Protective effect of the alpha2-adrenoceptor antagonist, dexefaroxan, against spatial memory deficit induced by cortical devascularization in the adult rat.

Abstract

The alpha2-adrenoceptor antagonist, dexefaroxan, has been shown in the rat to have neuroprotective and plastic effects against degenerative structural changes in elements of the basalocortical cholinergic system that result from cortical devascularization [Neuroscience 115 (2002) 41]. The present study, using the same experimental protocol, examined the functional consequences of cortical devascularization and dexefaroxan treatment in the Morris water maze memory test. Rats were first trained to find the hidden platform in the test, and then subjected to the devascularization procedure. Thirty-one days later, lesioned rats exhibited a significant deficit in recalling the platform location, compared with sham control animals. A 28-day subcutaneous infusion with dexefaroxan (0.63, 2.5, and 10 mg rat(-1) day(-1)), starting from the moment of the devascularization, protected against this spatial memory deficit.

• Authors: P Chopin, T Debeir, R Raisman-Vozari, F C Colpaert, M R Marien
• Journal: Experimental neurology (Exp Neurol) Vol. 185 Issue 1 Pg. 198-200 (Jan 2004) ISSN: 0014-4886 [Print] United States
• PMID: 14697331 (Publication Type: Journal Article)

Chemical References

• Adrenergic alpha-2 Receptor Antagonists
• Adrenergic alpha-Antagonists
• Benzopyrans
• Imidazoles
• dexefaroxan

Topics

• Adrenergic alpha-2 Receptor Antagonists
• Adrenergic alpha-Antagonists (pharmacology)
• Animals
• Behavior, Animal (drug effects)
• Benzopyrans (pharmacology)
• Brain Ischemia (complications, physiopathology)
• Cerebral Cortex (blood supply, physiopathology)
• Imidazoles (pharmacology)
• Male
• Memory Disorders (etiology, prevention & control)
• Rats
• Rats, Sprague-Dawley
• Spatial Behavior (drug effects)
• Vascular Surgical Procedures (methods)