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Blood, 1 March 2006, Vol. 107, No. 5, pp. 1761-1767.
Prepublished online as a Blood First Edition Paper on November 3, 2005; DOI 10.1182/blood-2005-08-3182.
Previous Article | Next Article 
Submitted August 8, 2005
Accepted October 24, 2005
CXCR4: A key receptor in the cross talk between tumor cells and their microenvironment
Jan A Burger* and Thomas J Kipps
Department of Leukemia, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
Department of Medicine, Division of Hematology/Oncology, University of California, San Diego, San Diego, California, USA
* Corresponding author; email: jaburger{at}mdanderson.org.
Signals from the microenvironment have a profound influence on the maintenance and/or progression of hematopoietic and epithelial cancers. Mesenchymal or marrow-derived stromal cells, which constitute a large proportion of the non-neoplastic cells within the tumor microenvironment, constitutively secrete the chemokine stromal cell-derived factor-1 (SDF-1/CXCL12). CXCL12 secretion by stromal cells attracts cancer cells, acting through its cognate receptor, CXCR4, which is expressed by both hematopoietic and non-hematopoietic tumor cells. CXCR4 promotes tumor progression by direct and indirect mechanisms. First, CXCR4 is essential for metastatic spread to organs where CXCL12 is expressed, and thereby allows tumor cells to access cellular niches, such as the marrow, that favor tumor-cell survival and growth. Second, stromal-derived CXCL12 itself can stimulate survival and growth of neoplastic cells in a paracrine fashion. Third, CXCL12 can promote tumor angiogenesis by attracting endothelial cells to the tumor microenvironment. CXCR4 expression is a prognostic marker in various types of cancer, such as acute myelogenous leukemia or breast carcinoma. Promising results in pre-clinical tumor models indicate that CXCR4 antagonists may have anti-tumor activity in patients with various malignancies. Collectively, these observations reveal that CXCR4 is an important molecule involved in the spread and progression of a variety of different tumors. As such, CXCR4 antagonists, although initially developed for treatment of AIDS, actually may become effective agents for the treatment of neoplastic disease.

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N. Moskovits, A. Kalinkovich, J. Bar, T. Lapidot, and M. Oren
p53 Attenuates Cancer Cell Migration and Invasion through Repression of SDF-1/CXCL12 Expression in Stromal Fibroblasts.
Cancer Res.,
November 15, 2006;
66(22):
10671 - 10676.
[Abstract]
[Full Text]
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A. Kalinkovich, S. Tavor, A. Avigdor, J. Kahn, A. Brill, I. Petit, P. Goichberg, M. Tesio, N. Netzer, E. Naparstek, et al.
Functional CXCR4-Expressing Microparticles and SDF-1 Correlate with Circulating Acute Myelogenous Leukemia Cells.
Cancer Res.,
November 15, 2006;
66(22):
11013 - 11020.
[Abstract]
[Full Text]
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O. Salvucci, M. de la Luz Sierra, J. A. Martina, P. J. McCormick, and G. Tosato
EphB2 and EphB4 receptors forward signaling promotes SDF-1-induced endothelial cell chemotaxis and branching remodeling
Blood,
November 1, 2006;
108(9):
2914 - 2922.
[Abstract]
[Full Text]
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C. Luo, H. Pan, M. Mines, K. Watson, J. Zhang, and G.-H. Fan
CXCL12 Induces Tyrosine Phosphorylation of Cortactin, Which Plays a Role in CXC Chemokine Receptor 4-mediated Extracellular Signal-regulated Kinase Activation and Chemotaxis
J. Biol. Chem.,
October 6, 2006;
281(40):
30081 - 30093.
[Abstract]
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F. Dommange, G. Cartron, C. Espanel, N. Gallay, J. Domenech, L. Benboubker, M. Ohresser, P. Colombat, C. Binet, H. Watier, et al.
CXCL12 polymorphism and malignant cell dissemination/tissue infiltration in acute myeloid leukemia
FASEB J,
September 1, 2006;
20(11):
1913 - 1915.
[Abstract]
[Full Text]
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S. Brule, N. Charnaux, A. Sutton, D. Ledoux, T. Chaigneau, L. Saffar, and L. Gattegno
The shedding of syndecan-4 and syndecan-1 from HeLa cells and human primary macrophages is accelerated by SDF-1/CXCL12 and mediated by the matrix metalloproteinase-9
Glycobiology,
June 1, 2006;
16(6):
488 - 501.
[Abstract]
[Full Text]
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J. Vakkila, R. Jaffe, M. Michelow, and M. T. Lotze
Pediatric cancers are infiltrated predominantly by macrophages and contain a paucity of dendritic cells: a major nosologic difference with adult tumors.
Clin. Cancer Res.,
April 1, 2006;
12(7):
2049 - 2054.
[Abstract]
[Full Text]
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