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https://www.readbyqxmd.com/read/29337652/poorly-neutralizing-polyclonal-antibody-in-vitro-against-coxsackievirus-a16-circulating-strains-can-prevent-a-lethal-challenge-in-vivo
#1
Xin Yao, QunYing Mao, Yajing Li, Chunsheng Hao, LianLian Bian, Pan Chen, Fan Gao, Xing Wu, WeiWei Lu, Qiang Gao, XiuLing Li, Zhenglun Liang
Neutralizing antibodies (NTAbs) is a major criterion for evaluation the immunogenicity of many vaccines, for example, poliovirus and EV71 vaccine. Here, we firstly discovered that polyclonal antibodies induced by inactivated CVA16 vaccine and lived CVA16 virus have poor ability to neutralize circulating CVA16 strains in vitro. However, the passive transfer of poorly neutralizing polyclonal antibodies can protect suckling mice from lethally challenged with circulating strains in vivo. In addition, the obvious dose response was found between the titer of antibodies and the survival rate...
January 16, 2018: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29324904/prohibitin-plays-a-critical-role-in-enterovirus-71-neuropathogenesis
#2
Issac Horng Khit Too, Isabelle Bonne, Eng Lee Tan, Justin Jang Hann Chu, Sylvie Alonso
A close relative of poliovirus, enterovirus 71 (EV71) is regarded as an important neurotropic virus of serious public health concern. EV71 causes Hand, Foot and Mouth Disease and has been associated with neurological complications in young children. Our limited understanding of the mechanisms involved in its neuropathogenesis has hampered the development of effective therapeutic options. Here, using a two-dimensional proteomics approach combined with mass spectrometry, we have identified a unique panel of host proteins that were differentially and dynamically modulated during EV71 infection of motor-neuron NSC-34 cells, which are found at the neuromuscular junctions where EV71 is believed to enter the central nervous system...
January 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29298696/enhanced-human-enterovirus-71-infection-by-endocytosis-inhibitors-reveals-multiple-entry-pathways-by-enterovirus-causing-hand-foot-and-mouth-diseases
#3
Meichun Yuan, Jingjing Yan, Jingna Xun, Chong Chen, Yuling Zhang, Min Wang, Wenqi Chu, Zhigang Song, Yunwen Hu, Shuye Zhang, Xiaoyan Zhang
BACKGROUND: Human enterovirus 71 (EV71) was previously known to enter cells through clathrin or caveolar mediated endocytic pathways. However, we observed chlorpromazine (CPZ) or dynasore (DNS), which inhibit clathrin and dynamin mediated endocytosis, did not suppress EV71 cell entry in particular cell types. So the current knowledge of entry mechanisms by EV71 is not complete. METHODS: Viral infection was examined by flow cytometry or end-point dilution assays...
January 3, 2018: Virology Journal
https://www.readbyqxmd.com/read/29282065/pulmonary-edema-following-central-nervous-system-lesions-induced-by-a-non-mouse-adapted-ev71-strain-in-neonatal-balb-c-mice
#4
Yuefei Jin, Chao Zhang, Rongguang Zhang, Jingchao Ren, Shuaiyin Chen, Meili Sui, Guangyuan Zhou, Dejian Dang, Jiehui Zhu, Huifen Feng, Yuanlin Xi, Haiyan Yang, Guangcai Duan
BACKGROUND: Enterovirus (EV) infection has been a serious health issue in Asia-Pacific region. It has been indicated that the occurrence of fatal hand foot and mouth disease (HFMD) cases following EV71 infection is mainly attributed to pulmonary edema. However, the development of pulmonary disorders after EV71 infection remains largely unknown. To establish an EV71-infected animal model and further explore the underlying association of central nervous system (CNS) invasion with pulmonary edema, we isolated a clinical source EV71 strain (ZZ1350) from a severe case in Henan Province...
December 28, 2017: Virology Journal
https://www.readbyqxmd.com/read/29273481/a-novel-and-highly-sensitive-real-time-nested-rt-pcr-assay-in-a-single-closed-tube-for-detection-of-enterovirus
#5
Xin-Xin Shen, Fang-Zhou Qiu, Huai-Long Zhao, Meng-Jie Yang, Liu Hong, Song-Tao Xu, Shuai-Feng Zhou, Gui-Xia Li, Zhi-Shan Feng, Xue-Jun Ma
The sensitivity of qRT-PCR assay is not adequate for the detection of the samples with lower viral load, particularly in the cerebrospinal fluid (CSF) of patients. Here, we present the development of a highly sensitive real-time nested RT-PCR (RTN RT-PCR) assay in a single closed tube for detection of human enterovirus (HEV). The clinical performance of both RTN RT-PCR and qRT-PCR was also tested and compared using 140 CSF and fecal specimens. The sensitivities of RTN RT-PCR assay for EV71, Coxsackievirus A (CVA)16, CVA6 and CVA10 achieved 10-8 dilution with a corresponding Ct value of 38...
December 2, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29238324/immunopathogenesis-and-virus-host-interactions-of-enterovirus-71-in-patients-with-hand-foot-and-mouth-disease
#6
REVIEW
Jonathan A Cox, Julian A Hiscox, Tom Solomon, Mong-How Ooi, Lisa F P Ng
Enterovirus 71 (EV71) is a global infectious disease that affects millions of people. The virus is the main etiological agent for hand, foot, and mouth disease with outbreaks and epidemics being reported globally. Infection can cause severe neurological, cardiac, and respiratory problems in children under the age of 5. Despite on-going efforts, little is known about the pathogenesis of EV71, how the host immune system responds to the virus and the molecular mechanisms behind these responses. Moreover, current animal models remain limited, because they do not recapitulate similar disease patterns and symptoms observed in humans...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29235129/association-of-gene-polymorphisms-of-pattern-recognition-receptor-signalling-pathway-with-the-risk-and-severity-of-hand-foot-and-mouth-disease-caused-by-enterovirus-71-in-chinese-han-population
#7
Ya-Ping Li, Mei Li, Xiao-Li Jia, Hui-Ling Deng, Wen-Jun Wang, Feng-Ping Wu, Jun Wang, Shuang-Suo Dang
Hand, foot and mouth disease (HFMD) caused by enterovirus 71 (EV71) presents with a wide variety of clinical manifestations. Host immune response is a factor that influences disease susceptibility and severity. We investigated the potential association of gene polymorphisms in the pattern recognition receptor (PRR) pathway with the risk and severity of EV71 infection. A total of 180 EV71 HFMD cases (108 severe case; 72 mild cases) were enrolled. A group of 201 sex- and age-matched children was included as a control...
December 12, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/29231065/serum-interleukin-6-levels-as-an-indicator-of-aseptic-meningitis-among-children-with-enterovirus-71-induced-hand-foot-and-mouth-disease
#8
Joo Young Lee, Minji Son, Jin Han Kang, Ui Yoon Choi
OBJECTIVES: The enterovirus EV71 is a major pathogen of hand, foot, and mouth disease (HFMD) in children. Aseptic meningitis is the most common neurologic complication of EV71-induced HFMD. Lumbar puncture is a crucial procedure in the diagnosis of aseptic meningitis. It is often performed based on physicians' clinical suspicion. A diagnostic method that can aid in deciding whether this procedure should be performed is necessary. Cytokines are speculated to be associated with neurologic complications...
December 14, 2017: Postgraduate Medicine
https://www.readbyqxmd.com/read/29227478/a-potentiometric-immunosensor-for-enterovirus-71-based-on-bis-mpa-cooh-dendrimer-doped-agcl-nanospheres-with-a-silver-ion-selective-electrode
#9
Ai-Li Sun
Herein a new potentiometric immunoassay for the point-of-care detection of enterovirus 71 (EV71) was developed by using a silver (Ag+) ion-selective electrode (ISE). Initially, the carboxylated dendrimer-doped AgCl nanospheres were synthesized by the reverse micelle method. Then the synthesized nanospheres were used to label a polyclonal mouse anti-EV71 antibody via a typical carbodiimide coupling method. The immunoreaction was executed on a monoclonal anti-EV71 antibody-coated microplate by using biofunctional AgCl nanospheres as the detection antibody...
December 11, 2017: Analyst
https://www.readbyqxmd.com/read/29216216/epidemiological-and-genetic-characteristics-of-ev71-in-hand-foot-and-mouth-disease-in-guangxi-southern-china-from-2010-to-2015
#10
Minmei Chen, Yu Ju, Min Chen, Zhenguo Xie, Kaijiao Zhou, Yi Tan, Jianjun Mo
Hand, foot, and mouth disease (HFMD) is a significant public health challenge in China. Human enterovirus 71 (EV71) is regarded as the predominant causative pathogen of HFMD. Since 2015, two inactivated EV71 vaccines have been approved in mainland China, and because their use could change the HFMD pathogen spectrum, this should now be monitored. However, the epidemiological and genetic trends of EV71 with respect to HFMD in Guangxi, southern China, are still not clear. In this study, we describe the epidemiological and genetic characterization of this virus in clinically-diagnosed HFMD reported from 2010 to 2015 in Guangxi...
2017: PloS One
https://www.readbyqxmd.com/read/29215585/xanthones-and-quinolones-derivatives-produced-by-the-deep-sea-derived-fungus-penicillium-sp-scsio-ind16f01
#11
Feng-An Liu, Xiuping Lin, Xuefeng Zhou, Minghao Chen, Xiuling Huang, Bin Yang, Huaming Tao
Chemical investigation of the fungus Penicillium sp. SCSIO Ind16F01 derived from deep-sea sediment sample afforded a new xanthone, 3,8-dihydroxy-2-methyl-9-oxoxanthene-4-carboxylic acid methyl ester (1) and a new chromone, coniochaetone J (2), together with three known xanthones, 8-hydroxy-6-methyl-9-oxo-9H-xanthene-1-carboxylic acid methyl ester (3), 7,8-dihydroxy-6-methyl-9-oxo-9H-xanthene-1-carboxylic acid methyl ester (4), 1,6,8-trihydroxy-3-(hydroxymethyl)anthraquinone (5), three known chromones, coniochaetone B (6), citrinolactones B (7), epiremisporine B (8), and four reported rare class of N-methyl quinolone lactams: quinolactacins B (9), C1 (10), and C2 (11), and quinolonimide (12)...
December 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29215055/impairing-the-function-of-mlck-myosin-va-or-myosin-vb-disrupts-rhinovirus-b14-replication
#12
Antonio Real-Hohn, D William Provance, Rafael Braga Gonçalves, Caio Bidueira Denani, Andréa Cheble de Oliveira, Verônica P Salerno, Andre Marco Oliveira Gomes
Together, the three human rhinovirus (RV) species are the most frequent cause of the common cold. Because of their high similarity with other viral species of the genus Enterovirus, within the large family Picornaviridae, studies on RV infectious activities often offer a less pathogenic model for more aggressive enteroviruses, e.g. poliovirus or EV71. Picornaviruses enter via receptor mediated endocytosis and replicate in the cytosol. Most of them depend on functional F-actin, Rab proteins, and probably motor proteins...
December 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29180670/mir-16-5p-mediates-a-positive-feedback-loop-in-ev71-induced-apoptosis-and-suppresses-virus-replication
#13
Caishang Zheng, Zhenhua Zheng, Jianhong Sun, Yuan Zhang, Chunyu Wei, Xianliang Ke, Yan Liu, Li Deng, Hanzhong Wang
Enterovirus 71 (EV71) is the predominant causative pathogen of hand-foot-and-mouth disease (HFMD). Contrary to other HFMD-causing enterovirus, EV71 can lead to severe neurological complications, even death. MicroRNAs (miRNAs) are small non-coding RNAs that constitute the largest family of gene regulators participating in numerous biological or pathological processes. We previously reported that miR-16-5p increases with severity of HFMD by investigating the expression patterns of host miRNAs in patients with HFMD...
November 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29176678/isochlorogenic-acid-c-prevents-enterovirus-71-infection-via-modulating-redox-homeostasis-of-glutathione
#14
Zeyu Cao, Yue Ding, Liang Cao, Gang Ding, Zhenzhong Wang, Wei Xiao
Enterovirus 71 (EV71) is a key pathogen of hand, foot and mouth disease (HFMD) in children under 6 years of age. The antiviral potency of antioxidant isochlorogenic acid C (ICAC) extracted from foods was evaluated in cellular and animal models. First, the cytotoxicity of ICAC on Vero cells was investigated. The viral plaques, cytopathic effects and yield induced by EV71 infection were obviously reduced by ICAC, which was consistent with the investigation of VP1 transcripts and protein expression. Moreover, the mortality, weight loss and limb paralysis of mice caused by EV71 challenge were remarkably relieved by ICAC injection, which was achieved through decreases in the viral load and cytokine secretion in the mouse brain...
November 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29175261/th17-cytokine-profiling-of-colorectal-cancer-patients-with-or-without-enterovirus-71-antigen-expression
#15
Yazhen Li, Qiancheng Qiu, Zhiqiang Fan, Ping He, Huanzhu Chen, Xiaoyang Jiao
OBJECT: Th17 cytokines have been identified in several types of human cancers. In this pilot study, the expression of Th17 cytokines profiling in enteroviruses 71 (EV71) associated colorectal cancer (CRC) were explored. METHODS: 66 patients with CRC were enrolled in this study; immune- histochemical analyses were performed on cancerous tissues and adjacent non- cancerous tissues of the patients. Serum Th17 cytokines of CRC patients and healthy controls were measured using a Luminex 200 analyzer...
November 23, 2017: Cytokine
https://www.readbyqxmd.com/read/29175108/nonstructural-protein-2a-modulates-replication-and-virulence-of-enterovirus-71
#16
Chun Li, Qiao Qiao, Shu-Bin Hao, Zhen Dong, Li Zhao, Jing Ji, Zhi-Yu Wang, Hong-Ling Wen
Enterovirus 71 (EV71) can cause hand, foot, and mouth disease in children, and severe infections can induce neurological complications and even death. However, the pathogenesis of EV71 remains unknown. The 2A proteinase (2Apro) of EV71 plays an important role in segmenting the precursor polyprotein during viral replication, inhibiting host protein synthesis, and evading innate immunity. This study was to determine the function of EV71 2Apro in replication and virulence. A chimeric strain (SDLY 107-2A-1) was recombined by replacing 2Apro of a severe strain (SDLY107) with that of a mild strain (SDLY1) based on an infectious cDNA clone...
November 21, 2017: Virus Research
https://www.readbyqxmd.com/read/29172969/interleukin-35-modulates-the-imbalance-between-regulatory-t-cells-and-t-helper-17-cells-in-enterovirus-71-induced-hand-foot-and-mouth-disease
#17
Qian Huang, Yanhua Wang, Changyun Si, De'an Zhao, Yanping Wang, Yuxiu Duan
Interleukin (IL)-35 modulates the imbalance between regulatory T cells (Tregs) and T helper (Th) 17 cells, which played vital roles in the pathogenesis of autoimmune and infectious diseases. However, the role of Tregs/Th17 cell imbalance and the regulatory functions of IL-35 have remained largely unknown in enterovirus 71 (EV71)-induced hand, foot, and mouth disease (HFMD). In this study, a total of 47 HFMD patients (30 with mild HFMD and 17 with severe HFMD) and 13 healthy individuals were enrolled. The frequencies of CD4+CD25+CD127dim/- Tregs and CD4+IL-17+ Th17 cells, as well as IL-35 expression levels, were measured...
November 27, 2017: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/29165766/clinical-analysis-of-59-children-with-hand-foot-and-mouth-diseases-due-to-enterovirus-ev71-and-concomitant-viral-encephalitis
#18
M-G Wang, H-M Sun, X-M Liu, X-Q Deng
OBJECTIVE: To analyzed the clinical features of children with HFMD and viral encephalitis and to summarize some treatments. PATIENTS AND METHODS: A total of 59 children with HFMD were included in this study. All children underwent complete blood count, blood biochemical test cerebrospinal fluid examination, chest X-ray and brain MRI. RESULTS: One child died 24 hours after admission due to central respiratory failure with myocardial damage...
October 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29156632/neurotropism-in-vitro-and-mouse-models-of-severe-and-mild-infection-with-clinical-strains-of-enterovirus-71
#19
Pin Yu, Linlin Bao, Lili Xu, Fengdi Li, Qi Lv, Wei Deng, Yanfeng Xu, Chuan Qin
Enterovirus 71 (EV71) is a common etiological agent of hand, foot, and mouth disease and fatal neurological diseases in children. The neuropathogenicity of severe EV71 infection has been documented, but studies comparing mouse models of severe and mild EV71 infection are lacking. The aim of the study was to investigate the neurovirulence of EV71 strains and the differences in serum cytokine and chemokine levels in mouse models of severe and mild EV71 infection. Nine EV71 isolates belonging to the C4 subgenogroup (proposed as genotype D) displayed infectivity in human neuroblastoma SK-N-SH cells; moreover, ultrastructural observation confirmed viral particle replication...
November 20, 2017: Viruses
https://www.readbyqxmd.com/read/29129453/hepatitis-b-virus-core-particles-containing-multiple-epitopes-confer-protection-against-enterovirus-71-and-coxsackievirus-a16-infection-in-mice
#20
Chunling Huo, Jie Yang, Lei Lei, Lei Qiao, Jiantao Xin, Zishu Pan
Human enterovirus 71 (EV71) and coxsackievirus A16 (CA16) are the two major causative agents of hand-foot-and-mouth disease (HFMD). To investigate novel combined vaccines to prevent EV71 and CA16 infection, we constructed chimeric virus-like particles (tHBc/SPA or tHBc/SP VLPs) displaying conserved epitopes of EV71 (aa 208-222 of VP1 and aa 248-263 of VP2) and CA16 (aa271-285 of VP1) using a truncated hepatitis B virus core carrier (tHBc). Immunization with the chimeric VLPs induced epitope- or virus-specific IgG and neutralization antibodies against EV71 and CA16 in the mice...
December 19, 2017: Vaccine
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