Maternal Iron Deficiency Alters Trophoblast Differentiation and Placental Development in Rat Pregnancy.

Autor:	Roberts H; Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, N6A5C1, Canada., Woodman AG; Department of Anesthesiology & Pain Medicine, University of Alberta, Edmonton, Alberta, T6G2E1, Canada.; Department of Pharmacology, University of Alberta, Edmonton, Alberta, T6G2E1, Canada.; Department of Pediatrics, University of Alberta, Edmonton, Alberta, T6G2E1, Canada., Baines KJ; Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, N6A5C1, Canada., Jeyarajah MJ; Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, N6A5C1, Canada., Bourque SL; Department of Anesthesiology & Pain Medicine, University of Alberta, Edmonton, Alberta, T6G2E1, Canada.; Department of Pharmacology, University of Alberta, Edmonton, Alberta, T6G2E1, Canada.; Department of Pediatrics, University of Alberta, Edmonton, Alberta, T6G2E1, Canada., Renaud SJ; Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, N6A5C1, Canada.; Children's Health Research Institute, Lawson Health Research Institute, London, Ontario, N6C2V5, Canada.
Jazyk:	angličtina
Zdroj:	Endocrinology [Endocrinology] 2021 Dec 01; Vol. 162 (12).
DOI:	10.1210/endocr/bqab215
Abstrakt:	Iron deficiency, which occurs when iron demands chronically exceed intake, is prevalent in pregnant women. Iron deficiency during pregnancy poses major risks for the baby, including fetal growth restriction and long-term health complications. The placenta serves as the interface between a pregnant mother and her baby, and it ensures adequate nutrient provisions for the fetus. Thus, maternal iron deficiency may impact fetal growth and development by altering placental function. We used a rat model of diet-induced iron deficiency to investigate changes in placental growth and development. Pregnant Sprague-Dawley rats were fed either a low-iron or iron-replete diet starting 2 weeks before mating. Compared with controls, both maternal and fetal hemoglobin were reduced in dams fed low-iron diets. Iron deficiency decreased fetal liver and body weight, but not brain, heart, or kidney weight. Placental weight was increased in iron deficiency, due primarily to expansion of the placental junctional zone. The stimulatory effect of iron deficiency on junctional zone development was recapitulated in vitro, as exposure of rat trophoblast stem cells to the iron chelator deferoxamine increased differentiation toward junctional zone trophoblast subtypes. Gene expression analysis revealed 464 transcripts changed at least 1.5-fold (P < 0.05) in placentas from iron-deficient dams, including altered expression of genes associated with oxygen transport and lipoprotein metabolism. Expression of genes associated with iron homeostasis was unchanged despite differences in levels of their encoded proteins. Our findings reveal robust changes in placentation during maternal iron deficiency, which could contribute to the increased risk of fetal distress in these pregnancies. (© The Author(s) 2021. Published by Oxford University Press on behalf of the Endocrine Society. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
Databáze:	MEDLINE
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