Evidence map›Paper›PMID 32497056›Full record

ArticlePloS one2020

Detection of extracellular vesicles in plasma and urine of prostate cancer patients by flow cytometry and surface plasmon resonance imaging.

Linda G Rikkert, Leonie de Rond, Annemieke van Dam, Ton G van Leeuwen, Frank A W Coumans, Theo M de Reijke, Leon W M M Terstappen, Rienk Nieuwland

Open access · goldAbstract readComparative Study
In one paragraph

Article in PloS one, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
1.5field-weighted citation impact, top 18% 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

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 30 citations in OpenAlex.

  1. Guideline
  2. Review
  3. The Dilution Paradox in Extracellular Vesicle Flow Cytometry.Journal of extracellular vesicles · 2026
    Article
  4. Review
  5. Article
  6. Uromodulin and the study of urinary extracellular vesicles.Journal of extracellular biology · 2024
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Extracellular Vesicles in Human Milk.Pharmaceuticals (Basel, Switzerland) · 2021
    Review
  13. Article
  14. Article
  15. Review
  16. Extracellular vesicles in urological malignancies.Biochimica et biophysica acta. Reviews on cancer · 2021
    Review
  17. Review
  18. Review
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 2 institutions in 1 country.

Linda G RikkertDepartment of Medical Cell BioPhysics, University of Twente, Enschede, The Netherlands.ORCID 0000-0002-4325-740X
Leonie de RondLaboratory of Experimental Clinical Chemistry, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Annemieke van DamBiomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Ton G van LeeuwenVesicle Observation Center, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Frank A W CoumansLaboratory of Experimental Clinical Chemistry, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Theo M de ReijkeDepartment of Urology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Leon W M M TerstappenDepartment of Medical Cell BioPhysics, University of Twente, Enschede, The Netherlands.
Rienk NieuwlandLaboratory of Experimental Clinical Chemistry, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
Amsterdam University Medical Centers · NLUniversity of Twente · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Large (> 1 μm) tumor-derived extracellular vesicles (tdEVs) enriched from the cell fraction of centrifuged whole blood are prognostic in metastatic castration-resistant prostate cancer (mCRPC) patients. However, the highest concentration of tdEVs is expected in the cell-free plasma fraction. In this pilot study, we determine whether mCRPC patients can be discriminated from healthy controls based on detection of tdEVs (< 1μm, EpCAM+) and/or other EVs, in cell-free plasma and/or urine. The presence of marker+ EVs in plasma and urine samples from mCRPC patients (n = 5) and healthy controls (n = 5) was determined by flow cytometry (FCM) and surface plasmon resonance imaging (SPRi) using an antibody panel and lactadherin. For FCM, the concentrations of marker positive (+) particles and EVs (refractive index <1.42) were determined. Only the lactadherin+ particle and EV concentration in plasma measured by FCM differed significantly between patients and controls (p = 0.017). All other markers did not result in signals exceeding the background on both FCM and SPRi, or did not differ significantly between patients and controls. In conclusion, no difference was found between patients and controls based on the detection of tdEVs. For FCM, the measured sample volumes are too small to detect tdEVs. For SPRi, the concentration of tdEVs is probably too low to be detected. Thus, to detect tdEVs in cell-free plasma and/or urine, EV enrichment and/or concentration is required. Furthermore, we recommend testing other markers and/or a combination of markers to discriminate mCRPC patients from healthy controls.

Indexed as

AdenocarcinomaAgedAged, 80 and overAntigens, SurfaceBiomarkers, TumorCell Line, TumorCulture Media, ConditionedExtracellular VesiclesFlow CytometryHumansMaleMilk ProteinsNeoplasm ProteinsPilot ProjectsProstatic Neoplasms, Castration-ResistantSurface Plasmon ResonanceAntigens, SurfaceBiomarkers, TumorCulture Media, ConditionedMFGE8 protein, humanMilk ProteinsNeoplasm Proteins

Identifiers

PMID32497056
PMCPMC7272016
OpenAlexW3034035236

What OpenQuestion holds

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LicenceCC BY
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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.