Cited by 58Optical Imaging and Spectroscopy TechniquesAdvanced Fluorescence Microscopy TechniquesSpectroscopy Techniques in Biomedical and Chemical Research

Long-term monitoring of intravital biological processes using fluorescent protein-assisted NIR-II imaging

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Chen, Muxiong, Feng, Zhe, Fan, Xiaoxiao, Sun, Jun, Geng, Weihang, Wu, Tianxiang, Sheng, Jinghao, Qian, Jun +1 more·2022·Nature Communications

Abstract

High spatial resolution, low background, and deep tissue penetration have made near-infrared II (NIR-II) fluorescence imaging one of the most critical tools for in vivo observation and measurement. However, the relatively short retention time and potential toxicity of synthetic NIR-II fluorophores limit their long-term application. Here, we report the use of infrared fluorescent proteins (iRFPs) as in vitro and in vivo NIR-II probes permitting prolonged continuous imaging (up to 15 months). As a representative example, iRFP713 is knocked into the mouse genome to generate a transgenic model to allow temporal and/or spatial expression control of the probe. To demonstrate its feasibility in a genuine diagnostic context, we adopt two liver regeneration models and successfully track the process for a week. The performance and monitoring efficacy are comparable to those of μCT and superior to those of indocyanine green dye. We are also able to effectively observe the pancreas, despite its deep location, under both physiological and pathological conditions. These results indicate that the iRFP-assisted NIR-II fluorescence system is suitable for monitoring various tissues and in vivo biological processes, providing a powerful noninvasive long-term imaging platform.

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  • NIR-II fluorophores have deep-tissue penetration, reduced tissue autofluorescence, and low phototoxicity.

    “Near-infrared II (NIR-II) fluorophores possess transformative potential for biomedical applications, owing to their deep-tissue penetration, reduced tissue autofluorescence, and low phototoxicity.”
  • The reduced absorption and scattering of NIR-II light suppresses background noise, minimizes tissue autofluorescence, and results in negligible phototoxicity.

    “This fundamental property suppresses background noise, minimizes tissue autofluorescence, and results in negligible phototoxicity39,40.”

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Authors
Chen, M., Feng, Z., Fan, X., Sun, J., Geng, W., Wu, T., Sheng, J., Qian, J., & Xu, Z.
Affiliations
  • Sir Run Run Shaw Hospital (CN)
  • State Key Laboratory of Modern Optical Instruments (CN)
Corresponding author
  • Sheng, Jinghao
  • Qian, Jun
  • Xu, Zhengping
Venue
Nature Communications
Published
2022-11-04
Volume
13
Issue
1
Pages
6643-6643
ISSN
2041-1723 (ISSN-L)
OpenAlex
W4308195469
Cited by
57
References
47
Citations by year
2026: 14 · 2025: 15 · 2024: 20 · 2023: 8
FWCI
6.12
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Natural Science Foundation of China (2020-KYY-511108-0007, 82 001 874, 81972612, 61 975 172)
  • China Postdoctoral Science Foundation (BX20220260)
  • Zhejiang University (61975172, 2020-KYY-511108-0007)
  • Fundamental Research Funds for the Central Universities (2020-KYY-511108-0007, 61975172)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Advanced Fluorescence Microscopy Techniques
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Spectroscopy Techniques in Biomedical and Chemical Research
Keywords
NIR-II fluorescence imaging, transgenic mouse model, liver regeneration, pancreatic imaging, deep tissue imaging
MeSH terms
Animals, Biological Phenomena, Fluorescent Dyes, Indocyanine Green, Mice, Optical Imaging

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