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- W2191291710 abstract "Solid tumors are hypoxic with altered metabolism, resulting in secretion of acids into the extracellular matrix and lower relative pH, a feature associated with local invasion and metastasis. Therapeutic and diagnostic agents responsive to this microenvironment may improve tumor-specific delivery. Therefore, we pursued a general strategy whereby caged small-molecule drugs or imaging agents liberate their parent compounds in regions of low interstitial pH. In this manuscript, we present a new acid-labile prodrug method based on the glycosylamine linkage, and its application to a class of positron emission tomography (PET) imaging tracers, termed [18F]FDG amines. [18F]FDG amines operate via a proposed two-step mechanism, in which an acid-labile precursor decomposes to form the common radiotracer 2-deoxy-2-[18F]fluoro-d-glucose, which is subsequently accumulated by glucose avid cells. The rate of decomposition of [18F]FDG amines is tunable in a systematic fashion, tracking the pKa of the parent amine. In vivo, a 4-phenylbenzylamine [18F]FDG amine congener showed greater relative accumulation in tumors over benign tissue, which could be attenuated upon tumor alkalinization using previously validated models, including sodium bicarbonate treatment, or overexpression of carbonic anhydrase. This new class of PET tracer represents a viable approach for imaging acidic interstitial pH with potential for clinical translation." @default.
- W2191291710 created "2016-06-24" @default.
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- W2191291710 date "2015-12-22" @default.
- W2191291710 modified "2023-10-18" @default.
- W2191291710 title "Caged [<sup>18</sup>F]FDG Glycosylamines for Imaging Acidic Tumor Microenvironments Using Positron Emission Tomography" @default.
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- W2191291710 doi "https://doi.org/10.1021/acs.bioconjchem.5b00584" @default.
- W2191291710 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4854293" @default.
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