CAPN1 and breast cancer: For example, CAPN1 has been reported to be an independent marker for poor relapse‐free survival in breast cancer patients treated with trastuzumab,32 and inhibition of CAPN1 could attenuate cisplatin‐induced apoptosis in triple‐negative breast cancer (TNBC) cells,33 moreover, CAPN1 is positively correlated with lymph node status of TNBC patients, suggesting its role as a prognostic factor.13