作者:Allie Y. Chen、Pei W. Thomas、Alesha C. Stewart、Alexander Bergstrom、Zishuo Cheng、Callie Miller、Christopher R. Bethel、Steven H. Marshall、Cy V. Credille、Christopher L. Riley、Richard C. Page、Robert A. Bonomo、Michael W. Crowder、David L. Tierney、Walter Fast、Seth M. Cohen
DOI:10.1021/acs.jmedchem.7b00407
日期:2017.9.14
mediated resistance, specifically New Delhi metallo-β-lactamase-1 (NDM-1). By utilization of fragment-based drug discovery (FBDD), a new class of inhibitors for NDM-1 and two related β-lactamases, IMP-1 and VIM-2, was identified. On the basis of 2,6-dipicolinic acid (DPA), several libraries were synthesized for structure–activity relationship (SAR) analysis. Inhibitor 36 (IC50 = 80 nM) was identified
金属-β-内酰胺酶(MBL)介导的耐药性(特别是新德里金属-β-内酰胺酶-1(NDM-1))的出现和全球传播威胁着β-内酰胺类抗生素的有效性。通过利用基于片段的药物发现(FBDD),鉴定出一类新型的NDM-1抑制剂和两种相关的β-内酰胺酶IMP-1和VIM-2。在2,6-二吡啶甲酸(DPA)的基础上,合成了多个文库用于结构-活性关系(SAR)分析。与其他Zn(II)金属酶相比,抑制剂36(IC 50 = 80 nM)被鉴定为对MBL具有高度选择性。虽然DPA显示出螯合NDM-1中金属离子的倾向,但36形成了稳定的NDM-1:Zn(II):抑制剂三元络合物,如1所示。1 H NMR,电子顺磁共振(EPR)光谱,平衡透析,固有色氨酸荧光发射和UV-vis光谱。当与36种(对哺乳动物细胞无毒的浓度)共同给药时,亚胺培南对具有NDM-1的大肠杆菌和肺炎克雷伯菌的临床分离株的最低抑制浓度(MIC)降低至易感水平。