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15 Αποτελέσματα
Protective effect of bepridil against veratrine-induced contracture in rat atria.
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Σύνδεση εγγραφή
In isolated stimulated rat atria, superfusion with veratrine caused a marked contracture (VIC) which was absent in calcium-free medium and which was inhibited by tetrodotoxin (IC50VIC of 1.38 microM). Lowering the extracellular calcium concentration from 2.5 to 0.5 or 0.1 mM reduced the
Cerebroprotective effect of BW619C89 after focal or global cerebral ischaemia in the rat.
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Σύνδεση εγγραφή
BW619C89 (4-amino-2-(4-methylpiperazin-l-yl)-5-(2,3,5-trichlorophenyl) pyrimidine) was evaluated for cerebroprotection after focal or global ischaemia. BW619C89, as the mesylate dihydrate salt, 20 mg kg-1, i.v. for 10 min immediately, or with a 1 h delay after permanent middle cerebral artery
3-(R)-[3-(2-methoxyphenylthio-2-(S)-methylpropyl]amino-3,4-dihydro-2H-1,5-benzoxathiepine bromhydrate (F 15845) prevents ischemia-induced heart remodeling by reduction of the intracellular Na+ overload.
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Σύνδεση εγγραφή
The present study investigates whether 3-(R)-[3-(2-methoxyphenylthio-2-(S)-methylpropyl]amino-3,4-dihydro-2H-1,5-benzoxathiepine bromhydrate (F 15845), a new, persistent sodium current blocker, can reduce the ischemic Na(+) accumulation and exert short- and long-term cardioprotection after
Increase in chloride-dependent L-glutamate transport activity in synaptic membrane after in vitro ischemic treatment.
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Σύνδεση εγγραφή
The effect of energy failure on Cl(-)-dependent L-glutamate (L-Glu) transport was examined with an in vitro preparation. Rat brain slices were incubated in low oxygen and glucose-deprived medium (in vitro ischemia), and a synaptic membrane fraction was prepared from the slices. Cl(-)-dependent
Effect of massive sympathetic nervous system activation on coronary blood flow and myocardial energy pool.
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Σύνδεση εγγραφή
Our previous work indicates that myocardial ischemia could be the mechanism responsible for the left ventricular (LV) dysfunction that frequently develops after massive sympathetic nervous system (SNS) activation. In this study, coronary blood flow (CBF) and myocardial ATP, creatine phosphate, and
Neurochemical and behavioral aspects of lamotrigine.
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Σύνδεση εγγραφή
Lamotrigine (LTG), a new anticonvulsant, chemically unrelated to current antiepileptic drugs (AEDs), resembles phenytoin (PHT) and carbamazepine (CBZ) in ability to block hindlimb extension in both the maximal electroshock test and leptazol-induced seizures. Results indicate that LTG may be of value
Late sodium current inhibition in human isolated cardiomyocytes by R 56865.
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Σύνδεση εγγραφή
R 56865, a cytoprotective agent, has been shown to prevent myocardial ischemia and reperfusion injury by blockade of the late sodium current (I(Nal)). The effect of R 56865 on I(Nal) in isolated human atrial myocytes was investigated by using the whole-cell patch-clamp technique. I(Nal) recorded at
Limiting ischemic injury by inhibition of excitatory amino acid release.
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Σύνδεση εγγραφή
Excitatory amino acids (EAAs) are important mediators of ischemic injury in stroke. N-Methyl-D-aspartate (NMDA) receptor antagonists have been shown to be very effective neuroprotective agents in animal models of stroke, but may have unacceptable toxicity for human use. An alternative approach is to
F 15845, a new blocker of the persistent sodium current prevents consequences of hypoxia in rat femoral artery.
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Σύνδεση εγγραφή
OBJECTIVE
The persistent sodium current is involved in myocardial ischaemia and is selectively inhibited by the newly described 3-(R)-[3-(2-methoxyphenylthio-2-(S)-methylpropyl]amino-3,4-dihydro-2H-1,5-benzoxathiepine bromhydrate (F 15845). Here, we describe the pharmacological profile of F 15845
Reduction of glutamate release and protection against ischemic brain damage by BW 1003C87.
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Σύνδεση εγγραφή
BW 1003C87, 5-(2,3,5-trichlorophenyl)-2,4-diaminopyrimidine ethane sulphonic acid, has been tested for its in vitro and in vivo effects on glutamate release in rat brain tissue, and for its cerebro-protective action in two rodent models of cerebral ischemia. In rat brain slices the release of
Neuroprotective effects of a use-dependent blocker of voltage-dependent sodium channels, BW619C89, in rat middle cerebral artery occlusion.
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Σύνδεση εγγραφή
BW619C89 [4-amino-2-(4-methyl-1-piperazinyl)-5-(2,3,5- trichlorophenyl)pyrimidine is a use-dependent blocker of voltage-dependent sodium channels that blocks veratrine-induced glutamate release in vitro. The aim of this study is to determine if BW619C89 inhibits glutamate release and is
Slowly inactivating component of sodium current in ventricular myocytes is decreased by diabetes and partially inhibited by known Na(+)-H(+)Exchange blockers.
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Σύνδεση εγγραφή
Recent evidence has suggested a major role for a slowly inactivating component of Na(+)current (I(NaL)) as a contributor to ischemic Na(+)loading. The purposes of this study were to investigate veratrine and lysophosphatidylcholine (LPC)-induced I(NaL)in single ventricular myocytes of normal and
Neuroprotective effects of amiodarone in a mouse model of ischemic stroke.
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Σύνδεση εγγραφή
BACKGROUND
Ion channels play a crucial role in the development of ischemic brain injury. Recent studies have reported that the blockade of various types of ion channels improves outcomes in experimental stroke models. Amiodarone, one of the most effective drugs for life-threatening arrhythmia, works
BW619C89, a glutamate release inhibitor, protects against focal cerebral ischemic damage.
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Σύνδεση εγγραφή
OBJECTIVE
The excitatory amino acid neurotransmitter glutamate is involved in excitotoxic brain injury and neurodegeneration after cerebral ischemia. Therefore, compounds that block the release of glutamate may be useful as cerebroprotective agents. The purpose of this study was to evaluate the
Cellular action of nicardipine.
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Σύνδεση εγγραφή
Nicardipine, a calcium antagonist of the 1:4 dihydropyridine type, has been used to treat angina and hypertension and is currently being examined as an agent for treating ischemia of cerebral and myocardial tissue. Nicardipine shows high affinity for the dihydropyridine binding site (pKi = 9.7) and
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