MKI67 and neoplasm: Immunohistochemistry and immunofluorescence staining revealed higher expression levels of SRC‐1 and Ki67 in the tumor regions of WT‐BMDM‐injected mice than in those of SRC‐1‐/‐ BMDM‐injected mice (Figure 4H), indicating the enhanced proliferative capacity of tumor cells in the WT‐BMDM group.