Abstract
In this study, multiwalled carbon nanotubes (MWCNTs) were used to encapsulate a model anticancer drug, doxorubicin (Dox). Then, the drug-loaded MWCNTs (Dox/MWCNTs) with an optimized drug encapsulation percentage were mixed with poly(lactide-co-glycolide) (PLGA) polymer solution for subsequent electrospinning to form drug-loaded composite nanofibrous mats. The structure, morphology, and mechanical properties of the formed electrospun Dox/PLGA, MWCNTs/PLGA, and Dox/MWCNTs/PLGA composite nanofibrous mats were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy, and tensile testing. In vitro viability assay and SEM morphology observation of mouse fibroblast cells cultured onto the MWCNTs/PLGA fibrous scaffolds demonstrate that the developed MWCNTs/PLGA composite nanofibers are cytocompatible. The incorporation of Dox-loaded MWCNTs within the PLGA nanofibers is able to improve the mechanical durability and maintain the three-dimensional structure of the nanofibrous mats. More importantly, our results indicate that this double-container drug delivery system (both PLGA polymer and MWCNTs are drug carriers) is beneficial to avoid the burst release of the drug and able to release the antitumor drug Dox in a sustained manner for 42 days. The developed composite electrospun nanofibrous drug delivery system may be used as therapeutic scaffold materials for post-operative local chemotherapy.
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This work was financially supported by the “111 Project” (No. B07024), the Fundamental Research Funds for the Central Universities (for R. Guo, M. Shen and X. Shi), and the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning. R. Qi thanks the Program for Innovative Research Team (in Science and Technology) in University of Henan Province (No. 13IRTSTHN024).
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Qi, Rl., Tian, Xj., Guo, R. et al. Controlled release of doxorubicin from electrospun MWCNTs/PLGA hybrid nanofibers. Chin J Polym Sci 34, 1047–1059 (2016). https://doi.org/10.1007/s10118-016-1827-z
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DOI: https://doi.org/10.1007/s10118-016-1827-z