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Wang X, Chen QZ, Zan YX, Wang MR, Yan J, Guo WW, Li KJ, Liu YY, Luo F, Feng Y, Hou W, Xiong HR. Exosomal miR-145-5p derived from orthohantavirus-infected endothelial cells inhibits HTNV infection. FASEB J 2020; 34:13809-13825. [PMID: 32808389 DOI: 10.1096/fj.202001114r] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 05/08/2020] [Revised: 07/31/2020] [Accepted: 08/05/2020] [Indexed: 01/22/2023]
Abstract
Human infection of orthohantavirus can cause potentially fatal diseases, such as hemorrhagic fever with renal syndrome (HFRS) caused by Hantaan virus (HTNV) in Eurasia. Exosomes are new carriers for information exchange between cells. Cumulative findings suggest that exosomes released from parental infected cells can block or promote viral infection in recipient cells, but the role of exosomes in hantavirus infection is poorly understood. In our study, we identified the exosomes derived from HTNV-infected human vascular endothelial cells (HUVECs) (Exo-HV) and found the antiviral properties of Exo-HV in the uninfected recipient cells. High-throughput sequencing revealed the distinctly expressed miRNAs transcriptomes in Exo-HV. MiR-145-5p, one of the abundant miRNAs packaged into Exo-HV, was found to be able to transferred to recipient cells and functioned by directly targeting M RNA of HTNV 76-118 and inducing type I interferon (IFN-I) response, thus, blocking the viral replication. Concluding, this study indicated that exosomes released by HTNV-infected HUVECs were able to transfer active molecules, miR-145-5p as a proving sample, to mediate novel anti-HTNV activity in the neighboring uninfected cells, which will help us to explore new strategies for the treatment of infectious disease utilizing exosomes with miRNA.
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Affiliation(s)
- Xin Wang
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China.,Wuhan Research Center for Infectious Disease and Cancer, Chinese Academy of Medical Sciences, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Qing-Zhou Chen
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China.,The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yu-Xing Zan
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Mei-Rong Wang
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Jie Yan
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Wei-Wei Guo
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Kai-Ji Li
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Yuan-Yuan Liu
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Fan Luo
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Yong Feng
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Wei Hou
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Hai-Rong Xiong
- State Key Laboratory of Virology/Institute of Medical Virology/Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
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Chen QZ, Wang X, Luo F, Li N, Zhu N, Lu S, Zan YX, Zhong CJ, Wang MR, Hu HT, Zhang YZ, Xiong HR, Hou W. HTNV Sensitizes Host Toward TRAIL-Mediated Apoptosis-A Pivotal Anti-hantaviral Role of TRAIL. Front Immunol 2020; 11:1072. [PMID: 32636833 PMCID: PMC7317014 DOI: 10.3389/fimmu.2020.01072] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Accepted: 05/04/2020] [Indexed: 01/15/2023] Open
Abstract
Hantaviruses can cause hemorrhagic fever with renal syndrome (HFRS) in Eurasia and have led to public health threat in China. The pathogenesis of HFRS is complex and involves capillary leakage due to the infection of vascular endothelial cells. Accumulating evidence has demonstrated that hantavirus can induce apoptosis in many cells, but the mechanism remains unclear. Our studies showed that Hantaan virus (HTNV) infection could induce TNF-related apoptosis-inducing ligand (TRAIL) expression in primary human umbilical vein endothelial cells (HUVECs) and sensitize host cells toward TRAIL-mediated apoptosis. Furthermore, TRAIL interference could inhibit apoptosis and enhance the production of HTNV as well as reduce IFN-β production, while exogenous TRAIL treatment showed reverse outcome: enhanced apoptosis and IFN-β production as well as a lower level of viral replication. We also observed that nucleocapsid protein (NP) and glycoprotein (GP) of HTNV could promote the transcriptions of TRAIL and its receptors. Thus, TRAIL was upregulated by HTNV infection and then exhibited significant antiviral activities in vitro, and it was further confirmed in the HTNV-infected suckling mice model that TRAIL treatment significantly reduced viral load, alleviated virus-induced tissue lesions, increased apoptotic cells, and decreased the mortality. In conclusion, these results demonstrate that TRAIL-dependent apoptosis and IFN-β production could suppress HTNV replication and TRAIL treatment might be a novel therapeutic target for HTNV infection.
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Affiliation(s)
- Qing-Zhou Chen
- State Key Laboratory of Virology, Hubei Province Key Laboratory of Allergy & Immunology, School of Basic Medical Sciences, Institute of Medical Virology, Wuhan University, Wuhan, China
| | - Xin Wang
- State Key Laboratory of Virology, Hubei Province Key Laboratory of Allergy & Immunology, School of Basic Medical Sciences, Institute of Medical Virology, Wuhan University, Wuhan, China
| | - Fan Luo
- State Key Laboratory of Virology, Hubei Province Key Laboratory of Allergy & Immunology, School of Basic Medical Sciences, Institute of Medical Virology, Wuhan University, Wuhan, China
| | - Ning Li
- State Key Laboratory of Virology, Hubei Province Key Laboratory of Allergy & Immunology, School of Basic Medical Sciences, Institute of Medical Virology, Wuhan University, Wuhan, China
| | - Ni Zhu
- Department of Microbiology, School of Basic Medical Sciences, Hubei University of Science and Technology, Xianning, China
| | - Shuang Lu
- State Key Laboratory of Virology, Hubei Province Key Laboratory of Allergy & Immunology, School of Basic Medical Sciences, Institute of Medical Virology, Wuhan University, Wuhan, China
| | - Yu-Xing Zan
- State Key Laboratory of Virology, Hubei Province Key Laboratory of Allergy & Immunology, School of Basic Medical Sciences, Institute of Medical Virology, Wuhan University, Wuhan, China
| | - Chao-Jie Zhong
- State Key Laboratory of Virology, Hubei Province Key Laboratory of Allergy & Immunology, School of Basic Medical Sciences, Institute of Medical Virology, Wuhan University, Wuhan, China
| | - Mei-Rong Wang
- State Key Laboratory of Virology, Hubei Province Key Laboratory of Allergy & Immunology, School of Basic Medical Sciences, Institute of Medical Virology, Wuhan University, Wuhan, China
| | - Hai-Tao Hu
- Department of Microbiology & Immunology and Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, TX, United States
| | - Yong-Zhen Zhang
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, National Institute for Communicable Disease Control and Prevention, Beijing, China
| | - Hai-Rong Xiong
- State Key Laboratory of Virology, Hubei Province Key Laboratory of Allergy & Immunology, School of Basic Medical Sciences, Institute of Medical Virology, Wuhan University, Wuhan, China
| | - Wei Hou
- State Key Laboratory of Virology, Hubei Province Key Laboratory of Allergy & Immunology, School of Basic Medical Sciences, Institute of Medical Virology, Wuhan University, Wuhan, China.,Department of Microbiology, School of Basic Medical Sciences, Hubei University of Science and Technology, Xianning, China
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Li NX, Xu JF, Yin W, Chen QZ, Wang J, Shi ZH. Effect of local watershed landscapes on the nitrogen and phosphorus concentrations in the waterbodies of reservoir bays. Sci Total Environ 2020; 716:137132. [PMID: 32045768 DOI: 10.1016/j.scitotenv.2020.137132] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 02/03/2020] [Accepted: 02/03/2020] [Indexed: 06/10/2023]
Abstract
Reservoir bays, which are affected by the reservoir and watershed characteristics, are the initial and most sensitive areas in the evolution process of reservoir water quality. However, the relationship between the watershed characteristics and nitrogen and phosphorus concentrations in reservoir bays is poorly understood. We selected 66 bays from the Danjiangkou Reservoir and sampled twice per year (storage and discharge periods) from 2015 to 2018 to monitor the total nitrogen (TN) and total phosphorus (TP) concentration in the waterbodies of the reservoir bays. Four types of watershed characteristic indices (topographic variables, soil variables, land-use composition, and landscape patterns) around these bays were obtained. We quantified the relationship between the TN and TP concentrations and watershed characteristics in the waterbodies of the reservoir bays using partial least squares regression (PLSR). The results showed that the mean concentrations of TN and TP in the storage period (TN:1.69 mg·L-1, TP:0.088 mg·L-1) were higher than those in the discharge period (TN:1.22 mg·L-1, TP:0.063 mg·L-1). The optimal PLSR models explained 67.9% and 82.5% of the TN concentration variability, and 65.4% and 67.2% of the TP concentration variability during the storage and discharge period, respectively. Based on the variable importance in the projection (VIP) values, soil erodibility had significant effects on the TN and TP concentrations. The key factors affecting the TN concentration were the slope gradient, basin relief, topographic wetness index, forest and agricultural land use, whereas the factors controlling the TP concentration were the landscape shape index, edge density, Shannon's diversity index and grass land use, although the TP concentration was also controlled by the patch density and contagion during the storage period, and by mean patch size and largest patch index during the discharge period. This study provides critical insights into sustainable landscape planning and effective reservoir water quality management.
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Affiliation(s)
- N X Li
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, China
| | - J F Xu
- The Yangtze River Water Resources Protection Science Institute, Wuhan 430051, China
| | - W Yin
- The Yangtze River Water Resources Protection Science Institute, Wuhan 430051, China
| | - Q Z Chen
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, China
| | - J Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, China.
| | - Z H Shi
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling, Shaanxi 712100, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, China.
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Chen QZ, Luo F, Lu MX, Li N, Teng Y, Huang QL, Zhu N, Wang GY, Yue M, Zhang Y, Feng Y, Xiong HR, Hou W. HTNV-induced upregulation of miR-146a in HUVECs promotes viral infection by modulating pro-inflammatory cytokine release. Biochem Biophys Res Commun 2017; 493:807-813. [PMID: PMID: 28843856 DOI: 10.1016/j.bbrc.2017.08.073] [Citation(s) in RCA: 10] [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] [Received: 08/16/2017] [Accepted: 08/19/2017] [Indexed: 10/19/2022]
Abstract
Increasing research has shown a link between viruses and miRNAs, such as miRNA-146a, in regulating virus infection and replication. In the current study, the association between miR-146a and hantaan virus (HTNV) infection in human umbilical vein endothelial cells (HUVECs) was investigated, with a focus on examining the expression of pro-inflammatory cytokines. The results showed that HTNV infection promoted the production of miR-146a in HUVECs and activated nuclear factor-κB (NF-κB) signaling, along with the upregulation of pro-inflammatory cytokines, including interleukin 8 (IL-8), C-C Motif Chemokine Ligand 5 (CCL5, also RANTES), interferon-inducible protein-10 (IP-10) and interferon beta (IFN-β). Moreover, miR-146a exhibited a negative regulatory effect on the NF-κB pathway. Accordingly, a miR-146a inhibitor increased the expression of IL-8, CCL5, IP-10 and IFN-β, whereas a miR-146a mimic reduced the levels of these cytokines. Consequently, exogenous transduction of miR-146a significantly enhanced HTNV replication in HUVEC cells. We also discovered that viral proteins (NP/GP) contributed to miR-146a expression via enhancement the activity of miR-146a promoter. In conclusion, these results imply the negative regulation of miR-146a on the production of HTNV-induced pro-inflammatory cytokines contributes to virus replication, which suggest that miR-146a may be regarded as a novel therapeutic target for HTNV infection.
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Affiliation(s)
- Qing-Zhou Chen
- State Key Laboratory of Virology, Institute of Medical Virology, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, Hubei Province, China
| | - Fan Luo
- State Key Laboratory of Virology, Institute of Medical Virology, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, Hubei Province, China
| | - Ming-Xiang Lu
- Center for Gene Diagnosis, Zhongnan Hospital, Wuhan University, 169 Donghu Road, Wuhan 430071, Hubei Province, China
| | - Ning Li
- State Key Laboratory of Virology, Institute of Medical Virology, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, Hubei Province, China
| | - Yan Teng
- State Key Laboratory of Virology, Institute of Medical Virology, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, Hubei Province, China
| | - Qiu-Ling Huang
- State Key Laboratory of Virology, Institute of Medical Virology, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, Hubei Province, China
| | - Ni Zhu
- School of Basic Medicine, Hubei University of Science and Technology, No.88 Xianning Avenue, Xianning 437100, Hubei Province, China
| | - Guan-Yi Wang
- State Key Laboratory of Virology, Institute of Medical Virology, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, Hubei Province, China
| | - Ming Yue
- Department of Infectious Diseases, The First Affiliated Hospital of Nanjing Medical University, No.300 Guangzhou Road, Nanjing 210029, Jiangsu Province, China
| | - Yun Zhang
- Institute of Military Medical Sciences Nanjing Command, Nanjing 210002, Jiangsu Province, China
| | - Yong Feng
- State Key Laboratory of Virology, Institute of Medical Virology, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, Hubei Province, China
| | - Hai-Rong Xiong
- State Key Laboratory of Virology, Institute of Medical Virology, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, Hubei Province, China.
| | - Wei Hou
- State Key Laboratory of Virology, Institute of Medical Virology, Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, 185 Donghu Road, Wuhan 430071, Hubei Province, China; School of Basic Medicine, Hubei University of Science and Technology, No.88 Xianning Avenue, Xianning 437100, Hubei Province, China.
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Chen XP, Xiong HR, Zhu N, Chen QZ, Wang H, Zhong CJ, Wang MR, Lu S, Luo F, Hou W. Lack of association between integrin α vβ 3 gene polymorphisms and hemorrhagic fever with renal syndrome in Han Chinese from Hubei, China. Virol Sin 2017; 32:73-79. [PMID: 28190175 DOI: 10.1007/s12250-016-3888-0] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 01/04/2017] [Indexed: 11/28/2022] Open
Abstract
Hantaviruses belong to the family Bunyaviridae and cause hemorrhagic fever with renal syndrome (HFRS) in humans. β3 integrins, including αVβ3 and αIIbβ3 integrins, act as receptors on endothelial cells and play key roles in cellular entry during the pathogenesis of hantaviruses. Previous study demonstrated that the polymorphisms of integrin αIIbβ3 are associated with susceptibility to hantavirus infection and the disease severity of HFRS in Shaanxi Province of China, rather than in Finland. However, the polymorphisms of integrin αvβ3 in patients with HFRS was incompletely understood. Here, we aimed to investigate the associations between polymorphisms in human integrin αvβ3 and HFRS in Han Chinese individuals. Ninety patients with HFRS and 101 healthy controls were enrolled in this study. Analysis of five single nucleotide polymorphism (SNP) sites (rs3768777 and rs3738919 on ITGAV; rs13306487, rs5921, and rs5918 on ITGB3) was performed by TaqMan SNP genotyping assays and bi-directional PCR allele-specific amplification method. No significant differences were observed between the HFRS group and controls regarding the genotype and allele frequency distributions of any of the five SNP sites, and no associations were found between ITGAV polymorphisms/genotypes and disease severity. In conclusion, our results implied that these five SNPs in the integrin αvβ3 gene were not associated with HFRS susceptibility or severity in Han Chinese individuals in Hubei Province.
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Affiliation(s)
- Xiao-Ping Chen
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Hai-Rong Xiong
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Ni Zhu
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Qing-Zhou Chen
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Hui Wang
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Chao-Jie Zhong
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Mei-Rong Wang
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Shuang Lu
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Fan Luo
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Wei Hou
- State Key Laboratory of Virology, Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China.
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Abstract
UNLABELLED This retrospective study was designed to investigate the prevalence, characteristics and natural history of cold intolerance after the use of the reverse digital artery flap. A total of 123 patients were treated between 2010 and 2013. After excluding patients who were lost to follow-up, 87 patients were studied. The mean follow-up time was 34 months (range 14-61). Cold intolerance occurred in 60% (52) of patients after the reverse digital artery flap procedure. The condition improved in only 15% (8) of the patients. Significant differences were observed in the age and the specific digit involved between the groups with and without cold intolerance. There was a lower incidence in younger patients, and the ring finger group showed a lower incidence than in other fingers. Furthermore, the Cold Intolerance Symptom Severity score was positively correlated with the temperature at which cold intolerance was triggered. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Y C Sun
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
| | - Q Z Chen
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
| | - J Chen
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
| | - Z W Qian
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
| | - J Kong
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
| | - Y P Gong
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
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Affiliation(s)
- Y C Sun
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - Y P Gong
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - Q Z Chen
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
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Chen QZ, Sun YC, Chen J, Kong J, Gong YP, Mao T. Comparative study of functional and aesthetically outcomes of reverse digital artery and reverse dorsal homodigital island flaps for fingertip repair. J Hand Surg Eur Vol 2015; 40:935-43. [PMID: 25862526 DOI: 10.1177/1753193415579300] [Citation(s) in RCA: 26] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Accepted: 01/18/2015] [Indexed: 02/03/2023]
Abstract
UNLABELLED This retrospective study was designed to compare functional and cosmetic outcomes of the reverse digital artery island flap and reverse dorsal homodigital island flap in fingertip repair. A total of 23 patients were followed for 24 to 30 months. The reverse digital artery island flap was used in 12 patients, and reverse dorsal homodigital island flap in another 11 patients. Flap sensibility was assessed using the Semmes-Weinstein monofilament test and static 2-point discrimination test. Patient satisfaction, active motion of the finger joints, complications and cold intolerance were evaluated. The static 2-point discrimination and Michigan Hand Outcomes Questionnaire (appearance) of the fingers treated with a reverse digital artery flap were significantly better than those with a reverse dorsal homodigital flap. The static 2-point discrimination of the skin-grafted donor sides after dorsal homodigital flap were poorer than that in the contralateral finger. No significant differences were found between the two flaps for pressure or touch sensibility, active ranges of digital motion, complications and cold intolerance. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Q Z Chen
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
| | - Y C Sun
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
| | - J Chen
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
| | - J Kong
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
| | - Y P Gong
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
| | - T Mao
- Department of Hand Surgery, Affiliated Hospital of Nantong University, Jiangsu, China
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Wu XB, Su DX, Pan ZG, Lu CJ, Chen QZ, Zhan TZ. HIF-1α and COX-2 expression in varioliform gastritis. Shijie Huaren Xiaohua Zazhi 2014; 22:5680-5683. [DOI: 10.11569/wcjd.v22.i36.5680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To examine the expression of hypoxia-inducible factor-1α (HIF-1α) and cyclooxygenase-2 (COX-2) in varioliform gastritis.
METHODS: The expression of HIF-1α and COX-2 in varioliform gastritis specimens and chronic superficial gastritis specimens was detected by immunohistochemistry.
RESULTS: Significant expression of HIF-1α and COX-2 was detected in chronic superficial gastritis and immature and mature verrucous gastritis (P < 0.05). The positive rates of HIF-1α and COX-2 expression were significantly higher in varioliform gastritis than in chronic superficial gastritis (42.5% vs 18.2%, χ2 = 12.777, P < 0.05; 46.4% vs 13.0%, χ2 = 23.991, P < 0.05).
CONCLUSION: High expression of HIF-1α and COX-2 was detected in varioliform gastritis.
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Chen QZ, Efthymiou A, Salih V, Boccaccini AR. Bioglass-derived glass-ceramic scaffolds: study of cell proliferation and scaffold degradation in vitro. J Biomed Mater Res A 2008; 84:1049-60. [PMID: 17685403 DOI: 10.1002/jbm.a.31512] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Cell support function as well as cell proliferation on highly porous Bioglass(R)-derived glass-ceramic scaffolds (designed for bone tissue engineering) have been assessed in vitro using osteoblast-like cells (MG 63) cultured for up to 6 days. The biodegradation and mechanical stability of the scaffolds in the cell-culture medium have also been investigated. It was found that the scaffolds had excellent cell supporting ability, with cells effectively infiltrating into and surviving at the center of the scaffolds. A quantitative study using the AlamarBlue assay revealed that the proliferation of cells on the glass-ceramic materials was comparable to that on the noncrystallized Bioglass. While the crystalline phase in the glass-ceramic scaffolds transformed into a biodegradable amorphous calcium phosphate phase during cell culture, the mechanical strength of the scaffolds was maintained when compared with that of scaffolds incubated in simulated body fluid or immersed in cell-free culture medium. It is believed that the attached cells and collagen secreted by cells could fill the micropores and microcracks on the surface of the foam struts, thus contributing to the mechanical stability of the degrading scaffolds. In summary, the developed glass-ceramic scaffolds possess the most essential features of a scaffold for bone tissue engineering: they are capable to support and foster relevant cells, able to provide temporary mechanical function, and biodegradable.
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Affiliation(s)
- Q Z Chen
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2BP, United Kingdom
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Abstract
Myocardial tissue engineering, a concept that intends to overcome the obstacles to prolonging patients' life after myocardial infarction, is continuously improving. It comprises a biomaterial based 'vehicle', either a porous scaffold or dense patch, made of either natural or synthetic polymeric materials, to aid transportation of cells into the diseased region in the heart. Many different cell types have been suggested for cell therapy and myocardial tissue engineering. These include both autologous and embryonic stem cells, both having their advantages and disadvantages. Biomaterials suggested for this specific tissue-engineering application need to be biocompatible with the cardiac cells and have particular mechanical properties matching those of native myocardium, so that the delivered donor cells integrate and remain intact in vivo. Although much research is being carried out, many questions still remain unanswered requiring further research efforts. In this review, we discuss the various approaches reported in the field of myocardial tissue engineering, focusing on the achievements of combining biomaterials and cells by various techniques to repair the infarcted region, also providing an insight on clinical trials and possible cell sources in cell therapy. Alternative suggestions to myocardial tissue engineering, in situ engineering and left ventricular devices are also discussed.
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Affiliation(s)
- H Jawad
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2BP, UK
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Maeda H, Maquet V, Kasuga T, Chen QZ, Roether JA, Boccaccini AR. Vaterite deposition on biodegradable polymer foam scaffolds for inducing bone-like hydroxycarbonate apatite coatings. J Mater Sci Mater Med 2007; 18:2269-73. [PMID: 17562142 DOI: 10.1007/s10856-007-3108-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2005] [Accepted: 07/10/2006] [Indexed: 05/15/2023]
Abstract
Hydroxycarbonate apatite (HCA) coatings on the surface of bioresorbable materials for bone tissue engineering scaffolds were produced using macroporous poly(DL-lactide) (PDLLA) foams impregnated by calcium carbonate in vaterite crystalline form. Stable and homogeneous vaterite deposition on PDLLA foams was achieved using a slurry dipping technique. In vitro studies in simulated body fluid (SBF) were performed to induce formation of (HCA) on the surface of vaterite/PDLLA composite foams. HCA was detected after immersion of foams in SBF for 7 days. Hence, depositing vaterite on materials followed by immersion in SBF is confirmed to induce HCA coatings on the surface of the material. The HCA coated, bioactive and resorbable PDLLA foams are intended for use as bone tissue engineering scaffolds.
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Affiliation(s)
- H Maeda
- Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
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Abstract
A comparative investigation has been carried out on the mechanical properties and bioactivity of Bioglass-based foams, before and after applying a poly(D,L-lactic acid) (PDLLA) coating layer on the foam struts. It was found that the bioactivity of foams upon immersion in simulated body fluid (SBF) was maintained in the PDLLA-coated foams; however, the transformation kinetics in SBF of the crystalline phase (Na(2)Ca(2)Si(3)O(9)) in the foam struts to an amorphous calcium phosphate phase was retarded by PDLLA coating. The compressive and three-point bending strengths of the Bioglass-based foams were slightly improved by the PDLLA-coating, and the work-of-fracture of the foams was considerably enhanced, as indicated by stress-strain curves. Immersion in SBF for 4 weeks led to a large decrease of the mechanical strength of as-sintered foams decreased (from 0.3 to 0.03 MPa), because of the transformation of the crystalline phase to an amorphous calcium phosphate. On the other hand, the mechanical strength was well-maintained in PDLLA-coated foams after immersion in SBF for 8 weeks. This behavior was attributed to the in-situ formation of a nanocomposite PDLLA/calcium phosphate film on the strut surfaces upon immersion in SBF.
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Affiliation(s)
- Q Z Chen
- Department of Materials, Imperial College London, London SW7 2BP, United Kingdom
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Chen QZ, Rezwan K, Armitage D, Nazhat SN, Boccaccini AR. The surface functionalization of 45S5 Bioglass-based glass-ceramic scaffolds and its impact on bioactivity. J Mater Sci Mater Med 2006; 17:979-87. [PMID: 17122908 DOI: 10.1007/s10856-006-0433-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2005] [Accepted: 02/27/2006] [Indexed: 05/12/2023]
Abstract
The first and foremost function of a tissue engineering scaffold is its role as a substrate for cell attachment, and their subsequent growth and proliferation. However, cells do not attach directly to the culture substrate; rather they bind to proteins that are adsorbed to the scaffold's surface. Like standard tissue culture plates, tissue engineering scaffolds can be chemically treated to couple proteins without losing the conformational functionality; a process called surface functionalization. In this work, novel highly porous 45S5 Bioglass-based scaffolds have been functionalized applying 3-AminoPropyl-TriethoxySilane (APTS) and glutaraldehyde (GA) without the use of organic solvents. The efficiency and stability of the surface modification was assessed by X-ray photoemission spectroscopy (XPS). The bioactivity of the functionalized scaffolds was investigated using simulated body fluid (SBF) and characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). It was found that the aqueous heat-treatment applied at 80 degrees C for 4 hrs during the surface functionalization procedure accelerated the structural transition of the crystalline Na2Ca2Si3O9 phase, present in the original scaffold structure as a result of the sintering process used for fabrication, to an amorphous phase during SBF immersion. The surface functionalized scaffolds exhibited an accelerated crystalline hydroxyapatite layer formation upon immersion in SBF caused by ion leaching and the increased surface roughness induced during the heat treatment step. The possible mechanisms behind this phenomenon are discussed.
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Affiliation(s)
- Q Z Chen
- Department of Materials, Imperial College London, Prince Consort Road, London, SW7 2BP, UK
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Rezwan K, Chen QZ, Blaker JJ, Boccaccini AR. Biodegradable and bioactive porous polymer/inorganic composite scaffolds for bone tissue engineering. Biomaterials 2006; 27:3413-31. [PMID: 16504284 DOI: 10.1016/j.biomaterials.2006.01.039] [Citation(s) in RCA: 2108] [Impact Index Per Article: 117.1] [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: 12/06/2005] [Accepted: 01/31/2006] [Indexed: 11/27/2022]
Abstract
Biodegradable polymers and bioactive ceramics are being combined in a variety of composite materials for tissue engineering scaffolds. Materials and fabrication routes for three-dimensional (3D) scaffolds with interconnected high porosities suitable for bone tissue engineering are reviewed. Different polymer and ceramic compositions applied and their impact on biodegradability and bioactivity of the scaffolds are discussed, including in vitro and in vivo assessments. The mechanical properties of today's available porous scaffolds are analyzed in detail, revealing insufficient elastic stiffness and compressive strength compared to human bone. Further challenges in scaffold fabrication for tissue engineering such as biomolecules incorporation, surface functionalization and 3D scaffold characterization are discussed, giving possible solution strategies. Stem cell incorporation into scaffolds as a future trend is addressed shortly, highlighting the immense potential for creating next-generation synthetic/living composite biomaterials that feature high adaptiveness to the biological environment.
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Affiliation(s)
- K Rezwan
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2BP, UK
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17
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Chen QZ, Blaker JJ, Boccaccini AR. Bioactive and mechanically strong Bioglass®-poly(D,L-lactic acid) composite coatings on surgical sutures. J Biomed Mater Res B Appl Biomater 2006; 76:354-63. [PMID: 16161126 DOI: 10.1002/jbm.b.30379] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
New coating processes have been investigated for degradable (Vicryl) and nondegradable (Mersilk) sutures with the aim to develop Bioglass coated polymer fibers for wound healing and tissue engineering scaffold applications. First, the aqueous phase of a Bioglass particle slurry was replaced with a poly(D,L-lactic acid) (PDLLA) polymer dissolved in solvent dimethyle carbonate (DMC) to act as third phase. SEM observations indicated that this alteration significantly improved the homogeneity of the coatings. Second, a new coating strategy involving two steps was developed: the sutures were first coated with a Bioglass-PDLLA composite film followed by a second PDLLA coating. This two-step process of coating has addressed the problem of poor adherence of Bioglass particles on suture surfaces. The coated sutures were knotted to determine qualitatively the mechanical integrity of the coatings. The results indicated that adhesion strength of coatings obtained by the two-step method was remarkably enhanced. A comparative assessment of the bioactivity of one-step and two-step produced coatings was carried out in vitro using acellular simulated body fluid (SBF) for up to 28 days. Coatings produced by the two-step process were found to have similar bioactivity as the one-step produced coatings. The novel Bioglass/PDLLA/Vicryl and Bioglass/PDLLA/Mersilk composite sutures are promising bioactive materials for wound healing and tissue engineering applications.
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Affiliation(s)
- Q Z Chen
- Department of Materials and Centre for Tissue Engineering and Regenerative Medicine, Imperial College London, London SW7 2BP, United Kingdom
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Chen QZ, Wong CT, Lu WW, Cheung KMC, Leong JCY, Luk KDK. Strengthening mechanisms of bone bonding to crystalline hydroxyapatite in vivo. Biomaterials 2004; 25:4243-54. [PMID: 15046914 DOI: 10.1016/j.biomaterials.2003.11.017] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2003] [Accepted: 11/11/2003] [Indexed: 11/16/2022]
Abstract
The formation and strengthening mechanisms of bone bonding of crystalline hydroxyapatite (HA) has been investigated using high-resolution transmission electron microscope (HRTEM) and energy-dispersive X-ray (EDX) analysis. A series of results were obtained: (i) a layer of amorphous HA, which has almost the same chemistry as the implanted HA, was formed on the surface of crystalline HA particles prior to dissolution; (ii) at 3 months a bone-like tissue formed a bonding zone between mature bone and the HA implant, composed of nanocrystalline and amorphous apatite; and (iii) at 6 months, mature bone was in direct contact with HA particles, and collagen fibres were perpendicularly inserted into the surface layer of implanted HA crystals. Findings (i) and (ii) indicated the following dissolution-precipitation process. (i) The crystalline HA transforms into amorphous HA; (ii) the amorphous HA dissolves into the surrounding solution, resulting in over-saturation; and (iii) the nanocrystallites are precipitated from the over-saturated solution in the presence of collagen fibres. A preliminary analysis indicated several conclusions: (i) the transition from crystalline to amorphous HA might be the controlling step in the bone bonding of crystalline HA; (ii) biological interdigitation (or incorporation) of collagen fibres with HA and chemical bonding of a apatite layer were both necessary to strengthen and toughen a bone bond, not only for the bonding between bone and HA at 6 months, but also for the bonding zone at 3 months, which would otherwise be very fragile due to the inherited brittleness of polycrystalline ceramics; and (iii) perpendicular interdigitation is an effective way for collagen fibres to impart their unique combination of flexibility and strength to the interface which they are keying.
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Affiliation(s)
- Q Z Chen
- Department of Mechanical Engineering, University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China.
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Wong CT, Chen QZ, Lu WW, Leong JCY, Chan WK, Cheung KMC, Luk KDK. Ultrastructural study of mineralization of a strontium-containing hydroxyapatite (Sr-HA) cementin vivo. ACTA ACUST UNITED AC 2004; 70:428-35. [PMID: 15293316 DOI: 10.1002/jbm.a.30097] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The purpose of this study was to investigate the mineralization leading to osseointegration of strontium-containing hydroxyapatite (Sr-HA) bioactive bone cement injected into cancellous bone in vivo. Sr-HA cement was injected into the ilium of rabbits for 1, 3, and 6 months. The bone mineralization area was found to be largest at 3 months, then at 1 month, and smallest at 6 months (p < 0.01) measured with tetracycline labeling. Osseointegration of Sr-HA cement was achieved at 3 months as observed by scanning electron microscopy. A high calcium and phosphorus area was observed at the interface of bone-Sr-HA cement determined by energy-dispersive X-ray analysis. Transmission electron microscopy gave evidence of the mechanism of bone formation. Dissolution of Sr-HA into debris by the bone remodeling process was thought to increase the concentration of calcium and phosphorus at the interface of bone-Sr-HA cement and stimulate bone formation. Crystalline Sr-HA formed an amorphous layer and dissolved into the surrounding solution, then apatite crystallites were precipitated and formed new bone at 3 months. This young bone then becomes mature bone, which bonds tightly to the Sr-HA cement with collagen fibers inserted perpendicularly after 6 months.
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Affiliation(s)
- C T Wong
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Hong Kong, Hong Kong SAR
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Fang XY, Guo SH, Liu JM, Chen QZ. Coupled-cluster expansions for the lattice O(3) sigma model. Phys Rev D Part Fields 1996; 54:6521-6526. [PMID: 10020653 DOI: 10.1103/physrevd.54.6521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Liu DY, Chen QZ, Liu GM. [The changes in retinol-binding protein, N-acetyl-beta-glucosaminidase, albumin and IgG in urine before and after ESWL]. Zhonghua Wai Ke Za Zhi 1994; 32:570-2. [PMID: 7720435] [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: 01/26/2023]
Abstract
The retinol-binding protein (RBP), N-acetyl-beta-glucosaminidase, (NAG) albumin (alb) and IgG in urine were measured from 67 patients with urinary stone before and after ESWL. The results showed that the amount of alb, IgG and RBP in urine was obviously increased for the patients with renal, upper ureteral or lower ureteral stone associated with hydronephrosis. ESWL may injure the glomerule and tubules by direct or indirect action. 2 weeks after ESWL, the alb, IgG and RBP in urine returned to normal in 56.8%, 70.3% and 51.4% of cases respectively. Therefore we suggest that retreatment should be put off as late as 2 weeks after the first ESWL. However, it is not limited for retreatment of lower ureteral stones without hydro nephrosis.
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Affiliation(s)
- D Y Liu
- Ruijin Hospital, Shanghai Second Medical University
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22
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Chen QZ, Guo SH, Zheng WH, Fang XY. Fourth-order calculation of the vacuum wave function and mass gap of SU(2) lattice gauge theory in 2+1 dimensions. Int J Clin Exp Med 1994; 50:3564-3565. [PMID: 10017995 DOI: 10.1103/physrevd.50.3564] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Liu DY, Chen QZ, Zheng CD. [Diagnostic value of imaging in localizing primary aldosteronism]. Zhonghua Wai Ke Za Zhi 1994; 32:295-8. [PMID: 7842947] [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: 01/27/2023]
Abstract
From May 1985 to March 1993, 159 patients with primary aldosteronism were treated surgically. The results of localization of aldosteronomas by B-type ultrasonography, CT and scintigraphy in 103 were compared with pathological results. The accurate rate of the modalities was 80.6%, 75.8% and 67.4% respectively. As a routine, we usually employ sonography and CT for localizing aldosteronomas. Only when difficulty was encountered with these two methods, scintigraphy was added. In our series, an accurate rate of 96.1% was obtained in surgical explorations with these imaging examinations with a consideration of clinical data.
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Affiliation(s)
- D Y Liu
- Ruijin Hospital of Shanghai Second Medical University
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Guo SH, Chen QZ, Li L. Analytic calculation of the vacuum wave function for (2+1)-dimensional SU(2) lattice gauge theory. Int J Clin Exp Med 1994; 49:507-510. [PMID: 10016788 DOI: 10.1103/physrevd.49.507] [Citation(s) in RCA: 24] [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: 11/07/2022]
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26
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Luo XQ, Chen QZ. Vacuum structure and chiral-symmetry breaking in (2+1)-dimensional lattice gauge theories with fermions. Int J Clin Exp Med 1992; 46:814-823. [PMID: 10014992 DOI: 10.1103/physrevd.46.814] [Citation(s) in RCA: 9] [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: 11/07/2022]
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