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Details	EV-TRACK ID	Experiment nr.	Species	Sample type	Separation protocol	First author	Year	EV-METRIC
	EV130034	1/1	Homo sapiens	Semen	(d)(U)C DG SEC	Brouwers JF	2013	38%
Study summary Full title Distinct lipid compositions of two types of human prostasomes All authors Brouwers JF, Aalberts M, Jansen JW, van Niel G, Wauben MH, Stout TA, Helms JB, Stoorvogel W Journal Proteomics Abstract Prostasomes are vesicles secreted by prostate epithelial cells and found in abundance in seminal pla (show more...)Prostasomes are vesicles secreted by prostate epithelial cells and found in abundance in seminal plasma. They regulate aspects of sperm cell function and are also thought to prevent immune-mediated destruction of sperm cells within the female reproductive tract. In a previous study, we isolated two distinct populations of prostasomes, differing both in size and protein composition, from the seminal fluid of vasectomized men. In the current study, we characterized the lipid content of these two prostasome populations. Both prostasome types had an unusual lipid composition, with high levels of sphingomyelin (SM), cholesterol, and glycosphingolipids at the expense of, in particular, phosphatidylcholine. The different classes of glycerophospholipids consisted mainly of mono-unsaturated species. The sphingosine-based lipids, SM and the hexosylceramides, were characterized by a near absence of unsaturated species. The two types of prostasome differed in lipid composition, particularly with regard to the relative contributions of SM and hexosylceramides. Potential implications of the lipid compositions of prostasomes for the mechanisms of their formation and function are discussed. (hide) EV-METRIC 38% (68th 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 Semen Sample origin NAY Focus vesicles Prostasomes 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 DG SEC Protein markers EV: CD9 non-EV: PSCA Proteomics no Show all info Study aim Omics Sample Species Homo sapiens Sample Type Semen Separation Method (Differential) (ultra)centrifugation dUC: centrifugation steps Between 10,000 g and 50,000 g Pelleting performed No Density gradient Lowest density fraction 0.4 Highest density fraction 2 Orientation Top-down Speed (g) 100000 Characterization: Protein analysis Western Blot Detected EV-associated proteins CD9 Detected contaminants PSCA Characterization: Particle analysis EM EM-type cryo EM Image type Close-up

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EV-TRACK ID	EV130034
species	Homo sapiens
sample type	Semen
condition	NAY
separation protocol	(d)(U)C DG SEC
Exp. nr.	1
EV-METRIC %	38