目的对合肥市乙肝感染孕妇母婴阻断结果进行分析,评价现行的产前阻断方式的有效性,为阻断乙肝病毒垂直传播提供依据。方法利用已经建立的合肥市乙肝感染孕妇监测系统,按照乙肝感染孕妇乙型肝炎病毒-DNA(hepatitis B virus-DNA,HBV-DNA)...目的对合肥市乙肝感染孕妇母婴阻断结果进行分析,评价现行的产前阻断方式的有效性,为阻断乙肝病毒垂直传播提供依据。方法利用已经建立的合肥市乙肝感染孕妇监测系统,按照乙肝感染孕妇乙型肝炎病毒-DNA(hepatitis B virus-DNA,HBV-DNA)滴度的风险区和产前是否注射乙肝免疫球蛋白分组,在婴儿一周岁时检测乙肝五项,乙肝表面抗原(hepatitis B surface antigen,HBs Ag)阳性者为阻断失败。同时对注射乙肝免疫球蛋白(hepatitis B immune globulin,HBIg)的乙肝感染孕妇进行注射前和注射后HBV-DNA病毒滴度监测,以研究产前注射乙肝免疫球蛋白对乙肝病毒垂直传播的影响。结果 2009-2013年全市共监测乙肝感染孕妇395例,对照组的阳性率为2.74%,阻断组的阳性率为3.88%。x^2检验显示两组间阳性率差异无统计学意义。注射HBIg的乙肝感染孕妇注射前和注射后HBV-DNA病毒滴度变化差异无统计学意义。结论乙肝感染孕妇产前注射乙肝免疫球蛋白的效果有待进一步研究。展开更多
目的了解安徽省某高校一起急性胃肠炎暴发疫情的病原体基因分型和分子特征。方法采用实时荧光定量PCR法（Real-time PCR）对6份粪便/肛拭子标本检测诺如病毒核酸,检出的阳性标本经传统RT-PCR扩增衣壳蛋白区（ORF2）部分序列、基因测序...目的了解安徽省某高校一起急性胃肠炎暴发疫情的病原体基因分型和分子特征。方法采用实时荧光定量PCR法（Real-time PCR）对6份粪便/肛拭子标本检测诺如病毒核酸,检出的阳性标本经传统RT-PCR扩增衣壳蛋白区（ORF2）部分序列、基因测序和型别鉴定,利用Clustal X 2.0和Mega 6.0软件对测定序列进行核苷酸同源性比对和构建基因进化和亲缘性关系树。结果检出4份标本诺如病毒核酸阳性,阳性率为66.67%（4/6）;基因序列比对和进化亲缘性关系显示：诺如病毒基因型为GII.4型;2毒株序列之间核苷酸同源性为100%;与2014~2015年上海株、香港株核酸同源性最高,均为100%;与2012澳大利亚Sydney株（JX459908）同源性为99.6%;与上海和香港两地区毒株亲缘性关系最近,聚为独立一簇,同属GII.4/Sydney 2012分支。结论引发该起急性胃肠炎暴发的病原体为GII.4型诺如病毒,且属于GII.4 Sydney 2012变异株。展开更多
[Objective]The research aimed to test and identify the physicochemical characters and antiviral activity in vitro of semi-finished product of the recombinant porcine rPoIFN-α. [Method]HEp-2/VSV system was used to tes...[Objective]The research aimed to test and identify the physicochemical characters and antiviral activity in vitro of semi-finished product of the recombinant porcine rPoIFN-α. [Method]HEp-2/VSV system was used to test the antiviral activity of three batches of rPoIFN-α. Using recombinant human IFN-α as reference,the titer of interferon was measured. The semi-finished product of rPoIFN-α with the known titer were treated with 0.25% trypsin,HCl and mouse anti-porcine IFN-α monoclonal antibody. And the anti-viral activity of each batch of rPoIFN-α was detected. The physicochemical characters of rPoIFN-α were evaluated. The inhibition of induced cytopathic effect of rPoIFN-α on PPV （Porcine parvovirus） and PRV （Porcine pseudorabies） on swine kidney cell （PK-15） was determined. And the antiviral activity of rPoIFN-α in vitro was observed. [Result]The titers of semi-finished products of rPoIFN-α titrated by HEp-2/VSV system could reach 1.5×105 IU/ml,with the specific activity of 1.1×106 IU/mg. The residual rate of the tier of rPoIFN-α treated by 0.25% trypsin at 37 ℃ for 1 h was less than 1%. And that treated with HCl （pH of 2.0） for 72 h was up to 95%. And that treated at 56 ℃ for 30 min and that treated by mouse anti-porcine IFN-α monoclonal antibody at 37 ℃ for 1 h were higher than 47% and about 1% respectively. The antiviral test in vitro showed that 50 and 500 IU/ml rPoIFN-α could inhibit the induced cytopathic effect of PRV and PPV on PK-15 cell lines. [Conclusion]rPoIFN-α had the basic physicochemical characters of IFN-α. And it could inhibit the induced cytopathic effect of PRV and PPV on PK-15 cell lines,but there was dosage difference.展开更多
文摘目的对合肥市乙肝感染孕妇母婴阻断结果进行分析,评价现行的产前阻断方式的有效性,为阻断乙肝病毒垂直传播提供依据。方法利用已经建立的合肥市乙肝感染孕妇监测系统,按照乙肝感染孕妇乙型肝炎病毒-DNA(hepatitis B virus-DNA,HBV-DNA)滴度的风险区和产前是否注射乙肝免疫球蛋白分组,在婴儿一周岁时检测乙肝五项,乙肝表面抗原(hepatitis B surface antigen,HBs Ag)阳性者为阻断失败。同时对注射乙肝免疫球蛋白(hepatitis B immune globulin,HBIg)的乙肝感染孕妇进行注射前和注射后HBV-DNA病毒滴度监测,以研究产前注射乙肝免疫球蛋白对乙肝病毒垂直传播的影响。结果 2009-2013年全市共监测乙肝感染孕妇395例,对照组的阳性率为2.74%,阻断组的阳性率为3.88%。x^2检验显示两组间阳性率差异无统计学意义。注射HBIg的乙肝感染孕妇注射前和注射后HBV-DNA病毒滴度变化差异无统计学意义。结论乙肝感染孕妇产前注射乙肝免疫球蛋白的效果有待进一步研究。
文摘目的了解安徽省某高校一起急性胃肠炎暴发疫情的病原体基因分型和分子特征。方法采用实时荧光定量PCR法（Real-time PCR）对6份粪便/肛拭子标本检测诺如病毒核酸,检出的阳性标本经传统RT-PCR扩增衣壳蛋白区（ORF2）部分序列、基因测序和型别鉴定,利用Clustal X 2.0和Mega 6.0软件对测定序列进行核苷酸同源性比对和构建基因进化和亲缘性关系树。结果检出4份标本诺如病毒核酸阳性,阳性率为66.67%（4/6）;基因序列比对和进化亲缘性关系显示：诺如病毒基因型为GII.4型;2毒株序列之间核苷酸同源性为100%;与2014~2015年上海株、香港株核酸同源性最高,均为100%;与2012澳大利亚Sydney株（JX459908）同源性为99.6%;与上海和香港两地区毒株亲缘性关系最近,聚为独立一簇,同属GII.4/Sydney 2012分支。结论引发该起急性胃肠炎暴发的病原体为GII.4型诺如病毒,且属于GII.4 Sydney 2012变异株。
基金Supported by Natural Science Research Project of Anhui Educational Committee (2004kj218 )Major Special Program of Science and Technology Grand Plan of Anhui Province (08010302179)~~
文摘[Objective]The research aimed to test and identify the physicochemical characters and antiviral activity in vitro of semi-finished product of the recombinant porcine rPoIFN-α. [Method]HEp-2/VSV system was used to test the antiviral activity of three batches of rPoIFN-α. Using recombinant human IFN-α as reference,the titer of interferon was measured. The semi-finished product of rPoIFN-α with the known titer were treated with 0.25% trypsin,HCl and mouse anti-porcine IFN-α monoclonal antibody. And the anti-viral activity of each batch of rPoIFN-α was detected. The physicochemical characters of rPoIFN-α were evaluated. The inhibition of induced cytopathic effect of rPoIFN-α on PPV （Porcine parvovirus） and PRV （Porcine pseudorabies） on swine kidney cell （PK-15） was determined. And the antiviral activity of rPoIFN-α in vitro was observed. [Result]The titers of semi-finished products of rPoIFN-α titrated by HEp-2/VSV system could reach 1.5×105 IU/ml,with the specific activity of 1.1×106 IU/mg. The residual rate of the tier of rPoIFN-α treated by 0.25% trypsin at 37 ℃ for 1 h was less than 1%. And that treated with HCl （pH of 2.0） for 72 h was up to 95%. And that treated at 56 ℃ for 30 min and that treated by mouse anti-porcine IFN-α monoclonal antibody at 37 ℃ for 1 h were higher than 47% and about 1% respectively. The antiviral test in vitro showed that 50 and 500 IU/ml rPoIFN-α could inhibit the induced cytopathic effect of PRV and PPV on PK-15 cell lines. [Conclusion]rPoIFN-α had the basic physicochemical characters of IFN-α. And it could inhibit the induced cytopathic effect of PRV and PPV on PK-15 cell lines,but there was dosage difference.
