Journal
INTERNATIONAL JOURNAL OF STEM CELLS
Volume 12, Issue 2, Pages 347-359Publisher
KOREAN SOC STEM CELL RESEARCH
DOI: 10.15283/ijsc19041
Keywords
Long non-coding RNA; LINC00525; Colorectal cancer; miR-507; ELK3
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Background and Objectives: This study aims to explore the effects of a long non-coding RNA, LINC00525, on colorectal cancer (CRC) and its underlying molecular mechanisms. Methods: The qPCR, MTT, colony formation, Western blotting, Luciferase reporter and biotin pull-down, shRNA knockdown and DNA fragmentation assays were performed in this study. Results: High expressions of LINC00525 were associated with poor prognosis of CRC patients. LINC00525 knockdown decreased sternness properties and increased sensitivities to oxaliplatin. MiR-507 was a direct target of LINC00525 and overexpression of miR-507 significantly decreased abilities of tumorsphere formation and cell growth. Overcxpression of miR-507 resulted in a decrease of expression of cancer stem cell markers and the increase of apoptosis rates. MiR-507 regulated the expression of ELK3. In addition, LINC00525 knockdown decreased the expression of ELK3. Restoration of ELK3 expression abrogated the effects of LINC00525 knockdown. LINC00525 could be served s prognostic marker of CRC. Conclusions: LINC00525 enhanced sternness properties and increased sensitivities of CRC cells to oxaliplatin by targeting miR-507/ELK3 axis.
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