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Página 1 a partir de 3092 resultados
A3 adenosine receptor antagonist, truncated Thio-Cl-IB-MECA, induces apoptosis in T24 human bladder cancer cells.
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BACKGROUND
Human A(3) adenosine receptor (A(3)AR) plays an essential role in several physiopathological processes. Thus far, A(3)AR-selective ligands have been evaluated as anti-inflammation and anticancer therapeutic agents. Among these ligands, truncated thio-Cl-IB-MECA is a newly reported
Cell cycle arrest and the induction of apoptosis in pancreatic cancer cells exposed to adenosine triphosphate in vitro.
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Adenosine triphosphate (ATP) has been shown to be an inhibitory or a stimulatory agent for cell growth in various types of cells. Here, we studied the effects of extracellular ATP on two pancreatic cancer cell lines, PK-1 and YAPC established by us. In both cell lines, ATP inhibited cell growth in a
Adenosine 5'-triphosphate-sensitive potassium channel activator induces the up-regulation of caveolin-1 expression in a rat brain tumor model.
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This study was performed to determine whether minoxidil sulfate (MS), a selective Adenosine 5'-triphosphate-sensitive potassium channel (K (ATP) channel) activator, has an effect on the expression of caveolin-1 in the rat's brain tumor tissue. Using a rat brain glioma (C6) model, we found that the
[Influence of intraoperative sodium adenosine triphosphate infusion on leukocyte dynamics following colonic resection in cancer patients].
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The paper evaluates effects of different methods of systemic intraoperative anesthesia on the dynamics of leukocytes following colonic resection in tumor patients. Lymphocytes levels rose on day 2 after operation in patients receiving non-selective purine receptor agonists (sodium adenosine
Expression of thrombomodulin by smooth muscle cells in culture: different effects of tumor necrosis factor and cyclic adenosine monophosphate on thrombomodulin expression by endothelial cells and smooth muscle cells in culture.
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Thrombomodulin (TM), a critical component of the protein C anticoagulant pathway, has previously been localized to endothelial cells (EC), but not smooth muscle cells (SMC) of the blood vessel wall. We demonstrate that cultured rat, bovine, as well as human SMC, but not blood vessel wall smooth
KF24345, an adenosine uptake inhibitor, suppresses lipopolysaccharide-induced tumor necrosis factor-alpha production and leukopenia via endogenous adenosine in mice.
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3-[1-(6,7-Diethoxy-2-morpholinoquinazolin-4-yl)piperidin-4-yl]-1,6-dimethyl-2,4(1H,3H)-quinazolinedione hydrochloride (KF24345) is a novel potent adenosine uptake inhibitor. KF24345 inhibited [(3)H]adenosine uptake into erythrocytes from human, mouse, rabbit, and hamster with IC(50) values of 59.5,
Adenosine inhibits tumor necrosis factor-alpha release from mouse peritoneal macrophages via A2A and A2B but not the A3 adenosine receptor.
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Adenosine is elaborated in injured tissues where it suppresses inflammatory responses of essentially all immune cells, including production of proinflammatory cytokines such as tumor necrosis factor-alpha (TNF-alpha). Most of the anti-inflammatory actions of adenosine have been attributed to
In vitro evaluation of adenosine 5'-monophosphate as an imaging agent of tumor metabolism.
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Adenosine appears to play an important role in tumor growth and metastasis. Synthesized (11)C-adenosine 5'-monophosphate (AMP) has recently been reported as a potential tumor-imaging radiotracer.
METHODS
A variety of human tumor cell lines (SKOV-3, SCC-15, U251, U87, Raji, and Daudi) were incubated
Adenosine A2A receptor agonists inhibit lipopolysaccharide-induced production of tumor necrosis factor-alpha by equine monocytes.
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Adenosine is an endogenous nucleoside that regulates many physiological processes by activating one or more adenosine receptor subtypes, namely A1, A2A, A2B and A3. The results of previous studies indicate that adenosine analogues inhibit lipopolysaccharide (LPS)-induced production of reactive
Adenosine inhibits platelet-activating factor, but not tumour necrosis factor-alpha-induced priming of human neutrophils.
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Regulation of the respiratory burst and its priming by recombinant human tumour necrosis factor-alpha (rhTNF-alpha) and platelet-activating factor (PAF) were investigated in human polymorphonuclear leucocytes (PMN). Adenosine (0.1-10 microM) pretreatment of PMN concentration-dependently inhibited
Suppression of lipopolysaccharide-stimulated release of tumor necrosis factor by adenosine: evidence for A2 receptors on rat Kupffer cells.
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In liver grafts that will fail as a result of storage injury, reperfusion activates Kupffer cells. Overproduction of tumor necrosis factor by activated Kupffer cells may cause primary graft nonfunction, multiple organ failure and, eventually, death of graft recipients. Carolina rinse solution,
Activation of adenosine receptors inhibits tumor necrosis factor-alpha release by decreasing TNF-alpha mRNA stability and p38 activity.
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Adenosine receptor agonists have anti-inflammatory properties and modulate immune responses partly by inhibiting pro-inflammatory cytokine production by monocytes. We investigated signal transduction mechanisms by which adenosine receptor activation inhibits tumor necrosis factor-alpha (TNF-alpha)
Adenosine induces cell cycle arrest and apoptosis via cyclinD1/Cdk4 and Bcl-2/Bax pathways in human ovarian cancer cell line OVCAR-3.
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Adenosine is a regulatory molecule with widespread physiological effects in almost every cells and acts as a potent regulator of cell growth. Adenosine has been shown to inhibit cell growth and induce apoptosis in the several cancer cells via caspase activation and Bcl-2/Bax pathway. The present
Synergistic effect of 3'-deoxyadenosine N1-oxide and adenosine deaminase inhibitors on growth of Ehrlich ascites tumor cells in vivo.
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The simultaneous administration of 3'-deoxyadenosine N1-oxide (3'-dANO) and the adenosine deaminase inhibitors erythro-9-(2-hydroxy-3-nonyl) adenine (EHNA) or 2'-deoxycoformycin (2'-dCF) to mice bearing Ehrlich ascites tumor cells resistant to 3'-dANO resulted in 80%-90% inhibition of tumor growth
Periodate-oxidized adenosine induction of murine thymidine kinase: role of DNA methylation in the generation of tumor cell heterogeneity.
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We previously reported that thymidine kinase (TK) activity in a spontaneously TK-deficient (TK-) murine tumor cell line (called L61-M) could be partially restored following brief treatment of the cells in vitro with the potent DNA-hypomethylating agent 5-azacytidine. We now show here that similar
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