Evidence map›Paper›PMID 11854229›Full record

ArticleInfection and immunity2002

Differential fluorescence induction analysis of Streptococcus pneumoniae identifies genes involved in pathogenesis.

Andrea Marra, Jyoti Asundi, Magdalena Bartilson, Stacey Lawson, Flora Fang, Jillian Christine, Cedric Wiesner, Daniel Brigham, William P Schneider, Alexander E Hromockyj

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2002. 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
7.6field-weighted citation impact, top 2% 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, 99 citations in OpenAlex.

  1. Article
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  4. New Aspects of the Interplay between Penicillin Binding Proteins,Antimicrobial agents and chemotherapy · 2017
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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

10 authors at 1 institution in 1 country.

Andrea MarraProtein Design Labs, Inc., Fremont, California 94555, USA. andrea_marra@groton.pfizer.com
Jyoti Asundi
Magdalena Bartilson
Stacey Lawson
Flora Fang
Jillian Christine
Cedric Wiesner
Daniel Brigham
William P Schneider
Alexander E Hromockyj
PDL BioPharma (United States) · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Differential fluorescence induction (DFI) technology was used to identify promoters of Streptococcus pneumoniae induced under various in vitro and in vivo conditions. A promoter-trap library using green fluorescent protein as the reporter was constructed in S. pneumoniae, and the entire library was screened for clones exhibiting increased gfp expression under the chosen conditions. The in vitro conditions used were chosen to mimic aspects of the in vivo environment encountered by the pathogen once it enters a host: changes in temperature, osmolarity, oxygen, and iron concentration, as well as blood. In addition, the library was used to infect animals in three different models, and clones induced in these environments were identified. Several promoters were identified in multiple screens, and genes whose promoters were induced twofold or greater under the inducing condition were mutated to assess their roles in virulence. A total of 25 genes were mutated, and the effects of the mutations were assessed in at least two different infection models. Over 50% of these mutants were attenuated in at least one infection model. We show that DFI is a useful tool for identifying bacterial virulence factors as well as a means of elucidating the microenvironment encountered by pathogens upon infection.

Indexed as

Genes, BacterialAnimalsDiffusion Chambers, CultureDisease Models, AnimalFemaleFluorescenceGene Expression Regulation, BacterialGene LibraryGenes, ReporterGerbillinaeGreen Fluorescent ProteinsLuminescent ProteinsMaleMiceMutagenesisOtitis MediaGreen Fluorescent ProteinsLuminescent Proteins

Identifiers

PMID11854229
PMCPMC127766
OpenAlexW2130187506

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.