In addition, we found that tumor cells expressed higher levels of BMP2, N-cadherin, Vimentin and p-SMAD1/5 in the shLacZ group than in the shBMP2 group by IHC both in primary tumors (right lung) and metastatic tumors (left lung) (Fig. 6F and supplementary Fig. 7A,B). Here, SMAD1 is linked to neoplasm.