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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
#1
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...
November 9, 2017: Vaccine
https://www.readbyqxmd.com/read/29122092/rapid-and-accurate-sequencing-of-enterovirus-genomes-using-minion-nanopore-sequencer
#2
Ji Wang, Yue Hua Ke, Yong Zhang, Ke Qiang Huang, Lei Wang, Xin Xin Shen, Xiao Ping Dong, Wen Bo Xu, Xue Jun Ma
OBJECTIVE: Knowledge of an enterovirus genome sequence is very important in epidemiological investigation to identify transmission patterns and ascertain the extent of an outbreak. The MinION sequencer is increasingly used to sequence various viral pathogens in many clinical situations because of its long reads, portability, real-time accessibility of sequenced data, and very low initial costs. However, information is lacking on MinION sequencing of enterovirus genomes. METHODS: In this proof-of-concept study using Enterovirus 71 (EV71) and Coxsackievirus A16 (CA16) strains as examples, we established an amplicon-based whole genome sequencing method using MinION...
October 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/29120300/enterovirus-71-antagonizes-the-antiviral-activity-of-host-stat3-and-il-6r-with-partial-dependence-on-virus-induced-mir-124
#3
Zhangmei Chang, Yan Wang, Liang Bian, Qingqing Liu, Jian-Er Long
Enterovirus 71 (EV71) has caused major outbreaks of hand, foot and mouth disease. EV71 infections increase the production of many host cytokines and pro-inflammatory factors, including interleukin (IL)-6, IL-10 and COX-2. Some of these molecules could stimulate the signal transducer and activator of transcription 3 (STAT3), which plays a key role in regulating host immune responses and several viral diseases. However, the role of STAT3 in EV71 infection remains unknown. This study found that the phosphorylation levels of STAT3 (p(Y705)-STAT3) are closely related to EV71 infection...
November 9, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/29117742/dereplication-and-targeted-isolation-of-bioactive-sulphur-compound-from-bacteria-isolated-from-a-hydrothermal-field
#4
Xiuping Lin, Kunlong Li, Lilin Yang, Xiaoying Peng, Wei Fang, Xinpeng Tian, Yonghong Liu, Xuefeng Zhou
Marine micro-organisms in the deep-sea hydrothermal vent systems are considered as potential sources of bioactive natural products. Sixteen bacterial strains were isolated from a deep-sea hydrothermal field and screened for bioactive metabolism studies. After the strains were subjected to bioactive testing at different culture media, chemical dereplication by HPLC coupled to high-resolution mass spectrometer was performed to analyse or determine the main secondary metabolisms in those strains. Strain 06204 was large-scale fermented with relative optimal media, for isolating the desired sulphur compound...
November 9, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29115505/alanine-scanning-mutagenesis-of-sp70-epitope-in-characterizing-species%C3%A2-specific-antibodies-induced-by-enterovirus-71%C3%A2-based-antigens
#5
Meng Gao, Feng Zhang, Yun Zhu, Limei Gao, Yunshui Jiang, Yongneng Luo, Fangchang Zhuang, Zian Mao, Jiangsen Mao
The enterovirus 71 (EV71) SP70 epitope, derived from amino acids 208‑222 of VP1, is a neutralizing epitope. The present study aimed to assess the inter‑species differences of the antibodies induced by EV71‑based antigens in responses to SP70 mutant peptides. BALB/c mice and Lou/C rats were immunized with EV71 SP70. Monoclonal antibodies (Mabs) were produced by hybridoma clones. Serum polyclonal antibodies (Pabs) were produced from BALB/c mice and New Zealand white rabbits immunized with recombinant EV71 VP1 (rEV71‑VP1) protein or inactivated EV71...
November 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29113363/involvement-of-inducible-nitric-oxide-synthase-and-mitochondrial-dysfunction-in-the-pathogenesis-of-enterovirus-71-infection
#6
Dejian Dang, Chao Zhang, Rongguang Zhang, Weidong Wu, Shuaiyin Chen, Jingchao Ren, Peng Zhang, Guangyuan Zhou, Demin Feng, Tiantian Sun, Ying Li, Qiaoli Liu, Mengchen Li, Yuanlin Xi, Yuefei Jin, Guangcai Duan
Enterovirus71 (EV71) is recognized as the main causative agent of severe hand, foot and mouth disease (HFMD). However, the pathogenesis of EV71 infection has not been well characterized. Clinical evidence indicated that inducible nitric oxide synthase (iNOS) induction in the lung of HFMD patients contributes to the severe symptoms of pulmonary edema. In the present study, we recruited 142 subjects including HFMD patients and controls, and serum level of nitric oxide (NO) was determined. Next, cellular and animal model were used to further investigate the roles of iNOS and mitochondria damage during EV71 infection...
October 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/29108321/association-study-of-inflammatory-cytokine-and-chemokine-expression-in-hand-foot-and-mouth-disease
#7
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...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29094241/impact-of-il-10-1082a-g-gene-polymorphism-on-the-severity-of-ev71-infection-in-chinese-children
#8
Qiubo Li, Hongfang He, Ya Guo, Yu Zhang, Peipei Liu, Yedan Liu, Chengqing Yang, Jie Song, Na Zhang, Zongbo Chen
No abstract text is available yet for this article.
November 1, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29093091/a-3-0-angstrom-resolution-cryo-electron-microscopy-structure-and-antigenic-sites-of-coxsackievirus-a6-like-particles
#9
Jinhuan Chen, Chao Zhang, Yu Zhou, Xiang Zhang, Chaoyun Shen, Xiaohua Ye, Wen Jiang, Zhong Huang, Yao Cong
Coxsackievirus A6 (CVA6) has recently emerged as one of the predominant causative agents of hand, foot, and mouth disease (HFMD). Structure of CVA6 mature viral particle has not been solved thus far. Our previous work shows that recombinant virus-like particles (VLPs) of CVA6 represent a promising CVA6 vaccine candidate. Here, we report the first cryo-electron microscopy (cryo-EM) structure of CVA6 VLP at 3.0 Å resolution. CVA6 VLP exhibits the characteristic features of enteroviruses, but presents an open channel at the two-fold axis and an empty, collapsed VP1 pocket, which is broadly similar to the structures of enterovirus 71 (EV71) VLP and coxsackievirus A16 (CVA16) 135S expanded particle, indicating that CVA6 VLP is in an expanded conformation...
November 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29073897/a-comparative-study-of-multiple-clinical-enterovirus-71-isolates-and-evaluation-of-cross-protection-of-inactivated-vaccine-strain-fy-23%C3%A2-k-b-in-vitro
#10
Ting Yang, Hua Li, Lei Yue, Xia Song, Tianhong Xie, Shaohui Ma, Huaqing Meng, Ye Zhang, Xin He, Runxiang Long, Rong Yang, Fangyu Luo, Zhongping Xie, Qihan Li
BACKGROUND: Enterovirus 71 (EV71) is one of the causative agents of hand, foot and mouth disease, which mostly affects infants and children and leads to severe neurological diseases. Vaccination offers the best option for disease control. We have screened the virus strain FY-23 K-B, which is used as an inactivated vaccine strain. An important issue in the development of vaccines is whether they provide cross protection against all other strains. METHODS: We collected and identified 19 clinical EV71 isolates from mainland China, which all belong to the C4 genotype...
October 26, 2017: Virology Journal
https://www.readbyqxmd.com/read/29070691/structure-immunogenicity-and-protective-mechanism-of-an-engineered-enterovirus-71-like-particle-vaccine-mimicking-80s-empty-capsid
#11
Xiaoli Wang, Zhiqiang Ku, Xiang Zhang, Xiaohua Ye, Jinhuan Chen, Qingwei Liu, Wei Zhang, Chao Zhang, Zhenglin Fu, Xia Jin, Yao Cong, Zhong Huang
Enterovirus 71 (EV71) is the major causative agent of severe hand, foot and mouth disease which affects millions of young children in the Asia-Pacific region annually. In this study, we engineered a novel EV71 virus-like particle (VLP) that lacks VP4 (thereby designated "VLPΔVP4"), and investigated its structure, antigenicity and vaccine potential. The cryo-EM structure of VLPΔVP4 was reconstructed to 3.71 Å resolution. Results from structural and biochemical analyses reveal that VLPΔVP4 resembles the end product of the viral uncoating process, the 80S empty capsid...
October 25, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29052054/suppression-of-the-toll-like-receptor-7-dependent-type-i-interferon-production-pathway-by-autophagy-resulting-from-enterovirus-71-and-coxsackievirus-a16-infections-facilitates-their-replication
#12
Jie Song, Yajie Hu, Jiaqi Li, Huiwen Zheng, Jingjing Wang, Lei Guo, Haijng Shi, Longding Liu
Toll-like receptors (TLRs) act as molecular sentinels, detecting invading viral pathogens and triggering host innate immune responses, including autophagy. However, many viruses have evolved a series of strategies to manipulate autophagy for their own benefit. Enterovirus 71 (EV71) and coxsackievirus A16 (CA16), as the primary agents causing hand, foot and mouth disease (HFMD), can induce autophagy leading to their replication. Therefore, the objective of this study was to investigate whether enhanced viral replication caused by autophagy in EV71 and CA16 infections was associated with a TLR-related signaling pathway...
October 19, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29042981/sophocarpine-against-enterovirus-71-in-vitro
#13
Zengjun Jin, Lixin Yang, Guotao Ding, Guoxing Yang, Yonghong Han, Xia Zhang, Weihao Li
Sophocarpine (SCA) is a bioactive alkaloid present in Sophoraflavescens Ait. The present study demonstrated that SCA inhibited enterovirus 71 (EV71) infection in Vero cells. The results indicated that the 50% cytotoxicity concentration of SCA for Vero cells was 1,346 µg/ml, and the 50% inhibition concentration of SCA against EV71 was 350 µg/ml. SCA produced a marked inhibitory effect against EV71 when the Vero cells were treated with SCA prior to infection with the virus. Additionally, SCA was effective against EV71 when the Vero cells were infected with EV71 (100xTCID50) that had been treated with SCA for 2 h, and was effective when the Vero cells were infected with EV71 (100xTCID50) at 37°C under 5% CO2 for 2 h prior to treatment with SCA for 2 h...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29039284/the-association-between-diurnal-temperature-range-and-childhood-hand-foot-and-mouth-disease-a-distributed-lag-non-linear-analysis
#14
Fei Yin, Yue Ma, Xing Zhao, Qiang Lv, Yaqiong Liu, Tao Zhang, Xiaosong Li
In recent years, hand, foot, and mouth disease (HFMD) has been increasingly recognized as a critical challenge to disease control and prevention in China. Previous studies have found that meteorological factors such as mean temperature and relative humidity were associated with HFMD. However, little is known about whether the diurnal temperature range (DTR) has any impact on HFMD. This study aimed to quantify the impact of DTR on childhood HFMD in 18 cities in Sichuan Province. A distributed lag non-linear model was adopted to explore the temporal lagged association of daily temperature with age-, gender- and pathogen-specific HFMD...
October 17, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/29039066/pattern-classification-of-enterovirus-71-associated-hand-foot-and-mouth-disease-in-chinese-medicine-a-retrospective-study-in-433-cases
#15
Yan Liu, Li-Yun He, Tian-Cai Wen, Shi-Yan Yan, Wen-Jing Bai, Bao-Yan Liu
OBJECTIVE: To determine whether patterns of enterovirus 71 (EV71)-associated hand, foot, and mouth disease (HFMD) were classified based on symptoms and signs, and explore whether individual characteristics were correlated with membership in particular pattern. METHODS: Symptom-based latent class analysis (LCA) was used to determine whether patterns of EV71-HFMD existed in a sample of 433 cases from a clinical data warehouse system. Logistic regression was then performed to explore whether demographic, and laboratory data were associated with pattern membership...
October 17, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/29034730/corydaline-inhibits-enterovirus-71-replication-by-regulating-cox-2-expression
#16
Hui-Qiang Wang, Jin Hu, Hai-Yan Yan, Shuo Wu, Yu-Huan Li
Enterovirus 71 (EV71) is a huge threat to the worldwide public health and there is no approved antiviral drug for EV71-induced disease therapy. Corydaline exists antiallergic and antinociceptive activities, but the anti-EV71 activity of corydaline is still not reported. In this study, corydaline could suppress the expression of viral structural and non-structural proteins. Furthermore, corydaline inhibits EV71 replication by suppressing the COX-2 expression and the phosphorylation of JNK MAPK and P38 MAPK but not ERK MAPK in vitro...
October 15, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/29016136/specific-unbinding-forces-between-mutated-human-p-selectin-glycoprotein-ligand-1-and-viral-protein-1-measured-using-force-spectroscopy
#17
Chen-Chu Wang, Kundan Sivashanmugan, Chung-Ku Chen, Jian-Ren Hong, Wei-I Sung, Jiunn-Der Liao, Yuh-Shyong Yang
Protein tyrosine sulfation (PTS) is a key modulator of extracellular protein-protein interaction (PPI), which regulates principal biological processes. For example, the capsid protein VP1 of enterovirus 71 (EV71) specifically interacts with sulfated P-selectin glycoprotein ligand-1 (PSGL-1) to facilitate virus invasion. Currently available methods cannot be used to directly observe PTS-induced PPI. In this study, atomic force microscopy was used to measure the interaction between sulfated or mutated PSGL-1 and VP1...
October 13, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28993196/long-non-coding-rna-expression-profiles-in-different-severity-ev71-infected-hand-foot-and-mouth-disease-patients
#18
Jun Meng, Zhenyu Yao, Yaqing He, Renli Zhang, Hong Yang, Xiangjie Yao, Long Chen, Hailong Zhang, Jinquan Cheng
Enterovirus 71 (EV71) is associated with the severe hand foot and mouth disease (HFMD) outcomes, however the host-virus interaction mechanism and the pathogenesis remain poorly understood. Long non-coding RNAs (lncRNAs) are involved in variety physiological and pathological processes, but the functions of lncRNAs in EV71 infection remain elusive. Here we profiled the expression of lncRNAs in peripheral blood mononuclear cells (PBMCs) from EV71-infected mild patients, severe patients as well as the healthy controls, and identified 8541 lncRNAs were differentially expressed...
December 2, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28987950/antiviral-activity-of-a-polysaccharide-from-laminaria-japonica-against-enterovirus-71
#19
Yingying Yue, Zhihui Li, Peng Li, Nannan Song, Bingqing Li, Wei Lin, Shuntao Liu
This in vitro study investigated the antiviral activity of an acidic polysaccharide from Laminaria japonica against enterovirus 71 (EV71) as well as its mechanism of action. The LJ04 polysaccharide was purified from Laminaria japonica by affinity chromatography. To investigate its antiviral activity, an MTT assay, q-PCR, immunofluorescent staining and western-blot analysis were performed. To define its mechanism of action, ELISA, q-PCR and flow cytometry were conducted. LJ04 had a low EC50, high CC50 and high SI...
October 5, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28985237/enterovirus-71-protease-2apro-and-3cpro-differentially-inhibit-the-cellular-endoplasmic-reticulum-associated-degradation-erad-pathway-via-distinct-mechanisms-and-enterovirus-71-hijacks-erad-component-p97-to-promote-its-replication
#20
Tao Wang, Bei Wang, He Huang, Chongyang Zhang, Yuanmei Zhu, Bin Pei, Chaofei Cheng, Lei Sun, Jianwei Wang, Qi Jin, Zhendong Zhao
Endoplasmic reticulum-associated degradation (ERAD) is an important function for cellular homeostasis. The mechanism of how picornavirus infection interferes with ERAD remains unclear. In this study, we demonstrated that enterovirus 71 (EV71) infection significantly inhibits cellular ERAD by targeting multiple key ERAD molecules with its proteases 2Apro and 3Cpro using different mechanisms. Ubc6e was identified as the key E2 ubiquitin-conjugating enzyme in EV71 disturbed ERAD. EV71 3Cpro cleaves Ubc6e at Q219G, Q260S, and Q273G...
October 2017: PLoS Pathogens
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