Intriguingly, Tang et al. discovered a positive feedback loop that facilitated TGF-β autocrine in breast cancer, where TGF-β1 could activate DNMT3B and thus suppressed the expression of miR-200a, miR-200b, miR-200c and miR-141, leading to enhanced sensitivity of CAFs to TGF-β1 [137]. The gene discussed is TGFB1; the disease is breast carcinoma.