AKT1 and central nervous system cancer: circNT5E, circ‐0014359, circCFH, circ_0037655, circPIP5K1A, and circFAM53B accelerated tumorigenesis via PI3K/AKT signaling pathway by sponging miR422a,90 miR‐153,91 miR‐149,92 miR‐214,93 miR‐515‐5p,94 and miR‐532‐3p,95 implying that these circRNAs may be a regulatory target for the treatment of gliomas.