Evidence map›Paper›PMID 21148506›Full record

ArticleThe Journal of infectious diseases2011

Extracellular loops of the Eschericia coli outer membrane protein A contribute to the pathogenesis of meningitis.

Ravi Maruvada, Kwang Sik Kim

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of infectious diseases, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
2.1field-weighted citation impact, top 12% 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

21 citing papers in PubMed, 44 citations in OpenAlex.

  1. The Role ofVeterinary sciences · 2025
    Article
  2. Meningitis and Bacteremia by Unusual Serotype ofInterdisciplinary perspectives on infectious diseases · 2024
    Article
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  14. Review
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  17. Mouse monoclonal antibody specific for outer membrane protein A of Escherichia coli.Monoclonal antibodies in immunodiagnosis and immunotherapy · 2013
    Article
  18. Article
  19. Article
  20. Review
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 2 institutions in 1 country.

Ravi MaruvadaDivision of Infectious Diseases, Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA. rmaruva1@jhmi.edu
Kwang Sik Kim
Johns Hopkins Medicine · USJohns Hopkins University · US

Funding

PATHOGENESIS OF NEONATAL MENINGITISR01NS026310 · NINDS · JOHNS HOPKINS UNIVERSITY · PI KIM, KWANG S · 1988 to 2008
$3.6M
E. coli invasion of brain endothelial cellsR56NS026310 · NINDS · JOHNS HOPKINS UNIVERSITY · PI KIM, KWANG S · 2009 to 2009
$410k
NINDS NIH HHS NS26310-22NINDS NIH HHS R01 NS026310NINDS NIH HHS R56 NS026310
6 · The paper itself

Abstract

Neonatal meningitis by Eschericia coli RS218 occurs due to bacteremia and its transmigration across the blood-brain barrier. Although the outer membrane protein A (OmpA), a molecule with extracellular loops has been shown to contribute to the above phenomenon, we do not know the exact the role of these individual loops. Using bacterial strains whose individual loops have been removed, we demonstrated that whereas Loops1 and 2 contribute to 70%-80% bacterial survival in serum, bacterial entry into human brain microvascular endothelial cells (HBMEC) is governed by Loops1, 2, and 3. Cellular invasion was shown to require activation of host cytosolic phospholipase A2 (cPLA2α) by Loops1 and 2 but not 3. This suggests 2 distinct pathways for bacterial entry into host cells. Loop 4 played no role in either serum survival, cellular entry, or cPLA2α signaling. These findings demonstrate for the first time the different contributions of extracellular loops of OmpA to the pathogenesis of E. coli meningitis.

Indexed as

Bacterial Outer Membrane ProteinsBlood Bactericidal ActivityCells, CulturedEndothelial CellsEscherichia coliEscherichia coli InfectionsGroup IV Phospholipases A2Host-Pathogen InteractionsHumansInfant, NewbornMeningitis, BacterialMicrobial ViabilitySequence DeletionSerumVirulence FactorsBacterial Outer Membrane ProteinsGroup IV Phospholipases A2OMPA outer membrane proteinsVirulence Factors

Identifiers

PMID21148506
PMCPMC3086434
OpenAlexW2161692211

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.