Evidence map›Paper›PMID 32460764›Full record

ArticleBMC veterinary research2020

Evaluation of the recombinant proteins RlpB and VacJ as a vaccine for protection against Glaesserella parasuis in pigs.

Samantha J Hau, Shi-Lu Luan, Crystal L Loving, Tracy L Nicholson, Jinhong Wang, Sarah E Peters, David Seilly, Lucy A Weinert, Paul R Langford, Andrew N Rycroft and 5 more

Open access · goldAbstract readEvaluation Study
In one paragraph

Article in BMC veterinary research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
0.8field-weighted citation impact, top 30% 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

7 citing papers in PubMed, 8 citations in OpenAlex.

  1. Article
  2. Research progress onFrontiers in veterinary science · 2025
    Review
  3. Review
  4. Article
  5. Frontiers in veterinary science · 2023
    Review
  6. Article
  7. Article
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

15 authors at 6 institutions in 3 countries.

Samantha J HauUSDA, ARS, National Animal Disease Center, 1920 Dayton Ave, Ames, IA, 50010, USA.
Shi-Lu LuanDepartment of Veterinary Medicine, University of Cambridge, Cambridge, UK.
Crystal L LovingUSDA, ARS, National Animal Disease Center, 1920 Dayton Ave, Ames, IA, 50010, USA.
Tracy L NicholsonUSDA, ARS, National Animal Disease Center, 1920 Dayton Ave, Ames, IA, 50010, USA.
Jinhong WangDepartment of Veterinary Medicine, University of Cambridge, Cambridge, UK.
Sarah E PetersDepartment of Veterinary Medicine, University of Cambridge, Cambridge, UK.
David SeillyDepartment of Veterinary Medicine, University of Cambridge, Cambridge, UK.
Lucy A WeinertDepartment of Veterinary Medicine, University of Cambridge, Cambridge, UK.
Paul R LangfordSection of Paediatric Infectious Diseases, Department of Infectious Disease, Imperial College London, St. Mary's Campus, London, UK.
Andrew N RycroftThe Royal Veterinary College, Hawkshead Campus, Hatfield, UK.
Brendan W WrenFaculty of Infectious & Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK.
Duncan J MaskellDepartment of Veterinary Medicine, University of Cambridge, Cambridge, UK.
Alexander W TuckerDepartment of Veterinary Medicine, University of Cambridge, Cambridge, UK.
Susan L BrockmeierUSDA, ARS, National Animal Disease Center, 1920 Dayton Ave, Ames, IA, 50010, USA. Susan.Brockmeier@ars.usda.gov.ORCID http://orcid.org/0000-0001-8636-3280
BRaDP1T Consortium
University of Cambridge · GBNational Animal Disease Center · USLondon School of Hygiene & Tropical Medicine · GBRoyal Veterinary College · GBSt Mary's Hospital · GBThe University of Melbourne · AU

Funding

Biotechnology and Biological Sciences Research Council BB/G018553/1Biotechnology and Biological Sciences Research Council BB/G019177/1Biotechnology and Biological Sciences Research Council BB/G019274/1Biotechnology and Biological Sciences Research Council BB/G020744/1Biotechnology and Biological Sciences Research Council BB/G020744/1, BB/G019177/1, BB/G019274/1 and BB/G018553/1
6 · The paper itself

Abstract

backgroundGlaesserella parasuis, the causative agent of Glӓsser's disease, is widespread in swine globally resulting in significant economic losses to the swine industry. Prevention of Glӓsser's disease in pigs has been plagued with an inability to design broadly protective vaccines, as many bacterin based platforms generate serovar or strain specific immunity. Subunit vaccines are of interest to provide protective immunity to multiple strains of G. parasuis. Selected proteins for subunit vaccination should be widespread, highly conserved, and surface exposed.

resultsTwo candidate proteins for subunit vaccination (RlpB and VacJ) against G. parasuis were identified using random mutagenesis and an in vitro organ culture system. Pigs were vaccinated with recombinant RlpB and VacJ, outer membrane proteins with important contributions to cellular function and viability. Though high antibody titers to the recombinant proteins and increased interferon-γ producing cells were found in subunit vaccinated animals, the pigs were not protected from developing systemic disease.

conclusionsIt appears there may be insufficient RlpB and VacJ exposed on the bacterial surface for antibody to bind, preventing high RlpB and VacJ specific antibody titers from protecting animals from G. parasuis. Additionally, this work confirms the importance of utilizing the natural host species when assessing the efficacy of vaccine candidates.

Indexed as

AnimalsAntibodies, BacterialBacterial ProteinsBacterial VaccinesHaemophilus InfectionsHaemophilus parasuisHaemophilus VaccinesRecombinant ProteinsSerogroupSus scrofaSwineSwine DiseasesTissue Culture TechniquesVaccinationVaccines, SubunitAntibodies, BacterialBacterial ProteinsBacterial VaccinesHaemophilus VaccinesRecombinant ProteinsVaccines, SubunitGlaesserella parasuisGlässer’s diseaseSubunit vaccine

Identifiers

PMID32460764
PMCPMC7252510
OpenAlexW3028862709

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.