Polymeric Micelles of PEG-PLA Copolymer as a Carrier for Salinomycin Against Gemcitabine-Resistant Pancreatic Cancer
Abstract
Purpose Resistance to gemcitabine in pancreatic cancer (PC) may account for the failure of conventional treatments. Recently, salinomycin (SAL) has been identified as selective inhibitor of cancer stem cells (CSCs). In our study, we aimed to deliver SAL to gemcitabine-resistant PC by the aid of poly ethylene glycol-b-poly lactic acid (PEG-b-PLA) polymeric micelles (PMs).Methods SAL-loaded PMs were prepared and investigated in terms of pharmaceutical properties. MTT and Annexin V/PI assays were used to study cell proliferation and apoptosis in AsPC-1 cells in response to treatment with SAL micellar formulations. Alterations in CSC phenotype, invasion strength, and mRNA expression of epithelial mesenchymal transition (EMT) markers were also determined in the treated cells. In vivo antitumor study was performed in Balb/c AsPC-1 xenograft mice.Results PM formulations of SAL were prepared in suitable size and loading traits. In gemcitabine-resistant AsPC-1 cells, SAL was found to significantly increase cell mortality and apoptosis. It was also observed that SAL micellar formulations inhibited invasion and harnessed EMT in spite of induced expression of Snail. The in vivo antitumor experiment showed significant tumor eradication and the highest survival probability in mice treated with SAL PMs.Conclusions The obtained results showed the efficacy of SAL nano-formulation against PC tumor cells.
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Polyethylene glycol-polylactic acid can self-assemble into micelles with a core/shell structure in aqueous phase.
“Polyethylene glycol-polylactic acid (PEG-PLA), one of the most prominent amphiphilic block copolymers, can self-assemble into micelles with core/shell structure in aqueous phase.38”
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- Authors
- Daman, Z., Montazeri, H., Azizi, M., Rezaie, F., Ostad, S. N., Amini, M., & Gilani, K.
- Affiliations
- Tehran University of Medical Sciences (IR)
- Pasteur Institute of Iran (IR)
- Corresponding author
- Gilani, Kambiz
- Venue
- Pharmaceutical Research
- Published
- 2015-07-31
- Volume
- 32
- Issue
- 11
- Pages
- 3756-3767
- ISSN
- 0724-8741 (ISSN-L)
- 1573-904X
- OpenAlex
- W992516122
- Cited by
- 28
- References
- 40
- Citations by year
- 2025: 3 · 2024: 1 · 2023: 4 · 2022: 3 · 2021: 3 · 2020: 1 · 2019: 4 · 2018: 4 · 2017: 3 · 2016: 2
- FWCI
- 1.08
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Pharmaceutical Research (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Public Health Agency of Canada
- Topics
- Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
- Health Sciences › Medicine › Oncology › Pancreatic and Hepatic Oncology Research
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Advanced Drug Delivery Systems
- Keywords
- salinomycin, polymeric micelles, PEG-b-PLA, gemcitabine resistance, pancreatic cancer, cancer stem cells, epithelial-mesenchymal transition, snails, apoptosis, tumor invasion, drug delivery, AsPC-1 cells, tumor xenografts
- MeSH terms
- Gemcitabine, Polyether Polyketides, Animals, Antineoplastic Agents, Cell Survival, Chromatography, High Pressure Liquid, Deoxycytidine, Drug Carriers, Flow Cytometry, Humans, Mice, Inbred BALB C, Micelles, Pancreatic Neoplasms, Particle Size, Polyethylene Glycols, Pyrans, Solubility, Surface Properties, Apoptosis, Drug Resistance, Neoplasm, Xenograft Model Antitumor Assays, NIH 3T3 Cells, Cell Line, Tumor, Mice, Drug Liberation
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