Evidence map›Paper›PMID 11254549›Full record

ArticleInfection and immunity2001

Differential regulation of Bvg-activated virulence factors plays a role in Bordetella pertussis pathogenicity.

S M Kinnear, R R Marques, N H Carbonetti

Abstract read
In one paragraph

Article in Infection and immunity, 2001. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
–field-weighted citation impact
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

10 citing papers in PubMed.

  1. Article
  2. Article
  3. Review
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. 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

3 authors.

S M KinnearDepartment of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA.
R R Marques
N H Carbonetti

Funding

DETOXIFIED BACTERIAL TOXINS AS CTL VACCINE MOLECULESR21AI038979 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI CARBONETTI, NICHOLAS H. · 1997 to 1997
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BORDETELLA PERTUSSIS VIRULENCE FACTOR GENE REGULATIONR29AI032946 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI CARBONETTI, NICHOLAS H. · 1992 to 1996
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NIAID NIH HHS AI32946NIAID NIH HHS AI38979
6 · The paper itself

Abstract

Bordetella pertussis, the causative agent of whooping cough, regulates expression of many virulence factors via a two-component signal transduction system encoded by the bvgAS regulatory locus. It has been shown by transcription activation kinetics that several of the virulence factors are differentially regulated. fha is transcribed within 10 min following a bvgAS-inducing signal, while prn is transcribed after 1 h and ptx is not transcribed until 2 to 4 h after induction. These genes therefore represent early, intermediate, and late classes of bvg-activated promoters, respectively. Although there have been many insightful studies into the mechanisms of BvgAS-mediated regulation, the role that differential regulation of virulence genes plays in B. pertussis pathogenicity has not been characterized. We provide evidence that alterations to the promoter regions of bvg-activated genes can alter the kinetic pattern of expression of these genes without changing steady-state transcription levels. In addition, B. pertussis strains containing these promoter alterations that express either ptx at an early time or fha at a late time demonstrate a significant reduction in their ability to colonize respiratory tracts in an intranasal mouse model of infection. These data suggest a role for differential regulation of bvg-activated genes, and therefore for the BvgAS regulatory system, in the pathogenicity of B. pertussis.

Indexed as

Fimbriae ProteinsGene Expression Regulation, BacterialAnimalsBacterial Outer Membrane ProteinsBacterial ProteinsBordetella pertussisCHO CellsCricetinaeFemaleLungMiceMice, Inbred BALB CPromoter Regions, GeneticReverse Transcriptase Polymerase Chain ReactionTranscription FactorsVirulenceBacterial Outer Membrane ProteinsBacterial ProteinsBvgA protein, BacteriabvgS protein, Bordetella pertussisFimbriae ProteinsfimC protein, BordetellaTranscription FactorsVirulence Factors, Bordetella

Identifiers

PMID11254549
PMCPMC98121

What OpenQuestion holds

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Registered trials

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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.