A series of novel 1,3,4-oxadiazole thioether derivatives (compounds 9-44) were designed and synthesized as potential inhibitors of thymidylate synthase (TS) and as anticancer agents. The in vitro anticancer activities of these compounds were evaluated against three cancer cell lines by the MTT method. Among all the designed compounds, compound 18 bearing a nitro substituent exhibited more potent in vitro anticancer activities with IC50 values of 0.7 +/- 0.2, 30.0 +/- 1.2, 18.3 +/- 1.4 mu M, respectively, which was superior to the positive control. In the further study, it was identified as the most potent inhibitor against two kinds of TS protein (for human TS and Escherichia coli TS, IC50 values: 0.62 and 0.47 mu M, respectively) in the TS inhibition assay in vitro and the most potent antibacterial agents with MIC (minimum inhibitory concentrations) of 1.56-3.13 mu g/mL against the tested four bacterial strains. Molecular docking and 3D-QSAR study supported that compound 18 can be selected as dual antitumor/antibacterial candidate in the future study. (C) 2013 Elsevier Ltd. All rights reserved.
Pseudosymmetry and bioisosterism in biaryl pyridyl competitive histamine H2-receptor antagonists
作者:Christopher A. Lipinski、John L. LaMattina、Lyle A. Hohnke
DOI:10.1021/jm00149a015
日期:1985.11
3-amino-5-[2-(ethylamino)-4-pyridyl]-1,2,4-triazole (4), a competitive histamineH2-receptorantagonist structurally unrelated to, but more potent than, cimetidine. A QSAR study on a subset of analogues closely related to 4 showed that gastric acid antisecretory activity increased with decreasing lipophilicity. An SAR study about 4 focused on (1) pyridine substitution compatible with both unidentate and bidentate
In present study, a series of new 2-(1,3,4-oxadiazol-2-ylthio)-1-phenylethanone derivatives (6a–6x) as potential focal adhesion kinase (FAK) inhibitors were synthesized. The bioassay assays demonstrated that compound 6i showed the most potent activity, which inhibited the growth of MCF-7 and A431 cell lines with IC50 values of 140 ± 10 nM and 10 ± 1 nM, respectively. Compound 6i also exhibited significant
The present invention includes a multivalent glycan microarray for detection of glycan-binding proteins. The multivalent glycan microarray allows a multivalent presentation of glycan on a microarray substrate, which can enhance binding of the glycan binding protein to the glycan microarray. The multivalent microarray includes a solid substrate having one or more branched polymers bonded to it via one or more silane-based linker reagents. The branched polymer in turn is bonded to a glycan, via one or more bifunctional linkers to form the multivalent glycan microarray. Nonspecific binding of glycan binding proteins to the multivalent glycan microarray can be reduced by using a blocking reagent coated on to the microarray substrate, which includes a polyethylene glycol surfactant attached to the solid substrate via a self-crosslinking azido-functionalized silane. Methods for making multivalent glycan microarrays and methods for using same to detect glycan-binding proteins are also disclosed.