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Pagina 1 a partire dal 16 risultati
[Study of the antihypoxic effect of eburnamonine in acute and recurrent anoxia on the cerebral electric activity in curarized rats. Comparison with vincamine].
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Using venous infusion (0.25 mg/kg min.), l-eburnamonine decreases the electroencephalographic modifications induced by acute asphyxic anoxia in curarized rats. This activity appears when the total dose administrated before the first asphyxia is approximatively 5 mg/kg. In such conditions, its
[Modifications by 1-eburnamonine and vincamine on 2,3-diphosphoglycerate blood levels in the presence or absence of histotoxic hypoxia produced by potassium cyanide in the awake rat].
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The influence of 1-éburnamonine (1-E) and vincamine (Vi) on 2,3-disphosphoglycerate (2,3-DPG) blood level was investigated in awake rats when cyanide (KCN) induced hypoxia was present or not. Used alone, KCN, 1-E and Vi (i.p. route) increased 2,3-DPG blood level. Used with KCN, 1-E or Vi produced a
[Use of the anti-hypoxia agent vincamine in disorders of the blood supply in the eye].
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[Comparative study of vincamine and rutovincine (LJ 533) on the cerebral hyperemia in rats with chronic hypoxia].
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Cerebroprotective drugs shorten the hypoxia-induced onset of electrical silence in unanesthetized rats.
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Pharmacological agents that delay the hypoxic arrest of neuronal electrical activity, as indicated by the suppression of electroencephalogram (EEG), have previously been thought to increase brain resistance to oxygen insufficiency. On the other hand, acceleration of the EEG suppression may offer
Protective effects of vinpocetine and structurally related drugs on the lethal consequences of hypoxia in mice.
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Vinpocetine has been compared with 3 structurally related drugs for activity in protecting mice from hypoxia-induced lethality upon i.p. administration. In order of potency, vinpocetine (ED50 = 16.6 mg/kg), 1-eburnamonine (ED50 = 21.0 mg/kg), vinconate (ED50 approximately 25 mg/kg), and vincamine
A comparison of some of the pharmacological properties of the new eburnamenine derivative vindeburnol with those of vincamine, vinburnine, dihydroergotoxine mesilate and nicergoline.
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The effects of a new eburnamenine derivative (3 beta,14 alpha, 16 alpha)-(+/-)-14,15-dihydro-20,21-dinoreburnamenin-14-ol (vindeburnol, RU 24722) on EEG, on brain energy metabolism and on local cerebral blood flow (LCBF) and in different experimental models of cerebral insufficiency were compared
Vinpocetine: nootropic effects on scopolamine-induced and hypoxia-induced retrieval deficits of a step-through passive avoidance response in rats.
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Vinpocetine, vincamine, aniracetam, and Hydergine, compounds with purported cognition activating activity, were evaluated for their ability to prevent scopolamine-induced and hypoxia-induced impairment of passive avoidance retention (24 hr) in rats. Vinpocetine (peak effect dose [PED]= 200 mg/kg
[Specific assessment of the cerebral and cardiac effects of asphyxic hypoxia. Application to the study of substances with protective activity].
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The influence of asphyxia on electrocorticogram (E. Co. G.) and electrocardiogram (E. C. G.) has been studied in curarized rats. The delay between the heightening of the ST component of E. C. G. and the disappearance of E. Co. G. pattern was measured. It provided more useful information on cerebral
Effects of vinburnine on experimental models of learning and memory impairments.
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Retrograde amnesia can be induced experimentally in mice by injecting them with scopolamine (3 mg/kg, IP) or by inducing seizures with pentylenetetrazol (50 mg/kg, IP), and in rats by subjecting them to hypobaric hypoxia (at a barometric pressure of 300 mmHg for 3 min). We have studied the effects
Cerebral metabolic, hemodynamic and antihypoxic properties of l-eburnamonine.
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l-Eburnamonine--16-oxoeburnane--assumes experimental cerebral 'oxygenator' and antihypoxic properties which appear more pronounced than those of vincamine. In anesthetized dogs, l-eburnamonine increases the cerebral oxygen supply and the cerebral oxygen consumption, without cerebral vasodilation;
Use of alveolar macrophages in antianoxic drug studies.
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Alveolar macrophages are able to adapt their energy metabolism to very difficult survival conditions. Gaseous phase culture is adaptable to alveolar macrophages because it reproduces in vitro conditions very similar to in vivo conditions. It is easy to modify the incubation gas composition for
Cerebroprotective effect of nicergoline and interference with the anti-hypoxic effect of prostacyclin.
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The cerebroprotective effect of nicergoline was studied using the following experimental methods: hypobaric and anoxic hypoxia in mice, complete ischemia by decapitation in mice, incomplete ischemia by bilateral carotid ligation in rats, hemic hypoxia in rats and asphyxic anoxia in cats. Xanthinol
Study on the anti-hypoxic effect of some drugs used in the pharmacotherapy of cerebrovascular disease.
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The anti-hypoxic effect of some agents used in the pharmacotherapy of cerebrovascular disease was studied using the following methods: incomplete ischemia by bilateral carotid ligation in rats, anoxic hypoxia by inhalation of argon in mice, and hemic hypoxia induced by injection of sodium nitrite
A new phthalidyl derivative of apovincaminic acid: (3 alpha,16 alpha)-eburnamenine-14 carboxylic acid phthalidyl ester (AF 698). A preliminary report on its chemical and pharmacological properties.
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A new phthalidyl derivative of apovincamine, (3 alpha,16 alpha)-eburnamenine-14 carboxylic acid phthalidyl ester (AF 698), has been synthesized as hydrochloride. Its chemical and physical properties are described and its acute toxicity and vasodilator effect assayed in comparison with vincamine
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