cyclooxygenase/necrosis

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Cyclooxygenase inhibitors prevent the induction of tolerance to the toxic effects of tumor necrosis factor.

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Nonsteroidal anti-inflammatory drugs, such as indomethacin (INDO), prevent acute toxicity caused by a single bolus injection of tumor necrosis factor (TNF). However, when given as a pretreatment to repetitive daily injections of TNF, INDO enhances toxicity. We investigated the effect of INDO on the

Ursolic acid enhances cyclooxygenases and tumor necrosis factor-alpha expression in mouse skin.

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An anti-inflammatory triterpenoid, ursolic acid (UA), has recently been found unexpectedly to induce the release of a pro-inflammatory mediator in resting macrophages. In this study, we found that topical applications of UA to mouse skin twice a week for 2 weeks significantly enhanced mRNA

p38 Mitogen-activated protein kinase stabilizes mRNAs that contain cyclooxygenase-2 and tumor necrosis factor AU-rich elements by inhibiting deadenylation.

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AU-rich elements (AREs) in 3'-untranslated regions of mRNAs confer instability. They target mRNAs for rapid deadenylation and degradation and may enhance decapping. The p38 MAPK pathway stabilizes many otherwise unstable ARE-containing mRNAs encoding proteins involved in inflammation; however, the

Tumor necrosis factor alpha and interleukin-1beta stimulate the expression of cyclooxygenase II but do not alter prostaglandin E2 receptor mRNA levels in cultured dorsal root ganglia cells.

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Tumor necrosis factor alpha (TNFalpha) and interleukin 1beta (IL-1beta) are pro-inflammatory cytokines capable of altering the sensitivity of sensory neurons. Because sensitization elicited by IL-1beta and TNFalpha is blocked by inhibition of the inducible enzyme, cyclooxygenase-II (COX-2), we

Tumor necrosis factor-alpha-induced cyclooxygenase-2 expression in human tracheal smooth muscle cells: involvement of p42/p44 and p38 mitogen-activated protein kinases and nuclear factor-kappaB.

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This study was to determine the mechanism of tumor necrosis factor-alpha (TNF-alpha)-enhanced cyclooxygenase (COX)-2 expression associated with prostaglandin E2 (PGE2) synthesis in human tracheal smooth muscle cells (HTSMCs). TNF-alpha markedly increased COX-2 expression and PGE2 synthesis in a

Cyclooxygenase-2 or tumor necrosis factor-α inhibitors attenuate the mechanotransductive effects of pulsed focused ultrasound to suppress mesenchymal stromal cell homing to healthy and dystrophic muscle.

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Maximal homing of infused stem cells to diseased tissue is critical for regenerative medicine. Pulsed focused ultrasound (pFUS) is a clinically relevant platform to direct stem cell migration. Through mechanotransduction, pFUS establishes local gradients of cytokines, chemokines, trophic factors

Cell-cell contacts trigger programmed necrosis and induce cyclooxygenase-2 expression.

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Necrosis was induced by cell-cell contacts of human dermal fibroblasts in three-dimensional culture. Dramatic induction of cyclooxygenase-2 (COX-2) expression was found throughout these necrotizing cell clusters, whereas no increase in expression of apoptosis markers was seen. The cells were rapidly

Cardiopulmonary effects of tumor necrosis factor-alpha in the piglet: influence of cyclooxygenase inhibition.

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Tumor necrosis factor-alpha (TNF) is believed to play an important role in mediating many of the pathophysiologic changes accompanying bacterial sepsis. In order to characterize the cardiopulmonary responses to TNF in a young animal model and to determine to what extent these changes were secondary

Hyperplastic gastric tumors with spasmolytic polypeptide-expressing metaplasia caused by tumor necrosis factor-alpha-dependent inflammation in cyclooxygenase-2/microsomal prostaglandin E synthase-1 transgenic mice.

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We showed recently that Helicobacter infection induces expression of cyclooxygenase-2 and microsomal prostaglandin E synthase-1 in the mouse stomach, and that transgenic mice expressing both cyclooxygenase-2 and microsomal prostaglandin E synthase-1 (K19-C2mE mice) develop hyperplastic gastric

Differential effects of corticosteroids on the expression of cyclooxygenase-2, tumour necrosis factor-alpha and matrix metalloproteinase-9 in an animal model of migraine.

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Nitric oxide (NO) directly activates trigeminal afferents innervating the dura mater and up-regulates inflammatory mediators. We evaluated NO-mediated up-regulation of cyclooxygenase-2 (COX-2), tumour necrosis factor-alpha (TNF-alpha) and matrix metalloproteinase-9 (MMP-9), and the effect of

Tumor necrosis factor-induced mortality is reversed with cyclooxygenase inhibition.

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OBJECTIVE The authors hypothesized that TNF would induce eicosanoid synthesis, and a cyclooxygenase inhibitor would attenuate both eicosanoid synthesis and improve survival in an LD90 TNF-induced (150 ng/kg/i.v./5 min) mortality model. BACKGROUND Tumor necrosis factor is a cardinal mediator in

Evidence for tumor necrosis factor alpha as a mediator of the toxicity of a cyclooxygenase inhibitor in Gram-negative sepsis.

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To investigate the effect of cyclooxygenase inhibition in experimental Gram-negative sepsis, indomethacin was administered to mice at different times (1 or 5 days, or 1 h) before sublethal infection with an intravenous inoculum of Pseudomonas aeruginosa Early indomethacin exposure did not alter the

Effect of 17-alpha hydroxyprogesterone caproate on the production of tumor necrosis factor-alpha and the expression of cyclooxygenase-2 in lipopolysaccharide-treated gravid human myometrial explants.

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OBJECTIVE To determine whether 17-alpha hydroxyprogesterone (17-OHPC) alters tumor necrosis factor-alpha (TNF-alpha) production and the expression of cyclooxygenase type 2 (COX-2) in myometrium exposed to lipopolysaccharide (LPS). METHODS Lower segment myometrial biopsies were obtained from

Expression of tumor necrosis factor-alpha and cyclooxygenase-2 mRNA in porcine split-thickness wounds treated with epidermal growth factor by quantitative real-time PCR.

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Epidermal growth factor (EGF) accelerates the re-epithelialization of damaged epidermal cell layers in a wound, so it especially shortens the duration of wound healing. The effect of EGF on pro-inflammatory cytokines, tumor necrosis factor-alpha (TNF-alpha) and cyclooxygenase-2 (COX-2), levels

Association of organochlorine pesticides with the mRNA expression of tumour necrosis factor-alpha (TNF-α) & cyclooxygenase-2 (COX-2) genes in idiopathic preterm birth.

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OBJECTIVE Preterm birth (PTB) is an important cause of prenatal death, neonatal morbidity and mortality and adult illness. Increased inflammation occurs in normal parturition, and inflammatory cytokines and oxidative stress are found to be higher in PTB cases. The present study was planned to

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