Doxorubicin loaded polymeric nanoparticulate delivery system to overcome drug resistance in osteosarcoma

Title:
Doxorubicin loaded polymeric nanoparticulate delivery system to overcome drug resistance in osteosarcoma
Creator:
Susa, Michiro (Author)
Iyer, Arun K. (Author)
Ryu, Keinosuke (Author)
Hornicek, Francis John (Author)
Mankin, Henry J. (Author)
Amiji, Mansoor M. (Author)
Duan, Zhenfeng (Author)
Language:
English
Publisher:
BioMed Central
Copyright date:
2009
Type of resource:
Text
Genre:
Articles
Format:
electronic
Digital origin:
born digital
Abstract/Description:
Background: Drug resistance is a primary hindrance for the efficiency of chemotherapy against osteosarcoma. Although chemotherapy has improved the prognosis of osteosarcoma patients dramatically after introduction of neo-adjuvant therapy in the early 1980's, the outcome has since reached plateau at approximately 70% for 5 year survival. The remaining 30% of the patients eventually develop resistance to multiple types of chemotherapy. In order to overcome both the dose-limiting side effects of conventional chemotherapeutic agents and the therapeutic failure incurred from multidrug resistant (MDR) tumor cells, we explored the possibility of loading doxorubicin onto biocompatible, lipid-modified dextran-based polymeric nanoparticles and evaluated the efficacy.
Methods: Doxorubicin was loaded onto a lipid-modified dextran based polymeric nano-system. The effect of various concentrations of doxorubicin alone or nanoparticle loaded doxorubicin on KHOS, KHOSR2, U-2OS, and U-2OSR2 cells was analyzed. Effects on drug retention, immunofluorescence, Pgp expression, and induction of apoptosis were also analyzed.
Results: Dextran nanoparticles loaded with doxorubicin had a curative effect on multidrug resistant osteosarcoma cell lines by increasing the amount of drug accumulation in the nucleus via Pgp independent pathway. Nanoparticles loaded with doxorubicin also showed increased apoptosis in osteosarcoma cells as compared with doxorubicin alone.
Conclusion: Lipid-modified dextran nanoparticles loaded with doxorubicin showed pronounced anti-proliferative effects against osteosarcoma cell lines. These findings may lead to new treatment options for MDR osteosarcoma.
Comments:
Originally published in BMC Cancer 2009, 9:399. doi:10.1186/1471-2407-9-399
Subjects and keywords:
Doxorubicin
Osteosarcoma
Drug resistance in cancer cells
Drug delivery systems
drug resistance
osteosarcoma
bone cancer
polymeric nanoparticles
doxorubicin
Oncology
Pharmaceutics and Drug Design
Permanent Link:
http://hdl.handle.net/2047/d20000293

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