目的运用免疫信息学技术预测严重急性呼吸综合征冠状病毒2(SARS-CoV-2)的B细胞、细胞毒性T淋巴细胞(CTL)和辅助T(Th)细胞的抗原表位.方法从NCBI数据库检索SARS-CoV-2蛋白序列,根据抗原性≥0.5和氨基酸数≥100进行筛选,最终的蛋白序列用...目的运用免疫信息学技术预测严重急性呼吸综合征冠状病毒2(SARS-CoV-2)的B细胞、细胞毒性T淋巴细胞(CTL)和辅助T(Th)细胞的抗原表位.方法从NCBI数据库检索SARS-CoV-2蛋白序列,根据抗原性≥0.5和氨基酸数≥100进行筛选,最终的蛋白序列用于后续的抗原肽的预测.用蛋白质结构预测软件Phyre2进行三维结构的预测、蛋白质模型结构的细化软件GalaxyRefine优化蛋白的三维结构,最后用蛋白质结构同源建模SWISS-MODEL系统对优化后的结构进行准确性评估.蛋白序列用于CTL、Th细胞和线性B细胞抗原肽预测,三维结构用于结构性B细胞抗原预测.免疫表位数据库和分析资源(IEDB)预测SARS-CoV-2的CTL和Th细胞抗原表位,B细胞线性抗原肽预测软件Bepipred Linear Epitope Prediction 2.0和B细胞结构抗原肽预测软件ElliPro-Epitope prediction based upon structural protrusion分别预测B细胞线性和结构抗原肽.结果从NCBI数据库获得了27个SARS-CoV-2的蛋白序列,去掉抗原性<0.5和氨基酸数<100的蛋白质后,最终选定9个蛋白进行后续抗原肽预测.最终获得了24个CTL、20个Th细胞、12个B细胞线性表位和16个B细胞结构表位.结论获得的抗原表位可用于后续多表位疫苗的设计,相较于只针对单种蛋白靶点的抗原表位而言,多靶点抗原表位具有更强的免疫原性,这些抗原表位对SARS-CoV-2疫苗而言,具有一定的参考价值.展开更多
2019年末我国武汉爆发了自2003年的SARS-CoV和2012年的中东呼吸综合症(MERS)以来又一次冠状病毒大规模爆发流行。截至2020年10月09日20时,世界卫生组织(World Health Organization, WHO)数据显示海外累计确诊病例36,725,069例,死亡病例1...2019年末我国武汉爆发了自2003年的SARS-CoV和2012年的中东呼吸综合症(MERS)以来又一次冠状病毒大规模爆发流行。截至2020年10月09日20时,世界卫生组织(World Health Organization, WHO)数据显示海外累计确诊病例36,725,069例,死亡病例1,062,153例,中国确诊人数达到了91,264例。此次疫情的严重性自然引起国人联想到2003年爆发的SARS病毒。且最新研究认为SARS-CoV-2是SARS-CoV的姊妹病毒,具有高度的同源性。因此我们将围绕SARS-CoV-2和SARS-CoV之间的联系以及SARS-CoV-2的最新诊疗方案进行简要综述。展开更多
SARS virus spike gene fra gment was expressed by Ecoli expr ession systemThe fragment enclose s major neutralization epitope of the virusThe expressed protein wa s purified and an ELISA method was set upBy...SARS virus spike gene fra gment was expressed by Ecoli expr ession systemThe fragment enclose s major neutralization epitope of the virusThe expressed protein wa s purified and an ELISA method was set upBy using the recombinant,tw elve patients’ sera were detected The recombinant SARS coronavirus s pike protein offers an efficient wa y for serological diagnosis and is useful for epidemiological survey and vaccin e展开更多
SARS coronavirus N gene w as expressed by Ecoli expression systemThe expressed protein was p urified and an ELISA method was se t up for detection of SARS virus i nfected patient’s serum antibodyT he recomb...SARS coronavirus N gene w as expressed by Ecoli expression systemThe expressed protein was p urified and an ELISA method was se t up for detection of SARS virus i nfected patient’s serum antibodyT he recombinant SARS coronavirus N protein offers an efficient way fo r serological diagnosis and is use ful for epidemiological study and vaccine展开更多
To investigate the k inetics of antibody to SARS coronavirus in SARS patients and its clinical implication,ELISA was used to dete ct antibody to SARS coronavirus(SA RS CoV),RT-PCR was used to detect the SARS CoV RNA a...To investigate the k inetics of antibody to SARS coronavirus in SARS patients and its clinical implication,ELISA was used to dete ct antibody to SARS coronavirus(SA RS CoV),RT-PCR was used to detect the SARS CoV RNA and,besides,the C D+4 and CD+8 T cells in peripheral blood of SARS patients and healthy controls were assayed by flowcytom etryThe results showed that SARS CoV IgM were first detected from da y 7 to day 47 after SARS onset,wit h average at day 193±101SARS Co V IgG were first detected from day 4 to day 47 after SARS onset,with average at day 207±101,and the p roduction of SARS CoV IgG was corr elated with CD+4 T cell number(P<005),but had no relationship with SARS CoV RNAMost SARS patients pr oduced SARS CoV antibody,IgM produ ced almost at the same time wit h IgGSARS CoV IgG is a protective antibody against SARS CoV and the titer of IgG may be used as an ind ex indicating the specific immunit y production in SARS展开更多
文摘目的运用免疫信息学技术预测严重急性呼吸综合征冠状病毒2(SARS-CoV-2)的B细胞、细胞毒性T淋巴细胞(CTL)和辅助T(Th)细胞的抗原表位.方法从NCBI数据库检索SARS-CoV-2蛋白序列,根据抗原性≥0.5和氨基酸数≥100进行筛选,最终的蛋白序列用于后续的抗原肽的预测.用蛋白质结构预测软件Phyre2进行三维结构的预测、蛋白质模型结构的细化软件GalaxyRefine优化蛋白的三维结构,最后用蛋白质结构同源建模SWISS-MODEL系统对优化后的结构进行准确性评估.蛋白序列用于CTL、Th细胞和线性B细胞抗原肽预测,三维结构用于结构性B细胞抗原预测.免疫表位数据库和分析资源(IEDB)预测SARS-CoV-2的CTL和Th细胞抗原表位,B细胞线性抗原肽预测软件Bepipred Linear Epitope Prediction 2.0和B细胞结构抗原肽预测软件ElliPro-Epitope prediction based upon structural protrusion分别预测B细胞线性和结构抗原肽.结果从NCBI数据库获得了27个SARS-CoV-2的蛋白序列,去掉抗原性<0.5和氨基酸数<100的蛋白质后,最终选定9个蛋白进行后续抗原肽预测.最终获得了24个CTL、20个Th细胞、12个B细胞线性表位和16个B细胞结构表位.结论获得的抗原表位可用于后续多表位疫苗的设计,相较于只针对单种蛋白靶点的抗原表位而言,多靶点抗原表位具有更强的免疫原性,这些抗原表位对SARS-CoV-2疫苗而言,具有一定的参考价值.
文摘2019年末我国武汉爆发了自2003年的SARS-CoV和2012年的中东呼吸综合症(MERS)以来又一次冠状病毒大规模爆发流行。截至2020年10月09日20时,世界卫生组织(World Health Organization, WHO)数据显示海外累计确诊病例36,725,069例,死亡病例1,062,153例,中国确诊人数达到了91,264例。此次疫情的严重性自然引起国人联想到2003年爆发的SARS病毒。且最新研究认为SARS-CoV-2是SARS-CoV的姊妹病毒,具有高度的同源性。因此我们将围绕SARS-CoV-2和SARS-CoV之间的联系以及SARS-CoV-2的最新诊疗方案进行简要综述。
文摘SARS virus spike gene fra gment was expressed by Ecoli expr ession systemThe fragment enclose s major neutralization epitope of the virusThe expressed protein wa s purified and an ELISA method was set upBy using the recombinant,tw elve patients’ sera were detected The recombinant SARS coronavirus s pike protein offers an efficient wa y for serological diagnosis and is useful for epidemiological survey and vaccin e
文摘SARS coronavirus N gene w as expressed by Ecoli expression systemThe expressed protein was p urified and an ELISA method was se t up for detection of SARS virus i nfected patient’s serum antibodyT he recombinant SARS coronavirus N protein offers an efficient way fo r serological diagnosis and is use ful for epidemiological study and vaccine
文摘To investigate the k inetics of antibody to SARS coronavirus in SARS patients and its clinical implication,ELISA was used to dete ct antibody to SARS coronavirus(SA RS CoV),RT-PCR was used to detect the SARS CoV RNA and,besides,the C D+4 and CD+8 T cells in peripheral blood of SARS patients and healthy controls were assayed by flowcytom etryThe results showed that SARS CoV IgM were first detected from da y 7 to day 47 after SARS onset,wit h average at day 193±101SARS Co V IgG were first detected from day 4 to day 47 after SARS onset,with average at day 207±101,and the p roduction of SARS CoV IgG was corr elated with CD+4 T cell number(P<005),but had no relationship with SARS CoV RNAMost SARS patients pr oduced SARS CoV antibody,IgM produ ced almost at the same time wit h IgGSARS CoV IgG is a protective antibody against SARS CoV and the titer of IgG may be used as an ind ex indicating the specific immunit y production in SARS
