MMP9 and nasopharyngeal carcinoma: The up‐regulation of mature miR‐7‐1‐3p and miR‐15b‐5p inhibits the expression of target genes POLR3G, CALU, and KIF1B, further decreases the expression of VM‐related genes MMP9 and VE‐cadherin, and ultimately decreasing VM of NPC cells (Fig. 8).