Evidence map›Paper›PMID 26099586›Full record

ArticleInfection and immunity2015

Manipulation of Autophagy in Phagocytes Facilitates Staphylococcus aureus Bloodstream Infection.

Kate M O'Keeffe, Mieszko M Wilk, John M Leech, Alison G Murphy, Maisem Laabei, Ian R Monk, Ruth C Massey, Jodi A Lindsay, Timothy J Foster, Joan A Geoghegan and 1 more

Open access · hybridAbstract read
In one paragraph

Article in Infection and immunity, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 66 papers.

0numbers the graph read from it
0cells of the map it votes in
66citing papers in PubMed
4.4field-weighted citation impact, top 5% 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

66 citing papers in PubMed, 95 citations in OpenAlex.

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  15. Macrophages and the microbiome in chronic obstructive pulmonary disease.European respiratory review : an official journal of the European Respiratory Society · 2024
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  20. LinkingAntibiotics (Basel, Switzerland) · 2024
    Review

6 more citing papers are in PubMed but not listed here.

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

11 authors at 3 institutions in 2 countries.

Kate M O'KeeffeHost Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.
Mieszko M WilkHost Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.
John M LeechHost Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.
Alison G MurphyHost Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.
Maisem LaabeiDepartment of Biology and Biochemistry, University of Bath, Claverton Down, Bath, United Kingdom.
Ian R MonkMicrobiology Department, Moyne Institute of Preventative Medicine, Trinity College Dublin, Dublin, Ireland.
Ruth C MasseyDepartment of Biology and Biochemistry, University of Bath, Claverton Down, Bath, United Kingdom.
Jodi A LindsayInstitute for Infection and Immunity, St. George's, University of London, London, United Kingdom.
Timothy J FosterMicrobiology Department, Moyne Institute of Preventative Medicine, Trinity College Dublin, Dublin, Ireland.
Joan A GeogheganMicrobiology Department, Moyne Institute of Preventative Medicine, Trinity College Dublin, Dublin, Ireland.
Rachel M McLoughlinHost Pathogen Interactions Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland rachel.mcloughlin@tcd.ie.
Trinity College Dublin · IEUniversity of Bath · GBSt George's, University of London · GB

Funding

Wellcome Trust WT086515MA
6 · The paper itself

Abstract

The capacity for intracellular survival within phagocytes is likely a critical factor facilitating the dissemination of Staphylococcus aureus in the host. To date, the majority of work on S. aureus-phagocyte interactions has focused on neutrophils and, to a lesser extent, macrophages, yet we understand little about the role played by dendritic cells (DCs) in the direct killing of this bacterium. Using bone marrow-derived DCs (BMDCs), we demonstrate for the first time that DCs can effectively kill S. aureus but that certain strains of S. aureus have the capacity to evade DC (and macrophage) killing by manipulation of autophagic pathways. Strains with high levels of Agr activity were capable of causing autophagosome accumulation, were not killed by BMDCs, and subsequently escaped from the phagocyte, exerting significant cytotoxic effects. Conversely, strains that exhibited low levels of Agr activity failed to accumulate autophagosomes and were killed by BMDCs. Inhibition of the autophagic pathway by treatment with 3-methyladenine restored the bactericidal effects of BMDCs. Using an in vivo model of systemic infection, we demonstrated that the ability of S. aureus strains to evade phagocytic cell killing and to survive temporarily within phagocytes correlated with persistence in the periphery and that this effect is critically Agr dependent. Taken together, our data suggest that strains of S. aureus exhibiting high levels of Agr activity are capable of blocking autophagic flux, leading to the accumulation of autophagosomes. Within these autophagosomes, the bacteria are protected from phagocytic killing, thus providing an intracellular survival niche within professional phagocytes, which ultimately facilitates dissemination.

Indexed as

AnimalsAutophagyBacteremiaBacterial ProteinsBlotting, WesternBone Marrow CellsCells, CulturedDendritic CellsDisease Models, AnimalFlow CytometryMiceMice, Inbred C57BLMicroscopy, ConfocalReal-Time Polymerase Chain ReactionReverse Transcriptase Polymerase Chain ReactionStaphylococcal InfectionsAgr protein, Staphylococcus aureusBacterial ProteinsTrans-Activators

Identifiers

PMID26099586
PMCPMC4534639
OpenAlexW2142468886

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.