Source of angiopoietin-2 in the sera of women during pregnancy

Placental development requires coordinated angiogenesis regulated by multiple factors including angiopoietins. Previously we demonstrated that the concentration of angiopoietin-2 (Ang-2) in the sera of women rises markedly in pregnancy in early gestation. This increase is reduced in pregnancies subs...

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Veröffentlicht in:Microvascular research 2012-11, Vol.84 (3), p.367-374
Hauptverfasser: Woolnough, C., Wang, Y., Kan, C.Y., Morris, J.M., Tasevski, V., Ashton, A.W.
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container_end_page 374
container_issue 3
container_start_page 367
container_title Microvascular research
container_volume 84
creator Woolnough, C.
Wang, Y.
Kan, C.Y.
Morris, J.M.
Tasevski, V.
Ashton, A.W.
description Placental development requires coordinated angiogenesis regulated by multiple factors including angiopoietins. Previously we demonstrated that the concentration of angiopoietin-2 (Ang-2) in the sera of women rises markedly in pregnancy in early gestation. This increase is reduced in pregnancies subsequently complicated by intrauterine growth restriction (IUGR). We now show that the concentration of Ang-2, but not Ang-1, in maternal serum is increased during normal pregnancy, peaking at the end of the first trimester. We also demonstrate that a key source of the elevated Ang-2 levels during pregnancy is decidual endothelial cells (DECs) but not cytotrophoblasts. Secretion of Ang-2 by DECs relies on the release from intracellular stores and the synthesis of new Ang-2 protein and is regulated by serum factors at a translational level. Further studies on the role of Ang-2 during pregnancy are warranted as well as the evaluation of Ang-2 as a marker to predict adverse pregnancy outcomes. ► Ang-2, but not Ang-1, is elevated in maternal serum compared to non-pregnant serum. ► The key source of the elevated Ang-2 during pregnancy is decidual endothelial cells. ► Ang-2 release by DECs relies on intracellular stores and newly synthesized protein. ► The pregnancy-induced rise in Ang-2 in maternal sera is attenuated in IUGR.
doi_str_mv 10.1016/j.mvr.2012.08.003
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Previously we demonstrated that the concentration of angiopoietin-2 (Ang-2) in the sera of women rises markedly in pregnancy in early gestation. This increase is reduced in pregnancies subsequently complicated by intrauterine growth restriction (IUGR). We now show that the concentration of Ang-2, but not Ang-1, in maternal serum is increased during normal pregnancy, peaking at the end of the first trimester. We also demonstrate that a key source of the elevated Ang-2 levels during pregnancy is decidual endothelial cells (DECs) but not cytotrophoblasts. Secretion of Ang-2 by DECs relies on the release from intracellular stores and the synthesis of new Ang-2 protein and is regulated by serum factors at a translational level. 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source MEDLINE; Elsevier ScienceDirect Journals
subjects Adult
Angiopoietin-1 - blood
Angiopoietin-2 - blood
Decidua - pathology
Enzyme-Linked Immunosorbent Assay - methods
Female
Fetal Growth Retardation - blood
Gene Expression Regulation
Humans
Immunoglobulin G - metabolism
Keratin-7 - biosynthesis
Placenta - metabolism
Platelet Endothelial Cell Adhesion Molecule-1 - biosynthesis
Pregnancy
Pregnancy Outcome
Pregnancy Trimester, First
Trophoblasts - cytology
title Source of angiopoietin-2 in the sera of women during pregnancy
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