PPM1F and hepatocellular carcinoma: It has also been revealed that circRNA SLC3A2 is up‐regulated in HCC tissues and stimulates cell proliferation and invasion by sponging miR‐490‐3p and up‐regulating PPM1F expression, suggesting that circSLC3A2 might function as an oncogenic factor in HCC through modulation of miR‐490‐3p/PPM1F axis.