SLC31A2 and cancer: Furthermore, we found that in addition to inducing expression of ABCG2, a cancer stemness marker and multi-drug transporter as aforementioned, miR-128 also upregulated expression of another drug transporter CTR2 (Supplementary Fig. 3g), silencing of which has been extensively reported to promote uptake of platinum-based drugs and cisplatin-induced cellular apoptosis16, 17.