Evidence map›Paper›PMID 34917089›Full record

ArticleFrontiers in immunology2021

Increased B Cell Selection Stringency In Germinal Centers Can Explain Improved COVID-19 Vaccine Efficacies With Low Dose Prime or Delayed Boost.

Amar K Garg, Soumya Mittal, Pranesh Padmanabhan, Rajat Desikan, Narendra M Dixit

Open access · goldAbstract read
In one paragraph

Article in Frontiers in immunology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
2.0field-weighted citation impact, top 11% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

24 citing papers in PubMed, 34 citations in OpenAlex.

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  3. The immunogenicity of an extended dosing interval of BNT162b2 against SARS-CoV-2 Omicron variant among healthy school-aged children, a randomized controlled trial.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2023
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  12. Mechanistic model for booster doses effectiveness in healthy, cancer, and immunosuppressed patients infected with SARS-CoV-2.Proceedings of the National Academy of Sciences of the United States of America · 2023
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 2 countries.

Amar K GargDepartment of Chemical Engineering, Indian Institute of Science, Bangalore, India.
Soumya MittalDepartment of Chemical Engineering, Indian Institute of Science, Bangalore, India.
Pranesh PadmanabhanClem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane, QLD, Australia.
Rajat DesikanDepartment of Chemical Engineering, Indian Institute of Science, Bangalore, India.
Narendra M DixitDepartment of Chemical Engineering, Indian Institute of Science, Bangalore, India.
Indian Institute of Science Bangalore · INPark Centre for Mental Health · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The efficacy of COVID-19 vaccines appears to depend in complex ways on the vaccine dosage and the interval between the prime and boost doses. Unexpectedly, lower dose prime and longer prime-boost intervals have yielded higher efficacies in clinical trials. To elucidate the origins of these effects, we developed a stochastic simulation model of the germinal center (GC) reaction and predicted the antibody responses elicited by different vaccination protocols. The simulations predicted that a lower dose prime could increase the selection stringency in GCs due to reduced antigen availability, resulting in the selection of GC B cells with higher affinities for the target antigen. The boost could relax this selection stringency and allow the expansion of the higher affinity GC B cells selected, improving the overall response. With a longer dosing interval, the decay in the antigen with time following the prime could further increase the selection stringency, amplifying this effect. The effect remained in our simulations even when new GCs following the boost had to be seeded by memory B cells formed following the prime. These predictions offer a plausible explanation of the observed paradoxical effects of dosage and dosing interval on vaccine efficacy. Tuning the selection stringency in the GCs using prime-boost dosages and dosing intervals as handles may help improve vaccine efficacies.

Indexed as

AntigensB-LymphocytesClonal Selection, Antigen-MediatedCOVID-19COVID-19 VaccinesDose-Response Relationship, ImmunologicGerminal CenterHost-Pathogen InteractionsHumansImmunization, SecondaryModels, TheoreticalSARS-CoV-2VaccinationVaccine EfficacyAntigensCOVID-19 Vaccinesaffinity maturationgerminal center (GC)prime-boost immunizationSARS-CoV-2vaccine efficacy

Identifiers

PMID34917089
PMCPMC8669483
OpenAlexW3214847495

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.