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Suppression of neuronal network excitability and seizure-like events by 2-methyl-4-oxo-3H-quinazoline-3-acetyl piperidine in juvenile rat hippocampus: involvement of a metabotropic glutamate receptor.

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We present data on the antiepileptic potency of 2-methyl-4-oxo-3H-quinazoline-3-acetyl piperidine (Q5) in juvenile (P9-13) rat hippocampal slices and in particular Q5's action mechanism and target. Q5 (200-500 microM), but not alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA)/Kainate

Designer Drug (DD) abuse in Poland; a review of the psychoactive and toxic properties of substances found from seizures of illegal drug products and the legal consequences thereof. Part II--piperazines/piperidines, phenylethylamines, tryptamines and miscellaneous 'others'.

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As the second and concluding part, this paper continues the summary review of the scientific evidence obtained from the literature and focuses on the remaining 4/6 groupings of DDs identified in illegal products found in the huge drug seizures made recently in Poland. They consist of

N-Methyl-D-aspartic acid- and metaphit-induced audiogenic seizures in rat model of seizures.

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The effects of NMDA (N-methyl-D-aspartic acid) on metaphit (1-[1(3-isothiocyanatophenyl)-cyclohexyl]piperidine)-induced audiogenic seizures in adult male Wistar albino rats were studied with the aim of developing a suitable animal model of seizures. The animals were divided into four experimental

Assessment of the muscarinic receptor subtypes involved in pilocarpine-induced seizures in mice.

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We have used the pilocarpine-induced seizure model in mice and i.c.v. injection of subtype-specific receptor antagonists to investigate the muscarinic receptor subtype specificity of cholinergically-activated seizures. The rank order potencies of antagonists for inhibition of pilocarpine-induced

Synthesis of N-substituted 4-(4-hydroxyphenyl)piperidines, 4-(4-hydroxybenzyl)piperidines, and (+/-)-3-(4-hydroxyphenyl)pyrrolidines: selective antagonists at the 1A/2B NMDA receptor subtype.

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Antagonists at the 1A/2B subtype of the NMDA receptor (NR1A/2B) are typically small molecules that consist of a 4-benzyl- or a 4-phenylpiperidine with an omega-phenylalkyl substituent on the heterocyclic nitrogen. Many of these antagonists, for example ifenprodil (1), incorporate a 4-hydroxy

Competitive NMDA-receptor antagonists, LY 235959 and LY 233053, enhance the protective efficacy of various antiepileptic drugs against maximal electroshock-induced seizures in mice.

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OBJECTIVE The objective of this study was to evaluate an interaction of two competitive N-methyl-D-aspartate (NMDA)-receptor antagonists, LY 235959 l(-)-3R,4aS,6R,8aR-6-(phosphonomethyl)-decahydroiso-qu inoline-3-carboxylic acid; < or = 0.5 mg/kg] or LY 233053 cis-(+/-)-4-[(2H-tetrazol-5-yl)

Anticonvulsant activity of two orally active competitive N-methyl-D-aspartate antagonists, CGP 37849 and CGP 39551, against sound-induced seizures in DBA/2 mice and photically induced myoclonus in Papio papio.

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Two novel N-methyl-D-aspartate (NMDA) antagonists, DL-(E)-2-amino-4-methyl-5-phosphono-3-pentenoic acid CPG 37849 and the corresponding 1-ethyl ester CGP 39551, were tested as anticonvulsants in DBA/2 mice and photosensitive Senegalese baboons, Papio papio. In DBA/2 mice, CGP 37849 is more potent

The central medial nucleus: thalamic site of seizure regulation.

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This study demonstrates that the central medial intralaminar nucleus (CeM) controls generalized seizure threshold and expression, and that these functions are under gamma-aminobutyric acid (GABA)ergic control, with significant differences between receptor subtypes. Injections of the GABAA-agonist

Discovery of 1,4-substituted piperidines as potent and selective inhibitors of T-type calcium channels.

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The discovery of a novel series of potent and selective T-type calcium channel antagonists is reported. Initial optimization of high-throughput screening leads afforded a 1,4-substituted piperidine amide 6 with good potency and limited selectivity over hERG and L-type channels and other off-target

Anticonvulsive activity of several excitatory amino acid antagonists against barbital withdrawal-induced spontaneous convulsions.

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Several excitatory amino acid antagonists were tested for an ability to prevent spontaneous convulsions seen during the barbital abstinence syndrome in rats. Barbital-dependent animals were continuously infused intracerebroventricularly (i.c.v.) for the first 48 h following barbital withdrawal with

[Piperidine in the brain: its neurobiological significance].

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Piperidine (Pip) is a normal constituent in mammalian brain, affects synaptic mechanism in the CNS, and influences neural mechanisms governing regulation of emotional behavior and extrapyramidal function. In addition, there are enzyme systems within the brain that synthesize and metabolize Pip, and

The phencyclidine (PCP) analog N-[1-(2-benzo(B)thiophenyl) cyclohexyl]piperidine shares cocaine-like but not other characteristic behavioral effects with PCP, ketamine and MK-801.

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Phencyclidine (PCP) inhibits dopamine (DA) uptake and acts as a noncompetitive N-methyl-D-aspartate antagonist by binding to PCP receptors. The PCP analog N-[1-(2-benzo(b)thiophenyl) cyclohexyl]piperidine (BTCP, GK13) is a potent DA uptake inhibitor, but has low affinity for PCP receptors. The

Mixed cocaine agonist/antagonist properties of (+)-methyl 4beta-(4-chlorophenyl)-1-methylpiperidine-3alpha-carboxylate, a piperidine-based analog of cocaine.

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The present study investigated the pharmacological properties of a piperidine-based novel cocaine analog, namely, (+)-methyl 4beta-(4-chlorophenyl)-1-methylpiperidine-3alpha-carboxylic acid [(+)-CPCA]. Like cocaine, (+)-CPCA inhibited rat synaptosomal dopamine and norepinephrine uptake with high

Suppression of spike-wave discharge activity and c-fos expression by 2-methyl-4-oxo-3H-quinazoline-3-acetyl piperidine (Q5) in vivo.

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Antiepileptic and network inhibitory actions of Q5 (2-methyl-4-oxo-3H-quinazoline-3-acetyl piperidine) have recently been described in hippocampal slices. Here we present evidence on the in vivo antiabsence effect of Q5. All doses of Q5 tested (0.3 mg/kg, 0.9 mg/kg, 2.8 mg/kg) decreased the number,

[Behavioral and electroencephalographic effects of delta sleep inducing peptide and its analogue on metaphit-induced audiogenic seizures in rats].

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BACKGROUND Delta sleep inducing peptide (DSIP) is well known natural somnogenic peptide that has many other physiological functions. DSIP analogues representing hepta- and octapeptides (also known as long) as well as tetrapeptide (termed short, used in our experiments) were synthesized with a view

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