The Potent Antioxidant MitoQ Protects against Preeclampsia during Late Gestation but Increases the Risk of Preeclampsia When Administered in Early Pregnancy

Yang, Yike, Xu, Ping, Zhu, Fangyu, Liao, Jiujiang, Wu, Yue, Hu, Mingyu, Fu, Huijia, Qiao, Juan, Lin, Li, Huang, Biao, Jin, Huili, Liu, Xiyao, Zheng, Yangxi, Wen, Li, Saffery, Richard, Kilby, Mark D., Yan, Jianying, Kenny, Louise C., Qi, Hongbo, Tong, Chao and Baker, Philip N. (2021) The Potent Antioxidant MitoQ Protects against Preeclampsia during Late Gestation but Increases the Risk of Preeclampsia When Administered in Early Pregnancy. Antioxidants and Redox Signaling, 34 (2). pp. 118-136. ISSN 1523-0864

Full text not available from this repository. (Request a copy)

Abstract

Aims: Although preeclampsia (PE) has been attributed to excessive oxidative stress (OS) in the placenta, mild antioxidants failed to prevent PE in clinical trials. As mitochondria are a major source of OS, this study assessed the potential of a potent mitochondria-targeting antioxidant MitoQ in the prevention of PE. Results: Placentas from women with PE and from reduced uterine perfusion pressure (RUPP) mice demonstrated significantly higher OS, along with increased mitochondrial damage and compromised glutathione peroxidase (GPx) activities. MitoQ administration during late gestation alleviated RUPP-induced PE; whereas early-pregnancy MitoQ treatment not only exacerbated blood pressure, fetal growth restriction, and proteinuria but also reduced the labyrinth/spongiotrophoblast ratio and blood sinuses in the labyrinth. Invasion (Matrigel transwell) and migration (wound healing assay) of trophoblasts were greatly improved by 1 μM hydrogen peroxide (H2O2), but this improvement was abolished by MitoQ or MitoTempo. Mild OS enhanced the expression of miR-29b-3p, which regulates five genes involved in viability and mobility, in HTR8-S/Vneo cells. Innovation and Conclusions: Although the potent mitochondrial-targeting antioxidant MitoQ protects against hypertension and kidney damage induced by RUPP in mice when administered in late gestation, it exacerbates the PE-like phenotype when given in early gestation by interfering with placenta formation because mild OS is required to stimulate trophoblast proliferation, invasion, and migration. Eliminating trophoblastic OS during early pregnancy may lead to compromised placentation and a risk of diseases of placental origin. Therefore, antioxidant therapy for pregnant women should be carefully considered.

Item Type:	Article
Additional Information:	Publisher Copyright: © Copyright 2021, Mary Ann Liebert, Inc., publishers 2021.
Uncontrolled Keywords:	antioxidants,mitoq,oxidative stress,placentation,preeclampsia,redox homeostasis,biochemistry,physiology,molecular biology,clinical biochemistry,cell biology ,/dk/atira/pure/subjectarea/asjc/1300/1303
Faculty \ School:	Faculty of Medicine and Health Sciences > Norwich Medical School
Related URLs:	http://www.scopus.com/inward/record.url?... https://figshare.le.ac.uk/articles/journ...
Depositing User:	LivePure Connector
Date Deposited:	24 Jun 2025 13:30
Last Modified:	24 Jun 2025 13:30
URI:	https://ueaeprints.uea.ac.uk/id/eprint/99699
DOI:	10.1089/ars.2019.7891

Actions (login required)

View Item