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. 2022 Mar 10;8:31. doi: 10.1038/s41523-022-00397-y

Fig. 2. Tamoxifen inhibits double-strand DNA break repair and NHEJ efficiency in MCF-7 cells.

Fig. 2

The neutral comet assay was used to assess dsDNA break repair in MCF-7 cells treated with ± 500 nΜ tamoxifen ± 25 nM fulvestrant ± 4 Gy RT (a). Representative images of comets are shown. NHEJ efficiency in MCF-7 cells was assessed using a transient pEYFP reporter construct. Cells were treated with tamoxifen (b) or fulvestrant (c) with AZD7762, a Chk1/2 inhibitor, used as a negative control and NU7441, a DNAPK inhibitor, used as a positive control. Data from triplicate experiments are graphed as mean ± SEM. (*P < 0.05; **P < 0.01; ***P < 0.001).