Novel Cephalosporin Conjugates Display Potent and Selective Inhibition of Imipenemase-Type Metallo-β-Lactamases
作者:Kamaleddin H. M. E. Tehrani、Nicola Wade、Vida Mashayekhi、Nora C. Brüchle、Willem Jespers、Koen Voskuil、Diego Pesce、Matthijs J. van Haren、Gerard J. P. van Westen、Nathaniel I. Martin
DOI:10.1021/acs.jmedchem.1c00362
日期:2021.7.8
enzymatic hydrolysis of the β-lactam ring was observed, it was not accompanied by inhibitor release. Nonetheless, the cephalosporin prodrugs, especially thiomandelic acid conjugate (8), demonstrated potent inhibition of IMP-type MBLs. In addition, conjugate 8 was also found to greatly reduce the minimum inhibitory concentration of meropenem against IMP-producing bacteria. The results of kinetic experiments
为了探索β-内酰胺酶降解头孢菌素的水解机制,我们设计并合成了一系列新型头孢菌素前药,旨在以时空控制的方式递送金属β-内酰胺酶(MBL)的巯基抑制剂。虽然观察到 β-内酰胺环的酶促水解,但不伴随抑制剂的释放。尽管如此,头孢菌素前药,尤其是硫扁桃酸偶联物 ( 8 ),显示出对 IMP 型MBL 的有效抑制。此外,共轭8还发现美罗培南对产生 IMP 的细菌的最小抑制浓度大大降低。动力学实验结果表明,这些前药通过充当缓慢翻转的底物来抑制 IMP 型 MBL。构效关系研究表明,8 的苯基和羧基部分对其效力至关重要。此外,建模研究表明8的硫扁桃酸部分与 IMP 活性位点内的 Trp28 的有效相互作用可能有助于其效力和选择性。