessed by oil red staining. Luciferase assay was performed to verify the relationship of circRNA and miRNA, miRNA, and target gene. RESULTS The expression of circHIPK3 was downregulated in HFD mice, and ox-LDL treated HUVECs. The level of autophagy was decreased in AS, which was reversed by overexpression of circHIPK3. Meanwhile, forced expression of circHIPK3 would reduce the accumulation of lipid in HUVECs. CONCLUSIONS CircHIPK3 could inhibit lipid content in ox-LD-treated HUVECs via activating autophagy. This progression mechanism may target the miR-190b/ATG7 signal pathway, which indicates a suitable role in the pathogenesis of atherosclerosis.
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Affiliation(s)
- M-Y Wei
- Cardiovascular Department, Cangzhou Central Hospital, Cangzhou, Hebei Province, China.
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18
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Jia FY, Guo W, Sun L, Zhang T, Xu B, Teng Z, Lou YJ, Tao D, Zhou H, Zhang D, Gao Y. Effects of Dietary Fiber on Growth Performance, Fat Deposition, Fat Metabolism, and Expression of Lipoprotein Lipase Mrna in Two Breeds of Geese. Braz J Poult Sci 2021. [DOI: 10.1590/1806-9061-2020-1287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- FY Jia
- The Ministry of Education, China; Jilin Agricultural University, China
| | - W Guo
- Jilin Agricultural University, China
| | - L Sun
- The Ministry of Education, China; Jilin Agricultural University, China
| | - T Zhang
- Jilin Province Science and Technology Innovation Platform Management Center, China
| | - B Xu
- The Ministry of Education, China; Jilin Agricultural University, China
| | - Z Teng
- Jilin Agricultural University, China
| | - YJ Lou
- The Ministry of Education, China
| | - D Tao
- Jilin Agricultural University, China
| | - H Zhou
- The Ministry of Education, China; Jilin Agricultural University, China
| | - D Zhang
- The Ministry of Education, China; Jilin Agricultural University, China
| | - Y Gao
- The Ministry of Education, China
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Zhang K, Teng Z, Shao W, Wang Y, Li M, Lam SS. Effective passivation of lead by phosphate solubilizing bacteria capsules containing tricalcium phosphate. J Hazard Mater 2020; 397:122754. [PMID: 32361140 DOI: 10.1016/j.jhazmat.2020.122754] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 03/26/2020] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
Phosphate solubilizing bacteria (PSBs) shows high potential to be used for lead passivation in sediments due to the abilities of releasing phosphate and the subsequent formation of insoluble Pb-phosphate compounds. In this research, microbial capsules implemented with sodium alginate and CaCl2, containing Leclercia adecarboxylata L15 (a lead resistant PSB) and Ca3(PO4)2, were developed and the performance on lead passivation under different conditions was examined. The optimal concentrations of sodium alginate and CaCl2 for formulating the capsules were determined to be 0.3% and 10%, respectively. The removal efficiency of Pb2+ by capsules containing L15 and Ca3(PO4)2 was up to 98% with a capsule dosage of 2%, initial Pb2+ concentration of 1mM and pH of 3.0, which was better than that of free L15 (18%) and capsules containing only L15 (34%). Lead was immobilized via the formation of Pb5(PO4)3Cl on the surface and Pb3(PO4)2 in the interior of the capsules. The simulated sediment remediation experiments showed that the acid soluble fraction of lead reduced from 28% to 14% and transformed into more stable fractions after 10 days. The experiment results indicated that PSBs capsules coupled with phosphate materials have a great promise for application in remediation of lead contaminated sediments.
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Affiliation(s)
- Keyao Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution. Beijing Forestry University, Beijing 100083, China
| | - Zedong Teng
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution. Beijing Forestry University, Beijing 100083, China
| | - Wen Shao
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution. Beijing Forestry University, Beijing 100083, China
| | - Yin Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution. Beijing Forestry University, Beijing 100083, China
| | - Min Li
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution. Beijing Forestry University, Beijing 100083, China.
| | - Su Shiung Lam
- Pyrolysis Technology Research Group, Institute of Tropical Aquaculture and Fisheries Research (Akuatrop) & Institute of Tropical Biodiversity and Sustainable Development (Bio-D Tropika), Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
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20
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Teng Z, Shao W, Zhang K, Yu F, Huo Y, Li M. Enhanced passivation of lead with immobilized phosphate solubilizing bacteria beads loaded with biochar/ nanoscale zero valent iron composite. J Hazard Mater 2020; 384:121505. [PMID: 31776085 DOI: 10.1016/j.jhazmat.2019.121505] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 10/03/2019] [Accepted: 10/18/2019] [Indexed: 06/10/2023]
Abstract
Phosphate solubilizing bacteria (PSBs) can effectively enhance the stability of lead via the formation of insoluble Pb-phosphate compounds. This research presents a bio-beads, which was implemented with the help of a self-designed porous spheres carrier, by immobilized PSBs strains Leclercia adecarboxylata (hereafter referred as L1-5). In addition, the passivation efficiency of lead via bio-beads under different conditions and its mechanism were also investigated in this study. The results indicated that phosphate solubilized by bio-beads could reach 30 mg/L in Ca3(PO4)2 medium containing 1 mM Pb2+, and the highest removal rate of Pb2+ in beef peptone liquid medium could reach 93%, which is better than that of free bacteria. Furthermore, it was also concluded that the lead could be transformed into stable crystal texture, such as Pb5(PO4)3Cl and Pb5(PO4)3OH. Both hydrophobic and hydrophilic groups in the bio-beads could capture Pb2+, which indicated that electrostatic attraction and ion-exchange were also the mechanism of Pb2+ adsorption. All the experimental findings demonstrated that this bio-bead could be consider as an efficient way for the lead immobilization in contaminated soil in the future.
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Affiliation(s)
- Zedong Teng
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution. Beijing Forestry University, Beijing 100083, China
| | - Wen Shao
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Department of Geoscience, Eberhard Karls Universität Tübingen, Tübingen 72074, Germany
| | - Keyao Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution. Beijing Forestry University, Beijing 100083, China
| | - Fulu Yu
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; School of Chemical Science and Engineering, Tongji University, Shanghai 200940, China
| | - Yaoqiang Huo
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
| | - Min Li
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution. Beijing Forestry University, Beijing 100083, China.
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21
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Teng Z, Zhu J, Shao W, Zhang K, Li M, Whelan MJ. Increasing plant availability of legacy phosphorus in calcareous soils using some phosphorus activators. J Environ Manage 2020; 256:109952. [PMID: 31818749 DOI: 10.1016/j.jenvman.2019.109952] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 11/26/2019] [Accepted: 11/30/2019] [Indexed: 06/10/2023]
Abstract
Legacy phosphorus (P) in soil, accumulated over several years of fertilizer application in excess of crop demand, represents a huge and largely untapped resource. P activators can increase the availability of this P to plants by accelerating its transformation into soluble P fractions. In this study, we evaluated the potentials of four "P activators" (oxalic acid, lignin, phytase and ascorbic acid) to increase plant available P in a laboratory incubation experiment with two P-deficient calcareous soils used for wheat production. Samples were analysed for Olsen P, phosphomonoesterase and with Hedley sequential P fractionation. All four treatments had significant effects on different soil P fractions. Oxalic acid mainly enhanced inorganic P (Pi) solubility from the HCl-extractable P pool. Lignin enhanced P lability from the NaOH-, HCl- and residual-P pools. Phytase and ascorbic acid principally affected the organic P fractions (Po). Oxalic acid and lignin showed most potential to improve P (H2O-P, NaHCO3-Pi and NaHCO3-Po) availability, which increased by 110-419% and 4.1-122%, respectively. These findings illustrated the potential mechanisms responsible for P release associated with different P activators and reinforced the case for their use in increasing legacy P availability for agriculture in calcareous soils.
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Affiliation(s)
- Zedong Teng
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Jing Zhu
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Hubei Institute of Urban Planning and Design, Wuhan, Hubei, 430071, China
| | - Wen Shao
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Keyao Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Min Li
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
| | - Michael J Whelan
- School of Geography, Geology and the Environment, University of Leicester, Leicester, UK
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22
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Teng Z, Chen Z, Zhang Q, Yao Y, Song M, Li M. Isolation and characterization of phosphate solubilizing bacteria from rhizosphere soils of the Yeyahu Wetland in Beijing, China. Environ Sci Pollut Res Int 2019; 26:33976-33987. [PMID: 30145765 DOI: 10.1007/s11356-018-2955-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
Phosphate solubilizing bacteria (PSB) can convert insoluble forms of phosphorus (P) to accessible forms. 11 strains of PSB, including five inorganic phosphate solubilizing bacteria (IPSBs) and six organic phosphate solubilizing bacteria (OPSBs), were isolated from rhizosphere soils of three plants Scirpus planiculmis, Zizania latifolia, and Phrnagmites australis in the Yeyahu Wetland of Beijing, China to investigate P-solubilizing activities. In addition, the distributions of P fractions in soil samples were also observed. All strains evaluated above 1.0 by the ratio of transparent circle diameter to colony diameter (D/d) on Ca3(PO4)2 or lecithin plates were identified by 16S rRNA sequencing. Results showed that Ca-bound P (Ca-P) was the main species of inorganic P (IP), and highly resistant organic P (HR-OP) accounted for the most part of organic P (OP). These strains were identified as bacterial species of Enterobacter asburiae, Acinetobacter sp., Bacillus cereus strain, and so on. The most efficient IPSB strain could convert over 430 mg L-1 orthophosphate, while the equivalent OPSB strain only liberated less than 4 mg L-1 in liquid culture, which indicated that IPSBs have a better P-solubilizing ability than OPSBs in rhizosphere soils of the Yeyahu Wetland and IPSBs are likely to regulate the P transformation process in this wetland. Graphical abstract ᅟ.
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Affiliation(s)
- Zedong Teng
- College of Environmental Science and Engineering, Beijing Forestry University, 60#, 35# Qinghua East Rd., Haidian District, Beijing, 100083, People's Republic of China
| | - Zhiping Chen
- College of Environmental Science and Engineering, Beijing Forestry University, 60#, 35# Qinghua East Rd., Haidian District, Beijing, 100083, People's Republic of China
| | - Qing Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, 60#, 35# Qinghua East Rd., Haidian District, Beijing, 100083, People's Republic of China
| | - Yi Yao
- College of Environmental Science and Engineering, Beijing Forestry University, 60#, 35# Qinghua East Rd., Haidian District, Beijing, 100083, People's Republic of China
| | - Mingyang Song
- College of Environmental Science and Engineering, Beijing Forestry University, 60#, 35# Qinghua East Rd., Haidian District, Beijing, 100083, People's Republic of China
| | - Min Li
- College of Environmental Science and Engineering, Beijing Forestry University, 60#, 35# Qinghua East Rd., Haidian District, Beijing, 100083, People's Republic of China.
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23
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Kuang XZ, Xiao WJ, Teng Z, Pan H, Yuan ZA, Wu F, Zhang X. [Pathogenic characteristics of viral gastroenteritis among pediatric inpatients under five years old during 2014-2017]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:895-899. [PMID: 31484250 DOI: 10.3760/cma.j.issn.0254-6450.2019.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To conduct a viral pathogen surveillance program on pediatric inpatients less than five years old with acute gastroenteritis in Shanghai and to better understand the pathogenic spectrum and molecular features in the target population, for setting up programs on control, prevention, medication and vaccine applications of the diseases. Methods: Fecal samples were collected from inpatients less than 5 years old who were admitted to a pediatric hospital for having acute gastroenteritis. Information related to demographic, clinical and epidemiological features of the patients was also collected. Laboratory assays including ELISA, real-time PCR and nested PCR, were performed to detect the presence of pathogens as rotavirus, calicivirus, astrovirus and adenovirus. Results: A total of 1 018 samples were collected (male 671 and 347 female), with the positive detection rate as 40.57% which peaked from autumn till winter, annually. Calicivirus and rotavirus A presented with the highest detection rates (24.75% and 13.95% respectively). The lowest detection rate was found in the 0-6 month-olds (32.20%). 65% of the patients with positive virus had received antibiotic treatment prior to the hospitalization. However, no statistically significant difference was seen, regarding the rates of antibiotic medication in the virus positive or negative populations (P>0.05). Data from the Rotavirus genotype analysis revealed that G9P[8] genotype was the predominant strain, and causing majority of rotavirus infections in all the age groups. Conclusions: Among the inpatients under 5 years of age in Shanghai, the positive detection rate for Calicivirus was higher than that for rotavirus group A, suggesting the necessity to carefully monitor the changes regarding the pathogenic spectrum and subtypes of the virus. Antibiotics should also be attentively administered, together with the development of suitable vaccine.
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Affiliation(s)
- X Z Kuang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - W J Xiao
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Z Teng
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H Pan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Z A Yuan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - F Wu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China; Shanghai Institutes of Preventive Medicine, Shanghai 200336, China
| | - X Zhang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
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24
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Zheng YX, Chen J, Kong DC, Pan H, Zhou YQ, Chen ML, Teng Z, Wu HY, Yuan ZA. [Pathogenic characteristics of hospitalized severe acute respiratory infections in Shanghai, China, 2015-2017]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:911-916. [PMID: 31484253 DOI: 10.3760/cma.j.issn.0254-6450.2019.08.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the epidemiological and pathogenic characteristics of hospitalized severe acute respiratory infections (SARI) in Shanghai, China. Methods: From 2015 to 2017, one Tertiary hospital and one Secondary hospital were chosen as the surveillance sites. Two respiratory tract specimens per case were collected from SARI cases aged 15 years and older. One specimen was tested for 22 respiratory pathogens by RT-PCR, and the other specimen was cultured for 6 respiratory bacteria. Results: A total of 287 SARI cases were enrolled for sampling and lab testing. 70.73% of the cases were aged 60 years and older, with 41.46% (119/287) were positive for at least one pathogen. Influenza virus was the predominant pathogen, accounting for 17.77% (51/287) of all SARI cases. Human rhinovirus/Enterovirus and Coronavirus were both accounting for 7.32% (21/287), followed by Mycoplasma pneumoniae (5.57%, 16/287). The positive rates of parainfluenza virus, bocavirus, adenovirus, respiratory syncytial virus and human metapneumo virus were all less than 5%. Bacterial strains were identified in seven SARI cases, including Klebsiella pneumoniae (3 strains), Staphylococcus aureus (2 strains), Streptococcus pneumoniae (1 strain) and Pseudomonas aeruginosa (1 strain). Two or Three pathogens were co-detected from 40 cases, accounting for 33.61% of 119 positive cases. The most common co-detected pathogens were influenza virus and Mycoplasma pneumoniae (10 cases). Influenza cases peaked in winter-spring and summer. Mycoplasma pneumoniae peaked in winter-spring season and overlapped with influenza. The positive rates of pathogens were not significantly different between different age groups. Conclusions: Various respiratory pathogens can be detected from SARI cases aged 15 years and older. Influenza virus was the predominant pathogen and the co-detection of influenza virus with Mycoplasma pneumoniae the most common one.
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Affiliation(s)
- Y X Zheng
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China; Fudan University, Shanghai 200032, China
| | - J Chen
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - D C Kong
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H Pan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Y Q Zhou
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - M L Chen
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Z Teng
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - H Y Wu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
| | - Z A Yuan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
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25
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Lin S, Pan H, Xiao WJ, Gong XH, Kuang XZ, Teng Z, Zhang X, Wu HY. [Epidemiologic characteristics of Norovirus among adult patients with infectious diarrhea, in Shanghai, 2013-2018]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:883-888. [PMID: 31484248 DOI: 10.3760/cma.j.issn.0254-6450.2019.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Objective: To investigate the epidemiologic characteristics of Norovirus among adult patients suffering from infectious diarrhea in Shanghai, so as to provide evidence for developing related strategies on prevention and control of the disease. Methods: Diarrheal outpatients were monitored at the 'Intestinal clinic' from 22 hospitals involved in the sentinel surveillance program in Shanghai. Information on demographic and epidemiologic features of the patients was collected while data and clinical, fecal specimens were collected and sent to the district CDC for Norovirus detection. Positive rates of Norovirus were also compared in various populations and seasons during 2013-2018. Multivariate logistic regression model was adopted to fit into the comparisons between non-Norovirus and Norovirus groups. Results: 19.28% of the 12 083 diarrheal cases were found to have carried the Norovirus, with GⅡgroup the most commonly identified genotype. Rates of detection was seen higher in males (20.78%) than in females (17.73%). 30-44 year-old were found having the highest positive rate (21.51%). The positive rates were found the highest (23.60%) in the year of 2015. All the above shown differences were statistically significant (P<0.05). Diarrheal patients affected with Norovirus would present watery stool (75.94%) and vomiting (35.84%). Data from the multivariate logistic analysis showed that factors as: being males, 30-44 years old, officials/clerks, in winter season and with histories of travelling etc., were related to higher risks on Norovirus infection. Conclusions: Infectious diarrhea caused by Norovirus occurred all year round, with seasonal peaks seen in winter and spring, in Shanghai. Specific prevention and control measures should be taken on Norovirus- caused infectious diarrhea, according to the difference on age, gender and season.
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Affiliation(s)
- S Lin
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
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26
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Teng Z, Shao W, Zhang K, Huo Y, Li M. Characterization of phosphate solubilizing bacteria isolated from heavy metal contaminated soils and their potential for lead immobilization. J Environ Manage 2019; 231:189-197. [PMID: 30342331 DOI: 10.1016/j.jenvman.2018.10.012] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 09/29/2018] [Accepted: 10/04/2018] [Indexed: 06/08/2023]
Abstract
Phosphate solubilizing bacteria (PSB) were isolated from heavy metal contaminated soils and their potentials for lead (Pb) immobilization in soil were studied in this paper. 53 PSB strains were isolated and their minimum inhibitory concentrations (MICs) for lead were determined. The results showed that strains B3, B4, B10, F2-1 and L1-5 had relatively high lead resistant capabilities with MICs ranged from 0.5 to 8 mM, and were identified as species of Leclercia adecarboxylata and Pseudomonas putida by 16S rRNA. The most efficient PSB strains could solubilize 200 mg L-1 of P, and phosphate solubilizing capacity of those PSBs was related to the concentrations of organic acids, acid phosphatase activity and pH. Furthermore, the growth pattern of L1-5 strain with the presence of Pb(NO3)2 was observed and a mechanism of biomineralization of lead ions in bacteria biomass was determined by FT-IR and XRD analyses. Results showed that high concentration of lead can inhibit the growth of PSBs, and L1-5 isolate can transform lead ions into lead hydroxyapatite and pyromorphite. The PSBs, which possessing the properties of immobilizing lead through phosphate solubilization and biomineralization could be exploited for bioremediation of Pb polluted soils in future.
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Affiliation(s)
- Zedong Teng
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China
| | - Wen Shao
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China
| | - Keyao Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China
| | - Yaoqiang Huo
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China
| | - Min Li
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China; Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China.
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27
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Teng Z, Zhu Y, Li M, Whelan MJ. Microbial community composition and activity controls phosphorus transformation in rhizosphere soils of the Yeyahu Wetland in Beijing, China. Sci Total Environ 2018; 628-629:1266-1277. [PMID: 30045548 DOI: 10.1016/j.scitotenv.2018.02.115] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 02/10/2018] [Accepted: 02/10/2018] [Indexed: 06/08/2023]
Abstract
Microorganisms in the rhizosphere of wetland plants can have a significant impact on phosphorus (P) interception. We investigated the seasonal pattern of microbial community structure and its relationship with different P forms in the rhizosphere of three plants Scirpus planiculmis, Zizania latifolia, and Phragmites australis from the Yeyahu Wetland, China. Chloroform fumigation-extraction was used to determine the soil microbial biomass P (SMBP) and phospholipid fatty acids (PLFA) were used to characterize microbial community composition. P fractions in rhizosphere soil samples were also observed using sequential chemical fractionation. Results showed that the average total PLFA (TPLFA) contents of rhizosphere soils ranged from 34.9 to 40.7nmol·g-1 and were highest in summer. Bacteria were predominant in the rhizospheres of all three plants, accounting for >63% of TPLFA. Aerobic bacteria, represented by 16:0 PLFA, were most abundant. Both organic P (OP) and inorganic P (IP) accumulated in the rhizosphere during the winter die-back phase. Furthermore, both TPLFA and bacterial PLFA decreased with increases in highly resistant OP (HR-OP), occluded P (Oc-P) and Calcium-bound P (Ca-P). This suggests that bacteria play an important role in P transformation and can make use of various P forms. We also found that SMBP was significantly negatively correlated with labile OP (L-OP), moderately labile OP (ML-OP) and HR-OP, reflecting a high degree of cross correlation between SMBP and the PLFA indices.
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Affiliation(s)
- Zedong Teng
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Yunyun Zhu
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Min Li
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
| | - Michael J Whelan
- School of Geography, Geology and the Environment, University of Leicester, Leicester, UK
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28
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Zhu C, Tian X, Degnan AJ, Shi Z, Zhang X, Chen L, Teng Z, Saloner D, Lu J, Liu Q. Clinical Significance of Intraplaque Hemorrhage in Low- and High-Grade Basilar Artery Stenosis on High-Resolution MRI. AJNR Am J Neuroradiol 2018; 39:1286-1292. [PMID: 29794236 DOI: 10.3174/ajnr.a5676] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 03/29/2018] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Intraplaque hemorrhage within intracranial atherosclerotic plaques identified by high-resolution MR imaging has been studied as a potential marker of stroke risk. However, previous studies only examined intracranial arteries with high-grade stenosis (degree of stenosis, >50%). This study aimed to ascertain the clinical relevance of intraplaque hemorrhage in patients with low- and high-grade stenotic basilar artery plaques. MATERIALS AND METHODS Patients with basilar artery stenosis (n = 126; mean age, 62 ± 10 years; 66 symptomatic and 60 asymptomatic) underwent high-resolution MR imaging. The relationship between imaging findings (intraplaque hemorrhage, contrast enhancement, degree of stenosis, minimal lumen area, and plaque burden) and symptoms was analyzed. RESULTS Intraplaque hemorrhage was identified in 22 patients (17.5%), including 21 (31.8%) symptomatic patients and 1 (1.7%) asymptomatic patient. Multivariate analysis showed that intraplaque hemorrhage was the strongest independent marker of symptomatic status (odds ratio, 27.5; 95% CI, 3.4-221.5; P = .002). Contrast enhancement was also independently associated with symptomatic status (odds ratio, 9.9; 95% CI, 1.5-23.6; P = .016). Stenosis, minimal lumen area, and plaque burden were not correlated with symptoms (P > .05). Intraplaque hemorrhage was present in both low- and high-grade stenotic basilar arteries (11.3% versus 16.3%, P = .63). Diagnostic performance values of intraplaque hemorrhage for patients with acute/subacute symptomatic stroke were the following: specificity, 98.3%; sensitivity, 31.8%; positive predictive value, 95.5%; and negative predictive value, 56.7%. CONCLUSIONS Intraplaque hemorrhage is present in both low- and high-grade stenotic basilar artery plaques and is independently associated with symptomatic stroke status. Intraplaque hemorrhage may identify high-risk plaque and provide new insight into the management of patient with stroke without significant stenosis.
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Affiliation(s)
- C Zhu
- From the Department of Radiology and Biomedical Imaging (C.Z., D.S.), University of California, San Francisco, San Francisco, California
| | - X Tian
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
| | - A J Degnan
- Department of Radiology (A.J.D.), Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Z Shi
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
| | - X Zhang
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
| | - L Chen
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
| | - Z Teng
- Department of Radiology (Z.T.), University of Cambridge, Cambridge, UK
| | - D Saloner
- From the Department of Radiology and Biomedical Imaging (C.Z., D.S.), University of California, San Francisco, San Francisco, California
| | - J Lu
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
| | - Q Liu
- Department of Radiology (X.T., Z.S., X.Z., L.C., J.L., Q.L.), Changhai Hospital, Shanghai, China
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29
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Liu E, Zhang YX, Sun LL, Teng Z, Wang AB, Han HB, Yan JH. [Role of aquaporin-4 in the change of interstitial fluid drainage in Alzheimer's disease]. Beijing Da Xue Xue Bao Yi Xue Ban 2018; 50:203-206. [PMID: 29643515] [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: 06/08/2023]
Abstract
OBJECTIVE To observe the characteristics of the interstitial fluid (ISF) drainage in the Alzheimer's disease (AD) rats through magnetic resonance imaging (MRI) tracer gadolinium-diethylene triamine pentacetic acid (Gd-DTPA)spread in the brain extracellular space (ECS) and to discuss the role of aquaporin-4 (Aqp4) in the AD. METHODS Wild type SD rats (300-350 g) and Aqp4 gene knock out (Aqp4-/-) SD rats (300-350g) were divided into Sham group, AD group, Aqp4-/--Sham group and Aqp4-/--AD group. Sham group and Aqp4-/--Sham group were injected with saline by intraperitoneal each day for 6 weeks, and the AD group and Aqp4-/--AD group were injected with D-galactose by intraperitoneal each day for 6 weeks. MRI tracer Gd-DTPA (10 mmol/L, 2 μL) was injected into the hippocampus of the rats. MRI scan was performed at the end of 0.5 h, 1.5 h, 1 h, 2 h, and 3 h to observe the dynamic distribution of the Gd-DTPA in the hippocampus and the diffusion rate D*, clearance rate k' and half-life t1/2 measured. RESULTS The diffusion rate D* in Sham group was (2.66±0.36)×10-6 mm2/s, the diffusion rate D* in AD group was (2.72±0.62)×10-6 mm2/s, the diffusion rate D* in Aqp4-/--Sham group was (2.75±0.47)×10-6 mm2/s, the diffusion rate D* in Aqp4-/--AD group was (2.802±0.55)×10-6 mm2/s, and there was no statistically significant difference in the four groups (One-Way ANOVA, P>0.05).The clearance rate k' in Sham group was (4.57±0.14)×10-4/s, the clearance rate k' in AD group was (3.68±0.22)×10-4/s, the clearance rate k' in Aqp4-/--Sham group was (3.17±0.16)×10-4/s, the clearance rate k' in Aqp4-/--AD group was (2.59±0.19)×10-4/s, and there was significant difference in the four groups (One-Way ANOVA, P<0.05). The half-life t1/2 in Sham group was (0.67±0.12) h, the half-life t1/2 in AD group was (0.88±0.08) h, the half-life t1/2 in Aqp4-/--Sham group was (1.12±0.15) h, the half-life t1/2 in Aqp4-/--AD group was (1.58±0.11) h, and there was significance difference in the four groups(one-way ANOVA,P<0.05). CONCLUSION The ISF drainage is slow after AD and the loss of Aqp4 in the AD makes the ISF drainage obviously slow down, Aqp4 plays an important role in AD to remove the metabolism of waste out of the brain.
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Affiliation(s)
- E Liu
- Department of Anatomy and Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Y X Zhang
- Department of Anatomy and Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - L L Sun
- Department of Anatomy and Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Z Teng
- Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
| | - A B Wang
- Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
| | - H B Han
- Beijing Key Lab of Magnetic Resonance Imaging Device and Technique, Beijing 100191, China
| | - J H Yan
- Department of Anatomy and Embryology, School of Basic Medical Sciences, Peking University, Beijing 100191, China
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Jiang Y, Peng W, Tian B, Zhu C, Chen L, Wang X, Liu Q, Wang Y, Xiang Z, Degnan AJ, Teng Z, Saloner D, Lu J. Identification and Quantitative Assessment of Different Components of Intracranial Atherosclerotic Plaque by Ex Vivo 3T High-Resolution Multicontrast MRI. AJNR Am J Neuroradiol 2017; 38:1716-1722. [PMID: 28684455 DOI: 10.3174/ajnr.a5266] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 04/23/2017] [Indexed: 01/30/2023]
Abstract
BACKGROUND AND PURPOSE High-resolution 3T MR imaging can visualize intracranial atherosclerotic plaque. However, histologic validation is still lacking. This study aimed to evaluate the ability of 3T MR imaging to identify and quantitatively assess intracranial atherosclerotic plaque components ex vivo with histologic validation. MATERIALS AND METHODS Fifty-three intracranial arterial specimens with atherosclerotic plaques from 20 cadavers were imaged by 3T MR imaging with T1, T2, and proton-density-weighted FSE and STIR sequences. The signal characteristics and areas of fibrous cap, lipid core, calcification, fibrous tissue, and healthy vessel wall were recorded on MR images and compared with histology. Fibrous cap thickness and maximum wall thickness were also quantified. The percentage of areas of the main plaque components, the ratio of fibrous cap thickness to maximum wall thickness, and plaque burden were calculated and compared. RESULTS The signal intensity of the lipid core was significantly lower than that of the fibrous cap on T2-weighted, proton-density, and STIR sequences (P < .01) and was comparable on T1-weighted sequences (P = 1.00). Optimal contrast between the lipid core and fibrous cap was found on T2-weighted images. Plaque component mean percentages were comparable between MR imaging and histology: fibrous component (81.86% ± 10.59% versus 81.87% ± 11.59%, P = .999), lipid core (19.51% ± 10.76% versus 19.86% ± 11.56%, P = .863), and fibrous cap (31.10% ± 11.28% versus 30.83% ± 8.51%, P = .463). However, MR imaging overestimated mean calcification (9.68% ± 5.21% versus 8.83% ± 5.67%, P = .030) and plaque burden (65.18% ± 9.01% versus 52.71% ± 14.58%, P < .001). CONCLUSIONS Ex vivo 3T MR imaging can accurately identify and quantitatively assess intracranial atherosclerotic plaque components, providing a direct reference for in vivo intracranial plaque imaging.
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Affiliation(s)
- Y Jiang
- From the Department of Radiology (Y.J.), Wuhan General Hospital of the People's Liberation Army, Wuhan, China.,Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - W Peng
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - B Tian
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - C Zhu
- Department of Radiology and Biomedical Imaging (C.Z., D.S.), University of California, San Francisco, San Francisco, California
| | - L Chen
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - X Wang
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - Q Liu
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
| | - Y Wang
- Pathology (Y.W., Z.X.), Changhai Hospital, Shanghai, China
| | - Z Xiang
- Pathology (Y.W., Z.X.), Changhai Hospital, Shanghai, China
| | - A J Degnan
- Department of Radiology (A.J.D.), University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Z Teng
- Department of Radiology (Z.T.), University of Cambridge, Cambridge, UK
| | - D Saloner
- Department of Radiology and Biomedical Imaging (C.Z., D.S.), University of California, San Francisco, San Francisco, California
| | - J Lu
- Departments of Radiology (Y.J., W.P., B.T., L.C., X.W., Q.L., J.L.)
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Teng Z, Douglas G, Brown A, Sutcliffe M, Gillard J. Impact of fibre orientation in fibrous cap on the mechanical loading in human coronary atherosclerotic plaques. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Liu Y, Wang Y, Teng Z, Chen J, Li Y, Chen Z, Li Z, Zhang Z. Matrix metalloproteinase 9 expression and survival of patients with osteosarcoma: a meta-analysis. Eur J Cancer Care (Engl) 2015; 26. [PMID: 26239566 DOI: 10.1111/ecc.12364] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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: 06/29/2015] [Indexed: 11/28/2022]
Abstract
Several studies have evaluated the effect of matrix metalloproteinase-9 (MMP-9) expression on the overall survival of patients with osteosarcoma, but the results remain conflicting. To examine the prognostic significance of MMP-9 expression in osteosarcoma risk, we conducted this meta-analysis to systematically review the published studies. We searched the commonly used electronic databases updated to September 2013 for relevant studies which evaluated the correction between MMP-9 expression and survival of patients with osteosarcoma. Overall, a total of eight studies including 437 cases were screened out. No significant heterogeneity was observed between studies. The MMP-9 was expressed in 73.9% (323/437) of cases, and the results showed that MMP-9 expression was associated with increased mortality rate of osteosarcoma during the follow-up (risk ratio = 2.79, 95% confidence interval, CI = 1.96-3.97, P < 0.00001). By ethnicity analysis, a significant correction was also found between MMP-9 expression and osteosarcoma risk among Asian and non-Asian population (P < 0.001), indicating that MMP-9 was an indicator of prognosis of osteosarcoma. In conclusion, this meta-analysis indicated that MMP-9 expression might be a biomarker of poor prognosis for patients with osteosarcoma. However, the prognostic value of MMP-9 on survival of osteosarcoma patients still needs further large-scale trials to be clarified.
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Affiliation(s)
- Y Liu
- Department of Orthopedic Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei
| | - Y Wang
- Department of Pharmacology, Medical College of Hebei University of Engineering, Handan, Hebei
| | - Z Teng
- Department of Orthopedic Surgery, People's Hospital of Yuxi City, Yuxi, Yunnan
| | - J Chen
- Department of Orthopedic Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei
| | - Y Li
- Department of Orthopedic Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei
| | - Z Chen
- Department of Orthopedic Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei
| | - Z Li
- Department of Orthopedic Surgery, Affiliated Hospital of Hebei University of Engineering, Handan, Hebei
| | - Z Zhang
- Department of Orthopedic Surgery, General Hospital of Jizhong Energy Fengfeng Group, Handan, Hebei, China
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Teng Z, Sutcliffe M, Lu Q, Gillard J. The extensibility and ultimate material strength of atherosclerotic component in human carotid plaques. Atherosclerosis 2015. [DOI: 10.1016/j.atherosclerosis.2015.04.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Zhao B, Qin S, Teng Z, Chen J, Yu X, Gao Y, Shen J, Cui X, Zeng M, Zhang X. Epidemiological study of influenza B in Shanghai during the 2009-2014 seasons: implications for influenza vaccination strategy. Clin Microbiol Infect 2015; 21:694-700. [PMID: 25882368 DOI: 10.1016/j.cmi.2015.03.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 02/13/2015] [Accepted: 03/21/2015] [Indexed: 11/29/2022]
Abstract
A new quadrivalent influenza vaccine has been available for influenza B, which can pose a significant global health burden. Shanghai has the highest GDP and largest metropolitan population in China. To understand the impact of influenza B in Shanghai in terms of age-related incidence and relative prevalence compared with other subtypes, we conducted this retrospective epidemiological study of influenza B in the 2009-2014 seasons. A total of 71 354 outpatients with influenza-like illness were included, and both lineages of influenza B and subtypes of influenza A were identified using real-time RT-PCR. The antigenic characteristics of influenza B isolates were analysed by sequencing and reciprocal haemagglutinin inhibition assay. On average, 33.45% of influenza strains were influenza B, and 40.20% of strains isolated from children were influenza B. The incidence of influenza B was highest (12.52 per 100 people with influenza-like illness) in children ages 6-17 years and usually peaked in this age group at the early stage of an influenza B epidemic. Overall, both matched and mismatched influenza B strains co-circulated in Shanghai annually, and 44.57% of the circulating influenza B belonged to the opposite lineage of the vaccine strains. We concluded that influenza B has caused a substantial impact in Shanghai and that school-aged children play a key role in the transmission of influenza B. Hence, it may be beneficial to prioritize influenza vaccination for school-aged children to mitigate the outbreaks of influenza B.
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Affiliation(s)
- B Zhao
- Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China; Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - S Qin
- Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Z Teng
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - J Chen
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - X Yu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - Y Gao
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - J Shen
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - X Cui
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - M Zeng
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, China.
| | - X Zhang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China.
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Makris GC, Teng Z, Patterson AJ, Lin JM, Young V, Graves MJ, Gillard JH. Advances in MRI for the evaluation of carotid atherosclerosis. Br J Radiol 2015; 88:20140282. [PMID: 25826233 DOI: 10.1259/bjr.20140282] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Carotid artery atherosclerosis is an important source of mortality and morbidity in the Western world with significant socioeconomic implications. The quest for the early identification of the vulnerable carotid plaque is already in its third decade and traditional measures, such as the sonographic degree of stenosis, are not selective enough to distinguish those who would really benefit from a carotid endarterectomy. MRI of the carotid plaque enables the visualization of plaque composition and specific plaque components that have been linked to a higher risk of subsequent embolic events. Blood suppressed T1 and T2 weighted and proton density-weighted fast spin echo, gradient echo and time-of-flight sequences are typically used to quantify plaque components such as lipid-rich necrotic core, intraplaque haemorrhage, calcification and surface defects including erosion, disruption and ulceration. The purpose of this article is to review the most important recent advances in MRI technology to enable better diagnostic carotid imaging.
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Affiliation(s)
- G C Makris
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - Z Teng
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - A J Patterson
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - J-M Lin
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - V Young
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - M J Graves
- Department of Radiology, University of Cambridge, Cambridge, UK
| | - J H Gillard
- Department of Radiology, University of Cambridge, Cambridge, UK
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Hu J, Zhu Y, Zhao B, Li J, Liu L, Gu K, Zhang W, Su H, Teng Z, Tang S, Yuan Z, Feng Z, Wu F. Limited human-to-human transmission of avian influenza A(H7N9) virus, Shanghai, China, March to April 2013. Euro Surveill 2014; 19. [DOI: 10.2807/1560-7917.es2014.19.25.20838] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In April 2013, two members of one family were successively confirmed as cases of avian influenza A(H7N9) virus infection in Shanghai, China. Respiratory specimens from the two cases and their close contacts were tested using real-time reverse-transcription (RT)-PCR. Paired serum specimens from contacts were tested by haemagglutination inhibition assay and microneutralisation test. The index patient developed severe pneumonia. Her husband presented with pneumonia shortly thereafter. Both cases had highly similar clinical features and infection with A(H7N9) virus was confirmed in both cases by genetic analysis. Phylogenetic analysis revealed a high level of similarity between the sequences from the two patients and environmental samples collected from wet markets in Minhang and Changning districts. Six samples from the Changning wet market were confirmed as A(H7N9) positive. Of 27 close contacts, one developed mild respiratory symptoms and another tested positive for A(H7N9) antibodies, but both were negative by real-time RT-PCR. The other 25 close contacts of both cases were A(H7N9) negative. Limited human-to-human transmission of the virus most likely occurred in the family cluster. However, other close contacts did not test positive for the virus, suggesting limited potential for extensive human-to-human transmission of the virus.
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Affiliation(s)
- J Hu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
- These authors contributed equally to this article
| | - Y Zhu
- These authors contributed equally to this article
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - B Zhao
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
- These authors contributed equally to this article
| | - J Li
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - L Liu
- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - K Gu
- Jin-an District Center for Disease Control and Prevention, Shanghai, China
| | - W Zhang
- Huashan Hospital, Fudan University, Shanghai, China
| | - H Su
- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Z Teng
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - S Tang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - Z Yuan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - Z Feng
- Public Health Emergency Center, Chinese Center for Disease Control and Prevention (China CDC), Beijing, China
| | - F Wu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
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Teng Z, Guo M, Liu X, Dai Q, Wang C, Xuan P. Measuring gene functional similarity based on group-wise comparison of GO terms. Bioinformatics 2013; 29:1424-32. [PMID: 23572412 DOI: 10.1093/bioinformatics/btt160] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Teng Z, Sadat U, Huang Y, Young V, Graves M, Lu J, Gillard J. In vivo MRI-based 3D Mechanical Stress–Strain Profiles of Carotid Plaques with Juxtaluminal Plaque Haemorrhage: An Exploratory Study for the Mechanism of Subsequent Cerebrovascular Events. Eur J Vasc Endovasc Surg 2011; 42:427-33. [DOI: 10.1016/j.ejvs.2011.05.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Accepted: 05/09/2011] [Indexed: 11/30/2022]
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Degnan AJ, Gallagher G, Teng Z, Lu J, Liu Q, Gillard JH. MR angiography and imaging for the evaluation of middle cerebral artery atherosclerotic disease. AJNR Am J Neuroradiol 2011; 33:1427-35. [PMID: 21940802 DOI: 10.3174/ajnr.a2697] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Intracranial atherosclerotic disease may constitute the most common cause of ischemic stroke worldwide; yet, in the developed world, imaging research has largely focused on extracranial atherosclerosis. Many studies in populations of Asian, African, and Hispanic descent demonstrate the preponderance of intracranial stenosis compared with carotid stenosis. This review examines the clinical presentations of MCA atherosclerosis and stenosis and the use of noninvasive MR imaging in the assessment of intracranial vasculature. MRA is a well-validated technique that offers great advantage over traditional angiography. Advances in high-resolution MR imaging of MCA stenosis have the potential to yield excellent visualization of plaque. Future developments in high-resolution MR imaging to depict intracranial atherosclerosis are explored in this review; these advances will guide endovascular therapy and the comparison of novel interventions.
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Affiliation(s)
- A J Degnan
- University Department of Radiology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
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Sadat U, Teng Z, Young VE, Walsh SR, Li ZY, Graves MJ, Varty K, Gillard JH. Association between biomechanical structural stresses of atherosclerotic carotid plaques and subsequent ischaemic cerebrovascular events--a longitudinal in vivo magnetic resonance imaging-based finite element study. Eur J Vasc Endovasc Surg 2010; 40:485-91. [PMID: 20724181 DOI: 10.1016/j.ejvs.2010.07.015] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Accepted: 07/19/2010] [Indexed: 11/16/2022]
Abstract
BACKGROUND High-resolution magnetic resonance (MR) imaging has been used for MR imaging-based structural stress analysis of atherosclerotic plaques. The biomechanical stress profile of stable plaques has been observed to differ from that of unstable plaques; however, the role that structural stresses play in determining plaque vulnerability remains speculative. METHODS A total of 61 patients with previous history of symptomatic carotid artery disease underwent carotid plaque MR imaging. Plaque components of the index artery such as fibrous tissue, lipid content and plaque haemorrhage (PH) were delineated and used for finite element analysis-based maximum structural stress (M-C Stress) quantification. These patients were followed up for 2 years. The clinical end point was occurrence of an ischaemic cerebrovascular event. The association of the time to the clinical end point with plaque morphology and M-C Stress was analysed. RESULTS During a median follow-up duration of 514 days, 20% of patients (n = 12) experienced an ischaemic event in the territory of the index carotid artery. Cox regression analysis indicated that M-C Stress (hazard ratio (HR): 12.98 (95% confidence interval (CI): 1.32-26.67, p = 0.02), fibrous cap (FC) disruption (HR: 7.39 (95% CI: 1.61-33.82), p = 0.009) and PH (HR: 5.85 (95% CI: 1.27-26.77), p = 0.02) are associated with the development of subsequent cerebrovascular events. Plaques associated with future events had higher M-C Stress than those which had remained asymptomatic (median (interquartile range, IQR): 330 kPa (229-494) vs. 254 kPa (166-290), p = 0.04). CONCLUSIONS High biomechanical structural stresses, in addition to FC rupture and PH, are associated with subsequent cerebrovascular events.
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Affiliation(s)
- U Sadat
- University Department of Radiology, University of Cambridge, Cambridge, UK.
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Sadat U, Mohsen L, Young V, Teng Z, Gillard J. MS556 HIGH RESOLUTION MRI-BASED BIOMECHANICAL STRESS ANALYSIS OF CAROTID PLAQUES CAN PREDICT SEVERITY OF WHITE MATTER LESIONS. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)71056-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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42
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Sadat U, Teng Z, Young V, Gillard J. MS558 HIGH RESOLUTION MRI-BASED BIOMECHANICAL STRESS ANALYSIS OF CAROTID ATHEROMA: A COMPARISON OF TRANSIENT ISCHEMIC ATTACK AND STROKE PATIENT GROUPS. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)71058-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Xu Y, Liu R, Zhang Z, Hao Q, Qi S, Li J, Teng Z. Variables which might predict the response to salvage radiotherapy in chinese patients with biochemical failure after radical prostatectomy. Urol Int 2006; 77:205-10. [PMID: 17033206 DOI: 10.1159/000094810] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2005] [Accepted: 03/15/2006] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIMS To evaluate the relationship between the variables and the outcomes of salvage radiotherapy (sRT) to find some predictors of sRT. METHODS The medical records of 56 patients receiving sRT for biochemical failure after radical prostatectomy (RP) were available for retrospective review. sRT was defined as external beam radiotherapy for patients with a continuous increase in the prostate-specific antigen (PSA) level of >or=0.2 ng/ml after RP. Response was defined as achievement of a PSA nadir of <or=0.1 ng/ml. RESULTS The mean follow-up period after sRT was 31.6 months. The predictors of response to sRT were PSA doubling time (PSADT) and seminal vesicle invasion. The median PSADT in responders was 6.5 months versus 4.0 months in non-responders (OR=1.66, p=0.006). The patients with a PSADT of >6 months were all responders. The response rate in patients with seminal vesicle invasion was 42.9% (6/14) versus 76.2% (32/42) in patients without seminal vesicle invasion (OR=0.119, p=0.015). CONCLUSION PSADT and the state of seminal vesicle invasion were good predictors of response to sRT. sRT was especially effective when the PSADT was >6 months and in patients without seminal vesicle invasion.
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Affiliation(s)
- Y Xu
- Department of Urology, Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin, China
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Jiang Z, Li H, Liu B, Teng Z, Qing K. [Biomechanical properties of arteries in experimental hypotensive rats]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2001; 18:381-4. [PMID: 11605494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
To study the changes of biomechanical properties after arterial remodeling in hypotension, a model of hypotension was established in rats by constricting the abdominal aorta below the orifice of the left renal artery. The change of opening angles of the abdominal aorta, femoral artery and anterior tibial artery, and the compliance of the abdominal aorta were studied. The relationship between the pressure and volume of the abdominal aorta were also observed in vivo. The results show that non-uniformal remodeling of the hypotensive artery induces the reduction of opening angles in the zero-stress state, the C/E rate of the abdominal artery decreases while the compliance increases.
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Affiliation(s)
- Z Jiang
- Institute of Biomedical Engineering, Second Military Medical University, Shanghai 200433
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Ruan Y, Liu W, Xu X, Weng SQ, Shao SK, Zhou WQ, Teng Z, Gu HX, Zhu ZY, Xu ZY. [Comparative study on antibody levels of vaccination group and control group after 4 years of immunized with type B inactivated vaccine against hemorrhagic fever with renal syndrome]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 2001; 15:274-6. [PMID: 11986705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
OBJECTIVE To compare the antibody level of vaccine group and control group in a randomized, controlled trial of type B inactivated vaccine against hemorrhagic fever with renal syndrome(HFRS) in Jiande County of Zhejiang Province and to find out if there is enhancement of subclinical infection about type B inactivated vaccine against HFRS. METHODS The number of sera collected (July 1994-July 1998) in vaccine group immunized type B inactivated vaccine against HFRS and control group were 305 and 283 persons in Jiande County respectively, and indirect immunofluorescent antibody method(IFAT) was used for testing the titer of HFRS IgG in sera. The cut-off values were determined on IFA titer of the second sera in control group with positive and negative IFA before vaccine was given respectively, and the subclinical infection of positive and negative IFA of the first sera in vaccine group was evaluated. RESULTS When taking different cut-off values of subclinical infection, there were no statistical differences in HFRS IFA positive rates between vaccine group and control group of positive IFA in the first sera. In vaccine group and control group of negative IFA before vaccine given, also the IFA positive rates were not statistically different in these groups. There were no statistical differences of IFA GMT and IFA sero-negative rate between vaccine group and control group. CONCLUSIONS The investigation showed there was no statistical difference in antibody level between vaccine group and control group, so there could not be enhancement of subclinical infection of vaccine group receiving type B inactivated vaccine against HFRS.
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Affiliation(s)
- Y Ruan
- Center of EPI, Chinese Academy of Preventive Medicine, Beijing 100050, China
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Abstract
In this paper, single-species nonautonomous dispersal models with delays are considered. An interesting result on the effect of dispersal for persistence and extinction is obtained. That is, if the species is persistent in a patch then it is also persistent in all other patches; if the species is permanent in a patch then it is also permanent in all other patches; if the species is extinct in a patch then it is also extinct in all other patches. Furthermore, some new sufficient conditions for the permanence and extinction of the species in a patch are established. The existence of positive periodic solutions is obtained in the periodic case by employing Teng and Chen's results on the existence of positive periodic solutions for functional differential equations.
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Affiliation(s)
- Z Teng
- Department of Mathematics, Xinjiang University, Urumqi, PR China.
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Shen Z, Cen S, Shen J, Cai W, Xu J, Teng Z, Hu Z, Zeng Y. Study of immortalization and malignant transformation of human embryonic esophageal epithelial cells induced by HPV18 E6E7. J Cancer Res Clin Oncol 2000; 126:589-94. [PMID: 11043396 DOI: 10.1007/pl00008469] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [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: 12/12/2022]
Abstract
In order to study the effect of viruses and tumor promoters on the tumorigenicity of the esophagus, human embryonic esophageal epithelial cells were infected with human papilloma virus HPV18 E6E7-AAV in synergy with 12-O-tetradecanoylphorbol 13-acetate (TPA) to observe their malignant transformation. The cultured esophageal epithelial cells incubated with HPV18 E6E7-AAV were divided into two groups: the SHEEC1 group was exposed to TPA (5 ng/ml) for 4 weeks at the 5th passage of the cells; the SHEE group served as the control and was cultured in the same medium without TPA. The morphological phenotype, the DNA content during the cell cycle and the chromosomes were analyzed. The tumorigenicity was assessed by colony formation after cultivation in soft agar and transplanting the cells into nude mice. HPV18 E6E7 DNA was assayed by fluorescent in situ hybridization (FISH) and the polymerase chain reaction (PCR). The SHEE group, at its 20th passage, grew as a monolayer with the cells showing anchorage dependence and contact inhibition. The chromosome analysis showed diploidy, and soft-agar cultivation and injection into nude mice showed the cells to be non-tumorigenic. They were therefore immortalized cells. In contrast, the SHEEC1 group (TPA group) showed increased DNA synthesis and a proliferative index that was higher (45%) than that of the SHEE group (34%). The number of large colonies of dense multilayer cells (positively transformed foci) in soft agar was high in SHEEC1 group (4.0%) but low in the SHEE group (0.1%). Tumors resulting from transplantation were observed in all six nude mice injected subcutaneously with cells of the SHEEC1 group but no tumor developed in mice receiving cells of the SHEE group. In both groups of cells, HPV18 E6E7 DNA was positively detected by FISH and PCR. The malignant transformation of human embryonic epithelial cells was induced in vitro by HPV18 E6E7 in synergy with TPA. This is a good evidence for the close relationship between HPV and the etiology and pathogenicity of esophageal carcinoma. It is also a reliable model for studying the cellular and molecular mechanisms of carcinogenesis of esophageal carcinoma.
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Affiliation(s)
- Z Shen
- Department of Tumor Pathology, Medical College Shantou University, Guandong, PR China
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Teng Z, Li D, Gao L. [Expression of recombinant HIV-1 envelope glycoprotein gp41]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 1999; 13:113-6. [PMID: 12569773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To construct and express HIV-1 env gp41 gene for develoing a simple and rapid test for HIV-1 infection. METHODS HIV-1 env gp41 gene of BH10 strain (nt6,977-7,497) was constructed into expressing vector pBV221 and expressed in E. Coli HB101. The expressed proteins were purified on 15% SDS-PAGE, the specific protein gel was cut down, transferred onto nitrocellulose membrane and stained with ponceau for 10 minutes. The membrane was detected with positive and negative serum respectively. The membrane was blocked with blocking buffer and cut into 2 mm of each strip and fixed into the well of thin plastic plate. RESULTS We obtained a strand plasmid expressing HIV-1 env gene and the protein. CONCLUSION The results showed that: (1) HIV-1 env gp41 protein can be used to detect HIV-1 antibody in serum of individual; (2) The expressed protein is a nonfusion protein and has high specificity and sensitivity to HIV-1.
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Affiliation(s)
- Z Teng
- Institute of Virology, Chinese Academy of Preventive Medicine, Beijing 100050
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