The number of cells that were positive for Ki67 was higher in CT26‐mP2X7R cells compared to that of CT26‐Con cells, while the expression of cleaved caspase‐3 was lower in CT26‐mP2X7R than CT26‐Con cells (Figure 2C,D), which suggests that P2X7R induces increased proliferation of cells in tumours, as well as reduced apoptosis rates. Here, MKI67 is linked to neoplasm.