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KIAA1429 Promotes Nasopharyngeal Carcinoma Progression by Mediating m6A Modification of PTGS2.
Emerging evidence suggests that dysregulation of a N6-methyladenosine (m6A) methyltransferase KIAA1429 participates in the pathogenesis of multiple cancers except for nasopharyngeal carcinoma (NPC). This study is aimed to explore the function of KIAA1429 in NPC progression. The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) datasets were used to confirm the mRNA expression in NPC by bioinformatic analysis. The levels of KIAA1429 and PTGS2 was detected by quantitative reverse transcription polymerase chain reaction and Western blotting. To investigate the effects of KIAA1429/PTGS2 knockdown or overexpression vectors on NPC cell malignancy, cell and animal experiments were performed. Finally, MeRIP and mRNA stability assays were used to verify the m6A modification and mRNA stability, respectively. KIAA1429 was upregulated in NPC tissues and cells. After transfecting KIAA1429 knockdown or overexpression vectors in NPC cells, we proved that KIAA1429 overexpression promoted proliferation, migration, invasion, and tumor growth, whereas KIAA1429 knockdown showed the opposite effect. Our results also indicated that KIAA1429 mediated m6A modification of PTGS2, enhancing PTGS2 mRNA stability in NPC cells. In addition, PTGS2 could also regulate the effects of KIAA1429 on NPC cell malignancy. This study confirmed the oncogenic function of KIAA1429 in NPC through m6A-modification of PTGS2, suggesting that targeting KIAA1429-mediated m6A modification of PTGS2 might provide a new therapeutic strategy for NPC.
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