Intranasal Delivery of MVA Vector Vaccine Induces Effective Pulmonary Immunity Against SARS-CoV-2 in Rodents

Berislav Bošnjak*, Ivan Odak, Joana Barros-Martins, Inga Sandrock, Swantje I. Hammerschmidt, Marc Permanyer, Gwendolyn E. Patzer, Hristo Greorgiev, Rodrigo Gutierrez Jauregui, Alina Tscherne, Jan Hendrik Schwarz, Georgia Kalodimou, George Ssebyatika, Malgorzata Ciurkiewicz, Stefanie Willenzon, Anja Bubke, Jasmin Ristenpart, Christiane Ritter, Tamara Tuchel, Christian Meyer zu NatrupDai Lun Shin, Sabrina Clever, Leonard Limpinsel, Wolfgang Baumgärtner, Thomas Krey, Asisa Volz, Gerd Sutter, Reinhold Förster

*Corresponding author for this work
45 Citations (Scopus)

Abstract

Antigen-specific tissue-resident memory T cells (Trms) and neutralizing IgA antibodies provide the most effective protection of the lungs from viral infections. To induce those essential components of lung immunity against SARS-CoV-2, we tested various immunization protocols involving intranasal delivery of a novel Modified Vaccinia virus Ankara (MVA)-SARS-2-spike vaccine candidate. We show that a single intranasal MVA-SARS-CoV-2-S application in mice strongly induced pulmonary spike-specific CD8+ T cells, albeit restricted production of neutralizing antibodies. In prime-boost protocols, intranasal booster vaccine delivery proved to be crucial for a massive expansion of systemic and lung tissue-resident spike-specific CD8+ T cells and the development of Th1 - but not Th2 - CD4+ T cells. Likewise, very high titers of IgG and IgA anti-spike antibodies were present in serum and broncho-alveolar lavages that possessed high virus neutralization capacities to all current SARS-CoV-2 variants of concern. Importantly, the MVA-SARS-2-spike vaccine applied in intramuscular priming and intranasal boosting treatment regimen completely protected hamsters from developing SARS-CoV-2 lung infection and pathology. Together, these results identify intramuscular priming followed by respiratory tract boosting with MVA-SARS-2-S as a promising approach for the induction of local, respiratory as well as systemic immune responses suited to protect from SARS-CoV-2 infections.

Original languageEnglish
Article number772240
JournalFrontiers in Immunology
Volume12
ISSN1664-3224
DOIs
Publication statusPublished - 11.11.2021

Funding

This work was supported by Deutsche Forschungsgemeinschaft, (DFG, German research Foundation) Excellence Strategy EXC 2155 ?RESIST? to RF and TK (Project ID39087428); by funds of the state of Lower Saxony (14-76103-184 CORONA-11/20) to RF and TK; by funds of the BMBF ("NaFoUniMedCovid19? FKZ: 01KX2021; Projects ?COVIM?and ?B-FAST?) to RF and TK and Deutsche Forschungsgemeinschaft, Projektnummer 158989968 - SFB 900 (Projects B1 to RF and B10 to TK); Projektnumber Fo 334/7-1 and the Bundesministerium f?r Bildung und Forschung (DZIF 01.92100 and 01KX2026 to GSu, ZOOVAC 01KI1718 and RAPID 01KI1723G to AV) and by a BMBF (Federal Ministry of Education and Research) project entitled RAPID (Risk assessment in re-pandemic respiratory infectious diseases), 01KI1723G and by the Ministry of Science and Culture of Lower Saxony in Germany (14 - 76103-184 CORONA-15/20) to WB. This work was supported by Deutsche Forschungsgemeinschaft, (DFG, German research Foundation) Excellence Strategy EXC 2155 “RESIST” to RF and TK (Project ID39087428); by funds of the state of Lower Saxony (14-76103-184 CORONA-11/20) to RF and TK; by funds of the BMBF ("NaFoUniMedCovid19” FKZ: 01KX2021; Projects “COVIM”and “B-FAST”) to RF and TK and Deutsche Forschungsgemeinschaft, Projektnummer

Fingerprint

Dive into the research topics of 'Intranasal Delivery of MVA Vector Vaccine Induces Effective Pulmonary Immunity Against SARS-CoV-2 in Rodents'. Together they form a unique fingerprint.

Cite this