Transforming growth factor-β(TGF-β) is a multifunctional growth factor. It plays a very important role in the growth, dif ferentiation, migration, apoptosis of cells and production of extracellular matr ix throughout many signaling pathways. MAPK cascade is one of those signaling pa thways. TGF-β can activate MAPKs and fulfill its multiple regulation on a varie ty of cells.