Evidence map›Paper›PMID 12841855›Full record

ArticleBMC microbiology2003

The three extra-cellular zinc metalloproteinases of Streptococcus pneumoniae have a different impact on virulence in mice.

Damiana Chiavolini, Guido Memmi, Tiziana Maggi, Francesco Iannelli, Gianni Pozzi, Marco R Oggioni

Open access · goldAbstract read
In one paragraph

Article in BMC microbiology, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
2.8field-weighted citation impact, top 9% 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

34 citing papers in PubMed, 71 citations in OpenAlex.

  1. Article
  2. Loss of Streptococcus pneumoniae iga Causes More Severe Keratitis in Mice.Investigative ophthalmology & visual science · 2026
    Article
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  6. Review
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  9. Review
  10. The Role of Pneumococcal Virulence Factors in Ocular Infectious Diseases.Interdisciplinary perspectives on infectious diseases · 2018
    Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. 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

6 authors at 1 institution in 1 country.

Damiana ChiavoliniDipartimento di Biologia Molecolare, Laboratorio di Microbiologia Molecolare e Biotecnologia, Università di Siena, Siena, Italy. chiavolini@unisi.it
Guido Memmi
Tiziana Maggi
Francesco Iannelli
Gianni Pozzi
Marco R Oggioni
University of Siena · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundStreptococcus pneumoniae possesses large zinc metalloproteinases on its surface. To analyse the importance in virulence of three of these metalloproteinases, intranasal challenge of MF1 outbred mice was carried out using a range of infecting doses of wild type and knock-out pneumococcal mutant strains, in order to compare mice survival.

resultsObservation of survival percentages over time and detection of LD50s of knock out mutants in the proteinase genes in comparison to the type 4 TIGR4 wild type strain revealed two major aspects: i) Iga and ZmpB, present in all strains of S. pneumoniae, strongly contribute to virulence in mice; (ii) ZmpC, only present in about 25% of pneumococcal strains, has a lower influence on virulence in mice.

conclusionsThese data suggest Iga, ZmpB and ZmpC as candidate surface proteins responsible for pneumococcal infection and potentially involved in distinct stages of pneumococcal disease.

Indexed as

Pneumococcal InfectionsAnimalsDisease Models, AnimalFemaleMetalloendopeptidasesMetalloproteasesMiceSerine EndopeptidasesStreptococcus pneumoniaeVirulenceZincIgA-specific serine endopeptidaseMetalloendopeptidasesMetalloproteasesSerine EndopeptidasesZincZmpB enzymeZmpC protein, Streptococcus pneumoniae

Identifiers

PMID12841855
PMCPMC166150
OpenAlexW1549694950

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.