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Results list Study Tree Most used separation protocols Top EV-enriched proteins

Details	EV-TRACK ID	Experiment nr.	Species	Sample type	separation protocol	First author	Year	EV-METRIC
	EV110050	1/2	Rattus norvegicus/rattus	Cell culture supernatant	DG dUC IAF	Müller G	2011	43%
Study summary Full title Microvesicles released from rat adipocytes and harboring glycosylphosphatidylinositol-anchored proteins transfer RNA stimulating lipid synthesis All authors Müller G, Schneider M, Biemer-Daub G, Wied S Journal Cell Signal Abstract Small microvesicles, such as microparticles and exosomes, have been demonstrated to transfer protein (show more...)Small microvesicles, such as microparticles and exosomes, have been demonstrated to transfer proteins and nucleic acids from a variety of donor to acceptor cells with corresponding (patho)physiological consequences. Recently the in vitro transfer of glycosylphosphatidylinositol (GPI)-anchored proteins from microvesicles released from large rat adipocytes to intracellular lipid droplets (LDs) of small adipocytes has been shown to be upregulated by physiological (palmitate, H(2)O(2)) and pharmacological (anti-diabetic sulfonylurea drug glimepiride) stimuli and to increase the esterification into as well as to reduce the release of fatty acids from triacylglycerol. Here microvesicles derived from (preferentially large) rat adipocytes or plasma and harboring the GPI-anchored proteins, Gce1 and CD73, were demonstrated to contain specific transcripts and microRNAs that are both transferred into and expressed in acceptor adipocytes and are involved in the upregulation of lipogenesis and cell size. The transferred transcripts were specific for fatty acid esterification (glycerol-3-phosphate acyltransferase-3, diacylglycerol acyltransferase-2), lipid droplet biogenesis (FSP27, caveolin-1) and adipokines (leptin, adiponectin). The transfer and lipogenic activity were more efficient for small rather than large acceptor adipocytes and significantly upregulated by palmitate, glimepiride and H(2)O(2). Together the data suggest that microvesicles released from large adipocytes stimulate lipid storage in small adipocytes by mediating horizontal transfer of lipogenic information which is encoded by relevant (micro)RNA and GPI-anchored protein species. Paracrine and endocrine regulation of lipid storage and, in parallel, cell size of white adipocytes by specific (micro)RNAs in GPI-anchored protein-harboring microvesicles may represent a novel target for interference with metabolic diseases, such as obesity and metabolic syndrome. (hide) EV-METRIC 43% (74th 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 Cell culture supernatant Sample origin DNF Focus vesicles microvesicles 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 DG + dUC + IAF Adj. k-factor 9.06 (pelleting) Protein markers EV: non-EV: Proteomics no EV density (g/ml) 1.12-1.22 Show all info Study aim Function Sample Species Rattus norvegicus/rattus Sample Type Cell culture supernatant Separation Method (Differential) (ultra)centrifugation dUC: centrifugation steps Between 800 g and 10,000 g Equal to or above 150,000 g Pelleting: time(min) 30 Pelleting: rotor type A110 Pelleting: adjusted k-factor 9.06 Density gradient Only used for validation of main results 1 Density medium Sucrose Lowest density fraction 10 Highest density fraction 70 Orientation Top-down Speed (g) 100000 NA

	EV110050	2/2	Rattus norvegicus/rattus	Serum	DG dUC IAF	Müller G	2011	29%
Study summary Full title Microvesicles released from rat adipocytes and harboring glycosylphosphatidylinositol-anchored proteins transfer RNA stimulating lipid synthesis All authors Müller G, Schneider M, Biemer-Daub G, Wied S Journal Cell Signal Abstract Small microvesicles, such as microparticles and exosomes, have been demonstrated to transfer protein (show more...)Small microvesicles, such as microparticles and exosomes, have been demonstrated to transfer proteins and nucleic acids from a variety of donor to acceptor cells with corresponding (patho)physiological consequences. Recently the in vitro transfer of glycosylphosphatidylinositol (GPI)-anchored proteins from microvesicles released from large rat adipocytes to intracellular lipid droplets (LDs) of small adipocytes has been shown to be upregulated by physiological (palmitate, H(2)O(2)) and pharmacological (anti-diabetic sulfonylurea drug glimepiride) stimuli and to increase the esterification into as well as to reduce the release of fatty acids from triacylglycerol. Here microvesicles derived from (preferentially large) rat adipocytes or plasma and harboring the GPI-anchored proteins, Gce1 and CD73, were demonstrated to contain specific transcripts and microRNAs that are both transferred into and expressed in acceptor adipocytes and are involved in the upregulation of lipogenesis and cell size. The transferred transcripts were specific for fatty acid esterification (glycerol-3-phosphate acyltransferase-3, diacylglycerol acyltransferase-2), lipid droplet biogenesis (FSP27, caveolin-1) and adipokines (leptin, adiponectin). The transfer and lipogenic activity were more efficient for small rather than large acceptor adipocytes and significantly upregulated by palmitate, glimepiride and H(2)O(2). Together the data suggest that microvesicles released from large adipocytes stimulate lipid storage in small adipocytes by mediating horizontal transfer of lipogenic information which is encoded by relevant (micro)RNA and GPI-anchored protein species. Paracrine and endocrine regulation of lipid storage and, in parallel, cell size of white adipocytes by specific (micro)RNAs in GPI-anchored protein-harboring microvesicles may represent a novel target for interference with metabolic diseases, such as obesity and metabolic syndrome. (hide) EV-METRIC 29% (79th 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 Serum Sample origin DNF Focus vesicles microvesicles 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 DG + dUC + IAF Protein markers EV: non-EV: Proteomics no EV density (g/ml) 1.12-1.22 Show all info Study aim Function Sample Species Rattus norvegicus/rattus 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: time(min) 120 Density gradient Only used for validation of main results 1 Density medium Sucrose Lowest density fraction 10 Highest density fraction 70 Orientation Top-down Speed (g) 100000 NA

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