Simon Lemaire

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Dynorphin A (dynA) and related opioid peptides produce moderate analgesic effects with restricted types of pain stimuli that are often accompanied by a large variety of naloxone-insensitive biochemical and behavioural effects. In binding assays in vitro, dynA possesses a high affinity for mu-, delta- and kappa- opioid receptors with some selectivity for(More)
1. Rat brain synaptosomes and cultured bovine adrenal chromaffin cells were used to monitor the inhibitory effects of phencyclidine (PCP) and sigma (sigma)-receptor ligands on the uptake of [3H]-noradrenaline ([3H]-NA). 2. A Na(+)-dependent high affinity uptake was observed in synaptosomes (30 degrees C) and chromaffin cells (37 degrees C) with Km of 0.22(More)
Dynorphin A-(1-13) and related peptide fragments were tested for their ability to modulate the binding of the competitive NMDA receptor antagonist, [3H]2-amino-4-propyl-5-phosphono-3-pentanoic acid ([3H]CGP-39653), to rat brain membranes. Dynorphin A-(1-13) produced a dose-dependent (1 nM to 10 microM) potentiation of [3H]CGP-39653 binding. The potentiation(More)
We develop an arbitrary-order primal method for diffusion problems on general polyhedral meshes. The degrees of freedom are scalar-valued polynomials of the same order at mesh elements and faces. The cornerstone of the method is a local (element-wise) discrete gradient reconstruction operator. The design of the method additionally hinges on a least-squares(More)
The effect of intrathecal injections of dynorphin1-8 (DYN1-8), dynorphin1-13 (DYN1-13), and a putative kappa agonist, U50,488 was tested in the rat tail-flick test. DYN1-8 and DYN1-13 (5, 10, 20 micrograms) produced a dose-related biphasic antinociceptive response consisting of an initial and a delayed response. Injection of U50,488 (20, 40 60 micrograms)(More)
The effect of dynorphin A (Dyn A)-related peptides and nociceptin on the binding of the D2 receptor antagonist, [(3)H]raclopride, was examined in membrane preparations of rat heart. Non-linear regression saturation binding analysis of [(3)H]raclopride binding revealed the presence of a single high-affinity binding site with a K(d)of 4.1 n M and a B(max)of(More)
The levels of immunoreactive Leu-enkephalin (ir-Leu-Enk) were measured in acid extract of hearts and lungs of adult normotensive Wistar Kyoto (WKY) and spontaneously hypertensive (SHR) rats. Heart contents in ir-Leu-Enk were significantly higher in SHR rats (2.67 pmol/g) than in WKY rats (1.5 pmol/g). However, no significant change was observed in lung(More)
In this work we introduce a discrete functional space on general polygonal or polyhedral meshes which mimics two important properties of the standard Crouzeix–Raviart space, namely the continuity of mean values at interfaces and the existence of an interpolator which preserves the mean value of the gradient inside each element. The construction borrows(More)
Dynorphin (Dyn) A and related opioid and nonopioid peptides were tested for their ability to produce motor effects in mice. Central (intracerebroventricular) administration of Dyn A in mice produced marked motor effects characterized by wild running, jumping, circling and/or barrel rolling with an ED50 value of 14.32 (95% confidence limits, 10.09-20.32)(More)
A discrete model of Brownian sticky flows on the unit circle is described: it is constructed with products of Beta matrices on the discrete torus. Sticky flows are defined by their " moments " which are consistent systems of transition kernels on the unit circle. Similarly, the moments of the discrete model form a consistent system of transition matrices on(More)