In our study we had identified an association between the DUSP6 gene and chemotherapy- resistance in ovarian cancer SP cells, by using qRT‐PCR, we confirmed that DUSP6 expression was higher in ovarian cancer SP cells, and in other chemotherapy-resistant ovarian cancer cell lines and tissue samples, than in non-chemotherapy resistant cells (Figure 3a, 4a). The gene discussed is DUSP6; the disease is ovarian carcinoma.