prostaglandin/necroză

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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

Isolation of saponins with the inhibitory effect on nitric oxide, prostaglandin E2 and tumor necrosis factor-alpha production from Pleurospermum kamtschaticum.

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As an attempt to search for bioactive natural products exerting antiinflammatory activity, we have isolated two saponins were isolated from the aerial portion of Pleurospermum kamtschaticum (Umbelliferae) by nitrite assay activity-directed chromatographic fractionation. They were identified as

Role of prostaglandin and thromboxane biosynthesis in gastric necrosis produced by taurocholate and ethanol.

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The effects of a new selective inhibitor of thromboxane biosynthesis, OKY-1581, and a potent inhibitor of cyclooxygenase, indomethacin, on gastric mucosal lesions induced by taurocholate or ethanol and mucosal generation of prostaglandins have been studied in rats. OKY-1581 prevented, dose

Induction of dental pulp fibroblast matrix metalloproteinase-1 and tissue inhibitor of metalloproteinase-1 gene expression by interleukin-1alpha and tumor necrosis factor-alpha through a prostaglandin-dependent pathway.

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Matrix metalloproteinase-1 (MMP-1) and tissue inhibitor of metalloproteinase-1 (TIMP-1) are involved in the degradation of extracellular matrix in many inflammatory diseases. Little is known regarding the expression of these mediators in dental pulp fibroblasts. The effects of proinflammatory

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

Inhibition of methanol extract from the fruits of Kochia scoparia on lipopolysaccharide-induced nitric oxide, prostaglandin [correction of prostagladin] E2, and tumor necrosis factor-alpha production from murine macrophage RAW 264.7 cells.

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In an attempt to search for bioactive natural products exerting antiinflammatory activity, we have evaluated the effects of the methanol extract of the fruits of Kochia scoparia (L.) CHARD. (Chenopodiaceae) on lipopolysaccharide (LPS)-induced nitric oxide (NO), prostaglandin E(2) (PGE(2)), and tumor

Prostaglandin-E2 regulation of tumor necrosis factor receptor release in human monocytic THP-1 cells.

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Recent in vitro studies indicate that tumor necrosis factor (TNF) production in human monocytic THP-1 cells is suppressed by action of arachidonic acid metabolite prostaglandin-E2 (PGE2). PGE2 stimulation of human monocytic cell line THP-1 demonstrates that PGE2 not only regulates TNF activity at

Stimulation of human chondrocyte prostaglandin E2 production by recombinant human interleukin-1 and tumour necrosis factor.

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In this study we have examined the effects of recombinant cytokine preparations on the production of prostaglandin E2 (PGE2) by human articular chondrocytes in both chondrocyte monolayer and cartilage organ cultures. The cytokines chosen for this study included only those reported to be present in

Alternative splicing of human prostaglandin G/H synthase mRNA and evidence of differential regulation of the resulting transcripts by transforming growth factor beta 1, interleukin 1 beta, and tumor necrosis factor alpha.

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Prostaglandin G/H synthase (PGG/HS) is the rate-limiting enzyme in the conversion of arachidonic acid to prostaglandins and thromboxanes. We screened a human lung fibroblast cDNA library with an ovine PGG/HS cDNA and isolated a 2.3-kilobase clone (HCO-T9). Sequence analysis of this clone showed that

Use of prostaglandin I2 analog in treatment of massive hepatic necrosis associated with endothelial cell injury and diffuse sinusoidal fibrin deposition.

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Endothelial cell damage causes massive hepatic necrosis as a result of fibrin deposition in the hepatic sinusoids. When a stable analog of prostaglandin I2, beraprost sodium, was administered to rats given either dimethylnitrosamine, carbon tetrachloride, or endotoxin following Corynebacterium

Prostaglandin synthesis by the porcine corpus luteum: effect of tumor necrosis factor-α.

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The porcine corpus luteum (CL) displays delayed sensitivity to PGF-2α (luteolytic sensitivity, [LS]) until days 12 to 13 of cycle. The control of LS is unknown, but it is temporally associated with macrophage (which secrete tumor necrosis factor-α; TNF-α) infiltration into the CL. Other studies

MDHM, a macrophage-stimulatory product of Mycoplasma fermentans, leads to in vitro interleukin-1 (IL-1), IL-6, tumor necrosis factor, and prostaglandin production and is pyrogenic in rabbits.

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Mycoplasma fermentans-derived high-molecular-weight material (MDHM) was originally discovered because of its capacity to generate, through the induction of monokine synthesis, cytolytic T lymphocytes in concanavalin A-stimulated thymocyte cultures. This study shows that MDHM-activated macrophages

Transforming growth factor beta 2 differentially modulates interleukin-1 beta- and tumour-necrosis-factor-alpha-stimulated phospholipase A2 and prostaglandin E2 synthesis in rat renal mesangial cells.

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Treatment of rat glomerular mesangial cells with transforming growth factor beta 2 (TGF beta 2) stimulates prostaglandin E2 (PGE2) synthesis. Actinomycin D, cycloheximide and diclofenac attenuate the TGF beta 2-induced PGE2 formation. As shown previously, two proinflammatory cytokines, interleukin 1

Differential deactivation of human dendritic cells by endotoxin desensitization: role of tumor necrosis factor-alpha and prostaglandin E2.

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The endotoxin (lipopolysaccharide)-induced cytokine response is followed by a state of unresponsiveness to lipopolysaccharide (LPS) referred to as LPS tolerance or endotoxin desensitization. LPS tolerance, which can be experimentally induced in vitro and in vivo, is also known to occur in septic

Estrogen potentiates the combined effects of transforming growth factor-beta and tumor necrosis factor-alpha on adult human osteoblast-like cell prostaglandin E2 biosynthesis.

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Reports that estrogen treatment modulates arachidonic acid metabolism by bone and bone cells are found in the literature. However, conflicting indications of the relationship that exists between estrogen and arachidonic acid metabolism emerge from the analysis of those reports. The present studies

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