Small Molecule Suppression
of Carbapenem Resistance in NDM-1 Producing <i>Klebsiella pneumoniae</i>
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Abstract
The already considerable global public health threat
of multidrug-resistant Gram-negative bacteria has become even more
of a concern following the emergence of New Delhi metallo-β-lactamase
(NDM-1) producing strains of <i>Klebsiella pneumoniae</i> and other Gram-negative bacteria. As an alternative approach to
the traditional development of new bactericidal entities, we have
identified a 2-aminoimidazole-derived small molecule that acts as
an antibiotic adjuvant and is able to suppress resistance of a NDM-1
producing strain of <i>K. pneumoniae</i> to imipenem and
meropenem, in addition to suppressing resistance of other β-lactam
nonsusceptible <i>K. pneumoniae</i> strains. The small molecule
is able to lower carbapenem minimum inhibitory concentrations by up
to 16-fold, while exhibiting little bactericidal activity itself