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Intraperitoneal guanosine has been shown to prevent quinolinic acid-induced seizures in mice. In this study, we investigated the effect of orally administered guanosine on seizures induced by the glutamate agonists quinolinic acid and kainate, and the endogenous glutamate releaser alpha-dendrotoxin. Guanosine (7.5 mg/kg, per os), administered 75 min in(More)
Glutamate is the major excitatory neurotransmitter of the central nervous system in vertebrates. Excitotoxicity, caused by over-stimulation of the glutamate receptors, is a major cause of neuron death in several brain diseases, including epilepsy. We describe here how behavioural seizures can be triggered in adult zebrafish by the administration of kainate(More)
Apolipoprotein E (ApoE) plays a relevant role in herpes simplex type 1 (HSV-1) infection of the CNS; after infection by the hematogenous route, the viral neuroinvasiveness directly depends on the APOE gene dose. To analyze the effect of ApoE isoforms on the HSV-1 infectivity to the brain, we have used a model of hematogenous infection of mice humanized for(More)
Apolipoprotein E (ApoE), a constituent of the lipoproteins, may be relevant in herpes simplex virus type 1 (HSV-1) infection of the central nervous system (CNS), since HSV-1 binds to human serum ApoE lipoproteins. This study demonstrates the involvement of ApoE in the hematogenous route of HSV-1 to the CNS.
Statins have recently been shown to act as protectants against several neuropathological conditions. They have received special attention in the field of Alzheimer's disease (AD), where epidemiological studies indicating a lower prevalence of AD/dementia in statin-prescribed populations. Excitotoxicity, which derives from the overstimulation of glutamate(More)
Recent clinical findings support the notion that the progressive deterioration of cholesterol homeostasis is a central player in Alzheimer's disease (AD). Epidemiological studies suggest that high midlife plasma total cholesterol levels are associated with an increased risk of AD. This paper reports the plasma cholesterol concentrations, cognitive(More)
This study analyzes the time course of the changes induced by subarachnoid hemorrhage (SAH) in the sensitivity of cat cerebral arteries to noradrenaline and serotonin. Cerebral arteries to noradrenaline and serotonin. Cerebral arteries displayed a supersensitivity to these amines, which was most marked 3 days after the experiment and then gradually(More)
Chick kainate binding protein was solubilized from cerebellar membranes and purified (x19) by use of two chromatographic steps. Measurements of [3H]kainate binding and GTPase activity in the different fractions reveal a consistent decrease of GTPase activity as the purification proceeds so that no GTPase is detectable after the final purification step. This(More)
Injection of chick cerebellar membranes, rich in kainate binding sites, into Xenopus oocytes resulted in the structural integration of chick membrane patches into the oocyte plasma membrane that could be easily identified by specific immunofluorescent staining. Application of kainate to the oocyte perfusion medium, under voltage-clamp conditions, induced(More)
Zebrafish is rapidly emerging as a promising model organism to study various central nervous system (CNS) disorders, including Alzheimer's disease (AD). AD is the main cause of dementia in the human population and there is an urgency to understand the causes of this neurodegenerative disease. In this respect, the development of new animal models to study(More)