Design of Helicobacter pylori glutamate racemase inhibitors as selective antibacterial agents: A novel pro-drug approach to increase exposure
作者:Gregory S. Basarab、Pamela J. Hill、Abdullah Rastagar、Peter J.H. Webborn
DOI:10.1016/j.bmcl.2008.06.092
日期:2008.8
High-throughput screening uncovered a pyrazolopyrimidinedione hit as a selective, low micromolar inhibitor of Helicobacter pylori glutamate racemase (MurI). Variation of the substituents around the scaffold led to low nanomolar inhibitors and improved antibacterial activity. The challenge in this program was to translate excellent enzyme inhibition into potent antibacterial activity and pharmacokinetics
高通量筛选发现,吡唑并嘧啶二酮是幽门螺杆菌谷氨酸消旋酶(MurI)的一种选择性,低微摩尔抑制剂。支架周围取代基的变化导致低纳摩尔抑制剂并提高了抗菌活性。该程序面临的挑战是将出色的酶抑制作用转化为适用于口服治疗的有效抗菌活性和药代动力学。针对小鼠的MurI抑制,针对幽门螺杆菌的活性,微粒体稳定性和药代动力学对化合物进行了分析。模拟合成和生物学测试的反复循环导致了具有针对低MIC(2 microg / ml)和良好的微粒体稳定性而优化的取代基的化合物。为了获得高生物利用度,