BRCA1 and ovarian cancer: We selected the ovarian cancer‐resistant cell line SKOV3 as the parental cell line for the enrichment of stem cells, using previously published culture methods.24 Our experimental data indicated that there was a certain correlation between the expression of BRCA1 and the drug resistance genes in ovarian cancer tissues and also demonstrated a novel mechanism of BRCA1‐mediated autophagy‐related regulation of drug resistance.