Abstract
To identify epigenetically silenced miRNAs and to investigate their influences on predictive target oncogenes in extranodal natural killer/T-cell lymphoma (NKTCL). Decitabine treatment was performed to evaluate methylated miRNAs in NKTCL cells. The relationship between a given miRNA and its target mRNA was validated using 24 tumor tissues. miR-379, miR-134, miR-20b, miR-376a, miR-654-3p, miR-143, miR-181c, miR-1225-5p, miR-1246, and miR-1275 were epigenetically silenced in SNK6 cells. miR-134, miR-376a, miR-143 and miR-181c significantly affected cellular viability. PDGFRα was regulated by miR-34a and miR-181c. miR-143, miR-20b and miR34a regulated STAT3 expression. miR-20b and miR-143 expression showed inverse correlations with STAT3 mRNA expression in NKTCL tissues. K-RAS was regulated by miR-181c. Downregulation of cell viability by salirasib treatment was identified. miRNAs were downregulated by DNA methylation, and several microRNAs affected the viability of NKTCL cells. miR-34a and miR-181c may be involved in the oncogenic progression of NKTCL through the regulation of PDGFRα, STAT3, and K-RAS.
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