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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Pratap, Jitesh Lian, Jane B. Barnes, George L. Gerstenfeld, Louis C. Stein, Janet L. Javed, Amjad Van Wijnen, Andre J. Stein, Gary S. Antkowiak, Tomasz |
| Description | Author Affiliation: Javed A ( Department of Cell Biology and Cancer Center, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA 01655, USA.); |
| Abstract | Runx transcription factors comprise a family of proteins that are essential for organogenesis. A unique nuclear matrix-targeting signal in the C terminus directs these factors to their appropriate subnuclear domains. At these sites, they interact with coregulatory proteins and target genes. We have previously shown that aberrant expression of the Runx2 DNA binding domain in metastatic breast cancer cells can prevent production of osteolytic lesions in bone. Here, we show that proper Runx2 subnuclear targeting is required for osteolysis. We have identified point mutations of the Runx2 nuclear matrix-targeting signal sequence that impair its targeting to nuclear matrix sites. These mutations block the invasive and osteolytic properties of MDA-MB-231 breast cancer cells in vivo. Cell lines expressing this Runx2 mutant protein inhibit the osteogenic properties of bone marrow stromal cells in coculture assays. The mutant breast cancer cells also exhibit reduced invasiveness in vitro and do not express genes involved in invasion and angiogenesis (VEGF and MMP13). Our findings suggest that fidelity of Runx2 intranuclear organization is necessary for expression of target genes that mediate the osteolytic activity of metastatic breast cancer cells. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 5 |
| Volume Number | 102 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2005-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Breast Neoplasms Genetics Pathology Neoplasm Proteins Metabolism Osteolysis Prevention & Control Transcription Factors Active Transport, Cell Nucleus Binding Sites Bone Neoplasms Cell Line, Tumor Cell Nucleus Physiology Collagenases Core Binding Factor Alpha 1 Subunit Core Binding Factor Alpha Subunits DNA Primers DNA, Neoplasm Gene Expression Regulation, Neoplastic HeLa Cells Matrix Metalloproteinase 13 Neoplasm Metastasis Osteogenesis Polymerase Chain Reaction Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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