|
|
||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Original Article |
1 Tulane University, New Orleans, Louisiana
* To whom correspondence should be addressed. E-mail: cgregory{at}tulane.edu.
| Abstract |
|---|
Multiple myeloma (MM) is a malignancy of antibody-secreting plasma cells. B cell plasmacytomas stimulate bone resorption and angiogenesis, resulting in osteolytic lesions in the skeleton that persist upon successful treatment of the malignancy with chemotherapy. We found that an interaction between MM cells and mesenchymal stem cells (MSCs) from bone marrow stroma results in the formation and persistence of osteolytic bone lesions. It is known that MM cells activate osteoclast activity and secrete high levels of the Wnt inhibitor, Dickkopf-1, which prevents MSCs from differentiating into osteoblasts. We show that the Wnt signaling activator 6-bromoindirubin-3'-monoxime (BIO), releases MSCs from the osteoinhibitory effects of Dickkopf-1, whereas LiCl treatment does not. Additionally, we show that the >5 kDa fraction of MSCconditioned medium promotes the proliferation of Dickkopf-1-secreting MM cells, and that an IL6-neutralizing antibody blocks this effect. IL6 gene expression levels were higher in undifferentiated MSCs than in MSCs treated with osteogenic medium, remained high in the presence of Dkk1, and were reduced by BIO treatment. Therefore, BIO treatment reduces the MSC-stimulated proliferation of MM cells and may enable MSCs to repair existing osteolytic lesions.
Key Words. multiple myeloma, mesenchymal stem cell, osteolytic lesions, chemotherapy, Wnt signaling, 6-bromoindirubin-3'-monoxime, interleukin-6
This article has been cited by other articles:
![]() |
H. Ohtaki, J. H. Ylostalo, J. E. Foraker, A. P. Robinson, R. L. Reger, S. Shioda, and D. J. Prockop Stem/progenitor cells from bone marrow decrease neuronal death in global ischemia by modulation of inflammatory/immune responses PNAS, September 23, 2008; 105(38): 14638 - 14643. [Abstract] [Full Text] [PDF] |
||||
![]() |
Y.-W. Qiang, J. D. Shaughnessy Jr, and S. Yaccoby Wnt3a signaling within bone inhibits multiple myeloma bone disease and tumor growth Blood, July 15, 2008; 112(2): 374 - 382. [Abstract] [Full Text] [PDF] |
||||
![]() |
Y.-W. Qiang, Y. Chen, O. Stephens, N. Brown, B. Chen, J. Epstein, B. Barlogie, and J. D. Shaughnessy Jr Myeloma-derived Dickkopf-1 disrupts Wnt-regulated osteoprotegerin and RANKL production by osteoblasts: a potential mechanism underlying osteolytic bone lesions in multiple myeloma Blood, July 1, 2008; 112(1): 196 - 207. [Abstract] [Full Text] [PDF] |
||||
![]() |
X. Li, A. Pennisi, and S. Yaccoby Role of decorin in the antimyeloma effects of osteoblasts Blood, July 1, 2008; 112(1): 159 - 168. [Abstract] [Full Text] [PDF] |
||||
![]() |
G. Lazennec and C. Jorgensen Concise Review: Adult Multipotent Stromal Cells and Cancer: Risk or Benefit? Stem Cells, June 1, 2008; 26(6): 1387 - 1394. [Abstract] [Full Text] [PDF] |
||||
![]() |
L. Raffaghello, G. Bianchi, M. Bertolotto, F. Montecucco, A. Busca, F. Dallegri, L. Ottonello, and V. Pistoia Human Mesenchymal Stem Cells Inhibit Neutrophil Apoptosis: A Model for Neutrophil Preservation in the Bone Marrow Niche Stem Cells, January 1, 2008; 26(1): 151 - 162. [Abstract] [Full Text] [PDF] |
||||
![]() |
N. Giuliani, F. Morandi, S. Tagliaferri, M. Lazzaretti, G. Donofrio, S. Bonomini, R. Sala, M. Mangoni, and V. Rizzoli Production of Wnt Inhibitors by Myeloma Cells: Potential Effects on Canonical Wnt Pathway in the Bone Microenvironment Cancer Res., August 15, 2007; 67(16): 7665 - 7674. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Magnusson, A. C. M. Brun, N. Miyake, J. Larsson, M. Ehinger, J. M. Bjornsson, A. Wutz, M. Sigvardsson, and S. Karlsson HOXA10 is a critical regulator for hematopoietic stem cells and erythroid/megakaryocyte development Blood, May 1, 2007; 109(9): 3687 - 3696. [Abstract] [Full Text] [PDF] |
||||
![]() |
J. D. Shaughnessy Jr. Going Against the Grain: Promoting Wnt Signaling to Conquer Cancer Am. Assoc. Cancer Res. Educ. Book, April 14, 2007; 2007(1): 19 - 24. [Full Text] [PDF] |
||||
![]() |
N. Giuliani, V. Rizzoli, and G. D. Roodman Multiple myeloma bone disease: pathophysiology of osteoblast inhibition Blood, December 15, 2006; 108(13): 3992 - 3996. [Abstract] [Full Text] [PDF] |
||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH |
| STEM CELLS | THE ONCOLOGIST | CME | ALPHAMED PRESS JOURNALS |
