ID 110206
Title Transcription
スイミン サーカディアン リズム キコウ カラ ミタ ケツアツ チョウセツ
Title Alternative
Blood pressure control by sleep and circadian mechanism
Author
Sei, Hiroyoshi Department of Integrated Physiology, Institute of Health Bioscience, The University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Keywords
blood pressure
sleep
circadian
clock gene
hypertension
apnea.
Content Type
Journal Article
Description
Morning surge and/or non-dipping type of hypertension have lately attracted considerableattention, because it has greater risk for cardio-or cerebro-vascular accident. Both sleep andcircadian mechanisms have important roles on the blood pressure(BP)control. Our works onthe control of BP by sleep or circadian system are summarized in this review.During REM sleep, even in mice, sleep apnea frequently occurs and BP shows large fluctuationwith spontaneous surges. The apnea is followed by a surge of BP. Acetazolamide, carbonicanhydrase inhibitors, increases the frequency of ventilation and suppresses the increase of BPduring REM sleep. Moderate hyperoxia(50% O2-N2balance)causes the decrease of ventilationfrequency and augments the increase of BP during REM sleep. These data suggest that, duringREM sleep, hypercapnea caused by the impaired ventilation may occur, which induces the increaseof BP via central chemoreceptor reflex.Clock is one of the main circadian-related genes. BP in the Clock mutant mice(Clockm)issignificantly higher than wild type(WT)during the light period. HR in the Clockm is significantlylower than WT during the dark period. Aderenalectomy induces the disappearance of significantdifference in the amplitude of BP and HR between the Clockm and WT. Concentration of plasmaaldosterone in the Clockm is lower than that in WT. On the other hand, plasma vasopressin in theClockm is higher than that in WT. It is possible that the altered function of water balance, whichis caused by the lack of normal Clock gene, may induce the non-dipping circadian profile of BP and HR.Sleep and circadian system have important roles on the cardiovascular function. It is necessaryto continue physiological in-vivo chronic experiments, in order to clarify the interaction betweensleep or circadian system and other factors relating to the cardiovascular diseases, such as TNFalpha,PAI-1 or IL-6 and so on.
Journal Title
四国医学雑誌
ISSN
00373699
NCID
AN00102041
Publisher
徳島医学会
Volume
63
Issue
5-6
Start Page
213
End Page
218
Sort Key
213
Published Date
2007-12-20
FullText File
language
jpn
TextVersion
Publisher
departments
Medical Sciences