To determine whether FOXP1 expression is involved in regulation of chemoresistance, a key characteristic of CSC, in ovarian cancer, the viability of A2780 or SKOV3 ovarian cancer cells was evaluated with FOXP1 knockdown or overexpression in the presence of chemotherapy reagents Paclitaxel or Cisplatin. The gene discussed is FOXP1; the disease is ovarian cancer.