Evidence map›Paper›PMID 21041484›Full record

ArticleInfection and immunity2011

Effect of factor H-binding protein sequence variation on factor H binding and survival of Neisseria meningitidis in human blood.

Kathleen Y Dunphy, Peter T Beernink, Barbara Brogioni, Dan M Granoff

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2011. 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
4.9field-weighted citation impact, top 5% 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, 30 citations in OpenAlex.

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  12. Vaccines, reverse vaccinology, and bacterial pathogenesis.Cold Spring Harbor perspectives in medicine · 2013
    Article
  13. Defining a protective epitope on factor H binding protein, a key meningococcal virulence factor and vaccine antigen.Proceedings of the National Academy of Sciences of the United States of America · 2013
    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

4 authors at 1 institution in 1 country.

Kathleen Y DunphyCenter for Immunobiology and Vaccine Development, Children's Hospital Oakland Research Institute, 5700 Martin Luther King Jr. Way, Oakland, CA 94609, USA.
Peter T Beernink
Barbara Brogioni
Dan M Granoff
Newron Pharmaceuticals (Italy) · IT

Funding

Novel vaccine strategies for prevention of N. meningitidis group B diseaseR01AI046464 · NIAID · OMVAX, INC. · PI MOE, GREGORY ROBERT · 2000 to 2024
$12.1M
An engineered meningococcal OMV vaccine for Africa against all capsular groupsR01AI082263 · NIAID · CHILDREN'S HOSPITAL & RES CTR AT OAKLAND · PI GRANOFF, DAN M. · 2010 to 2013
$2.1M
CONSTRUCTION OF THE VACCINE CENTERC06RR016226 · NCRR · CHILDREN'S HOSPITAL &RES CTR AT OAKLAND · PI LUCAS, ALEXANDER H. · 2002 to 2002
$2.0M
Identification of vaccine antigens based on expression in bloodR01AI070955 · NIAID · CHILDREN'S HOSPITAL & RES CTR AT OAKLAND · PI BEERNINK, PETER T. · 2008 to 2011
$1.6M
NCRR NIH HHS C06 RR016226NIAID NIH HHS AI 070955NIAID NIH HHS AI 082263NIAID NIH HHS R01 AI 046464NIAID NIH HHS R01 AI046464NIAID NIH HHS R01 AI070955NIAID NIH HHS R01 AI082263
6 · The paper itself

Abstract

Binding of the complement inhibitor factor H (fH) to the surface of Neisseria meningitidis is critical for evasion of innate host defenses. The meningococcal vaccine candidate factor H-binding protein (fHbp) serves as an fH ligand. We prepared 16 recombinant fHbp natural sequence variants. By enzyme-linked immunosorbent assay (ELISA), the variants from a New Zealand epidemic strain (fHbp ID 14) and from an endemic United Kingdom strain (ID 15) showed 10-fold lower fH binding than a reference fHbp from an epidemic Norwegian strain (ID 1). By surface plasmon resonance, association rate constants (k(a)) for fHbp ID 14 and 15 were similar to those for ID 1, but dissociation rate constants (k(d)) were 4- to 10-fold higher than those for ID 1. To determine the effect of fH affinity on fHbp fitness, we prepared isogenic mutants of strain H44/76 that expressed fHbp ID 1, 14, or 15. By flow cytometry, mutants expressing fHbp ID 14 or 15 had lower fH binding than ID 1. When incubated in plasma or blood of nonimmune donors, all three mutants showed similar increases in CFU/ml. In contrast, an isogenic fHbp knockout mutant, which grew well in broth, was rapidly killed in plasma or blood. Thus, although fHbp expression was required for survival of strain H44/76 in blood or plasma, expression of two natural fHbp sequence variants with lower fH affinity had minimal or no effect on nonimmune clearance. One reason may be the high fH concentrations in normal serum, which favor saturation of fH binding to fHbp, even when dissociation rates varied over 10-fold.

Indexed as

Antigens, BacterialBacterial ProteinsBloodCloning, MolecularFlow CytometryGene Expression Regulation, BacterialHumansMutationNeisseria meningitidisPhylogenyProtein BindingAntigens, BacterialBacterial Proteinsfactor H-binding protein, Neisseria meningitidis

Identifiers

PMID21041484
PMCPMC3019890
OpenAlexW2096104218

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.