Cited by 721Optical Imaging and Spectroscopy TechniquesSpectroscopy Techniques in Biomedical and Chemical ResearchNanoplatforms for cancer theranostics

Shortwave infrared fluorescence imaging with the clinically approved near-infrared dye indocyanine green

Open access
Carr, Jessica A., Franke, Daniel, Caram, Justin R., Perkinson, Collin F., Saif, Mari, Askoxylakis, Vasileios, Datta, Meenal, Fukumura, Dai +3 more·2018·Proceedings of the National Academy of Sciences

Published version of a preprint

Abstract

Significance: Imaging in the shortwave IR (SWIR) spectral window allows the observation of processes deep within living animals. Recent studies have shown that SWIR imaging enables unprecedented imaging opportunities, including contact-free monitoring of vital signs, generation of microvasculature blood flow maps, real-time metabolic imaging, and molecularly targeted imaging. Yet, whereas bright SWIR fluorophores have been developed for preclinical research settings, applications in the clinic have been held back by the conventional belief that no clinically approved fluorophore is available. Here, we show that indocyanine green, a clinically approved near-IR dye, exhibits a remarkable amount of SWIR emission, which enables state-of-the-art SWIR imaging with direct translation potential into clinical settings, and even outperforms other commercially available SWIR emitters.

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Registry

Crossref · 10.1073/pnas.1718917115

Cites

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  • The common issue of low chemical stability and reduced fluorescence intensity of polymethines in an aqueous environment can be overcome by proper charge balancing and the introduction of steric shielding.

    “The common issue of low chemical stability and reduced fluorescence intensity of polymethines in an aqueous environment can be overcome by proper charge balancing and the introduction of steric shielding.29,32,33”

    From The Pursuit of Shortwave Infrared-Emitting Nanoparticles with Bright Fluorescence through Molecular Design and Excited-State Engineering of Molecular Aggregates (2022) · cites this paper as [29]

    The “NIR Dye Emission Detected with InGaAs” section (page unavailable) reports that ICG fluorescence is quenched in water and that binding to blood proteins stabilizes the dye and increases its quantum yield. It does not say that charge balancing or steric shielding overcomes low stability or fluorescence intensity in aqueous polymethines. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Clinically approved agents available for tumor detection and therapy remain extremely limited, with examples including methylene blue and indocyanine green.

    “Despite the significant advantages of organic small-molecule fluorescent probes, clinically approved agents available for tumor detection and therapy remain extremely limited (e.g., methylene blue, indocyanine green (ICG))63–66.”

    From Organic small-molecule NIR-II fluorophores for tumor phototheranostics (2026) · cites this paper as [65]

    The Abstract (page not provided) identifies indocyanine green as FDA-approved and lists cancer localization among applications of it and other near-infrared dyes. It describes a shortage of approved dyes specifically for shortwave-infrared imaging, not a general shortage of approved agents for tumor detection and therapy. The cited paper does not identify methylene blue as an example. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Indocyanine green (ICG) has measurable long-tail fluorescence emission that stretches to 1500 nm in the SWIR region.

    “Recently, the spectroscopic characterization of NIR indocyanine green dye (ICG) revealed measurable long-tail fluorescence emission that stretches to 1500 nm in the SWIR region.28,29”
  • Tail fluorescence emission sometimes allows high-contrast imaging with current organic SWIR fluorophores.

    “This tail fluorescence emission sometimes allows high-contrast imaging with current organic SWIR fluorophores.29,34,96,219,220”

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Cites

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Research works printed but not linked: 2

  1. Leung K (2004) IRDye 800CW-human serum albumin. Available at https://www.ncbi. nlm.nih.gov/pubmed/20641282. Accessed December 21, 2016.
  2. Carr JA, et al. (2017) Shortwave infrared fluorescence imaging with the clinically approved near-infrared dye indocyanine green. bioRxiv:10.1101/100768. · DOI

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Authors
Carr, J. A., Franke, D., Caram, J. R., Perkinson, C. F., Saif, M., Askoxylakis, V., Datta, M., Fukumura, D., Jain, R. K., Bawendi, M. G., & Bruns, O. T.
Affiliations
  • Massachusetts Institute of Technology (US)
  • Harvard University (US)
  • Tufts University (US)
  • Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139;
Venue
Proceedings of the National Academy of Sciences
Published
2018-04-06
Volume
115
Issue
17
Pages
4465-4470
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2949289995
Cited by
721
References
65
Citations by year
2026: 60 · 2025: 67 · 2024: 99 · 2023: 101 · 2022: 97 · 2021: 96 · 2020: 107 · 2019: 65 · 2018: 26 · 2017: 3
FWCI
50.70
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc)
  • eScholarship (California Digital Library) (submittedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
  • HHS | National Institutes of Health (9-P41-EB015871-26A1, CA080124, CA126642, CA197743, CA096915)
  • Massachusetts Institute of Technology (W911NF-13-D-0001)
  • National Science Foundation (EECS-1449291, GRFP Fellowship)
  • DOE | Office of Science (DE-FG02-07ER46454)
  • U.S. Department of Defense (W81XWH-10-1-0016)
  • DOD | USAF | AFMC | Air Force Office of Scientific Research (NDSEG 32 CFR 168a)
  • Boehringer Ingelheim Stiftung (Fellowship)
  • European Molecular Biology Organization (Fellowship)
  • HHS | NIH | National Heart, Lung, and Blood Institute (F31HL126449)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Spectroscopy Techniques in Biomedical and Chemical Research
  • Physical Sciences › Engineering › Biomedical Engineering › Nanoplatforms for cancer theranostics
Keywords
indocyanine green, near-infrared dyes, in vivo molecular imaging, intravital microscopy, hepatobiliary clearance, tumor-targeted imaging, trastuzumab, IRDye800CW
MeSH terms
Trastuzumab, Intravital Microscopy, Animals, Blood Vessels, Cattle, Contrast Media, Fluorescent Dyes, Indocyanine Green, Infrared Rays, Microscopy, Fluorescence, Lymphatic Vessels, Mice

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