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Details	EV-TRACK ID	Experiment nr.	Species	Sample type	Separation protocol	First author	Year	EV-METRIC
	EV140064	2/2	Homo sapiens	Serum	(d)(U)C ExoQuick	Caradec J	2014	25%
Study summary Full title Reproducibility and efficiency of serum-derived exosome extraction methods All authors Caradec J, Kharmate G, Hosseini-Beheshti E, Adomat H, Gleave M, Guns E Journal Clin Biochem Abstract OBJECTIVES: Exosomes are emerging as a source of biomarkers with putative prognostic and diagnostic (show more...)OBJECTIVES: Exosomes are emerging as a source of biomarkers with putative prognostic and diagnostic value. However, little is known about the efficiency, reproducibility and reliability of the protocols routinely used to quantify exosomes in the human serum. DESIGN AND METHODS: We used increasing amounts of the same serum sample to isolate exosomes using two different methods: ultracentrifugation onto a sucrose cushion and ExoQuick™. Quantitative analysis of serum-derived exosomes was performed by determining protein concentration (BCA assay) and the number of nanoparticles (Nanosight™ technology). Exosome quality was assessed by Coomassie staining and Western blotting for CD9, LAMP2 exosomal markers and a negative marker Grp94. RESULTS: Correlation between serum volume and the number of isolated exosomes is significant for both methods when exosomes are quantified using protein concentration. However, when the number of nanoparticles is used to quantify exosomes, ExoQuick™ is the only reproducible and efficient method. CD9, LAMP2 and Grp94 exosomal markers are equivalently expressed in both methods. However, exosomes isolated using ultracentrifuge method are strongly contaminated with albumin and IgG. CONCLUSION: ExoQuick™ is an efficient and reproducible method to isolate exosomes for quantitative studies, whereas ultracentrifugation is not. Moreover, high albumin contamination of ultracentrifuged-derived exosomes impairs the use of protein concentration as a mean to quantify serum-derived exosomes. (hide) EV-METRIC 25% (67th 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 Serum Sample origin NAY Focus vesicles exosomes 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 (d)(U)C ExoQuick Protein markers EV: LAMP2/ CD9 non-EV: Albumin/ HSP90B1/ Cell organelle protein Proteomics no Show all info Study aim Technical Sample Species Homo sapiens Sample Type Serum Separation Method Commercial kit ExoQuick Other Name other separation method ExoQuick Characterization: Protein analysis Western Blot Antibody details provided? No Detected EV-associated proteins CD9/ LAMP2 Detected contaminants Cell organelle protein/ Albumin/ HSP90B1 ELISA Antibody details provided? No Detected EV-associated proteins LAMP2 Characterization: Particle analysis NTA EM EM-type transmission EM Image type Close-up

	EV140064	1/2	Homo sapiens	Serum	(d)(U)C DC	Caradec J	2014	22%
Study summary Full title Reproducibility and efficiency of serum-derived exosome extraction methods All authors Caradec J, Kharmate G, Hosseini-Beheshti E, Adomat H, Gleave M, Guns E Journal Clin Biochem Abstract OBJECTIVES: Exosomes are emerging as a source of biomarkers with putative prognostic and diagnostic (show more...)OBJECTIVES: Exosomes are emerging as a source of biomarkers with putative prognostic and diagnostic value. However, little is known about the efficiency, reproducibility and reliability of the protocols routinely used to quantify exosomes in the human serum. DESIGN AND METHODS: We used increasing amounts of the same serum sample to isolate exosomes using two different methods: ultracentrifugation onto a sucrose cushion and ExoQuick™. Quantitative analysis of serum-derived exosomes was performed by determining protein concentration (BCA assay) and the number of nanoparticles (Nanosight™ technology). Exosome quality was assessed by Coomassie staining and Western blotting for CD9, LAMP2 exosomal markers and a negative marker Grp94. RESULTS: Correlation between serum volume and the number of isolated exosomes is significant for both methods when exosomes are quantified using protein concentration. However, when the number of nanoparticles is used to quantify exosomes, ExoQuick™ is the only reproducible and efficient method. CD9, LAMP2 and Grp94 exosomal markers are equivalently expressed in both methods. However, exosomes isolated using ultracentrifuge method are strongly contaminated with albumin and IgG. CONCLUSION: ExoQuick™ is an efficient and reproducible method to isolate exosomes for quantitative studies, whereas ultracentrifugation is not. Moreover, high albumin contamination of ultracentrifuged-derived exosomes impairs the use of protein concentration as a mean to quantify serum-derived exosomes. (hide) EV-METRIC 22% (64th 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 Serum Sample origin NAY Focus vesicles exosomes 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 (d)(U)C DC Protein markers EV: LAMP2/ CD9 non-EV: Albumin/ HSP90B1/ Cell organelle protein Proteomics no Show all info Study aim Technical Sample Species Homo sapiens Sample Type Serum Separation Method (Differential) (ultra)centrifugation dUC: centrifugation steps Between 10,000 g and 50,000 g Between 100,000 g and 150,000 g Pelleting performed Yes Pelleting: time(min) 70 Characterization: Protein analysis Western Blot Antibody details provided? No Detected EV-associated proteins CD9/ LAMP2 Detected contaminants Cell organelle protein/ Albumin/ HSP90B1 ELISA Antibody details provided? No Detected EV-associated proteins LAMP2 Characterization: Particle analysis NTA EM EM-type transmission EM Image type Close-up

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EV-TRACK ID	EV140064
species	Homo sapiens
sample type	Serum
condition	NAY
separation protocol	(d)(U)C ExoQuick	(d)(U)C DC
Exp. nr.	2	1
EV-METRIC %	25	22