12/15 lipoxygenase mediates monocyte adhesion to aortic endothelium in apolipoprotein E-deficient mice through activation of RhoA and NF-kappaB.

12/15 Lipoxygenase Mediates Monocyte Adhesion to Aortic Endothelium in Apolipoprotein E–Deficient Mice Through Activation of RhoA and NF- B

12/15-lipoxygenase regulates intercellular adhesion molecule-1 expression and monocyte adhesion to endothelium through activation of RhoA and nuclear factor-kappaB.

BACKGROUND 12/15-lipoxygenase (12/15-LO) activity leads to the production of the proinflammatory eicosanoids 12-S-hydroxyeicosatetraenoic acid (12SHETE) and 13-S-hydroxyoctadecadienoic acid. We have previously shown a 3.5-fold increase in endothelial intercellular adhesion molecule (ICAM)-1 expression in mice overexpressing the 12/15-LO gene. We examined whether 12/15-LO activity regulated endo...

Angiotensin II is associated with activation of NF-kappaB-mediated genes and downregulation of PPARs.

Angiotensin II (ANG II) promotes vascular inflammation through nuclear factor-kappaB (NF-kappaB)-mediated induction of pro-inflammatory genes. The role of peroxisome proliferator-activated receptors (PPARs) in modulating vascular inflammation and atherosclerosis in vivo is unclear. The aim of the present study was to examine the effects of ANG II on PPARs and NF-kappaB-dependent pro-inflammator...

Endothelial cell PECAM-1 promotes atherosclerotic lesions in areas of disturbed flow in ApoE-deficient mice.

OBJECTIVE Platelet endothelial cell adhesion molecule-1 (PECAM-1, CD31) has recently been shown to form an essential element of a mechanosensory complex that mediates endothelial responses to fluid shear stress. The aim of this study was to determine the in vivo role of PECAM-1 in atherosclerosis. METHODS AND RESULTS We crossed C57BL/6 Pecam1(-/-) mice with apolipoprotein E-deficient (Apoe(-/...

Oral flavonoid supplementation attenuates atherosclerosis development in apolipoprotein E-deficient mice.

OBJECTIVE Caffeic acid phenethyl ester (CAPE), a natural flavonoid, specifically blocks activation of nuclear factor-kappaB (NF-kappaB). We examined the effects of oral CAPE supplementation on atherogenesis in apolipoprotein E-deficient (apoE-/-) mice. METHODS AND RESULTS Ten-week-old male apoE-/- mice were supplemented orally with CAPE (30 mg/kg body weight) for 12 weeks. At the end of admin...