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Virologica Sinica

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https://www.readbyqxmd.com/read/29076011/hepatitis-c-virus-induced-prion-protein-expression-facilitates-hepatitis-c-virus-replication
#1
Huixia Zhang, Shanshan Gao, Rongjuan Pei, Xinwen Chen, Chaoyang Li
Hepatitis C virus (HCV) infects approximately 180 million people worldwide. Significant progress has been made since the establishment of in vitro HCV infection models in cells. However, the replication of HCV is complex and not completely understood. Here, we found that the expression of host prion protein (PrP) was induced in an HCV replication cell model. We then showed that increased PrP expression facilitated HCV genomic replication. Finally, we demonstrated that the KKRPK motif on the N-terminus of PrP bound nucleic acids and facilitated HCV genomic replication...
October 25, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29047018/identification-of-a-novel-torque-teno-mini-virus-in-cerebrospinal-fluid-from-a-child-with-encephalitis
#2
LETTER
Yan-Jun Kang, Mei-Fang Zhou, Wei Huang, Chao Deng, Gen Yan, Zhong-Hua Lu
Anelloviruses are single-strand circular DNA viruses and ubiquitous within the human population. Although there is no direct evidence, many studies have suggested the anelloviruses may be associated with a variety of diseases. In this study, a novel torque teno mini virus (TTMV) was detected in a child with unexplained encephalitis. The detected virus had a circular genome of 2943 nt in length and 3 open reading frames. It shared 45.4% - 35.9% nucleotide identities with known TTMV species and < 35% with the other species of anellovirus, which suggested it might belong to a new species within the genus Betatorquevirus...
October 17, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/28971350/productive-hbv-infection-of-well-differentiated-hntcp-expressing-human-hepatoma-derived-huh7-cells
#3
Ming Zhou, Kaitao Zhao, Yongxuan Yao, Yifei Yuan, Rongjuan Pei, Yun Wang, Jizheng Chen, Xue Hu, Yuan Zhou, Xinwen Chen, Chunchen Wu
Feasible and effective cell models for hepatitis B virus (HBV) infection are required for investigating the complete lifecycle of this virus, including the early steps of viral entry. Resistance to dimethyl sulfoxide/polyethylene glycol (DMSO/PEG), hNTCP expression, and a differentiated state are the limiting factors for successful HBV infection models. In the present study, we used a hepatoma cell line (Huh7D(hNTCP)) to overcome these limiting factors so that it exhibits excellent susceptibility to HBV infection...
September 29, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/28918477/in-vitro-inhibition-of-hiv-1-replication-in-autologous-cd4-t-cells-indicates-viral-containment-by-multifactorial-mechanisms
#4
Ting Tu, Jianbo Zhan, Danlei Mou, Wei Li, Bin Su, Tong Zhang, Tao Li, Ning Li, Hao Wu, Cong Jin, Huabiao Chen
HIV-1-specific cytotoxic T lymphocytes (CTLs) and neutralizing antibodies (NAbs) are present during chronic infection, but the relative contributions of these effector mechanisms to viral containment remain unclear. Here, using an in vitro model involving autologous CD4(+) T cells, primary HIV-1 isolates, HIV-1-specific CTLs, and neutralizing monoclonal antibodies, we show that b12, a potent and broadly neutralizing monoclonal antibody to HIV-1, was able to block viral infection when preincubated with virus prior to infection, but was much less effective than CTLs at limiting virus replication when added to infected cell cultures...
September 15, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/28884445/antiviral-activity-of-quercetin-3-%C3%AE-o-d-glucoside-against-zika-virus-infection
#5
LETTER
Gary Wong, Shihua He, Vinayakumar Siragam, Yuhai Bi, Majambu Mbikay, Michel Chretien, Xiangguo Qiu
No abstract text is available yet for this article.
September 5, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/28865053/dc-sign-promotes-japanese-encephalitis-virus-transmission-from-dendritic-cells-to-t-cells-via-virological-synapses
#6
Ping Wang, Mei Li, Wei Lu, Di Zhang, Qinxue Hu, Yalan Liu
Skin-resident dendritic cells (DCs) likely encounter incoming viruses in the first place, and their migration to lymph nodes following virus capture may promote viral replication. However, the molecular mechanisms underlying these processes remain unclear. In the present study, we found that compared to cell-free viruses, DC-bound viruses showed enhanced capture of JEV by T cells. Additionally, JEV infection was increased by co-culturing DCs and T cells. Blocking the C-type lectin receptor DC-specific intercellular adhesion molecule-3-grabbing non-integrin (DC-SIGN) with neutralizing antibodies or antagonists blocked JEV transmission to T cells...
August 31, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/28865052/an-improved-method-for-identifying-sumoylation-sites-of-viral-proteins
#7
LETTER
Yan Liu, Zhongyuan Tan, Bo Shu, Yuan Zhang, Caishang Zheng, Xianliang Ke, Xi Chen, Hanzhong Wang, Zhenhua Zheng
No abstract text is available yet for this article.
August 31, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29116595/herpesviruses-epidemiology-pathogenesis-and-interventions
#8
EDITORIAL
Ke Lan, Min-Hua Luo
No abstract text is available yet for this article.
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29116594/elevated-expression-of-ebv-and-tlrs-in-the-brain-is-associated-with-rasmussen-s-encephalitis
#9
Xin Wang, Yisong Wang, Dong Liu, Peigang Wang, Dongying Fan, Yuguang Guan, Tianfu Li, Guoming Luan, Jing An
Rasmussen's encephalitis (RE) is a rare pediatric neurological disorder, the etiology of which remains unclear. It has been speculated that the immunopathogenesis of RE involves damage to neurons, which eventually leads to the occurrence of RE. Viral infection may be a critical factor in triggering RE immunopathogenesis. In this study, we analyzed the expression of Epstein-Barr virus (EBV) antigens as well as of Toll-like receptor 3 (TLR3), TLR9, and downstream adapter TIRdomain-containing adapter-inducing interferon-β (TRIF) in the brain tissues of 26 patients with RE and 16 control individuals using immunohistochemistry (IHC)...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29116593/human-cytomegalovirus-mir-us5-1-inhibits-viral-replication-by-targeting-geminin-mrna
#10
Shujuan Jiang, Yujing Huang, Ying Qi, Rong He, Zhongyang Liu, Yanping Ma, Xin Guo, Yaozhong Shao, Zhengrong Sun, Qiang Ruan
Viruses commonly create favorable cellular conditions for their survival through multiple mechanisms. MicroRNAs (miRNAs), which function as post-transcriptional regulators, are utilized by human cytomegalovirus (HCMV) in its infection and pathogenesis. In the present study, the DNA replication inhibitor Geminin (GMNN) was identified to be a direct target of hcmv-miR-US5-1. Overexpression of hcmv-miR-US5-1 could block the accumulation of GMNN during HCMV infection, and the decrease of GMNN expression caused by hcmv-miR-US5-1 or GMNN specific siRNA reduced HCMV DNA copies in U373 cells...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29116592/varicella-zoster-virus-orf7-interacts-with-orf53-and-plays-a-role-in-its-trans-golgi-network-localization
#11
Wei Wang, Wenkun Fu, Dequan Pan, Linli Cai, Jianghui Ye, Jian Liu, Che Liu, Yuqiong Que, Ningshao Xia, Hua Zhu, Tong Cheng
Varicella-zoster virus (VZV) is a neurotropic alphaherpesvirus that causes chickenpox and shingles. ORF7 is an important virulence determinant of VZV in both human skin and nerve tissues, however, its specific function and involved molecular mechanism in VZV pathogenesis remain largely elusive. Previous yeast two-hybrid studies on intraviral protein-protein interaction network in herpesviruses have revealed that VZV ORF7 may interact with ORF53, which is a virtually unstudied but essential viral protein. The aim of this study is to identify and characterize VZV ORF53, and to investigate its relationship with ORF7...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29116591/prevalence-of-kaposi-s-sarcoma-associated-herpesvirus-in-uygur-and-han-populations-from-the-urumqi-and-kashgar-regions-of-xinjiang-china
#12
Jun Zheng, Yang Yang, Meng Cui, Zhan-Jun Shu, Li-Li Han, Zhen-Qiu Liu, Charles Wood, Tiejun Zhang, Yan Zeng
Kaposi's sarcoma-associated herpesvirus (KSHV) is the infectious etiologic agent associated with Kaposi's sarcoma (KS), primary effusion lymphoma, and multicentric Castleman disease. It has been shown that high KSHV prevalence and high incidence of both classic KS and AIDSassociated KS are found mostly among people of Uygur ethnicity in Xinjiang, while people of Han ethnicity in Xinjiang have a higher KSHV seroprevalence than those of other Han populations in mainland China. However, it is still unclear why there is such geographical and population variation in KSHV distribution in China...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29116590/detection-of-congenital-cytomegalovirus-in-newborns-using-nucleic-acid-amplification-techniques-and-its-public-health-implications
#13
REVIEW
Guoyu Liu, Rong Hai, Fenyong Liu
Human cytomegalovirus (HCMV), a herpesvirus, is an important human pathogen that causes asymptomatic infections in healthy or immunocompetent individuals but can lead to severe and potentially life-threatening complications in immune-immature individuals such as neonates or immune-compromised patients such as organ-transplant recipients and HIV-positive individuals. Congenital HCMV infection represents a significant public health issue and poses substantial healthcare and economic burden to society. This virus causes the most common viral congenital infection worldwide, and is the leading non-genetic cause of sensorineural hearing loss in children in developed countries...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29116589/extracellular-vesicles-novel-vehicles-in-herpesvirus-infection
#14
REVIEW
Lingzhi Liu, Quan Zhou, Yan Xie, Lielian Zuo, Fanxiu Zhu, Jianhong Lu
Herpesviruses are remarkable pathogens that have evolved multiple mechanisms to evade host immunity, ensuring their proliferation and egress. Among these mechanisms, herpesviruses utilize elaborate extracellular vesicles, including exosomes, for the intricate interplay between infected host and recipient cells. Herpesviruses incorporate genome expression products and direct cellular products into exosomal cargoes. These components alter the content and function of exosomes released from donor cells, thus affecting the downstream signalings of recipient cells...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29116588/the-regulatory-role-of-protein-phosphorylation-in-human-gammaherpesvirus-associated-cancers
#15
REVIEW
Yuyan Wang, Shuvomoy Banerjee, Ling Ding, Cankun Cai, Fang Wei, Qiliang Cai
Activation of specific sets of protein kinases by intracellular signal molecules has become more and more apparent in the past decade. Phosphorylation, one of key posttranslational modification events, is activated by kinase or regulatory protein and is vital for controlling many physiological functions of eukaryotic cells such as cell proliferation, differentiation, malignant transformation, and signal transduction mediated by external stimuli. Moreovers, the reversible modification of phosphorylation and dephosphorylation can result in different features of the target substrate molecules including DNA binding, protein-protein interaction, subcellular location and enzymatic activity, and is often hijacked by viral infection...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29038977/prevalence-of-kaposi-s-sarcoma-associated-herpesvirus-among-intravenous-drug-users-a-systematic-review-and-meta-analysis
#16
Qiwen Fang, Zhenqiu Liu, Zhijie Zhang, Yan Zeng, Tiejun Zhang
Intravenous drug users (IDUs) have been demonstrated to be highly vulnerable to HIV/AIDS. Nevertheless, the prevalence of Kaposi's sarcoma associated herpesvirus (KSHV), an important co-infected agent with HIV, among this population remained obscure. We conducted a systematic review on the epidemiological features of KSHV among IDUs worldwide. Eligible studies were retrieved from 6 electronic databases (PubMed, EMBASE, Web of Science, CBM, CNKI and Wanfang). We calculated the pooled prevalence and 95% confidence interval (CI) overall and among subgroups using either random-effects model or fixed-effects model depending on between-study heterogeneity...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29019168/lipids-lipid-metabolism-and-kaposi-s-sarcoma-associated-herpesvirus-pathogenesis
#17
REVIEW
Lu Dai, Zhen Lin, Wei Jiang, Erik K Flemington, Zhiqiang Qin
Lipids are essential for mammalian cells to maintain many physiological functions. Emerging evidence has shown that cancer cells can develop specific alterations in lipid biosynthesis and metabolism to facilitate their survival and various malignant behaviors. To date, the precise role of cellular lipids and lipid metabolism in viral oncogenesis is still largely unclear with only a handful of literature covering this topic to implicate lipid metabolism in oncogenic virus associated pathogenesis. In this review, we focus on the role of lipid biosynthesis and metabolism in the pathogenesis of the Kaposi's sarcoma-associated herpesvirus, a common causative factor for cancers arising in the immunocompromised settings...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/28971351/attenuated-phenotypes-and-analysis-of-a-herpes-simplex-virus-1-strain-with-partial-deletion-of-the-ul7-ul41-and-lat-genes
#18
Xingli Xu, Yingqiu Guo, Shengtao Fan, Pingfang Cui, Min Feng, Lichun Wang, Ying Zhang, Yun Liao, Xiaolong Zhang, Qihan Li
We previously constructed a herpes simplex virus 1 (HSV-1) UL7 mutant virus (M1) and showed that a partial deletion mutation of the UL7 gene led to a lower proliferative rate and an attenuated phenotype. Using the M1 mutant, we further modified the UL41 gene, which encodes another tegument protein, and the latency-associated transcript (LAT) gene. Observations of the resulting mutants with modified UL7 and UL41 (M2) or UL7, UL41 and LAT (M3) genes indicated attenuated phenotypes, with lower proliferative ratios in various cells, non-lethal infections in mice and lower viral loads in nervous tissues compared with the wild-type strain...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/28840565/interplay-between-hepatitis-c-virus-and-arf4
#19
LETTER
Na Zhang, Youyang Ke, Leiliang Zhang
No abstract text is available yet for this article.
August 18, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/28861771/recombinant-rabies-virus-expressing-il-15-enhances-immunogenicity-through-promoting-the-activation-of-dendritic-cells-in-mice
#20
Tiange Chen, Yajing Zhang, Zhao Wang, Jie Yang, Mingming Li, Kunlun Wang, Min Cui, Zhen F Fu, Ling Zhao, Ming Zhou
Rabies remains a public health threat that kills approximately 59,000 people worldwide each year, most of which are from the developing countries of Africa and Asia where dog rabies are endemic. Therefore, developing an affordable and efficacious vaccine is crucial for rabies control in these countries. Interleukin (IL)-15, an immunoregulatory cytokine, is a pluripotent molecule with therapeutic potential, which targets many cell types and links the innate and adaptive immune system. In this study, IL-15 gene was cloned and inserted into the genome of a recombinant rabies virus (RABV) strain LBNSE (designated as LBNSE-IL15), and the effect of over-expression of IL-15 on the immunogenicity of RABV was investigated...
August 2017: Virologica Sinica
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