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Cellular-level Real-time Pharmacokinetic Imaging of Free-form and Liposomal Indocyanine Green in Liver

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Specialty Radiology
Date 2017 Oct 31
PMID 29082096
Citations 14
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Abstract

Indocyanine green (ICG) is a near-infrared fluorophore approved for human use which has been widely used for various clinical applications. Despite the well-established clinical usage, our understanding about the microscopic pharmacokinetics of systemically administered ICG has been relatively limited. In this work, we successfully visualized real-time pharmacokinetic dynamics of the intravenously injected free-form and liposomal ICG in cellular resolution by utilizing a custom-built video-rate near infrared laser-scanning confocal microscopy system. Initial perfusion and clearance from blood stream, diffusion into perisinusoidal space, and subsequent absorption into hepatocyte were directly visualized . The quantification analysis utilizing the real-time image sequences revealed distinct dynamic pharmacokinetic behavior of free-form and liposomal ICG.

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