Abstract

Two thirds of metastatic osteosarcoma patients die within 5 years of diagnosis. Improved experimental models of osteosarcoma metastasis will facilitate the development of more effective therapies. Intravenous cancer cell injection can produce lung metastases in nude mice, but this "experimental metastasis" technique has been predominantly applied to a single osteosarcoma cell line (143B) and required injection of 1-2 million cells. Using two human osteosarcoma cell lines, we discovered that transient Natural Killer cell depletion dramatically enhanced the efficiency of experimental pulmonary osteosarcoma metastasis. This technique for modeling osteosarcoma metastasis may enable the identification of better treatments for this aggressive cancer.

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