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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

AMPA receptors mediate passive avoidance deficits induced by sleep deprivation

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Dubiela, Francisco Paulino [1] ; Queiroz, Claudio Marcos [2] ; Moreira, Karin Di Monteiro [1] ; Nobrega, Jose N. [3] ; Sita, Luciane Valeria [4] ; Tufik, Sergio [1] ; Hipolide, Debora Cristina [1]
Total Authors: 7
[1] Univ Fed Sao Paulo, Dept Psicobiol, BR-04024002 Sao Paulo - Brazil
[2] Univ Fed Rio Grande do Norte, Inst Brain, BR-59072970 Natal, RN - Brazil
[3] Ctr Addict & Mental Hlth, Neuroimaging Res Sect, Toronto, ON - Canada
[4] Univ Sao Paulo, Inst Ciencias Biomed, Dept Anat, BR-05508 Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Behavioural Brain Research; v. 257, p. 189-196, NOV 15 2013.
Web of Science Citations: 9

The present study addressed the effects of sleep deprivation (SD) on AMPA receptor (AMPAR) binding in brain regions associated with learning and memory, and investigated whether treatment with drugs acting on AMPAR could prevent passive avoidance deficits in sleep deprived animals. {[}H-3]AMPA binding and GluR1 in situ hybridization signals were quantified in different brain regions of male Wistar rats either immediately after 96 h of sleep deprivation or after 24 h of sleep recovery following 96 h of sleep deprivation. Another group of animals were sleep deprived and then treated with either the AMPAR potentiator, aniracetam (25, 50 and 100 mg/kg, acute administration) or the AMPAR antagonist GYKI-52466 (5 and 10 mg/kg, acute and chronic administration) before passive avoidance training. Task performance was evaluated 2 h and 24 h after training. A significant reduction in {[}H-3]AMPA binding was found in the hippocampal formation of SD animals, while no alterations were observed in GluR1 mRNA levels. The highest dose of aniracetam (100 mg/kg) reverted SD-induced impairment of passive avoidance performance in both retention tests, whereas GYKI-52466 treatment had no effect. Pharmacological enhancement of AMPAR function may revert hippocampal-dependent learning impairments produced after SD. We argue that such effects might be associated with reduced AMPAR binding in the hippocampus of sleep deprived animals. (C) 2013 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/09816-8 - Anatomical substrate for the neuroendocrine role of the incerto-hypothalamic area
Grantee:Luciane Valéria Sita
Support type: Regular Research Grants