Evidence map›Paper›PMID 34669269›Full record

ArticleJournal of extracellular vesicles2021

Label-free characterization of an extracellular vesicle-based therapeutic.

Eleni Priglinger, Juergen Strasser, Boris Buchroithner, Florian Weber, Susanne Wolbank, Daniela Auer, Eva Grasmann, Claudia Arzt, Dmitry Sivun, Johannes Grillari and 3 more

Abstract 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 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
–field-weighted citation impact
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

28 citing papers in PubMed.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Article
  6. Review
  7. Extracellular vesicles: key mediators inFrontiers in veterinary science · 2025
    Review
  8. Article
  9. Review
  10. Article
  11. Review
  12. Article
  13. Article
  14. Isolation and characterization of extracellular vesicles and future directions in diagnosis and therapy.Wiley interdisciplinary reviews. Nanomedicine and nanobiotechnology · 2023
    Review
  15. Article
  16. Review
  17. Article
  18. Review
  19. Review
  20. Article
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

13 authors.

Eleni PriglingerAUVA Research Center, Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Linz/Vienna, Austria.
Juergen StrasserSchool of Medical Engineering and Applied Social Science, University of Applied Sciences Upper Austria, Linz, Austria.
Boris BuchroithnerSchool of Medical Engineering and Applied Social Science, University of Applied Sciences Upper Austria, Linz, Austria.
Florian WeberSchool of Medical Engineering and Applied Social Science, University of Applied Sciences Upper Austria, Linz, Austria.
Susanne WolbankAUVA Research Center, Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Linz/Vienna, Austria.
Daniela AuerGMP Unit, Spinal Cord Injury and Tissue Regeneration Center Salzburg (SCI-TReCS), Paracelsus Medical University, Salzburg, Austria.
Eva GrasmannTransfer Center for Extracellular Vesicles Theralytic Technologies (EV-TT), Paracelsus Medical University, Salzburg, Austria.
Claudia ArztTransfer Center for Extracellular Vesicles Theralytic Technologies (EV-TT), Paracelsus Medical University, Salzburg, Austria.
Dmitry SivunSchool of Medical Engineering and Applied Social Science, University of Applied Sciences Upper Austria, Linz, Austria.
Johannes GrillariAUVA Research Center, Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Linz/Vienna, Austria.
Jaroslaw JacakSchool of Medical Engineering and Applied Social Science, University of Applied Sciences Upper Austria, Linz, Austria.
Johannes PreinerSchool of Medical Engineering and Applied Social Science, University of Applied Sciences Upper Austria, Linz, Austria.
Mario GimonaGMP Unit, Spinal Cord Injury and Tissue Regeneration Center Salzburg (SCI-TReCS), Paracelsus Medical University, Salzburg, Austria.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Interest in mesenchymal stem cell derived extracellular vesicles (MSC-EVs) as therapeutic agents has dramatically increased over the last decade. Current approaches to the characterization and quality control of EV-based therapeutics include particle tracking techniques, Western blotting, and advanced cytometry, but standardized methods are lacking. In this study, we established and verified quartz crystal microbalance (QCM) as highly sensitive label-free immunosensing technique for characterizing clinically approved umbilical cord MSC-EVs enriched by tangential flow filtration and ultracentrifugation. Using QCM in conjunction with common characterization methods, we were able to specifically detect EVs via EV (CD9, CD63, CD81) and MSC (CD44, CD49e, CD73) markers. Furthermore, analysis of QCM dissipation versus frequency allowed us to quantitatively determine the ratio of marker-specific EVs versus non-vesicular particles (NVPs) - a parameter that cannot be obtained by any other technique so far. Additionally, we characterized the topography and elasticity of these EVs by atomic force microscopy (AFM), enabling us to distinguish between EVs and NVPs in our EV preparations. This measurement modality makes it possible to identify EV sub-fractions, discriminate between EVs and NVPs, and to characterize EV surface proteins, all with minimal sample preparation and using label-free measurement devices with low barriers of entry for labs looking to widen their spectrum of characterization techniques. Our combination of QCM with impedance measurement (QCM-I) and AFM measurements provides a robust multi-marker approach to the characterization of clinically approved EV therapeutics and opens the door to improved quality control.

Indexed as

Extracellular VesiclesHumansMesenchymal Stem CellsMicroscopy, Atomic Forceatomic force microscopy (AFM)extracellular vesicles (EVs)label-free sensorsquartz crystal microbalance (QCM)

Identifiers

PMID34669269
PMCPMC8528092

What OpenQuestion holds

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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.