Abstract
Brain metastasis is a highly complex process, and some cancer cells enter a dormant state after extravasation into the brain. The molecular mechanism of dormancy remains largely unknown and is still under intense investigation. Here, we outline a basic approach to generating and analyzing experimental mouse models to study dormant cancer cells in the brain. Cancer cells stably expressing EGFP and firefly luciferase are injected into the left ventricle of athymic nude mice. After confirmation of brain metastasis by bioluminescence imaging, brain slices are prepared and subjected to Ki67 staining. In addition, a methodology for recovering brain metastatic cancer cells from the mouse brain is described, providing technical tips for unraveling the mysteries of cancer cell dormancy in brain metastasis.
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