tetano
Editor, Senior Moderator
NPJ Vaccines
. 2022 Sep 23;7(1):110.
doi: 10.1038/s41541-022-00532-7.
Inactivated rabies-vectored SARS-CoV-2 vaccine provides long-term immune response unaffected by vector immunity
Catherine Yankowski[SUP] 1 [/SUP], Christoph Wirblich[SUP] 1 [/SUP], Drishya Kurup[SUP] 2 3 [/SUP], Matthias J Schnell[SUP] 4 5 [/SUP]
Affiliations
Abstract
The objective of this study is to further analyze recombinant rabies virus-vectored SARS-CoV-2 vaccine, CORAVAX, as an effective COVID-19 vaccine strategy. CORAVAX has proven immunogenic and protective against SARS-CoV-2 in animal models. Here, we have screened adjuvants for the highest quality antibody titers, negated the concern of pre-existing rabies-vector immunity, and established its potential as a long-term COVID-19 vaccine. We have tested toll-like receptor 4 (TLR4) agonists, inflammasome activators, and alum adjuvants in CORAVAX and found TLR4-activating MPLA-AddaVax to have the greatest potential. We followed the humoral immune response to CORAVAX in mice with pre-existing rabies virus immunity and saw no significant differences compared to naive mice. We then followed the immune response to CORAVAX over several months and 1-year post-immunization. Mice maintained high antigen-specific serum antibody titers as well as long-lived antibody-secreting cells in the spleen and bone marrow. We believe this rabies-vector strategy combats the problem of waning immunity of other COVID-19 vaccines. These results together support CORAVAX's potential during the ongoing COVID-19 pandemic.
. 2022 Sep 23;7(1):110.
doi: 10.1038/s41541-022-00532-7.
Inactivated rabies-vectored SARS-CoV-2 vaccine provides long-term immune response unaffected by vector immunity
Catherine Yankowski[SUP] 1 [/SUP], Christoph Wirblich[SUP] 1 [/SUP], Drishya Kurup[SUP] 2 3 [/SUP], Matthias J Schnell[SUP] 4 5 [/SUP]
Affiliations
- PMID: 36151100
- PMCID: PMC9508099
- DOI: 10.1038/s41541-022-00532-7
Abstract
The objective of this study is to further analyze recombinant rabies virus-vectored SARS-CoV-2 vaccine, CORAVAX, as an effective COVID-19 vaccine strategy. CORAVAX has proven immunogenic and protective against SARS-CoV-2 in animal models. Here, we have screened adjuvants for the highest quality antibody titers, negated the concern of pre-existing rabies-vector immunity, and established its potential as a long-term COVID-19 vaccine. We have tested toll-like receptor 4 (TLR4) agonists, inflammasome activators, and alum adjuvants in CORAVAX and found TLR4-activating MPLA-AddaVax to have the greatest potential. We followed the humoral immune response to CORAVAX in mice with pre-existing rabies virus immunity and saw no significant differences compared to naive mice. We then followed the immune response to CORAVAX over several months and 1-year post-immunization. Mice maintained high antigen-specific serum antibody titers as well as long-lived antibody-secreting cells in the spleen and bone marrow. We believe this rabies-vector strategy combats the problem of waning immunity of other COVID-19 vaccines. These results together support CORAVAX's potential during the ongoing COVID-19 pandemic.