51
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Alaji Z, Safaei E, Yi H, Cong H, Wojtczak A, Lei A. Redox active ligand and metal cooperation for C(sp 2)-H oxidation: extension of the galactose oxidase mechanism in water-mediated amide formation. Dalton Trans 2018; 47:15293-15297. [PMID: 30325380 DOI: 10.1039/c8dt03477j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Redox interplay between a ligand and a metal can provide a profound driving force for the promotion of unprecedented reactions. This work presents an intriguing water-assisted oxidative transformation of imine to amide with no formal change in the metal oxidation state in the copper and nickel complexes of an aminophenol ligand versus a zinc analogue.
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Affiliation(s)
- Zahra Alaji
- Institute for Advanced Studies in Basic Sciences (IASBS), 45137-66731, Zanjan, Iran
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52
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Affiliation(s)
- Huamin Wang
- Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Yongli Li
- Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Zilu Tang
- Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Shengchun Wang
- Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Heng Zhang
- Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Hengjiang Cong
- Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Aiwen Lei
- Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
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53
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Han Z, Guan YQ, Liu G, Wang R, Yin X, Zhao Q, Cong H, Dong XQ, Zhang X. Iridium-Catalyzed Asymmetric Hydrogenation of Tetrasubstituted α-Fluoro-β-enamino Esters: Efficient Access to Chiral α-Fluoro-β-amino Esters with Two Adjacent Tertiary Stereocenters. Org Lett 2018; 20:6349-6353. [DOI: 10.1021/acs.orglett.8b02503] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhengyu Han
- Key Laboratory of Biomedical Polymers, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Yu-Qing Guan
- Key Laboratory of Biomedical Polymers, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Gang Liu
- Key Laboratory of Biomedical Polymers, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Rui Wang
- Key Laboratory of Biomedical Polymers, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Xuguang Yin
- Key Laboratory of Biomedical Polymers, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Qingyang Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule, Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an, People’s Republic of China
| | - Hengjiang Cong
- Key Laboratory of Biomedical Polymers, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Xiu-Qin Dong
- Key Laboratory of Biomedical Polymers, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
| | - Xumu Zhang
- Key Laboratory of Biomedical Polymers, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, Guangdong 518000, People’s Republic of China
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54
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Tian H, Yuan L, Zhou D, Niu J, Cong H, Xiang A. Improved mechanical properties of poly (vinyl alcohol) films with glycerol plasticizer by uniaxial drawing. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4374] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Huafeng Tian
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, School of Material and Mechanical Engineering; Beijing Technology and Business University; Beijing 100048 China
- Key Laboratory of Carbohydrate and Biotechnology Ministry of Education; Jiangnan University; Lihu Road 1800 Wuxi 214122 China
| | - Li Yuan
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, School of Material and Mechanical Engineering; Beijing Technology and Business University; Beijing 100048 China
| | - Dan Zhou
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, School of Material and Mechanical Engineering; Beijing Technology and Business University; Beijing 100048 China
| | - Junyi Niu
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, School of Material and Mechanical Engineering; Beijing Technology and Business University; Beijing 100048 China
| | - Hengjiang Cong
- College of Chemistry & Molecular Sciences; Wuhan University; Wuhan 430072 China
| | - Aimin Xiang
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, School of Material and Mechanical Engineering; Beijing Technology and Business University; Beijing 100048 China
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55
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Schindelholz E, Cong H, Jove-Colon C, Li S, Ohlhausen J, Moffat H. Electrochemical aspects of copper atmospheric corrosion in the presence of sodium chloride. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.04.184] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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56
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Affiliation(s)
- Hua-Chao Liu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Liang Wei
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Rong Huang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Hai-Yan Tao
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Hengjiang Cong
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Chun-Jiang Wang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 230021, China
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57
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Zeng JY, Zou MZ, Zhang M, Wang XS, Zeng X, Cong H, Zhang XZ. π-Extended Benzoporphyrin-Based Metal-Organic Framework for Inhibition of Tumor Metastasis. ACS Nano 2018; 12:4630-4640. [PMID: 29584395 DOI: 10.1021/acsnano.8b01186] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We report on the benzoporphyrin-based metal-organic framework (TBP-MOF), with 10-connected Zr6 cluster and much improved photophysical properties over the traditional porphyrin-based MOFs. It was found that TBP-MOF exhibited red-shifted absorption bands and strong near-infrared luminescence for bioimaging, whereas the π-extended benzoporphyrin-based linkers of TBP-MOF facilitated 1O2 generation to enhance O2-dependent photodynamic therapy (PDT). It was demonstrated that poly(ethylene glycol)-modified nanoscale TBP-MOF (TBP-nMOF) can be used as an effective PDT agent under hypoxic tumor microenvironment. We also elucidated that the low O2-dependent PDT of TBP-nMOF in combination with αPD-1 checkpoint blockade therapy can not only suppress the growth of primary tumor, but also stimulate an antitumor immune response for inhibiting metastatic tumor growth. We believe this TBP-nMOF has great potential to serve as an efficient photosensitizer for PDT and cancer immunotherapy.
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Affiliation(s)
- Jin-Yue Zeng
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies (IAS), Department of Chemistry , Wuhan University , Wuhan 430072 , PR China
| | - Mei-Zhen Zou
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies (IAS), Department of Chemistry , Wuhan University , Wuhan 430072 , PR China
| | - Mingkang Zhang
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies (IAS), Department of Chemistry , Wuhan University , Wuhan 430072 , PR China
| | - Xiao-Shuang Wang
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies (IAS), Department of Chemistry , Wuhan University , Wuhan 430072 , PR China
| | - Xuan Zeng
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies (IAS), Department of Chemistry , Wuhan University , Wuhan 430072 , PR China
| | - Hengjiang Cong
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies (IAS), Department of Chemistry , Wuhan University , Wuhan 430072 , PR China
| | - Xian-Zheng Zhang
- Key Laboratory of Biomedical Polymers of Ministry of Education, Institute for Advanced Studies (IAS), Department of Chemistry , Wuhan University , Wuhan 430072 , PR China
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58
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Tang S, Wang S, Liu Y, Cong H, Lei A. Electrochemical Oxidative C-H Amination of Phenols: Access to Triarylamine Derivatives. Angew Chem Int Ed Engl 2018; 57:4737-4741. [PMID: 29498166 DOI: 10.1002/anie.201800240] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [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: 01/07/2018] [Revised: 01/11/2018] [Indexed: 01/07/2023]
Abstract
Dehydrogenative C-H/N-H cross-coupling serves as one of the most straightforward and atom-economical approaches for C-N bond formation. In this work, an electrochemical reaction protocol has been developed for the oxidative C-H amination of unprotected phenols under undivided electrolytic conditions. Neither metal catalysts nor chemical oxidants are needed to facilitate the dehydrogenation process. A series of triarylamine derivatives could be obtained with good functional-group tolerance. The electrolysis is scalable and can be performed at ambient conditions.
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Affiliation(s)
- Shan Tang
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, Hubei, P. R. China
| | - Siyuan Wang
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, Hubei, P. R. China
| | - Yichang Liu
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, Hubei, P. R. China
| | - Hengjiang Cong
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, Hubei, P. R. China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, Hubei, P. R. China.,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
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59
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Affiliation(s)
- Shan Tang
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies (IAS); Wuhan University; Wuhan 430072 Hubei P. R. China
| | - Siyuan Wang
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies (IAS); Wuhan University; Wuhan 430072 Hubei P. R. China
| | - Yichang Liu
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies (IAS); Wuhan University; Wuhan 430072 Hubei P. R. China
| | - Hengjiang Cong
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies (IAS); Wuhan University; Wuhan 430072 Hubei P. R. China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences; Institute for Advanced Studies (IAS); Wuhan University; Wuhan 430072 Hubei P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences; Lanzhou 730000 P. R. China
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60
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Liu WB, Cai J, Wei Q, Hu XD, Zhang Y, Li W, Cong H, Liu W. Enantioselective Construction of Bridgehead Quaternary Carbon Containing Bicyclo[3.3.1]nonanes by Palladium-Catalyzed Desymmetric Arylation. SYNTHESIS-STUTTGART 2018. [DOI: 10.1055/s-0036-1591751] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
An enantioselective and catalytic method for the synthesis of bridgehead quaternary carbon containing bicyclo[3.3.1]nonanes is described. The intramolecular desymmetric arylation of α-disubstituted 1,3-diketones was achieved using a chiral Pd/PHOX complex. A variety of bridged cyclic molecules, common skeleton for polyprenylated acylphloroglucinols, were obtained in up to 84% yield with 86% ee.
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61
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Sun Y, Cong H, Zan L, Zhang Y. Oxygen Vacancies and Stacking Faults Introduced by Low-Temperature Reduction Improve the Electrochemical Properties of Li 2MnO 3 Nanobelts as Lithium-Ion Battery Cathodes. ACS Appl Mater Interfaces 2017; 9:38545-38555. [PMID: 29035035 DOI: 10.1021/acsami.7b12080] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Among the Li-rich layered oxides Li2MnO3 has significant theoretical capacity as a cathode material for Li-ion batteries. Pristine Li2MnO3 generally has to be electrochemically activated in the first charge-discharge cycle which causes very low Coulombic efficiency and thus deteriorates its electrochemical properties. In this work, we show that low-temperature reduction can produce a large amount of structural defects such as oxygen vacancies, stacking faults, and orthorhombic LiMnO2 in Li2MnO3. The Rietveld refinement analysis shows that, after a reduction reaction with stearic acid at 340 °C for 8 h, pristine Li2MnO3 changes into a Li2MnO3-LiMnO2 (0.71/0.29) composite, and the monoclinic Li2MnO3 changes from Li2.04Mn0.96O3 in the pristine Li2MnO3 (P-Li2MnO3) to Li2.1Mn0.9O2.79 in the reduced Li2MnO3 (R-Li2MnO3), indicating the production of a large amount of oxygen vacancies in the R-Li2MnO3. High-resolution transmission electron microscope images show that a high density of stacking faults is also introduced by the low-temperature reduction. When measured as a cathode material for Li-ion batteries, R-Li2MnO3 shows much better electrochemical properties than P-Li2MnO3. For example, when charged-discharged galvanostatically at 20 mA·g-1 in a voltage window of 2.0-4.8 V, R-Li2MnO3 has Coulombic efficiency of 77.1% in the first charge-discharge cycle, with discharge capacities of 213.8 and 200.5 mA·h·g-1 in the 20th and 30th cycles, respectively. In contrast, under the same charge-discharge conditions, P-Li2MnO3 has Coulombic efficiency of 33.6% in the first charge-discharge cycle, with small discharge capacities of 80.5 and 69.8 mA·h·g-1 in the 20th and 30th cycles, respectively. These materials characterizations, and electrochemical measurements show that low-temperature reduction is one of the effective ways to enhance the performances of Li2MnO3 as a cathode material for Li-ion batteries.
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Affiliation(s)
- Ya Sun
- College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, People's Republic of China
| | - Hengjiang Cong
- College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, People's Republic of China
| | - Ling Zan
- College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, People's Republic of China
| | - Youxiang Zhang
- College of Chemistry and Molecular Sciences, Wuhan University , Wuhan 430072, People's Republic of China
- Shenzhen Research Institute of Wuhan University , Shenzhen 518000, People's Republic of China
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62
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Guo N, Zhang N, Yan L, Cao X, Lv F, Wang J, Wang Y, Cong H. Down-regulation of single-stranded DNA-binding protein 1 expression induced by HCMV infection promotes lipid accumulation in cells. ACTA ACUST UNITED AC 2017; 50:e6389. [PMID: 28902926 PMCID: PMC5597284 DOI: 10.1590/1414-431x20176389] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 06/22/2017] [Indexed: 01/07/2023]
Abstract
The objective of this study was to observe the infection of human cytomegalovirus (HCMV) to human umbilical vein endothelial cells, and its effect on the expression of single-stranded DNA-binding protein (SSBP1) and on lipid metabolism in endothelial cells. We screened the differential expression of mRNAs after HCMV infection by suppression subtractive hybridization and the expression levels of SSBP1 mRNA and protein after HCMV infection by real-time PCR and western blot. After verification of successful infection by indirect immunofluorescent staining and RT-PCR, we found a differential expression of lipid metabolism-related genes including LDLR, SCARB, CETP, HMGCR, ApoB and LPL induced by HCMV infection. The expression levels of SSBP1 mRNA and protein after HCMV infection were significantly down-regulated. Furthermore, we found that upregulation of SSBP1 inhibited the expression of atherosclerosis-associated LDLR, SCARB, HMGCR, CETP as well as the accumulation of lipids in the cells. The results showed that the inhibition of SSBP1 by HCMV infection promotes lipid accumulation in the cells.
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Affiliation(s)
- N Guo
- Department of Cardiology, Tianjin Chest Hospital, Tianjin Medical University, Tianjin, China.,Department of Cardiology, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China
| | - N Zhang
- Department of Cardiology, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China
| | - L Yan
- Department of Cardiology, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China
| | - X Cao
- Department of Cardiology, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China
| | - F Lv
- Department of Cardiology, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China
| | - J Wang
- Department of Cardiology, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China
| | - Y Wang
- Department of Cardiology, Cangzhou Central Hospital, Hebei Medical University, Cangzhou, China
| | - H Cong
- Department of Cardiology, Tianjin Chest Hospital, Tianjin Medical University, Tianjin, China
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63
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Yang J, Zhang YB, Liu Q, Trickett CA, Gutiérrez-Puebla E, Monge MÁ, Cong H, Aldossary A, Deng H, Yaghi OM. Principles of Designing Extra-Large Pore Openings and Cages in Zeolitic Imidazolate Frameworks. J Am Chem Soc 2017; 139:6448-6455. [DOI: 10.1021/jacs.7b02272] [Citation(s) in RCA: 159] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jingjing Yang
- Department
of Chemistry, University of California, Berkeley, Materials Sciences Division,
Lawrence Berkeley National Laboratory, and Kavli Energy NanoSciences
Institute, Berkeley, California 94720, United States
| | - Yue-Biao Zhang
- Department
of Chemistry, University of California, Berkeley, Materials Sciences Division,
Lawrence Berkeley National Laboratory, and Kavli Energy NanoSciences
Institute, Berkeley, California 94720, United States
| | - Qi Liu
- Key
Laboratory of Biomedical Polymers—Ministry of Education, College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
- UC
Berkeley, Global Science Institute - Wuhan University, the Insitute
of Advanced Studies Joint Innovative Center, Wuhan University, Wuhan 430072, China
| | - Christopher A. Trickett
- Department
of Chemistry, University of California, Berkeley, Materials Sciences Division,
Lawrence Berkeley National Laboratory, and Kavli Energy NanoSciences
Institute, Berkeley, California 94720, United States
| | - Enrique Gutiérrez-Puebla
- Instituto de Ciencia de Materiales de Madrid-CSIC, Sor Juana Inés de la Cruz 3, 20849 Madrid, Spain
| | - M. Ángeles Monge
- Instituto de Ciencia de Materiales de Madrid-CSIC, Sor Juana Inés de la Cruz 3, 20849 Madrid, Spain
| | - Hengjiang Cong
- Key
Laboratory of Biomedical Polymers—Ministry of Education, College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Abdulrahman Aldossary
- Department
of Chemistry, University of California, Berkeley, Materials Sciences Division,
Lawrence Berkeley National Laboratory, and Kavli Energy NanoSciences
Institute, Berkeley, California 94720, United States
| | - Hexiang Deng
- Key
Laboratory of Biomedical Polymers—Ministry of Education, College
of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
- UC
Berkeley, Global Science Institute - Wuhan University, the Insitute
of Advanced Studies Joint Innovative Center, Wuhan University, Wuhan 430072, China
| | - Omar M. Yaghi
- Department
of Chemistry, University of California, Berkeley, Materials Sciences Division,
Lawrence Berkeley National Laboratory, and Kavli Energy NanoSciences
Institute, Berkeley, California 94720, United States
- UC
Berkeley, Global Science Institute - Wuhan University, the Insitute
of Advanced Studies Joint Innovative Center, Wuhan University, Wuhan 430072, China
- King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
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64
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Luo Q, Dai Z, Cong H, Li R, Peng T, Zhang J. Oxidant-free synthesis of benzimidazoles from alcohols and aromatic diamines catalysed by new Ru(ii)-PNS(O) pincer complexes. Dalton Trans 2017; 46:15012-15022. [DOI: 10.1039/c7dt02584j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A greener method for synthesizing 2-substituted benzimidazole through the acceptorless dehydrogenative condensation of alcohols and ortho-arylenediamine is developed.
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Affiliation(s)
- Qi Luo
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Zengjin Dai
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Hengjiang Cong
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Renjie Li
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Tianyou Peng
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Jing Zhang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
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65
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Dai Z, Luo Q, Cong H, Zhang J, Peng T. New Ru(ii) N′NN′-type pincer complexes: synthesis, characterization and the catalytic hydrogenation of CO2 or bicarbonates to formate salts. NEW J CHEM 2017. [DOI: 10.1039/c6nj03855g] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A new homogeneous system based on new Ru(ii)-N′NN′ pincer complexes has been successfully applied to the hydrogenation of CO2 to the formate, and complex 4 exhibits the best catalytic efficiency.
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Affiliation(s)
- Zengjin Dai
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Qi Luo
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Hengjiang Cong
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Jing Zhang
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Tianyou Peng
- College of Chemistry and Molecular Science
- Wuhan University
- Wuhan 430072
- P. R. China
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66
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Lu G, Wang L, Zhou AH, Han YL, Zhou J, Guo JJ, Song PX, Zhou HY, Cong H, Hou M, He SY. Structural and antigenic analysis and cloning of surface antigen protein 5 in Toxoplasma gondii. Trop Biomed 2016; 33:675-688. [PMID: 33579064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Toxoplasma gondii is identified as an obligate intracellular apicomplexan parasite that infects warm blooded animals and humans worldwide. SAG5 protein includes SAG5A, -5B, -5C, -5D, and -5E five subtypes. SAG5A, -5B, -5C, and -5D are expressed on the surface of Toxoplasma gondii. In this study, we used online T-Coffee tool to analyze SAG5 proteins sequence alignment. SMART software was used to predict secondary structures of SAG5A, -5B, -5C, and -5D. The 3D models of SAG5 proteins were constructed and analyzed with SWISS-MODEL server and VMD software. Results indicated that SAG5A, -5B, -5C, and -5D are highly homologous proteins. Furthermore, liner-B cell epitopes and Th-cell epitopes of the four proteins were predicted using DNAMAN software and Epitope Database online service. The bioinformatics analysis of SAG5A, -5B, -5C, and -5D proteins could provide valuable information on prevention and treatment of toxoplasmosis. In addition, the four genes were obtained by PCR and inserted into an eukaryotic expression vector pEGFP-C1 respectively. Identified by restriction enzyme digestion, the four recombinant plasmids were transfected into HEK 293-T cells and tested by RT-PCR. Results showed that the constructed plasmids were all transfected to HEK 293-T cells successfully.
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Affiliation(s)
- G Lu
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong Province 250012, Peoples Republic of China
| | - L Wang
- Department of Ji Nan Children's Hospital, 250022, Jinan, Shandong Province, Peoples Republic of China
| | - A H Zhou
- Department of Pediatrics, Provincial Hospital Affiliated to Shandong University, Shandong University School of Medicine, 250021, Jinan, Shandong Province, Peoples Republic of China
| | - Y L Han
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong Province 250012, Peoples Republic of China
| | - J Zhou
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong Province 250012, Peoples Republic of China
| | - J J Guo
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong Province 250012, Peoples Republic of China
| | - P X Song
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong Province 250012, Peoples Republic of China
| | - H Y Zhou
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong Province 250012, Peoples Republic of China
| | - H Cong
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong Province 250012, Peoples Republic of China
| | - M Hou
- Department of Hematology, Qilu Hospital, Shandong University, 250012, Jinan, China
| | - S Y He
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong Province 250012, Peoples Republic of China
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67
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Wang L, Lu G, Zhou A, Han Y, Guo J, Zhou H, Cong H, He S. Evaluation of immune responses induced by rhoptry protein 5 and rhoptry protein 7 DNA vaccines against Toxoplasma gondii. Parasite Immunol 2016; 38:209-17. [PMID: 26802673 DOI: 10.1111/pim.12306] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 01/19/2016] [Indexed: 01/01/2023]
Abstract
Infection with the protozoan parasite Toxoplasma gondii is widespread, and the organism can cause congenital infections in humans. The horizontal transmission of Toxoplasma is even more common than congenital. An effective vaccine strategy brings the prospect of improving Toxoplasma disease control. Rhoptry protein 5 (ROP5) and ROP7 are potential stimulators of humoral and cellular immune responses. In this study, we constructed a multi-antigenic DNA vaccine expressing ROP5 and ROP7 of T. gondii and compared the protective efficacy to single-gene vaccines and control groups. BALB/c mice were immunized intramuscularly three times. The levels of IgG antibodies and cytokines in mice immunized with the multi-antigenic DNA vaccine (pROP5/ROP7) were significantly higher than those in the control mice. Mice vaccinated with pROP5/ROP7 showed a longer survival time (16 days) than single-gene-immunized mice (11 and 12 days, respectively) or control mice (8 days) after a challenge with 1 × 10(4) tachyzoites of RH strain of T. gondii. Furthermore, after intragastric infection with 20 cysts of PRU strain of T. gondii, the number of brain cysts in mice immunized with pROP5/ROP7 was only 25% of the number in control mice. Our results showed that a DNA vaccine encoding ROP5 and ROP7 significantly enhanced protection against T. gondii challenge.
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Affiliation(s)
- L Wang
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong, China.,Department of Ji Nan Children's Hospital, 250022, Jinan, Shandong Province, Peoples Republic of China
| | - G Lu
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong, China
| | - A Zhou
- Department of Pediatrics, Provincial Hospital Affiliated to Shandong University, Shandong University School of Medicine, Jinan, Shandong, China
| | - Y Han
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong, China
| | - J Guo
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong, China
| | - H Zhou
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong, China
| | - H Cong
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong, China
| | - S He
- Department of Parasitology, Shandong University School of Medicine, Jinan, Shandong, China
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68
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Liu Q, Cong H, Deng H. Deciphering the Spatial Arrangement of Metals and Correlation to Reactivity in Multivariate Metal–Organic Frameworks. J Am Chem Soc 2016; 138:13822-13825. [DOI: 10.1021/jacs.6b08724] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Qi Liu
- Key Laboratory of Biomedical Polymers-Ministry
of Education, College
of Chemistry and Molecular Sciences and §The Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Hengjiang Cong
- Key Laboratory of Biomedical Polymers-Ministry
of Education, College
of Chemistry and Molecular Sciences and §The Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Hexiang Deng
- Key Laboratory of Biomedical Polymers-Ministry
of Education, College
of Chemistry and Molecular Sciences and §The Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
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69
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Wang W, He T, Liu X, He W, Cong H, Shen Y, Yan L, Zhang X, Zhang J, Zhou X. Highly Active Carbon Supported Pd-Ag Nanofacets Catalysts for Hydrogen Production from HCOOH. ACS Appl Mater Interfaces 2016; 8:20839-20848. [PMID: 27454194 DOI: 10.1021/acsami.6b08091] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Hydrogen is regarded as a future sustainable and clean energy carrier. Formic acid is a safe and sustainable hydrogen storage medium with many advantages, including high hydrogen content, nontoxicity, and low cost. In this work, a series of highly active catalysts for hydrogen production from formic acid are successfully synthesized by controllably depositing Pd onto Ag nanoplates with different Ag nanofacets, such as Ag{111}, Ag{100}, and the nanofacet on hexagonal close packing Ag crystal (Ag{hcp}). Then, the Pd-Ag nanoplate catalysts are supported on Vulcan XC-72 carbon black to prevent the aggregation of the catalysts. The research reveals that the high activity is attributed to the formation of Pd-Ag alloy nanofacets, such as Pd-Ag{111}, Pd-Ag{100}, and Pd-Ag{hcp}. The activity order of these Pd-decorated Ag nanofacets is Pd-Ag{hcp} > Pd-Ag{111} > Pd-Ag{100}. Particularly, the activity of Pd-Ag{hcp} is up to an extremely high value, i.e., TOF{hcp} = 19 000 ± 1630 h(-1) at 90 °C (lower limit value), which is more than 800 times higher than our previous quasi-spherical Pd-Ag alloy nanocatalyst. The initial activity of Pd-Ag{hcp} even reaches (3.13 ± 0.19) × 10(6) h(-1) at 90 °C. This research not only presents highly active catalysts for hydrogen generation but also shows that the facet on the hcp Ag crystal can act as a potentially highly active catalyst.
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Affiliation(s)
- Wenhui Wang
- Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215125, China
- Department of Chemistry, College of Sciences, Shanghai University , 99 Shangda Road, Shanghai 200444, China
| | - Ting He
- Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215125, China
- Department of Chemistry, College of Sciences, Shanghai University , 99 Shangda Road, Shanghai 200444, China
| | - Xuehua Liu
- Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215125, China
| | - Weina He
- Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215125, China
| | - Hengjiang Cong
- College of Chemistry and Molecular Science, Wuhan University , Wuhan 430072, China
| | - Yangbin Shen
- Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215125, China
| | - Liuming Yan
- Department of Chemistry, College of Sciences, Shanghai University , 99 Shangda Road, Shanghai 200444, China
| | - Xuetong Zhang
- Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215125, China
| | - Jinping Zhang
- Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215125, China
| | - Xiaochun Zhou
- Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215125, China
- Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215125, China
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70
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He Q, Wang F, Liu S, Zhu D, Cong H, Gao F, Li B, Wang H, Lin Z, Liao J, Gu L. Structural and biochemical insight into the mechanism of Rv2837c from Mycobacterium tuberculosis as a c-di-NMP phosphodiesterase. J Biol Chem 2016; 291:14386-14387. [PMID: 27371563 DOI: 10.1074/jbc.a115.699801] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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71
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Shi Q, Li Y, Bo S, Li X, Zhao P, Liu Q, Yang Z, Cong H, Deng H, Chen M, Chen S, Zhou X, Ding H, Jiang ZX. Correction: Discovery of a (19)F MRI sensitive salinomycin derivative with high cytotoxicity towards cancer cells. Chem Commun (Camb) 2016; 52:7314. [PMID: 27189350 DOI: 10.1039/c6cc90215d] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correction for 'Discovery of a (19)F MRI sensitive salinomycin derivative with high cytotoxicity towards cancer cells' by Qiuyan Shi et al., Chem. Commun., 2016, 52, 5136-5139.
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Affiliation(s)
- Qiuyan Shi
- School of Pharmaceutical Sciences and College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430071, China.
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72
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Liu HC, Tao HY, Cong H, Wang CJ. Silver(I)-Catalyzed Atroposelective Desymmetrization of N-Arylmaleimide via 1,3-Dipolar Cycloaddition of Azomethine Ylides: Access to Octahydropyrrolo[3,4-c]pyrrole Derivatives. J Org Chem 2016; 81:3752-60. [DOI: 10.1021/acs.joc.6b00396] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hua-Chao Liu
- College
of Chemistry, Molecular Sciences, Wuhan University, Wuhan, China, 430072
| | - Hai-Yan Tao
- State
Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin, China, 300071
| | - Hengjiang Cong
- College
of Chemistry, Molecular Sciences, Wuhan University, Wuhan, China, 430072
| | - Chun-Jiang Wang
- College
of Chemistry, Molecular Sciences, Wuhan University, Wuhan, China, 430072
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73
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Cong H. Crystal structure and bonding analysis of the first dinuclear calcium(II)-proton-pump inhibitor (PPI) `butterfly molecule': a combined microcrystal synchrotron and DFT study. Acta Crystallogr C Struct Chem 2016; 72:326-36. [PMID: 27045183 DOI: 10.1107/s2053229616004216] [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: 01/09/2016] [Accepted: 03/12/2016] [Indexed: 05/29/2023]
Abstract
Proton-pump inhibitors (PPI) are prodrugs used widely to treat acid-related diseases since the late 1980s. After an extensive research effort it has become clear that the fundamental interactions between metal atoms and PPIs are of paramount importance for both drug release and long-term therapeutic safety. Unfortunately, until now, very little information has been available on this topic. In this paper, we report the crystal structure analysis of a novel calcium-PPI compound incorporating bridging and terminal deprotonated (R)-rabeprazole tricyclic ligands (L), namely bis[μ-(R)-2-({[4-(3-methoxypropoxy)-3-methylpyridin-2-yl]methyl}sulfinyl)-6,7-dihydro-3H-benzofuro[5,6-d]imidazol-1-ido]bis{dimethanol[(R)-2-({[4-(3-methoxypropoxy)-3-methylpyridin-2-yl]methyl}sulfinyl)-6,7-dihydro-3H-benzofuro[5,6-d]imidazol-1-ido]calcium(II)} methanol hexasolvate, [Ca2(C20H22N3O4S)4(CH3OH)4]·6CH3OH or [Ca2(L)4(CH3OH)4]·6CH3OH, which crystallizes from methanol in the polar C2 space group. Using low-temperature microcrystal synchrotron radiation, we demonstrate that this compound is in the form of a beautiful `butterfly molecule', consisting of a C2-symmetric dinuclear (CH3OH)2LCa(II)(μ2-L)2Ca(II)L(HOCH3)2 framework. A large amount of disorder is found within the bridging L ligand and the conformation of the fused tetrahydrofuran ring exhibits great variety. All the sulfinyl groups remain intact and the nonbonded Ca...Ca distance is significantly longer than in other calcium dimers, indicating steric hindrance in the bridging ligands. Considerable hydrogen bonding and aromatic C-H...π interactions co-operate to stabilize the whole complex, as well as to facilitate supramolecular assembly. Additional investigations into the bond nature were made using density functional theory (DFT) methods at the B3LYP/6-31G(d) level; geometry optimization, Mulliken atomic charges, MEP (molecular electrostatic potential), HOMO-LUMO (highest occupied molecular orbital-lowest unoccupied molecular orbital), TDOS (total density of states), PDOS (partial density of states), COOP (crystal orbital overlap population) and vibrational spectra were calculated/recorded and assessed carefully.
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Affiliation(s)
- Hengjiang Cong
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China
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74
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Shi Q, Li Y, Bo S, Li X, Zhao P, Liu Q, Yang Z, Cong H, Deng H, Chen M, Chen S, Zhou X, Ding H, Jiang ZX. Discovery of a (19)F MRI sensitive salinomycin derivative with high cytotoxicity towards cancer cells. Chem Commun (Camb) 2016; 52:5136-9. [PMID: 26997457 DOI: 10.1039/c6cc01508e] [Citation(s) in RCA: 34] [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] [Indexed: 01/07/2023]
Abstract
Salinomycin is a promising anti-cancer agent which selectively targets cancer stem cells. To improve its potency and selectivity, an analog library of salinomycin was generated by site-specific modification and CuAAc derivatization. Through a cytotoxicity analysis of the library, a fluorinated analog with high potency, selectivity, and (19)F MRI sensitivity was discovered as a novel theranostic agent.
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Affiliation(s)
- Qiuyan Shi
- School of Pharmaceutical Sciences and College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430071, China.
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75
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Zhu B, Liu C, Liu S, Cong H, Chen Y, Gu L, Ma LZ. Membrane association of SadC enhances its diguanylate cyclase activity to control exopolysaccharides synthesis and biofilm formation in Pseudomonas aeruginosa. Environ Microbiol 2016; 18:3440-3452. [PMID: 26940526 DOI: 10.1111/1462-2920.13263] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 02/12/2016] [Indexed: 11/30/2022]
Abstract
Cyclic diguanosine monophosphate (c-di-GMP) is one of the most important bacterial second messengers that controls many bacterial cellular functions including lifestyle switch between plankton and biofilm. Surface attachment defective (SadC) is a diguanylate cyclase (DGC) involved in the biosynthesis of c-di-GMP in Pseudomonas aeruginosa, an opportunistic pathogen that can cause diverse infections. Here we report the crystal structure of GGDEF domain from SadC and the critical role of the trans-membrane (TM) domain of SadC with regard to biofilm formation, exopolysaccharide production and motility. We showed that over-expression of SadC in P. aeruginosa PAO1 totally inhibited swimming motility and significantly enhanced the production of exopolysaccharide Psl. SadC lacking TM domains (SadC300-487 ) could not localize on cytoplasmic membrane and form cluster, lost the ability to inhibit the swimming and twitching motility, and showed the attenuated activity to promote Psl production despite that SadC300-487 was able to catalyze the synthesize of c-di-GMP in vitro and in vivo. The GGDEF domain of SadC has a typical GGDEF structure and the α-helix connected the TM domains with SadC GGDEF domain is essential for SadC to form DGC oligomers. Our data imply that membrane association of SadC promotes its DGC activity by affecting the formation of active DGC oligomers.
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Affiliation(s)
- Bin Zhu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.,University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Cuilan Liu
- State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China
| | - Shiheng Liu
- State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China
| | - Hengjiang Cong
- State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China
| | - Yihuan Chen
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Lichuan Gu
- State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China.
| | - Luyan Z Ma
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
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76
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Yu L, Wu Z, Xie G, Zhong C, Zhu Z, Cong H, Ma D, Yang C. Achieving a balance between small singlet–triplet energy splitting and high fluorescence radiative rate in a quinoxaline-based orange-red thermally activated delayed fluorescence emitter. Chem Commun (Camb) 2016; 52:11012-5. [DOI: 10.1039/c6cc05203g] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work presents a judicious design strategy for an orange/red thermally activated delayed fluorescence (TADF) emitter.
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Affiliation(s)
- Ling Yu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan
| | - Zhongbin Wu
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- University of Chinese Academy of Sciences
- Changchun 130022
- People's Republic of China
| | - Guohua Xie
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan
| | - Cheng Zhong
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan
| | - Zece Zhu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan
| | - Hengjiang Cong
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan
| | - Dongge Ma
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- University of Chinese Academy of Sciences
- Changchun 130022
- People's Republic of China
| | - Chuluo Yang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials
- Department of Chemistry
- Wuhan University
- Wuhan
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77
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He Q, Wang F, Liu S, Zhu D, Cong H, Gao F, Li B, Wang H, Lin Z, Liao J, Gu L. Structural and Biochemical Insight into the Mechanism of Rv2837c from Mycobacterium tuberculosis as a c-di-NMP Phosphodiesterase. J Biol Chem 2015; 291:3668-81. [PMID: 26668313 DOI: 10.1074/jbc.m115.699801] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Indexed: 12/18/2022] Open
Abstract
The intracellular infections of Mycobacterium tuberculosis, which is the causative agent of tuberculosis, are regulated by many cyclic dinucleotide signaling. Rv2837c from M. tuberculosis is a soluble, stand-alone DHH-DHHA1 domain phosphodiesterase that down-regulates c-di-AMP through catalytic degradation and plays an important role in M. tuberculosis infections. Here, we report the crystal structure of Rv2837c (2.0 Å), and its complex with hydrolysis intermediate 5'-pApA (2.35 Å). Our structures indicate that both DHH and DHHA1 domains are essential for c-di-AMP degradation. Further structural analysis shows that Rv2837c does not distinguish adenine from guanine, which explains why Rv2837c hydrolyzes all linear dinucleotides with almost the same efficiency. We observed that Rv2837c degraded other c-di-NMPs at a lower rate than it did on c-di-AMP. Nevertheless, our data also showed that Rv2837c significantly decreases concentrations of both c-di-AMP and c-di-GMP in vivo. Our results suggest that beside its major role in c-di-AMP degradation Rv2837c could also regulate c-di-GMP signaling pathways in bacterial cell.
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Affiliation(s)
- Qing He
- From the State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China
| | - Feng Wang
- From the State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China
| | - Shiheng Liu
- From the State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China
| | - Deyu Zhu
- From the State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China
| | - Hengjiang Cong
- From the State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China
| | - Fei Gao
- From the State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China
| | - Bingqing Li
- From the State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China
| | - Hongwei Wang
- From the State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China
| | - Zong Lin
- the Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, Zhejiang 314006, China, and
| | - Jun Liao
- the School of Life Science and Technology, ShanghaiTech University, Shanghai 200031, China
| | - Lichuan Gu
- From the State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China,
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78
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Zheng B, Jiang J, Liu H, Zhang J, Li H, Su X, Wang H, Song Z, Han Y, Lei H, Cong H, Zhang Z, Ma Y, Wang J, Xu B, Sun Y, Gao C, Zheng Y, Liu B, Huang D, Li B, Huang C, Yang T, Wan Z, Jia S, Chen D, Ge J, Huo Y. Efficacy and safety of serial atorvastatin load in Chinese patients undergoing elective percutaneous coronary intervention: results of the ISCAP (Intensive Statin Therapy for Chinese Patients with Coronary Artery Disease Undergoing Percutaneous Coronary Intervention) randomized controlled trial. Eur Heart J Suppl 2015. [DOI: 10.1093/eurheartj/suv021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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79
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Zhang Y, Cong H, Ji N, Liu J, Duan X, Li J, Cao W, Wang J, Jiang H. Effect of high bismuth deficiency on structure and oxide ion conductivity of a Bi 0.55MoO 4 single crystal. CrystEngComm 2015. [DOI: 10.1039/c5ce01765c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report, for the first time, the ionic conductivity properties of two polymorphic structures of bismuth molybdates: Bi0.55MoO4 and Bi2(MoO4)3.
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Affiliation(s)
- Yang Zhang
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan, China
- Department of Mathematics and Materials Research Institute
- Pennsylvania State University
| | - Hengjiang Cong
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan, China
| | - Nianjing Ji
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan, China
| | - Jian Liu
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan, China
| | - Xiulan Duan
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan, China
| | - Jing Li
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan, China
| | - Wenwu Cao
- Department of Mathematics and Materials Research Institute
- Pennsylvania State University
- University Park, USA
| | - Jiyang Wang
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan, China
| | - Huaidong Jiang
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan, China
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80
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Cong H, Zhang H. Visualizing Structural Modulation in Melilite Electrolytes by X-ray and Electron. Acta Crystallogr A Found Adv 2014. [DOI: 10.1107/s2053273314098258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Nowadays novel melilite-type oxides are of growing interest as promising new oxide-ion conductors with potential use in clean energy devices such as solid oxide fuel cells (SOFCs).[1] These oxides have a general formula of A2BC2O7, where A = large divalent alkali earth metals like Ca, Sr, Ba or trivalent rare earth metals like La, Nd, Gd; B and C = small cations like Mg, Si, Ga. In addition to the conventional tetragonal symmetry with space group P¯421m, these melilites also show a five-dimensional superspace symmetry P¯421m(α, α, 0)00s(¯α, α, 0)000 with modulation vectors q1=α(a*+b*) and q2=α(-a*+b*). Both displacive (cation and anion) and occupational (cation) modulations have been found.[2-3] Here a series of melilite single crystals, such as Ca2MgSi2O7, SrLaGa3O7, SrGdGa3O7, BaLaGa3O7 and CaNdGa3O7 have been successfully obtained using the optical floating zone and Czochralski method. Further investigations were made by a combination of temperature-variant X-ray diffraction and electron microscopy. The mechanism between substitutions in A- and B- sites and structural modulations in melilites is clarified, which paves the way for future crystallographic optimization of electrolyte performances via tailoring interstitial oxygen concentration and enhancing ion mobility.
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81
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Pan Z, Cong H, Yu H, Tian L, Yuan H, Cai H, Zhang H, Huang H, Wang J, Wang Q, Wei Z, Zhang Z. Growth, thermal properties and laser operation of Nd:Ca3La2(BO3)4: a new disordered laser crystal. Opt Express 2013; 21:6091-6100. [PMID: 23482177 DOI: 10.1364/oe.21.006091] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A novel disordered laser crystal Nd:Ca(3)La(2)(BO(3))(4) is characterized including its crystal growth, structure, thermal properties, inhomogeneously broadened spectra, and laser performance, which result that this crystal should be a promising gain material for the high-power ultrashort pulsed neodymium laser. The complete set of anisotropic thermal properties were systematically studied for the first time. It has been found that thermal contraction happens in the c direction and all the thermal conductivities increase with temperature, indicating a glass-like behavior. Polarized absorption and fluorescence spectra of Nd:Ca(3)La(2)(BO(3))(4) crystal were measured at 298.15 K and 77.3 K, respectively. The results show that both the absorption and the emission spectra of Nd(3+) have been inhomogeneously broadened, and thus it is very promising to be used in laser systems to produce femtosecond pulses. CW laser operations at 1.06 μm along the three crystallographic directions has been demonstrated for the first time. A maximum power of 1.08 W with an optical conversion efficiency of 10.6% and slope efficiency of 12.4% was achieved in the a-cut sample.
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Affiliation(s)
- Zhongben Pan
- State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China
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82
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Pan Z, Yu H, Cong H, Zhang H, Wang J, Wang Q, Wei Z, Zhang Z, Boughton RI. Polarized spectral properties and laser demonstration of Nd-doped Sr3Y2(BO3)4 crystal. Appl Opt 2012; 51:7144-7149. [PMID: 23089764 DOI: 10.1364/ao.51.007144] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2012] [Accepted: 09/13/2012] [Indexed: 06/01/2023]
Abstract
Detailed polarized spectral properties of a 0.685 at. % Nd(3+):Sr(3)Y(2)(BO(3))(4) crystal grown by the Czochralski method have been investigated, including the absorption cross section, the emission cross section, and the fluorescence lifetime. The anisotropy of the spectral properties in different polarized directions was discussed thoroughly. The absorption and emission spectra of Nd(3+) are found to be inhomogeneously broadened due to its internal disordered lattice. Additionally, the CW laser operation at 1.06 μm was also demonstrated for the first time. The maximum output power of 905 mW was achieved, with corresponding optical conversion efficiency of 10.8% and slope efficiency of 12.8%.
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Affiliation(s)
- Zhongben Pan
- State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan, China
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83
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Abstract
The spectra of Nd(3+):Lu(2)O(3) crystal have been examined at room temperature. Judd-Ofelt theory was applied to calculate the spectral parameters of the crystal. With a laser diode as pump source, a continuous-wave laser output power of 2.81 W is achieved, which is the highest value ever reported in this crystals to our knowledge, and its wavelength is also found to be dual-wavelength. Because of the emission cross-section at 1076 nm and 1080 nm are almost identical, laser oscillation for such two wavelengths can be obtained simultaneously. All the properties show that Nd:Lu2O3 is an excellent crystal for laser applications.
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Affiliation(s)
- Liangzhen Hao
- State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan, China
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84
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Cong H, Zhang H, Wang J. Morphological study of Czochralski-grown lanthanide orthovanadate single crystals and implications on the mechanism of spiral formation. Acta Crystallogr A 2011. [DOI: 10.1107/s010876731108843x] [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: 11/10/2022] Open
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85
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Wang F, Ding W, Wang J, Jing R, Wang X, Cong H, Wang Y, Ju S, Wang H. Identification of microRNA-target interaction in APRIL-knockdown colorectal cancer cells. Cancer Gene Ther 2011; 18:500-9. [PMID: 21597503 DOI: 10.1038/cgt.2011.19] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
MicroRNAs (miRNAs) regulate mammalian gene expression by targeting mRNAs and have key roles in several cellular processes, including differentiation, development, apoptosis and cancer pathomechanisms. Our previous studies have confirmed that a proliferation-inducing ligand (APRIL) gene is overexpressed in colorectal cancer (CRC) tumors and SW480 cells. To study the potential mechanisms of APRIL gene in the occurrence and development of the CRC, herein, we investigated whether APRIL-knockdown had the inhibitory effect on the growth of SW480 cells and had the simultaneous expression changes of miRNAs and mRNAs by microarrays. Our results suggest that siRNA-APRIL can effectively inhibit the growth of SW480 cells in vitro and in vivo and several miRNAs via specific pathways might be involved in regulating the phenotype of loss-of-function in APRIL-knockdown SW480 cells. Thus, our study highlights the possible mechanisms of miRNA-target regulating the function of APRIL gene in CRC cells, moreover, siRNA-APRIL holds great promise as a novel gene therapy approach for APRIL- positive CRC treatment.
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Affiliation(s)
- F Wang
- Department of Clinical Laboratory Center, Affiliated Hospital of Nantong University, School of Public Health, Nantong University, Nantong, China
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86
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Cong H, Zhang H, Sun S, Yu Y, Yu W, Yu H, Zhang J, Wang J, Boughton RI. Morphological study of Czochralski-grown lanthanide orthovanadate single crystals and implications on the mechanism of bulk spiral formation. J Appl Crystallogr 2010. [DOI: 10.1107/s0021889809052339] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Single crystals of monoclinic Nd:LaVO4with dimensions up to Ø28 × 21 mm have been grown from the near-stoichiometric melt by the Czochralski method, making use of various seed orientations that are perpendicular to the (010), (10{\overline 1}), (001) and (00{\overline 1}) crystal planes. A sample was also prepared with the seed orientation in an arbitrary direction relative to the crystal. The anisotropic properties of the crystal are manifested in the growth morphology of the as-grown crystals, where different degrees of bulk spiral growth were observed. It was also found that employing the (001) or (00{\overline 1}) seed faces severely suppressed the bulk spiral growth, and thus high quality and large-scale Nd:LaVO4crystals were obtained. The constituent segregation coefficients and high-temperature stability, including the melting point, were determined and evaluated. Based on the attachment energy model of Hartman–Perdok theory, morphology predictions were made for monoclinic LaVO4and tetragonal YVO4orthovanadate single crystals. Correlating with the as-grown morphology of both crystals developed along different seed orientations, a theoretical explanation is provided for the influences of seed crystals on bulk spiral formation, crystal quality and utilization ratio. It suggests that breaking the axial symmetry of the ideal atomic level interface between crystal and melt plays a crucial triggering role in bulk spiral formation in the Czochralski growth of lanthanide orthovanadate single crystals. Selecting a proper seed orientation that yields such a highly axially symmetric surface structure consisting of a series of large-area facets with similar growth velocities can greatly reduce bulk spiral formation and thus is preferable in the Czochralski growth of large-sized low-symmetry oxide crystals.
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87
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Cong H, Zhang H, Wang J, Yu W, Fan J, Cheng X, Sun S, Zhang J, Lu Q, Jiang C, Boughton RI. Structural and thermal properties of the monoclinic Lu2SiO5single crystal: evaluation as a new laser matrix. J Appl Crystallogr 2009. [DOI: 10.1107/s0021889809004269] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The crystal structure of monoclinic Lu2SiO5(LSO) crystals, grown by the Czochralski method, was determined at room temperature by X-ray diffraction. The unit-cell parameters area= 10.2550 (2),b= 6.6465 (2),c= 12.3626 (4) Å, β = 102.422 (1)° in space groupI2/a. The linear thermal expansion tensor was determined along thea,b,candc* directions over the temperature range from 303.15 to 768.15 K, and the principal coefficients of the thermal expansion tensor are found to be αI= −1.0235 × 10−6 K, αII= 4.9119 × 10−6 K and αIII= 10.1105 × 10−6 K. The temperature dependence of the cell volume and monoclinic angle were also evaluated. In addition, the specific heat and the thermal diffusivity were measured over the temperature ranges from 293.15 to 673.15 K and from 303.15 to 572.45 K, respectively. As a result, the anisotropic thermal conductivity could be calculated and is reported for the first time, to the best of the authors' knowledge. The specific heat capacity of LSO is 139.54 J mol−1 K−1, and the principal components of the thermal conductivity arekI= 2.26 W m−1 K−1,kII= 3.14 W m−1 K−1andkII= 3.67 W m−1 K−1at 303.15 K. A new structure model was proposed to better understand the relationships between the crystal structure and anisotropic thermal properties. In comparison with other laser matrix crystals, it is found that LSO possesses relatively large anisotropic thermal properties, and owing to its small heat capacity it has a moderate thermal conductivity, which is similar to those of the tungstates but lower than those of the vanadates.
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Cong H, Gu QM, Jiang Y, He SY, Zhou HY, Yang TT, Li Y, Zhao QL. Oral immunization with a live recombinant attenuated Salmonella typhimurium protects mice against Toxoplasma gondii. Parasite Immunol 2005; 27:29-35. [PMID: 15813720 DOI: 10.1111/j.1365-3024.2005.00738.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The natural site of infection for T. gondii is the mucosal surface of the intestine, so the protective immunity obtained after natural infection with T. gondii points to the importance of developing a vaccine that stimulates mucosal defences. In this study, an aroA- and aroD- attenuated strain of Salmonella typhimurium (BRD509) has been used to deliver the recombinant eukaryotic plasmid pSAG(1-2)/CTA2/B expressing a multi-antigenic gene encoding SAG1 and SAG2 of T. gondii linked to A2/B subunits of cholera toxin as a candidate oral T. gondii vaccine. Immunoblot analysis showed compound gene expression in HeLa cells in vitro and intragastric immunization of mice with the recombinant salmonella resulted in the induction of humoral and Th1 type cellular immune responses and afforded protection against RH strain T. gondii challenge. Anti-T. gondii IgG values increased markedly in the BRD509/pSAG(1-2)-CTA2/B immunized group; these values were significantly higher than those in the negative controls (P = 0.008). With CTA2/B genetic adjuvant, the T. gondii-specific response was predominantly Th1, indicating that the CTA(2)/B genetic adjuvant was able to overcome the strong Th2-bias of the antigen (IgG2a >> IgG1). Antigen-specific T cell proliferative responses and CTL activity were significantly enhanced when cholera toxin CTA2/B genetic adjuvant was used (P = 0.009; P = 0.006). Culture supernatants from antigen-stimulated splenocytes from mice in these groups were also examined by ELISA for Th1- and Th2-type cytokines; mean IFN-gamma levels produced after oral immunization with BRD509/pSAG(1-2)-CTA2/B were about nine-fold higher than after immunization with BRD509/pSAG(1-2) (P = 0.007). On the other hand, the levels of IL-4 were low for all groups and no increase was seen in the presence of CTA2/B genetic adjuvant. When the immunized mice were intraperitoneally challenged with 10(3) tachyzoites of the highly virulent RH strain, the survival time of the mice immunized with BRD509/pSAG(1-2)-CTA2/B was markedly longer than other groups (P = 0.003) and a 40% survival rate was achieved. This is the first report that demonstrates that an oral attenuated salmonella DNA vaccine can induce protective immunity against the acute phase of T. gondii infection.
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Affiliation(s)
- H Cong
- Department of Parasitology, Medical School, Shandong University, P.R. China.
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89
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Yuan Q, Cong H. [Analysis of the construction of creature valves frame]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2000; 17:360-2. [PMID: 11285858] [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: 02/19/2023]
Abstract
This paper analyses the construction of the creature valves frame according as the theory of Membrane in order to enable the creature valves to take the place of cardial valves of human being. It provides solid theoretical foundations for building the mathematical model and computer-aided design of the creature valves frame.
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Affiliation(s)
- Q Yuan
- Shandong Industry University, Jinan 250061
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90
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Sui H, Cong H, Wang S. [Primary microsurgical repair of multi-structural defects of hand]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 1998; 12:81-2. [PMID: 10374598] [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: 02/12/2023]
Abstract
Forty-eight cases of multi-structural defects of hands were primarily repaired or reconstructed from July 1989 to 1997. The structural defects included: the defects of radial or ulnar aspect of hands involving fingers and skin, multiple fingers defects and the fingers and skin defects of whole hand. In this series, there were 32 males and 16 females with age ranged from 17 to 46 years old. The composite tissue grafts were obtained from wrap-around flap or 2nd toe skin flap of the foot. The result showed that composite 108 tissues transplantations, or 48 cases, were all survived. After a follow-up of 38.5 months (ranged from 5 months to 6 years), the grasp, pinch and opposition function of the reconstructed finger were restored, the two-point discrimination sensation was 4 mm-12 mm. Most of the patients had resumed their original works. So that the primary repair of multi-structural defects of hands by composite tissues transplantation was feasible and valuable, but thorough debridement and skilled microsurgecal technique were required.
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Affiliation(s)
- H Sui
- Wendeng Orthopedic Hospital, Shandong, P. R. China
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91
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Sui H, Cong H, Wang S. [The clinical application of bridge by "Y" type vein]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 1998; 12:16-8. [PMID: 10374614] [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: 02/12/2023]
Abstract
UNLABELLED In order to solve the defect of blood vessel in tissue transplantation and complicated palmar amputation, bridge by "Y" type vein had been used from Jan. 1990 to Jul. 1996. Twenty-three cases were treated. In this series, there were 16 males and 7 females, with ages ranged from 10 to 42 years old. Six cases were the defect of lower legs anterior skin and tibia, 3 cases were the femur fracture with injury of femoral artery and tissue's defect, 2 cases were defect of five fingers, 12 cases were complicated palmar amputation. RESULT 15 cases with tissue transplantation and 12 cases with limb replantation were all survival without infection or necrosis. After the following-up for 3 years (ranged from 1 to 5 years), the function of injured limbs were satisfactory, 19 patients had resumed their original work. So, to bridge by "Y" type vein is a good method for repairing the defect of blood vessels in tissue transplantation and complicated palmar amputation, but skilled microsurgery technique is required.
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Affiliation(s)
- H Sui
- Wendeng Orthopedic Hospital, Shandong, P. R. China
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92
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Li Z, Zhang Q, Zhao S, Wei M, Cong H, Ouda H, Odajima K, Takemura H. High responsiveness of cytosolic free calcium concentration to angiotensin II in cultured pulmonary arterial myocytes from pulmonary hypertensive rats. Res Commun Mol Pathol Pharmacol 1997; 97:125-30. [PMID: 9344225] [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: 02/05/2023]
Abstract
Pulmonary arterial myocytes were cultured from normotensive and pulmonary hypertensive rats. Microfluorimetry of Ca2+ signals in fluo-3-loaded single myocytes at day 7 of culture was performed by a laser-scanned confocal imaging system. The resting level of cytoplasmic Ca2+ concentration ([Ca2+]i) in vascular myocytes obtained from hypertensive rats was higher than that in cultured myocytes obtained from normotensive rats. Angiotensin II elevated [Ca2+]i in the vascular myocytes cultured from both normotensive and hypertensive rats. However, a rise of [Ca2+]i induced by angiotensin II in the vascular myocytes obtained from pulmonary hypertensive rats was higher than that obtained from normotensive rats. On the other hand, the response of [Ca2+]i to A23187 did not differ between the vascular myocytes cultured from normotensive and hypertensive rats. The present results suggest that the resting and angiotensin II-responsive levels of [Ca2+]i in pulmonary arterial myocytes cultured from pulmonary hypertensive rats are higher than those cultured from normotensive rats.
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Affiliation(s)
- Z Li
- Department of Pharmacology, China Medical College, Shenyang
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93
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Li Z, Zhang Q, Zhao S, Wei M, Shenghui Z, Cong H, Ouda H, Odajima K, Takemura H. Responsiveness of cytosolic free calcium concentration in cultured rat pulmonary arterial smooth muscle cells: confocal microscopic measurement. Res Commun Mol Pathol Pharmacol 1997; 97:47-52. [PMID: 9507567] [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: 02/06/2023]
Abstract
Rat pulmonary arterial smooth muscle cells were primarily cultured. alpha-actins in pulmonary arterial smooth muscle cells at day 7 of culture were observed by an immunofluorescence staining method using anti-alpha-actin antibody. Microfluorimetry of Ca2+ signals in fluo-3-loaded single smooth cell at day 7 of culture was performed by a laser-scanned confocal imaging system. The effects of several kinds of Ca(2+)-mobilizing drugs on cytoplasmic Ca2+ concentration ([Ca2+]i) were examined. KCl, a depolarizing agent, and norepinephrine, an alpha-adrenergic agonist, equally increased [Ca2+]i. Angiotensin II, a receptor agonist, and caffeine, a Ca(2+)-induced Ca2+ releaser, elevated [Ca2+]i in the same manner but was more potent than KCl and norepinephrine. Br-A23187, a Ca2+ ionophore, most potently increased [Ca2+]i. The present results suggest that drug receptors on plasma membrane, Ca2+ entry pathways and Ca(2+)-releasing mechanisms act normally, and that our cultured pulmonary arterial smooth muscle cells may be a good model for the study on the essential role of Ca2+ in vasoconstriction.
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MESH Headings
- Adrenergic alpha-Agonists/pharmacology
- Animals
- Caffeine/pharmacology
- Calcimycin/pharmacology
- Calcium/metabolism
- Cells, Cultured
- Cytosol/metabolism
- Lung/blood supply
- Male
- Microscopy, Confocal
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Norepinephrine/pharmacology
- Potassium Chloride/pharmacology
- Pulmonary Artery/cytology
- Pulmonary Artery/drug effects
- Pulmonary Artery/metabolism
- Rats
- Rats, Sprague-Dawley
- Receptors, Angiotensin/agonists
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Affiliation(s)
- Z Li
- Department of Pharmacology, China Medical College, Shenyang, China
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94
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Cong H, Beck LR. Preparation and pharmacokinetic evaluation of a modified long-acting injectable norethisterone microsphere. Adv Contracept 1991; 7:251-6. [PMID: 1950722 DOI: 10.1007/bf01849415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Prototype long-acting formulations of norethisterone in the form of injectable microspheres made of biodegradable co-polymer of polylactic acid and glycolic acid have been successfully used as injectable contraceptives in women. Second-generation formulations with improved in vitro and in vivo norethisterone-release profiles have been developed and tested in baboons. A cyclic pattern of norethisterone release has been achieved by modification of the surface properties of the prototype formulation. One such modification, and the resulting effects on the in vitro and in vivo norethisterone release profiles will be presented and discussed.
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Affiliation(s)
- H Cong
- Department of Biochemistry, Family Planning Research Institute of Hebei Province, Shijiazhuang, China
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95
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Guo ZD, Li Z, Ruan Y, Cong H, Zhang KY. [Distribution of muscarinic receptors of different affinities in smooth muscle of human stomach]. Zhongguo Yao Li Xue Bao 1991; 12:180-3. [PMID: 1776486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Muscarinic receptors of high and low affinity were found in the fundus and the body of human stomach through the contraction experiment combined with ligand method in vitro. The 2 types of muscarinic receptors with different affinity regulated respectively the contractions of the longitudinal and the circular muscle of human gastric fundus and gastric body. However, in the antrum exists only one kind of muscarinic receptors of high affinity, which regulated the contractions of the longitudinal and the circular muscles of human stomach. The contractile force of the longitudinal muscle induced by exogenous ACh in the fundus and that in the body of human stomach were found to be similar to each other. The contractile force of the circular muscle in the body was found to be the strongest, and the contractile force of both longitudinal and circular muscles in antrum was weaker.
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Affiliation(s)
- Z D Guo
- Department of Pharmacology, China Medical University, Shenyang
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96
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Li Z, Ruan Y, Guo ZD, Cong H, Zhang KY, Takemura H. Function and localization of high and low affinity binding sites to muscarinic receptors in longitudinal and circular smooth muscles of human stomach. Res Commun Chem Pathol Pharmacol 1990; 67:31-42. [PMID: 2326547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The contractile response to acetylcholine (ACh) and the binding of [3H]-quinuclidinyl benzilate [( 3H]QNB) to muscarinic receptors in both longitudinal and circular muscles were examined in fundus, body and antrum of human stomach which was obtained by surgical operation for gastric cancer or ulcer. The values of pD2 and pA2 for ACh and atropine, respectively, on longitudinal muscle of fundus were similar to those of body but were larger than those of antrum. On the other hand, the values of pD2 and pA2 on circular muscles were not different among fundus, body, and antrum and were similar to those on longitudinal muscle of antrum. By Scatchard analysis of receptor binding of [3H]QNB in homogenate, at least two subclasses of binding sites, i.e. high and low affinity sites, were observed in fundus and body, while only high affinity binding site was found in antrum. Thus, we conclude that there are at least two subclasses of muscarinic receptors which regulate the contraction of smooth muscle in different regions of human stomach.
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Affiliation(s)
- Z Li
- Department of Pharmacology, Sapporo Medical College, Japan
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97
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Hall GS, Roach N, Simmons U, Cong H, Lee ML, Cummings E. Trace element analysis of maternal scalp hair by external beam proton-induced X-ray emission (PIXE). J Radioanal Nucl Chem 1984. [DOI: 10.1007/bf02037055] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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98
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Vandenbossche JL, Cong H, Englert M. [Diagnosis of ventricular aneurysms by echocardiography]. Rev Med Brux 1983; 4:69-74. [PMID: 6844768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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