VCAM1 and neoplasm: Co-transplantation of VCAM-1-knockdown 3T3 fibroblasts with 4T1 cells into BALB/c mice resulted in markedly reduced tumor growth with significantly increased tumor-infiltrating T-cells, compared to co-transplanting control 3T3 fibroblasts with 4T1 cells (Figure 4J, Figure S4J).