کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4304858 1612532 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dual-Color Imaging of Angiogenesis and Its Inhibition in Bone and Soft Tissue Sarcoma
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی عمل جراحی
پیش نمایش صفحه اول مقاله
Dual-Color Imaging of Angiogenesis and Its Inhibition in Bone and Soft Tissue Sarcoma
چکیده انگلیسی

BackgroundAngiogenesis is a critical step in tumor growth, progression, and metastasis. Soft tissue and bone sarcoma are resistant to most therapeutic approaches. Angiogenesis of these tumors may be an effective target. We hypothesized that we could inhibit tumor growth by targeting angiogenesis in a mouse model of sarcoma. We demonstrate in this report, using powerful color-coded fluorescent imageable tumor-host models, the onset of angiogenesis of these sarcomas and its inhibition.Materials and methodsTransgenic mice were used as the host in which green fluorescent protein (GFP) is driven by a regulatory element of the stem cell marker nestin (ND-GFP). Nascent blood vessels express ND-GFP in this model. We visualized, by dual-color fluorescence imaging, angiogenesis of sarcoma formed by the HT-1080 human fibrosarcoma cell line expressing red fluorescent protein (RFP) in the ND-GFP mice. Tumor cells were injected into either the muscle or the bone.ResultsNestin was highly expressed in proliferating endothelial cells and nascent blood vessels in the growing tumors, including the surrounding tissues. Immunohistochemical staining showed that CD31 colocalized in ND-GFP-expressing nascent blood vessels. The density of nascent blood vessels in the tumor was readily quantitated. The mice were given daily i.p. injections of 5 mg/kg of doxorubicin after implantation of tumor cells. Doxorubicin significantly decreased the mean nascent blood vessel density in the tumors as well as decreased tumor volume.ConclusionThe dual-color model of the ND-GFP nude mouse and RFP sarcoma cells is useful for the visualization and quantitation of bone and soft tissue tumor angiogenesis and evaluation of angiogenic inhibitors for such tumors. These data suggest targeting angiogenesis of sarcomas as a promising clinical approach.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Surgical Research - Volume 140, Issue 2, 15 June 2007, Pages 165–170
نویسندگان
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