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Lipid- and TPGS-Based Core–Shell-Type Nanocapsules Endowed with High Paclitaxel Loading and Enhanced Anticancer Potential

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Abstract

The current study elucidates the improved drug loading of paclitaxel (PTX) in lipid- and d-α-tocopheryl polyethylene glycol succinate (TPGS)–based core–shell-type lipid nanocapsules (PTX-TPGS-LNC) for augmenting the therapeutic efficacy and curbing the toxicity. PTX-TPGS-LNCs were formulated by employing anti-solvent precipitation technique and displayed a particle size of 162.1 ± 4.70 nm and % practical drug loading of 15.04 ± 2.44%. Electron microscopy revealed that PTX-TPGS-LNCs have spherical morphology and the inner core was surrounded by a relatively lighter region, i.e., layer of lipids and TPGS. The nature of loaded PTX inside the PTX-TPGS-LNC was also confirmed using DSC and PXRD analysis. The in vitro release study showed biphasic and sustained release pattern of PTX from PTX-TPGS-LNC and it showed ~ threefold higher PTX uptake in MCF-7 cell line in comparison to free PTX. Moreover, it was apparent from the cytotoxicity assay that PTX-TPGS-LNC displayed higher cytotoxicity in MCF-7 cells and revealed ~ 2.92-fold decrease in IC50 value as against free PTX when incubated for 72 h. The apoptotic index in case of PTX-TPGS-LNC was ~ twofold higher than free PTX. The pharmacokinetic profile of PTX-TPGS-LNC revealed a ~ 3.18-fold increase in t1/2 and a ~ 2.62-fold higher AUC(0→∞) compared to Intaxel®. Finally, treatment with PTX-TPGS-LNC demonstrated significant lowering in the % tumor burden and serum toxicity markers compared to marketed formulation Intaxel®. Thus, the lipid- and TPGS-based core–shell-type LNC with high PTX loading can advance the existing standards of therapy for overshadowing cancer.

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Acknowledgements

The authors acknowledge Fresenius Kabi for providing PTX as a gift sample. The authors are also thankful to Mr. Rahul Mahajan, NIPER, S.A.S. Nagar, for his technical assistance.

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Contributions

Sameer S. Katiyar and Ravindra Patil: responsible for conceptualizing, hypothesizing, conducting, performing, analyzing, and compiling the data for the experiments mentioned in this manuscript. Rohan Ghadi: responsible for visualizing, conceptualizing, and hypothesizing the experiments mentioned in this manuscript. Kaushik Kuche: responsible for reviewing and writing the manuscript. Varun Kushwah and Chander Parkash Dora: responsible for hypothesizing and assisting in analysis of data shown in this manuscript. Sanyog Jain: responsible for reviewing, hypothesizing, conceptualizing, and editing the final manuscript and guiding the co-authors for conducting the mentioned studies.

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Correspondence to Sanyog Jain.

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Katiyar, S.S., Patil, R., Ghadi, R. et al. Lipid- and TPGS-Based Core–Shell-Type Nanocapsules Endowed with High Paclitaxel Loading and Enhanced Anticancer Potential. AAPS PharmSciTech 23, 238 (2022). https://doi.org/10.1208/s12249-022-02389-4

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