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  • Title: LncRNA FEZF1-AS1 promotes colorectal cancer progression through regulating the miR-363-3p/PRRX1 pathway.
    Author: Zhang T, Yu S, Zhao S.
    Journal: Adv Clin Exp Med; 2021 Aug; 30(8):839-848. PubMed ID: 34286520.
    Abstract:
    BACKGROUND: Long non-coding RNAs (lncRNAs) are involved in the development of many cancers, including colorectal cancer (CRC). FEZ family zinc finger 1 antisense RNA 1 (FEZF1-AS1) is a key lncRNA in the regulation of CRC progression, but its potential molecular mechanisms need to be further explored. OBJECTIVES: To investigate the mechanism of lncRNA FEZF1-AS1 in the progression of CRC. MATERIAL AND METHODS: Quantitative real-time polymerase chain reaction (qRT-PCR) was performed to measure FEZF1-AS1 and miR-363-3p expression. Cell proliferation, migration and invasion were analyzed using Cell Counting Kit-8 (CCK-8) and transwell assays. Protein expression of epithelial-mesenchymal transformation (EMT)-related markers and paired-related homeobox 1 (PRRX1) were determined using western blot analysis. The interactions among FEZF1-AS1, miR-363-3p and PRRX1 were verified with dual-luciferase reporter assay. A xenograft model was constructed in vivo to confirm the role of FEZF1-AS1 in CRC tumor growth. RESULTS: We demonstrated that FEZF1-AS1 expression was upregulated in CRC, and its silencing reduced CRC cell proliferation, migration, invasion, and EMT. MiR-363-3p could be inhibited by FEZF1-AS1, which inhibitor could reverse the suppressive effect of FEZF1-AS1 silencing on CRC progression. Paired-related homeobox 1 could be targeted by miR-363-3p, and the inhibitory effect of FEZF1-AS1 knockdown on CRC progression could also be eliminated by PRRX1 overexpression. Furthermore, interference of FEZF1-AS1 reduced the tumor growth of CRC in vivo. CONCLUSIONS: Our data demonstrate that FEZF1-AS1 regulated PRRX1 expression to promote CRC progression via inhibition of miR-363-3p.
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