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Article Abstract
Integrin αvβ6 is an attractive target for theranostic applications in pancreatic ductal adenocarcinoma (PDAC). Yet, there remains a lack of an ideal PET/CT tracer targeting αvβ6. In this study, we designed two novel PET/CT tracers [F]AlF-Glc-αvβ6L and [F]AlF-Asp2-αvβ6L with hydrophilic linkers. Both [F]AlF-Glc-αvβ6L and [F]AlF-Asp2-αvβ6L demonstrated favorable and properties, which are characterized by high hydrophilicity. In pancreatic tumor-bearing mice, micro-PET/CT imaging and biodistribution studies demonstrated that both [F]AlF-Glc-αvβ6L and [F]AlF-Asp2-αvβ6L had favorable pharmacokinetic properties, good specific targeting to αvβ6, and tumor-to-background contrast. Between them, [F]AlF-Asp2-αvβ6L demonstrated superior stability and accelerated renal clearance than [F]AlF-Glc-αvβ6L, with comparable tumor uptake and retention and significantly lower kidney uptake. The results indicate that [F]AlF-Asp2-αvβ6L is a promising PET/CT tracer for PDAC imaging.
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| http://dx.doi.org/10.1021/acs.jmedchem.5c01189 | DOI Listing |
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