Evidence map›Paper›PMID 22752907›Full record

ArticleJournal of microbiology (Seoul, Korea)2012

Extracellular stress and lipopolysaccharide modulate Acinetobacter baumannii surface-associated motility.

Christin N McQueary, Benjamin C Kirkup, Yuanzheng Si, Miriam Barlow, Luis A Actis, David W Craft, Daniel V Zurawski

Open access · bronzeAbstract read
PubMed Publisher
In one paragraph

Article in Journal of microbiology (Seoul, Korea), 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 56 papers.

0numbers the graph read from it
0cells of the map it votes in
56citing papers in PubMed
1.5field-weighted citation impact, top 21% 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

56 citing papers in PubMed, 82 citations in OpenAlex.

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  14. Elongation factor P modulatesProceedings of the National Academy of Sciences of the United States of America · 2022
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  15. DNA and cell biology · 2022
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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

7 authors at 3 institutions in 1 country.

Christin N McQuearyDivision of Bacterial and Rickettsial Disease, Department of Wound Infections, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA.
Benjamin C Kirkup
Yuanzheng Si
Miriam Barlow
Luis A Actis
David W Craft
Daniel V Zurawski
Walter Reed Army Institute of Research · USMiami University · USUniversity of California, Merced · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Acinetobacter baumannii is a nosocomial bacterial pathogen, and infections attributed to this species are further complicated by a remarkable ability to acquire antimicrobial resistance genes and to survive in a desiccated state. While the antibiotic resistance and biofilm formation of A. baumannii is well-documented, less is known about the virulence attributes of this organism. Recent studies reported A. baumannii strains display a motility phenotype, which appears to be partially dependent upon Type IV pili, autoinducer molecules, and the response to blue light. In this study, we wanted to determine the prevalence of this trait in genetically diverse clinical isolates, and any additional required factors, and environmental cues that regulate motility. When strains are subjected to a wide array of stress conditions, A. baumannii motility is significantly reduced. In contrast, when extracellular iron is provided or salinity is reduced, motility is significantly enhanced. We further investigated whether the genes required for the production of lipopolysaccharide (lpsB) and K1 capsule (epsA/ptk) are required for motility as demonstrated in other Gram-negative bacteria. Transposon mutagenesis resulted in reduced motility by the insertion derivatives of each of these genes. The presence of the parental allele provided in trans, in the insertion mutant background, could only restore motility in the lpsB mutant. The production of core LPS directly contributes to the motility phenotype, while capsular polysaccharide may have an indirect effect. Further, the data suggest motility is regulated by extracellular conditions, indicating that A. baumannii is actively sensing the environment and responding accordingly.

Indexed as

LocomotionAcinetobacter baumanniiBacterial CapsulesGene DeletionGenes, BacterialIronLipopolysaccharidesMutagenesis, InsertionalSalinityStress, PhysiologicalIronLipopolysaccharides

Identifiers

PMID22752907
OpenAlexW1965528325

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.