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 activity. Taken together, these results suggest that the BMP-2 acts through PI3K/Akt, which in turn activates IKKalpha/beta and NF-kappaB, resulting in the activations of beta1 integrin and contributing the migration of human chondrosarcoma cells.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Fong YC,Li TM,Wu CM,Hsu SF,Kao ST,Chen RJ,Lin CC,Liu SC,Wu CL,Tang CHdoi
10.1002/jcp.21568subject
Has Abstractpub_date
2008-12-01 00:00:00pages
846-55issue
3eissn
0021-9541issn
1097-4652journal_volume
217pub_type
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