ipsvirus 发表于 2015-7-22 12:54:21

Nature Communications:高福院士发现了一种新的抗流感广谱抗体

中科院院士、中科院微生物所研究员高福带领的研究团队与韩国科学家合作发现了一种新的人类抗体,这种抗体可以中和小鼠体内多个亚型流感病毒。研究表明,该抗体和病毒结合的方式非同寻常,或可以用来设计更有效的疫苗。该项研究发表于《自然—通讯》上。
在流感的三种类型中,甲型流感病毒引起的症状最严重,并且宿主物种范围最广。了解广谱对抗流感病毒的抗体是如何和病毒结合的,对于识别病毒上特定的区域进行有针对性的对抗非常重要。
高福等人研究了2009年甲型流感(H1N1)大流行中感染后恢复的病人的免疫细胞,并分离出一种具有强效对抗病毒能力的抗体。这种抗体能够和几种亚型流感病毒结合,防止它们感染易感细胞。研究人员给感染了甲型流感的小鼠使用这种抗体后,它能保护小鼠不会因为感染H1N1、H3N2和H5N1亚型的病毒而发病或死亡。研究还发现,这种抗体对于最近出现的感染人类的H7N9病毒也有中和作用。
经过研究分析,科研人员发现这种抗体是通过一种全新的结合机制发挥作用的,即一个抗体连接血凝素的两个单体而发挥作用。高福指出,这种抗体广谱对抗病毒的效果,可望在探索新的抗病毒疗法中发挥作用。

来源:中国科学报

ipsvirus 发表于 2015-7-22 12:55:07

A potent broad-spectrum protective human monoclonal antibody crosslinking two haemagglutinin monomers of influenza A virus

Ying Wu,        MyungSam Cho,        David Shore,        Manki Song,        JungAh Choi,        Tao Jiang,        Yong-Qiang Deng,        Melissa Bourgeois,        Lynn Almli,        Hua Yang,        Li-Mei Chen,        Yi Shi,        Jianxu Qi,        An Li,        Kye Sook Yi,        MinSeok Chang,        Jin Soo Bae,        HyunJoo Lee,        JiYoung Shin,        James Stevens, SeoungSuh Hong,        Cheng-Feng Qin,        George F. Gao,        Shin Jae Chang        & Ruben O. Donis

Effective annual influenza vaccination requires frequent changes in vaccine composition due to both antigenic shift for different subtype hemagglutinins (HAs) and antigenic drift in a particular HA. Here we present a broadly neutralizing human monoclonal antibody with an unusual binding modality. The antibody, designated CT149, was isolated from convalescent patients infected with pandemic H1N1 in 2009. CT149 is found to neutralize all tested group 2 and some group 1 influenza A viruses by inhibiting low pH-induced, HA-mediated membrane fusion. It promotes killing of infected cells by Fc-mediated antibody-dependent cellular cytotoxicity and complement-dependent cytotoxicity. X-ray crystallographic data reveal that CT149 binds primarily to the fusion domain in HA2, and the light chain is also largely involved in binding. The epitope recognized by this antibody comprises amino-acid residues from two adjacent protomers of HA. This binding characteristic of CT149 will provide more information to support the design of more potent influenza vaccines.


http://www.nature.com/ncomms/2015/150721/ncomms8708/full/ncomms8708.html

cao1976 发表于 2015-7-22 13:09:48

厉害,这个一会我上头条,呵呵

dangerdan 发表于 2015-7-22 13:24:51

厉害

Anny 发表于 2015-8-1 09:43:34

:)牛:(:(:(:(:(:(:(:(:(:(

cloudwin 发表于 2015-9-29 11:57:13

佩服。。。

ghx0123 发表于 2015-10-20 09:20:17

真的非常不错
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