Cited by 66Pregnancy and preeclampsia studiesMicroRNA in disease regulationReproductive System and Pregnancy

miR-34a expression, epigenetic regulation, and function in human placental diseases

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Doridot, Ludivine, Houry, Dorothée, Gaillard, Harald, Chelbi, Sonia T, Barbaux, Sandrine, Vaiman, Daniel·2014·Epigenetics

Abstract

Preeclampsia (PE) is the major pregnancy-induced hypertensive disorder responsible for maternal and fetal morbidity and mortality that can be associated with intrauterine growth restriction (IUGR). PE and IUGR are thought to be due to a placental defect, occurring early during pregnancy. Several placental microRNAs (miRNAs) have been shown to be deregulated in the context of placental diseases and could thus play a role in the pathophysiology of PE. Here, we show that pri-miR-34a is overexpressed in preeclamptic placentas and that its placental expression is much higher during the first trimester of pregnancy than at term, suggesting a possible developmental role. We explored pri-miR-34a regulation and showed that P53, a known activator of miR-34a, is reduced in all pathological placentas and that hypoxia can induce pri-miR-34a expression in JEG-3 cells. We also studied the methylation status of the miR-34a promoter and revealed hypomethylation in all preeclamptic placentas (associated or not with IUGR), whereas hypoxia induced a hypermethylation in JEG-3 cells at 72 h. Despite the overexpression of pri-miR-34a in preeclampsia, there was a striking decrease of the mature miR-34a in this condition, suggesting preeclampsia-driven alteration of pri-miR-34a maturation. SERPINA3, a protease inhibitor involved in placental diseases, is elevated in IUGR and PE. We show here that miR-34a overexpression in JEG-3 downregulates SERPINA3. The low level of mature miR-34a could thus be an important mechanism contributing to SERPINA3 upregulation in placental diseases. Overall, our results support a role for miR-34a in the pathophysiology of preeclampsia, through deregulation of the pri-miRNA expression and its altered maturation.

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  • Micro-RNAs identified as being differentially expressed under hypoxia include miR-93, miR-205, miR-224, MiR-335, MiR-424, miR-451, miR-491 and mIR-34a.

    “Many of these Other micro-RNAs identified as being differentially expressed under hypoxia include miR-93, miR-205, miR-224, MiR-335, MiR-424, miR-451 and miR-491 (396, 397), and mIR-34a (154), but little is known regarding their functional significance at present.”

    From Placental Origins of Chronic Disease (2016) · cites this paper as [154]

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  1. Sibai BM. Thrombophilia and severe pre- eclampsia: time to screen and treat in future pregnancies? Hypertension 2005; 46:1252-3; PMID:16286582; http://dx.doi.org/10.1161/01. HYP.0000188904.47575. · DOI

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Authors
Doridot, L., Houry, D., Gaillard, H., Chelbi, S. T., Barbaux, S., & Vaiman, D.
Affiliations
Centre National de la Recherche Scientifique (FR)
Corresponding author
Vaiman, Daniel
Venue
Epigenetics
Published
2013-09-30
Volume
9
Issue
1
Pages
142-151
ISSN
  • 1559-2294 (ISSN-L)
  • 1559-2308
OpenAlex
W2020698835
Cited by
65
References
40
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 7 · 2022: 8 · 2021: 7 · 2020: 2 · 2019: 5 · 2018: 4 · 2017: 5 · 2016: 8 · 2015: 9 · 2014: 4 · 2013: 1
FWCI
8.22
Type
journal article
Language
en
Open access
Locations
  • Epigenetics (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Obstetrics and Gynecology › Pregnancy and preeclampsia studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Immunology and Microbiology › Immunology › Reproductive System and Pregnancy
Keywords
miR-34a, preeclampsia, fetal growth restriction, placental disease, DNA methylation, hypoxia, p53, alpha-1-antichymotrypsin, protease inhibitors, JEG-3 cells, epigenetic regulation
MeSH terms
Hypoxia, Choriocarcinoma, Female, Humans, Placenta Diseases, Pre-Eclampsia, Pregnancy, Promoter Regions, Genetic, Uterine Neoplasms, Serpins, Tumor Suppressor Protein p53, DNA Methylation, MicroRNAs, Epigenesis, Genetic, Cell Line, Tumor

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