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Experiment number
  • If needed, multiple experiments were identified in a single publication based on differing sample types, separation protocols and/or vesicle types of interest.
Species
  • Species of origin of the EVs.
Separation protocol
  • Gives a short, non-chronological overview of the different steps of the separation protocol.
    • (d)(U)C = (differential) (ultra)centrifugation
    • DG = density gradient
    • UF = ultrafiltration
    • SEC = size-exclusion chromatography
Details EV-TRACK ID Experiment nr. Species Sample type separation protocol First author Year EV-METRIC
EV130034 1/1 Homo sapiens Semen DG
(d)(U)C
Brouwers JF 2013 38%

Study summary

Full title
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% (65th 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
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
DNF
Focus vesicles
Prostasomes
Separation protocol
Separation protocol
  • Gives a short, non-chronological overview of the
    different steps of the separation protocol.
    • (d)(U)C = (differential) (ultra)centrifugation
    • DG = density gradient
    • UF = ultrafiltration
    • SEC = size-exclusion chromatography
DG + (d)(U)C
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 ultracentrifugation
centrifugation steps
Between 10,000 g and 50,000 g
Density gradient
Density medium
Sucrose
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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