TMTC3 and breast cancer: Likewise, we also detected the expression of TMTC3 in BC cells and breast epithelial cell MCF-10A, and the result showed that TMTC3 expression was lower in BC cells (MCF-7, MDA-MB-231, MDA-MB-436, SK-BR-3) than that in MCF-10A cells (Figure 1c, p < 0.001).