In:
PLOS ONE, Public Library of Science (PLoS), Vol. 16, No. 1 ( 2021-1-12), p. e0245155-
Abstract:
Impaired utero-placental perfusion is a well-known feature of early preeclampsia and is associated with placental hypoxia and oxidative stress. Although aberrations at the level of the mitochondrion have been implicated in PE pathophysiology, whether or not hypoxia-induced mitochondrial abnormalities contribute to placental oxidative stress is unknown. Methods We explored whether abnormalities in mitochondrial metabolism contribute to hypoxia-induced placental oxidative stress by using both healthy term placentae as well as a trophoblast cell line (BeWo cells) exposed to hypoxia. Furthermore, we explored the therapeutic potential of the antioxidants MitoQ and quercetin in preventing hypoxia-induced placental oxidative stress. Results Both in placental explants as well as BeWo cells, hypoxia resulted in reductions in mitochondrial content, decreased abundance of key molecules involved in the electron transport chain and increased expression and activity of glycolytic enzymes. Furthermore, expression levels of key regulators of mitochondrial biogenesis were decreased while the abundance of constituents of the mitophagy, autophagy and mitochondrial fission machinery was increased in response to hypoxia. In addition, placental hypoxia was associated with increased oxidative stress, inflammation, and apoptosis. Moreover, experiments with MitoQ revealed that hypoxia-induced reactive oxygen species originated from the mitochondria in the trophoblasts. Discussion This study is the first to demonstrate that placental hypoxia is associated with mitochondrial-generated reactive oxygen species and significant alterations in the molecular pathways controlling mitochondrial content and function. Furthermore, our data indicate that targeting mitochondrial oxidative stress may have therapeutic benefit in the management of pathologies related to placental hypoxia.
Type of Medium:
Online Resource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0245155
DOI:
10.1371/journal.pone.0245155.g001
DOI:
10.1371/journal.pone.0245155.g002
DOI:
10.1371/journal.pone.0245155.g003
DOI:
10.1371/journal.pone.0245155.g004
DOI:
10.1371/journal.pone.0245155.g005
DOI:
10.1371/journal.pone.0245155.g006
DOI:
10.1371/journal.pone.0245155.t001
DOI:
10.1371/journal.pone.0245155.s001
DOI:
10.1371/journal.pone.0245155.s002
DOI:
10.1371/journal.pone.0245155.s003
DOI:
10.1371/journal.pone.0245155.s004
DOI:
10.1371/journal.pone.0245155.s005
DOI:
10.1371/journal.pone.0245155.s006
DOI:
10.1371/journal.pone.0245155.s007
DOI:
10.1371/journal.pone.0245155.s008
DOI:
10.1371/journal.pone.0245155.s009
DOI:
10.1371/journal.pone.0245155.r001
DOI:
10.1371/journal.pone.0245155.r002
DOI:
10.1371/journal.pone.0245155.r003
DOI:
10.1371/journal.pone.0245155.r004
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2021
detail.hit.zdb_id:
2267670-3
Permalink