Michael Tencati

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OBJECTIVE In endotoxemia, lipopolysaccharide (LPS) induces a systemic inflammatory response and intravascular coagulation. Monocytes orchestrate the innate immune response to LPS by expressing a variety of pro-inflammatory cytokines, such as tumor necrosis factor-alpha (TNF-alpha), and the procoagulant molecule, tissue factor (TF). In this study, we(More)
Sepsis is associated with a systemic activation of coagulation and an excessive inflammatory response. Anticoagulants have been shown to inhibit both coagulation and inflammation in sepsis. In this study, we used both genetic and pharmacologic approaches to analyze the role of tissue factor and protease-activated receptors in coagulation and inflammation in(More)
Fetal loss in patients with antiphospholipid (aPL) antibodies has been ascribed to thrombosis of placental vessels. However, we have shown that inflammation, specifically activation of complement with generation of the anaphylotoxin C5a, is an essential trigger of fetal injury. In this study, we analyzed the role of the procoagulant molecule tissue factor(More)
BACKGROUND The tissue-specific pattern of tissue factor (TF) expression suggests that it plays a major role in the hemostatic protection of specific organs, such as the heart and lung. In support of this notion, we found that mice expressing very low levels of TF exhibit hemostatic defects in the heart and lung. Hemosiderosis and fibrosis are observed in(More)
LPS stimulation of monocytes/macrophages induces the expression of genes encoding proinflammatory cytokines and the procoagulant protein, tissue factor. Induction of these genes is mediated by various signaling pathways, including mitogen-activated protein kinases, and several transcription factors, including Egr-1, AP-1, ATF-2, and NF-kappaB. We used a(More)
OBJECTIVE Oxidative stress contributes to the pathogenesis of many diseases, including atherosclerosis and sepsis. We have previously described a novel class of therapeutic compounds with antioxidant and antiinflammatory properties. However, at present, the intracellular targets of these compounds have not been identified. The purpose of this study was to(More)
Tissue factor (TF) is the primary activator of the coagulation cascade. During endotoxemia, TF expression leads to disseminated intravascular coagulation. However, the relative contribution of TF expression by different cell types to the activation of coagulation has not been defined. In this study, we investigated the effect of either a selective(More)
We have developed a model system of human fibrosarcoma cell lines that do or do not possess and express an oncogenic mutant allele of N-ras. HT1080 cells contain an endogenous mutant allele of N-ras, whereas the derivative MCH603 cell line contains only wild-type N-ras. In an earlier study (S. Gupta et al., Mol. Cell. Biol. 20:9294-9306, 2000), we had shown(More)
Insulin is used to control pro-inflammatory hyperglycemia in critically ill patients. However, recent studies suggest that insulin-induced hypoglycemia may negate its beneficial effects in these patients. It is noteworthy that recent evidence indicates that insulin has anti-inflammatory effects that are independent of controlling hyperglycemia. To date, the(More)
Glucocorticoids, such as dexamethasone (Dex), are used clinically in the treatment of various inflammatory diseases. Dex acts by inhibiting the expression of inflammatory mediators, such as tumor necrosis factor alpha (TNF-alpha) and monocyte chemoattractant protein-1 (MCP-1). It is surprising that Dex enhances bacterial lipopolysaccharide (LPS) induction(More)