Volume 64, Issue 30 e202509002
Research Article

A Neutral Single-Molecule Carrier for Delivery of Phosphonate Drugs

Qingling Nie

Qingling Nie

Key Laboratory of Medicinal Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

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Prof. Dr. Juan Tang

Corresponding Author

Prof. Dr. Juan Tang

Key Laboratory of Medicinal Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

E-mail: [email protected]; [email protected]; [email protected]

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Yongsheng Li

Yongsheng Li

Key Laboratory of Medicinal Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

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Ji Wang

Ji Wang

Key Laboratory of Medicinal Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

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Prof. Dr. Boyang Li

Prof. Dr. Boyang Li

School of Chemistry and Chemical Engineering College of Chemistry & Pharmacy, Northwest A&F University, Yangling, Shaanxi, 712100 China

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Prof. Dr. Hongwei Ma

Prof. Dr. Hongwei Ma

Analysis & Testing Center, Beijing Institute of Technology, Beijing, 102488 China

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Prof. Dr. Xiao-Juan Yang

Prof. Dr. Xiao-Juan Yang

Key Laboratory of Medicinal Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

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Prof. Dr. Wei Zhao

Corresponding Author

Prof. Dr. Wei Zhao

Key Laboratory of Medicinal Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

E-mail: [email protected]; [email protected]; [email protected]

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Prof. Dr. Biao Wu

Corresponding Author

Prof. Dr. Biao Wu

Key Laboratory of Medicinal Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488 China

E-mail: [email protected]; [email protected]; [email protected]

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First published: 22 May 2025

Graphical Abstract

The first application of a neutral anion receptor as a “single-molecule carrier” for targeted delivery of phosphonate drugs into living cells through anion coordination.

Abstract

Phosphate/phosphonate-based drugs (PDs), as multinegative, hydrophilic molecules, face the greatest difficulty in diffusion across biological membranes, leading to poor bioavailability. Conventional drug delivery strategies to overcome this issue, including utilizing small-molecule prodrugs or nanoparticle carriers, often suffer from case-specific modifications or uncertainties in drug loading. Inspired by the anion coordination chemistry of natural phosphate transporters and artificial anion receptors, here, we present the first use of a neutral anion receptor, i.e., bis(tripodal hexaurea) cage 1, as a “single-molecule carrier” for the delivery of PDs into living cells. Cage 1 features advantages of molecular-level encapsulation, enhanced intracellular accumulation, subcellular targeting, responsive drug release, and broad adaptability. It enhances PD accumulation in tumor cells both in vitro and in vivo, enhancing the cellular uptake of mono-, di-, and tri-phosphate/phosphonate substrates by up to 45-fold via a macropinocytosis-mediated endocytosis pathway. This work demonstrates the potential of neutral anion receptors to serve as single-molecule carriers and offers a promising solution for improving PDs bioavailability, advancing the development of antitumor phosphate/phosphonate-based drugs.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

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