Volume 134, Issue 46 e202211409
Forschungsartikel

Engineering of Reversible NIR-II Redox-Responsive Fluorescent Probes for Imaging of Inflammation In Vivo

Long He

Long He

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 PR China

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Lin-Hui He

Lin-Hui He

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 PR China

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Shuai Xu

Shuai Xu

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 PR China

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Dr. Tian-Bing Ren

Corresponding Author

Dr. Tian-Bing Ren

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 PR China

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Xing-Xing Zhang

Xing-Xing Zhang

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 PR China

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Zuo-Jia Qin

Zuo-Jia Qin

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 PR China

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Prof. Xiao-Bing Zhang

Prof. Xiao-Bing Zhang

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 PR China

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Prof. Lin Yuan

Corresponding Author

Prof. Lin Yuan

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 PR China

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First published: 23 September 2022
Citations: 9

Abstract

The second near-infrared (NIR-II) fluorescent imaging shows great potential for deep tissue analysis at high resolution in living body owing to low background autofluorescence and photon scattering. However, reversible monitoring of redox homeostasis using NIR-II fluorescent imaging remains a challenge due to the lack of appropriate probes. In this study, a series of stable and multifunctional NIR-II dyes (NIR-II Cy3s) were constructed based on trimethine skeleton. Significantly, introducing the 1,4-diethyl-decahydroquinoxaline group to the NIR-II Cy3s not only effectively increased the wavelength, but also served as an effective response site for HClO, which can be restored by reactive sulfur species (RSS). Based on this, NIR-II Cy3s were used for reversible monitoring of HClO/RSS-mediated redox processes in the pathophysiology environment. Finally, NIR-II Cy3-988 was successfully utilized for assessment of the redox environments and drug treatment effects in acute inflammation model.

Conflict of interest

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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