Document Detail

Impact of maternal and neonatal iron status on placental transferrin receptor expression in pregnant adolescents.
MedLine Citation:
PMID:  20828813     Owner:  NLM     Status:  In-Process    
OBJECTIVE: To elucidate the role of maternal and neonatal iron status on placental transferrin receptor (TfR) expression. STUDY DESIGN AND OUTCOMES: Ninety-two healthy pregnant adolescents (ages 14-18 years) were followed across pregnancy. Maternal iron status (hemoglobin, hematocrit, serum ferritin, TfR, and total body iron) was assessed in mid-gestation (21-25 wks) and at delivery in the mother and neonate. Placental TfR protein expression was assessed by western blot in placental tissue collected at delivery.
RESULTS: Placental TfR expression was inversely associated with maternal iron status at mid-gestation (hemoglobin p = 0.046, R(2) = 0.1 and hematocrit p = 0.005, R(2) = 0.24) and at delivery (serum ferritin p = 0.02, R(2) = 0.08 and total body iron p = 0.02, R(2) = 0.07). Mothers with depleted body iron stores had significantly greater placental expression of TfR than mothers with body iron stores greater than zero (p = 0.003). Neonatal iron stores were also inversely associated with the expression of placental TfR (p = 0.04, R(2) = 0.06). Neonates with serum ferritin values ≤ 34 μg/L had significantly greater protein expression of placental TfR compared to neonates with cord serum ferritin values >34 μg/L (p = 0.01).
CONCLUSIONS: Expression of placental TfR is associated with both maternal and neonatal iron demands. Increased expression of placental TfR may be an important compensatory mechanism in response to iron deficiency in otherwise healthy pregnant women.
M F Young; E Pressman; M L Foehr; T McNanley; E Cooper; R Guillet; M Orlando; A W McIntyre; J Lafond; K O O'Brien
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2010-09-15
Journal Detail:
Title:  Placenta     Volume:  31     ISSN:  1532-3102     ISO Abbreviation:  Placenta     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-10-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8006349     Medline TA:  Placenta     Country:  England    
Other Details:
Languages:  eng     Pagination:  1010-4     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Ltd. All rights reserved.
Cornell University, Division of Nutritional Sciences, Savage Hall 230, Ithaca, NY 14853, USA.
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