The Vk*MYC Mouse Model recapitulates human multiple myeloma evolution and genomic diversity
MAURA, F.; Coffey, D. G.; Stein, C. K.; Braggio, E.; Ziccheddu, B.; Sharik, M. E.; Du, M.; Alvarado, Y. T.; Shi, C.-X.; Zhu, Y. X.; Meermeier, E. W.; Morgan, G. J.; Landgren, O.; Bersagel, L.; Chesi, M.
Show abstract
Despite advancements in profiling multiple myeloma (MM) and its precursor conditions, there is limited information on mechanisms underlying disease progression. Clincal efforts designed to deconvolute such mechanisms are challenged by the long lead time between monoclonal gammopathy and its transformation to MM. MM mouse models represent an opportunity to overcome this temporal limitation. Here, we profile the genomic landscape of 118 genetically engineered Vk*MYC MM and reveal that it recapitulates the genomic heterogenenity and life history of human MM. We observed recurrent copy number alterations, structural variations, chromothripsis, driver mutations, APOBEC mutational activity, and a progressive decrease in immunoglobulin transcription that inversely correlates with proliferation. Moreover, we identified frequent insertional mutagenesis by endogenous retro-elements as a murine specific mechanism to activate NF-kB and IL6 signaling pathways shared with human MM. Despite the increased genomic complexity associated with progression, advanced tumors remain dependent on MYC expression, that drives the progression of monoclonal gammopathy to MM.
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