BRCA1 and cancer: Encouragingly, G1 cells subjected to TTFields (72 h, 200 kHz, 1.33 Vcm RMS) using this methodology were found to exhibit reduced BRCA1 expression in comparison to the TTFields-untreated GSC control (Figure 4E,F), which is consistent with previous findings in 2D TTFields cancer cell models [31,32,33].