The percentage of ALDH-positive cells in ovarian cancer cell lines as determined by flow cytometry exhibited a significant increase in A2780-olaR (Fig. 1F) and SKOV3-olaR (Fig. 1H) cell lines compared to that in A2780 and SKOV3 cell lines, suggesting an augmentation in the stemness of PARPi-resistant cells. This evidence concerns the gene LDHA and ovarian carcinoma.