The Expression of the Cancer-Associated lncRNA <i>Snhg15</i> Is Modulated by EphrinA5-Induced Signaling

• Main Authors: Daniel Pensold, Julia Gehrmann, Georg Pitschelatow, Asa Walberg, Kai Braunsteffer, Julia Reichard, Amin Ravaei, Jenice Linde, Angelika Lampert, Ivan G. Costa, Geraldine Zimmer-Bensch
• Format: Article
• Language: English
• Published: MDPI AG 2021-01-01
• Series: International Journal of Molecular Sciences
• Subjects: proliferation; migration; glioma; lncRNA; triplex target DNA sites; EphA2
• Online Access: https://www.mdpi.com/1422-0067/22/3/1332

The Eph receptor tyrosine kinases and their respective ephrin-ligands are an important family of membrane receptors, being involved in developmental processes such as proliferation, migration, and in the formation of brain cancer such as glioma. Intracellular signaling pathways, which are activated by Eph receptor signaling, are well characterized. In contrast, it is unknown so far whether ephrins modulate the expression of lncRNAs, which would enable the transduction of environmental stimuli into our genome through a great gene regulatory spectrum. Applying a combination of functional in vitro assays, RNA sequencing, and qPCR analysis, we found that the proliferation and migration promoting stimulation of mouse cerebellar granule cells (CB) with ephrinA5 diminishes the expression of the cancer-related lncRNA <i>Snhg15.</i> In a human medulloblastoma cell line (DAOY) ephrinA5 stimulation similarly reduced <i>SNHG15</i> expression. Computational analysis identified triple-helix-mediated DNA-binding sites of <i>Snhg15</i> in promoters of genes found up-regulated upon ephrinA5 stimulation and known to be involved in tumorigenic processes. Our findings propose a crucial role of <i>Snhg15</i> downstream of ephrinA5-induced signaling in regulating gene transcription in the nucleus. These findings could be potentially relevant for the regulation of tumorigenic processes in the context of glioma.