cyclic amp/نخر

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Differential activation of the transcription factor cyclic AMP response element binding protein (CREB) in macrophages following infection with pathogenic and nonpathogenic mycobacteria and role for CREB in tumor necrosis factor alpha production.

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Previous studies in our laboratory have shown a differential activation of the mitogen-activated protein kinases (MAPKs) in primary bone marrow-derived macrophages following infection with pathogenic Mycobacterium avium compared to the activation following infection with nonpathogenic Mycobacterium

Tumor necrosis factor alpha inhibits the stimulatory effect of the parathyroid hormone-related protein on cyclic AMP formation in osteoblast-like cells via protein kinase C+.

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Tumor necrosis factor alpha (TNF alpha) and parathyroid hormone-related protein (PTHrP) are both factors that have been implicated in the mechanism of hypercalcemia of malignancy. In this study we investigated the effect of TNF alpha on the PTHrP-stimulated accumulation of intracellular cyclic AMP

Effects of tumor necrosis factor alpha on parathyroid hormone-induced increases in osteoblastic cell cyclic AMP.

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Tumor necrosis factor alpha (10(-10) - 10(-8) M) had no effects on cyclic AMP production by the osteoblastic osteosarcomal cells, Saos-2 and G292, or normal rat calvarial cells. The cytokine did, however, inhibit the parathyroid hormone (PTH)-induced effect on cyclic AMP in the Saos-2 and normal rat

Cyclic AMP inhibition of tumor necrosis factor alpha production induced by amyloidogenic C-terminal peptide of Alzheimer's amyloid precursor protein in macrophages: involvement of multiple intracellular pathways and cyclic AMP response element binding protein.

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In the present study, we focused on the molecular events involved in tumor necrosis factor-alpha (TNF-alpha) production in response to the amyloidogenic 105-amino acid carboxyl-terminal fragment (CT105) of amyloid precursor protein, a candidate alternative toxic element in Alzheimer's disease

Cyclic AMP-independent activation of transcription factor NF-kappa B in HL60 cells by tumor necrosis factors alpha and beta.

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No correlation exists in HL60 cells between NF-kappa B activation by tumor necrosis factor (TNF alpha) and TNF beta and intracellular levels of cyclic AMP. Cyclic AMP levels did not increase upon treatment of cells with each of these cytokines, although NF-kappa B was activated. Forskolin or

The proximal promoter region is essential for lipopolysaccharide induction and cyclic AMP inhibition of mouse tumor necrosis factor-alpha.

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Bacterial lipopolysaccharide (LPS) induces a rapid and transient increase in transcription of the tumor necrosis factor-alpha (TNF-alpha) gene in cells of monocyte/macrophage lineage. This study examines the role of potential regulatory elements within the proximal promoter region of the mouse

Anthrax edema toxin differentially regulates lipopolysaccharide-induced monocyte production of tumor necrosis factor alpha and interleukin-6 by increasing intracellular cyclic AMP.

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Bacillus anthracis exotoxins mediate most of the symptomatology of severe anthrax. In addition to a clinical syndrome reminiscent of septic shock, which may be mediated by cytokines produced by macrophages stimulated with lethal toxin, infected patients show profound edema at sites of infection.

Inhibitory effect of adrenomedullin on basal and tumour necrosis factor alpha-stimulated endothelin-1 synthesis in bovine aortic endothelial cells is independent of cyclic AMP.

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Adrenomedullin (ADM) is a potent vasodilator and reverses the vasoconstrictor action of endothelin-1 (ET-1). These studies aimed to determine the effect of ADM on ET-1 synthesis in bovine aortic endothelial cells (BAEC) and to identify the possible mechanisms involved. In this cell model, ADM

Cyclic AMP and tumor necrosis factor-alpha regulate CXCR4 gene expression in Schwann cells.

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Rat peripheral nerve Schwann cells have been shown to express the alpha-chemokine receptor CXCR4 as well as the corresponding ligand stromal cell-derived factor-1 (SDF-1). We have investigated gene regulatory mechanisms acting on the expression of CXCR4 in cultured rat Schwann cells and found that

Interleukin-4 suppression of monocyte tumour necrosis factor-alpha production. Dependence on protein synthesis but not on cyclic AMP production.

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The molecular mechanisms by which human interleukin-4 (IL-4) down-regulates tumour necrosis factor-alpha (TNF-alpha) production by monocytes remain unknown. Other studies of IL-4 action in B lymphocytes and large granular lymphocytes (LGL) suggested that IL-4 may suppress mediator production by

Inhibition of tumor necrosis factor-alpha induced neutrophil apoptosis by cyclic AMP: involvement of caspase cascade.

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Treatment of neutrophils with tumor necrosis factor-alpha (TNF-alpha) in the presence of cycloheximide induced apoptosis within 3 h, as evaluated by the occurrence of morphological nuclear changes characteristic of apoptosis. Pretreatment of neutrophils with dibutyryl cyclic AMP (dbcAMP) suppressed

Cyclic AMP mimics, but does not mediate, interleukin-1- and tumour-necrosis-factor-stimulated phospholipase A2 secretion from rat renal mesangial cells.

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We have previously shown that recombinant interleukin 1 (IL-1) and recombinant tumour necrosis factor (TNF) synergistically stimulate phospholipase A2 release from mesangial cells. We now report that treatment of mesangial cells with the beta-agonist salbutamol, prostaglandin E2 (PGE2), cholera

Cilostazol prevents tumor necrosis factor-alpha-induced cell death by suppression of phosphatase and tensin homolog deleted from chromosome 10 phosphorylation and activation of Akt/cyclic AMP response element-binding protein phosphorylation.

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This study examines the signaling mechanism by which cilostazol prevents neuronal cell death. Cilostazol ( approximately 0.1-100 microM) prevented tumor necrosis factor-alpha (TNF-alpha)-induced decrease in viability of SK-N-SH and HCN-1A cells, which was antagonized by 1 microM iberiotoxin, a

Dynamics of dibutyryl cyclic AMP- and prostaglandin E2-mediated suppression of lipopolysaccharide-induced tumor necrosis factor alpha gene expression.

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The regulation of lipopolysaccharide (LPS)-induced tumor necrosis factor alpha (TNF) production by prostaglandin E2 (PGE2), forskolin, and dibutyryl cyclic AMP (cAMP) was examined at the cellular and molecular levels. The above three agents could suppress LPS (100 ng/ml)-stimulated TNF production by

Protection by 16,16-dimethyl prostaglandin E2 and dibutyryl cyclic AMP against complement-mediated hepatic necrosis in rats.

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16,16-Dimethyl prostaglandin E2, a known cytoprotective agent, was examined for its ability to protect the liver against complement-mediated necrosis induced by an intravenous injection of a monoclonal antibody against a rat liver-specific antigen in rats. The hepatic injury induced by the antibody

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