Please use this identifier to cite or link to this item: https://repositorio.unifesp.br/handle/11600/57512
Title: Sleep restriction reduces the survival time and aggravates the neurological dysfunction and memory impairments in an animal model of cerebral hypoperfusion
Authors: Kim, Lenise Jihe [UNIFESP]
Coelho, Fernando Morgadinho [UNIFESP]
Araujo, Paula [UNIFESP]
Tedesco, Roberto Carlos [UNIFESP]
Souza, Rodrigo Barbosa [UNIFESP]
Tufik, Sergio [UNIFESP]
Andersen, Monica Levy [UNIFESP]
Keywords: Sleep restriction
Cerebral hypoperfusion
Neurological function
Memory
Mortality rate
Issue Date: 2016
Publisher: Elsevier Science Bv
Citation: Brain Research. Amsterdam, v. 1644, p. 213-221, 2016.
Abstract: Cerebral blood flow is associated with the cerebrovascular prognosis. Sleep restriction (SR) may be a limiting factor of the prognosis after a cerebrovascular event, impairing the neurological recovery. We aimed to investigate the effects of SR on mortality rate and on behavioral and histological parameters of animals submitted to permanent cerebral hypoperfusion. Sixty male Wistar rats were distributed in 4 groups, according to the protocol of common carotid artery occlusion (CCAO) and SR: nSR+nCCAO, SR+nCCAO, nSR+CCAO, and SR+CCAO. The groups SR+nCCAO and SR+CCAO were submitted to SR during 10 days. The cerebral hypoperfusion was induced by the permanent CCAO. Neurological function and memory were assessed over 14 days of cerebral hypoperfusion. Analysis of neuropathological alterations were performed in the CA1 region of hippocampus. The mortality rate was 40% in the nSR+CCAO and SR+CCAO groups. SR significantly reduced the survival time of animals submitted to CCAO. After 7 and 14 days of cerebral hypoperfusion, 11% and 33% of the nSR+CCAO and SR+CCAO animals showed severe neurological dysfunction, respectively. A significant association between a high frequency of memory impairments with the group SR+CCAO was observed. The neuropathological alterations in CA1 region of hippocampus were similar among the groups. SR potentiates the negative effects of cerebral hypoperfusion conditions, suggesting that SR could be a factor associated with a worse prognosis after a cerebrovascular event. (C) 2016 Elsevier B.V. All rights reserved.
URI: https://repositorio.unifesp.br/handle/11600/57512
ISSN: 0006-8993
Other Identifiers: http://dx.doi.org/10.1016/j.brainres.2016.05.010
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