MKI67 and neoplasm: Furthermore, IF analysis of Ki‐67 in the transplanted tumor specimens from the animals indicated that the M2‐Exos+Annexin V or M2/sh‐1232#1‐Exos group had lower expression of Ki‐67 than the mice injected with M2‐Exos or M2/sh‐NC‐Exos alone (Figure S3d, Supporting Information).