Mucosal vaccination induces protection against SARS-CoV-2 in the absence of detectable neutralizing antibodies

Author:

Zhong Chaojie,Xia HongjieORCID,Adam Awadalkareem,Wang Binbin,Hajnik Renee L.,Liang YuejinORCID,Rafael Grace H.,Zou Jing,Wang Xiaofang,Sun Jiaren,Soong Lynn,Barrett Alan D. T.ORCID,Weaver Scott C.ORCID,Shi Pei-YongORCID,Wang TianORCID,Hu HaitaoORCID

Abstract

AbstractA candidate multigenic SARS-CoV-2 vaccine based on an MVA vector expressing both viral N and S proteins (MVA-S + N) was immunogenic, and induced T-cell responses and binding antibodies to both antigens but in the absence of detectable neutralizing antibodies. Intranasal immunization with the vaccine diminished viral loads and lung inflammation in mice after SARS-CoV-2 challenge, which correlated with the T-cell response induced by the vaccine in the lung, indicating that T-cell immunity is also likely critical for protection against SARS-CoV-2 infection in addition to neutralizing antibodies.

Funder

University of Texas Medical Branch

U.S. Department of Health & Human Services | NIH | National Institute of Allergy and Infectious Diseases

U.S. Department of Health & Human Services | NIH | National Center for Advancing Translational Sciences

Sealy & Smith Foundation, Kleberg Foundation, the John S. Dunn Foundation, the Amon G. Carter Foundation, the Gilson Longenbaugh Foundation, and the Summerfield Robert Foundation.

Publisher

Springer Science and Business Media LLC

Subject

Pharmacology (medical),Infectious Diseases,Pharmacology,Immunology

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