Abstract
Herein, cisplatin-loaded poly(L-glutamic acid)-g-methoxy poly(ethylene glycol) nanoparticles were evaluated as a potential chemotherapeutic agent against osteosarcoma by using alone or with an iRGD (internalizing RGD, CRGDKDPDC). The release rate of platinum from the cisplatin-loaded nanoparticles CDDP/PLG160-g-mPEG2K (CDDP-NPs) accelerated with the increase of the acidity of the environment. In vitro test demonstrated that CDDP-NPs could inhibit the proliferation of MNNG/Hos osteosarcoma cells with IC50 (72 h) of 12.2 μg·mL−1. In vivo test for MNNG/Hos osteosarcoma tumor bearing mice exhibited that CDDP-NPs had comparable or slightly higher efficacy but significantly lower side effects in comparison with free CDDP. The coadministration of iRGD could further enhance the anticancer efficacy of CDDP-NPs against MNNG/Hos osteosarcoma without bringing obvious side effects. Therefore, CDDP-NPs using alone or with iRGD have great potential for the treatment of osteosarcoma.
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This work was financially supported by the National Natural Science Foundation of China (Nos. 51373168, 51233004, 21104076, 51321062 and 51390484), Ministry of Science and Technology of China (International Cooperation and Communication Program 2011DFR51090) and the Program of Scientific Development of Jilin Province (Nos. 20130206066GX, 20130727050YY and 20130521011JH).
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Li, Yf., Yu, Hy., Sun, H. et al. Cisplatin-loaded poly(L-glutamic acid)-g-methoxy poly(ethylene glycol) nanoparticles as a potential chemotherapeutic agent against osteosarcoma. Chin J Polym Sci 33, 763–771 (2015). https://doi.org/10.1007/s10118-015-1624-0
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DOI: https://doi.org/10.1007/s10118-015-1624-0