To take advantages of single-walled carbon nanotubes (SWNTs) for cellular delivery of chemotherapeutic agents (e.g. doxorubicin) in order to decrease general toxicities of doxorubicin (DOX) and to promote the efficacy, we aimed to develop a novel approach to stabilize SWNTs through consequent steps of oxidation and PEG-g-PEI polyionic complexation (PEG-PEI-SWNT). The DOX loading capacity of modified SWNTs was about 900%. Moreover, it showed an enhanced dispersibility in physiologic-stimulated medium. DOX release was prolonged, independent of dilution, and exhibited an acidic pH-stimulated release. Therefore, PEG-PEI-SWNT could be used for cancer chemotherapy in vivo.
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Farvadi et al. (2016) studied this question.
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