Intranasal booster using an Omicron vaccine confers broad mucosal and systemic immunity against SARS-CoV-2 variants  

作　　者：Qian Wang Chenchen Yang Li Yin Jing Sun Wei Wang Hengchun Li Zhengyuan Zhang Si Chen Bo Liu Zijian Liu Linjing Shi Xiaolin Liu Suhua Guan Chunhua Wang Linbing Qu Ying Feng Xuefeng Niu Liqiang Feng Jincun Zhao Pingchao Li Ling Chen Nanshan Zhong 

机构地区：[1]State Key Laboratory of Respiratory Disease,Guangzhou Institute of Respiratory Health,The First Affiliated Hospital of Guangzhou Medical University,Guangzhou,China [2]Guangzhou nBiomed Ltd.,Guangzhou,China [3]Guangzhou Laboratory&Bioland Laboratory,Guangzhou,China [4]Guangdong Laboratory of Computational Biomedicine,Guangzhou Institutes of Biomedicine and Health,Chinese Academy of Sciences,Guangzhou,China [5]University of Chinese Academy of Sciences,Beijing,China

出　　处：《Signal Transduction and Targeted Therapy》2023年第5期2345-2353,共9页信号转导与靶向治疗（英文）

基　　金：supported by the National Natural Science Foundation of China (92269201,82061138006);Youth Innovation Promotion Association of CAS (2022361);National Key R&D Program of China (2021YFC2301700);Guangdong Provincial Key R&D Program (2021A1111090004,2022B1111070001);Science and Technology Planning Project of Guangdong Province (2009A081000003);Guangdong Basic and Applied Basic Research Foundation (2022B1515020059);Emergency Key Program of Guangzhou Laboratory (EKPG21-20,EKPG21-30-3);Talent program of Huangpu District (2021-2036).

摘　　要：The highly contagious SARS-CoV-2 Omicron subvariants severely attenuated the effectiveness of currently licensed SARS-CoV-2 vaccines based on ancestral strains administered via intramuscular injection.In this study,we generated a recombinant,replication-incompetent human adenovirus type 5,Ad5-S-Omicron,that expresses Omicron BA.1 spike.Intranasal,but not intramuscular vaccination,elicited spike-specific respiratory mucosal IgA and residential T cell immune responses,in addition to systemic neutralizing antibodies and T cell immune responses against most Omicron subvariants.We tested intranasal Ad5-S-Omicron as a heterologous booster in mice that previously received intramuscular injection of inactivated ancestral vaccine.In addition to inducing serum broadly neutralizing antibodies,there was a significant induction of respiratory mucosal IgA and neutralizing activities against Omicron subvariants BA.1,BA.2,BA.5,BA.2.75,BF.7 as well as pre-Omicron strains Wildtype,Beta,and Delta.Serum and mucosal neutralizing activities against recently emerged XBB,BQ.1,and BQ.1.1 could also be detected but were much lower.Nasal lavage fluids from intranasal vaccination contained multimeric IgA that can bind to at least 10 spike proteins,including Omicron subvariants and pre-Omicron strains,and possessed broadly neutralizing activities.Intranasal vaccination using Ad5-S-Omicron or instillation of intranasal vaccinee’s nasal lavage fluids in mouse nostrils protected mice against Omicron challenge.Taken together,intranasal Ad5-S-Omicron booster on the basis of ancestral vaccines can establish effective mucosal and systemic immunity against Omicron subvariants and multiple SARS-CoV-2 variants.This candidate vaccine warrants further development as a safe,effective,and user-friendly infection and transmission-blocking vaccine.

关 键 词：NASAL IMMUNITY MUCOSAL 

分 类 号：R563.1[医药卫生—呼吸系统]