Document Detail


Polyol concentrations in the fluid compartments of the human conceptus during the first trimester of pregnancy: maintenance of redox potential in a low oxygen environment.
MedLine Citation:
PMID:  15562012     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Polyols are sugar alcohols formed by the reduction of aldoses and ketoses. Production is favored under conditions of low oxygenation, when it may provide an alternative means to production of lactate for regulating the oxidation-reduction balance of pyridine nucleotides. Polyols also act as important organic osmolytes and as precursors of cell membrane components. We measured free sugar and polyol concentrations in matched samples of maternal serum, intervillous fluid, coelomic fluid, and amniotic fluid from normal human pregnancies at 5-12 wk gestational age. The concentrations of fructose, inositol, sorbitol, erythritol, and ribitol were significantly higher in coelomic and amniotic fluids than in maternal serum, but the reverse was the case for glucose and glycerol. Intervillous fluid concentrations of inositol, mannitol, and sorbitol were also significantly higher than those in maternal serum. These results demonstrate that the polyol pathway, considered vestigial in adult tissues, is highly active in the human conceptus during early pregnancy. The pathway may serve to maintain ATP concentrations and cellular redox potential while the embryo develops in a low oxygen environment. Polyols may also play important physiological roles in development of the human conceptus, possibly drawing water and solutes across the placenta and expanding the gestational sac.
Authors:
Eric Jauniaux; Joanne Hempstock; Cecilia Teng; Frederick C Battaglia; Graham J Burton
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.     Date:  2004-11-23
Journal Detail:
Title:  The Journal of clinical endocrinology and metabolism     Volume:  90     ISSN:  0021-972X     ISO Abbreviation:  J. Clin. Endocrinol. Metab.     Publication Date:  2005 Feb 
Date Detail:
Created Date:  2005-02-08     Completed Date:  2005-03-24     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0375362     Medline TA:  J Clin Endocrinol Metab     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1171-5     Citation Subset:  AIM; IM    
Affiliation:
Academic Department of Obstetrics and Gynecology, Royal Free and University College London Medical School, London WC1E 6HX, UK.
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MeSH Terms
Descriptor/Qualifier:
Embryo, Mammalian / metabolism
Female
Fetus / metabolism*
Fructose / metabolism
Galactose / metabolism
Gestational Age
Glucose / metabolism
Glycerol / metabolism
Humans
Inositol / metabolism
Mannose / metabolism
Oxidation-Reduction
Oxygen Consumption
Polymers / metabolism*
Pregnancy
Pregnancy Trimester, First
Sorbitol / metabolism
Grant Support
ID/Acronym/Agency:
5-R01-HD34837-06/HD/NICHD NIH HHS
Chemical
Reg. No./Substance:
0/Polymers; 0/polyol; 26566-61-0/Galactose; 30237-26-4/Fructose; 31103-86-3/Mannose; 50-70-4/Sorbitol; 50-99-7/Glucose; 56-81-5/Glycerol; 6917-35-7/Inositol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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