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10.1161/01.ATV.0000254674.47693.e8 http://scihub22266oqcxt.onion/10.1161/01.ATV.0000254674.47693.e8 C4568121!4568121 !17158353     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=17158353 &cmd=llinks): Failed to open stream: HTTP request failed! 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Cholesterol enrichment of human monocyte/macrophages induces surface exposure of phosphatidylserine and the release of biologically-active tissue factor-positive microvesicles |pdf=|usr=}}{{17158353 }} gab.com Text Cholesterol enrichment of human monocyte/macrophages induces surface exposure of phosphatidylserine and the release of biologically-active tissue factor-positive microvesicles JO: Arterioscler Thromb Vasc Biol http://www.kidney.de/pget.php?&tw=1&pmid=17158353 #FOAvip OBJECTIVE: Biologically significant amounts of two procoagulant molecules, phosphatidylserine (PS) and tissue factor (TF), are transported by monocyte/macrophage-derived microvesicles (MVs). Because cellular cholesterol accumulation is an important feature of atherosclerotic vascular disease, we now examined effects of cholesterol enrichment on MV release from human monocytes and macrophages. METHODS AND RESULTS: Cholesterol enrichment of human THP-1 monocytes, alone or in combination with lipopolysaccharide (LPS), tripled their total MV generation, as quantified by flow cytometry based on particle size and PS exposure. The subset of these MVs that were also TF-positive was likewise increased by cellular cholesterol enrichment, and these TF-positive MVs exhibited a striking 10-fold increase in procoagulant activity. Moreover, cholesterol enrichment of primary human monocyte-derived macrophages also increased their total as well as TF-positive MV release, and these TF-positive MVs exhibited a similar 10-fold increase in procoagulant activity. To explore the mechanisms of enhanced MV release, we found that cholesterol enrichment of monocytes caused PS exposure on the cell surface by as early as 2 hours and genomic DNA fragmentation in a minority of cells by 20 hours. Addition of a caspase inhibitor at the beginning of these incubations blunted both cholesterol-induced apoptosis and MV release. CONCLUSIONS: Cholesterol enrichment of human monocyte/macrophages induces the generation of highly biologically active, PS-positive MVs, at least in part through induction of apoptosis. Cholesterol-induced monocyte/macrophage MVs, both TF-positive and TF-negative, may be novel contributors to atherothrombosis. Twit Text FOAVip Cholesterol enrichment of human monocyte/macrophages induces surface exposure of phosphatidylserine and the release of biologically-active tissue factor-positive microvesicles ????Arterioscler Thromb Vasc Biol http://www.kidney.de/pget.php?&tw=1&pmid=17158353 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=17158353 #FOAvip English Wikipedia <ref>{{Cite pmid|17158353 }}</ref> Cholesterol enrichment of human monocyte/macrophages induces surface exposure of phosphatidylserine and the release of biologically-active tissue factor-positive microvesicles #MMPMID17158353 Liu ML ; Reilly MP ; Casasanto P ; McKenzie SE ; Williams KJ Arterioscler Thromb Vasc Biol 2007[Feb]; 27 (2 ): 430-5 PMID17158353 show ga OBJECTIVE: Biologically significant amounts of two procoagulant molecules, phosphatidylserine (PS) and tissue factor (TF), are transported by monocyte/macrophage-derived microvesicles (MVs). Because cellular cholesterol accumulation is an important feature of atherosclerotic vascular disease, we now examined effects of cholesterol enrichment on MV release from human monocytes and macrophages. METHODS AND RESULTS: Cholesterol enrichment of human THP-1 monocytes, alone or in combination with lipopolysaccharide (LPS), tripled their total MV generation, as quantified by flow cytometry based on particle size and PS exposure. The subset of these MVs that were also TF-positive was likewise increased by cellular cholesterol enrichment, and these TF-positive MVs exhibited a striking 10-fold increase in procoagulant activity. Moreover, cholesterol enrichment of primary human monocyte-derived macrophages also increased their total as well as TF-positive MV release, and these TF-positive MVs exhibited a similar 10-fold increase in procoagulant activity. To explore the mechanisms of enhanced MV release, we found that cholesterol enrichment of monocytes caused PS exposure on the cell surface by as early as 2 hours and genomic DNA fragmentation in a minority of cells by 20 hours. Addition of a caspase inhibitor at the beginning of these incubations blunted both cholesterol-induced apoptosis and MV release. CONCLUSIONS: Cholesterol enrichment of human monocyte/macrophages induces the generation of highly biologically active, PS-positive MVs, at least in part through induction of apoptosis. Cholesterol-induced monocyte/macrophage MVs, both TF-positive and TF-negative, may be novel contributors to atherothrombosis. |Apoptosis [MESH] |Atherosclerosis/etiology/metabolism/physiopathology [MESH] |Blood Coagulation/physiology [MESH] |Cell Membrane/*metabolism [MESH] |Cells, Cultured [MESH] |Cholesterol/*metabolism [MESH] |Cytoplasmic Vesicles/*metabolism [MESH] |Flow Cytometry [MESH] |Humans [MESH] |Lipopolysaccharides/metabolism/pharmacology [MESH] |Macrophages/cytology/*metabolism [MESH] |Monocytes/cytology/*metabolism [MESH] |Phosphatidylserines/*metabolism [MESH]Cholesterol enrichment of human monocyte/macrophages induces surface e(epmc).pdf DeepDyve Pubget Overpricing