[PDF][PDF] A modified vaccinia Ankara vector-based vaccine protects macaques from SARS-CoV-2 infection, immune pathology, and dysfunction in the lungs

NK Routhu, N Cheedarla, S Gangadhara… - Immunity, 2021 - cell.com
Immunity, 2021cell.com
A combination of vaccination approaches will likely be necessary to fully control the severe
acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic. Here, we show that
modified vaccinia Ankara (MVA) vectors expressing membrane-anchored pre-fusion
stabilized spike (MVA/S) but not secreted S1 induced strong neutralizing antibody
responses against SARS-CoV-2 in mice. In macaques, the MVA/S vaccination induced
strong neutralizing antibodies and CD8+ T cell responses, and conferred protection from …
Summary
A combination of vaccination approaches will likely be necessary to fully control the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic. Here, we show that modified vaccinia Ankara (MVA) vectors expressing membrane-anchored pre-fusion stabilized spike (MVA/S) but not secreted S1 induced strong neutralizing antibody responses against SARS-CoV-2 in mice. In macaques, the MVA/S vaccination induced strong neutralizing antibodies and CD8+ T cell responses, and conferred protection from SARS-CoV-2 infection and virus replication in the lungs as early as day 2 following intranasal and intratracheal challenge. Single-cell RNA sequencing analysis of lung cells on day 4 after infection revealed that MVA/S vaccination also protected macaques from infection-induced inflammation and B cell abnormalities and lowered induction of interferon-stimulated genes. These results demonstrate that MVA/S vaccination induces neutralizing antibodies and CD8+ T cells in the blood and lungs and is a potential vaccine candidate for SARS-CoV-2.
cell.com