β-Lactamases (BLs) able to hydrolyze β-lactam antibiotics and more importantly the last resort carbapenems, represent a major mechanism of resistance in Gram-negative bacteria showing multi-drug or extensively drug resistant phenotypes. The early detection of BLs responsible of resistant infections is challenging: approaches aiming at the identification of new BLs inhibitors (BLI) can thus serve as the basis for the development of highly needed diagnostic tools. Starting from benzo-[b]-thiophene-2-boronic acid (BZB), a nanomolar inhibitor of AmpC β-lactamase (Ki= 27 nM), we have identified and characterized a set of BZB analogues able to inhibit clinically-relevant β-lactamases, including AmpC, Extended-Spectrum BLs (ESBL), KPC- and OXA-type carbapenemases and metallo-β-lactamases (MBL). A multiligand set of boronic acid (BA) β-lactamase inhibitors was obtained using covalent molecular modeling, synthetic chemistry, enzyme kinetics and antibacterial susceptibility testing. Data confirmed the possibility to discriminate between clinically-relevant β-lactamases on the basis of their inhibition profile. Interestingly, this work also allowed the identification of potent KPC-2 and NDM-1 inhibitors able to potentiate the activity of cefotaxime (CTX) and ceftazidime (CAZ) against resistant clinical isolates (MIC reduction, 32-fold). Our results open the way to the potential use of our set of compounds as a diagnostic tool for the sensitive detection of clinically-relevant β-lactamases.

Computational and biological profile of boronic acids for the detection of bacterial serine- and metallo-beta-lactamases / Santucci, Matteo; Spyrakis, Francesca; Cross, Simon; Quotadamo, Antonio; Farina, Davide; Tondi, Donatella; De Luca, Filomena; Docquier, Jean-Denis; Prieto, Ana Isabel; Ibacache, Claudia; Blázquez, Jesús; Venturelli, Alberto; Cruciani, Gabriele; Costi, Maria Paola. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 7:1(2017), pp. 17716-17731. [10.1038/s41598-017-17399-7]

Computational and biological profile of boronic acids for the detection of bacterial serine- and metallo-beta-lactamases

Santucci, Matteo;Spyrakis, Francesca;Quotadamo, Antonio;Farina, Davide;Tondi, Donatella;Venturelli, Alberto;Costi, Maria Paola
2017

Abstract

β-Lactamases (BLs) able to hydrolyze β-lactam antibiotics and more importantly the last resort carbapenems, represent a major mechanism of resistance in Gram-negative bacteria showing multi-drug or extensively drug resistant phenotypes. The early detection of BLs responsible of resistant infections is challenging: approaches aiming at the identification of new BLs inhibitors (BLI) can thus serve as the basis for the development of highly needed diagnostic tools. Starting from benzo-[b]-thiophene-2-boronic acid (BZB), a nanomolar inhibitor of AmpC β-lactamase (Ki= 27 nM), we have identified and characterized a set of BZB analogues able to inhibit clinically-relevant β-lactamases, including AmpC, Extended-Spectrum BLs (ESBL), KPC- and OXA-type carbapenemases and metallo-β-lactamases (MBL). A multiligand set of boronic acid (BA) β-lactamase inhibitors was obtained using covalent molecular modeling, synthetic chemistry, enzyme kinetics and antibacterial susceptibility testing. Data confirmed the possibility to discriminate between clinically-relevant β-lactamases on the basis of their inhibition profile. Interestingly, this work also allowed the identification of potent KPC-2 and NDM-1 inhibitors able to potentiate the activity of cefotaxime (CTX) and ceftazidime (CAZ) against resistant clinical isolates (MIC reduction, 32-fold). Our results open the way to the potential use of our set of compounds as a diagnostic tool for the sensitive detection of clinically-relevant β-lactamases.
18-dic-2017
7
1
17716
17731
Computational and biological profile of boronic acids for the detection of bacterial serine- and metallo-beta-lactamases / Santucci, Matteo; Spyrakis, Francesca; Cross, Simon; Quotadamo, Antonio; Farina, Davide; Tondi, Donatella; De Luca, Filomena; Docquier, Jean-Denis; Prieto, Ana Isabel; Ibacache, Claudia; Blázquez, Jesús; Venturelli, Alberto; Cruciani, Gabriele; Costi, Maria Paola. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 7:1(2017), pp. 17716-17731. [10.1038/s41598-017-17399-7]
Santucci, Matteo; Spyrakis, Francesca; Cross, Simon; Quotadamo, Antonio; Farina, Davide; Tondi, Donatella; De Luca, Filomena; Docquier, Jean-Denis; Prieto, Ana Isabel; Ibacache, Claudia; Blázquez, Jesús; Venturelli, Alberto; Cruciani, Gabriele; Costi, Maria Paola
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/1154032
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