Chitneni, Satish K.; Reitman, Zachary J.; Spicehandler, Rebecca; Gooden, David M.; Yan, Hai; Zalutsky, Michael R. published an article about the compound: 5-Amino-2-fluoropyridine( cas:1827-27-6,SMILESS:NC1=CN=C(C=C1)F ).Product Details of 1827-27-6. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:1827-27-6) through the article.
Mutations in the metabolic enzyme isocitrate dehydrogenase 1 (IDH1) are commonly found in gliomas. AGI-5198, a potent and selective inhibitor of the mutant IDH1 enzyme, was radiolabeled with radioiodine and fluorine-18. These radiotracers were evaluated as potential probes for imaging mutant IDH1 expression in tumors with positron emission tomog. (PET). Radioiodination of AGI-5198 was achieved using a tin precursor in 79±6% yield (n=9), and 18F-labeling was accomplished by the Ugi reaction in a decay-corrected radiochem. yield of 2.6±1.6% (n=5). The inhibitory potency of the analogous nonradioactive compounds against mutant IDH1 (IDH1-R132H) was determined in enzymic assays. Cell uptake studies using radiolabeled AGI-5198 analogs revealed somewhat higher uptake in IDH1-mutated cells than that in wild-type IDH1 cells. The radiolabeled compounds displayed favorable tissue distribution characteristics in vivo, and good initial uptake in IDH1-mutated tumor xenografts; however, tumor uptake decreased with time. Radioiodinated AGI-5198 exhibited higher tumor-to-background ratios compared with 18F-labeled AGI-5198; unfortunately, similar results were observed in wild-type IDH1 tumor xenografts as well, indicating lack of selectivity for mutant IDH1 for this tracer. These results suggest that AGI-5198 analogs are not a promising platform for radiotracer development. Nonetheless, insights gained from this study may help in design and optimization of novel chem. scaffolds for developing radiotracers for imaging the mutant IDH1 enzyme.
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