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Details	EV-TRACK ID	Experiment nr.	Species	Sample type	Separation protocol	First author	Year	EV-METRIC
	EV190004	1/1	Homo sapiens	Urine	qEV UF	Eline Oeyen	2019	63%
Study summary Full title Determination of variability due to biological and technical variation in urinary extracellular vesicles as a crucial step in biomarker discovery studies All authors Eline Oeyen, Hanny Willems, Ruben T Kindt, Koen Sandra, Kurt Boonen, Lucien Hoekx, Stefan De Wachter, Filip Ameye and Inge Mertensa Journal J Extracell Vesicles Abstract Urinary extracellular vesicles (EVs) are an attractive source of biomarkers for urological diseases. (show more...)Urinary extracellular vesicles (EVs) are an attractive source of biomarkers for urological diseases. A crucial step in biomarker discovery studies is the determination of the variation parameters to perform a sample size calculation. In this way, a biomarker discovery study with sufficient statistical power can be performed to obtain biologically significant biomarkers. Here, a variation study was performed on both the protein and lipid content of urinary EVs of healthy individuals, aged between 52 and 69 years. Ultrafiltration (UF) in combination with size exclusion chromatography (SEC) was used to isolate the EVs from urine. Different experimental variation set-ups were used in this variation study. The calculated standard deviations (SDs) of the 90% least variable peptides and lipids did not exceed 2 and 1.2, respectively. These parameters can be used in a sample size calculation for a well-designed biomarker discovery study at the cargo of EVs. (hide) EV-METRIC 63% (92nd percentile of all experiments on the same sample type) Reported Not reported Not applicable EV-enriched proteins Protein analysis: analysis of three or more EV-enriched proteins non EV-enriched protein Protein analysis: assessment of a non-EV-enriched protein qualitative and quantitative analysis Particle analysis: implementation of both qualitative and quantitative methods. For the quantitative method, the reporting of measured EV concentration is expected. electron microscopy images Particle analysis: inclusion of a widefield and close-up electron microscopy image density gradient Separation method: density gradient, at least as validation of results attributed to EVs EV density Separation method: reporting of obtained EV density ultracentrifugation specifics Separation method: reporting of g-forces, duration and rotor type of ultracentrifugation steps antibody specifics Protein analysis: antibody clone/reference number and dilution lysate preparation Protein analysis: lysis buffer composition Study data Sample type Urine Sample origin Control condition Focus vesicles extracellular vesicle Separation protocol Separation protocol Gives a short, non-chronological overview of the different steps of the separation protocol. dUC = (Differential) (ultra)centrifugation DG = density gradient UF = ultrafiltration SEC = size-exclusion chromatography IAF = immuno-affinity capture qEV UF Protein markers EV: Flotillin1 non-EV: Proteomics yes Show all info Study aim Identification of content (omics approaches) Sample Species Homo sapiens Sample Type Urine Separation Method Ultra filtration Cut-off size (kDa) 100 Membrane type Regenerated cellulose Commercial kit qEV Other Name other separation method qEV Characterization: Protein analysis Protein Concentration Method BCA Western Blot Detected EV-associated proteins Flotillin1 Proteomics database No Characterization: Lipid analysis No Characterization: Particle analysis NTA Report type Mean Reported size (nm) 108 EV concentration Yes Particle analysis: flow cytometry Hardware adjustment EM EM-type Transmission-EM Image type Close-up, Wide-field Report size (nm) 40-100 Report type Size range/distribution Report size 140-160 EV-concentration No

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EV-TRACK ID	EV190004
species	Homo sapiens
sample type	Urine
condition	Control condition
separation protocol	qEV UF
Exp. nr.	1
EV-METRIC %	63