Evidence map›Paper›PMID 25536933›Full record

ArticleJournal of extracellular vesicles2014

Effect of storage on physical and functional properties of extracellular vesicles derived from neutrophilic granulocytes.

Ákos M Lőrincz, Csaba I Timár, Krisztina A Marosvári, Dániel S Veres, Lilla Otrokocsi, Ágnes Kittel, Erzsébet Ligeti

Abstract read
In one paragraph

Article in Journal of extracellular vesicles, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 145 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
145citing papers in PubMed, 1 pooled it
–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

145 citing papers in PubMed, 1 synthesis or guideline pooled it.

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85 more citing papers are in PubMed but not listed here.

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.

Ákos M LőrinczDepartment of Physiology, Semmelweis University, Budapest, Hungary.
Csaba I TimárDepartment of Physiology, Semmelweis University, Budapest, Hungary.
Krisztina A MarosváriDepartment of Physiology, Semmelweis University, Budapest, Hungary.
Dániel S VeresDepartment of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary.
Lilla OtrokocsiInstitute of Experimental Medicine of the Hungarian Academy of Sciences, Budapest, Hungary.
Ágnes KittelInstitute of Experimental Medicine of the Hungarian Academy of Sciences, Budapest, Hungary.
Erzsébet LigetiDepartment of Physiology, Semmelweis University, Budapest, Hungary; Ligeti@puskin.sote.hu; Ligeti.Erzsebet@med.semmelweis-univ.hu.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimTo carry out a systematic study on the effect of different storage conditions on the number as well as the physical and functional properties of antibacterial extracellular vesicles (EVs) derived from human neutrophilic granulocytes.

methodsProduction of EVs with antibacterial properties was initiated by opsonized Zymosan A particles. The number of released fluorescent EVs was determined by flow cytometry following careful calibration. Physical properties and size of EVs were investigated by flow cytometry, dynamic light scattering and electron microscopy. Functional properties of EVs were tested by bacterial survival assay.

resultsStorage at +20°C or +4°C resulted in a significant decrease of EV number and antibacterial effect after 1 day. Storage at -20°C did not influence the EV number up to 28 days, but induced a shift in EV size and almost complete loss of antibacterial function by 28 days. Storage at -80°C had no significant effect either on EV number or size and allowed partial preservation of the antibacterial function up to 28 days. Snap-freezing did not improve the results, whereas the widely used cryoprotectants induced EV lysis.

conclusionStorage significantly alters both the physical and functional properties of EVs even if the number of EVs stays constant. If storage is needed, EVs should be kept at -80°C, preferably not longer than 7 days. For functional tests, freshly prepared EVs are recommended.

Indexed as

antibacterial effectextracellular vesiclemicrovesiclestorage conditionsvesicle function

Identifiers

PMID25536933
PMCPMC4275651

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.