A, Scheme for generating the list of R-loop regulators identified by published proteomic studies. B, mRNA expression levels of R-loop resolution genes in PARPi-sensitive (PEO1, UWB1.289) and PARPi-resistant HGSOC cell lines (PEO1/OlaR, PEO1/OlaJR, UWB/OlaR) were analyzed by qPCR (n = 3). C, Venn diagram showing the overlap of upregulated R-loop regulators in PARPi-resistant BRCAm HGSOC cells. Data were analyzed using one-way ANOVA test and shown as mean ± SEM. *, P < 0.05; **, P < 0.01; ***, P < 0.001.