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N (1)-Fluoroalkyltryptophan Analogues: Synthesis and in vitro Study as Potential Substrates for Indoleamine 2,3-Dioxygenase


, : N (1)-Fluoroalkyltryptophan Analogues: Synthesis and in vitro Study as Potential Substrates for Indoleamine 2,3-Dioxygenase. Acs Medicinal Chemistry Letters 6(3): 260-265

Indoleamine 2,3-dioxygenase (hIDO) is an enzyme that catalyzes the oxidative cleavage of the indole ring of l-tryptophan through the kynurenine pathway, thereby exerting immunosuppressive properties in inflammatory and tumoral tissues. The syntheses of 1-(2-fluoroethyl)-tryptophan (1-FETrp) and 1-((1-(2-fluoroethyl)-1H-1,2,3-triazol-4-yl)methyl)-tryptophan, two N (1)-fluoroalkylated tryptophan derivatives, are described here. In vitro enzymatic assays with these two new potential substrates of hIDO show that 1-FETrp is a good and specific substrate of hIDO. Therefore, its radioactive isotopomer, 1-[(18)F]FETrp, should be a molecule of choice to visualize tumoral and inflammatory tissues and/or to validate new potential inhibitors.

US$19.90

PMID: 25815143

DOI: 10.1021/ml500385d


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