Document Detail

Circadian melatonin concentration rhythm is lost in pregnant women with altered blood pressure rhythm.
MedLine Citation:
PMID:  15255280     Owner:  NLM     Status:  MEDLINE    
We assessed the correlation between the rhythm of melatonin concentration and circadian blood pressure patterns in normal and hypertensive pregnancy. Ambulatory 24-h blood pressure and blood samples every 4 h were monitored in 16 primigravidae who had shown an abnormal circadian blood pressure pattern (eight pre-eclamptic and eight normotensive) in pregnancy and 6-12 months after pregnancy. The circadian rhythm was analyzed by chronobiological measures. Eight normotensive women with maintained blood pressure rhythm served as controls. During pregnancy, melatonin concentration was significantly higher in pre-eclamptic than in normotensive women (pre-eclampsia, 29.4 +/- 1.9 pg/ml, normotensin, altered rhythm, 15.6 +/- 2.1; controls, 22.7 +/- 1.8; p < 0.001). This difference faded after pregnancy, owing to the fall observed in pre-eclampsia (11.8 +/- 3.2 pg/ml, 9.8 +/- 2.1, and 11.1 +/- 2.0, respectively; NS). The rhythm of melatonin concentration was lost in all pregnant women with loss of blood pressure rhythm. After pregnancy, normotensive women showed a reappearance of both melatonin and blood pressure rhythm, whereas pre-eclamptic women showed a reappearance of blood pressure but not melatonin rhythm. The loss of blood pressure rhythm in pregnancy is consistent with the loss of melatonin concentration rhythm. In pre-eclamptic women, the normalization of blood pressure rhythm, while melatonin rhythm remained altered, suggests a temporal or causal priority of circadian concentration of melatonin in the determination of blood pressure trend.
A L Tranquilli; A Turi; S R Giannubilo; E Garbati
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology     Volume:  18     ISSN:  0951-3590     ISO Abbreviation:  Gynecol. Endocrinol.     Publication Date:  2004 Mar 
Date Detail:
Created Date:  2004-07-16     Completed Date:  2004-07-29     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8807913     Medline TA:  Gynecol Endocrinol     Country:  England    
Other Details:
Languages:  eng     Pagination:  124-9     Citation Subset:  IM    
Department of Obstetrics and Gynecology, University of Ancona, Salesi Hospital, Ancona, Italy.
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MeSH Terms
Blood Pressure*
Circadian Rhythm*
Gestational Age
Hypertension / physiopathology*
Melatonin / blood*
Pre-Eclampsia / physiopathology
Pregnancy Complications, Cardiovascular / physiopathology*
Reg. No./Substance:

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