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Imaging targeted-agent binding in vivo with two probes.


ABSTRACT: An approach to quantitatively image targeted-agent binding rate in vivo is demonstrated with dual-probe injection of both targeted and nontargeted fluorescent dyes. Images of a binding rate constant are created that reveal lower than expected uptake of epidermal growth factor in an orthotopic xenograft pancreas tumor (2.3 x 10(-5) s(-1)), as compared to the normal pancreas (3.4 x 10(-5) s(-1)). This approach allows noninvasive assessment of tumor receptor targeting in vivo to determine the expected contrast, spatial localization, and efficacy in therapeutic agent delivery.

SUBMITTER: Pogue BW 

PROVIDER: S-EPMC2909298 | biostudies-other | 2010 May-Jun

REPOSITORIES: biostudies-other

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