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  • Title: EGFR-Targeted Polymeric Mixed Micelles Carrying Gemcitabine for Treating Pancreatic Cancer.
    Author: Mondal G, Kumar V, Shukla SK, Singh PK, Mahato RI.
    Journal: Biomacromolecules; 2016 Jan 11; 17(1):301-13. PubMed ID: 26626700.
    Abstract:
    The objective of this study was to design GE11 peptide (YHWYGYTPQNVI) linked micelles of poly(ethylene glycol)-block-poly(2-methyl-2-carboxyl-propylene carbonate-graft-gemcitabine-graft-dodecanol (PEG-b-PCC-g-GEM-g-DC) for enhanced stability and target specificity of gemcitabine (GEM) to EGFR-positive pancreatic cancer cells. GE11-PEG-PCD/mPEG-b-PCC-g-GEM-g-DC mixed micelles showed EGFR-dependent enhanced cellular uptake, and cytotoxicity as compared to scrambled peptide HW12-PEG-PCD/mPEG-b-PCC-g-GEM-g-DC mixed micelles and unmodified mPEG-b-PCC-g-GEM-g-DC micelles. Importantly, GE11-linked mixed micelles preferentially accumulated in orthotopic pancreatic tumor and tumor vasculature at 24 h post systemic administration. GE11-linked mixed micelles inhibited orthotopic pancreatic tumor growth compared to HW12-linked mixed micelles, unmodified mPEG-b-PCC-g-GEM-g-DC micelles, and free GEM formulations. Tumor growth inhibition was mediated by apoptosis of tumor cells and endothelial cells as determined by immunohistochemical staining. In summary, GE11-linked mixed micelles is a promising approach to treat EGFR overexpressing cancers.
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