Evidence map›Paper›PMID 33574479›Full record

ArticleScientific reports2021

Selective loss of microvesicles is a major issue of the differential centrifugation isolation protocols.

Annamaria Nigro, Annamaria Finardi, Marzia M Ferraro, Daniela E Manno, Angelo Quattrini, Roberto Furlan, Alessandro Romano

Abstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing 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

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

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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.

Annamaria NigroDivision of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific Institute, Via Olgettina, 60, 20132, Milan, Italy.
Annamaria FinardiDivision of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific Institute, Via Olgettina, 60, 20132, Milan, Italy.
Marzia M FerraroDepartment of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy.
Daniela E MannoDepartment of Mathematics and Physics "E. De Giorgi", University of Salento, Lecce, Italy.
Angelo QuattriniDivision of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific Institute, Via Olgettina, 60, 20132, Milan, Italy.
Roberto FurlanDivision of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific Institute, Via Olgettina, 60, 20132, Milan, Italy.
Alessandro RomanoDivision of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific Institute, Via Olgettina, 60, 20132, Milan, Italy. romano.alessandro@hsr.it.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Microvesicles (MVs) are large extracellular vesicles differing in size, cargo and composition that share a common mechanism of release from the cells through the direct outward budding of the plasma membrane. They are involved in a variety of physiological and pathological conditions and represent promising biomarkers for diseases. MV heterogeneity together with the lack of specific markers had strongly hampered the development of effective methods for MV isolation and differential centrifugation remains the most used method to purify MVs. In this study, we analysed the capacity of the differential centrifugation method to isolate MVs from cell-conditioned medium using flow cytometry and TEM/AFM microscopy. We found that the loss of MVs (general population and/or specific subpopulations) represents a major and underestimate drawback of the differential centrifugation protocol. We demonstrate that the choice of the appropriate rotor type (fixed-angle vs swinging-bucket) and the implementation of an additional washing procedure to the first low-speed centrifugation step of the protocol allow to overcome this problem increasing the total amount of isolated vesicles and avoiding the selective loss of MV subpopulations. These parameters/procedures should be routinely employed into optimized differential centrifugation protocols to ensure isolation of the high-quantity/quality MVs for the downstream analysis/applications.

Identifiers

PMID33574479
PMCPMC7878808

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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.