A single dose of replication-competent VSV-vectored vaccine expressing SARS-CoV-2 S1 protects against virus replication in a hamster model of severe COVID-19

Delphine C. Malherbe, Drishya Kurup, Christoph Wirblich, Adam Ronk, Chad Mire, Natalia Kuzmina, Noor Shaik, Sivakumar Periasamy, Matthew A. Hyde, Julie M. Williams, Pei Yong Shi, Matthias J. Schnell, Alexander Bukreyev

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The development of effective countermeasures against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the agent responsible for the COVID-19 pandemic, is a priority. We designed and produced ConVac, a replication-competent vesicular stomatitis virus (VSV) vaccine vector that expresses the S1 subunit of SARS-CoV-2 spike protein. We used golden Syrian hamsters as animal models of severe COVID-19 to test the efficacy of the ConVac vaccine. A single vaccine dose elicited high levels of SARS-CoV-2 specific binding and neutralizing antibodies; following intranasal challenge with SARS-CoV-2, animals were protected from weight loss and viral replication in the lungs. No enhanced pathology was observed in vaccinated animals upon challenge, but some inflammation was still detected. The data indicate rapid control of SARS-CoV-2 replication by the S1-based VSV-vectored SARS-CoV-2 ConVac vaccine.

Original languageEnglish (US)
Article number91
Journalnpj Vaccines
Volume6
Issue number1
DOIs
StatePublished - Dec 2021

ASJC Scopus subject areas

  • Immunology
  • Pharmacology
  • Infectious Diseases
  • Pharmacology (medical)

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