Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 22, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/ijms22031332
Keywords
proliferation; migration; glioma; lncRNA; triplex target DNA sites; EphA2
Funding
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [368482240/GRK2416]
- DFG
- Excellence Initiative of the German federal and state governments, Prep Fund, RWTH Aachen [PFLS004]
- Excellence Initiative of the German federal and state governments [OPSF427, OPSF551]
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The study found that ephrinA5 stimulation decreased the expression of the cancer-related lncRNA Snhg15, suggesting a crucial role of Snhg15 in regulating gene transcription in response to ephrinA5-induced signaling.
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 Snhg15. In a human medulloblastoma cell line (DAOY) ephrinA5 stimulation similarly reduced SNHG15 expression. Computational analysis identified triple-helix-mediated DNA-binding sites of Snhg15 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 Snhg15 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.
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