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The SARS-CoV-2 spike L452R-e484q variant in the Indian B.1.617 strain showed significant reduction in the neutralization activity of immune sera

引用

Precision Clinical Medicine 2021年第3期4卷 149-154页

作者： Gen Li Zhongcheng Zhou Peng Du Meixing Yu Ning Li Xinxin Xiong Hong Huang Zhihai Liu qinjin Dai Jie Zhu Chengbin Guo ShanyunWu Daniel T.Baptista-Hon Man Miao LamWai Ming Yong Wu Fanxin Zeng Charlotte L.Zhang edward D.Zhang Haifeng Song Jianghai Liu Johnson Yiu-Nam Lau Andy P.Xiang Kang Zhang Guangzhou Women and Children’s Medical Center Guangzhou Medical UniversityGuangzhou 510620China University Hospital and Center for Biomedicine and Innovations Faculty of MedicineMacao University of Science and TechnologyMacao 030027China Jinan University First Affiliated Hospital Jinan UniversityGuangzhou 510630China Department of Clinical Research Center Dazhou Central HospitalDazhou 635099China Department of Bioinformatics and AI Bioland LaboratoryGuangzhou 510000China ABLINK Biotech Co. Chengdu 610000China Department of Applied Biology and Chemical Technology Hong Kong Polytechnic UniversityHung HomHong Kong 610051China Center for Stem Cell Biology and Tissue engineering Key Laboratory for Stem Cells and Tissue EngineeringMinistry of EducationSun Yat-sen UniversityGuangzhou 510000China

To assess the impact of the key non-synonymous amino acid substitutions in the RBD of the spike protein of SARS-CoV-2 variant B.1.617.1(dominant variant identified in the current India outbreak)on the infectivity and neutralization activities of the immune sera,L452R and e484q(L452R-e484q variant),pseudotyped virus was constructed(with the D614G background).The impact on binding with the neutralizing antibodies was also assessed with an eLISA *** virus carrying a L452R-e484q variant showed a comparable infectivity compared with ***,there was a significant reduction in the neutralization activity of the immune sera from non-human primates vaccinated with a recombinant receptor binding domain(RBD)protein,convalescent patients,and healthy vaccinees vaccinated with anmRNA *** addition,there was a reduction in binding of L452R-e484q-D614G protein to the antibodies of theimmune sera fromvaccinated nonhuman *** results highlight the interplay between infectivity and other biologic factors involved in the natural evolution of *** neutralization activities against the L452R-e484q variant will have an impact on health authority planning and implications for the vaccination strategy/newvaccine development.

关键词： SARS-CoV-2 COVID-19 B.1.617.1 L452R e484q infectivity immune neutralization

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