MKI67 and non-small cell lung carcinoma: We performed cell function experiments after co-transfecting sh-circ-MBOAT2#1 and miR-664b-3p inhibitor into A549 cells, and the experimental results showed that inhibition of miR-664b-3p impaired the suppression of NSCLC cell proliferation and Ki-67 expression levels by knockdown of circ-MBOAT2 (Fig. 4A, B, D).