病毒非结构蛋白质类

病毒非结构蛋白质类的相关文献在2001年到2019年内共计55篇,主要集中在基础医学、内科学、肿瘤学 等领域,其中期刊论文54篇、会议论文1篇、专利文献2130340篇;相关期刊28种,包括中华预防医学杂志、中国医药生物技术、中华病理学杂志等; 相关会议1种,包括第三次全国免疫诊断暨疫苗学术研讨会等;病毒非结构蛋白质类的相关文献由226位作者贡献,包括成军、刘妍、龚国忠等。

病毒非结构蛋白质类—发文量

期刊论文>

论文:54 占比:0.00%

会议论文>

论文:1 占比:0.00%

专利文献>

论文:2130340 占比:100.00%

总计:2130395篇

病毒非结构蛋白质类—发文趋势图

病毒非结构蛋白质类

-研究学者

  • 成军
  • 刘妍
  • 龚国忠
  • 王琳
  • 纪冬
  • 张玲霞
  • 张黎颖
  • 洪源
  • 白桂芹
  • 秦成峰

病毒非结构蛋白质类

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    • Mao Qianyi
    • 摘要: IFN-α/β是机体对抗外来病原体的第一道防线,其产生和后续激活的细胞信号转导可诱导具有抑制病毒感染和复制作用的IFN刺激基因的表达.然而,大多数病毒可通过表达一种或多种蛋白抵抗宿主细胞的抗病毒反应.流感病毒非结构蛋白1 (nonstructural protein 1,NS1)作为多功能毒力因子,在流感病毒感染过程中起重要作用.此文概述了NS1的结构与功能及抑制IFN-α/β产生和抗病毒效应作用的机制,为研究流感病毒致病机制提供参考.%The host IFN-α/β response is a critical first line defense against foreign pathogens.IFN-α/β production and subsequent activation of cell signaling transduction result in the expression of antiviral IFN-stimulated genes whose products inhibit virus infection and replication.However,most viruses can express one or several proteins that counter the antiviral defenses of host cell.The multifunctional virulence factor,nonstructural protein 1 (NS1) of influenza virus,has an important role in virus infection.This review summarizes the structure and function of NS1 and highlights the mechanism by which NS1 suppresses IFN-α/β production and subsequent antiviral effect,and provides references for the research of influenza virus pathogenesis.
    • 杨泽宁; 黄星; 储曼曼; 刘龙丁; 郑惠文; 李嘉祺; 李洪哲; 郭磊; 王晶晶; 李恒; 宁若彤; 范海涛
    • 摘要: 目的 利用生物信息学的方法,探究不同亚型肠道病毒-D68型(EV-D68)的3C和3D非结构蛋白序列及结构是否存在差异.方法 通过将近年来世界各国EV-D68流行株(主要为中国株和美国株)的VP1核酸序列进行比对,利用邻接法(Neighbor-Joining)构建系统进化树进行分型,选取各型的代表株,利用其3C和3D蛋白的核酸序列构建进化树并同时利用其氨基酸序列进行同源建模,以进行蛋白质结构分析.结果 通过分析发现,EV-D68 Clade A、CladeB亚型毒株3D蛋白的三级结构均相同;而在3C蛋白的三级结构中,Clade B1亚型的毒株与Clade A、Clade B2和CladeB3亚型毒株存在差异.结论 3C蛋白的三级结构上的差异可能导致EV-D68 Clade B1亚型毒株的毒力和致病性高于Clade A、Clade B2和Clade B3亚型毒株.%Objective Using bioinformatics method,we explored the sequence and structure differences in 3C and 3D nonstructural proteins of different clades of EV-D68 (enteric virus D68).Methods The VP1 nucleic acid sequences of the popular strains (mainly Chinese strains and American strains) in the world in recent years were compared,by using the Adjacency method (NeighborJoining) to construct the phylogenetic tree.Also,we selected the representative strains of each type to construct the evolutionary tree of 3C,3D nucleic acid sequences,and used their amino acid sequence to do the structural analysis by homologous modeling.Results The results showed that the tertiary structure of the 3D proteins of clade A and clade B were the same for EV-D68,while the clade B1 was different from the clade A,clade B2 and clade B3 in the tertiary structure of 3C protein.Conclusions The difference of the tertiary structure of 3C protein may lead to the higher virulence and pathogenicity of clade B1 than clade A,clade B2 and clade B3.
    • 薛雄燕; 朱嫦琳; 潘练华; 黄少珍; 李炜煊
    • 摘要: 目的:比较3种不同初筛方法对登革热的诊断价值,并探讨各种方法的应用范围及应用价值。方法采用回顾性研究。收集2014年及2015年9至10月佛山市第一人民医院门诊及住院共2137例疑似登革热病毒感染者的临床资料,同时采用ELISA法和快速法检测(血清标本)登革热病毒NS1抗原,采用快速法检测登革热病毒IgM抗体,并采用卡方(χ2)检验比较这3种方法对登革热的初筛价值。另对2015年确诊的48例,分别在发病第1~3天、4~5天、6~7天及14天同时采用3种方法进行检测,观察不同时间段3种方法的灵敏度和特异度变化。结果2014年1674例疑似病例中被确诊为登革热的有957例(57.2%),2015年463例中确诊的有48例(10.4%),共计1005例(47.0%)。3种方法对登革热的检出性能比较结果显示,NS1-ELISA方法灵敏度优于NS1抗原快速检测法和IgM抗体快速检测法(χ2=40.865,P<0.001;χ2=151.383,P<0.001),3种方法特异度相当,差异无统计学意义(χ2=0.661,P=0.416;χ2=0.548,P=0.459;χ2=2.397,P=0.122)。检测NS1抗原的2种方法发病7 d内灵敏度均较好,而检测IgM抗体的方法则随着时间推移灵敏度上升。结论 NS1抗原检测在疾病发生早期灵敏度和特异度良好,优于IgM抗体检测,可作为登革热早期筛查的重要方法,在登革热发病7 d内可根据登革热疫情情况选择ELISA方法或快速检测法。(中华检验医学杂志,2016,39:776-779)%Objective To compare and evaluate the performance and applications of three assays in preliminary screening of dengue infections.Methods This study was designed as a retrospective study.Clinical data were obtained from 2 137 borderline cases from September to October in 2014 and 2015.Markers of dengue infections of serum samples were detected by NS1 antigen captured ELISA, dengue NS1 detect rapid test and dengue IgM detect rapid test, respectively.Chi square test was used to compare the preliminary screening value of these 3 methods.Forty-eight diagnosed patients were also examined in the 1st-3rd day, 4th-5th day, 6th-7th days and 14th day after infection to access the sensitivities and specificities of three assays.Results Nine hundred and fifty-seven ( 57.2%) cases in 2014 and 48 ( 10.4%) cases in 2015 were diagnosed to be Dengue fever of 2 137 borderline cases.The overall sensitivity of NS1-ELISA was superior to NS1 and IgM rapid detect test (χ2 =40.865,P<0.001;χ2 =151.383,P<0.001).No significant differences were found in specificity between three assays(χ2 =0.661,P=0.416;χ2 =0.548,P=0.459; χ2 =2.397,P=0.122).The NS1 detecting assays were sensitive in 7 days after infection, but the sensitivity of IgM detecting assay increased over time.Conclusions NS1 detecting assays had good sensitivities and specificities, which can be used as an important method in preliminary screening of dengue infection.ELISA or rapid test can be selected according to epidemic situation.
    • 蒋孝华; 谢玉桃; 张冬翠; 雷创; 刘玲玲
    • 摘要: Objective To investigate the effect of hepatitis C virus (HCV) core protein and nonstructural protein 4B(NS4B) on the proliferation of HepG2 cells and its possible mechanism.Methods The two recombinant plasmid pcDNA3.1 (-)Core and pcDNA3.1 (-) NS4B were transiently transfected respectively and co-transfected into HepG2 cells by lipofectamine, simultaneously HepG2 cells transfected with pcDNA3.1 (-) and untransfected HepG2 cells were used as control.The expression of mRNA and protein of HCV Core,NS4B,Wnt1,β-catenin,c-myc and CyclinDl in the cells of each group were detected by RT-PCR and Western blot respectively.Cell proliferation changes were measured by MTT assay and plate colony formation assay.The cell cycle distribution was tested by flow cytometry.Results ①HCV Core or/and NS4B mRNA and protein were expressed successfully in the HepG2 cells transfected with pcDNA3.1 (-)Core,pcDNA3.1 (-)NS4B alone or in combination.② The relative expression levels of mRNA and protein of Wnt1,β-catenin,c-myc and CyclinD1 were higher in the cells transfected with pcDNA3.1 (-) Core,pcDNA3.1 (-) NS4B alone or in combination than those in the cells transfected with pcDNA3.1 (-) and untransfected HepG2 cells(P <0.01).③Compared with the HepG2 cells transfected with pcDNA3.1 (-)and untransfected,cell viability,cloning efficiency and the percentage of cells at S and G2/M phases were significantly increased in the cells transfected with pcDNA3.1 (-) Core,pcDNA3.1 (-) NS4B alone or in combination (P < 0.01).Conclusion HCV core protein and NS4B can accelerate cell cycle progression and promote cell proliferation of HepG2 cells probably through enhancement of Wntl,β-catenin,c-myc and CyclinD1 expression.%目的 探讨HCV核心蛋白与非结构蛋白4B(NS4B)对HepG2细胞增殖的影响及可能机制.方法 重组质粒pcDNA3.1(-)Core与pcDNA3.1(-)NS4B单独和联合转染HepG2细胞,同时以转染空载体和未转染HepG2细胞作为对照.RT-PCR及Western Blot检测各组细胞中HCVCore、NS4B 、Wnt1、β-catenin 、c-myc及CyclinD1表达;MTT法,平板克隆形成试验检测HCV核心蛋白与NS4B对HepG2细胞增殖的影响;流式细胞术检测细胞周期.结果 ①pcDNA3.1(-)Core与pcDNA3.1(-)NS4B单独和联合转染HepG2细胞,成功表达HCV Core或/(和)NS4B mRNA和蛋白.②pcDNA3.1(-)Core和pcDNA3.1(-)NS4B单独转染和联合转染的HepG2细胞Wnt1、β-catenin、c-myc、CyclinD1 mRNA与蛋白的相对表达量均高于HepG2/pcDNA3.1(-)组和HepG2组(P<0.01).③与HepG2/pcDNA3.1(-)组和HepG2组比较,pcDNA3.1(-)Core和pcDNA3.1(-) NS4B单独转染和联合转染的HepG2细胞活力和克隆形成能力增强,S期和G2/M期细胞比例升高(P<0.01).结论 HCV核心蛋白与NS4B能加速HepG2细胞周期进程,促进细胞增殖,这种效应可能与其增强Wnt1、β-catenin、c-myc及CyclinD1的表达相关.
    • 彭米林; 肖新强; 蒋永芳; 田沂; 许允; 张旻; 王文龙; 彭锋; 龚国忠
    • 摘要: 目的 本研究拟探讨HCV非结构蛋白5A(NS5A)对HIV长末端重复序列(long terminal repeat,LTR)影响,从而为HCV对HIV的影响提供实验依据.方法 将构建的LTR启动子驱动的荧光素酶(Luc)报告基因表达质粒(pGL3-LTR-Luc)和含HCVNS5A基因的表达质粒pCNS5A共转染肝癌细胞株(Huh7细胞),采用免疫细胞化学技术、Westem Blot及逆转录聚合酶链反应检测HCV NS5A蛋白及mRNA的表达;本实验分三组,将质粒pGL3-LTR-Luc(空白组)、质粒pRc/CMV+ pGL3-LTR-Luc(对照组)、质粒pCNS5A+ pGL3-LTR-Luc(实验组)分别转染Huh7细胞,48 h后收集细胞,采用Luc活性检测LTR的活性,以观察HCVNS5A对LTR的调控影响.所得荧光活性值以均数±标准差表示,采用Levene’s方差齐性检验,多组间比较采用单因素方差分析,两两比较行LSD-t检验.结果 转染pcNS5A质粒的Huh7细胞质经RT-PCR及Westem Blot检测,HCV NS5A mRNA及蛋白在细胞中获得表达.方差分析结果提示LTR荧光活性在三组间有明显的差异(F=7.876,P=0.002),进一步比较各组间的差异,结果提示共转染质粒pcNS5A+pGL3-LTR-Luc组的Huh7细胞中Luc相对活性(22 476±4471)明显高于单转染pGL3-LTR-Luc组(15 887±3039,P=0.002)及共转染质粒pRc/CMV+ pGL3-LTR-Luc组(16 321±4162,P=0.008),差异有统计学意义.结论 表达HCV NS5A的质粒pCNS5A成功转染至Huh7细胞;HCV NS5A蛋白能激活HIV LTR,提示HCV NS5A可能为HCV促进HIV复制的分子机制之一.
    • 陈姝樾
    • 摘要: Several large-scale outbreaks and epidemics of hand,foot and mouth disease caused by enterovirus 71 (EV71) and coxsackievirus A16 in the world have become a major threat to infant health.Research on molecular biological characteristics of EV71 structure is fundanmental to the development of EV71 vaccine.This review summarizes the research progress in biological characteristics of structural proteins and non-structural proteins of EV71.%肠道病毒71型(enterovirus 71,EV71)和柯萨奇病毒A组16型感染导致的手足口病已在世界范围内引起数次大规模暴发和流行,成为婴幼儿健康的重大威胁.对EV71结构的分子生物学特征的研究有助于为EV71疫苗的研发提供重要依据,此文就EV71的几种重要结构蛋白和非结构蛋白在病毒感染过程中作用的研究现状做一综述.
    • 金博; 李楠; 吴凯; 张林; 王艳梅; 翟俊山; 朱超慧; 宋久刚
    • 摘要: Objective To select murine T cell epitope of HCV NS3.Methods Femalebalb/c mice were vaccinated by recombinant HCV NS3 protein adjuvanted by poly(Ⅰ∶C)and Montanide ISA 720 or CpG ODN and Montanide ISA 720.Splenocytes from vaccinated mice were stimulated by a variety of peptide pools composed of synthetic overlapped peptides covering the whole gene of HCV NS3.ELISPOT and flow cytometry were applied to identify the peptide pools that produced most abundant IFN-γ spot forming units and/or CD8 +/IFN-γ + or CD4 + /IFN-γ+ cell ratios.Results HCV NS3 peptide pools that produced the most abundant IFN-γ spot forming units were selected by ELISPOT and the highest splenocyte ratio of CD8 +/IFN-γ + or CD4 +/IFN-γ+ cell by flow cytometry.The epitope sequences were retrieved in the peptide pool composition matrix.One peptide sequenced as GGCSGGAYDⅢCDECHS was selected as one of the mice T cell epitopes and further confirmed by ELISPOT assay and flow cytometry.Conclusion The identification of HCV NS3 mice T cell epitope facilitates the subsequent study for HCV vaccine development.%目的 筛选HCV NS3的小鼠T细胞表位多肽序列.方法 BALB/c小鼠用HCV NS3加po-ly (I∶C)或CpG ODN及Montanide ISA720佐剂免疫后,分离其脾淋巴细胞,以覆盖HCV NS3全基因的合成重叠多肽组成的不同多肽库进行刺激,以ELISPOT及流式细胞术检测分泌干扰素γ(IFN-γ)的细胞数及CD8+/IFN-γ+细胞或CD4 +/IFN-γ+细胞百分比,确定抗原性最强的多肽库,找出HCV NS3的小鼠T细胞表位多肽.结果 通过ELISPOT及流式细胞术检测,能够刺激淋巴细胞分泌IFN-γ最多及CD8 +/IFN-γ+细胞或CD4+/IFN-γ+细胞百分比最高的多肽被选出作为阳性多肽,其中的一个多肽经进一步的ELISPOT及流式细胞术检测确认,其序列为GGCSGGAYDⅢCDECHS.结论 HCV NS3小鼠T细胞表位序列的确定为HCV疫苗的研究打下了基础.
    • 赵笛; 蔡晨雯; 刘炯; 萧树东; 郑青
    • 摘要: 目的 探讨细小病毒H-1非结构蛋白1(NS1)基因对人胃癌细胞的抑制作用及其可能的机制.方法 构建表达增强型绿色荧光蛋白(eGFP)标记的NS1重组质粒(peGFP-C1-NS1),分别使用peGFP-C1-NS1(实验组)或空载体质粒(peGFP-C1,阴性对照组)转染人胃癌SGC7901细胞株,空白对照组则予等量磷酸盐缓冲液处理.转染后在荧光显微镜下观察细胞内荧光信号分布,检测NS1基因及蛋白表达情况.绘制细胞生长曲线,检测细胞衰老相关β-半乳糖苷酶(SA-β-Gal)的表达,并使用流式细胞仪分析细胞周期分布变化.两组间比较行t检验.结果 转染peGFP-C1-NS1后SGC7901细胞表达NS1基因及蛋白,与阴性对照组相比,实验组细胞荧光信号集中于细胞核内.实验组SA-β-Gal阳性细胞比例[(30.5±1.4)%]高于阴性对照组[(4.4±1.1)%],差异有统计学意义(t=-12.931,P<0.01).转染peGFP-C1-NS1后1、2、3、4 d SGC7901细胞的抑制率分别为45%、62%、73%、77%.表达eGFP-NS1融合蛋白的SGC7901细胞细胞周期被阻滞于G0/G1期.结论 细小病毒H-1 NS1在胃癌SGC7901细胞核内发挥作用,可将细胞周期阻滞于G0/G1期,有效抑制SGC7901细胞生长.%Objective To investigate the suppression effect of expressing parvovirus H-1 nonstructural protein 1 (NS1) gene on human gastric cancer cells and the possible mechanisms.Methods A recombinant enhanced green fluorescent protein (eGFP) labeled NS1 of parvovirus H-1 plasmid was constructed.Human gastric cancer cell line SGC7901 was transfected with recombinant plasmid (experiment group) or blank vector (negative control group) and blank control group was treated with equal amount of phosphate buffered saline (blank control group).After transfection,the distribution of fluorescent signal was observed under fluorescent microscope.The expression of NS1 at gene and protein level was measured.Cell growth curve of each group was drawn.The expression of cell senescence-associated β-galactosidase (SA-β-Gal) was tested.The changes of cell cycle were investigated by flowcytometry.Two groups' comparision was performed by t-test.Results After transfection,NS1 was expressed in SGC7901 cells at gene and protein level.Compared with negative control group,the fluorescent signal accumulated in cell nucleus in experiment group.The percentage of SA-β-Gal positive cell in experiment group ((30.5 ± 1.4) %) was higher than that of negative control group ((4.4± 1.1) %) and the difference was statistically significant (t =-12.931,P < 0.01).The growth inhibition rate of SGC7901 cells from the first day to the fourth day was 45%,62%,73% and 77%,respectively.The cell cycle of eGFP-NS1 expressed SGC7901 cells was arrested at G0/G1 phase.Conclusion Parvovirus H-1 NS1 play the role in cell nucleus of gastric cancer cell line SGC7901 and could make cell cycle arrested at G0/G1 phase,which effectively inhibited the proliferation SGC7901 cell.
    • 董金玲; 高萍; 刘顺爱; 王琦; 张锦前; 成军
    • 摘要: 目的探讨丙型肝炎病毒(HCV)core、NS3、NS5A对内源性IFN-β表达的影响及其调控机制.方法将HCV core、NS3、NS5A表达载体pcDNA3.1/myc-His-core/NS3/NS5A转染至HepG2细胞,验证蛋白表达之后,采用实时荧光定量PCR和Western blot及ELISA方法观察3种蛋白对IFN-βmRNA及蛋白水平表达的影响.构建IFN-β全长启动子报告基因表达载体,借助双萤虫素酶活性检测,探讨HCV core、NS3、NS5A对IFN-β转录水平的调控机制.结果 pcDNA3.1/myc-His-core/NS3/NS5A在HepG2细胞中成功表达,与转染pcDNA3.1/myc-His空载体相比,pcDNA3.1/myc-His-NS3/NS5A过表达时,在mRNA及蛋白水平均能抑制HepG2细胞内IFN-β的表达,与转染空载体的对照组相比,差异有统计学意义(P <0.05).双萤虫素酶活性检测显示,转染IFN-β全长启动子报告基因表达质粒后,与对照组相比,双萤虫素酶活性降低,差异有统计学意义(P<0.05).pcDNA3.1/myc-His-core过表达时对IFN-β的表达无明显影响.结论HCV NS3/NS5A在mRNA及蛋白水平能抑制IFN-β表达,并通过其转录水平影响IFN-β表达, core对IFN-β的表达无明显影响.其具体调控机制有待进一步研究.%Objective To investigate the effects and regulation mechanism of HCV core/NS3/NS5A on expression of IFN-βin HepG2 cells. Methods HCV core/NS3/NS5A proteins were cloned (pcDNA3.1/myc-His-core/NS3/NS5A) and expressed in HepG2 cells, then the expression level of IFN-β was detected by qRT-PCR, Western blot hybridization and ELISA. IFN-β promoter reporter vector (PGL4.10-IFN-β-P) was constructed and used for regulation mechanism study by luciferase assay. Results HCV core/NS3/NS5A proteins were successfully expressed in HepG2 cells post-transfection. Both the mRNA level and protein expression of IFN-βwere significantly decreased (P<0.05) in the presence of NS3/NS5A protein. Luciferase assay revealed that NS3/NS5A proteins downregulated IFN-βpromoter activity (P < 0.05). Meanwhile, HCV core protein had no significant effect on IFN-βexpression. Conclusions Overexpression of NS3/NS5A could inhibit the expression of IFN-βby downregulating IFN-βpromoter activity.
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