MEIOB and breast carcinoma: The results showed that both mRNA and protein levels of MEIOB were dramatically upregulated in two TNBC cell lines, MDA-MB-231 and MDA-MB-468, while they were significantly lower in either normal breast epithelium or luminal breast cancer cells (Supplementary Figure S1A and S1B), indicating that MEIOB might play an important role in a subset of TNBCs.