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Learn MoreClonal evolution drives tumor progression, dissemination and relapse in cancer, and dissemination or metastasis of the tumor cells from primary site to other organs is the leading cause of death for cancer patients. This multi-stage process requires tumor cells to survive in the circulation, extravasate at distant sites, then colonization. The whole process involves contributions from both the tumor cells and microenvironment. Here we developed and applied a clonal tracking rainbow system into a tumor dissemination xenograft mouse model (SCID-mu) to study the clonal behaviors with the presence of a bone marrow environment showing that only a few subclones successfully remodeled by BM environment can exit the primary site and further colonize in distant tissues. RNA-sequencing results of primary and disseminated MM tumor cells revealed a metastatic signature, which is sequentially activated during human MM progression and significantly associated with overall survival when evaluated against a public patient dataset suggesting SCID-mu model characterizes MM dissemination phenotypically and mechanistically. SOURCE: Jiantao Shi (jshi@hsph.harvard.edu) - Michor lab dana farber cancer institute
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