Placental miR-1301 is dysregulated in early-onset preeclampsia and inversely correlated with maternal circulating leptin

Item Type:	Article
Title:	Placental miR-1301 is dysregulated in early-onset preeclampsia and inversely correlated with maternal circulating leptin
Creators Name:	Weedon-Fekjaer, M.S. and Sheng, Y. and Sugulle, M. and Johnsen, G.M. and Herse, F. and Redman, C.W. and Lyle, R. and Dechend, R. and Staff, A.C.
Abstract:	INTRODUCTION: miRNAs are small non-coding RNAs important for the regulation of mRNA in many organs including placenta. Adipokines and specifically leptin are known to be dysregulated in preeclampsia, but little is known regarding their regulation by miRNAs during pregnancy. METHODS: We performed high-throughput sequencing of small RNAs in placenta from 72 well-defined patients: 23 early-onset preeclampsia (PE), 26 late-onset PE and 23 controls. The regulation of some miRNAs was confirmed on qRT-PCR. Maternal circulating levels and placental mRNA of leptin, resistin and adiponectin were measured using Bio-Plex and qRT-PCR. RESULTS: We found that miR-1301, miR-223 and miR-224 expression was downregulated in early-onset PE, but not in late-onset PE, compared to controls. In silico analysis predicted the leptin gene (LEP) to be a target for all three miRNAs. Indeed, we found significant correlation between maternal circulating levels of leptin and placental LEP expression. In addition, we found a significant inverse correlation between maternal circulating leptin/placental LEP expression and placental miR-1301 expression levels. Interestingly, placental expression of miR-1301 was also correlated with newborn weight percentile and inversely correlated with both maternal systolic and diastolic blood pressure prior to delivery. DISCUSSION: Our results confirm that placenta is a major site of LEP expression during pregnancy. It further suggests that miR-1301 could be involved in the regulation of leptin during pregnancy and may play a role in early-onset PE. CONCLUSIONS: miR-1301 is dysregulated in early-onset preeclampsia and could possibly play a role in the regulation of leptin during pregnancy.
Keywords:	miR-1301, Early-Onset Preeclampsia, Late-Onset Preeclampsia, Leptin, MicroRNA, High Throughput Sequencing
Source:	Placenta
ISSN:	0143-4004
Publisher:	Elsevier
Volume:	35
Number:	9
Page Range:	709-717
Date:	September 2014
Official Publication:	https://doi.org/10.1016/j.placenta.2014.07.002
PubMed:	View item in PubMed

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