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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.)

Sleep restriction reduces the survival time and aggravates the neurological dysfunction and memory impairments in an animal model of cerebral hypoperfusion

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Author(s):
Kim, Lenise Jihe [1] ; Coelho, Fernando Morgadinho [1, 2] ; Araujo, Paula [1] ; Tedesco, Roberto Carlos [3] ; Souza, Rodrigo Barbosa [3] ; Tufik, Sergio [1] ; Andersen, Monica Levy [1]
Total Authors: 7
Affiliation:
[1] Univ Fed Sao Paulo, Dept Psicobiol, Sao Paulo - Brazil
[2] Univ Fed Sao Paulo, Dept Neurol & Neurocirurgia, Sao Paulo - Brazil
[3] Univ Fed Sao Paulo, Dept Morfol & Genet, Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Brain Research; v. 1644, p. 213-221, AUG 1 2016.
Web of Science Citations: 0
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. (AU)

FAPESP's process: 13/14420-1 - The effects of sleep restriction in an animal model of ischemic brain injury
Grantee:Lenise Jihe Kim
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 14/10255-9 - Inflammatory activation induced by sleep deprivation: possible link between sleep and impairment of lipid metabolism
Grantee:Paula Cristina Alves Araújo
Support Opportunities: Scholarships in Brazil - Post-Doctoral