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Psychosomatic Medicine, Vol 59, Issue 5 529-532, Copyright © 1997 by American Psychosomatic Society
ORIGINAL ARTICLES |
B Appelberg, H Katila and R Rimon
Department of Psychiatry, Helsinki University Central Hospital, Finland.
OBJECTIVE: It has been reported that sleep deprivation may enhance interleukin (IL)-1 beta production of healthy subjects. Furthermore, patients with acute psychoses have been reported to exhibit higher levels of IL-1 beta than healthy controls. The present study examined polysomnographic sleep and morning IL-1 beta plasma values in 20 drug-free patients with acute nonaffective psychoses. METHODS: Ten patients with DSM-III diagnosis of schizophrenia, five with delusional disorder, and five with atypical psychosis underwent polysomnographic sleep registrations and their morning blood levels of IL-1 beta were measured. RESULTS: IL-1 beta values correlated negatively with the length of the sleep period (p = 0.010) and the relative time of rapid eye movement (REM) sleep (p = 0.038), and positively with REM latency (p = 0.043). CONCLUSIONS: It is concluded that reduced sleep, possibly especially reduced REM sleep, may be a reason for increased morning IL-1 beta values in these patients. Additional studies on IL-1 beta in psychiatric patients should consider the possibility of sleep disturbances as a possible explanation for deviations in IL-1 beta levels.
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