ArticlePloS one2008
Nasal delivery of an adenovirus-based vaccine bypasses pre-existing immunity to the vaccine carrier and improves the immune response in mice.
Article in PloS one, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 114 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
114 citing papers in PubMed, 171 citations in OpenAlex.
- First-in-Human Evaluation of the Safety and Immunogenicity of an Intranasally Administered Replication-Competent Sendai Virus-Vectored HIV Type 1 Gag Vaccine: Induction of Potent T-Cell or Antibody Responses in Prime-Boost Regimens.The Journal of infectious diseases · 2017Trial
- An adenoviral-vectored vaccine protects mice against aerosol challenge with Yersinia pestis.Molecular therapy : the journal of the American Society of Gene Therapy · 2026Article
- Intranasal replicating adenovirus type 4-vectored SARS-CoV-2 vaccines induce durable and efficacious responses in preclinical testing.iScience · 2026Article
- Current status of intranasal and inhaled COVID-19 vaccines.NPJ vaccines · 2026Review
- Intranasal Replicating Adenovirus type 4-SARS-CoV-2 Recombinants Induce Superior Immune Response Durability and Efficacy in Preclinical Testing Compared to Standard Intramuscular Vaccines.bioRxiv : the preprint server for biology · 2026Article
- Enhancing the breadth of protection in mice with a multivalent influenza vaccine.Communications biology · 2026Article
- Next-generation intranasal influenza vaccines: mechanisms, platforms, and translational progress.Frontiers in immunology · 2026Review
- Design and Engineering of Recombinant Oncolytic Adenoviruses Expressing an Anti-EpCAM/Anti-CD3 BiTE for Targeted Immunotherapy of A549 Lung Cancer Cells.OncoTargets and therapy · 2026Article
- Developing the next-generation of adenoviral vector vaccines.Human vaccines & immunotherapeutics · 2025Review
- Article
- Effect of heterologous intranasal iNCOVACCCommunications medicine · 2025Article
- Article
- Dissecting immunological mechanisms underlying influenza viral nucleoprotein-induced mucosal immunity against diverse viral strains.Emerging microbes & infections · 2024Article
- Review
- A causal multiomics study discriminates the early immune features of Ad5-vectored Ebola vaccine recipients.Innovation (Cambridge (Mass.)) · 2024Article
- An intranasal combination vaccine induces systemic and mucosal immunity against COVID-19 and influenza.NPJ vaccines · 2024Article
- Review
- Construction and application of adenoviral vectors.Molecular therapy. Nucleic acids · 2023Review
- Phase III Pivotal comparative clinical trial of intranasal (iNCOVACC) and intramuscular COVID 19 vaccine (CovaxinNPJ vaccines · 2023Article
- SARS-CoV-2: Immunity, Challenges with Current Vaccines, and a Novel Perspective on Mucosal Vaccines.Vaccines · 2023Review
54 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 4 institutions in 2 countries.
Funding
Abstract
Pre-existing immunity to human adenovirus serotype 5 (Ad5) is common in the general population. Bypassing pre-existing immunity could maximize Ad5 vaccine efficacy. Vaccination by the intramuscular (I.M.), nasal (I.N.) or oral (P.O.) route with Ad5 expressing Ebola Zaire glycoprotein (Ad5-ZGP) fully protected naïve mice against lethal challenge with Ebola. In the presence of pre-existing immunity, only mice vaccinated I.N. survived. The frequency of IFN-gamma+ CD8+ T cells was reduced by 80% and by 15% in animals vaccinated by the I.M. and P.O. routes respectively. Neutralizing antibodies could not be detected in serum from either treatment group. Pre-existing immunity did not compromise the frequency of IFN-gamma+ CD8+ T cells (3.9+/-1% naïve vs. 3.6+/-1% pre-existing immunity, PEI) nor anti-Ebola neutralizing antibody (NAB, 40+/-10 reciprocal dilution, both groups). The number of INF-gamma+ CD8+ cells detected in bronchioalveolar lavage fluid (BAL) after I.N. immunization was not compromised by pre-existing immunity to Ad5 (146+/-14, naïve vs. 120+/-16 SFC/million MNCs, PEI). However, pre-existing immunity reduced NAB levels in BAL by approximately 25% in this group. To improve the immune response after oral vaccination, the Ad5-based vaccine was PEGylated. Mice given the modified vaccine did not survive challenge and had reduced levels of IFN-gamma+ CD8+ T cells 10 days after administration (0.3+/-0.3% PEG vs. 1.7+/-0.5% unmodified). PEGylation did increase NAB levels 2-fold. These results provide some insight about the degree of T and B cell mediated immunity necessary for protection against Ebola virus and suggest that modification of the virus capsid can influence the type of immune response elicited by an Ad5-based vaccine.
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Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.