Volume 63, Issue 12 e202317775
Research Article

High-nuclearity Luminescent Lanthanide Nanocages for Tumor Drug Delivery

Dr. Shi-Qing Wang

Dr. Shi-Qing Wang

College of Chemistry and Materials Engineering, Zhejiang Key Laboratory of Carbon Materials, Wenzhou University, Wenzhou, 325035 China

These authors contributed equally to this work.

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Dr. Yili Wang

Dr. Yili Wang

Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325035 China

These authors contributed equally to this work.

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Prof. Xiaoping Yang

Corresponding Author

Prof. Xiaoping Yang

College of Chemistry and Materials Engineering, Zhejiang Key Laboratory of Carbon Materials, Wenzhou University, Wenzhou, 325035 China

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Yong Liu

Yong Liu

Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325035 China

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Prof. Huaqiong Li

Corresponding Author

Prof. Huaqiong Li

Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 325035 China

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Zhi Yang

Corresponding Author

Zhi Yang

College of Chemistry and Materials Engineering, Zhejiang Key Laboratory of Carbon Materials, Wenzhou University, Wenzhou, 325035 China

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Prof. Wei-Yin Sun

Prof. Wei-Yin Sun

State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023 China

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Prof. Jonathan L. Sessler

Corresponding Author

Prof. Jonathan L. Sessler

Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street—A5300, Austin, Texas, 78712-1224 United States

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First published: 29 January 2024
Citations: 2

Graphical Abstract

Two 60-metal lanthanide nanocages (Ln60, Ln=Eu and Tb) constructed from Schiff base ligands were used as molecular drug delivery agents (DOX@Ln60, DOX=doxorubicin). They provided for effective tumor therapy in a murine model with negligible side effects. Moreover, DOX@Ln60 proved luminescent and efficiently internalized by breast cancer cells, allowing these cells to be readily visualized.

Abstract

There is an unmet need for easy-to-visualize drug carriers that can deliver therapeutic cargoes deep into solid tumors. Herein, we report the preparation of ultrasmall luminescent imine-based lanthanide nanocages, Eu60 and Tb60 (collectively Ln60), designed to encapsulate anticancer chemotherapeutics for tumor therapy. The as-prepared nanocages possess large cavities suitable for the encapsulation of doxorubicin (DOX), yielding DOX@Ln60 nanocages with diameters around 5 nm. DOX@Ln60 are efficiently internalized by breast cancer cells, allowing the cells to be visualized via the intrinsic luminescent property of Ln(III). Once internalized, the acidic intracellular microenvironment promotes imine bond cleavage and the release of the loaded DOX. DOX@Ln60 inhibits DNA replication and triggers tumor cell apoptosis. In a murine triple negative breast cancer (TNBC) model, DOX@Ln60 was found to inhibit tumor growth with negligible side effects on normal tissues. It proved more effective than various controls, including DOX and Ln60. The present nanocages thus point the way to the development of precise nanomedicines for tumor imaging and therapy.

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 supplementary material of this article.

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