Pancreatic ductal adenocarcinoma (PDAC) is one of the most metastatic and deadly cancers. Despite the clinical significance of metastatic spread, our understanding of molecular mechanisms that drive PDAC metastatic ability remains limited. Using a novel genetically engineered mouse model of human PDAC, we uncover a transient subpopulation of cancer cells with exceptionally high metastatic ability. Global gene expression profiling and functional analyses uncovered the transcription factor Blimp1 as a key driver of PDAC metastasis. The highly metastatic PDAC subpopulation is enriched for hypoxia-induced genes and hypoxia-mediated induction of Blimp1 contributes to the regulation of a subset of hypoxia-associated gene expression programs. These findings support a model in which up-regulation of Blimp1 links microenvironmental cues to a metastatic stem cell character.
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