Gestational diabetes mellitus modulates cholesterol homeostasis in human fetoplacental endothelium

Publication date: Available online 18 May 2018 Source:Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids Author(s): Yidan Sun, Susanne Kopp, Jasmin Strutz, Chaitanya Chakravarthi Gali, Martina Zandl-Lang, Elham Fanaee-Danesh, Andrijana Kirsch, Silvija Cvitic, Saša Frank, Richard Saffery, Ingemar Björkhem, Gernot Desoye, Christian Wadsack, Ute Panzenboeck Gestational diabetes mellitus (GDM) is associated with excessive oxidative stress which may affect placental vascular function. Cholesterol homeostasis is crucial for maintaining fetoplacental endothelial function. We aimed to investigate whether and how GDM affects cholesterol metabolism in human fetoplacental endothelial cells (HPEC). HPEC were isolated from fetal term placental arterial vessels of GDM or control subjects. Cellular reactive oxygen species (ROS) were detected by H2DCFDA fluorescent dye. Oxysterols were quantified by gas chromatography–mass spectrometry analysis. Genes and proteins involved in cholesterol homeostasis were detected by real-time PCR and immunoblotting, respectively. Cholesterol efflux was determined from [3H]-cholesterol labeled HPEC and [14C]-acetate was used as cholesterol precursor to measure cholesterol biosynthesis and esterification. We detected enhanced formation of ROS and of specific, ROS-derived oxysterols in HPEC isolated from GDM versus control pregnancies. ROS-generated oxysterols were simultaneously elevated in cord blood of GDM neonates...
Source: Biochimica et Biophysica Acta (BBA) Molecular and Cell Biology of Lipids - Category: Lipidology Source Type: research