The COVID-19 pandemic caused by SARS-CoV-2 imposes an urgent need for rapid development of an efficient and cost-effective vaccine, suitable for mass immunization. Here, we show the development of a replication competent recombinant VSV-∆G-spike vaccine, in which the glycoprotein of VSV is replaced by the spike protein of SARS-CoV-2. In-vitro characterization of this vaccine indicates the expression and presentation of the spike protein on the viral membrane with antigenic similarity to SARS-CoV-2. A golden Syrian hamster in-vivo model for COVID-19 is implemented. We show that a single-dose vaccination results in a rapid and potent induction of SARS-CoV-2 neutralizing antibodies. Importantly, vaccination protects hamsters against SARS-CoV-2 challenge, as demonstrated by the abrogation of body weight loss, and alleviation of the extensive tissue damage and viral loads in lungs and nasal turbinates. Taken together, we suggest the recombinant VSV-∆G-spike as a safe, efficacious and protective vaccine against SARS-CoV-2. Here, the authors generate a replication-competent VSV based vaccine expressing SARS-CoV-2 spike protein and show protection in the hamster model with one dose. Analysis of the antibody response in mice shows induction of neutralizing antibodies and suggests a desirable Th1-biased response to the vaccine.
【저자키워드】 SARS-CoV-2, Vaccines, 【초록키워드】 COVID-19, neutralizing antibody, Vaccine, vaccination, Neutralizing antibodies, hamsters, body weight, COVID-19 pandemic, Antibody Response, lung, immunization, Spike protein, Replication, Viral, VSV, Viral load, mice, Lungs, SARS-CoV-2 spike protein, glycoprotein, hamster, expression, SARS-CoV-2 neutralizing antibodies, Protective, dose, similarity, Safe, nasal turbinates, mass immunization, weight loss, tissue damage, viral membrane, antigenic, viral loads, REPLACED BY, alleviation, Body weight loss, abrogation, PROTECT, caused, generate, indicate, the spike protein, demonstrated, replaced, expressing, the vaccine, competent, the antibody response, 【제목키워드】 Vaccine, single dose, provide,