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Nature :H7N9禽流感病毒分离物研究

2013-07-26 Nature Nature

2013年2月H7N9禽流感病毒在中国大陆人群中出现,到7月的第一个星期,世界卫生组织已记录到133个病例,其中包括43个死亡病例。迄今为止大部分病例都被发现与活禽市场有关。在本期Nature上,两个小组报告了H7N9的受体结合性质。这两个小组都发现,该病毒已获得了结合人“2,3-linked唾液酸受体”的能力,但却保留了与禽“2,3-linked受体”相结合的偏好,后者是一个可能限制其朝向在人类

2013年2月H7N9禽流感病毒在中国大陆人群中出现,到7月的第一个星期,世界卫生组织已记录到133个病例,其中包括43个死亡病例。迄今为止大部分病例都被发现与活禽市场有关。在本期Nature上,两个小组报告了H7N9的受体结合性质。这两个小组都发现,该病毒已获得了结合人“2,3-linked唾液酸受体”的能力,但却保留了与禽“2,3-linked受体”相结合的偏好,后者是一个可能限制其朝向在人类之间高效传播进一步演化的因子。Steven Gamblin及其同事还解决了H7血凝素在与受体类似物所形成的复合物中的晶体结构,揭示了“人受体结合性质”有可能怎样出现的详细情况。Yuelong Shu及其同事研究了肺组织中的病毒感染模式。在人类气管和肺移植物中,该病毒感染下呼吸道中的上皮细胞和肺泡中的II-型肺细胞,与气管相比能更好地在下呼吸道中复制,这可能是它迄今不能在人与人之间进行高效传播的一个因素。他们还报告了在一些患者中所发现的“高细胞因子血症”(它是一种“细胞因子风暴”,对疾病的严重程度会有贡献),与在一些H5N1感染中所见的这种血症具有可比性。

Zhou J, Wang D, Gao R, Zhao B, Song J, Qi X, Zhang Y, Shi Y, Yang L, Zhu W, Bai T, Qin K, Lan Y, Zou S, Guo J, Dong J, Dong L, Zhang Y, Wei H, Li X, Lu J, Liu L, Zhao X, Li X, Huang W, Wen L, Bo H, Xin L, Chen Y, Xu C, Pei Y, Yang Y, Zhang X, Wang S, Feng Z, Han J, Yang W, Gao GF, Wu G, Li D, Wang Y, Shu Y.Biological features of novel avian influenza A (H7N9) virus.Nature. 2013 Jul 3. doi: 10.1038/nature12379.

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    2014-05-12 liye789132251
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中国科学家6月24日在线发表于《柳叶刀》上的研究论文称,H7N9禽流感患者死亡风险远低于人感染H5N1禽流感,但高于季节性流感和甲型H1N1流感。 具有100多年历史的世界著名医学期刊《柳叶刀》杂志,24日同时在线发表了两篇由中国疾控中心和香港大学科学家合作完成的最新研究论文。其中,《人感染A(H7N9)禽流感病毒临床严重性评估》一文提出,人感染H7N9禽流感住院患者死亡风险为36%,临床严重性

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