Abstract
Effective postoperative therapy is crucial for preventing tumor recurrence and metastasis. Nanocomposite (NC) pastes of Gel/CS-g-CD NP with unique viscoelastic properties and pH-responsive drug delivery ability were prepared from gelatin (Gel) and β-cyclodextrin-grafted chitosan nanoparticles (CS-g-CD NPs) through host–guest interactions between the aromatic amino acid residues of gelatin and β-cyclodextrin. The dynamic rheological properties, shear strength, and shear viscosity were modulated through variations in the concentration of CS-g-CD NPs in the NC pastes. Due to the reversibility of the host–guest interactions, the NC pastes exhibited shear-thinning and self-healing properties, endowing them with good injectability. Loading of doxorubicin (DOX) in the nanoparticles (DOX-CSCD NPs) forming the NC pastes of Gel/DOX-CSCD NP allowed pH-triggered DOX release in a simulated tumoral microenvironment, because of the labile nature of the CS-g-CD NPs under acidic conditions. In vitro experiments showed that the NC pastes of Gel/DOX-CSCD NP induced sustained tumor cell inhibition. Moreover, in vivo studies with tumor-bearing mice indicated that the NC pastes of Gel/DOX-CSCD NP can effectively inhibit tumor recurrence after surgical resection. Therefore, the NC pastes described in this work may act as an effective injectable drug delivery system for postoperative tumoral treatment.
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Funding
This work was supported by the National Natural Science Foundation of China (Nos. 52173151, 51803067, 51973076), Hubei Provincial Natural Science Foundation (2020CFB491), Science Research Program of the Education Department of Hubei Province (Q20203002), and the open foundation of Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics (Wuhan University of Technology) (No.: TAM202006).
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Lin Xiao, Guang Yang, and Lixia Huang designed the work and provided funding support. Lin Xiao, Lixia Huang, and Weichang Xu conducted the investigation, analysis, and validation. Lin Xiao and Lixia Huang prepared the original draft manuscript. Jili Liu participated in the data analysis and edited the manuscript. Guang Yang directed the investigation and edited the manuscript. All authors reviewed the manuscript.
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Xiao, L., Xu, W., Huang, L. et al. Nanocomposite pastes of gelatin and cyclodextrin-grafted chitosan nanoparticles as potential postoperative tumor therapy. Adv Compos Hybrid Mater 6, 15 (2023). https://doi.org/10.1007/s42114-022-00575-3
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DOI: https://doi.org/10.1007/s42114-022-00575-3