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Pancreatic ductal adenocarcinoma (PDAC) is one of the most aggressive malignancy and projected to be the third leading cause of cancer related death by 2030. Despite extensive knowledge and insights into biological properties and genetic aberrations of pancreatic ductal adenocarcinoma cells, therapeutic options remain temporary and ineffective. One plausible explanation for the futile response to therapy is an insufficient and nonspecific delivery of anticancer drugs to the tumor site. Superparamagnetic iron oxide nanoparticles (SPION) coupled with siRNA targeted against the cell cycle specific serine-threonine-kinase, Polo-like kinase-1 (siPLK1-StAv-SPIONs) could serve a dual purpose for delivery of siPLK1 to tumor and noninvasive assessment of delivery in vivo. siPLK1-StAv-SPIONs were designed as theranostics to function via a membrane translocation peptide (MPAP-) as well as a tumor selective peptide (EPPT-1) to increase intracellular delivery and tumor specificity, respectively. In vitro and in vivo experiments using a syngenic orthotopic PDAC model as well as the endogenous LSL-KrasG12D,LSL-Trp53R172H,Pdx-1-Cre model revealed significant accumulation of siPLK1-StAv-SPIONs in PDAC resulting in efficient PLK1 silencing. Tumor specific silencing of PLK1 halts tumor growth, marked by decrease in tumor cell proliferation and increase in apoptosis. siPLK1-StAv-SPIONs are well tolerated with no observed systemic side effects. Our data suggests, siPLK1-StAv-SPIONs with dual specificity residues for tumor targeting and membrane translocation, represent an exciting opportunity for targeted therapy in PDAC.