A, HRD scores of endometrial cancer cell lines. B and C, Expression of BRCA1 and 2 in endometrial cancer cell lines. D, Effect of cisplatin treatment on endometrial cancer cell lines. E, Effect of olaparib treatment on endometrial cancer cell lines. F, Effect of paclitaxel treatment on endometrial cancer cell lines. The three cell lines with the highest HRD scores (Hec1a, Hec1b and KLE) were significantly more sensitive to all three agents tested (cisplatin, paclitaxel and olaparib) than were the cell lines with low (Ishikawa) or intermediate HRD score (AN3CA, Hec265)(p<0.001).