A series of purin-6-one derivatives were synthesized, and theirin vitroinhibitory activity against phosphodiesterase-2 (PDE2) was evaluated by using a fluorescence polarization assay. Three compounds, that are,2j,2p, and2q, showed significant inhibitory activity against PDE2 with IC50values of 1.73, 0.18, and 3.43 μM, respectively. Structure-activity relationship (SAR) analysis was performed to explore the relationship between the chemical structures of these compounds and their inhibitory activity. Compounds2j,2p, and2qwere further selected for molecular docking study. The docking results suggested that these ligands bind with hydrophobic pockets of the catalytic active site of PDE2, where a Tyr655 residue was found to be important in binding with compound2p, the most potent inhibitor identified in this study. Our present study provides useful information for the future design of novel PDE2 inhibitors.
合成了一系列嘌呤-6-酮衍生物,并利用荧光极化测定法评估它们对磷酸二酯酶-2(PDE2)的体外抑制活性。其中三种化合物,即2j、2p和2q,显示出对PDE2的显著抑制活性,其IC50值分别为1.73、0.18和3.43 μM。进行了结构活性关系(SAR)分析,以探索这些化合物的化学结构与它们的抑制活性之间的关系。化合物2j、2p和2q进一步被选择用于分子对接研究。对接结果表明,这些配体与PDE2的催化活性位点的疏水口袋结合,其中Tyr655残基被发现在与化合物2p结合中起重要作用,这是本研究中发现的最有效的抑制剂。我们的研究为未来设计新型PDE2抑制剂提供了有用的信息。