Deciphering the Role of Humoral and Cellular Immune Responses in Different COVID-19 Vaccines—A Comparison of Vaccine Candidate Genes in Roborovski Dwarf Hamsters

With the exception of inactivated vaccines, all SARS-CoV-2 vaccines currently used for clinical application focus on the spike envelope glycoprotein as a virus-specific antigen. Compared to other SARS-CoV-2 genes, mutations in the spike protein gene are more rapidly selected and spread within the po...

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Autores principales: Jakob Trimpert, Susanne Herwig, Julia Stein, Daria Vladimirova, Julia M. Adler, Azza Abdelgawad, Theresa C. Firsching, Tizia Thoma, Jalid Sehouli, Klaus Osterrieder, Achim D. Gruber, Birgit Sawitzki, Leif Erik Sander, Günter Cichon
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Publicado: MDPI AG 2021
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Acceso en línea:https://doaj.org/article/b30d56503a0141bb824f2651c751f2d7
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spelling oai:doaj.org-article:b30d56503a0141bb824f2651c751f2d72021-11-25T19:14:13ZDeciphering the Role of Humoral and Cellular Immune Responses in Different COVID-19 Vaccines—A Comparison of Vaccine Candidate Genes in Roborovski Dwarf Hamsters10.3390/v131122901999-4915https://doaj.org/article/b30d56503a0141bb824f2651c751f2d72021-11-01T00:00:00Zhttps://www.mdpi.com/1999-4915/13/11/2290https://doaj.org/toc/1999-4915With the exception of inactivated vaccines, all SARS-CoV-2 vaccines currently used for clinical application focus on the spike envelope glycoprotein as a virus-specific antigen. Compared to other SARS-CoV-2 genes, mutations in the spike protein gene are more rapidly selected and spread within the population, which carries the risk of impairing the efficacy of spike-based vaccines. It is unclear to what extent the loss of neutralizing antibody epitopes can be compensated by cellular immune responses, and whether the use of other SARS-CoV-2 antigens might cause a more diverse immune response and better long-term protection, particularly in light of the continued evolution towards new SARS-CoV-2 variants. To address this question, we explored immunogenicity and protective effects of adenoviral vectors encoding either the full-length spike protein (S), the nucleocapsid protein (N), the receptor binding domain (RBD) or a hybrid construct of RBD and the membrane protein (M) in a highly susceptible COVID-19 hamster model. All adenoviral vaccines provided life-saving protection against SARS-CoV-2-infection. The most efficient protection was achieved after exposure to full-length spike. However, the nucleocapsid protein, which triggered a robust T-cell response but did not facilitate the formation of neutralizing antibodies, controlled early virus replication efficiently and prevented severe pneumonia. Although the full-length spike protein is an excellent target for vaccines, it does not appear to be the only option for future vaccine design.Jakob TrimpertSusanne HerwigJulia SteinDaria VladimirovaJulia M. AdlerAzza AbdelgawadTheresa C. FirschingTizia ThomaJalid SehouliKlaus OsterriederAchim D. GruberBirgit SawitzkiLeif Erik SanderGünter CichonMDPI AGarticleSARS-CoV-2vaccine genesdwarf hamsteranimal modeladenoviral vectorsMicrobiologyQR1-502ENViruses, Vol 13, Iss 2290, p 2290 (2021)
institution DOAJ
collection DOAJ
language EN
topic SARS-CoV-2
vaccine genes
dwarf hamster
animal model
adenoviral vectors
Microbiology
QR1-502
spellingShingle SARS-CoV-2
vaccine genes
dwarf hamster
animal model
adenoviral vectors
Microbiology
QR1-502
Jakob Trimpert
Susanne Herwig
Julia Stein
Daria Vladimirova
Julia M. Adler
Azza Abdelgawad
Theresa C. Firsching
Tizia Thoma
Jalid Sehouli
Klaus Osterrieder
Achim D. Gruber
Birgit Sawitzki
Leif Erik Sander
Günter Cichon
Deciphering the Role of Humoral and Cellular Immune Responses in Different COVID-19 Vaccines—A Comparison of Vaccine Candidate Genes in Roborovski Dwarf Hamsters
description With the exception of inactivated vaccines, all SARS-CoV-2 vaccines currently used for clinical application focus on the spike envelope glycoprotein as a virus-specific antigen. Compared to other SARS-CoV-2 genes, mutations in the spike protein gene are more rapidly selected and spread within the population, which carries the risk of impairing the efficacy of spike-based vaccines. It is unclear to what extent the loss of neutralizing antibody epitopes can be compensated by cellular immune responses, and whether the use of other SARS-CoV-2 antigens might cause a more diverse immune response and better long-term protection, particularly in light of the continued evolution towards new SARS-CoV-2 variants. To address this question, we explored immunogenicity and protective effects of adenoviral vectors encoding either the full-length spike protein (S), the nucleocapsid protein (N), the receptor binding domain (RBD) or a hybrid construct of RBD and the membrane protein (M) in a highly susceptible COVID-19 hamster model. All adenoviral vaccines provided life-saving protection against SARS-CoV-2-infection. The most efficient protection was achieved after exposure to full-length spike. However, the nucleocapsid protein, which triggered a robust T-cell response but did not facilitate the formation of neutralizing antibodies, controlled early virus replication efficiently and prevented severe pneumonia. Although the full-length spike protein is an excellent target for vaccines, it does not appear to be the only option for future vaccine design.
format article
author Jakob Trimpert
Susanne Herwig
Julia Stein
Daria Vladimirova
Julia M. Adler
Azza Abdelgawad
Theresa C. Firsching
Tizia Thoma
Jalid Sehouli
Klaus Osterrieder
Achim D. Gruber
Birgit Sawitzki
Leif Erik Sander
Günter Cichon
author_facet Jakob Trimpert
Susanne Herwig
Julia Stein
Daria Vladimirova
Julia M. Adler
Azza Abdelgawad
Theresa C. Firsching
Tizia Thoma
Jalid Sehouli
Klaus Osterrieder
Achim D. Gruber
Birgit Sawitzki
Leif Erik Sander
Günter Cichon
author_sort Jakob Trimpert
title Deciphering the Role of Humoral and Cellular Immune Responses in Different COVID-19 Vaccines—A Comparison of Vaccine Candidate Genes in Roborovski Dwarf Hamsters
title_short Deciphering the Role of Humoral and Cellular Immune Responses in Different COVID-19 Vaccines—A Comparison of Vaccine Candidate Genes in Roborovski Dwarf Hamsters
title_full Deciphering the Role of Humoral and Cellular Immune Responses in Different COVID-19 Vaccines—A Comparison of Vaccine Candidate Genes in Roborovski Dwarf Hamsters
title_fullStr Deciphering the Role of Humoral and Cellular Immune Responses in Different COVID-19 Vaccines—A Comparison of Vaccine Candidate Genes in Roborovski Dwarf Hamsters
title_full_unstemmed Deciphering the Role of Humoral and Cellular Immune Responses in Different COVID-19 Vaccines—A Comparison of Vaccine Candidate Genes in Roborovski Dwarf Hamsters
title_sort deciphering the role of humoral and cellular immune responses in different covid-19 vaccines—a comparison of vaccine candidate genes in roborovski dwarf hamsters
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/b30d56503a0141bb824f2651c751f2d7
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