Research Papers:

Tumor penetrating nanomedicine targeting both an oncomiR and an oncogene in pancreatic cancer

Maud-Emmanuelle Gilles, Liangliang Hao, Kaelyn Brown, Jihoon Lim, Sangeeta N. Bhatia and Frank J. Slack _

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Oncotarget. 2019; 10:5349-5358. https://doi.org/10.18632/oncotarget.27160

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Maud-Emmanuelle Gilles1, Liangliang Hao2,3, Kaelyn Brown1, Jihoon Lim1, Sangeeta N. Bhatia2,3,4,5,6,7 and Frank J. Slack1

1 HMS Initiative for RNA Medicine, Department of Pathology, Cancer Center, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA

2 Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

3 Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

4 Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA

5 Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, Massachusetts, USA

6 Howard Hughes Medical Institute, Cambridge, Massachusetts, USA

7 Marble Center for Cancer Nanomedicine, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

Correspondence to:

Frank J. Slack,email: fslack@bidmc.harvard.edu

Keywords: miRNAs; KRAS; RNA-based-therapy; PDAC; tumor-penetrating nanocomplexes

Received: March 28, 2019     Accepted: July 28, 2019     Published: September 03, 2019


Developing new targeted therapy for pancreatic cancer is one of the major current challenges in cancer research. KRAS mutations and miRNA dysregulation (e.g. miR-21-5p oncomiR) play key roles in Pancreatic Ductal Adenocarcinoma (PDAC), leading to rapid progression of the disease. As the KRAS mutation is a main driver of PDAC, anti-KRAS strategies remain a major therapeutic approach for PDAC treatment. Previously, utilization of either siKRAS or small chemically modified single-stranded RNA molecules that specifically disable miR-21 (anti-miR-21) were effective in slowing PDAC tumor growth in various tumor models when packaged in an innovative delivery system (TPN) required for efficient drug delivery to the PDAC tumor site. Here we have tested the utility of targeting the KRAS pathway through multiple mechanisms and via dual targeting of a PDAC oncomiR and oncogene. Initially we found that miR-217, which has been shown to directly regulate KRAS expression, is downregulated in our PDAC samples, thus we tested the benefits of anti-miR-21, miR-217 mimic or siKRAS loaded into the tumor-penetrating nanoparticles (TPN) that we had previously shown to potently target the largely impenetrable PDAC tumors, and found an enhanced anti-tumoral response upon dual treatments in KRAS-mutated PDAC models.

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