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Tailoring renal-clearable zwitterionic cyclodextrin for colorectal cancer-selective drug delivery

Abstract

Although cyclodextrin-based renal-clearable nanocarriers have a high potential for clinical translation in targeted cancer therapy, their designs remain to be optimized for tumour retention. Here we report on the design of a tailored structure for renal-clearable zwitterionic cyclodextrin for colorectal cancer-selective drug delivery. Twenty cyclodextrin derivatives with different charged moieties and spacers are synthesized and screened for colloidal stability. The resulting five candidates are evaluated for biodistribution and an optimized structure is identified. The optimized cyclodextrin shows a high tumour accumulation and is used for delivery of doxorubicin and ulixertinib. Higher tumour accumulation and tumour penetration facilitates tumour elimination. The improved antitumour efficacy is demonstrated in heterotopic and orthotopic colorectal cancer models.

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Fig. 1: Renal-clearable CD derivatives for enhanced tumour retention and reduced off-target accumulation.
Fig. 2: Tumour targetability, pharmacokinetics and urinary excretion of PBA-(ZW)-CD/ACy7.
Fig. 3: Preparation and characterization of PBA-(ZW)-CD/drug inclusion complexes.
Fig. 4: Biodistribution of PBA-(ZW)-CD/drug inclusion complexes.
Fig. 5: PBA-(ZW)-CD/drug-assisted combination therapy in CRC models.

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Data availability

All data generated or analysed during this study are included in this published article and its Supplementary Information files. Source data is available for Figs. 1c,e, 2d,f,g, 3e,f, 4a,b,d,e and 5a–c,e,f, and Supplementary Figs. 8d, 9c, 11a,b, 13a,c, 14b,c, 15a,d,f, 16a,b, 17a,b, 18a,b,d, 19a–c, 20a–c, 21a,b, 22 and 25a–c in the associated source data files.

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Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) grants funded by the Ministry of Science and ICT (grant nos. NRF-2021R1C1C1009320 (J.-Y.L.); NRF-2018R1A5A2024425, NRF-2018M3A7B4071203 and NRF-2020R1A2C2099983 (D.-D.K.); and NRF-2018H1A2A1062046, (M.-J.B.)).

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M.-J.B., J.-Y.L. and D.-D.K. conceived and designed the experiments. M.-J.B., D.-T.N., D.K., S.-Y.Y. and S.M.L. performed the experiments. M.-J.B., J.-Y.L. and D.-D.K. interpreted the data and developed the discussion. M.-J.B., J.-Y.L. and D.-D.K. composed the paper. J.-Y.L. and D.-D.K. supervised the entire project.

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Correspondence to Jae-Young Lee or Dae-Duk Kim.

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Baek, MJ., Nguyen, DT., Kim, D. et al. Tailoring renal-clearable zwitterionic cyclodextrin for colorectal cancer-selective drug delivery. Nat. Nanotechnol. 18, 945–956 (2023). https://doi.org/10.1038/s41565-023-01381-8

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