BMP-2 increases migration of human chondrosarcoma cells via PI3K/Akt pathway

Journal of Cellular Physiology
Yi-Chin FongChih-Hsin Tang

Abstract

Bone morphogenetic protein-2 (BMP-2), a member of transforming growth factor-beta superfamily, plays a crucial role in migration and metastasis of human cancer cells. Integrins are the major adhesive molecules in mammalian cells. Here we found that BMP-2 directed the migration and increased cell surface and mRNA expression of beta1 integrin in human chondrosarcoma cancer cells (JJ012). Pretreated of JJ012 cells with phosphatidylinositol 3-kinase inhibitor (PI3K; Ly294002) or Akt inhibitor inhibited the BMP-2-mediated migration and integrin expression. BMP-2 increased the phosphorylation of p85 subunit of PI3K and serine 473 of Akt. In addition, NF-kappaB inhibitor (PDTC) or IkappaB protease inhibitor (TPCK) also inhibited BMP-2-mediated cells migration and integrin upregulation. Stimulation of JJ012 cells with BMP-2 induced IkappaB kinase (IKKalpha/beta) phosphorylation, IkappaB phosphorylation, p65 Ser(536) phosphorylation, and kappaB-luciferase activity. Furthermore, the BMP-2-mediated increasing of IKKalpha/beta phosphorylation, IkappaB phosphorylation, and p65 Ser(536) phosphorylation were inhibited by Ly294002 and Akt inhibitor. Co-transfection with p85 and Akt mutants also reduced the BMP-2-induced kappaB-luciferase activ...Continue Reading

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