Publication Date:
1997-05-23
Description:
Both subjective and electroencephalographic arousal diminish as a function of the duration of prior wakefulness. Data reported here suggest that the major criteria for a neural sleep factor mediating the somnogenic effects of prolonged wakefulness are satisfied by adenosine, a neuromodulator whose extracellular concentration increases with brain metabolism and which, in vitro, inhibits basal forebrain cholinergic neurons. In vivo microdialysis measurements in freely behaving cats showed that adenosine extracellular concentrations in the basal forebrain cholinergic region increased during spontaneous wakefulness as contrasted with slow wave sleep; exhibited progressive increases during sustained, prolonged wakefulness; and declined slowly during recovery sleep. Furthermore, the sleep-wakefulness profile occurring after prolonged wakefulness was mimicked by increased extracellular adenosine induced by microdialysis perfusion of an adenosine transport inhibitor in the cholinergic basal forebrain but not by perfusion in a control noncholinergic region.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3599777/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3599777/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Porkka-Heiskanen, T -- Strecker, R E -- Thakkar, M -- Bjorkum, A A -- Greene, R W -- McCarley, R W -- R01 MH039683/MH/NIMH NIH HHS/ -- R37 MH39,683/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1997 May 23;276(5316):1265-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychiatry, Harvard Medical School, Brockton Veterans Administration Medical Center (VAMC), 116 A, 940 Belmont Street, Brockton, MA 02401, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9157887" target="_blank"〉PubMed〈/a〉
Keywords:
Adenosine/antagonists & inhibitors/*physiology
;
Animals
;
Cats
;
Electrophysiology
;
Microdialysis
;
Prosencephalon/physiology
;
Sleep/*physiology
;
Sleep Deprivation
;
Thioinosine/analogs & derivatives/pharmacology
;
Time Factors
;
Wakefulness/*physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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