Abstract
Aptamers have the potential to be used as targeting ligands for cancer treatment as they form unique spatial structures. Methods: In this study, a DNA aptamer (T1) that accumulates in the tumor microenvironment was identified through in vivo selection and validation in breast cancer models. The use of T1 as a targeting ligand was evaluated by conjugating the aptamer to liposomal doxorubicin. Results: T1 exhibited a high affinity for both tumor cells and polymorphonuclear myeloid-derived suppressor cells (PMN-MDSCs). Treatment with T1 targeted doxorubicin liposomes triggered apoptosis of breast cancer cells and PMN-MDSCs. Suppression of PMN-MDSCs, which serve an immunosuppressive function, leads to increased intratumoral infiltration of cytotoxic T cells. Conclusion: The cytotoxic and immunomodulatory effects of T1-liposomes resulted in superior therapeutic efficacy compared to treatment with untargeted liposomes, highlighting the promise of T1 as a targeting ligand in cancer therapy.
Original language | English (US) |
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Pages (from-to) | 31-44 |
Number of pages | 14 |
Journal | Theranostics |
Volume | 8 |
Issue number | 1 |
DOIs | |
State | Published - 2018 |
Keywords
- Active targeting
- DNA aptamer
- Liposome
- Myeloid-derived suppressor cells (MDSCs)
- Tumor microenvironment
ASJC Scopus subject areas
- Medicine (miscellaneous)
- Pharmacology, Toxicology and Pharmaceutics (miscellaneous)