PTEN and neoplasm: Besides, expression of EZH2, p‐PI3K, p‐AKT and Ki‐67 was decreased, and expression of PTEN and miR‐30b‐5p was elevated in tumour tissues of nude mice injected with oe‐EZH2 + exo‐miR‐30b‐5p, but further addition of SC79 elevated expression of p‐PI3K, p‐AKT and Ki‐67, and exerted no alteration in expression of miR‐30b‐5p, EZH2 and PTEN (Figures 5C–E and S3A).