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OBJECTIVE Obese adipose tissue shows hallmarks of chronic inflammation, which promotes the development of metabolic disorders. The mechanisms by which immune cells interact with each other or with metabolism-associated cell types, and the players involved, are still unclear. The CD40-CD40L costimulatory dyad plays a pivotal role in immune responses and in(More)
The CD40-CD40 ligand (CD40L) signaling axis plays an important role in immunological pathways. Consequently, this dyad is involved in chronic inflammatory diseases, including atherosclerosis. Inhibition of CD40L in apolipoprotein E (Apoe)-deficient (Apoe(-/-)) mice not only reduced atherosclerosis but also conferred a clinically favorable plaque phenotype(More)
CD40 ligand (CD40L), identified as a costimulatory molecule expressed on T cells, is also expressed and functional on platelets. We investigated the thrombotic and inflammatory contributions of platelet CD40L in atherosclerosis. Although CD40L-deficient (Cd40l(-/-)) platelets exhibited impaired platelet aggregation and thrombus stability, the effects of(More)
Inflammatory cytokines are well-recognized mediators of atherosclerosis. Depending on the pathological context, type I interferons (IFNs; IFNalpha and IFNbeta) exert either pro- or anti-inflammatory immune functions, but their exact role in atherogenesis has not been clarified. Here, we demonstrate that IFNbeta enhances macrophage-endothelial cell adhesion(More)
Atherosclerosis is a chronic disease of the large arteries that is responsible for the majority of cardiovascular events. In its pathogenesis, the immune system plays a pivotal role. The effectuation of the immune response through interactions between immune cells that is mediated by co-stimulatory molecules, determine atherosclerosis severity. This review(More)
AIMS The importance of transforming growth factor beta (TGFβ) as an immune regulatory cytokine in atherosclerosis has been established. However, the role of TGFβ signalling in dendritic cells (DCs) and in DC-mediated T cell proliferation and differentiation in atherosclerosis is unknown. METHODS AND RESULTS Here, we investigated the effect of disrupted(More)
CD40-CD40 ligand (CD40L) interactions play a central role in the development and progression of atherosclerosis. In the late 1990s, we and others have shown that complete inhibition of the CD40L signaling pathway resulted in a decrease in atherosclerosis and in the induction of a stable atherosclerotic plaque phenotype. These stable plaques contained high(More)
BACKGROUND Pathological aspects of atherosclerosis are well described, but gene profiles during atherosclerotic plaque progression are largely unidentified. METHODS AND RESULTS Microarray analysis was performed on mRNA of aortic arches of ApoE-/- mice fed normal chow (NC group) or Western-type diet (WD group) for 3, 4.5, and 6 months. Of 10 176 reporters,(More)
We investigated the role of CD40 and CD40L in neointima formation and identified the downstream CD40-signaling intermediates (tumor necrosis factor [TNF]-receptor associated factors [TRAF]) involved. Neointima formation was induced in wild-type, CD40(-/-), CD40L(-/-), and in CD40(-/-) mice that contained a CD40 transgene with or without mutations at the(More)
Modulation of hematopoietic stem and progenitor cells (HSPCs) determines immune cell function. In this study, we investigated how hypercholesterolemia affects HSPC biology and atherosclerosis. Hypercholesterolemia induced loss of HSPC quiescence, characterized by increased proliferation and expression of cyclin B1, C1, and D1, and a decreased expression of(More)