MiR-144 could inhibit cell progression through down-regulating CEP55 in vivo. (A) The tumor samples of miR-144 inhibitor group were the biggest while si-CEP55 and miR-144 mimics groups were the smallest. (B) The measurement of tumor volume showed that miR-144 inhibitor group had the biggest tumor and si-CEP55 and miR-144 mimics groups had the smallest tumor, *P < 0.05, compared with NC group and miR-144 inhibitor + si-CEP55 group, **P < 0.01, compared with miR-144 inhibitor group. (C) The measurement of tumor weight suggested that miR-144 inhibitor induced tumor growth and si-CEP55 and miR-144 mimics showed reverse function. *P < 0.05, compared with NC group, ##P < 0.01, compared with si-CEP55 group and miR-144 mimics group.