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Han JF, Ding F, Liu J, Dai LZ. Multicenter evaluation of a novel HIV-1 high-sensitivity nucleic-acid detection reagent. Asian J Surg 2024; 47:1069-1070. [PMID: 38036367 DOI: 10.1016/j.asjsur.2023.10.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 10/27/2023] [Indexed: 12/02/2023] Open
Affiliation(s)
- Jian-Feng Han
- Department of Medical Affairs, Sansure Biotech Inc., National and Local Joint Engineering Research Center for Infectious Diseases and Tumor Gene Diagnosis Technology, Changsha, 410205, China
| | - Feng Ding
- Institute of Life Sciences, Sansure Biotech Inc., National and Local Joint Engineering Research Center for Infectious Diseases and Tumor Gene Diagnosis Technology, Changsha, 410205, China
| | - Juan Liu
- Department of Medical Affairs, Sansure Biotech Inc., National and Local Joint Engineering Research Center for Infectious Diseases and Tumor Gene Diagnosis Technology, Changsha, 410205, China
| | - Li-Zhong Dai
- Department of Medical Affairs, Sansure Biotech Inc., National and Local Joint Engineering Research Center for Infectious Diseases and Tumor Gene Diagnosis Technology, Changsha, 410205, China; Institute of Life Sciences, Sansure Biotech Inc., National and Local Joint Engineering Research Center for Infectious Diseases and Tumor Gene Diagnosis Technology, Changsha, 410205, China.
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Wang W, Zhang LM, Guo C, Han JF. Resveratrol promotes osteoblastic differentiation in a rat model of postmenopausal osteoporosis by regulating autophagy. Nutr Metab (Lond) 2020; 17:29. [PMID: 32322287 PMCID: PMC7160943 DOI: 10.1186/s12986-020-00449-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 09/03/2019] [Accepted: 04/06/2020] [Indexed: 02/08/2023] Open
Abstract
OBJECTIVE Resveratrol is a natural polyphenolic compound that ameliorates postmenopausal osteoporosis by activating the estrogen receptor. Research has shown that resveratrol exhibits some type of estrogen receptor agonist activity, reducing the risk of breast cancer. However, its mechanism of action remains largely unknown. This study aims to investigate the effect of resveratrol on osteoblastic and osteoclastic differentiation and its potential role in the regulation of autophagy. METHODS Sprague Dawley (SD) rats underwent ovariectomies (OVX) and were administered resveratrol (at 10, 20 or 40 mg/kg/d) for 8 weeks. The calcium content and the bone mineral density (BMD) were measured in the lumbar vertebrae (L3) and the right distal femur-tibia bone region. The osteoblasts and osteoclasts were isolated from rat lumbar vertebrae by enzyme digestion and bone marrow induction, respectively. The cells were then cultured with resveratrol in combination with bafilomycin or leupeptin to inhibit or activate autophagy, respectively. Western blotting was used to assess the differentiation markers and autophagy-related genes in the osteoblasts and osteoclasts. RESULTS Compared to the sham group, the bone calcium content and BMD were significantly decreased in the OVX group (p < 0.05), while resveratrol attenuated these in a dose-dependent manner. In the osteoblasts, vascular endothelial growth factor (VEGF), and alpha-1 type I collagen (COL1A1) were markedly decreased, and in osteoclasts, the receptor activator of nuclear factor-κB ligand (RANKL) was increased in the OVX group, while resveratrol reversed this pattern in a dose-dependent manner. The inhibition of autophagy in osteoblasts and its activation in osteoclasts was observed in the OVX group. However, with resveratrol, this was reversed in a dose-dependent manner. CONCLUSION Overall, resveratrol promotes osteoblastic differentiation and suppresses osteoclastic differentiation in a rat model with postmenopausal osteoporosis by regulating autophagy.
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Affiliation(s)
- Wei Wang
- Department of Endocrinology, the Second Affiliated Hospital of Harbin Medical University, Harbin, 150086 China
| | - Li-Mei Zhang
- Endocrinology Laboratory, the Second Affiliated Hospital of Harbin Medical University, Harbin, 150086 China
| | - Chang Guo
- Department of Endocrinology, the Second Affiliated Hospital of Harbin Medical University, Harbin, 150086 China
| | - Jian-Feng Han
- Department of Orthopaedics, the Second Affiliated Hospital of Harbin Medical University, No. 246 Xuefu Road, Harbin, 150086 Heilongjiang China
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Gao F, Chen C, Lyu J, Zheng J, Ma XC, Yuan XY, Huo K, Han JF. Association between platelet distribution width and poor outcome of acute ischemic stroke after intravenous thrombolysis. Neuropsychiatr Dis Treat 2018; 14:2233-2239. [PMID: 30214213 PMCID: PMC6126482 DOI: 10.2147/ndt.s170823] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
PURPOSE The platelet distribution width (PDW) reflects the status of platelet activity and may be useful for early predictions of the clinical outcome of stroke patients. The purpose of the study was to determine the associations between PDW and clinical outcomes after intravenous thrombolysis in stroke patients. PATIENTS AND METHODS Acute ischemic stroke patients who received intravenous treatment with recombinant tissue-type plasminogen activator were selected for inclusion in the retrospective cohort of this study. The relations between PDW at admission and clinical outcomes were analyzed, including a poor outcome as assessed using the modified Rankin Scale at 3 months, early neurological improvement, and any hemorrhage. The effect of PDW at admission on a poor outcome at 3 months was analyzed using a multivariable logistic regression model with adjustment for potential confounders. The optimal PDW cutoff for predicting poor outcome at 3 months was determined by analyzing the receiver operating characteristics curve. RESULTS PDW was significantly higher for a good outcome than a poor outcome (p=0.005), with median (interquartile range) values of 16.2 (13.2-17.2) and 13.6 (12.5-15.9), respectively. PDW was also higher in patients with early neurological improvement than in patients without improvement (p=0.020) and did not differ between hemorrhage and nonhemorrhage patients. The association between PDW <16.05% and poor outcome remained in a multivariable logistic regression analysis, with an OR of 6.68 and a 95% CI of 1.69-26.49 (p=0.007). CONCLUSION Results suggest a novel hypothesis that a lower PDW may be related with a poor outcome at 3 months after intravenous thrombolysis in acute ischemic stroke patients.
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Affiliation(s)
- Fan Gao
- Clinical Research Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China
| | - Chen Chen
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China,
| | - Jun Lyu
- Clinical Research Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China
| | - Jie Zheng
- Clinical Research Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China
| | - Xian-Cang Ma
- Clinical Research Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China.,Department of Psychiatry, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China
| | - Xing-Yun Yuan
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China,
| | - Kang Huo
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China,
| | - Jian-Feng Han
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China,
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Han JF, Qiu Y, Yu JY, Wang HJ, Deng YQ, Li XF, Zhao H, Sun HX, Qin CF. Immunization with truncated envelope protein of Zika virus induces protective immune response in mice. Sci Rep 2017; 7:10047. [PMID: 28855646 PMCID: PMC5577204 DOI: 10.1038/s41598-017-10595-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 08/10/2017] [Indexed: 11/15/2022] Open
Abstract
The global spread of Zika virus (ZIKV) as well as its unexpected link to infant microcephaly have resulted in serious public health concerns. No antiviral drugs against ZIKV is currently available, and vaccine development is of high priority to prepare for potential ZIKV pandemic. In the present study, a truncated E protein with the N-terminal 90% region reserved (E90) from a contemporary ZIKV strain was cloned and expressed in Escherichia coli, purified by a Ni-NTA column, and characterized by Western blotting assays. Immunization with recombinant E90 induced robust ZIKV-specific humoral response in adult BALB/c mice. Passive transfer of the antisera from E90-immunized mice conferred full protection against lethal ZIKV challenge in a neonatal mice model. Our results indicate that recombinant ZIKV E90 described here represents as a promising ZIKV subunit vaccine that deserves further clinical development.
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Affiliation(s)
- Jian-Feng Han
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
| | - Yang Qiu
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, China
| | | | - Hong-Jiang Wang
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
| | - Yong-Qiang Deng
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
| | - Xiao-Feng Li
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
| | - Hui Zhao
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
| | | | - Cheng-Feng Qin
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China.
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, China.
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Gao F, Wang CT, Chen C, Guo X, Yang LH, Ma XC, Han JF. Effect of Hypokalemia on Functional Outcome at 3 Months Post-Stroke Among First-Ever Acute Ischemic Stroke Patients. Med Sci Monit 2017; 23:2825-2832. [PMID: 28600907 PMCID: PMC5475375 DOI: 10.12659/msm.902464] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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] [Indexed: 02/01/2023] Open
Abstract
Background Hypokalemia has been confirmed to be a predictor of adverse cardiovascular and renal outcomes. There is a paucity of studies focusing on the potential connection between the serum K+ level and the outcome after acute ischemic stroke (AIS). This study investigated whether hypokalemia in the acute stroke stage contributes to worse functional outcome in AIS patients. Material/Methods This retrospective cohort study included consecutive patients with first-ever AIS admitted between June 2015 and March 2016. Patients were divided into 2 groups: hypokalemia (K+ <3.5 mmol/L) and normokalemia (3.5 mmol/L ≤K+ ≤5.5 mmol/L). Primary outcome measure was poor outcome at 3 months (modified Rankin scale >2). Univariate and multivariate logistic regression analyses were used to assess the association between hypokalemia and poor outcome. Receiver operating curve (ROC) analysis was performed to determine the optimal cutoff point of serum K+ level for predicting poor outcome. Results The percent of patients with poor outcome at 3 months was higher in the hypokalemic group (62.9%) than in the normokalemic group (45.5%). Hypokalemic patients tended to have lower fasting glucose at admission, lower Glasgow coma scale score, and longer time from symptom onset to treatment compared with normokalemic patients. Hypokalemia was associated with poor outcome at 3 months after adjusting for potential confounders (odds ratio=2.42, 95% confidence interval=1.21–4.86, P=0.013). ROC analysis showed that the optimal threshold for serum K+ level was 3.7 mmol/L. Conclusions Hypokalemia at the initial admission is associated with poor prognosis at 3 months in first-ever AIS patients.
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Affiliation(s)
- Fan Gao
- Clinical Research Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China (mainland)
| | - Cheng-Tai Wang
- Department of Neurology, Baoji City Chinese Medicine Hospital, Baoji, Shaanxi, China (mainland)
| | - Chen Chen
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China (mainland)
| | - Xing Guo
- Department of Pharmacy, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, China (mainland)
| | - Li-Hong Yang
- Clinical Research Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China (mainland)
| | - Xian-Cang Ma
- Clinical Research Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China (mainland).,Department of Psychiatry, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China (mainland)
| | - Jian-Feng Han
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China (mainland)
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Gao F, Chen C, Lu J, Zheng J, Ma XC, Yuan XY, Huo K, Han JF. De Ritis ratio (AST/ALT) as an independent predictor of poor outcome in patients with acute ischemic stroke. Neuropsychiatr Dis Treat 2017; 13:1551-1557. [PMID: 28670124 PMCID: PMC5478276 DOI: 10.2147/ndt.s139316] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
PURPOSE The aspartate transaminase/alanine transaminase ratio (De Ritis ratio, AAR) was reported to be associated with patients' prognosis in certain diseases recently. The objective of the current study was to determine the association between the AAR at admission and poor outcome at 3 months in acute ischemic stroke (AIS) patients. PATIENTS AND METHODS This retrospective cohort study included patients who experienced their first-ever AIS between June 2015 and March 2016. The primary outcome measure was a poor outcome at 3 months (modified Rankin Scale score >2). Multivariate logistic regression models were used to assess the relationship between AAR quartiles and clinical outcomes among the AIS patients. Receiver operating characteristic curve analysis was applied to identify the optimal cutoff for AAR in predicting the prognosis of AIS. RESULTS In terms of the relationship between poor outcome and AAR, the adjusted odds ratio comparing the highest and lowest AAR quartiles was 2.15 (95% confidence interval =1.14-4.05). An AAR of 1.53 was identified as the optimal cutoff. In a prespecified subgroup analysis according to the time from symptom onset to treatment (>24 vs ≤24 hours), there was no significant difference in the effect of AAR >1.53 between the two groups. CONCLUSION An increased AAR at admission is significantly associated with a poor outcome at 3 months in AIS patients.
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Affiliation(s)
| | | | | | | | - Xian-Cang Ma
- Clinical Research Center.,Department of Psychiatry, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
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Liu D, Han JF, Chen ZY, Bai LX, Zhou JX. The gas density measurement of one long distance supersonic molecular beam. Rev Sci Instrum 2016; 87:123504. [PMID: 28040943 DOI: 10.1063/1.4971303] [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] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The gas density of the supersonic molecular beam (SMB) is a crucial parameter for the fueling or diagnostic process in the tokamak experiments. Using the microphone, one improved method of gas density measurement is proposed, which can greatly improve the measurement capacity by about 3 orders of magnitude by studying the pulsed signal characteristic of the microphone when it is pushed by the SMB. The gas density of the SMB is measured within the axial range of 20-2000 mm, and the axial central density at 2000 mm is about 100 times less than that at 20 mm. It is also found that the radial density distribution follows the Gaussian function in both free expansion (where the SMB can expand freely without any influence from the vacuum chamber) and restricted expansion (where the expansion of the SMB is restricted inside the flight tube of the vacuum system). And the axial central density decreases with the axial distance, which follows the inverse square law in the free expansion, but it deviates from this law in the restricted expansion.
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Affiliation(s)
- D Liu
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, College of Physical Science and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
| | - J F Han
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, College of Physical Science and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
| | - Z Y Chen
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, College of Physical Science and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
| | - L X Bai
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, College of Physical Science and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
| | - J X Zhou
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, College of Physical Science and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
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Ye Q, Liu ZY, Han JF, Jiang T, Li XF, Qin CF. Genomic characterization and phylogenetic analysis of Zika virus circulating in the Americas. Infect Genet Evol 2016; 43:43-9. [PMID: 27156653 DOI: 10.1016/j.meegid.2016.05.004] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 05/02/2016] [Accepted: 05/03/2016] [Indexed: 02/04/2023]
Abstract
The rapid spread and potential link with birth defects have made Zika virus (ZIKV) a global public health problem. The virus was discovered 70years ago, yet the knowledge about its genomic structure and the genetic variations associated with current ZIKV explosive epidemics remains not fully understood. In this review, the genome organization, especially conserved terminal structures of ZIKV genome were characterized and compared with other mosquito-borne flaviviruses. It is suggested that major viral proteins of ZIKV share high structural and functional similarity with other known flaviviruses as shown by sequence comparison and prediction of functional motifs in viral proteins. Phylogenetic analysis demonstrated that all ZIKV strains circulating in the America form a unique clade within the Asian lineage. Furthermore, we identified a series of conserved amino acid residues that differentiate the Asian strains including the current circulating American strains from the ancient African strains. Overall, our findings provide an overview of ZIKV genome characterization and evolutionary dynamics in the Americas and point out critical clues for future virological and epidemiological studies.
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Affiliation(s)
- Qing Ye
- Department of Virology, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Zhong-Yu Liu
- Department of Virology, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Jian-Feng Han
- Department of Virology, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Tao Jiang
- Department of Virology, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China; State Key Laboratory of Pathogen and Biosecurity, Beijing 100071, China
| | - Xiao-Feng Li
- Department of Virology, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China; State Key Laboratory of Pathogen and Biosecurity, Beijing 100071, China
| | - Cheng-Feng Qin
- Department of Virology, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China; State Key Laboratory of Pathogen and Biosecurity, Beijing 100071, China.
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Han JF, Jiang T, Ye Q, Li XF, Liu ZY, Qin CF. Homologous recombination of Zika viruses in the Americas. J Infect 2016; 73:87-8. [PMID: 27105655 DOI: 10.1016/j.jinf.2016.04.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 04/12/2016] [Indexed: 10/21/2022]
Affiliation(s)
- Jian-Feng Han
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Tao Jiang
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Qing Ye
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Xiao-Feng Li
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Zhong-Yu Liu
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Cheng-Feng Qin
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China.
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Deng YQ, Ma J, Xu LJ, Li YX, Zhao H, Han JF, Tao J, Li XF, Zhu SY, Qin ED, Qin CF. Generation and characterization of a protective mouse monoclonal antibody against human enterovirus 71. Appl Microbiol Biotechnol 2015; 99:7663-71. [DOI: 10.1007/s00253-015-6652-8] [Citation(s) in RCA: 10] [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] [Received: 03/26/2015] [Revised: 04/23/2015] [Accepted: 04/26/2015] [Indexed: 11/24/2022]
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Lyu K, Wang GC, He YL, Han JF, Ye Q, Qin CF, Chen R. Crystal structures of enterovirus 71 (EV71) recombinant virus particles provide insights into vaccine design. J Biol Chem 2014; 290:3198-208. [PMID: 25492868 DOI: 10.1074/jbc.m114.624536] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Hand-foot-and-mouth disease (HFMD) remains a major health concern in the Asia-Pacific regions, and its major causative agents include human enterovirus 71 (EV71) and coxsackievirus A16. A desirable vaccine against HFMD would be multivalent and able to elicit protective responses against multiple HFMD causative agents. Previously, we have demonstrated that a thermostable recombinant EV71 vaccine candidate can be produced by the insertion of a foreign peptide into the BC loop of VP1 without affecting viral replication. Here we present crystal structures of two different naturally occurring empty particles, one from a clinical C4 strain EV71 and the other from its recombinant virus containing an insertion in the VP1 BC loop. Crystal structure analysis demonstrated that the inserted foreign peptide is well exposed on the particle surface without significant structural changes in the capsid. Importantly, such insertions do not seem to affect the virus uncoating process as illustrated by the conformational similarity between an uncoating intermediate of another recombinant virus and that of EV71. Especially, at least 18 residues from the N terminus of VP1 are transiently externalized. Altogether, our study provides insights into vaccine development against HFMD.
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Affiliation(s)
- Ke Lyu
- From the Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200031, China
| | - Guang-Chuan Wang
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China, and Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou 310027, China
| | - Ya-Ling He
- From the Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200031, China
| | - Jian-Feng Han
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China, and
| | - Qing Ye
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China, and
| | - Cheng-Feng Qin
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China, and
| | - Rong Chen
- From the Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200031, China,
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Han JF, Zhang Y, Hou PQ, Zhu SY, Wu XY, Zhao H, Yu M, Qin CF. Human enterovirus co-infection in severe HFMD patients in China. J Clin Virol 2014; 61:621-2. [PMID: 25449173 DOI: 10.1016/j.jcv.2014.09.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 09/04/2014] [Accepted: 09/14/2014] [Indexed: 10/24/2022]
Affiliation(s)
- Jian-Feng Han
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yu Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Pei Qiang Hou
- Tai'an Center for Diseases Control and Prevention, Tai'an, China
| | - Shun-Ya Zhu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Xiao-Yan Wu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Hui Zhao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Man Yu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Cheng-Feng Qin
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China.
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Li YX, Zhao H, Cao RY, Deng YQ, Han JF, Zhu SY, Ma J, Liu L, Qin ED, Qin CF. Recombinant tandem multi-linear neutralizing epitopes of human enterovirus 71 elicited protective immunity in mice. Virol J 2014; 11:79. [PMID: 24885030 PMCID: PMC4030048 DOI: 10.1186/1743-422x-11-79] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 04/30/2014] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Human Enterovirus 71 (EV71) has emerged as the leading cause of viral encephalitis in children, especially in the Asia-Pacific regions. EV71 vaccine development is of high priority at present, and neutralization antibodies have been documented to play critical roles during in vitro and in vivo protection against EV71 infection. RESULTS In this study, a novel strategy to produce EV71 vaccine candidate based on recombinant multiple tandem linear neutralizing epitopes (mTLNE) was proposed. The three well identified EV71 linear neutralizing epitopes in capsid proteins, VP1-SP55, VP1-SP70 and VP2-SP28, were sequentially linked by a Gly-Ser linker ((G4S)3), and expressed in E.coli in fusion with the Trx and His tag at either terminal. The recombinant protein mTLNE was soluble and could be purified by standard affinity chromatography. Following three dosage of immunization in adult mice, EV71-specific IgG and neutralization antibodies were readily induced by recombinant mTLNE. IgG subtyping demonstrated that lgG1 antibodies dominated the mTLNE-induced humoral immune response. Especially, cytokine profiling in spleen cells from the mTLNE-immunized mice revealed high production of IL-4 and IL-6. Finally, in vivo challenge experiments showed that passive transfer with anti-mTLNE sera conferred full protection against lethal EV71 challenge in neonatal mice. CONCLUSION Our results demonstrated that this rational designed recombinant mTLNE might have the potential to be further developed as an EV71 vaccine in the future.
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MESH Headings
- Animals
- Antibodies, Viral/blood
- Capsid Proteins/genetics
- Capsid Proteins/immunology
- Chromatography, Affinity
- Cytokines/analysis
- Disease Models, Animal
- Enterovirus A, Human/immunology
- Enterovirus Infections/immunology
- Enterovirus Infections/prevention & control
- Epitopes, B-Lymphocyte/immunology
- Escherichia coli/genetics
- Female
- Gene Expression
- Immunization, Passive
- Immunoglobulin G/blood
- Leukocytes, Mononuclear/immunology
- Mice, Inbred BALB C
- Recombinant Fusion Proteins/genetics
- Recombinant Fusion Proteins/immunology
- Survival Analysis
- Vaccination/methods
- Vaccines, Synthetic/administration & dosage
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/immunology
- Viral Vaccines/administration & dosage
- Viral Vaccines/genetics
- Viral Vaccines/immunology
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Affiliation(s)
- Yue-Xiang Li
- Graduate School, Anhui Medical University, Hefei 230032, Anhui, China
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Hui Zhao
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Rui-Yuan Cao
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yong-Qiang Deng
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Jian-Feng Han
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Shun-Ya Zhu
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Jie Ma
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Long Liu
- Graduate School, Anhui Medical University, Hefei 230032, Anhui, China
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - E-De Qin
- Graduate School, Anhui Medical University, Hefei 230032, Anhui, China
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Cheng-Feng Qin
- Graduate School, Anhui Medical University, Hefei 230032, Anhui, China
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
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14
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Xu LJ, Jiang T, Zhao W, Han JF, Liu J, Deng YQ, Zhu SY, Li YX, Nian QG, Zhang Y, Wu XY, Qin ED, Qin CF. Parallel mRNA and microRNA profiling of HEV71-infected human neuroblastoma cells reveal the up-regulation of miR-1246 in association with DLG3 repression. PLoS One 2014; 9:e95272. [PMID: 24739954 PMCID: PMC3989279 DOI: 10.1371/journal.pone.0095272] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 03/26/2014] [Indexed: 11/19/2022] Open
Abstract
Human enterovirus 71 (HEV71) has emerged as the leading cause of viral encephalitis in children in most Asian countries. The roles of host miRNAs in the neurological pathogenesis of HEV71 infection remain unknown. In the present study, comprehensive miRNA expression profiling in HEV71-infected human neuroblastoma SH-SY5Y cells was performed using the Affymetrix Gene Chip microarray assay and was validated using real-time RT-PCR. Among the 69 differentially expressed miRNAs, miR-1246 was specifically induced by HEV71 infection in human neuroblastoma cells, but inhibition of miR-1246 failed to affect HEV71 replication. Parallel mRNA and microRNA profiling based on the 35 K Human Genome Array identified 182 differentially regulated genes. Target prediction of miR-1246 and network modeling revealed 14 potential target genes involved in cell death and cell signaling. Finally, a combined analysis of the results from mRNA profiling and miR-1246 target predication led to the identification of disc-large homolog 3 (DLG3), which is associated with neurological disorders, for further validation. Sequence alignment and luciferase reporter assay showed that miR-1246 directly bound with the 3′-UTR of DLG3 gene. Down-regulation of miR-1246 induced significant changes in DLG3 expression levels in HEV71-infected SHSY5Y cells. Together, these results suggested that miR-1246 might play a role in neurological pathogenesis of HEV71 by regulating DLG3 gene in infected cells. These findings provide new information on the miRNA and mRNA profiles of HEV71-infected neuroblastoma cells. The biological significance of miR-1246 and DLG3 during the course of HEV71 infection deserves further investigation.
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Affiliation(s)
- Li-Juan Xu
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
- PLA 404 Hospital, Weihai, Shandong, China
| | - Tao Jiang
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Wei Zhao
- School of Public Health and Tropical Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Jian-Feng Han
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Juan Liu
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yong-Qiang Deng
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Shun-Ya Zhu
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yue-Xiang Li
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
- Graduate School, Anhui Medical University, Hefei, Anhui, China
| | - Qing-Gong Nian
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yu Zhang
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Xiao-Yan Wu
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - E-De Qin
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Cheng-Feng Qin
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
- Graduate School, Anhui Medical University, Hefei, Anhui, China
- * E-mail:
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15
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Han JF, Xu S, Zhang Y, Zhu SY, Wu DL, Yang XD, Liu H, Sun BX, Wu XY, Qin CF. Hand, foot, and mouth disease outbreak caused by coxsackievirus A6, China, 2013. J Infect 2014; 69:303-5. [PMID: 24704297 DOI: 10.1016/j.jinf.2014.03.015] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 03/25/2014] [Indexed: 11/17/2022]
Affiliation(s)
- Jian-Feng Han
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China.
| | - Shuang Xu
- Jilin Provincial Center for Diseases Control and Prevention, Changchun, People's Republic of China
| | - Yu Zhang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Shun-Ya Zhu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Dong-Lin Wu
- Jilin Provincial Center for Diseases Control and Prevention, Changchun, People's Republic of China
| | - Xian-Da Yang
- Jilin Provincial Center for Diseases Control and Prevention, Changchun, People's Republic of China
| | - Hong Liu
- Changchun Center for Diseases Control and Prevention, Changchun, People's Republic of China
| | - Bing-Xin Sun
- Changchun Center for Diseases Control and Prevention, Changchun, People's Republic of China
| | - Xiao-Yan Wu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China
| | - Cheng-Feng Qin
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People's Republic of China.
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16
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Han JF, Yu N, Pan YX, He SJ, Xu LJ, Cao RY, Li YX, Zhu SY, Zhang Y, Qin ED, Che XY, Qin CF. Phenotypic and genomic characterization of human coxsackievirus A16 strains with distinct virulence in mice. Virus Res 2013; 179:212-9. [PMID: 24211607 DOI: 10.1016/j.virusres.2013.10.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 10/21/2013] [Accepted: 10/22/2013] [Indexed: 01/18/2023]
Abstract
Human coxsackievirus A16 (CA16) infection results in hand, foot, and mouth disease (HFMD) along with other severe neurological diseases in children and poses an important public health threat in Asian countries. During an HFMD epidemic in 2009 in Guangdong, China, two CA16 strains (GD09/119 and GD09/24) were isolated and characterized. Although both strains were similar in plaque morphology and growth properties in vitro, the two isolates exhibited distinct pathogenicity in neonatal mice upon intraperitoneal or intracranial injection. Complete genome sequences of both CA16 strains were determined, and the possible virulence determinants were analyzed and predicted. Phylogenetic analysis revealed that these CA16 isolates from Guangdong belonged to the B1b genotype and were closely related to other recent CA16 strains isolated in mainland China. Similarity and bootscanning analyses of these CA16 strains detected homologous recombination with the EV71 prototype strain BrCr in the non-structural gene regions and the 3'-untranslated regions. Together, the phenotypic and genomic characterizations of the two clinical CA16 isolates circulating in China were compared in detail, and the potential amino acid residues responsible for CA16 virulence in mice were predicted. These findings will help explain the evolutionary relationship of the CA16 strains circulating in China, warranting future studies investigating enterovirus virulence.
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Affiliation(s)
- Jian-Feng Han
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Nan Yu
- Laboratory of Emerging Infectious Disease and Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, No. 253 Gong ye da dao zhong, Guangzhou, Guangdong 510282, China
| | - Yu-Xian Pan
- Laboratory of Emerging Infectious Disease and Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, No. 253 Gong ye da dao zhong, Guangzhou, Guangdong 510282, China
| | - Si-Jie He
- Laboratory of Emerging Infectious Disease and Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, No. 253 Gong ye da dao zhong, Guangzhou, Guangdong 510282, China
| | - Li-Juan Xu
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Rui-Yuan Cao
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Yue-Xiang Li
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Shun-Ya Zhu
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Yu Zhang
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - E-De Qin
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Xiao-Yan Che
- Laboratory of Emerging Infectious Disease and Division of Laboratory Medicine, Zhujiang Hospital, Southern Medical University, No. 253 Gong ye da dao zhong, Guangzhou, Guangdong 510282, China
| | - Cheng-Feng Qin
- Department of Virology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China.
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17
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Zhao H, Li HY, Han JF, Deng YQ, Li YX, Zhu SY, He YL, Qin ED, Chen R, Qin CF. Virus-like particles produced in Saccharomyces cerevisiae elicit protective immunity against Coxsackievirus A16 in mice. Appl Microbiol Biotechnol 2013; 97:10445-52. [DOI: 10.1007/s00253-013-5257-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 09/09/2013] [Accepted: 09/11/2013] [Indexed: 10/26/2022]
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18
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He SJ, Han JF, Ding XX, Wang YD, Qin CF. Characterization of enterovirus 71 and coxsackievirus A16 isolated in hand, foot, and mouth disease patients in Guangdong, 2010. Int J Infect Dis 2013; 17:e1025-30. [PMID: 23791223 DOI: 10.1016/j.ijid.2013.04.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 03/12/2013] [Accepted: 04/14/2013] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Hand, foot, and mouth disease (HFMD) is an acute viral disease caused by human enteroviruses, especially human enterovirus 71 (HEV71) and coxsackievirus A16 (CVA16), and mainly affects infants and young children. After the outbreak in 2008 in Fuyang, China, HFMD was classified as a category C notifiable infectious disease by the Ministry of Health of China. METHODS In this study, we report the epidemiologic and clinical manifestations of HFMD in Guangdong Province, China in 2010, and characterize HEV71 and CVA16 isolated from clinical specimens. RESULTS Among the 542 HFMD patients, 495 (91.3%) were positive for enterovirus as detected by real-time reverse transcriptase PCR; 243 were positive for HEV71 (49.1%, 243/495) and 114 were positive for CVA16 (23.0%, 114/495). Most of the affected children were aged 5 years or under (93.7%, 508/542). Phylogenetic analyses of VP1 gene sequences showed that the HEV71 isolates belonged to C4a subgenotype, and CVA16 isolates belonged to B1 genotype. CONCLUSIONS Our results demonstrate that HEV71 and CVA16 are the primary causative agents responsible for HFMD in Guangdong Province, and their co-circulation poses a potential risk to public health.
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Affiliation(s)
- Si-Jie He
- Center for Clinical Laboratory, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
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19
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Li HY, Han JF, Qin CF, Chen R. Virus-like particles for enterovirus 71 produced from Saccharomyces cerevisiae potently elicits protective immune responses in mice. Vaccine 2013; 31:3281-7. [PMID: 23726823 DOI: 10.1016/j.vaccine.2013.05.019] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 04/01/2013] [Accepted: 05/08/2013] [Indexed: 01/30/2023]
Abstract
Human Enterovirus 71 (EV71) is recognized as the leading causative agent of hand-foot-and-mouth disease (HFMD) in the Asia-Pacific region in recent years. There are still no approved antiviral drugs or vaccines against EV71 infection yet. In this study, we have developed an advanced platform for production of the virus-like particles (VLPs) for EV71 in Saccharomyces Cerevisiae by co-expressing P1 and 3CD genes of EV71. These VLPs exhibited similar morphology and protein composition as EV71 empty particles produced from EV71-infected cells. Immunization with VLPs in mice elicited robust neutralization antibodies against EV71 and potent cellular immune response. In vivo challenge experiments showed that the immune sera induced by VLP conferred protection in neonate mice against lethal EV71 challenge. Together, our study indicated that VLP from yeast is another potential vaccine candidate against EV71 infection.
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Affiliation(s)
- Hao-Yang Li
- Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai 200025, China
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20
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Lomas AJ, Webb WR, Han J, Chen GQ, Sun X, Zhang Z, El Haj AJ, Forsyth NR. Poly (3-hydroxybutyrate-co-3-hydroxyhexanoate)/collagen hybrid scaffolds for tissue engineering applications. Tissue Eng Part C Methods 2013; 19:577-85. [PMID: 23281705 DOI: 10.1089/ten.tec.2012.0457] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The benefits associated with polyhydroxyalkanoates (PHA) in tissue engineering include high immunotolerance, low toxicity, and biodegradability. Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx), a molecule from the PHA family of biopolymers, shares these features. In this study, the applicability of human embryonic stem cells (hESCs), spontaneously differentiated hESCs (SDhESCs), and mesenchymal stem cells (hMSCs) in conjunction with PHBHHx and collagen as a biocompatible replacement strategy for damaged tissues was exploited. Collagen gel contraction was monitored by seeding cells at controlled densities (0, 10(3), 10(4), and 10(5) cells/mL) and measuring length and diameter at regular time intervals thereafter when cultured in a complete medium. Cell viability was measured by trypan blue exclusion assay. Porous PHBHHx tube scaffolds were prepared using a dipping method followed by salt leaching. PHBHHx/collagen composites were generated via syringe injection of collagen/cell mixtures into sterile PHBHHx porous tubes. Reverse transcription polymerase chain reaction was used to determine the fate of cells within PHBHHx/collagen scaffolds with tendon, bone, cartilage, and fat-linked transcript expression being explored at days 0, 5 10, and 20. The capacity of PHBHHx/collagen scaffolds to support differentiation was explored using a medium specific for osteogenic, chondrogenic, and adipogenic lineage generation. Collagen gel tube contraction required initial seeding densities of ≥10(5) hMSCs or SDhESCs in 1.5 mg/mL collagen gel tubes. Gels with a collagen concentration of 3 mg/mL did not display contraction across the examined cell seeding densities. Cell viability was ∼50% for SDhESC and 90% for hMSCs at all cell densities tested in porous PHBHHx tube/3 mg/mL collagen hybrid scaffolds after 20 days in vitro culture. Undifferentiated hESCs did not contract collagen gel tubes and were unviable after 20 days culture. In the absence of additional stimuli, SOX9 was sporadically found, while RUNX2 was not present in both hMSC and SDhESC. Hybrid scaffolds were shown to promote retention of osteogenic, chondrogenic, and adipogenic differentiation by expression of RUNX2, SOX9, and PPARγ genes, respectively, following exposure to the appropriate induction medium. PHBHHx/collagen scaffolds have been successfully used to culture hMSC and SDhESC over an extended period supporting the potential of this scaffold combination in future tissue engineering applications.
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Affiliation(s)
- Alex J Lomas
- Institute for Science and Technology in Medicine, Keele University, Guy Hilton Research Centre, Stoke-on-Trent, United Kingdom
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21
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Han JF, Jiang T, Fan XL, Yang LM, Yu M, Cao RY, Wang JZ, Qin ED, Qin CF. Recombination of human coxsackievirus B5 in hand, foot, and mouth disease patients, China. Emerg Infect Dis 2012; 18:351-3. [PMID: 22305307 PMCID: PMC3310474 DOI: 10.3201/eid1802.111524] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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22
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Cao RY, Han JF, Jiang T, Tian X, Yu M, Deng YQ, Qin ED, Qin CF. In vitro and in vivo characterization of a new enterovirus type 71-specific human intravenous immunoglobulin manufactured from selected plasma donors. J Clin Virol 2011; 51:246-9. [DOI: 10.1016/j.jcv.2011.05.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 04/13/2011] [Accepted: 05/03/2011] [Indexed: 10/18/2022]
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23
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Han JF, Cao RY, Jiang T, Yu M, Liu W, Tian X, Qin ED, Cao WC, Qin CF. Echovirus 30 in EV71-associated hand, foot and mouth disease outbreak, Guangxi, China. J Clin Virol 2011; 50:348-9. [DOI: 10.1016/j.jcv.2011.01.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Accepted: 01/05/2011] [Indexed: 10/18/2022]
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24
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Han JF, Cao RY, Deng YQ, Tian X, Jiang T, Qin ED, Qin CF. Antibody dependent enhancement infection of enterovirus 71 in vitro and in vivo. Virol J 2011; 8:106. [PMID: 21385398 PMCID: PMC3060144 DOI: 10.1186/1743-422x-8-106] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [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: 10/25/2010] [Accepted: 03/08/2011] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Human enterovirus 71 (EV71) has emerged as a significant cause of acute encephalitis and deaths in young children. The clinical manifestations caused by EV71 varied from mild hand, foot and mouth disease to severe neurological complications and deaths, but its pathogenesis remains elusive. Antibody dependent enhancement (ADE) infection has been reported in various viruses and has been shown to contribute to disease severity. RESULTS In this study, the presence of sub-neutralizing antibody was demonstrated to enhance EV71 infection in THP-1 cells and increase the mortality of EV71 infection in a suckling mouse model. Further, a secondary infection model was established to characterize the correlation between ADE and disease severity, and primary asymptomatic EV71 infection was shown to increase the mortality of the secondary EV71 infection in suckling mice. CONCLUSIONS Together, these in vitro and in vivo experiments strongly supported the hypothesis of ADE infection of EV71. The present findings indicate ADE might contribute to the pathogenesis of severe EV71 infection, and raise practical issues of vaccine development and antibody-based therapy.
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Affiliation(s)
- Jian-Feng Han
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, PR China
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25
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Abstract
BACKGROUND Enterovirus 71 (EV71) is an etiologic agent of hand-foot-and-mouth disease (HFMD), and recent HFMD epidemics worldwide have been associated with a severe form of brainstem encephalitis associated with pulmonary edema and high case-fatality rates. EV71 contains a positive-sense single-stranded genome RNA of approximately 7400 bp in length which encodes a polyprotein with a single open reading frame (ORF), which is flanked by untranslated regions at both the 5' and 3' ends. RESULTS A long distance RT-PCR assay was developed to amplify the full length genome cDNA of EV71 by using specific primes carrying a SP6 promoter. Then the in vitro synthesized RNA transcripts from the RT-PCR amplicons were then transfected into RD cells to produce the rescued virus. The rescued virus was further characterized by RT-PCR and indirect fluorescent-antibody (IFA) assay in comparison with the wild type virus. The rescued viruses were infectious on RD cells and neurovirulent when intracerebrally injected into suckling mice. CONCLUSIONS Thus, we established a rapid method to produce the infectious full length cDNA of EV71 directly from RNA preparations and specific mutations can be easily engineered into the rescued enterovirus genome by this method.
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Affiliation(s)
- Jian-Feng Han
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, PR China
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26
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Zong ZP, Matsui S, Han JF, Katsuda S, Fu ML. Involvement of thymus in amiodarone-treated autoimmune myocarditis in rats. Int J Cardiol 2008; 125:122-9. [PMID: 17442434 DOI: 10.1016/j.ijcard.2007.01.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2006] [Accepted: 01/01/2007] [Indexed: 01/01/2023]
Abstract
We previously showed that amiodarone, an iodine-rich benzofuranic derivative, interferes with the progression of myocarditis using a rat model of experimental autoimmune myocarditis. Further studies have also revealed that intraperitoneal treatment with 12.5 mg/kg amiodarone, which is below the range of its therapeutic plasma concentration, also effectively interferes with the progression of myocarditis using the same model. The relationship between myocarditis and the thymus has not been studied in either patients or animal models. To investigate whether the thymus is involved in the effect of amiodarone on experimental autoimmune myocarditis, we examined its phenotypic distribution in thymocytes and peripheral blood lymphocytes using flow cytometry. We found no significant differences in the proportions of CD4(+) and CD8(+) T cells and the CD4(+)/CD8(+) T cell ratio in the control group compared with amiodarone-treated group. However, amiodarone-treated group induced a decrease in the proportion of CD4(+)TNF(+) and CD4(+)IL-4(+) T cells and an increase in CD4(+)IFN(+) T cells, resulting in a significant reduction of the CD4(+)TNF(+)/CD4(+)IFN(+) and CD4(+)IL-4(+)/CD4(+)IFN(+) T cell ratios. These results suggest for the first time that the thymus is actively involved when myocarditis is treated with amiodarone.
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Han JF, Ning YB, Song L, Yang CH. [Research of real-time fluorescent PCR in the rapid differential detection of H5, H9, H7 subtype avian influenza inactivated vaccines]. Sheng Wu Gong Cheng Xue Bao 2007; 23:953-957. [PMID: 18051881] [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: 05/25/2023]
Abstract
Specific primers and TaqMan MGB probes were designed with Primer Express 2.0 software according to the conserved region of the H5, H9, H7 subtype AIV hemagglutinin gene to make research of real-time fluorescent one-step PCR in the differential detection of H5, H9, H7 subtype avian influenza inactivated vaccines. The result showed that the method was specific and reproducible. No cross-reaction was discovered with other avian disease vaccines. Real-time fluorescent PCR provided a specific, sensitive, rapid and convenient method for the subtype identification of avian influenza inactivated vaccines.
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Affiliation(s)
- Jian-Feng Han
- Key Laboratory of Veterinary Drug Innovation and Biosafety Evaluation, Ministry of Agriculture, China Institute of Veterinary Drug Control, Beijing 100081, China
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Abstract
Amiodarone, a promising drug for the treatment of tachyarrythmias, was recently found to have immunomodulatory effects in vitro. We hypothesized that amiodarone would affect the immune system in vivo and examined the effect of amiodarone on myocarditis in rats. We induced experimental autoimmune myocarditis in rats by cardiac myosin immunization and treated the animals with an intraperitoneal injection of amiodarone at 25 mg/kg/every other day, 10 times after the induction of experimental autoimmune myocarditis. In the treated group, both microscopic and macroscopic examinations showed reduced heart weights, a mild and localized infiltration of inflammatory cells and fibrosis in the myocardium, and a mild congestion in the liver and lungs as compared with the control group. The phenotypic distribution of lymphocytes in peripheral blood showed a significant decrease in the CD4/CD8a ratio in the treated group, but not in the control group. The proportion of mast cells involved in inflammatory cell infiltration was lower in the treated group than the control group. In vitro, amiodarone inhibited the proliferation of mast cells by arresting them in the G2 phase of the cell cycle. These results indicated that amiodarone minimized the progression of experimental autoimmune myocarditis, suggesting a potential therapeutic role for amiodarone treatment in patients suffering from myocarditis, especially myocarditis complicated by cardiac arrhythmias. One possible mechanism by which amiodarone minimizes the progression of experimental autoimmune myocarditis may be to affect the immune system via the immunomodulatory effects on T cell and mast cell functions.
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Affiliation(s)
- Shinobu Matsui
- Department of Cardiology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
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