Antiviral Res:中山大学曹永长教授研究团队发表H7N9流感病毒广谱疫苗研究进展

2017-04-25 佚名 生物帮

日前,国际学术期刊《antiviral Research》在线发表了中山大学有害生物控制与资源利用国家重点实验室曹永长教授团队在国际抗病毒权威期刊《Antiviral Research》上发表了题目为“A recombinant H7N9 influenza vaccine with the H7 hemagglutinin transmembrane domain replaced by the

日前,国际学术期刊《antiviral Research》在线发表了中山大学有害生物控制与资源利用国家重点实验室曹永长教授团队在国际抗病毒权威期刊《Antiviral Research》上发表了题目为“A recombinant H7N9 influenza vaccine with the H7 hemagglutinin transmembrane domain replaced by the H3 domain induces increased cross-reactive antibodies and improved interclade protection in mice”的研究论文,报道了一种对血凝素蛋白(Hemagglutinin,HA)进行结构设计的H7N9流感病毒全病毒灭活疫苗,并且证明这种全病毒灭活疫苗可以刺激机体产生H7N9亚型内广谱交叉免疫反应和交叉保护。博士研究生王洋为本文第一作者,曹永长教授为本文通讯作者。

自2013年3月我国首次报道H7N9流感病毒感染人以来,H7N9流感病毒已经经历了5波流行,感染病例1364例(截至2017年4月1日),死亡率达30%。H7N9流感病毒不仅具有潜在大流行的威胁,也对养禽业造成了巨大的损失。跟其他流感病毒一样,H7N9流感病毒变异十分迅速,已经形成了多个基因型,因此研制具有广谱交叉保护效果的H7N9流感病毒疫苗十分必要。

曹永长教授团队之前的研究证实H3亚型HA蛋白跨膜区(Transmembrane domain,TM)与HA蛋白稳定性、HA蛋白交叉免疫原性关系密切,通过HA跨膜区置换策略可以提高三聚化H1、H5和H9亚型HA蛋白的亚型间交叉保护力。在H7N9广谱疫苗的研究中,该团队将H7N9流感病毒HA蛋白TM置换为H3亚型HA TM,并通过反向遗传技术拯救出包含TM置换的重组H7N9流感病毒。在小鼠动物模型中,重组病毒制备的全病毒灭活疫苗能够诱导机体产生针对不同分支毒株抗原的更高的HI抗体、HA特异性IgG抗体、HA特异性IFN-γ细胞因子。该疫苗能够对小鼠同源或异源H7N9病毒攻毒提供完全保护,经过免疫的小鼠在攻毒后检测不到肺病毒滴度、无明显肺部病变和炎症反应。

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人感染H7N9禽流感病毒的发病率终于下降了。截止到2017年3月22日,全球共报告确诊的人感染H7N9禽流感1349例,死亡497例。除3例外,其余均发生在我国。那么,H7N9禽流感病毒是从哪里来的呢?让我们听H7N9禽流感病毒自己是怎样说的吧!点击查看原图哈罗,人类!我是近5年才出名的禽流感病毒H7N9。自2013年至今年的2月22日,你们人类已经确诊了我们导致的人感染病例1230例,死亡428