Sphingomyelinase Induces Aggregation and Fusion, but Phospholipase A2 Only Aggregation, of Low Density Lipoprotein (LDL) Particles
نویسندگان
چکیده
منابع مشابه
Sphingomyelinase Induces Aggregation and Fusion, but Phospholipase A2 Only Aggregation, of Low Density Lipoprotein (LDL) Particles TWO DISTINCT MECHANISMS LEADING TO INCREASED BINDING STRENGTH OF LDL TO HUMAN AORTIC
During atherogenesis, low density lipoprotein (LDL) particles bind to extracellular matrix proteoglycans in the arterial wall, become modified, and appear as aggregated and fused particles. Sphingomyelinase (SMase) and phospholipase A2 (PLA2) have been found in the arterial wall, and, moreover, lesional LDL shows signs of hydrolysis of both sphingomyelin and phosphatidylcholine. We have now stu...
متن کاملSphingomyelinase induces aggregation and fusion of small very low-density lipoprotein and intermediate-density lipoprotein particles and increases their retention to human arterial proteoglycans.
OBJECTIVE Infiltration of low-density lipoprotein (LDL) into subendothelial space is an early step in atherosclerosis. In addition to LDL particles, small very low-density lipoprotein (sVLDL) and intermediate-density lipoprotein (IDL) particles are also able to enter the arterial intima and be retained within the subendothelial extracellular matrix. Here we compared how proteolysis with alpha-c...
متن کاملLipolytic modification of LDL by phospholipase A2 induces particle aggregation in the absence and fusion in the presence of heparin.
One of the first events in atherogenesis is modification of low density lipoprotein (LDL) particles in the arterial wall with ensuing formation of aggregated and fused lipid droplets. The accumulating particles are relatively depleted in phosphatidylcholine (PC). Recently, secretory phospholipase A2 (PLA2), an enzyme capable of hydrolyzing LDL PC into fatty acid and lysoPC molecules, has been f...
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In addition to hypercholesterolemia, chronic arterial inflammation has been shown to be strongly associated with atherosclerosis and cardiovascular disease (CVD) [1]. The accumulation and oxidation of LDL within the intima trigger inflammatory processes within the vessel wall. Certain markers of inflammation, such as C-reactive protein (CRP), soluble CD40 ligand (sCD40L), oxidized LDL, and lipo...
متن کاملLipoprotein-associated phospholipase A2 activity is a marker of small, dense LDL particles in human plasma.
BACKGROUND Recent clinical studies showed that lipoprotein-associated phospholipase A(2) (Lp-PLA(2)) is a predictor for incident atherosclerotic disease. We have previously shown that among the LDL subfractions, Lp-PLA(2) activity is preferentially associated with the atherogenic small, dense (sdLDL) particles in vitro. We investigated whether Lp-PLA(2) could be a marker of sdLDL in human plasm...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1998
ISSN: 0021-9258
DOI: 10.1074/jbc.273.44.29127