Effects of excess thromboxane A2 on placental development and nutrient transporters in a Mus musculus model of fetal growth restriction

Karen Gibbins, Katherine N. Gibson-Corley, Ashley S. Brown, Matthew Wieben, Richard C. Law, Camille M. Fung

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Hypertensive disease of pregnancy (HDP) with placental insufficiency is the most common cause of fetal growth restriction (FGR) in the developed world. Despite the known negative consequences of HDP both to the mother and fetus, little is known about the longitudinal placental changes that occur as HDP progresses in pregnancy. This is because longitudinal sampling of human placentae during each gestation is impossible. Therefore, using a mouse model of thromboxane A2-analog infusion to mimic human HDP in the last trimester, we calculated placental efficiencies based on fetal and placental weights; quantified spongiotrophoblast and labyrinth thicknesses and vascular density within these layers; examined whether hypoxia signaling pathway involving vascular endothelial growth factor A (VEGFA) and its receptors (VEGFR1, VEGFR2) and matrix metalloproteinases (MMPs) contributed to vascular change; and examined nutrient transporter abundance including glucose transporters 1 and 3 (GLUT1, GLUT3), neutral amino acid transporters 1, 2, and 4 (SNAT1, SNAT2, and SNAT4), fatty acid transporters 2 and 4 (FATP2, FATP4), and fatty acid translocase (CD36) from embryonic day 15.5 to 19 in a 20-day C57Bl/6J mouse gestation. We conclude that early-to-mid gestation hypertensive placentae show compensatory mechanisms to preserve fetal growth by increasing placental efficiencies and maintaining abundance of important nutrient transporters. As placental vascular network diminishes over late hypertension, placental efficiency diminishes and fetal growth fails. Neither hypoxia signaling pathway nor MMPs mediated the vascular diminution in this model. Hypertensive placentae surprisingly exhibit a sex-differential expression of nutrient transporters in late gestation despite showing fetal growth failure in both sexes.

Original languageEnglish (US)
Pages (from-to)695-704
Number of pages10
JournalBiology of reproduction
Volume98
Issue number5
DOIs
StatePublished - May 1 2018
Externally publishedYes

Fingerprint

Placentation
Thromboxane A2
Fetal Development
Food
Pregnancy
Blood Vessels
Placenta
Matrix Metalloproteinases
Fatty Acids
Neutral Amino Acid Transport Systems
Placental Insufficiency
Fetal Weight
Facilitative Glucose Transport Proteins
Third Pregnancy Trimester
Inner Ear
Vascular Endothelial Growth Factor A
Fetus
Hypertension

ASJC Scopus subject areas

  • Reproductive Medicine
  • Cell Biology

Cite this

Effects of excess thromboxane A2 on placental development and nutrient transporters in a Mus musculus model of fetal growth restriction. / Gibbins, Karen; Gibson-Corley, Katherine N.; Brown, Ashley S.; Wieben, Matthew; Law, Richard C.; Fung, Camille M.

In: Biology of reproduction, Vol. 98, No. 5, 01.05.2018, p. 695-704.

Research output: Contribution to journalArticle

Gibbins, Karen ; Gibson-Corley, Katherine N. ; Brown, Ashley S. ; Wieben, Matthew ; Law, Richard C. ; Fung, Camille M. / Effects of excess thromboxane A2 on placental development and nutrient transporters in a Mus musculus model of fetal growth restriction. In: Biology of reproduction. 2018 ; Vol. 98, No. 5. pp. 695-704.
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