ArticleCellular and molecular life sciences : CMLS2026
Elektra-Qki and Alien-Wt1 lncRNA-protein interaction controls myocardial ion channel expression and epicardial EMT during heart development in mice.
Article in Cellular and molecular life sciences : CMLS, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundThe heart is the first organ to develop during embryogenesis and its development relies on coordinated interactions between the myocardium and the embryonic epicardium (EE), the third layer of the heart derived from the proepicardium (PE). A subset of epicardial cells undergoes an epithelial-to-mesenchymal transition (EMT), invades the subepicardial space and leads to epicardial-derived cells (EPDCs) colonizing the embryonic myocardium and differentiating into multiple cardiac lineages. However, the regulatory landscape governing these processes remains incomplete. In recent years, long non-coding RNAs (lncRNAs) have emerged as key regulators of cardiac development. Previous data from our laboratory identified two murine lncRNAs, Elektra and Alien, with differential expression during the transition from the PE to the EE.
methodsIn this study, we performed a multi-omic characterization of both lncRNAs across embryonic and adult tissues. Their transcriptional regulation was evaluated through cardiogenic transcription factors analysis, while their molecular interactomes were identified via RNA pull-down (PD) and mass spectrometry (MS) assays and subsequently validated by RNA immunoprecipitation (RIP). Functional impact was analyzed through loss-of-function experiments and RT-qPCR, focusing on cell migration and EMT dynamics, evidencing distinct roles for each lncRNA.
resultsElektra regulated the expression of ion channel genes in the myocardium through interaction with Qki protein, while Alien modulates the epicardial EMT process by interacting with Wt1 and controlling EMT-related genes, including Snai1, Snai2, Cdh1 and Cdh2.
conclusionAltogether, our findings reveal that Elektra and Alien exert important roles in cardiac development by regulating myocardial ion channel expression and epicardial EMT, respectively, supporting new insights into lncRNA-mediated regulation of heart morphogenesis in mice.
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