4.7 Article

miRNAs as common regulators of the transforming growth factor (TGF)-β pathway in the preeclamptic placenta and cadmium-treated trophoblasts: Links between the environment, the epigenome and preeclampsia

期刊

FOOD AND CHEMICAL TOXICOLOGY
卷 98, 期 -, 页码 50-57

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fct.2016.06.023

关键词

Preeclampsia; TGF-beta; JEG-3 cells; Gene expression; Epigenetics; miRNA

资金

  1. National Institute of Environmental Health Sciences [R01-ES019315, T32-ES007018, P42-ES005948]

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Preeclampsia (PE) is a pregnancy disorder characterized by high blood pressure and proteinuria that can cause adverse health effects in both mother and fetus. There is no current cure for PE other than delivery of the fetus/placenta. While the etiology is unknown, poor placentation due to aberrant signaling of growth and angiogenic factors has been postulated as a causal factor of PE. In addition, environmental contaminants, such as the metal cadmium (Cd), have been linked to placental toxicity and increased risk of developing PE. Here, we use a translational study design to investigate genomic and epigenomic alterations in both placentas and placental trophoblasts, focused on the angiogenesis-associated transforming growth factor-beta (TGF-beta) pathway. Genes within the TGF-beta pathway displayed increased expression in both the preeclamptic placenta and Cd-treated trophoblasts. In addition, miRNAs that target the TGF-beta pathway were also significantly altered within the preeclamptic placenta and Cd-treated trophoblasts. Integrative analysis resulted in the identification of a subset of Cd-responsive miRNAs, including miR-26a and miR-155, common to preeclamptic placentas and Cd-treated trophoblasts. These miRNAs have previously been linked to PE and are predicted to regulate members of the TGF-beta pathway. Results from this study provide future targets for PE treatment. (C) 2016 The Author(s). Published by Elsevier Ltd.

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