MKI67 and neoplasm: The number of Ki-67-positive tumor cells was significantly lower in tumors from mice treated with miR-873 than in those treated with control miRNA (PANC1, p = 0.0123; MiaPaCa-2, p = 0.0029; Figures 6E and 6F; MDA-MB-231, p = 0.0178; MDA-MB-436, p = 0.006; Figures 7E and 7F).