isoquinoline/seizures

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Assessment of the in vivo and in vitro opioid activity of bridged hexahydroaporphine and isoquinoline molecules.

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Four novel racemic bridged hexahydroaporphine (1 and 2) and isoquinoline (3 and 4) analogues have been synthesized in an attempt to generate bicyclic derivatives of the morphinan ring system. The opioid activity of these analogues has been assessed through membrane-binding studies, in vitro studies

Effects of differential modulation of mu-, delta- and kappa-opioid systems on bicuculline-induced convulsions in the mouse.

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The present study investigated the effects of micro-, delta- and kappa-opioid receptor agonists on seizures produced by blockade of gamma-aminobutyric acid (GABA)-mediated synaptic transmission in the mouse. The selective GABA(A) receptor antagonist bicuculline (1.25-3 mg/kg) given subcutaneously

Opposite effects of an agonist, RO5-4864, and an antagonist, PK 11195, of the peripheral type benzodiazepine binding sites on audiogenic seizures in DBA/2J mice.

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Two compounds with high affinity for the "peripheral type" benzodiazepine binding sites, PK 11195 (an isoquinoline derivative) and RO5-4864 (a benzodiazepine derivative) can modify the sensitivity of DBA/2J mice to audiogenic seizures. RO5-4864 (1-15 mg/kg) facilitates in a dose-dependent manner the

Benzodiazepine receptor binding and anticonflict activity in a series of 3,6-disubstituted pyridazino[4,3-c]isoquinolines devoid of anticonvulsant properties.

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A series of 3,6-disubstituted pyridazino[4,3-c]isoquinolines were synthesized and tested for their ability to inhibit the binding of [3H]diazepam to rat brain receptors in vitro. Compounds bearing a phenyl, 4-methoxyphenyl, or methyl group at position 3 and a dialkylamino group at position 6 showed

Anticonvulsant activity of berberine, an isoquinoline alkaloid in mice.

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Berberine, an isoquinoline alkaloid is reported to modulate several neurotransmitter systems like N-methyl-D-aspartate, nitric oxide and serotonin, which modulate convulsions. In addition, it is suggested that Berberis vulgaris may be useful in treatment of convulsion and epilepsy. Therefore, the

PK 11195 attenuates kainic acid-induced seizures and alterations in peripheral-type benzodiazepine receptor (PBR) protein components in the rat brain.

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Peripheral-type benzodiazepine receptors (PBR) are located in glial cells in the brain and in peripheral tissues. Mitochondria form the primary location for PBR. Functional PBR appear to require at least three components: an isoquinoline binding protein, a voltage-dependent anion channel, and an

Zebrafish-Based Discovery of Antiseizure Compounds from the North Sea: Isoquinoline Alkaloids TMC-120A and TMC-120B.

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There is a high need for the development of new and improved antiseizure drugs (ASDs) to treat epilepsy. Despite the potential of marine natural products (MNPs), the EU marine biodiscovery consortium PharmaSea has made the only effort to date to perform ASD discovery based on large-scale screening

Synthesis and anticonvulsant evaluation of N-substituted isoquinoline AMPA receptor antagonists.

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In our previous studies a ligand-based approach led to the identification of noncompetitive AMPA receptor antagonists containing isoquinoline scaffold. In an attempt to perform a systematic SAR study, we synthesized new N-substituted-isoquinolines bearing the most salient features described by our

Evidence for a selective role of the delta-opioid agonist [8R-(4bS,8aalpha,8abeta, 12bbeta)]7,10-Dimethyl-1-methoxy-11-(2-methylpropyl)oxycarbonyl 5,6,7,8,12,12b-hexahydro-(9H)-4,8-methanobenzofuro[3,2-e]pyrrolo[2,3-g]isoquinoline* hydrochloride (SB-235863) in blocking hyperalgesia associated with inflammatory and neuropathic pain responses.

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The specific involvement of the delta-opioid receptor in the control of nociception was explored by investigating the pharmacological activity in vivo of a selective, orally active, and centrally penetrant delta-opioid agonist.

The Influence of Palmatine Isolated from Berberis sibirica Radix on Pentylenetetrazole-Induced Seizures in Zebrafish

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Palmatine (PALM) and berberine (BERB) are widely identified isoquinoline alkaloids among the representatives of the Berberidaceae botanical family. The antiseizure activity of BERB was shown previously in experimental epilepsy models. We assessed the effect of PALM in a pentylenetetrazole

Pharmacological and biochemical studies with three metabolites of nomifensine.

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Three major metabolites (M1, M2, M3) of nomifensine (8-amino-1,2,3,4-tetrahydro-2-methyl-4-phenyl-isoquinoline) are formed by hydroxylation and methoxylation of the phenyl ring. They were compared with nomifensine 1. in various psychopharmacological tests in vivo, carried out in mice after oral or

2-Aryl-3-indoleacetamides (FGIN-1): a new class of potent and specific ligands for the mitochondrial DBI receptor (MDR).

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The 2 aryl-3-indoleacetamides (FGIN-1) are a new class of compounds that potently (nM) and selectively bind to glial mitochondrial diazepam binding inhibitor (DBI) receptors (MDR), previously called peripheral benzodiazepine receptors, and increase mitochondrial steroidogenesis. The high-affinity

Increased serotonergic neurotransmission is not responsible for the anticompulsive effect of berberine in a murine model of obsessive-compulsive disorder.

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Berberine, an isoquinoline alkaloid, is being extensively explored in several clinical trials for the treatment of metabolic disorder and cancer. It is also reported to be a potent inhibitor of prolyl oligopeptidase, which makes it a potential candidate for the treatment of neuropsychiatric

Enhanced susceptibility of pentylenetetrazole kindled mice to quinolone effects.

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The present study was designed to examine the ability of different quinolones to affect the seizure severity and the latency of development of chemical kindling produced by repeated treatment using a subconvulsant dose of pentylenetetrazole (PTZ). A group of mice (kindled control) were treated

Chronic benzodiazepine administration. XI. Concurrent administration of PK11195 attenuates lorazepam discontinuation effects.

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Benzodiazepine discontinuation is associated with alterations in motor activity and gamma-aminobutyric acid-A receptor upregulation in a mouse model. Prior studies indicate that concurrent administration of the compound N-methyl-N-(methyl-1-propyl)chloro-2-phenyl-1-isoquinoline-3- carboxamide

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