ABSTRACT
Purpose
To develop transferrin (Tf)-targeted delivery systems for the pro-apoptotic drug, NCL-240, and to evaluate the efficacy of this delivery system in ovarian cancer NCI/ADR-RES cells, grown in vitro in a 3D spheroid model.
Methods
Tf-targeted PEG-PE-based micellar and ePC/CHOL-based liposomal delivery systems for NCL-240 were prepared. NCI/ADR-RES cells were used to generate spheroids by a non-adhesive liquid overlay technique. Spheroid growth and development were monitored by size (diameter) analysis and H&E staining. The targeted formulations were compared to untargeted ones in terms of their degree of spheroid association and penetration. A cell viability analysis with NCL-240-loaded micelles and liposomes was performed to assess the effectiveness of Tf-targeting.
Results
Tf-targeted polymeric micelles and Tf-targeted liposomes loaded with NCL-240 were prepared. NCI/ADR-RES cells generated spheroids that demonstrated the presence of a distinct necrotic core along with proliferating cells in the spheroid periphery, partly mimicking in vivo tumors. The Tf-targeted micelles and liposomes had a deeper spheroid penetration as compared to the untargeted delivery systems. Cell viability studies using the spheroid model demonstrated that Tf-mediated targeting markedly improved the cytotoxicity profile of NCL-240.
Conclusion
Transferrin targeting enhanced delivery and effectiveness of micelles and liposomes loaded with NCL-240 against NCI/ADR-RES cancer cells in a 3D spheroid model.
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Abbreviations
- CHEMS:
-
Cholesterol hemisuccinate
- CHOL:
-
Cholesterol
- DM-PIT-1:
-
N-[(2-hydroxy-5-nitrophenyl)amino]carbonothioyl-3,5-dimethylbenzamide
- DOPE:
-
1,2- dioleoyl-sn-glycero-3-phosphoethanolamine
- ePC:
-
Egg phosphatidylcholine
- EPR:
-
Enhanced permeability and retention
- MDR:
-
Multi-drug resistant
- NCL:
-
National Chemical Laboratory (Pune, India)
- PE:
-
Phosphatidylethanolamine
- PEG:
-
Polyethylene glycol
- PH:
-
Pleckstrin-homology
- PI3K:
-
Phosphatidylinositide 3-kinase
- PIP2 :
-
Phosphatidylinositol-3,4-diphosphate
- PIP3 :
-
Phosphatidylinositol-3,4,5-triphosphate
- PKB/Akt:
-
Protein kinase B
- pNP:
-
p-nitrophenylcarbonyl
- PTEN:
-
Phosphatase and tensin homologous protein
- Tf:
-
Transferrin
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ACKNOWLEDGMENTS AND DISCLOSURES
NIH/NCI grant U54CA151881 to V.T.
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An erratum to this article can be found at http://dx.doi.org/10.1007/s11095-016-2034-x.
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Pattni, B.S., Nagelli, S.G., Aryasomayajula, B. et al. Targeting of Micelles and Liposomes Loaded with the Pro-Apoptotic Drug, NCL-240, into NCI/ADR-RES Cells in a 3D Spheroid Model. Pharm Res 33, 2540–2551 (2016). https://doi.org/10.1007/s11095-016-1978-1
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DOI: https://doi.org/10.1007/s11095-016-1978-1