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Docquier JD, Mangani S. An update on β-lactamase inhibitor discovery and development. Drug Resist Updat 2017; 36:13-29. [PMID: 29499835 DOI: 10.1016/j.drup.2017.11.002] [Citation(s) in RCA: 140] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 11/01/2017] [Accepted: 11/03/2017] [Indexed: 11/27/2022]
Abstract
Antibiotic resistance, and the emergence of pan-resistant clinical isolates, seriously threatens our capability to treat bacterial diseases, including potentially deadly hospital-acquired infections. This growing issue certainly requires multiple adequate responses, including the improvement of both diagnosis methods and use of antibacterial agents, and obviously the development of novel antibacterial drugs, especially active against Gram-negative pathogens, which represent an urgent medical need. Considering the clinical relevance of both β-lactam antibiotics and β-lactamase-mediated resistance, the discovery and development of combinations including a β-lactamase inhibitor seems to be particularly attractive, despite being extremely challenging due to the enormous diversity, both structurally and mechanistically, of the potential β-lactamase targets. This review will cover the evolution of currently available β-lactamase inhibitors along with the most recent research leading to new β-lactamase inhibitors of potential clinical interest or already in the stage of clinical development.
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Affiliation(s)
- Jean-Denis Docquier
- Department of Medical Biotechnology, University of Siena, Viale Bracci 16, 53100 Siena, Italy.
| | - Stefano Mangani
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy.
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2
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Rossolini GM, Arena F, Giani T. Mechanisms of Antibacterial Resistance. Infect Dis (Lond) 2017. [DOI: 10.1016/b978-0-7020-6285-8.00138-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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3
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Montagner C, Nigen M, Jacquin O, Willet N, Dumoulin M, Karsisiotis AI, Roberts GCK, Damblon C, Redfield C, Matagne A. The Role of Active Site Flexible Loops in Catalysis and of Zinc in Conformational Stability of Bacillus cereus 569/H/9 β-Lactamase. J Biol Chem 2016; 291:16124-37. [PMID: 27235401 DOI: 10.1074/jbc.m116.719005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Indexed: 11/06/2022] Open
Abstract
Metallo-β-lactamases catalyze the hydrolysis of most β-lactam antibiotics and hence represent a major clinical concern. The development of inhibitors for these enzymes is complicated by the diversity and flexibility of their substrate-binding sites, motivating research into their structure and function. In this study, we examined the conformational properties of the Bacillus cereus β-lactamase II in the presence of chemical denaturants using a variety of biochemical and biophysical techniques. The apoenzyme was found to unfold cooperatively, with a Gibbs free energy of stabilization (ΔG(0)) of 32 ± 2 kJ·mol(-1) For holoBcII, a first non-cooperative transition leads to multiple interconverting native-like states, in which both zinc atoms remain bound in an apparently unaltered active site, and the protein displays a well organized compact hydrophobic core with structural changes confined to the enzyme surface, but with no catalytic activity. Two-dimensional NMR data revealed that the loss of activity occurs concomitantly with perturbations in two loops that border the enzyme active site. A second cooperative transition, corresponding to global unfolding, is observed at higher denaturant concentrations, with ΔG(0) value of 65 ± 1.4 kJ·mol(-1) These combined data highlight the importance of the two zinc ions in maintaining structure as well as a relatively well defined conformation for both active site loops to maintain enzymatic activity.
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Affiliation(s)
- Caroline Montagner
- From the Laboratoire d'Enzymologie et Repliement des Protéines, Centre d'Ingénierie des Protéines, and
| | - Michaël Nigen
- From the Laboratoire d'Enzymologie et Repliement des Protéines, Centre d'Ingénierie des Protéines, and
| | - Olivier Jacquin
- From the Laboratoire d'Enzymologie et Repliement des Protéines, Centre d'Ingénierie des Protéines, and
| | - Nicolas Willet
- From the Laboratoire d'Enzymologie et Repliement des Protéines, Centre d'Ingénierie des Protéines, and
| | - Mireille Dumoulin
- From the Laboratoire d'Enzymologie et Repliement des Protéines, Centre d'Ingénierie des Protéines, and
| | - Andreas Ioannis Karsisiotis
- the School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester, Essex CO4 3SQ, United Kingdom
| | - Gordon C K Roberts
- the Henry Wellcome Laboratories of Structural Biology, Department of Biochemistry, University of Leicester, Leicester LE1 9HN, United Kingdom, and
| | - Christian Damblon
- Département de Chimie, Université de Liège, Institut de Chimie B6, 4000 Liège (Sart Tilman), Belgium
| | - Christina Redfield
- the Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, United Kingdom
| | - André Matagne
- From the Laboratoire d'Enzymologie et Repliement des Protéines, Centre d'Ingénierie des Protéines, and
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Umene YD, Wong LK, Satoh T, Yamane K, Matsui M, Riley LW, Arakawa Y, Suzuki S. Molecular epidemiological characterization of uropathogenic escherichia coli from an outpatient urology clinic in rural Japan. J Clin Microbiol 2015; 53:681-3. [PMID: 25428151 PMCID: PMC4298499 DOI: 10.1128/jcm.03068-14] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Accepted: 11/18/2014] [Indexed: 02/04/2023] Open
Abstract
In the remote Japanese community of Saku, a rural town in the Nagano Prefecture, a large proportion of outpatient urinary tract infections was caused by well-recognized globally dispersed clonal lineages of uropathogenic Escherichia coli (UPEC). However, most of these strains were drug susceptible, suggesting that factors other than selection pressure account for the clonal spread of drug-susceptible UPEC.
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Affiliation(s)
- Yasuyo D Umene
- UC Berkeley-UC San Francisco Joint Medical Program, Division of Health and Medical Sciences, School of Public Health, University of California, Berkeley, California, USA
| | - Lisa K Wong
- Division of Epidemiology and Biostatistics, School of Public Health, University of California, Berkeley, California, USA
| | | | - Kunikazu Yamane
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan Department of Public Health, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Mari Matsui
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Lee W Riley
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, California, USA
| | - Yoshichika Arakawa
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan Department of Bacteriology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Satowa Suzuki
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan
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Abstract
PURPOSE OF REVIEW Multiresistant Gram-negative infections are an increasing problem in hospitals and healthcare facilities worldwide. While much attention has been paid to Gram-positive pathogens such as methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus lately, the importance of Gram-negative nosocomial infections has also been recognized globally. RECENT FINDINGS Recent reports have described the spread of carbapenemase-producing Klebsiella pneumoniae across North America. In addition, many strains of Pseudomonas and Acinetobacter in Asia are resistant to all known antibiotics. The global epidemiology of multiresistant Gram-negative pathogens seems to vary by continent. There are very few existing agents which can be used for these pathogens and there are limited options on the horizon. This limited therapeutic armamentarium has been an impetus for novel approaches including combination therapies and increased attention to infection control and prevention efforts. SUMMARY Clinicians need to be aware of the rising problem of resistance in nosocomial and community-acquired Gram-negative pathogens. Novel agents are urgently needed to combat these infections and innovative infection control strategies need to be devised to protect our vulnerable patients.
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High-resolution crystal structure of the subclass B3 metallo-beta-lactamase BJP-1: rational basis for substrate specificity and interaction with sulfonamides. Antimicrob Agents Chemother 2010; 54:4343-51. [PMID: 20696874 DOI: 10.1128/aac.00409-10] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Metallo-β-lactamases (MBLs) are important enzymatic factors in resistance to β-lactam antibiotics that show important structural and functional heterogeneity. BJP-1 is a subclass B3 MBL determinant produced by Bradyrhizobium japonicum that exhibits interesting properties. BJP-1, like CAU-1 of Caulobacter vibrioides, overall poorly recognizes β-lactam substrates and shows an unusual substrate profile compared to other MBLs. In order to understand the structural basis of these properties, the crystal structure of BJP-1 was obtained at 1.4-Å resolution. This revealed significant differences in the conformation and locations of the active-site loops, determining a rather narrow active site and the presence of a unique N-terminal helix bearing Phe-31, whose side chain binds in the active site and represents an obstacle for β-lactam substrate binding. In order to probe the potential of sulfonamides (known to inhibit various zinc-dependent enzymes) to bind in the active sites of MBLs, the structure of BJP-1 in complex with 4-nitrobenzenesulfonamide was also obtained (at 1.33-A resolution), thereby revealing the mode of interaction of these molecules in MBLs. Interestingly, sulfonamide binding resulted in the displacement of the side chain of Phe-31 from its hydrophobic binding pocket, where the benzene ring of the molecule is now found. These data further highlight the structural diversity shown by MBLs but also provide interesting insights in the structure-function relationships of these enzymes. More importantly, we provided the first structural observation of MBL interaction with sulfonamides, which might represent an interesting scaffold for the design of MBL inhibitors.
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Rossolini GM, Mantengoli E. Antimicrobial resistance in Europe and its potential impact on empirical therapy. Clin Microbiol Infect 2009; 14 Suppl 6:2-8. [PMID: 19040461 DOI: 10.1111/j.1469-0691.2008.02126.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The problem of microbial drug resistance is a major public health concern, due to its global dimension and alarming magnitude, although the epidemiology of resistance can exhibit remarkable geographical variability and rapid temporal evolution. The major resistance issues overall are those related to methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant enterococci (VRE), Enterobacteriaceae producing extended-spectrum beta-lactamases, and multidrug-resistant Pseudomonas aeruginosa and Acinetobacter baumannii. Europe is not free from any of these issues, although their impact may be significantly different in different countries. MRSA rates are high in several European countries, but seem to have levelled off in some settings. Diffusion of VRE is still irregular. The most alarming resistance trends are those observed for Enterobacteriaceae and the Gram-negative non-fermenters, with a generalized increase in rates of resistance to the most important anti-Gram-negative agents (beta-lactams and fluoroquinolones) and the circulation of strains showing multidrug resistance phenotypes.
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Affiliation(s)
- G M Rossolini
- Department of Molecular Biology, Section of Microbiology, University of Siena, Siena, Italy.
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Tian SF, Chen BY, Chu YZ, Wang S. Prevalence of rectal carriage of extended-spectrum β-lactamase-producingEscherichia coliamong elderly people in community settings in China. Can J Microbiol 2008; 54:781-5. [PMID: 18772941 DOI: 10.1139/w08-059] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The importance of community-acquired infections due to extended-spectrum β-lactamase-producing (ESBL) Escherichia coli has been increasingly recognized in recent years. No comprehensive data are available on the prevalence, risk factors, and genotypes of ESBL production in community residents in China. Rectal samples from 270 elderly people were collected in four communities in Shenyang (China). Colonies were screened by double-disk synergy test for ESBL production and then, ESBLs were characterized by PCR and sequencing. The clonal relatedness of all ESBL-producing isolates was determined by pulsed-field gel electrophoresis. Potential risk factors for rectal carriage of ESBL producers were examined by multivariate analysis. The prevalence of rectal carriage of ESBL-producing E. coli was 7.0%. All 19 ESBL-producing isolates produced CTX-M-type ESBLs, including CTX-M-14 (11 strains), CTX-M-22 (3 strains), CTX-M-79 (3 strains), CTX-M-24 (1 strain), and CTX-M-24 and CTX-M-79 together (1 strain). CTX-M-79 ESBL was first detected worldwide. ESBL-producing strains were clonally unrelated. Appearance of ESBL producers is strongly associated with the use of antibiotics in the past 3 months (odds ratio 3.2, 95% CI 1.1–9.0, P = 0.03). Our results show the importance of the intestinal tract as a reservoir for ESBL-producing isolates in community settings in China and that the use of antibiotics in the past 3 months is clearly linked to rectal carriage of ESBL producers.
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Affiliation(s)
- Su Fei Tian
- Division of Infectious Disease, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
- Department of Laboratory Medicine, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
- Department of General Practice, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
| | - Bai Yi Chen
- Division of Infectious Disease, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
- Department of Laboratory Medicine, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
- Department of General Practice, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
| | - Yun Zhuo Chu
- Division of Infectious Disease, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
- Department of Laboratory Medicine, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
- Department of General Practice, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
| | - Shuang Wang
- Division of Infectious Disease, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
- Department of Laboratory Medicine, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
- Department of General Practice, The First Affiliated Hospital, China Medical University, No. 155, Nanjing Northern Street, Shenyang, Liaoning 110001, China
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Perumal SK, Adediran SA, Pratt RF. Beta-ketophosphonates as beta-lactamase inhibitors: Intramolecular cooperativity between the hydrophobic subsites of a class D beta-lactamase. Bioorg Med Chem 2008; 16:6987-94. [PMID: 18572409 DOI: 10.1016/j.bmc.2008.05.045] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2008] [Revised: 05/20/2008] [Accepted: 05/21/2008] [Indexed: 10/22/2022]
Abstract
A series of aryl and arylmethyl beta-aryl-beta-ketophosphonates have been prepared as potential beta-lactamase inhibitors. These compounds, as fast, reversible, competitive inhibitors, were most effective (micromolar K(i) values) against the class D OXA-1 beta-lactamase but had less activity against the OXA-10 enzyme. They were also quite effective against the class C beta-lactamase of Enterobacter cloacae P99 but less so against the class A TEM-2 enzyme. Reduction of the keto group to form the corresponding beta-hydroxyphosphonates led to reduced inhibitory activity. Molecular modeling, based on the OXA-1 crystal structure, suggested interaction of the aryl groups with the hydrophobic elements of the enzyme's active site and polar interaction of the keto and phosphonate groups with the active site residues Ser 115, Lys 212 and Thr 213 and with the non-conserved Ser 258. Analysis of binding free energies showed that the beta-aryl and phosphonate ester aryl groups interacted cooperatively within the OXA-1 active site. Overall, the results suggest that quite effective inhibitors of class C and some class D beta-lactamases could be designed, based on the beta-ketophosphonate platform.
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Affiliation(s)
- Senthil K Perumal
- Department of Chemistry, Wesleyan University, Middletown, CT 06459, USA
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Morandi S, Morandi F, Caselli E, Shoichet BK, Prati F. Structure-based optimization of cephalothin-analogue boronic acids as beta-lactamase inhibitors. Bioorg Med Chem 2007; 16:1195-205. [PMID: 17997318 DOI: 10.1016/j.bmc.2007.10.075] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2007] [Revised: 10/11/2007] [Accepted: 10/23/2007] [Indexed: 11/25/2022]
Abstract
Boronic acids have proved to be promising selective inhibitors of beta-lactamases, acting as transition state analogues. Starting from a previously described nanomolar inhibitor of AmpC beta-lactamase, three new inhibitors were designed to gain interactions with highly conserved residues, such as Asn343, and to bind more tightly to the enzyme. Among these, one was obtained by stereoselective synthesis and succeeded in placing its anionic group into the carboxylate binding site of the enzyme, as revealed by X-ray crystallography of the complex inhibitor/AmpC. Nevertheless, it failed at improving affinity, when compared to the lead from which it was derived. The origins of this structural and energetic discrepancy are discussed.
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Affiliation(s)
- Stefania Morandi
- Dipartimento di Chimica, Università degli studi di Modena e Reggio Emilia, via Campi 183, 41100 Modena, Italy
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