To define whether inhibition of TAK1 can sensitize ovarian cancer cells to cisplatin-induced cell apoptosis, XTT cell proliferation assay was performed in the TAK1 knockdown clones SK-sh1-KD3, SK-sh1-KD6, Acp-sh1-KD1 and Acp-sh2-KD10. The gene discussed is NDUFAB1; the disease is ovarian cancer.