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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Increased Disease Activity is Associated with Altered Sleep Architecture in an Experimental Model of Systemic Lupus Erythematosus

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Palma, Beatriz Duarte [1] ; Tufik, Sergio [1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Univ Fed Sao Paulo, Dept Psychobiol, BR-04024002 Sao Paulo - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Sleep; v. 33, n. 9, p. 1244-1248, SEP 1 2010.
Citações Web of Science: 9

Study Objectives: The aim of this study was to evaluate sleep patterns during the course of the disease in (NZB/NZW)F(1) mice, an experimental model of systemic lupus erythematosus (SLE). Design: Female mice were implanted with electrodes for chronic recording of sleep-wake cycles during the entire experimental phase (9, 19, and 29 weeks of age). The disease course was also assessed. At each time-point, blood samples were collected from the orbital plexus to evaluate serum antinuclear antibodies (ANA), which are important serologic parameters of disease evolution. Pain perception was also evaluated. Measurements and Results: During the dark phase, (NZB/NZW)F(1) mice aged 19 weeks spent more time in sleep, and, as a consequence, the total waking time was lower when compared with earlier periods. An augmented number of sleep-stage transitions and microarousals were observed at the 29(th) week of life in both light and dark phases. At this same time-point, the mice showed lower pain thresholds than they had at 9 weeks of life. The disease status was confirmed; the entire group of mice at 29 weeks of life showed positive ANA with high titer levels. Conclusions: The sleep-recording data showed that, during the progress and severe phases of the disease (19 and 29 wks of age, respectively), sleep architecture is altered. According to these results, increased sleep fragmentation, disease activity, and pain sensitivity are features observed in these mice, similar to symptoms of SLE. (AU)

Processo FAPESP: 06/57158-1 - Estudo do sono como fator prognóstico em um modelo experimental de doença auto imune
Beneficiário:Beatriz Duarte Palma Xylaras
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 98/14303-3 - Center for Sleep Studies
Beneficiário:Sergio Tufik
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs