Stromal cell-derived factor-1 promotes cell migration and tumor growth of colorectal metastasis

被引:86
作者
Kollmar, Otto [1 ]
Rupertus, Kathrin
Scheuer, Claudia
Junker, Bastian
Tilton, Bettina
Schilling, Martin K.
Menger, Michael D.
机构
[1] Univ Saarland, Dept Gen Visceral Vascular & Pediat Surg, D-66421 Homburg, Germany
[2] Univ Saarland, Inst Clin & Expt Surg, D-66421 Homburg, Germany
来源
NEOPLASIA | 2007年 / 9卷 / 10期
关键词
cancer; metastasis; chemokine; SDF-1; angiogenesis;
D O I
10.1593/neo.07559
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
In a mouse model of established extrahepatic colorectal metastasis, we analyzed whether stromal cell derived factor (SDF) 1 stimulates tumor cell migration in vitro and angiogenesis and tumor growth in vivo. Methods: Using chemotaxis chambers, CT26. WT colorectal tumor cell migration was studied under stimulation with different concentrations of SDF-1. To evaluate angiogenesis and tumor growth in vivo, green fluorescent protein-transfected CT26. WT cells were implanted in dorsal skinfold chambers of syngeneic BALB/ c mice. After 5 days, tumors were locally exposed to SDF-1. Cell proliferation, tumor microvascularization, and growth were studied during a further 9-day period using intravital fluorescence microscopy, histology, and immunohistochemistry. Tumors exposed to PBS only served as controls. Results: In vitro, > 30% of unstimulated CT26. WT cells showed expression of the SDF-1 receptor CXCR4. On chemotaxis assay, SDF-1 provoked a dose-dependent increase in cell migration. In vivo, SDF-1 accelerated neovascularization and induced a significant increase in tumor growth. Capillaries of SDF-1-treated tumors showed significant dilation. Of interest, SDF-1 treatment was associated with a significantly increased expression of proliferating cell nuclear antigen and a downregulation of cleaved caspase-3. Conclusion: Our study indicates that the CXC chemokine SDF-1 promotes tumor cell migration in vitro and tumor growth of established extrahepatic metastasis in vivo due to angiogenesis-dependent induction of tumor cell proliferation and inhibition of apoptotic cell death.
引用
收藏
页码:862 / 870
页数:9
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