Related Experiment Video
Updated: Oct 11, 2025
Fetal Mouse Cardiovascular Imaging Using a High-frequency Ultrasound 30/45MHZ System
Published on: May 5, 2018
Gestational chronic intermittent hypoxia induces hypertension, proteinuria, and fetal growth restriction in mice
Cuilian Weng1, Long Huang1, Hangwei Feng1
1Department of Critical Care Medicine, Fujian Provincial Hospital South Branch, The Shengli Clinical Medical College of Fujian Medical University, Fuzhou, Fujian Province, China.
Purpose:
Pregnant women are predisposed to obstructive sleep apnea (OSA). Based on the fact that OSA is an independent risk factor for hypertension among the general population, we hypothesized that chronic intermittent hypoxia (CIH), as a feature of OSA, may lead to preeclampsia.
Methods:
Pregnant and non-pregnant C57BL/6 J mice were exposed to two conditions of chronic intermittent hypoxia: CIH1 (21-5% O2 alternations), CIH2 (21-10% O2 alternations), and room air until day 19.
Results:
In non-pregnant mice, compared with their respective baseline values, systolic blood pressure (SBP) started to rise from day 14 in the CIH1 group, and SBP rose until day 19 in the CIH2 group. Compared with the pregnant mice exposed to room air, pregnant mice exposed to CIH1 maintained elevated SBP from day 14, accompanied by proteinuria, fetal and placental growth restriction, and a reduction in the number of fetuses. An imbalance between proangiogenic and antiangiogenic factors and impairment of vascular remodeling existed in the placenta of pregnant mice exposed to CIH1. Maternal serum levels of the soluble form of vascular endothelial growth factor receptor-1 were also significantly increased. Pregnant mice exposed to CIH2 seemed to have milder changes than pregnant mice exposed to CIH1.
Conclusion:
Our results demonstrated that gestational CIH may induce gestational hypertension, proteinuria, fetal and placental growth restriction as well as impairments in placental angiogenesis and vascular remodeling.
