Spike mutation D614G alters SARS-CoV-2 fitness.

Spike mutation D614G alters SARS-CoV-2 fitness.
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DOI:
10.1038/s41586-020-2895-3
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发表时间:
2021-04
期刊:
影响因子:
64.8
通讯作者:
Shi PY
Shi PY
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Plante JA;Liu Y;Liu J;Xia H;Johnson BA;Lokugamage KG;Zhang X;Muruato AE;Zou J;Fontes-Garfias CR;Mirchandani D;Scharton D;Bilello JP;Ku Z;An Z;Kalveram B;Freiberg AN;Menachery VD;Xie X;Plante KS;Weaver SC;Shi PY

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在COVID-19大流行期间,一种刺突蛋白突变D 614 G在SARS-CoV-2中成为显性。然而,对病毒传播和疫苗效力的影响仍有待确定。在这里,我们在USA-WA 1/2020菌株中设计了D 614 G突变并表征了其作用。D 614 G通过改善病毒粒子的感染性增强人肺上皮细胞和原代人气道组织上的复制。感染G614变异体的仓鼠在鼻洗液和气管中产生了更高的感染滴度,但在肺部没有,这证实了临床证据,即D 614 G突变增强了COVID-19患者上呼吸道的病毒载量,并可能增加传播。来自D 614感染仓鼠的血清显示出对G614病毒的中和滴度略高于对D 614病毒的中和滴度,这表明(i)该突变可能不会降低临床试验中疫苗预防COVID-19的能力,以及(ii)治疗性抗体应针对循环G614病毒进行测试。结合临床发现,我们的工作强调了这种突变在病毒传播、疫苗有效性和抗体治疗中的重要性。
A spike protein mutation D614G became dominant in SARS-CoV-2 during the COVID-19 pandemic. However, the impact on viral spread and vaccine efficacy remains to be defined. Here, we engineer the D614G mutation in the USA-WA1/2020 strain and characterize its effect. D614G enhances replication on human lung epithelial cells and primary human airway tissues through an improved infectivity of virions. Hamsters infected with the G614 variant produced higher infectious titers in the nasal washes and trachea, but not lungs, confirming clinical evidence that the D614G mutation enhances viral loads in the upper respiratory tract of COVID-19 patients and may increases transmission. Sera from D614-infected hamsters exhibit modestly higher neutralization titers against G614 virus than against D614 virus, indicating that (i) the mutation may not reduce the ability of vaccines in clinical trials to protect against COVID-19 and (ii) therapeutic antibodies should be tested against the circulating G614 virus. Together with clinical findings, our work underscores the importance of this mutation in viral spread, vaccine efficacy, and antibody therapy.
DOI: 10.1016/j.cell.2020.05.042
发表时间: 2020-07-23
期刊: CELL
影响因子: 64.5
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发表时间: 2009-12-15
期刊: BIOINFORMATICS
影响因子: 5.8
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Carr, I. M.;Robinson, J. I.;Bonthron, D. T.
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发表时间: 2011-01-01
影响因子: 5.4
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