Initially, to determine whether PHF19 is involved in the regulation of drug-resistance of ovarian cancer cells to CFG, we detected the protein expression of PHF19 in four ovarian cancer cell lines HEY-T30, SKOV3, A2780, and OVCAR3 and determined the viability of these cell lines with different doses of CFG treatment. This evidence concerns the gene PHF19 and ovarian carcinoma.