صفحه 1 از جانب 83 نتایج
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
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
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
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.
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
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
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
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 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
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
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
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
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
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
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