Evidence map›Paper›PMID 11292725›Full record

ArticleInfection and immunity2001

BrkA protein of Bordetella pertussis inhibits the classical pathway of complement after C1 deposition.

M G Barnes, A A Weiss

Open access · greenAbstract 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 41 papers.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed
1.7field-weighted citation impact, top 17% 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

41 citing papers in PubMed, 72 citations in OpenAlex.

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  13. Comparative Integrated Omics Analysis of the Hfq Regulon inInternational journal of molecular sciences · 2019
    Article
  14. Article
  15. Article
  16. Article
  17. Virulence Associated Gene 8 ofFrontiers in immunology · 2018
    Article
  18. Article
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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

2 authors at 1 institution in 1 country.

M G BarnesDepartment of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati, Cincinnati, Ohio 45267, USA.
A A Weiss
University of Cincinnati · US

Funding

COMPLEMENT RESISTANCE IN BORDETELLA PERTUSSISR01AI038415 · NIAID · UNIVERSITY OF CINCINNATI · PI WEISS, ALISON A. · 1997 to 2000
$165k
NIAID NIH HHS R01 AI38415
6 · The paper itself

Abstract

Bordetella pertussis produces a 73-kDa protein, BrkA (Bordetella resistance to killing), which inhibits the bactericidal activity of complement. In this study we characterized the step in the complement cascade where BrkA acts, using three strains: a wild-type strain, a strain containing an insertional disruption of brkA, and a strain containing two copies of the brkA locus. Following incubation with 10% human serum, killing was greatest for the BrkA mutant, followed by that for the wild-type strain, while the strain with two copies of brkA was the most resistant. Complement activation was monitored by enzyme-linked immunosorbent assay (ELISA) or Western blotting. ELISAs for SC5b-9, the soluble membrane attack complex, showed that production of SC5b-9 was greatest with the brkA mutant, less with the wild type, and least with the strain containing two copies of brkA. Deposition of complement proteins on the bacteria was monitored by Western blotting. A decrease in deposition on the bacteria of C4, C3, and C9 corresponded with decreased complement sensitivity. Deposition of C1, however, was not affected by the presence of BrkA. These studies show that BrkA inhibits the classical pathway of complement activation and prevents accumulation of deposited C4.

Indexed as

Complement Pathway, ClassicalBacterial Outer Membrane ProteinsComplement C1Complement C1qComplement C4Complement Membrane Attack ComplexHot TemperatureHumansBacterial Outer Membrane ProteinsBrkA protein, Bordetella pertussisComplement C1Complement C1qComplement C4Complement Membrane Attack Complex

Identifiers

PMID11292725
PMCPMC98261
OpenAlexW2122198495

What OpenQuestion holds

Textmetadata
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.