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Página 1 a partir de 54 resultados
Molecular analysis of the interaction of anthrax adenylyl cyclase toxin, edema factor, with 2'(3')-O-(N-(methyl)anthraniloyl)-substituted purine and pyrimidine nucleotides.
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Bacillus anthracis causes anthrax disease and exerts its deleterious effects by the release of three exotoxins: lethal factor, protective antigen, and edema factor (EF), a highly active calmodulin-dependent adenylyl cyclase (AC). However, conventional antibiotic treatment is ineffective against
Nucleotidyl cyclase activity of particulate guanylyl cyclase A: comparison with particulate guanylyl cyclases E and F, soluble guanylyl cyclase and bacterial adenylyl cyclases CyaA and edema factor.
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Guanylyl cyclases (GCs) regulate many physiological processes by catalyzing the synthesis of the second messenger cGMP. The GC family consists of seven particulate GCs (pGCs) and a nitric oxide-activated soluble GC (sGC). Rat sGC α1β1 possesses much broader substrate specificity than previously
Design, synthesis and ability of non-gold complexed substituted purine derivatives to inhibit LPS-induced inflammatory response.
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In order to study the anti-inflammatory activity of novel 6-substituted and 6,9-disubstituted purine derivatives, 20 compounds, L1-10 and W1-10, derived from purine and lacking a gold complex were designed, synthesized and their anti-inflammatory activity was screened. LPS-induced TNF-α, IL-1β,
Differential inhibition of adenylyl cyclase isoforms and soluble guanylyl cyclase by purine and pyrimidine nucleotides.
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Mammals express nine membranous adenylyl cyclase isoforms (ACs 1-9), a structurally related soluble guanylyl cyclase (sGC) and a soluble AC (sAC). Moreover, Bacillus anthracis and Bacillus pertussis produce the AC toxins, edema factor (EF), and adenylyl cyclase toxin (ACT), respectively.
Identification of malignant brain edema after hemispheric stroke by PET-imaging and microdialysis.
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Cerebral blood flow (CBF) and extent of irreversible tissue damage as well as the time course of extracellular concentration of amino acids, substrates of energy metabolism, and purine metabolites, intracranial pressure and tissue oxygen tension were assessed in 34 patients with large strokes
Inhibition of the adenylyl cyclase toxin, edema factor, from Bacillus anthracis by a series of 18 mono- and bis-(M)ANT-substituted nucleoside 5'-triphosphates.
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Bacillus anthracis causes anthrax disease and exerts its deleterious effects by the release of three exotoxins, i.e. lethal factor, protective antigen and edema factor (EF), a highly active calmodulin-dependent adenylyl cyclase (AC). Conventional antibiotic treatment is ineffective against either
Cytoxicity of [(5,6-dichloro-9a-n-propyl-2,3,9,9a-tetrahydro-3-oxo-1H fluoren-7-yl)oxy]acetic acid, an agent known to reduce brain edema.
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A known agent, [(5,6-dichloro-9a-n-propyl-2,3,9,9a-tetrahydro-3-oxo-1H fluoren-7-yl)oxy]acetic acid, which blocks brain edema, was also shown to be a potent cytotoxic agent in leukemia cells. The major site of action of the agents appears to be in the de novo purine synthetic pathway in L1210
Analgesic and anti-inflammatory activity of 7-substituted purine-2,6-diones.
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BACKGROUND
In an effort to develop new analgesic and anti-inflammatory agents, we determined a series of 7-substituted purine-2,6-diones.
METHODS
The obtained compounds (1-6) were evaluated pharmacologically in four in vivo models: the writhing syndrome, the formalin tests, the carrageenan-induced
Effects of prostaglandin E1 on platelet attenuation of oxidant-induced edema in isolated rabbit lungs.
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Numerous studies suggest that platelets may contribute to preservation of normal endothelial cell permeability in models of lung injury. We have previously shown that washed human platelets prevent xanthine oxidase-induced edema in the isolated perfused lung and that protective mechanisms depend on
Distinct interactions of 2'- and 3'-O-(N-methyl)anthraniloyl-isomers of ATP and GTP with the adenylyl cyclase toxin of Bacillus anthracis, edema factor.
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Anthrax disease is caused by the spore-forming bacterium, Bacillus anthracis. B. anthracis produces a calmodulin-activated adenylyl cyclase (AC) toxin, edema factor (EF). Through excessive cAMP accumulation EF disrupts host defence. In a recent study [Taha HM, Schmidt J, Göttle M, Suryanarayana S,
Final results of a multicenter phase II study of the purine nucleoside phosphorylase (PNP) inhibitor forodesine in patients with advanced cutaneous T-cell lymphomas (CTCL) (Mycosis fungoides and Sézary syndrome).
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BACKGROUND
Forodesine is a potent inhibitor of purine nucleoside phosphorylase (PNP) that leads to intracellular accumulation of deoxyguanosine triphosphate (dGTP) in T and B cells, resulting in apoptosis. Forodesine has demonstrated impressive antitumor activity in early phase clinical trials in
Final results of a multicenter phase II study of the purine nucleoside phosphorylase (PNP) inhibitor forodesine in patients with advanced cutaneous t-cell lymphomas (CTCL) (Mycosis fungoides and Sézary syndrome).
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Theacrine, a purine alkaloid with anti-inflammatory and analgesic activities.
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The anti-inflammatory and analgesic effects of theacrine (1, 3, 7, 9-tetramethyluric acid), a purine alkaloid which is abundantly present in Camellia kucha, were investigated. Xylene-induced ear edema, acetic acid-induced vascular permeability and lambda-carrageenan-induced paw edema were used to
Role of Purines in Müller Glia.
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Müller glia, the principal macroglia of the retina, express diverse subtypes of adenosine and metabotropic purinergic (P2Y) receptors. Müller cells of several species, including man, also express ionotropic P2X7 receptors. ATP is liberated from Müller cells after activation of metabotropic glutamate
The Pseudomonas aeruginosa Exoenzyme Y: A Promiscuous Nucleotidyl Cyclase Edema Factor and Virulence Determinant.
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Exoenzyme Y (ExoY) was identified as a component of the Pseudomonas aeruginosa type 3 secretion system secretome in 1998. It is a common contributor to the arsenal of type 3 secretion system effectors, as it is present in approximately 90% of Pseudomonas isolates. ExoY has adenylyl cyclase activity
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