Atherosclerosis Is Attenuated by Limiting Superoxide Generation in Both Macrophages and Vessel Wall Cells
- 1 December 2007
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in Arteriosclerosis, Thrombosis, and Vascular Biology
- Vol. 27 (12), 2714-2721
- https://doi.org/10.1161/atvbaha.107.152629
Abstract
Objective—We previously showed that NAD(P)H oxidase deficiency significantly reduces atherosclerosis in apoE−/−mice. The present study was designed to determine the relative contribution of monocyte/macrophage versus vascular wall cell NAD(P)H oxidase to atherogenesis in this model.Methods and Results—Cell-specific NAD(P)H oxidase inhibition was achieved via allogenic, sex-mismatched bone marrow transplantation. Aortic atherosclerosis and superoxide production in apoE−/−mice (Control) with functional NAD(P)H oxidase in both monocytes/macrophages and vascular wall cells was compared with that in apoE−/−mice with nonfunctional monocyte/macrophage NAD(P)H oxidase (BMO) or nonfunctional vessel wall NAD(P)H oxidase (VWO). A significant decrease in superoxide production and atherosclerotic lesions was observed in BMO and VWO mice compared with control mice. Interestingly, BMO mice had significantly lower plasma oxidized LDL levels compared with control and VWO mice, whereas aortic sections of VWO mice showed decreased expression of cellular adhesion molecules compared with control and BMO mice. NAD(P)H oxidase deficiency also attenuated neointimal hyperplasia and mitogenic protein activation in apoE−/−mice after arterial injury.Conclusions—We conclude that (1) both monocyte/macrophages and vessel wall cells play critical roles in atherogenesis; (2) decrease in atherosclerosis results from attenuated superoxide generation in monocyte/macrophages or vessel wall cells; and (3) superoxide generation may impact atherosclerosis, in part, by activating smooth muscle cell mitogenic signaling pathways.Keywords
This publication has 25 references indexed in Scilit:
- Noxa1 is a central component of the smooth muscle NADPH oxidase in miceFree Radical Biology & Medicine, 2006
- Thrombin and NAD(P)H Oxidase–Mediated Regulation of CD44 and BMP4-Id Pathway in VSMC, Restenosis, and AtherosclerosisCirculation Research, 2006
- p47phox-Dependent NADPH Oxidase Regulates Flow-Induced Vascular RemodelingCirculation Research, 2005
- Regulation of Superoxide Anion Production by NADPH Oxidase in Monocytes/MacrophagesArteriosclerosis, Thrombosis, and Vascular Biology, 2004
- Endothelin-1 Stimulates Arterial VCAM-1 Expression Via NADPH Oxidase-Derived Superoxide in Mineralocorticoid HypertensionHypertension, 2003
- NAD(P)H Oxidase Mediates Angiotensin II–Induced Vascular Macrophage Infiltration and Medial HypertrophyArteriosclerosis, Thrombosis, and Vascular Biology, 2003
- Superoxide Generation in Directional Coronary Atherectomy Specimens of Patients With Angina PectorisArteriosclerosis, Thrombosis, and Vascular Biology, 2002
- Atherosclerotic Lesions Grow Through Recruitment and Proliferation of Circulating Monocytes in a Murine ModelThe American Journal of Pathology, 2002
- Thrombin Regulates Vascular Smooth Muscle Cell Growth and Heat Shock Proteins via the JAK-STAT PathwayPublished by Elsevier BV ,2001
- Thrombin Generation following Arterial Injury Is a Critical Initiating Event in the Pathogenesis of the Proliferative Stages of the Atherosclerotic ProcessJournal of Vascular Research, 1994