BRCA1 and breast cancer: This particular miRNA has, however, been reported to be overexpressed in human serous ovarian cancers in another study.18 Interestingly, in breast cancer, miR‐146a has been reported as being overexpressed in tumors with BRCA1/2 mutations.26 Furthermore, miR‐146a‐5p has also been shown to play a role in ovarian cancer progression and its expression is positively correlated with survival and resistance to platinum.18, 27 This miRNA was upregulated in our murine models that bear Brca1/2 deletions.