Trial reportJCI insight2024
An intranasally administered adenovirus-vectored SARS-CoV-2 vaccine induces robust mucosal secretory IgA.
Trial report in JCI insight, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.
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
24 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Mucosal immunity and vaccine development.Signal transduction and targeted therapy · 2026Pooled it
- Safety and Immunogenicity of aerosolized adenovirus-vectored COVID-19 vaccine and intramuscular mRNA vaccine bivalent boosters: a randomized open-label clinical trial.Nature communications · 2025Trial
- Research Advances and Biological Features of IgA for Immune-Related Diseases.International journal of molecular sciences · 2026Review
- Intranasal vaccine combining adenovirus and trimeric subunit protein provides superior immunity against SARS-CoV-2 Omicron variant.Nature biomedical engineering · 2026Article
- Article
- Nasal humoral immunity: the first line of protection against respiratory pathogens.ImmunoHorizons · 2026Review
- 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
- A semi-replicating VSV (srVSV)-based platform for developing broad-spectrum mucosal vaccines against influenza A viruses.Virologica Sinica · 2026Article
- Intranasal immunization with live-attenuated RSV-vectored SARS-CoV-2 vaccines elicits antigen-specific systemic and mucosal immunity and protects against viral challenge and natural infection.bioRxiv : the preprint server for biology · 2026Article
- Next-generation mucosal vaccines for respiratory viruses: Immunological correlates, platform design and clinical translation.World journal of virology · 2026Review
- Systematic profiling of SARS-CoV-2 structural protein-specific T cell epitopes in Omicron infections following inactivated vaccination.iScience · 2026Article
- An innovative nasal nanovaccine against SARS-CoV-2 induces systemic and upper airway immunity controlling viral replication.NPJ vaccines · 2026Article
- Intranasal booster drives class switching and homing of memory B cells for mucosal IgA response.JCI insight · 2026Article
- 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
- Universal broad-spectrum mucosal vaccine design for human coronaviruses inspired by artificial antibodies.NPJ vaccines · 2026Article
- Advances and prospects of mucosal vaccination in the prevention and control of avian influenza.Frontiers in immunology · 2026Review
- Adenoviral vector oropharyngeal spray immunization elicits mucosal immunity and protects against heterologous SARS-CoV-2 infection.NPJ vaccines · 2025Article
- Developing the next-generation of adenoviral vector vaccines.Human vaccines & immunotherapeutics · 2025Review
- Advances and prospects of respiratory mucosal vaccines: mechanisms, technologies, and clinical applications.NPJ vaccines · 2025Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
18 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUNDThe level of nasal spike-specific secretory IgA (sIgA) is inversely correlated with the risk of SARS-CoV-2 Omicron infection. This study aimed to evaluate the safety and immunogenicity of intranasal vaccination using Ad5-S-Omicron (NB2155), a replication-incompetent human type 5 adenovirus carrying Omicron BA.1 spike.METHODSAn open-label, single-center, investigator-initiated trial was carried out on 128 health care workers who had never been infected with SARS-CoV-2 and had previously received 2 or 3 injections of inactivated whole-virus vaccines, with the last dose given 3-19 months previously (median 387 days, IQR 333-404 days). Participants received 2 intranasal sprays of NB2155 at 28-day intervals between November 30 and December 30, 2022. Safety was evaluated by solicited adverse events and laboratory tests. The elevation of nasal mucosal spike-specific sIgA and serum neutralizing activities were assessed. All participants were monitored for infection by antigen tests, disease symptoms, and the elevation of nucleocapsid-specific sIgA in the nasal passage.RESULTSThe vaccine-related solicited adverse events were mild. Nasal spike-specific sIgA against 10 strains had a mean geometric mean fold increase of 4.5 after the first dose, but it increased much higher to 51.5 after the second dose. Serum neutralizing titers also increased modestly to 128.1 (95% CI 74.4-220.4) against authentic BA.1 and 76.9 (95% CI 45.4-130.2) against BA.5 at 14 days after the second dose. Due to the lifting of the zero-COVID policy in China on December 7, 2022, 57.3% of participants were infected with BA.5 between days 15 and 28 after the first dose, whereas no participants reported having any symptomatic infections between day 3 and day 90 after the second dose. The elevation of nasal nucleocapsid-specific sIgA on days 0, 14, 42, and 118 after the first dose was assessed to verify that these 2-dose participants had no asymptomatic infections.CONCLUSIONA 2-dose intranasal vaccination regimen using NB2155 was safe, was well tolerated, and could dramatically induce broad-spectrum spike-specific sIgA in the nasal passage. Preliminary data suggested that the intranasal vaccination may establish an effective mucosal immune barrier against infection and warranted further clinical studies.TRIAL REGISTRATIONChinese Clinical Trial Registry (ChiCTR2300070346).FUNDINGNatural Science Foundation of China, Guangzhou Laboratory, The First Affiliated Hospital of Guangzhou Medical University.
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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.