CXCR4 and ovarian cancer: CXCR4, CXCR7 and CXCL12 expression was evaluated in human ovarian cancer cells A2780, CAOV3, MDAH2274, TOV112D, SKOV3, OVCAR3, OVCAR4, OVCAR5, OVCAR8 and IGROV1 (Fig 1A and S1A Fig).