owever, when NG2+ cells were removed from m-BMMSCs by magnetic activated cell sorting [MACS, m-NG2(-)/BMMSCs] [37], no improvements in biliary repair were detected; these effects were represented by CK7 (Fig. 4Ea, boxes, b, p = 0.931) or CK19 (Fig. 4Fa, boxes, b, p = 0.386) expression, comparable to DEN mice, and the mRNA levels were similar (CK7: Fig. 4Ec, p = 0.349; CK19: Fig. 4Fc, p = 0.375), suggesting that NG2+ cells play a core role in the function of BMMSCs in BDC-mediated regulation. The gene discussed is KRT19; the disease is collecting duct carcinoma.