Many different types of cells develop increased adenylyl cyclase activity (sensitization) on prior treatment with drugs such as opiates that acutely inhibit the enzyme. We found that human embryonic kidney (HEK) 293 m2 cells, which express the inhibitory m2 muscarinic cholinergic receptor, exhibit a large increase in forskolin-stimulated cAMP synthesis when… (More)
A priori estimates for mixed nite element methods for the wave equations, 6] T. Dupont, L 2-estimates for Galerkin methods for second order hyperbolic equations, SIAM J.
Complex network topologies and hyperbolic geometry seem specularly connected (Papadopoulos et al. 2012), and one of the most fascinating and challenging problems of recent complex network theory is to map a given network to its hyperbolic space. The Popularity Similarity Optimization (PSO) model represents-at the moment-the climax of this theory… (More)
Alterations in adenylyl cyclase activity in cultured cells after prolonged exposure to drugs such as morphine have been extensively studied as models for drug tolerance and withdrawal. NG108-15 cells develop increased intracellular cAMP concentrations after abrupt withdrawal from chronic treatment with the muscarinic cholinergic agonist carbachol. To… (More)
Buprenorphine is an opiate drug with a mixed agonist-antagonist profile and has therapeutic efficacy in attenuating drug craving and addiction. Because the adenylyl cyclase system has been implicated in the biochemical basis of opiate withdrawal phenomena, we have compared the acute and chronic effects of buprenorphine with the full opiate agonist etorphine… (More)
The increase in hormone-stimulated cyclic AMP accumulation observed in a variety of intact cells after chronic pretreatment with drugs that inhibit adenylate cyclase activity has been attributed to an increase in adenylate cyclase activity following withdrawal of the inhibitory drug. In NG 108-15 mouse neuroblastoma X rat glioma hybrid cells (NG cells)… (More)