| Roles of microRNA-34a in the pathogenesis of placenta accreta. | |
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MedLine Citation:
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PMID: 22672425 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Aim: MicroRNA-34a (miR-34a) is associated with invasion and metastasis of various cancers. The trophoblastic cells of placenta accreta invade into the myometrium in a similar way to the invasion of cancers. We studied the roles of miR-34a in the pathogenesis of placenta accreta. Methods: The human choriocarcinoma cell line JAR was used for in vitro experiments as a model of trophoblasts, and placental tissues from the operative specimen of patients with or without placenta accreta were used for experiments in vivo. Morpholino antisense oligomer against miR-34a (miR-34a Morpho/AS) was added to JAR, and the expression of miR-34a and plasminogen activator inhibitor-1 (PAI-1) was determined by real time PCR. The effects of antisense, interleukin (IL)-6 and IL-8 in the process of invasion were studied with an invasion assay. Expression of miR-34a in vivo was studied with the use of fluorescent in situ hybridization (FISH). Results: Expression of miR-34a was inhibited by 65% with the administration of antisense, and a slight increase in miR-34a expression was observed with the addition of IL-6 and IL-8. PAI-1 expression decreased with the addition of IL-6 and IL-8, and increased with the administration of antisense. There was an increase in invasive capacity through the inhibition of miR-34a expression. Strong FISH expression of miR-34a was observed in trophoblast cells of non-placenta accreta, and a clear decrease in miR-34a expression was observed in those of placenta accreta. Conclusions: Expression of miR-34a was downregulated in placenta accreta. In vitro experiments also showed that the invasive potential of JAR increased by suppressing miR-34a, probably through the expression of PAI-1. |
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Authors:
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Kota Umemura; Shin-Ichi Ishioka; Toshiaki Endo; Yoshiaki Ezaka; Madoka Takahashi; Tsuyoshi Saito |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-6-4 |
Journal Detail:
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Title: The journal of obstetrics and gynaecology research Volume: - ISSN: 1447-0756 ISO Abbreviation: J. Obstet. Gynaecol. Res. Publication Date: 2012 Jun |
Date Detail:
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Created Date: 2012-6-7 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9612761 Medline TA: J Obstet Gynaecol Res Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2012 The Authors. Journal of Obstetrics and Gynaecology Research © 2012 Japan Society of Obstetrics and Gynecology. |
Affiliation:
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Department of Obstetrics and Gynecology, Sapporo Medical University, Sapporo, Japan. |
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