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Positive Correlations Between Cerebral Protein Synthesis Rates and Deep Sleep in Macaca mulatta
Author(s) -
Nakanishi Hajime,
Sun Yun,
Nakamura Richard K.,
Mori Kentaro,
Ito Masanori,
Suda Sumio,
Namba Hiroki,
Storch Fredric I.,
Dang Thao P.,
Mendelson Wallace,
Mishkin Mortimer,
Kennedy Charles,
Gillin J. Christian,
Smith Carolyn Beebe,
Sokoloff Louis
Publication year - 1997
Publication title -
european journal of neuroscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.346
H-Index - 206
eISSN - 1460-9568
pISSN - 0953-816X
DOI - 10.1111/j.1460-9568.1997.tb01397.x
Subject(s) - sleep (system call) , electroencephalography , psychology , grey matter , period (music) , rapid eye movement sleep , slow wave sleep , neuroscience , audiology , anesthesia , physiology , medicine , white matter , magnetic resonance imaging , physics , computer science , acoustics , radiology , operating system
Local rates of cerebral protein synthesis (ICPS leu ), were determined with the autoradiographic L‐[1‐ 14 C]leucine method in seven awake and seven asleep, adult rhesus monkeys conditioned to sleep in a restraining chair in a darkened, ventilated chamber while EEG, EOG, and EMG were monitored. Prior to the period of measurement all animals slept for 1–4 h. Controls were awakened after at least one period of rapid‐eye‐movement (REM) sleep. Experimental animals were allowed to remain asleep, and they exhibited non‐REM sleep for 71–99% of the experimental period. Statistically significant differences in ICPS leu between control and experimental animals were found in four of the 57 regions of brain examined, but these effects may have occurred by chance. In the sleeping animals, however, correlations between ICPS leu , and percent time in deep sleep were positive in all regions and were statistically significant ( P ≤ 0.05) in 35 of the regions. When time in deep sleep was weighted for the integrated specific activity of leucine in grey matter, positive correlations were statistically significant ( P ≤ 0.05) in 18 regions in the experimental animals. These results suggest that rates of protein synthesis are increased in many regions of the brain during deep sleep compared with light sleep.