[HTML][HTML] A single dose of recombinant VSV-∆ G-spike vaccine provides protection against SARS-CoV-2 challenge

Y Yahalom-Ronen, H Tamir, S Melamed, B Politi… - Nature …, 2020 - nature.com
Y Yahalom-Ronen, H Tamir, S Melamed, B Politi, O Shifman, H Achdout, EB Vitner, O Israeli…
Nature communications, 2020nature.com
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 …
Abstract
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.
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