Document Detail

Fetoplacental growth and vascular development in overnourished adolescent sheep at day 50, 90 and 130 of gestation.
MedLine Citation:
PMID:  19164488     Owner:  NLM     Status:  In-Process    
To establish the basis for altered placental development and function previously observed at late gestation, fetoplacental growth and placental vascular development were measured at three stages of gestation in a nutritional paradigm of compromised pregnancy. Singleton pregnancies to a single sire were established and thereafter adolescent ewes were offered an optimal control (C) or a high (H) dietary intake. At day 50, the H group had elevated maternal insulin and amniotic glucose, whereas mass of the fetus and placenta were unaltered. At day 90, the H group exhibited elevated maternal insulin, IGF1 and glucose; fetal weight and glucose concentrations in H were increased relative to C, but placental weight was independent of nutrition. By day 130, total placentome weight in the H group was reduced by 46% and was associated with lower fetal glucose and a 20% reduction in fetal weight. As pregnancy progressed from day 50 to 130, the parameters of vascular development in the maternal and fetal components of the placenta increased. In the fetal cotyledon, high dietary intakes were associated with impaired vascular development at day 50 and an increase in capillary number at day 90. At day 130, all vascular indices were independent of nutrition. Thus, high dietary intakes to promote rapid maternal growth influence capillary development in the fetal portion of the placenta during early to mid-pregnancy and may underlie the subsequent reduction in placental mass and hence fetal nutrient supply observed during the final third of gestation.
Dale A Redmer; Justin S Luther; John S Milne; Raymond P Aitken; Mary Lynn Johnson; Pawel P Borowicz; Magda A Borowicz; Lawrence P Reynolds; Jacqueline M Wallace
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2009-01-22
Journal Detail:
Title:  Reproduction (Cambridge, England)     Volume:  137     ISSN:  1741-7899     ISO Abbreviation:  Reproduction     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-04-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100966036     Medline TA:  Reproduction     Country:  England    
Other Details:
Languages:  eng     Pagination:  749-57     Citation Subset:  IM    
Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen, UK.
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