Bisthiazolidines: A Substrate-Mimicking Scaffold as an Inhibitor of the NDM-1 Carbapenemase.

Bisthiazolidines: A Substrate-Mimicking Scaffold as an Inhibitor of the NDM-1 Carbapenemase.
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DOI:
10.1021/acsinfecdis.5b00046
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发表时间:
2015-11-13
影响因子:
5.3
通讯作者:
Vila, Alejandro J.
Vila, Alejandro J.
中科院分区:
医学2区
文献类型:
--
作者:
Gonzalez, Mariano M.;Kosmopoulou, Magda;Mojica, Maria F.;Castillo, Valerie;Hinchliffe, Philip;Pettinati, Ilaria;Brem, Juergen;Schofield, Christopher J.;Mahler, Graciela;Bonomo, Robert A.;Llarrull, Leticia I.;Spencer, James;Vila, Alejandro J.

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Pathogenic Gram-negative bacteria resistant to almost all β-lactam antibiotics are a major public health threat. Zn(II)-dependent or metallo-β-lactamases (MBLs) produced by these bacteria inactivate most β-lactam antibiotics, including the carbapenems, which are “last line therapies” for life-threatening Gram-negative infections. NDM-1 is a carbapenemase belonging to the MBL family that is rapidly spreading worldwide. Regrettably, inhibitors of MBLs are not yet developed. Here we present the bisthiazolidine (BTZ) scaffold as a structure with some features of β-lactam substrates, which can be modified with metal-binding groups to target the MBL active site. Inspired by known interactions of MBLs with β-lactams, we designed four BTZs that behave as in vitro NDM-1 inhibitors with Ki values in the low micromolar range (from 7 ± 1 to 19 ± 3 μM). NMR spectroscopy demonstrated that they inhibit hydrolysis of imipenem in NDM-1-producing Escherichia coli. In vitro time kill cell-based assays against a variety of bacterial strains harboring blaNDM-1 including Acinetobacter baumannii show that the compounds restore the antibacterial activity of imipenem. A crystal structure of the most potent heterocycle (L-CS319) in complex with NDM-1 at 1.9 Å resolution identified both structural determinants for inhibitor binding and opportunities for further improvements in potency.
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