Add time:09/04/2019         Source:sciencedirect.com

Nucleoside triphosphate diphosphohydrolases (NTPDases), an important class of ectonucleotidases, are responsible for the sequential hydrolysis of extracellular nucleotides. However, over-expression of NTPDases has been linked with various pathological diseases e.g. cancer. Thus, to treat these diseases, the inhibitors of this class of enzyme are of interest. The significance of this class of enzyme encouraged us to synthesize a new class of quinoline derivatives with the aim to find selective and potent inhibitors of NTPDases. Therefore, a mild and efficient synthetic route was established for the synthesis of quinoline derivatives. The reaction was catalyzed by molecular iodine to afford the substituted quinoline derivatives. All the synthetic derivatives (3a-3w) were evaluated for their potential to inhibit the h-NTPDase1, 2, 3 and 8. Most of the compounds were identified as dual inhibitors of h-NTPDase1 and 8 with lower effects on h-NTPDase2 and 3. Two compounds i.e. 3f and 3t were identified as selective inhibitor of h-NTPDase1 whereas the compound 3s inhibited the h-NTPDase8 selectively. Moreover, the compounds 3p (IC50 = 0.23 ± 0.01 µM), 3j (IC50 = 21.0 ± 0.03 µM) 3d (IC50 = 5.38 ± 0.21 µM) and 3c (IC50 = 1.13 ± 0.04 µM) were found to be the most potent inhibitors of h-NTPDase1, 2, 3 and 8, respectively. To determine the binding interaction, molecular docking studies were also carried out.

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