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Learn MoreWe identified miR-21 and miR-224 as cell-specific and compartment-specific regulators in PanINs and PDA. miR-21 is overexpressed in tumor epithelial cells of premalignant ducts, while miR-224 is overexpressed in cancer-associated fibroblasts in PDA stroma. Inhibition of miR-21 reverted pro-tumorigenic functionalities to baseline levels. Overexpression of miR-224 induced activated phenotypes in normal fibroblasts. miR-21 inhibition downregulated MAPK, mTOR and actin cytoskeleton pathways downstream of KRAS activation in tumor cells. In vivo miR-21 inhibition improved survival in established PDA, while early systemic miR-21 inhibition intercepted premalignant progression. SOURCE: Jacquelyn,W,Zimmerman (jzimme27@jhmi.edu, jackiezimm133@gmail.com) - Johns Hopkins Sidney Kimmel Comp. Cancer Center
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