Neutralization of Severe Acute Respiratory Syndrome Coronavirus 2 Omicron Variant by Sera From BNT162b2 or CoronaVac Vaccine Recipients
| العنوان: | Neutralization of Severe Acute Respiratory Syndrome Coronavirus 2 Omicron Variant by Sera From BNT162b2 or CoronaVac Vaccine Recipients |
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| المؤلفون: | Lu Lu, Bobo Wing Yee Mok, Lin Lei Chen, Jacky Man Chun Chan, Owen Tak Yin Tsang, Bosco Hoi Shiu Lam, Vivien Wai Man Chuang, Allen Wing Ho Chu, Wan Mui Chan, Jonathan Daniel Ip, Brian Pui Chun Chan, Ruiqi Zhang, Cyril Chik Yan Yip, Vincent Chi Chung Cheng, Kwok Hung Chan, Dong Yan Jin, Ivan Fan Ngai Hung, Kwok Yung Yuen, Honglin Chen, Kelvin Kai Wang To |
| المصدر: | Clinical Infectious Diseases. 75:e822-e826 |
| بيانات النشر: | Oxford University Press (OUP), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Microbiology (medical), Infectious Diseases |
| الوصف: | Background The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) omicron variant, designated as a variant of concern by the World Health Organization, carries numerous spike mutations that are known to evade neutralizing antibodies elicited by coronavirus disease 2019 (COVID-19) vaccines. A deeper understanding of the susceptibility of omicron variant to vaccine-induced neutralizing antibodies is urgently needed for risk assessment. Methods Omicron variant strains HKU691 and HKU344-R346K were isolated from patients using TMPRSS2-overexpressing VeroE6 cells. Whole genome sequence was determined using nanopore sequencing. Neutralization susceptibility of ancestral lineage A virus and the omicron, delta and beta variants to sera from 25 BNT162b2 and 25 CoronaVac vaccine recipients was determined using a live virus microneutralization assay. Results The omicron variant strain HKU344-R346K has an additional spike R346K mutation, which is present in 8.5% of strains deposited in the GISAID database. Only 20% and 24% of BNT162b2 recipients had detectable neutralizing antibody against the omicron variant HKU691 and HKU344-R346K, respectively, whereas none of the CoronaVac recipients had detectable neutralizing antibody titer against either omicron isolate. For BNT162b2 recipients, the geometric mean neutralization antibody titers (GMTs) of the omicron variant isolates (5.43 and 6.42) were 35.7–39.9-fold lower than that of the ancestral virus (229.4), and the GMTs of both omicron variant isolates were significantly lower than those of the beta and delta variants. There was no significant difference in the GMTs between HKU691 and HKU344-R346K. Conclusions Omicron variant escapes neutralizing antibodies elicited by BNT162b2 or CoronaVac. The additional R346K mutation did not affect the neutralization susceptibility. Our data suggest that the omicron variant may be associated with lower COVID-19 vaccine effectiveness. |
| تدمد: | 1537-6591 1058-4838 |
| DOI: | 10.1093/cid/ciab1041 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::d55dc889af8ddbcc70d7ff969b318e28 https://doi.org/10.1093/cid/ciab1041 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........d55dc889af8ddbcc70d7ff969b318e28 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15376591 10584838 |
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| DOI: | 10.1093/cid/ciab1041 |