Abstract
Angiopoietin-like protein family 4 (Angptl 4) has been shown to regulate lipoprotein metabolism through the inhibition of lipoprotein lipase (LPL). We generated ApoE-/-Angptl 4-/- mice to study the effect of Angptl 4 deficiency on lipid metabolism and atherosclerosis. Fasting and postolive oil-loaded triglyceride (TG) levels were largely decreased in ApoE-/-Angptl 4-/- mice compared with and ApoE-/-Angptl 4+/+ mice. There was a significant (75 ± 12%) reduction in atherosclerotic lesion size in ApoE-/-Angptl 4-/- mice compared with ApoE-/- Angptl 4+/+ mice. Peritoneal macrophages, isolated from Angptl 4-/- mice to investigate the foam cell formation, showed a significant decrease in newly synthesized cholesteryl ester (CE) accumulation induced by acetyl low-density lipoprotein (acLDL) compared with those from Angptl 4+/+ mice. Thus, genetic knockout of Angptl 4 protects ApoE-/- mice against development and progression of atherosclerosis and strongly suppresses the ability of the macrophages to become foam cells in vitro.
Original language | English |
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Pages (from-to) | 806-811 |
Number of pages | 6 |
Journal | Biochemical and Biophysical Research Communications |
Volume | 379 |
Issue number | 4 |
DOIs | |
Publication status | Published - 20 Feb 2009 |
Externally published | Yes |
Keywords
- Angptl 4
- Apolipoprotein E
- Atherosclerosis
- Foam cell formation
- Foam cells
- Knockout mice
- Lipid metabolism
- Lipoprotein lipase
- Macrophage
- Oxidized low-density lipoprotein
- Postprandial hypertriglyceridemia