Tumorigenicity refers to the ability of cultured cells to develop viable tumors in immune-deficient animals. The goal of this protocol is to illustrate tumorigenicity assay by subcutaneous tumor-cell-transplantation in nude mice. Target cells are transplanted to 6-week-old nude mice subcutaneously and the tumor growth is monitored over a period of observation or treatment. When tumor grows to a pre-determined size or by the end of the limited period, the nude mice will be euthanatized and the xenograft will be removed for further examination. Keywords : Tumorigenicity, Nude mice, Tumor cell transplantation, Tumor xenograft model. With high incidence and mortality, tumor is one of the leading causes of death and is a major public health problem.
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Tumorigenicity Assay in Nude Mice
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A nude mouse is a laboratory mouse from a strain with a genetic mutation that causes a deteriorated or absent thymus , resulting in an inhibited immune system due to a greatly reduced number of T cells. The phenotype main outward appearance of the mouse is a lack of body hair, which gives it the "nude" nickname. The nude mouse is valuable to research because it can receive many different types of tissue and tumor grafts, as it mounts no rejection response. These xenografts are commonly used in research to test new methods of imaging and treating tumors. The genetic basis of the nude mouse mutation is a disruption of the FOXN1 gene.