Hit discovery of Mycobacterium tuberculosis inosine 5′-monophosphate dehydrogenase, GuaB2, inhibitors
作者:Niteshkumar U. Sahu、Vinayak Singh、Davide M. Ferraris、Menico Rizzi、Prashant S. Kharkar
DOI:10.1016/j.bmcl.2018.04.045
日期:2018.6
physicochemical properties, for growth inhibitory activity against drug-sensitive MtbH37Rv. The eight hits and mycophenolic acid, a prototype IMPDH inhibitor, were further evaluated for activity on purified Mtb-GuaB2 enzyme, target selectivity using a conditional knockdown mutant of guaB2 in Mtb, followed by cross-resistance to IMPDH inhibitor-resistant SRMV2.6 strain of Mtb, and activity on human IMPDH2 isoform
结核病仍然是全球关注的问题。由于抗药性结核分枝杆菌(Mtb)的发展,迫切需要更新的抗结核药物。鸟嘌呤核苷酸生物合成所需的Mtb的肌苷5'-单磷酸脱氢酶(IMPDH)guaB2是药物开发的有吸引力的靶标。在这项研究中,我们筛选了一个集中的库,该库包含73种具有期望的计算/预测的理化性质的药物样分子,用于针对药物敏感性MtbH37Rv的生长抑制活性。进一步评估了八种命中物和一种原型IMPDH抑制剂麦考酚酸对纯化的Mtb-GuaB2酶的活性,使用条件敲低guaB2突变体在Mtb中对靶标的选择性进行了评估,然后对抗IMPDH抑制剂的SRMV2.6菌株进行交叉耐药和对人IMPDH2亚型的活性。命中之一13是5-氨基邻苯二甲酰胺衍生物,已显示出对Mtb-GuaB2酶具有抑制生长的潜力和靶标特异性。13号命中分子是有前途的分子,有可能作为抗结核药进一步发展。