MIF and ovarian carcinoma: Other proteins of interest were Protein DJ-1, shown to be crucial for the peritoneal metastasis of gastric cancer54, Agrin, a proteoglycan, which has been shown to play an oncogenic role in hepatocellular carcinoma55 and previously identified in ascites of ovarian cancer patients56, and the inflammatory cytokine MIF, shown to contribute to immune escape of ovarian cancer patients by down regulating NK cell receptor NKG2D57.