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https://www.readbyqxmd.com/read/28735328/molecular-characterization-of-enteroviruses-isolated-from-acute-flaccid-paralysis-cases-in-poland-1999-2014
#1
Magdalena Wieczorek, Arleta Krzysztoszek
Enteroviruses (EVs) are among viral pathogens that can cause acute flaccid paralysis (AFP). This study represents an overview of EVs isolated through AFP surveillance in Poland between 1999 and 2014. The presence of enteroviruses was studied in stool samples that were collected from 747 AFP cases and their asymptomatic contacts. Fifty five (6.12%) cases of AFP were associated with enterovirus isolation. Out of the 55 positive cases, 40 were associated with detection of enterovirus in patient, and 15 with detection of EV in healthy contact, without positive detection in paralytic patient...
January 2, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/28732070/characterization-of-human-enterovirus71-virus-like-particles-used-for-vaccine-antigens
#2
Dandan Zhao, Bo Sun, Shiyang Sun, Bin Fu, Chuntian Liu, Dawei Liu, Yanfei Chu, Youlei Ma, Lu Bai, Yongge Wu, Yan Zhou, Weiheng Su, Ali Hou, Linjun Cai, Fei Xu, Wei Kong, Chunlai Jiang
Human enterovirus 71 (EV71) is a major causative pathogen of hand, foot and mouth disease (HFMD) and has caused outbreaks with significant mortality among young children in the Asia-Pacific region in recent years. Towards developing a vaccine for this disease, we have expressed and purified EV71 virus-like particles (VLPs), which resemble the authentic virus in appearance, capsid structure and protein sequence, from insect cells (Sf9) using a multistep chromatography process. We demonstrated intracellular localization of the VLPs in host cells by in situ immunogold detection, electron microscopy and immunofluorescence...
2017: PloS One
https://www.readbyqxmd.com/read/28724943/aim2-inflammasome-mediated-pyroptosis-in-enterovirus-a71-infected-neuronal-cells-restricts-viral-replication
#3
Thinesshwary Yogarajah, Kien Chai Ong, David Perera, Kum Thong Wong
Encephalomyelitis is a well-known complication of hand, foot, and mouth disease (HFMD) due to Enterovirus 71 (EV71) infection. Viral RNA/antigens could be detected in the central nervous system (CNS) neurons in fatal encephalomyelitis but the mechanisms of neuronal cell death is not clearly understood. We investigated the role of absent in melanoma 2 (AIM2) inflammasome in neuronal cell death, and its relationship to viral replication. Our transcriptomic analysis, RT-qPCR, Western blot, immunofluorescence and flow cytometry studies consistently showed AIM2 gene up-regulation and protein expression in EV-A71-infected SK-N-SH cells...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28712404/-polymorphisms-of-tlr7-rs3853839-and-rs179010-are-associated-with-susceptibility-to-and-severity-of-hand-foot-and-mouth-disease-caused-by-enterovirus-71-in-male-children
#4
Yaping Li, Song Zhai, Mei Li, Yuan Wang, Tong Lu, Huiling Deng, Xin Zhang, Shuangsuo Dang
Objective To investigate whether the polymorphisms of TLR7/MyD88 signaling pathway is associated with the susceptibility to and severity of hand, foot and mouth disease (HFMD) caused by enterovirus 71 (EV71) in children. Methods We collected 180 EV71 HFMD cases and 201 healthy controls from both the Second Affiliated Hospital of Xi'an Jiaotong University and Xi'an Children's Hospital. The genotypes including rs3853839, rs179010 of TLR7, and rs7744 of MyD88 were detected in the 381 samples by SNPscan kit. Results The susceptibility risk (OR=2...
July 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28711442/association-of-ev71-3c-polymorphisms-with-clinical-severity
#5
Hsuan-Yin Ma, Chun-Yi Lu, Kuo-Chien Tsao, Hsiu-Ming Shih, Ai-Ling Cheng, Li-Min Huang, Luan-Yin Chang
OBJECTIVES: Enterovirus 71 (EV71) may cause neurological and fatal cases. EV71 3C plays an important role on viral replication and possess proteolysis activity. To delineate pathogenesis of EV71 virulence, we studied EV71 3C genetics, protease activity and correlated the results with clinical severity. METHODS: EV71 cases were collected; 3C of EV71 was sequenced and linked with clinical severity. 3C protease activity, viral replication rates of EV71 infectious clones with different 3C and 3C interaction with host proteins were analyzed...
June 28, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28701404/enterovirus-3a-facilitates-viral-replication-by-promoting-pi4kb-acbd3-interaction
#6
Xia Xiao, Xiaobo Lei, Zhenzhen Zhang, Yijie Ma, Jianli Qi, Chao Wu, Yan Xiao, Li Li, Bin He, Jianwei Wang
Like other enteroviruses, EV71 relies on phosphatidylinositol-4-kinase IIIβ (PI4KB) for genome RNA replication. However, how PI4KB is recruited to the genome replication sites of EV71 remains elusive. Recently, we reported that a host factor ACBD3 is needed for EV71 replication by interacting with viral 3A protein. Here, we show that ACBD3 is required for the recruitment of PI4KB to RNA replication sites. Overexpression of viral 3A or EV71 infection stimulates the interaction of PI4KB and ACBD3. Consistently, EV71 infection induces the production of phosphatidylinositol-4-phosphate (PI4P)...
July 12, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28688753/antiviral-effects-of-retro-2-cycl-and-retro-2-1-against-enterovirus-71-in%C3%A2-vitro-and-in%C3%A2-vivo
#7
Wenwen Dai, Yu Wu, Jinpeng Bi, Xiaotong Lu, Ali Hou, Yan Zhou, Bo Sun, Wei Kong, Julien Barbier, Jean-Christophe Cintrat, Feng Gao, Daniel Gillet, Weiheng Su, Chunlai Jiang
Enterovirus 71 (EV71) is one of the causative pathogens of hand, foot and mouth disease (HFMD), especially the form associated with fatal neurological disorders. Sustained outbreaks of EV71 infections remain a serious health threat worldwide. However, no antiviral agent against EV71 for clinical therapy has been approved. Retro-2(cycl) and Retro-2.1 are inhibitors of several pathogens specifically targeting the intracellular vesicle transport, which also participates in the EV71 lifecycle processes including progeny virus release...
July 5, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28679757/enterovirus-71-inhibits-pyroptosis-through-cleavage-of-gsdmd
#8
Xiaobo Lei, Zhenzhen Zhang, Xia Xiao, Jianli Qi, Bin He, Jianwei Wang
Enterovirus 71 (EV71) can cause hand, foot, and mouth disease (HFMD) in young children. Severe infection with EV71 can lead to neurological complications and even death. However, the molecular basis of viral pathogenesis remain poorly understand. Here, we report that EV71 induces degradation of GSDMD, an essential component of pyroptosis. Remarkably, the viral protease 3C directly targets GSDMD and induces its cleavage, which is dependent on the protease activity. Further analyses show that the Q193-G194 pair within GSDMD is the cleavage site of 3C...
July 5, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28672946/enterovirus-71-infection-impairs-the-reproductive-capacity-of-female-mice
#9
Bo Qin, Qiuyue Yan, Xing Chen, Xiuping Xu, Yanan Wang, Jinkun Chen, Xuejun Dong
Enterovirus 71 (EV71) is a major cause of hand, foot and mouth disease (HFMD); however, no clinically approved vaccine or antiviral treatment is currently available for EV71 infection. In the present study, a murine model of EV71 infection was constructed. The clinical isolates of EV71 were amplified in Vero cells and used to challenge adult mice via hydrodynamic injection (HI) and intraperitoneal injection (IP). Following two challenges, >50% of the mice succumbed to EV71 infection. Surviving female mice were identified to have impaired fertility and their litter sizes were significantly decreased compared with the control group...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28651405/-clinical-stages-and-outcomes-of-severe-cases-on-hand-foot-and-mouth-disease
#10
J Zhang, Y Jin, J L Sun, Y X Wang, X J Wang, X Q Fu, Z P Miao, J Lyu
Objective: To understand the characteristics and relation of clinical stage and outcome of severe cases on hand, foot and mouth disease (HFMD) and to establish the evaluation method for understanding severity of this disease. Methods: According to factors as geographical location, economic and epidemic levels, five provinces (Henan, Shandong, Yunnan, Zhejiang and Sichuan provinces) were selected. Reported severe cases of HFMD from the National Notifiable Diseases Reporting System were selected randomly in the five provinces...
May 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28647978/-severe-cases-with-hand-foot-and-mouth-disease-data-based-on-national-pilot-hand-foot-and-mouth-disease-surveillance-system
#11
Y M Zheng, Z R Chang, L L Jiang, H Ji, G P Chen, P Luo, J J Pan, X L Tian, L L Wei, D Huo, Z P Miao, X N Zou, J H Chen, Q H Liao
Objective: To investigate the clinical severity, etiological classification and risk factors of severe cases with hand, foot and mouth disease (HFMD). Methods: A total of 1 489 records on severe and fatal HFMD cases reported to the national pilot surveillance system of HFMD were used to analyze the demographic, medical treatment, etiological classification of the cases. Treatment outcome related risk factors were also studied with multi-variable stepwise logistic regression method. Results: Seven out of the 1 489 severe HFMD cases died of this disease...
June 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28647185/relationship-between-catecholamine-level-and-gene-polymorphism-of-%C3%AE-1-adrenergic-receptor-g1165c-in-children-with-ev71-infection-in-hand-foot-and-mouth-disease
#12
Zhi-Xian Lei, Bang-Tao Li, Hong-Ai Li, Xiao-Ming Li, Man-Fang Xie, Ting Huang, Qi Wang, Ya-Zhou Wang, Qiu-Yu Lin, Li-Rong Zhou, Nai-Chao Feng, Xin Li, Dao-Mou Zhu, Yuan-Ping Hai, Lan Cui, Ya-Qin Zhang, Zhi-Wen Liu, Shou-Ye Wu, Yong-Zhao Chen, Ke-Qing Zhu, Xiao-Jie He, Wei Xiang
OBJECTIVE: To investigate the relationship between the levels of plasma adrenaline and norepinephrine and gene polymorphism of β1 adrenergic receptor G1165C in children with enterovirus 71 (EV71) infection in hand foot and mouth disease (HFMD). METHODS: The polymerase chain reaction (PCR) was used to detect the expression of gene polymorphism of β1 adrenergic receptor G1165C in vitro. The levels of plasma adrenaline and norepinephrine were measured by enzyme-linked immunosorbent assay (ELISA)...
May 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28629711/single-step-construction-of-a-picornavirus-replicon-rna-with-precise-ends
#13
Qing Xiong, Yuya Wang, Bingyu Xie, Xinyi Pei, Yihong Peng
A versatile single-step method is described for constructing a picornavirus replicon RNA with precise ends to facilitate improved understanding of viral genome function and mimic native virus replication in host cells as far as possible. The key innovation in this new approach is the use of a bridge primer to both introduce a ribozyme sequence for cis-cleavage of RNA to generate precise 5' ends of EV71 RNA and also mediate overlapping assembly of two fragments. Using an EV71 replicon as a test case, precise ends for the viral replicon were shown to be important for efficient virus replication...
June 16, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28625847/hnrnp-a1-alters-the-structure-of-a-conserved-enterovirus-ires-domain-to-stimulate-viral-translation
#14
Michele Tolbert, Christopher E Morgan, Marvin Pollum, Carlos E Crespo-Hernández, Mei-Ling Li, Gary Brewer, Blanton S Tolbert
Enteroviruses use a type I IRES structure to facilitate protein synthesis and promote genome replication. Type I IRES elements require auxiliary host proteins to organize RNA structure for 40S ribosomal subunit assembly. Heterogeneous nuclear ribonucleoprotein A1 stimulates Enterovirus 71 (EV71) translation in part through specific interactions with its stem loop II (SLII) IRES domain. Here, we determined a conjoined NMR-SAXS structure of the EV71 SLII domain and a mutant that significantly attenuates viral replication by abrogating hnRNP A1 interactions...
June 15, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28625729/vaccinols-j-s-ten-new-salicyloid-derivatives-from-the-marine-mangrove-derived-endophytic-fungus-pestalotiopsis-vaccinii
#15
Jun-Feng Wang, Rui Liang, Sheng-Rong Liao, Bin Yang, Zheng-Chao Tu, Xiu-Ping Lin, Bin-Gui Wang, Yonghong Liu
Ten new salicyloid derivatives, namely vaccinols J-S (1-10), along with five known compounds (11-15) were isolated from Pestalotiopsis vaccinii (cgmcc3.9199) endogenous with the mangrove plant Kandelia candel (L.) Druce (Rhizophoraceae). Their structures including absolute configurations were established on the basis of spectroscopic analysis, optical rotation, CD spectra, quantum ECD calculations. To the best of our knowledge, vaccinol J (1) is the first example of salicyloid derivatives containing 2-methylfuran moiety...
June 15, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28621671/association-study-of-inflammatory-cytokine-and-chemokine-expression-in-hand-foot-and-mouth-disease
#16
Wenzhong Shang, Suying Qian, Lijuan Fang, Yong Han, Cuiping Zheng
OBJECTIVE: To determine the relationship of cytokine/chemokine expression with the clinical presentation of hand, foot and mouth disease (HFMD). RESULTS: All cytokine/chemokine levels were higher in severe HFMD patients than in mild HFMD patients or controls (P < 0.01). RANTES, MCP-1, IL-4, IL-12 and IL-18 levels were higher in mild HFMD patients than in the controls (P < 0.05). In severe HFMD, all levels (except IL-8 and IL-4) were higher in patients with encephalitis plus pulmonary edema than in those with encephalitis alone (P < 0...
June 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28615098/-human-ev71-invades-human-neuroblastoma-sk-n-sh-cells-by-clathrin-mediated-endocytosis
#17
Yanhua Xu, Quanbo Liu, Zhenzhen Zhang
Objective To study the mechanism ofhuman enterovirus 71 (EV71) entering human neuroblastoma SK-N-SH cells. Methods After the SK-N-SH cells were pretreated with chlorpromazine (CPZ) or nystatin (NT), real-time quantitative PCR (qRT-PCR) was employed to measure EV71 mRNA level, and indirect immunofluorescence microscopy was used to detect the expression level of viral protein 1 (VP1) in the target cells. In order to reveal the colocalization of EV71 with clathrin, laser confocal microscopy was performed on the infected cells...
June 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28610823/pre-vaccination-evolution-of-antibodies-among-infants-0-3-and-6months-of-age-a-longitudinal-analysis-of-measles-enterovirus-71-and-coxsackievirus-16
#18
Chuanxi Fu, Jichuan Shen, Long Lu, Yajing Li, Yimin Cao, Ming Wang, Sen Pei, Zhicong Yang, Qing Guo, Jeffrey Shaman
BACKGROUND: Due to waning levels of maternal antibodies (measles; enterovirus 71, EV71; and coxsackievirus A16, CoxA16), some infants may lose protection against infection prior to vaccination. Using a longitudinal design, we examine how maternal antibody levels evolve over time in infants prior to vaccination. METHODS: In 2013-2014, we collected sera at ages 0, 3 and 6months from infants. We assayed for levels of measles IgG antibody (717, 233 and 75 sample sera tested at months 0, 3 and 6, respectively), and neutralizing antibodies for EV71 and CoxA16 (225, 217, and 72)...
June 10, 2017: Vaccine
https://www.readbyqxmd.com/read/28602802/synonymous-codon-usage-analysis-of-hand-foot-and-mouth-disease-viruses-a-comparative-study-on-coxsackievirus-a6-a10-a16-and-enterovirus-71-from-2008-to-2015
#19
Weiheng Su, Xue Li, Meili Chen, Wenwen Dai, Shiyang Sun, Shuai Wang, Xin Sheng, Shixiang Sun, Chen Gao, Ali Hou, Yan Zhou, Bo Sun, Feng Gao, Jingfa Xiao, Zhewen Zhang, Chunlai Jiang
Enterovirus 71 (EV71) and coxsackievirus A16 (CVA16) have been considered major pathogens of hand, foot and mouth disease (HFMD) throughout the world for decades. In recent years, coxsackievirus A6 (CVA6) and coxsackievirus A10 (CVA10) have raised attention as two other serious pathogens of HFMD. The present study focused on the synonymous codon usage of four viruses isolated from 2008 to 2015, with particular attention on P1 (encoding capsid proteins) and P2-P3 regions (both encoding non-structural proteins) in the genomic RNA...
June 14, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28594402/arrdc4-regulates-enterovirus-71-induced-innate-immune-response-by-promoting-k63-polyubiquitination-of-mda5-through-trim65
#20
Jun Meng, Zhenyu Yao, Yaqing He, Renli Zhang, Yanwei Zhang, Xiangjie Yao, Hong Yang, Long Chen, Zhen Zhang, Hailong Zhang, Xueqin Bao, Gang Hu, Tangchun Wu, Jinquan Cheng
Enterovirus 71 (EV71) is the main causative agent of hand, foot and mouth disease (HFMD), which induces significantly elevated levels of cytokines and chemokines, leading to local or system inflammation and severe complications, whereas the underlying regulatory mechanisms and the inflammatory pathogenesis remain elusive. ARRDC4 is one member of arrestins family, having important roles in glucose metabolism and G-protein-coupled receptors (GPCRs) related physiological and pathological processes, however, the function of ARRDC4 in innate immune system is largely unknown...
June 8, 2017: Cell Death & Disease
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