nucleotidase/نخر

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Induction of ecto-5'-nucleotidase of rat cultured mesangial cells by interleukin-1 beta and tumour necrosis factor-alpha.

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Because ecto-5'-nucleotidase activity of rat glomerular mesangial cells has been shown to increase upon interaction with macrophages in vitro, it was examined whether interleukin-1 beta (IL-1 beta) and tumour necrosis factor-alpha (TNF-alpha), two macrophage-released cytokines, were responsible for

The antiinflammatory mechanism of methotrexate depends on extracellular conversion of adenine nucleotides to adenosine by ecto-5'-nucleotidase: findings in a study of ecto-5'-nucleotidase gene-deficient mice.

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OBJECTIVE Evidence from in vitro, in vivo, and clinical studies indicates that adenosine mediates, at least in part, the antiinflammatory effects of methotrexate (MTX), although the biochemical events involved have not been fully elucidated. This study was undertaken to investigate whether MTX

Why myotoxin-containing snake venoms possess powerful nucleotidases?

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The venom of the snake Bothrops asper causes muscle necrosis, pain and inflammation. This venom contains myotoxins which cause an increase in intracellular Ca(2+) concentration and release of K(+) and ATP from myotubes. ATP is a key danger molecule that triggers a variety of reactions, including

[Induction of ecto-5'-nucleotidase of rat mesangial cells in culture].

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It is very well known that macrophages via their secretory products act on many mesangial cell activities. IL-1b (interleukin-1b), tumor necrosis factor alfa (TNF-a) and prostoglandin E2 (PGE2) effect on rat mesangial cell ecto-enzymes: ecto-5'-nucleotidase and ecto-Mg++-ATP-ase were investigated.

Observations on gamma-glutamyl transferase, 5'-nucleotidase and leucine aminopeptidase activities in the plasma of the horse.

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In 18 horses there was no effect of age or sex on plasma activities of gamma-glutamyl transferase (gamma-GT), 5'-nucleotidase (5'-NT) and leucine aminopeptidase (LAP). All the enzymes were equally stable after storage for one month at -20 degrees C and there was no significant difference between

Distribution of 5'-nucleotidase in the tissues of sheep and the effect of kidney and liver lesions on the activity of the enzyme in plasma and urine.

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The distribution of 5'-nucleotidase (5'-NT) activity in the tissues of the sheep differs from that of gamma glutamyl transferase (GGT). Nevertheless, both enzymes are released into the plasma of sheep which have been infected with Fasciola hepatica or in which the bile duct has been ligated. In a

Tumor necrosis factor induces enzymatic changes in liver comparable to those in extrahepatic cancer.

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Human recombinant tumor necrosis factor was administered to rats in small doses to determine whether it causes changes in the activity of liver enzymes similar to those observed in cancer growing extrahepatically. Intraperitoneal injection of increasing doses of tumor necrosis factor (20-100

Expression of CD73/ecto-5'-nucleotidase on human gingival fibroblasts and contribution to the inhibition of interleukin-1alpha-induced granulocyte-macrophage colony stimulating factor production.

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OBJECTIVE CD73/5'-nucleotidase (5'-NT) is an ectoenzyme that participates in immune/inflammatory reactions. We examined the possible expression of CD73/5'-NT on human gingival fibroblasts (hGF), which are important to the immune/inflammatory system in periodontal tissue. RESULTS We demonstrated that

The intracellular pyrimidine 5'-nucleotidase NT5C3A is a negative epigenetic factor in interferon and cytokine signaling.

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The enzyme pyrimidine 5'-nucleotidase (NT5C3A), which mediates nucleotide catabolism, was previously thought to be restricted to blood cells. We showed that expression of the gene encoding NT5C3A was induced by type I interferons (IFNs) in multiple cell types and that NT5C3A suppressed cytokine

Effect of 5'-nucleotidase inhibitors on mouse immune system and experimental murine tumors.

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Nucleoticidin and melanocidins A and B exhibited potent inhibitory activity against 5'-nucleotidases from rat liver membrane and snake venom. Nucleoticidin retarded growth of Sarcoma 180 solid tumor, and melanocidins A and B prolonged the survival period of mice bearing B16 melanoma. These

Effects of tenofovir on cytokines and nucleotidases in HIV-1 target cells and the mucosal tissue environment in the female reproductive tract.

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Tenofovir (TFV) is a reverse transcriptase inhibitor used in microbicide preexposure prophylaxis trials to prevent HIV infection. Recognizing that changes in cytokine/chemokine secretion and nucleotidase biological activity can influence female reproductive tract (FRT) immune protection against HIV

Human monocyte derived dendritic cells express functional P2X and P2Y receptors as well as ecto-nucleotidases.

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We investigated the expression and function of P2 receptors and ecto-nucleotidases on human monocyte derived dendritic cells (DC). In addition we analyzed the effect of extracellular ATP on the maturation of DC. By RT-PCR, DC were found to express mRNA for several P2X (P2X1, P2X4, P2X5, P2X7) and

Ischemic preconditioning increases adenosine release and 5'-nucleotidase activity during myocardial ischemia and reperfusion in dogs. Implications for myocardial salvage.

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BACKGROUND Adenosine has been reported to mediate the necrosis-limiting effects of ischemic preconditioning; however, it is unclear how this mediation occurs. The present study was undertaken to test the hypothesis that ischemic preconditioning increases 5'-nucleotidase activity and adenosine

Ecto-5'-nucleotidase on immune cells protects from adverse cardiac remodeling.

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BACKGROUND Ecto-5'-nucleotidase (CD73) on immune cells is emerging as a critical pathway and therapeutic target in cardiovascular and autoimmune disorders. OBJECTIVE Here, we investigated the role of CD73 in postinfarction inflammation, cardiac repair, and remodeling in mice after reperfused

Ecto-5'-Nucleotidase (CD73) Deficiency in Mycobacterium tuberculosis-Infected Mice Enhances Neutrophil Recruitment.

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The immune system needs safeguards that prevent collateral tissue damage mediated by the immune system while enabling an effective response against a pathogen. The purinergic pathway is one such mechanism and finely modulates inflammation by sensing nucleotides in the environment. Extracellular ATP

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