LncRNA -Derived Accelerates the Invasion of Extravillous Trophoblast Cells by Inhibiting and Subsequently Activating Matrix Metalloproteinases.

The invasion of extravillous trophoblast (EVT) cells into the maternal decidua, which plays a crucial role in the establishment of a successful pregnancy, is highly orchestrated by a complex array of regulatory mechanisms. Non-coding RNAs (ncRNAs) that fine-tune gene expression at epigenetic, transcriptional, and post-transcriptional levels are involved in the regulatory mechanisms of EVT cell invasion. However, little is known about the characteristic features of EVT-associated ncRNAs. To elucidate the gene expression profiles of both coding and non-coding transcripts (i.e., mRNAs, long non-coding RNAs (lncRNAs), and microRNAs (miRNAs)) expressed in EVT cells, we performed RNA sequencing analysis of EVT cells isolated from first-trimester placentae. RNA sequencing analysis demonstrated that the lncRNA and its derived miRNA were enriched in EVT cells. Although acts as a placental/trophoblast growth suppressor, there is little information on the involvement of in trophoblast cell invasion. Next, we evaluated a possible role of in EVT cell invasion using the EVT cell lines HTR-8/SVneo and HChEpC1b; overexpression of significantly promoted the invasion of both EVT cell lines. The transcription factor gene was shown to be a target of ; moreover, small interfering RNA-mediated knockdown significantly promoted cell invasion. Furthermore, we identified MMP13 and MMP14 as downstream effectors of /-dependent EVT cell invasion. These findings suggest that -mediated inhibition accelerates EVT cell invasion by upregulating matrix metalloproteinases.