ALDH1A1 and breast cancer: MiR-129 was often inhibited in breast cancer, and further detection identified the positive correlation between non-coding miR-129 (Relative intensity) and NUMB (Figure 2B), which were both inversely corresponding to higher proportions of either ALDH1 or CD44 (Figure 2B-2F), indicating the potential suppressive roles of either miR-129 or NUMB in stem cells’ renewal.