Lee M.J.,Medical Research Center for Ischemic Tissue Regeneration and Medical Research Institute |
Lee M.J.,Pusan National University |
Heo S.C.,Medical Research Center for Ischemic Tissue Regeneration and Medical Research Institute |
Heo S.C.,Pusan National University |
And 10 more authors.
International Journal of Biochemistry and Cell Biology | Year: 2013
Oncostatin M, a member of the interleukin-6 family of cytokines, has been implicated in tumorigenesis of human prostate cancer. In the current study, we demonstrate that oncostatin M promotes human adipose tissue-derived mesenchymal stem cell-stimulated tumor growth in an in vivo xenograft trans-plantation model of the human prostate cancer cell line PC-3M-luc-C6, a PC3M cell line expressing the luciferase gene. Conditioned medium derived from oncostatin M-treated mesenchymal stem cells stim-ulated adhesion of PC-3M-luc-C6 cells. We identified TGFBI and periostin, extracellular matrix proteins implicated in tumorigenesis and metastasis, as oncostatin M-induced secreted proteins in mesenchymalstem cells. Treatment with oncostatin M stimulated secretion of periostin and TGFBI from mesenchy-mal stem cells in a time-dependent manner. Immunodepletion of TGFBI and periostin from conditioned medium derived from oncostatin M-treated mesenchymal stem cells resulted in abrogation of adhesion of PC-3M-luc-C6 cells stimulated by oncostatin M-conditioned medium. In addition, small interfering RNA-mediated silencing of TGFBI and periostin resulted in abrogation of cell adhesion stimulated by oncostatin M-conditioned medium. These results suggest that mesenchymal stem cell-derived TGFBI and periostin play a key role in tumorigenesis by stimulating adhesion of prostate cancer cells. © 2013 Elsevier Ltd. All rights reserved.