IL13RA2 and ovarian cancer: IL‐13 has been shown to bind with high affinity to IL‐13Rα2, thereby promoting invasion and metastasis of ovarian cancer cells.12 Because we found increased levels of IL‐13 in monocyte‐CM from PCa‐M (Figure 4D), we tested the effects of rhIL‐13 alone or combined with 10 nmol/L rhCHI3L1 in ARCaPM invasiveness.