Structure-Guided Drug Design of 6-Substituted Adenosine Analogues as Potent Inhibitors of <i>Mycobacterium tuberculosis</i> Adenosine Kinase
作者:Roberto A. Crespo、Qun Dang、Nian E. Zhou、Liam M. Guthrie、Thomas C. Snavely、Wen Dong、Kimberly A. Loesch、Takao Suzuki、Lanying You、Wei Wang、Theresa O’Malley、Tanya Parish、David B. Olsen、James C. Sacchettini
DOI:10.1021/acs.jmedchem.9b00020
日期:2019.5.9
(MtbAdoK) is an essential enzyme of Mtb and forms part of the purine salvage pathway within mycobacteria. Evidence suggests that the purine salvage pathway might play a crucial role in Mtb survival and persistence during its latent phase of infection. In these studies, we adopted a structural approach to the discovery, structure-guided design, and synthesis of a series of adenosine analogues that displayed
Synthesis of Novel 6-(4-Substituted piperazine-1-yl)-9-(β-<scp>d</scp>-ribofuranosyl)purine Derivatives, Which Lead to Senescence-Induced Cell Death in Liver Cancer Cells
Novel purine ribonucleoside analogues (9-13) containing a 4-substituted piperazine in the substituent at N-6 were synthesized and evaluated for their cytotoxicity on Huh7, HepG2, FOCUS, Mahlavu liver, MCF7 breast, and HCT116 colon carcinoma cell lines. The purine nucleoside analogues were analyzed initially by an anticancer drug-screening method based on a sulforhodamine B assay. Two nucleoside derivatives with promising cytotoxic activities (11 and 12) were further analyzed on the hepatoma cells. The N-6-(4-Trifluoromethylphenyl)piperazine analogue 11 displayed the best antitumor activity, with IC50 values between 5.2 and 9.2 mu M. Similar to previously described nucleoside analogues, compound 11 also interferes with cellular ATP reserves, possibly through influencing cellular kinase activities. Furthermore, the novel nucleoside analogue 11 was shown to induce senescence-associated cell death, as demonstrated by the SA beta-gal assay. The senescence-dependent cytotoxic effect of 11 was also confirmed through phosphorylation of the Rb protein by p15(INK4b) overexpression in the presence of this compound.