Evidence map›Paper›PMID 34258353›Full record

ArticlePractical laboratory medicine2021

Coupling size exclusion chromatography to ultracentrifugation improves detection of exosomal proteins from human plasma by LC-MS.

Sara Alameldin, Victor Costina, Hesham A Abdel-Baset, Katja Nitschke, Phillip Nuhn, Michael Neumaier, Maren Hedtke

Open access · goldAbstract read
In one paragraph

Article in Practical laboratory medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
2.0field-weighted citation impact, top 12% 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

20 citing papers in PubMed, 27 citations in OpenAlex.

  1. Review
  2. Extracellular Vesicles in Tauopathies: Mechanisms and Applications.International journal of molecular sciences · 2026
    Review
  3. Article
  4. Review
  5. Review
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Review
  12. Review
  13. Review
  14. Review
  15. Review
  16. Article
  17. Article
  18. Recent developments in isolating methods for exosomes.Frontiers in bioengineering and biotechnology · 2022
    Review
  19. Biological Features of Extracellular Vesicles and Challenges.Frontiers in cell and developmental biology · 2022
    Review
  20. 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

7 authors at 2 institutions in 2 countries.

Sara AlameldinInstitute for Clinical Chemistry, Medical Faculty Mannheim of the University of Heidelberg, University Hospital Mannheim, Mannheim, Germany.
Victor CostinaInstitute for Clinical Chemistry, Medical Faculty Mannheim of the University of Heidelberg, University Hospital Mannheim, Mannheim, Germany.
Hesham A Abdel-BasetClinical Pathology Department, Assiut University Hospital, Assiut, Egypt.
Katja NitschkeDepartment of Urology and Urosurgery, Medical Faculty Mannheim of the University of Heidelberg, University Hospital Mannheim, Mannheim, Germany.
Phillip NuhnDepartment of Urology and Urosurgery, Medical Faculty Mannheim of the University of Heidelberg, University Hospital Mannheim, Mannheim, Germany.
Michael NeumaierInstitute for Clinical Chemistry, Medical Faculty Mannheim of the University of Heidelberg, University Hospital Mannheim, Mannheim, Germany.
Maren HedtkeInstitute for Clinical Chemistry, Medical Faculty Mannheim of the University of Heidelberg, University Hospital Mannheim, Mannheim, Germany.
Heidelberg University · DEAssiut University · EG

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesExosomes are small lipid bilayer vesicles that are defined by their endocytic origin and size range of 30-140 nm. They are constantly produced by different cell types, by both healthy and abnormal cells, and can be isolated from almost all body fluids.Little information exists in isolating exosomes from plasma due to the complexity of its content and the presence of contaminating plasma proteins. DESIGN AND

methodsWe carried-out liquid chromatography-mass spectrometry (LC-MS/MS) analyses of plasma-derived vesicles from 4 healthy donors obtained by 2 coupled methodologies: Ultracentrifugation (UC) coupled with size-exclusion chromatography (SEC) to isolate and subsequently enrich exosomes.We compared the proteins detected by UC alone and UC coupled with SEC.

resultsIn the coupled UC + SEC methodology we found 52.25% more proteins enriched in exosomes as CD9, Annexins, YWHAZ (14-3-3 family) and others, than by using UC alone. There is also a reduction of 98.8% of contaminating plasma proteins by coupling UC and SEC in comparison to using UC alone.

conclusionsWe conclude that exosomes can be successfully isolated from plasma using a very simple combination of standard methods, which could largely improve the proteomics profiling of plasma exosomes.

Indexed as

AGO2, Argonaute proteincfNAs, Cell-free nucleic acidsCSF, cerebrospinal fluidctDNA, circulating tumor DNAEVs, extracellular vesiclesExosomesFDR, false discovery rateHuman plasmaILVs, intraluminal vesiclesMass spectrometrymiRNA, microRNAMVBs, multivesicular bodiesSEC, size exclusion chromatographySize-exclusion chromatographyUC, ultracentrifugationUltracentrifugation

Identifiers

PMID34258353
PMCPMC8254000
OpenAlexW3176710204

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.