MMP15 and cancer: Jia et al uncovered that up‐regulation of MAFG‐AS1 promoted the migration, invasion and EMT of NSCLC cell through serving as a miR‐339‐5p sponge to positively regulate the expression of MMP15.31 Additionally, previous studies showed that down‐regulation of MMP15 repressed invasion and metastasis in various cancers.32, 33