Evaluation of the human adaptation of influenza A/H7N9 virus in PB2 protein using human and swine respiratory tract explant cultures.

Evaluation of the human adaptation of influenza A/H7N9 virus in PB2 protein using human and swine respiratory tract explant cultures.
复制标题

DOI:
10.1038/srep35401
复制
发表时间:
2016-10-14
期刊:
影响因子:
4.6
通讯作者:
Chan RW
Chan RW
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Chan LL;Bui CT;Mok CK;Ng MM;Nicholls JM;Peiris JS;Chan MC;Chan RW

文献摘要

参考文献

被引文献

相似文献

2013年中国出现了新型禽流感H7N9病毒,导致病死率约为39%,并继续构成人畜共患和大流行的风险。PB 2蛋白中的氨基酸取代被证明会影响H7N9在雪貂和小鼠实验感染后的致病性和传播性。在这项研究中,我们评估了PB 2 - 627 K氨基酸取代或PB 2 - 591 K和PB 2 - 701 N的补偿性变化对H7N9病毒对人和猪呼吸道的嗜性和复制能力的作用,使用离体器官外植体培养物。采用基于质粒的反向遗传学方法构建了A/Shanghai/2/2013(rgH 7 N9)及其PB 2-K627 E、PB 2-K627 E + Q591 K和PB 2-K627 E + D 701 N突变体的重组病毒。PB 2-E627 K是rgH 7 N9在人和猪呼吸道离体培养物中有效复制所必需的。突变体rgPB 2-K627 E + D 701 N在人肺中的复制优于rgPB 2-K627 E,但不如rgH 7 N9病毒。rgPB 2-K627 E突变体在37 °C下不能在人I型样肺细胞(ATI)和外周血单核细胞衍生的巨噬细胞(PM)中复制,而补偿突变体rgPB 2-K627 E + Q591 K和rgPB 2-K627 E + D 701 N在PM中部分恢复了复制能力。我们的研究结果表明,PB 2-E627 K对于H7N9流感病毒在人和猪呼吸道中的有效复制是重要的。
Novel avian H7N9 virus emerged in China in 2013 resulting in a case fatality rate of around 39% and continues to pose zoonotic and pandemic risk. Amino acid substitutions in PB2 protein were shown to influence the pathogenicity and transmissibility of H7N9 following experimental infection of ferrets and mice. In this study, we evaluated the role of amino acid substitution PB2-627K or compensatory changes at PB2-591K and PB2-701N, on the tropism and replication competence of H7N9 viruses for human and swine respiratory tracts using ex vivo organ explant cultures. Recombinant viruses of A/Shanghai/2/2013 (rgH7N9) and its mutants with PB2-K627E, PB2-K627E + Q591K and PB2-K627E + D701N were generated by plasmid-based reverse genetics. PB2-E627K was essential for efficient replication of rgH7N9 in ex vivo cultures of human and swine respiratory tracts. Mutant rgPB2-K627E + D701N replicated better than rgPB2-K627E in human lung but not as well as rgH7N9 virus. The rgPB2-K627E mutant failed to replicate in human type I-like pneumocytes (ATI) and peripheral blood monocyte-derived macrophages (PMϕ) at 37 °C while the compensatory mutant rgPB2-K627E + Q591K and rgPB2-K627E + D701N had partly restored replication competence in PMϕ. Our results demonstrate that PB2-E627K was important for efficient replication of influenza H7N9 in both human and swine respiratory tracts.
DOI: 10.1038/nature14348
发表时间: 2015-06-04
期刊: NATURE
影响因子: 64.8
作者:
Lam, Tommy Tsan-Yuk;Zhou, Boping;Zhu, Huachen
通讯作者: Zhu, Huachen
DOI: 10.1038/nri3665
发表时间: 2014-05
期刊: Nature reviews. Immunology
影响因子: --
作者:
通讯作者: --
DOI: 10.1093/infdis/jir665
发表时间: 2011-12-15
影响因子: 6.4
作者:
Hui, Kenrie P. Y.;Lee, Suki M. Y.;Peiris, J. S. M.
通讯作者: Peiris, J. S. M.
DOI: 10.1073/pnas.0507415102
发表时间: 2005-12-20
影响因子: 11.1
作者:
Gabriel, G;Dauber, B;Stech, J
通讯作者: Stech, J
111例甲型H7N9流感病毒感染临床观察
DOI: 10.1056/nejmoa1305584
发表时间: 2013-06-13
影响因子: 158.5
作者:
Gao, Hai-Nv;Lu, Hong-Zhou;Li, Lan-Juan
通讯作者: Li, Lan-Juan