of borderline significanceP = 0.021
In comparison with the siNT control, transfection with siFEN1 resulted in a significant decrease in colony numbers for the BRCA -deficient cell lines (PEO1, UWB1.289, HCC1937), whereas only one (OVCAR-3) of the three BRCA -proficient cell lines (PEO4, OV-90, OVCAR-3) showed a small decrease in colony number that was of borderline significance ( P = 0.021) ( Fig. 4 C ).