Volume 9, Issue 7 2402249
Research Article

Tracking In Vivo Lipolysis of Lipid Nanocarriers Using NIR-II Polarity-Sensitive Fluorescent Probes

Yanlei Zhan

Yanlei Zhan

School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai, 201203 P. R. China

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Zhichao Chang

Zhichao Chang

School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai, 201203 P. R. China

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Chang Liu

Chang Liu

Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, 200443 P. R. China

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Ziyu Zhang

Ziyu Zhang

School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai, 201203 P. R. China

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Runtong Zhang

Runtong Zhang

School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai, 201203 P. R. China

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Yi Lu

Yi Lu

School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai, 201203 P. R. China

Fudan Zhangjiang Institute, Shanghai, 201203 P. R. China

National Key Laboratory of Advanced Drug Formulations for Overcoming Delivery Barriers, Shanghai, 201203 P. R. China

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Jianping Qi

Jianping Qi

School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai, 201203 P. R. China

National Key Laboratory of Advanced Drug Formulations for Overcoming Delivery Barriers, Shanghai, 201203 P. R. China

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Wei Wu

Corresponding Author

Wei Wu

School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai, 201203 P. R. China

Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, 200443 P. R. China

Fudan Zhangjiang Institute, Shanghai, 201203 P. R. China

National Key Laboratory of Advanced Drug Formulations for Overcoming Delivery Barriers, Shanghai, 201203 P. R. China

Center for Medical Research and Innovation, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, 201399 P. R. China

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

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Haisheng He

Corresponding Author

Haisheng He

School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai, 201203 P. R. China

National Key Laboratory of Advanced Drug Formulations for Overcoming Delivery Barriers, Shanghai, 201203 P. R. China

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

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First published: 11 March 2025
Citations: 1

Abstract

Elucidating in vivo lipolysis is crucial for clarifying the underlying mechanisms and in vivo fates of lipid-based nanocarriers, which are essential oral drug delivery carriers. Current mainstream methodologies use various in vitro digestion models to predict the in vivo performance of lipid formulations; however, their accuracy is often impeded by the complicated environment of the gastrointestinal tract. Although fluorescence labeling with conventional probes partly reveals the in vivo translocation of lipid nanocarriers, it fails to elucidate the lipolysis process because of poor signal discrimination among nanocarriers, free probes, and mixed micelles (lipolysis end-products). Here, a polarity-sensitive probe (PN-C18) with aggregation-caused quenching properties for labeling lipid nanocarriers is developed and optimized. PN-C18 successfully eliminates interference from both free probes and mixed micelles during lipolysis. In a representative in vitro lipolysis model, PN-C18 labeling shows stronger correlation between fluorescence intensity and lipolysis progression than those of previous methods. In vivo, the translocation and lipolysis of lipid nanoparticles are clearly visualized and effectively monitored, owing to the high tissue-penetrating capability of PN-C18 NIR-II photons. This study provides practical means for elucidating the in vivo fate of lipid-based drug delivery systems and offers valuable insights and reference for further studies in this domain.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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