Evidence map›Paper›PMID 32341768›Full record

ArticleJournal of extracellular vesicles2020

Extracellular vesicles from plasma have higher tumour RNA fraction than platelets.

Kay Brinkman, Lisa Meyer, Anne Bickel, Daniel Enderle, Carola Berking, Johan Skog, Mikkel Noerholm

Open access · goldAbstract read
In one paragraph

Article in Journal of extracellular vesicles, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
1.9field-weighted citation impact, top 14% 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

30 citing papers in PubMed, 39 citations in OpenAlex.

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  16. TEP RNA: a new frontier for early diagnosis of NSCLC.Journal of cancer research and clinical oncology · 2024
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  18. Exploiting the biogenesis of extracellular vesicles for bioengineering and therapeutic cargo loading.Molecular therapy : the journal of the American Society of Gene Therapy · 2023
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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

7 authors at 2 institutions in 2 countries.

Kay BrinkmanExosome Diagnostics GmbH, Martinsried, Germany.
Lisa MeyerExosome Diagnostics GmbH, Martinsried, Germany.
Anne BickelExosome Diagnostics GmbH, Martinsried, Germany.
Daniel EnderleExosome Diagnostics GmbH, Martinsried, Germany.
Carola BerkingDepartment of Dermatology and Allergy, University Hospital Munich (LMU), Munich, Germany.
Johan SkogExosome Diagnostics, Inc., Waltham, MA, USA.
Mikkel NoerholmExosome Diagnostics GmbH, Martinsried, Germany.
Exosome Diagnostics (United States) · USLudwig-Maximilians-Universität München · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In addition to Circulating Tumour Cells (CTCs), cell-free DNA (cfDNA) and Extracellular Vesicles (EVs), the notion of "Tumour-Educated Platelets" (TEP) has recently emerged as a potential source of tumour-derived biomarkers accessible through blood liquid biopsies. Here we sought to confirm the suitability of the platelet blood fraction for biomarker detection in comparison to their corresponding EV fraction. As publications have claimed that tumour RNA and other tumour-derived material are transferred from tumour cells to the platelets and that tumour-derived transcripts can be detected in platelets, we chose to focus on RNA carrying a mutation as being of bona fide tumour origin. After informed consent, we collected prospective blood samples from a cohort of 12 melanoma patients with tissue-confirmed BRAF V600E mutation. Each blood specimen was processed immediately post collection applying two published standard protocols in parallel selecting for EVs and platelets, respectively. The RNA of each fraction was analysed by a highly sensitive ARMS RT-qPCR enabling the quantification of the mutant allele fraction (%MAF) of BRAF V600E down to 0.01%. In a direct comparative analysis, the EV fraction contained detectable BRAF V600E in 10 out of 12 patients, whereas none of the patient platelet fractions resulted in a mutant allele signal. The platelet fraction of all 12 patients contained high amounts of wild-type BRAF signal, but no mutation signal above background was detectable in any of the samples. Our observations suggest that the phenomenon of tumour RNA transfer to platelets occurs below detection limit since even a very sensitive qPCR assay did not allow for a reliable detection of BRAF V600E in the platelet fraction. In contrast, EV fractions derived from the same patients allowed for detection of BRAF V600E in 10 of 12 blood specimens.

Indexed as

BRAF V600EExtracellular vesiclesliquid biopsyplasmaplateletsRNA biomarkertumour RNA

Identifiers

PMID32341768
PMCPMC7170366
OpenAlexW3013028736

What OpenQuestion holds

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Registered trials

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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.