Cornelius Cilliers1, Jianshan Liao1, Lydia Atangcho1, Greg M Thurber2,3. 1. Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA. 2. Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA. gthurber@umich.edu. 3. Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA. gthurber@umich.edu.
Abstract
PURPOSE: Near-infrared (NIR) fluorescence imaging is widely used for tracking antibodies and biomolecules in vivo. Clinical and preclinical applications include intraoperative imaging, tracking therapeutics, and fluorescent labeling as a surrogate for subsequent radiolabeling. Despite their extensive use, one of the fundamental properties of NIR dyes, the residualization rate within cells following internalization, has not been systematically studied. This rate is required for the rational design of probes and proper interpretation of in vivo results. PROCEDURES: In this brief report, we measure the cellular residualization rate of eight commonly used dyes encompassing three core structures (cyanine, boron-dipyrromethene (BODIPY), and oxazine/thiazine/carbopyronin). RESULTS: We identify residualizing (half-life >24 h) and non-residualizing (half-life <24 h) dyes in both the far-red (~650-680 nm) and near-infrared (~740-800 nm) regions. CONCLUSIONS: This data will allow researchers to independently and rationally select the wavelength and residualizing nature of dyes for molecular imaging agent design.
PURPOSE: Near-infrared (NIR) fluorescence imaging is widely used for tracking antibodies and biomolecules in vivo. Clinical and preclinical applications include intraoperative imaging, tracking therapeutics, and fluorescent labeling as a surrogate for subsequent radiolabeling. Despite their extensive use, one of the fundamental properties of NIR dyes, the residualization rate within cells following internalization, has not been systematically studied. This rate is required for the rational design of probes and proper interpretation of in vivo results. PROCEDURES: In this brief report, we measure the cellular residualization rate of eight commonly used dyes encompassing three core structures (cyanine, boron-dipyrromethene (BODIPY), and oxazine/thiazine/carbopyronin). RESULTS: We identify residualizing (half-life >24 h) and non-residualizing (half-life <24 h) dyes in both the far-red (~650-680 nm) and near-infrared (~740-800 nm) regions. CONCLUSIONS: This data will allow researchers to independently and rationally select the wavelength and residualizing nature of dyes for molecular imaging agent design.
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