Evidence map›Paper›PMID 34322205›Full record

ArticleJournal of extracellular vesicles2021

Molecular evaluation of five different isolation methods for extracellular vesicles reveals different clinical applicability and subcellular origin.

Rosanne E Veerman, Loes Teeuwen, Paulo Czarnewski, Gözde Güclüler Akpinar, AnnSofi Sandberg, Xiaofang Cao, Maria Pernemalm, Lukas M Orre, Susanne Gabrielsson, Maria Eldh

Open access · goldAbstract read
In one paragraph

Article in Journal of extracellular vesicles, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 207 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
207citing papers in PubMed, 1 pooled it
18.0field-weighted citation impact, top 1% 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

207 citing papers in PubMed, 1 synthesis or guideline pooled it, 304 citations in OpenAlex.

  1. Pooled it
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  5. Sequential-RSC pharmaceutics · 2026
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147 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

10 authors at 3 institutions in 1 country.

Rosanne E VeermanDepartment of Clinical Immunology and Transfusion Medicine and Division of Immunology and Allergy, Department of Medicine Solna Karolinska University Hospital and Karolinska Institutet Stockholm Sweden.
Loes TeeuwenDepartment of Clinical Immunology and Transfusion Medicine and Division of Immunology and Allergy, Department of Medicine Solna Karolinska University Hospital and Karolinska Institutet Stockholm Sweden.
Paulo CzarnewskiScience for Life Laboratory Department of Biochemistry and Biophysics National Bioinformatics Infrastructure Sweden Stockholm University Solna Sweden.ORCID 0000-0001-8150-4021
Gözde Güclüler AkpinarDepartment of Clinical Immunology and Transfusion Medicine and Division of Immunology and Allergy, Department of Medicine Solna Karolinska University Hospital and Karolinska Institutet Stockholm Sweden.
AnnSofi SandbergDepartment of Oncology and Pathology Karolinska Institutet Science for Life Laboratory Solna Sweden.
Xiaofang CaoDepartment of Oncology and Pathology Karolinska Institutet Science for Life Laboratory Solna Sweden.
Maria PernemalmDepartment of Oncology and Pathology Karolinska Institutet Science for Life Laboratory Solna Sweden.ORCID 0000-0003-4624-031X
Lukas M OrreDepartment of Oncology and Pathology Karolinska Institutet Science for Life Laboratory Solna Sweden.ORCID 0000-0002-0384-1003
Susanne GabrielssonDepartment of Clinical Immunology and Transfusion Medicine and Division of Immunology and Allergy, Department of Medicine Solna Karolinska University Hospital and Karolinska Institutet Stockholm Sweden.ORCID 0000-0003-1771-1346
Maria EldhDepartment of Clinical Immunology and Transfusion Medicine and Division of Immunology and Allergy, Department of Medicine Solna Karolinska University Hospital and Karolinska Institutet Stockholm Sweden.ORCID 0000-0003-2173-1796
Karolinska University Hospital · SEScience for Life Laboratory · SEStockholm University · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Extracellular vesicles (EVs) are increasingly tested as therapeutic vehicles and biomarkers, but still EV subtypes are not fully characterised. To isolate EVs with few co-isolated entities, a combination of methods is needed. However, this is time-consuming and requires large sample volumes, often not feasible in most clinical studies or in studies where small sample volumes are available. Therefore, we compared EVs rendered by five commonly used methods based on different principles from conditioned cell medium and 250 μl or 3 ml plasma, that is, precipitation (ExoQuick ULTRA), membrane affinity (exoEasy Maxi Kit), size-exclusion chromatography (qEVoriginal), iodixanol gradient (OptiPrep), and phosphatidylserine affinity (MagCapture). EVs were characterised by electron microscopy, Nanoparticle Tracking Analysis, Bioanalyzer, flow cytometry, and LC-MS/MS. The different methods yielded samples of different morphology, particle size, and proteomic profile. For the conditioned medium, Izon 35 isolated the highest number of EV proteins followed by exoEasy, which also isolated fewer non-EV proteins. For the plasma samples, exoEasy isolated a high number of EV proteins and few non-EV proteins, while Izon 70 isolated the most EV proteins. We conclude that no method is perfect for all studies, rather, different methods are suited depending on sample type and interest in EV subtype, in addition to sample volume and budget.

Indexed as

Extracellular VesiclesFlow CytometryAdultCell FractionationCell LineCentrifugation, Density GradientChemistry Techniques, AnalyticalChromatography, GelCulture Media, ConditionedFemaleFractional PrecipitationHumansMaleMass SpectrometryMiddle AgedProteomicsCulture Media, ConditionediodixanolTriiodobenzoic AcidsEV isolationEVsexosomesextracellular vesiclesmicrovesiclesMVplasmaproteomicssubpopulations

Identifiers

PMID34322205
PMCPMC8298890
OpenAlexW3184374917

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.