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The effects of ketamine, which has NMDA receptor antagonist properties, on synaptic transmission and long-term potentiation in layer II/III of adult rat visual cortex were examined in vitro. Field potentials were recorded in layer II/III following layer IV stimulation. Primed-burst stimulation...
The synthetic compound 4-chlorokynurenine has been shown to be enzymatically transaminated to the selective glycine B receptor antagonist 7-chlorokynurenate. Since 4-chlorokynurenine, in contrast to 7-chlorokynurenate, readily penetrates the blood–brain barrier, the present study evaluated its...
We investigated the effects of orally supplemented l -arginine, the substrate of nitric oxide (NO) and N ω -nitro- l -arginine methyl ester ( l -NAME), a nitric oxide-synthase inhibitor in gentamicin-induced renal failure. Rats were given gentamicin (100 mg/kg/day s.c.), gentamicin and l...
Two α-conotoxins PnIA and PnIB (previously reported as being “mollusc specific”) which differ in only two amino acid residues (AN versus LS at residues 10 and 11, respectively), show markedly different inhibition of the neuronal nicotinic acetylcholine receptor response in bovine chromaffin...
The binding affinity of olanzapine, clozapine and atropine for muscarinic receptor subtypes in clonal Chinese hamster ovary (CHO) cell lines was compared in intact cells in physiological media to disrupted cells in hypotonic buffer. The affinity of olanzapine and clozapine, but not atropine, for...
The in vivo cardiovascular effect and in vitro vasorelaxant effect of harman, one of harmala alkaloids isolated from Peganum harmala , were examined in this study. Harman (1–10 mg/kg, i.v.) dose-dependently produced transient hypotension and long-lasting bradycardia in...
Effects of the δ-opioid receptor ligand, ( d -Pen 2 , d -Pen 5 )enkephalin (DPDPE) on basal and endothelin-1-induced ion secretion in guinea pig colon were investigated. Muscle-stripped segments of guinea pig colon were mounted in Ussing flux chambers and changes in the short-circuit current ( I...
Chronic administration of troglitazone might predispose to cardiac hypertrophy. The aims of the study were to determine if troglitazone could (i) initiate a trophic response directly in ventricular cardiomyocytes and (ii) modify responses to other trophic stimuli. After 24 h, troglitazone (10...
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