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Title

Galantamine postischemia provides neuroprotection and memory recovery against transient global cerebral ischemia in gerbils

AuthorsLorrio, Silvia; Sobrado, Mónica CSIC; Roda, José M.; López, Manuela G.
Issue Date2007
PublisherAmerican Society for Pharmacology and Experimental Therapeutics
CitationJournal of Pharmacology and Experimental Therapeutics 322(2): 591-599 (2007)
AbstractGalantamine, currently used in Alzheimer's patients, has shown neuroprotection in hippocampal slices subjected to oxygen-glucose deprivation. Here, we present an in vivo study to evaluate the potential neuroprotective effects of galantamine in a transient global cerebral ischemia model in gerbils. Three treatment protocols were used. In the pretreatment protocol, gerbils were treated before ischemia and for 3 consecutive days thereafter. Eight groups of animals were included: sham operation plus placebo, 10 mg/kg mecamylamine and 10 mg/kg galantamine, respectively; and ischemia plus placebo, 10 mg/kg mecamylamine, 1 mg/kg galantamine, and 10 mg/kg galantamine and 10 mg/kg mecamylamine plus galantamine, respectively. Postischemia protocols included three groups of animals: sham operation, ischemia plus placebo, and ischemia plus 10 mg/kg galantamine; substances were administered 3 or 6 h after ischemia and for 2 consecutive days thereafter. Pyramidal neurons surviving in the cornus ammonis 1 region of the hippocampus were evaluated 72 h after reperfusion, terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL) histochemistry, caspase-3 and superoxide dismutase (SOD)-2 immunohistochemistries, and Western blottings were performed, and object placement tests were carried out. Galantamine significantly increased the number of living pyramidal neurons after ischemia-reperfusion injury. Galantamine significantly reduced TUNEL, active caspase-3, and SOD-2 immunoreactivity. The nicotinic antagonist mecamylamine blocked the protective effects of galantamine. The neuroprotective effects of galantamine were preserved even when first administered at 3 h postischemia. These results correlated with the performance in the object placement test. This study shows that galantamine provides in vivo neuroprotection and memory recovery against global cerebral ischemia, even when administration begins 3 h postischemia. Copyright © 2007 by The American Society for Pharmacology and Experimental Therapeutics.
URIhttp://hdl.handle.net/10261/81751
DOIhttp://dx.doi.org/10.1124/jpet.107.122747
Identifiersdoi: 10.1124/jpet.107.122747
issn: 0022-3565
e-issn: 1521-0103
Appears in Collections:(IIBM) Artículos
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