Evidence map›Paper›PMID 28489958›Full record

ArticleVirulence2017

Zinc metalloproteinase ZmpC suppresses experimental pneumococcal meningitis by inhibiting bacterial invasion of central nervous systems.

Masaya Yamaguchi, Masanobu Nakata, Ryuichi Sumioka, Yujiro Hirose, Satoshi Wada, Yukihiro Akeda, Tomoko Sumitomo, Shigetada Kawabata

Abstract read
In one paragraph

Article in Virulence, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing 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

14 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Pneumococcal Encounter With the Blood-Brain Barrier Endothelium.Frontiers in cellular and infection microbiology · 2020
    Review
  8. Article
  9. Frontiers in cellular and infection microbiology · 2019
    Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. 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

8 authors.

Masaya Yamaguchia Department of Oral and Molecular Microbiology , Osaka University Graduate School of Dentistry , Suita , Osaka , Japan.
Masanobu Nakataa Department of Oral and Molecular Microbiology , Osaka University Graduate School of Dentistry , Suita , Osaka , Japan.
Ryuichi Sumiokaa Department of Oral and Molecular Microbiology , Osaka University Graduate School of Dentistry , Suita , Osaka , Japan.
Yujiro Hirosea Department of Oral and Molecular Microbiology , Osaka University Graduate School of Dentistry , Suita , Osaka , Japan.
Satoshi Wadaa Department of Oral and Molecular Microbiology , Osaka University Graduate School of Dentistry , Suita , Osaka , Japan.
Yukihiro Akedab Department of Infection Control and Prevention , Osaka University Graduate School of Medicine , Suita , Osaka , Japan.
Tomoko Sumitomoa Department of Oral and Molecular Microbiology , Osaka University Graduate School of Dentistry , Suita , Osaka , Japan.
Shigetada Kawabataa Department of Oral and Molecular Microbiology , Osaka University Graduate School of Dentistry , Suita , Osaka , Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Streptococcus pneumoniae is a leading cause of bacterial meningitis. Here, we investigated whether pneumococcal paralogous zinc metalloproteases contribute to meningitis onset. Findings of codon-based phylogenetic analyses indicated 3 major clusters in the Zmp family; ZmpA, ZmpC, and ZmpB, with ZmpD as a subgroup. In vitro invasion assays of human brain microvascular endothelial cells (hBMECs) showed that deletion of the zmpC gene in S. pneumoniae strain TIGR4 significantly increased bacterial invasion into hBMECs, whereas deletion of either zmpA or zmpB had no effect. In a mouse meningitis model, the zmpC deletion mutant exhibited increased invasion of the brain and was associated with increased matrix metalloproteinase-9 in plasma and mortality as compared with the wild type. We concluded that ZmpC suppresses pneumococcal virulence by inhibiting bacterial invasion of the central nervous system. Furthermore, ZmpC illustrates the evolutional theory stating that gene duplication leads to acquisition of novel function to suppress excessive mortality.

Indexed as

AnimalsCentral Nervous SystemDisease Models, AnimalFemaleGene DeletionHumansMatrix Metalloproteinase 9Meningitis, PneumococcalMetalloendopeptidasesMiceMice, Inbred ICRPhylogenyStreptococcus pneumoniaeVirulenceMatrix Metalloproteinase 9MetalloendopeptidasesMmp9 protein, mouseZmpB enzymeZmpC protein, Streptococcus pneumoniaeevolutionmeningitisStreptococcus pneumoniaeZmpCZmp family

Identifiers

PMID28489958
PMCPMC5810488

What OpenQuestion holds

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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.