ArticleBrain pathology (Zurich, Switzerland)2026
A highly abundant circular RNA from the RMST locus plays a role in posterior fossa ependymoma pathogenesis.
Article in Brain pathology (Zurich, Switzerland), 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
Pediatric ependymoma (EPN) is one of the most common central nervous system cancers in children often accompanied by a poor prognosis. The circular RNA, circRMST, is known to be upregulated in posterior fossa (PF) EPN, but its functional role in the disease has not been explored. We found that circRMST is abundantly expressed in the cytoplasm of cancer cells in PF EPN patients. Moreover, knockdown of circRMST in EPN cancer stem cell-like cells induced differentiation-related pathways while the expression of cell cycle-related pathways was reduced, suggesting that it acts as an oncogene. We further validated these findings using flow cytometry-based cell cycle analysis and an in vitro serum-induced differentiation assay. Furthermore, we found that high circRMST expression and low promoter methylation levels are associated with poor prognosis. In conclusion, this study identifies circRMST as a novel oncogene in PF EPN.
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