MUC1 and neoplasm: Importantly, tumour xenografts, spontaneous and experimental lung metastatic lesions developed by subcutaneous inoculation (s.c.)or intravenous injection (i.v.)of A549-miR-128-3p cells, respectively, as well as their metastatic lesions in multiple organs, were positive for MUC1 staining, while tumour xenografts and lung metastatic lesions of H520-miR-128-3p cells were also positive for CK5 staining, suggesting that these metastatic lesions are of epithelial origin from the corresponding inoculated NSCLC cells (Fig. 3f and Supplementary Fig. 6b).