Evidence map›Paper›PMID 24972036›Full record

ArticlePloS one2014

Respiratory infections cause the release of extracellular vesicles: implications in exacerbation of asthma/COPD.

Suffwan Eltom, Nicole Dale, Kristof R G Raemdonck, Christopher S Stevenson, Robert J Snelgrove, Pradeep K Sacitharan, Chiara Recchi, Silene Wavre-Shapton, Daniel F McAuley, Cecilia O'Kane and 2 more

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03010592 (Studying the Airway Microenvironment in Patients Undergoing Surgical and Bronchoscopic Interventions for COPD), which is not on this map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
1.9field-weighted citation impact, top 15% 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.

NCT03010592 unknown statusnot on this mapstarted 2017, after this paper: background citation

Studying the Airway Microenvironment in Patients Undergoing Surgical and Bronchoscopic Interventions for COPD

TypeobservationalSponsorRoyal Brompton & Harefield NHS Foundation TrustRan2017 to 2023Enrolled80ConditionsChronic Obstructive Pulmonary Disease, Emphysema, Chronic Bronchitis
3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 1 synthesis or guideline pooled it, 36 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Review
  5. Preventive effect of total flavonoids ofAnnals of translational medicine · 2022
    Article
  6. Review
  7. Review
  8. Article
  9. Article
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  11. Extracellular Vesicles and Asthma-More Than Just a Co-Existence.International journal of molecular sciences · 2021
    Review
  12. Review
  13. Review
  14. Review
  15. Review
  16. Review
  17. Article
  18. Review
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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

12 authors at 5 institutions in 1 country.

Suffwan EltomRespiratory Pharmacology, Imperial College, London, United Kingdom.
Nicole DaleRespiratory Pharmacology, Imperial College, London, United Kingdom.
Kristof R G RaemdonckRespiratory Pharmacology, Imperial College, London, United Kingdom.
Christopher S StevensonNovartis, Horsham, United Kingdom.
Robert J SnelgroveLeukocyte Biology, Imperial College, London, United Kingdom.
Pradeep K SacitharanRespiratory Pharmacology, Imperial College, London, United Kingdom.
Chiara RecchiMolecular Medicine, Imperial College, London, United Kingdom.
Silene Wavre-ShaptonInstitute of Ophthalmology, University College London, London, United Kingdom.
Daniel F McAuleyCentre for Infection and Immunity, Queen's University of Belfast, Belfast, United Kingdom.
Cecilia O'KaneCentre for Infection and Immunity, Queen's University of Belfast, Belfast, United Kingdom.
Maria G BelvisiRespiratory Pharmacology, Imperial College, London, United Kingdom; MRC-Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College, London, United Kingdom.
Mark A BirrellRespiratory Pharmacology, Imperial College, London, United Kingdom; MRC-Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College, London, United Kingdom.
Imperial College London · GBQueen's University Belfast · GBAsthma UK · GBNovartis (United Kingdom) · GBUniversity College London · GB

Funding

Medical Research Council G1000758
6 · The paper itself

Abstract

backgroundInfection-related exacerbations of respiratory diseases are a major health concern; thus understanding the mechanisms driving them is of paramount importance. Despite distinct inflammatory profiles and pathological differences, asthma and COPD share a common clinical facet: raised airway ATP levels. Furthermore, evidence is growing to suggest that infective agents can cause the release of extracellular vesicle (EVs) in vitro and in bodily fluids. ATP can evoke the P2X7/caspase 1 dependent release of IL-1β/IL-18 from EVs; these cytokines are associated with neutrophilia and are increased during exacerbations. Thus we hypothesized that respiratory infections causes the release of EVs in the airway and that the raised ATP levels, present in respiratory disease, triggers the release of IL-1β/IL-18, neutrophilia and subsequent disease exacerbations.

methodsTo begin to test this hypothesis we utilised human cell-based assays, ex vivo murine BALF, in vivo pre-clinical models and human samples to test this hypothesis.

resultsData showed that in a murine model of COPD, known to have increased airway ATP levels, infective challenge causes exacerbated inflammation. Using cell-based systems, murine models and samples collected from challenged healthy subjects, we showed that infection can trigger the release of EVs. When exposed to ATP the EVs release IL-1β/IL-18 via a P2X7/caspase-dependent mechanism. Furthermore ATP challenge can cause a P2X7 dependent increase in LPS-driven neutrophilia.

conclusionsThis preliminary data suggests a possible mechanism for how infections could exacerbate respiratory diseases and may highlight a possible signalling pathway for drug discovery efforts in this area.

Indexed as

Adenosine TriphosphateAnimalsAsthmaCaspasesCell-Derived MicroparticlesCell Line, TumorHumansInterleukin-18Interleukin-1betaLipopolysaccharidesMaleMiceMice, Inbred C57BLPulmonary Disease, Chronic ObstructiveReceptors, Purinergic P2X7Respiratory Tract InfectionsAdenosine TriphosphateCaspasesInterleukin-18Interleukin-1betaLipopolysaccharidesReceptors, Purinergic P2X7

Identifiers

PMID24972036
PMCPMC4074193
OpenAlexW2099423734

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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.