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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Yasui, Hiroshi Podar, Klaus Anderson, Kenneth C. Ishitsuka, Kenji Tonon, Giovanni Kumar, Rakesh Legouill, Steven Pandite, Lini N. Kumar, Shaji Chauhan, Dharminder Hideshima, Teru Sattler, Martin Tai, Yu-tzu |
| Description | Author Affiliation: Podar K ( Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA. klaus.podar@dfci.harvard.edu); |
| Abstract | A critical role for vascular endothelial factor (VEGF) has been demonstrated in multiple myeloma (MM) pathogenesis. Here, we characterized the effect of the small-molecule VEGF receptor inhibitor pazopanib on MM cells in the bone marrow milieu. Pazopanib inhibits VEGF-triggered signaling pathways in both tumor and endothelial cells, thereby blocking in vitro MM cell growth, survival, and migration, and inhibits VEGF-induced up-regulation of adhesion molecules on both endothelial and tumor cells, thereby abrogating endothelial cell-MM cell binding and associated cell proliferation. We show that pazopanib is the first-in-class VEGF receptor inhibitor to inhibit in vivo tumor cell growth associated with increased MM cell apoptosis, decreased angiogenesis, and prolonged survival in a mouse xenograft model of human MM. Low-dose pazopanib demonstrates synergistic cytotoxicity with conventional (melphalan) and novel (bortezomib and immunomodulatory drugs) therapies. Finally, gene expression and signaling network analysis show transcriptional changes of several cancer-related genes, in particular c-Myc. Using siRNA, we confirm the role of c-Myc in VEGF production and secretion, as well as angiogenesis. These preclinical studies provide the rationale for clinical evaluation of pazopanib, alone and in combination with conventional and novel therapies, to increase efficacy, overcome drug resistance, reduce toxicity, and improve patient outcome in MM. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 51 |
| Volume Number | 103 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2006-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Endothelial Cells Drug Effects Gene Expression Regulation, Neoplastic Multiple Myeloma Metabolism Pyrimidines Receptors, Vascular Endothelial Growth Factor Signal Transduction Sulfonamides Animals Apoptosis Blotting, Western Cell Line, Tumor Cell Movement Enzyme-Linked Immunosorbent Assay Immunohistochemistry Immunoprecipitation Mice Microarray Analysis Drug Therapy Neovascularization, Pathologic Proto-Oncogene Proteins C-myc Genetics Pharmacology Therapeutic Use RNA, Small Interfering Reverse Transcriptase Polymerase Chain Reaction Comparative Study Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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