TGFB1 and neoplasm: In conclusion, by microarray and real time RT-PCR experiments, we show that 1] TGF-β regulates more number of genes in transformed cells as compared to non-transformed cells; 2] evidence for differential regulation of gene expression in normal and tumour cells by TGF-β; and 3] that involvement of MAP kinase pathways may be one of the major mechanisms of TGF-β actions.