Evidence map›Paper›PMID 34188786›Full record

ArticleJournal of extracellular vesicles2021

Extracellular vesicles carry SARS-CoV-2 spike protein and serve as decoys for neutralizing antibodies.

Zach Troyer, Najwa Alhusaini, Caroline O Tabler, Thomas Sweet, Karina Inacio Ladislau de Carvalho, Daniela M Schlatzer, Lenore Carias, Christopher L King, Kenneth Matreyek, John C Tilton

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 55 papers.

0numbers the graph read from it
0cells of the map it votes in
55citing papers in PubMed
5.8field-weighted citation impact, top 3% 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

55 citing papers in PubMed, 87 citations in OpenAlex.

  1. Human brain matters: Navigating the neuropathology of COVID-19.Brain pathology (Zurich, Switzerland) · 2026
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  8. CD169Frontiers in cellular and infection microbiology · 2026
    Article
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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

10 authors at 1 institution in 1 country.

Zach TroyerCenter for Proteomics and Bioinformatics Department of Nutrition School of Medicine Case Western Reserve University Cleveland Ohio USA.ORCID 0000-0002-1821-7334
Najwa AlhusainiCenter for Proteomics and Bioinformatics Department of Nutrition School of Medicine Case Western Reserve University Cleveland Ohio USA.ORCID 0000-0001-6489-1285
Caroline O TablerCenter for Proteomics and Bioinformatics Department of Nutrition School of Medicine Case Western Reserve University Cleveland Ohio USA.ORCID 0000-0001-9503-4673
Thomas SweetCenter for Proteomics and Bioinformatics Department of Nutrition School of Medicine Case Western Reserve University Cleveland Ohio USA.
Karina Inacio Ladislau de CarvalhoCenter for Proteomics and Bioinformatics Department of Nutrition School of Medicine Case Western Reserve University Cleveland Ohio USA.
Daniela M SchlatzerCenter for Proteomics and Bioinformatics Department of Nutrition School of Medicine Case Western Reserve University Cleveland Ohio USA.
Lenore CariasDivision of General Medical Sciences School of Medicine Case Western Reserve University Cleveland Ohio USA.
Christopher L KingDivision of General Medical Sciences School of Medicine Case Western Reserve University Cleveland Ohio USA.
Kenneth MatreyekDepartment of Pathology School of Medicine Case Western Reserve University Cleveland Ohio USA.
John C TiltonCenter for Proteomics and Bioinformatics Department of Nutrition School of Medicine Case Western Reserve University Cleveland Ohio USA.
Case Western Reserve University · US

Funding

Early Drivers of Humoral Immunity to SARS-CoV-2 InfectionsU01CA260539 · NCI · CASE WESTERN RESERVE UNIVERSITY · PI KING, CHRISTOPHER L · 2020 to 2024
$3.4M
Novel approaches to understanding precursor protease autoprocessing in intact virusesR01AI140847 · NIAID · CASE WESTERN RESERVE UNIVERSITY · PI TILTON, JOHN CHRISTIAN · 2019 to 2023
$2.6M
Orbitrap Fusion Lumos Tribrid Mass SpectrometerS10OD026882 · OD · CASE WESTERN RESERVE UNIVERSITY · PI CHANCE, MARK R · 2019 to 2019
$1.0M
Training Program in HIV CureT32AI127201 · NIAID · CASE WESTERN RESERVE UNIVERSITY · PI LEVINE, ALAN DAVID · 2016 to 2020
$919k
NCI NIH HHS U01 CA260539NIAID NIH HHS R01 AI140847NIAID NIH HHS T32 AI127201NIH HHS S10 OD026882
6 · The paper itself

Abstract

In late 2019, a novel coronavirus named severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in Wuhan, China. SARS-CoV-2 and the disease it causes, coronavirus disease 2019 (COVID-19), spread rapidly and became a global pandemic in early 2020. SARS-CoV-2 spike protein is responsible for viral entry and binds to angiotensin converting enzyme 2 (ACE2) on host cells, making it a major target of the immune system - particularly neutralizing antibodies (nAbs) that are induced by infection or vaccines. Extracellular vesicles (EVs) are small membraned particles constitutively released by cells, including virally-infected cells. EVs and viruses enclosed within lipid membranes share some characteristics: they are small, sub-micron particles and they overlap in cellular biogenesis and egress routes. Given their shared characteristics, we hypothesized that EVs released from spike-expressing cells could carry spike and serve as decoys for anti-spike nAbs, promoting viral infection. Here, using mass spectrometry and nanoscale flow cytometry (NFC) approaches, we demonstrate that SARS-CoV-2 spike protein can be incorporated into EVs. Furthermore, we show that spike-carrying EVs act as decoy targets for convalescent patient serum-derived nAbs, reducing their effectiveness in blocking viral entry. These findings have important implications for the pathogenesis of SARS-CoV-2 infection in vivo and highlight the complex interplay between viruses, extracellular vesicles, and the immune system that occurs during viral infections.

Indexed as

Antibodies, NeutralizingCOVID-19COVID-19 SerotherapyExtracellular VesiclesFlow CytometryHEK293 CellsHumansImmunization, PassiveProtein BindingSARS-CoV-2Spike Glycoprotein, CoronavirusAntibodies, NeutralizingSpike Glycoprotein, Coronavirusspike protein, SARS-CoV-2coronavirusdecoyextracellular vesicleneutralizing antibodySARS‐CoV‐2spike

Identifiers

PMID34188786
PMCPMC8213968
OpenAlexW3175675883

What Socratic 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 Socratic graph.