Evidence map›Paper›PMID 32939236›Full record

ArticleJournal of extracellular vesicles2020

Salivary extracellular vesicles inhibit Zika virus but not SARS-CoV-2 infection.

Carina Conzelmann, Rüdiger Groß, Min Zou, Franziska Krüger, André Görgens, Manuela O Gustafsson, Samir El Andaloussi, Jan Münch, Janis A Müller

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 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
4.0field-weighted citation impact, top 6% 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

26 citing papers in PubMed, 38 citations in OpenAlex.

  1. Review
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  8. Review
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  11. Extracellular Vesicles inInternational journal of molecular sciences · 2024
    Review
  12. Review
  13. Salivary Extracellular Vesicles: Biomarkers and Beyond in Human Diseases.International journal of molecular sciences · 2023
    Review
  14. Article
  15. 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

9 authors at 2 institutions in 3 countries.

Carina ConzelmannInstitute of Molecular Virology, Ulm University Medical Center, Ulm, Germany.
Rüdiger GroßInstitute of Molecular Virology, Ulm University Medical Center, Ulm, Germany.ORCID https://orcid.org/0000-0003-0355-7915
Min ZouInstitute of Molecular Virology, Ulm University Medical Center, Ulm, Germany.
Franziska KrügerInstitute of Molecular Virology, Ulm University Medical Center, Ulm, Germany.
André GörgensDepartment of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden.ORCID https://orcid.org/0000-0001-9198-0857
Manuela O GustafssonDepartment of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden.
Samir El AndaloussiDepartment of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden.ORCID https://orcid.org/0000-0003-4468-9113
Jan MünchInstitute of Molecular Virology, Ulm University Medical Center, Ulm, Germany.ORCID https://orcid.org/0000-0001-7316-7141
Janis A MüllerInstitute of Molecular Virology, Ulm University Medical Center, Ulm, Germany.
Universität Ulm · DEKarolinska Institutet · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Zika virus (ZIKV) is mainly transmitted via mosquitos, but human-to-human transmissions also occur. The virus is shed into various body fluids including saliva, which represents a possible source of viral transmission. Thus, we here explored whether human saliva affects ZIKV infectivity. We found that physiological concentrations of pooled saliva dose-dependently inhibit ZIKV infection of monkey and human cells by preventing viral attachment to target cells. The anti-ZIKV activity in saliva could not be abrogated by boiling, suggesting the antiviral factor is not a protein. Instead, we found that purified extracellular vesicles (EVs) from saliva inhibit ZIKV infection. Salivary EVs (saEVs) express typical EV markers such as tetraspanins CD9, CD63 and CD81 and prevent ZIKV attachment to and infection of target cells at concentrations that are naturally present in saliva. The anti-ZIKV activity of saliva is conserved but the magnitude of inhibition varies between individual donors. In contrast to ZIKV, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), predominantly spreading via respiratory droplets, is not affected by saliva or saEVs. Our findings provide a plausible explanation for why ZIKV transmission via saliva, i.e. by deep kissing have not been recorded and establish a novel oral innate immune defence mechanism against some viral pathogens.

Indexed as

antiviralexosomesExtracellular vesiclesflavivirusinhibitionsalivaSARS-CoV-2transmissionZika virus

Identifiers

PMID32939236
PMCPMC7480612
OpenAlexW3080599095

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.