Evidence map›Paper›PMID 38097635›Full record

ArticleNPJ biofilms and microbiomes2023

Csu pili dependent biofilm formation and virulence of Acinetobacter baumannii.

Irfan Ahmad, Aftab Nadeem, Fizza Mushtaq, Nikola Zlatkov, Muhammad Shahzad, Anton V Zavialov, Sun Nyunt Wai, Bernt Eric Uhlin

Open access · goldAbstract read
In one paragraph

Article in NPJ biofilms and microbiomes, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed
6.4field-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

58 citing papers in PubMed, 67 citations in OpenAlex.

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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

8 authors at 3 institutions in 3 countries.

Irfan AhmadDepartment of Molecular Biology and Umeå Centre for Microbial Research (UCMR), Umeå University, SE-90187, Umeå, Sweden. irfan.ahmad@umu.se.ORCID 0000-0002-0470-190X
Aftab NadeemDepartment of Molecular Biology and Umeå Centre for Microbial Research (UCMR), Umeå University, SE-90187, Umeå, Sweden.
Fizza MushtaqDepartment of Molecular Biology and Umeå Centre for Microbial Research (UCMR), Umeå University, SE-90187, Umeå, Sweden.
Nikola ZlatkovDepartment of Molecular Biology and Umeå Centre for Microbial Research (UCMR), Umeå University, SE-90187, Umeå, Sweden.
Muhammad ShahzadDepartment of Pharmacology, University of Health Sciences, Lahore, Pakistan.
Anton V ZavialovDepartment of Biochemistry, University of Turku, Tykistökatu 6A, 20520, Turku, Finland.
Sun Nyunt WaiDepartment of Molecular Biology and Umeå Centre for Microbial Research (UCMR), Umeå University, SE-90187, Umeå, Sweden.ORCID 0000-0003-4793-4671
Bernt Eric UhlinDepartment of Molecular Biology and Umeå Centre for Microbial Research (UCMR), Umeå University, SE-90187, Umeå, Sweden.ORCID 0000-0002-2991-8072
Umeå University · SEUniversity of Health Sciences Lahore · PKUniversity of Turku · FI

Funding

Cancerfonden (Swedish Cancer Society) 2017-419Higher Education Commission, Pakistan (HEC) 8666/Punjab/NRPU/R&D/HEC/2017Kempestiftelserna (Kempe Foundations) SMK21-0076Vetenskapsrådet (Swedish Research Council) 2018-02914Vetenskapsrådet (Swedish Research Council) 2019-01720Vetenskapsrådet (Swedish Research Council) 2020-06136Vetenskapsrådet (Swedish Research Council) 2022-04779
6 · The paper itself

Abstract

Acinetobacter baumannii has emerged as one of the most common extensive drug-resistant nosocomial bacterial pathogens. Not only can the bacteria survive in hospital settings for long periods, but they are also able to resist adverse conditions. However, underlying regulatory mechanisms that allow A. baumannii to cope with these conditions and mediate its virulence are poorly understood. Here, we show that bi-stable expression of the Csu pili, along with the production of poly-N-acetyl glucosamine, regulates the formation of Mountain-like biofilm-patches on glass surfaces to protect bacteria from the bactericidal effect of colistin. Csu pilus assembly is found to be an essential component of mature biofilms formed on glass surfaces and of pellicles. By using several microscopic techniques, we show that clinical isolates of A. baumannii carrying abundant Csu pili mediate adherence to epithelial cells. In addition, Csu pili suppressed surface-associated motility but enhanced colonization of bacteria into the lungs, spleen, and liver in a mouse model of systemic infection. The screening of c-di-GMP metabolizing protein mutants of A. baumannii 17978 for the capability to adhere to epithelial cells led us to identify GGDEF/EAL protein AIS_2337, here denoted PdeB, as a major regulator of Csu pili-mediated virulence and biofilm formation. Moreover, PdeB was found to be involved in the type IV pili-regulated robustness of surface-associated motility. Our findings suggest that the Csu pilus is not only a functional component of mature A. baumannii biofilms but also a major virulence factor promoting the initiation of disease progression by mediating bacterial adherence to epithelial cells.

Indexed as

Acinetobacter baumanniiAnimalsBacterial ProteinsBiofilmsFimbriae, BacterialMiceVirulenceBacterial Proteins

Identifiers

PMID38097635
PMCPMC10721868
OpenAlexW4389742166

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.