Showing 1-30 of 46 results for "

c199

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Myung Ha Yoon et al.
Journal of Korean medical science, 18(2), 255-261 (2003-04-15)
Spinal gabapentin has been known to show the antinociceptive effect. Although several assumptions have been suggested, mechanisms of action of gabapentin have not been clearly established. The present study was undertaken to examine the action mechanisms of gabapentin at the...
A J Szkotak et al.
American journal of physiology. Cell physiology, 281(6), C1991-C2002 (2001-11-08)
The regulatory actions of adenosine on ion channel function are mediated by four distinct membrane receptors. The concentration of adenosine in the vicinity of these receptors is controlled, in part, by inwardly directed nucleoside transport. The purpose of this study...
Jillian G Baker et al.
British journal of pharmacology, 159(4), 772-786 (2010-01-29)
The introduction of fluorescence-based techniques, and in particular the development of fluorescent ligands, has allowed the study of G protein-coupled receptor pharmacology at the single cell and single molecule level. This study evaluated how the physicochemical nature of the linker...
Y Q Lin et al.
Journal of neurophysiology, 93(5), 2787-2796 (2005-01-14)
Schwann cells, from a variety of sources, are known to possess P2Y purinergic metabotropic receptors. However, it is not known if Schwann cells associated with autonomic nerve terminals possess such receptors and if so whether these receptors are activated by...
Johan-Till Pougnet et al.
Scientific reports, 6, 31836-31836 (2016-09-15)
Plasticity at excitatory synapses can be induced either by synaptic release of glutamate or the release of gliotransmitters such as ATP. Recently, we showed that postsynaptic P2X2 receptors activated by ATP released from astrocytes downregulate synaptic AMPAR, providing a novel...
Petr Potmesil et al.
European journal of pharmacology, 540(1-3), 191-199 (2006-05-31)
Newly developed acyclic nucleoside phosphonates, derivatives of adenine and 2,6-diaminopurine bearing the 2-hydroxy-3-(phosphonomethoxy)propyl (HPMP) moiety at the N9-side chain (i.e., HPMPA and HPMPDAP, respectively) were screened for in vitro immunobiological activity, using mouse resident peritoneal macrophages and splenocytes. Both HPMPA...
Lazaros C Foukas et al.
The Journal of biological chemistry, 277(40), 37124-37130 (2002-07-30)
We investigated the effects of methylxanthines on enzymatic activity of phosphoinositide 3-kinases (PI3Ks). We found that caffeine inhibits the in vitro lipid kinase of class I PI3Ks (IC(50) = 75 microm for p110 delta, 400 microm for p110 alpha and...
Katelyn E Zulauf et al.
Proceedings of the National Academy of Sciences of the United States of America, 117(47), 29839-29850 (2020-11-11)
Carbapenem-resistant Enterobacteriaceae (CRE) are multidrug-resistant pathogens for which new treatments are desperately needed. Carbapenemases and other types of antibiotic resistance genes are carried almost exclusively on large, low-copy-number plasmids (pCRE). Accordingly, small molecules that efficiently evict pCRE plasmids should restore...
Kornkamon Lertsuwan et al.
International journal of molecular sciences, 21(3) (2020-02-06)
Cholangiocarcinoma (CCA) is a lethal disease with increasing incidence worldwide. Previous study showed that CCA was sensitive to adenosine. Thereby, molecular mechanisms of CCA inhibition by adenosine were examined in this study. Our results showed that adenosine inhibited CCA cells...
Chi Ting Leung et al.
Purinergic signalling, 10(3), 465-475 (2014-03-07)
Mast cell degranulation triggers hypersensitivity reactions at the body-environment interface. Adenosine modulates degranulation, but enhancement and inhibition have both been reported. Which of four adenosine receptors (ARs) mediate modulation, and how, remains uncertain. Also uncertain is whether adenosine reaches mast...
Tiago Donatelli Serafim et al.
PLoS neglected tropical diseases, 6(9), e1833-e1833 (2012-10-11)
Leishmania parasites, the causative agent of leishmaniasis, are transmitted through the bite of an infected sand fly. Leishmania parasites present two basic forms known as promastigote and amastigote which, respectively, parasitizes the vector and the mammalian hosts. Infection of the...
E Ongini et al.
Naunyn-Schmiedeberg's archives of pharmacology, 359(1), 7-10 (1999-02-05)
Three structurally related non-xanthine compounds, CGS 15943, ZM 241385 and SCH 58261, are potent A2A adenosine receptor antagonists and have been used as tools in many pharmacological studies. We have now characterized their affinity and selectivity profile on human adenosine...
Trinity J Bivalacqua et al.
American journal of physiology. Regulatory, integrative and comparative physiology, 282(6), R1696-R1709 (2002-05-16)
Hemodynamic responses to adenosine, the A(1) receptor agonists N(6)-cyclopentyladenosine (CPA) and adenosine amine congener (ADAC), and the A(2) receptor agonist 5'-(N-cyclopropyl)-carboxamido-adenosine (CPCA) were investigated in the hindquarter vascular bed of the cat under constant-flow conditions. Injections of adenosine, CPA, ADAC...
M Williams et al.
The Journal of pharmacology and experimental therapeutics, 241(2), 415-420 (1987-05-01)
CGS 15943A, a triazoloquinazoline, is a potent and selective adenosine receptor antagonist as assessed by its effects on radioligand binding and adenosine-stimulated adenylate cyclase activity in guinea pig synaptoneurosomes. At the adenosine A-1 receptor labeled with [3H]cyclohexyladenosine, CGS 15943A had...
Nils Ludwig et al.
Purinergic signalling, 16(2), 231-240 (2020-05-23)
Exosomes, small-sized extracellular vesicles, carry components of the purinergic pathway. The production by cells of exosomes carrying this pathway remains poorly understood. Here, we asked whether type 1, 2A, or 2B adenosine receptors (A1Rs, A2ARs, and A2BRs, respectively) expressed by...
Bharath Sunchu et al.
Biochemistry, 51(51), 10137-10146 (2012-12-01)
PriA helicase catalyzes the initial steps of replisome reloading onto repaired DNA replication forks in bacterial DNA replication restart pathways. We have used a high-throughput screen to identify a small molecule inhibitor of PriA-catalyzed duplex DNA unwinding. The compound, CGS...
Zhan-Guo Gao et al.
Cells, 9(5) (2020-05-16)
Allosteric antagonism by bitopic ligands, as reported for many receptors, is a distinct modulatory mechanism. Although several bitopic A2A adenosine receptor (A2AAR) ligand classes were reported as pharmacological tools, their receptor binding and functional antagonism patterns, i.e., allosteric or competitive...
Stéphane Le Crom et al.
Journal of neurochemistry, 82(6), 1549-1552 (2002-10-02)
Adenosine is known to modulate dopamine responses in several brain areas. Here, we show that tonic activation of adenosine receptors is able to impede desensitization of D1 dopamine receptors. As measured by cAMP accumulation in transfected COS-7 cells, long-term exposure...
A C Ngai et al.
American journal of physiology. Heart and circulatory physiology, 280(5), H2329-H2335 (2001-04-12)
The purpose of this study was to investigate the receptor subtypes that mediate the dilation of rat intracerebral arterioles elicited by adenosine. Penetrating arterioles were isolated from the rat brain, cannulated with the use of a micropipette system, and luminally...
J m Li et al.
The Journal of surgical research, 80(2), 357-364 (1999-01-08)
Adenosine is a potent vasodilator of vascular smooth muscle. Endothelium-derived nitric oxide (NO) elicits vasodilation. We have previously reported that adenosine stimulates the production of NO from porcine carotid arterial endothelial cells (PCAEC) via a receptor-mediated mechanism. This study was...
Soo-Kyung Kim et al.
Journal of medicinal chemistry, 46(23), 4847-4859 (2003-10-31)
A three-dimensional model of the human A(2A) adenosine receptor (AR) and its docked ligands was built by homology to rhodopsin and validated with site-directed mutagenesis and the synthesis of chemically complementary agonists. Different binding modes of A(2A)AR antagonists and agonists...
Elise M Weerts et al.
Psychopharmacology, 168(1-2), 155-163 (2003-04-02)
Caffeine and the adenosine A(1) and A(2A) receptor antagonist CGS15943 produce many behavioral effects that are similar to those produced by classic stimulant drugs (e.g. cocaine and amphetamines). The current study evaluated whether CGS15943 would maintain self-administration and reinstate extinguished...
Eva Kmonícková et al.
European journal of pharmacology, 530(1-2), 179-187 (2005-12-24)
Acyclic nucleoside phosphonates are widely recognised antivirals. The oral prodrugs of prototype compounds, e.g., 9-[2-(phosphonomethoxy)ethyl]adenine (PMEA; adefovir), and 9-(R)-[2-(phosphonomethoxy)propyl]adenine [(R)-PMPA; tenofovir] were approved by FDA for treatment of hepatitis B (Hepsera), and acquired immunodeficiency syndrome (AIDS) (Viread), respectively. A number...
Charlotte E Edling et al.
Cancer biology & therapy, 15(5), 524-532 (2014-02-14)
Caffeine is a naturally occurring methylxanthine that acts as a non-selective adenosine receptor antagonist. Epidemiological studies demonstrated habitual coffee drinking to be significantly associated with liver cancer survival. We aimed to investigate the effects of caffeine and its analog CGS...
Anna Vlachodimou et al.
Scientific reports, 9(1), 13802-13802 (2019-09-26)
Transporters are important therapeutic but yet understudied targets due to lack of available assays. Here we describe a novel label-free, whole-cell method for the functional assessment of Solute Carrier (SLC) inhibitors. As many SLC substrates are also ligands for G...
Matthew L Bilodeau et al.
Molecular and cellular neurosciences, 29(3), 394-404 (2005-05-12)
In neural crest (NC) cultures cAMP signaling is an instructive signal in catecholaminergic, sympathoadrenal cell development. However, the extracellular signals activating the cAMP pathway during NC cell development have not been identified. We demonstrate that in avian NC cultures, evidenced...
Cristina Roseti et al.
Proceedings of the National Academy of Sciences of the United States of America, 105(39), 15118-15123 (2008-09-24)
We examined how the endogenous anticonvulsant adenosine might influence gamma-aminobutyric acid type A (GABA(A)) receptor stability and which adenosine receptors (ARs) were involved. Upon repetitive activation (GABA 500 microM), GABA(A) receptors, microtransplanted into Xenopus oocytes from neurosurgically resected epileptic human...
Laura Fontenas et al.
Cell reports, 27(1), 115-128 (2019-04-04)
During development, oligodendrocyte progenitor cells (OPCs) migrate extensively throughout the spinal cord. However, their migration is restricted at transition zones (TZs). At these specialized locations, unique glial cells in both zebrafish and mice play a role in preventing peripheral OPC...
Benjamin Grau et al.
Purinergic signalling, 4(4), 357-364 (2008-09-09)
The formation of appropriate connections between neurons and their specific targets is an essential step during development and repair of the nervous system. Growth cones are located at the leading edges of the growing neurites and respond to environmental cues...
Thanaporn Kaewphaleuk et al.
Life sciences, 228, 21-29 (2019-04-27)
Ethanol is known to induce NO release and coronary vasorelaxation. Evidence suggests that K+ channels, especially a Ca2+-activated K+ channel (KCa), may regulate endothelial NO production. We aimed to investigate the ethanol effect on K+ currents in human coronary artery...