Daniel F. J. Ketelhuth

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The metalloproteinases (MMPs, matrixins) are zinc-containing endopeptidases involved in the metabolism of extracellular matrix as well as in the cleavage of other proteins. The MMP family currently consists of 28 enzymes with somewhat different activities. The members are in part categorized into groups according to either structure or preferred substrates(More)
OBJECTIVE Atherosclerosis is an inflammatory disease. Autoimmune responses to low-density lipoproteins (LDL) contribute to its progression, whereas immunization with LDL may induce atheroprotective or proatherogenic responses. The objective of this study was to develop an atheroprotective vaccine by targeting a peptide of the LDL protein constituent(More)
AIMS Atherosclerosis is a chronic inflammatory disease that is initiated by the retention and accumulation of low-density lipoprotein in the artery, leading to maladaptive response of cells from the immune system and vessel wall. Strong evidence implicates indoleamine 2,3-dioxygenase (IDO), the first and rate-limiting enzyme of the kynurenine pathway of(More)
Atherosclerosis is a chronic inflammatory disease promoted by hyperlipidemia. Several studies support FOXP3-positive regulatory T cells (Tregs) as inhibitors of atherosclerosis; however, the mechanism underlying this protection remains elusive. To define the role of FOXP3-expressing Tregs in atherosclerosis, we used the DEREG mouse, which expresses the(More)
BACKGROUND Atherosclerosis is a chronic inflammatory disease characterized by a massive intimal accumulation of low-density lipoprotein that triggers chronic vascular inflammation with an autoimmune response to low-density lipoprotein components. METHODS AND RESULTS To dampen the inflammatory component of atherosclerosis, we injected hypercholesterolemic(More)
Immune responses to oxidized low-density lipoprotein (oxLDL) are proposed to be important in atherosclerosis. To identify the mechanisms of recognition that govern T cell responses to LDL particles, we generated T cell hybridomas from human ApoB100 transgenic (huB100(tg)) mice that were immunized with human oxLDL. Surprisingly, none of the hybridomas(More)
AIMS Members of the Toll-like receptor (TLR) family initiate innate immune responses and were recently shown to play a role in atherosclerosis. However, the mechanisms that link TLR ligation to vascular inflammation and atherogenesis remain unclear. To identify which signalling pathways downstream of TLRs in immune cells are pro-atherogenic, we analysed the(More)
AIMS Cardiovascular disease is the most common cause of death in the world and atherosclerosis, an inflammatory process in the vessel wall, accounts for the majority of these deaths. The tryptophan metabolite 3-hydroxyanthranilic acid (3-HAA) has been shown to inhibit inflammation in different experimental autoimmune disease models. However, the effect of(More)
Atherosclerosis is a chronic inflammatory disease. Atherosclerotic plaques contain abundant immune cells that can dictate and effect inflammatory responses. Among them, T cells are present during all stages of the disease suggesting that they are essential in the initiation as well as the progression of plaque. Experimental as well as clinical research has(More)
Cardiovascular diseases (CVDs), largely due to atherosclerosis, are the major causes of death in today's world. Atherosclerosis is a chronic inflammatory condition initiated by retention and accumulation of cholesterol-containing lipoproteins, in particular low-density lipoprotein (LDL), in the artery wall. This initiates pathological responses of immune(More)