1
|
Golden M, Post SJ, Rivera R, Wuest WM. Investigating the Role of Metabolism for Antibiotic Combination Therapies in Pseudomonas aeruginosa. ACS Infect Dis 2023; 9:2386-2393. [PMID: 37938982 PMCID: PMC10714402 DOI: 10.1021/acsinfecdis.3c00452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 11/01/2023] [Accepted: 11/02/2023] [Indexed: 11/10/2023]
Abstract
Antibacterial resistance poses a severe threat to public health; an anticipated 14-fold increase in multidrug-resistant (MDR) bacterial infections is expected to occur by 2050. Contrary to antibiotics, combination therapies are the standard of care for antiviral and anticancer treatments, as synergistic drug-drug interactions can decrease dosage and resistance development. In this study, we investigated combination treatments of a novel succinate dehydrogenase inhibitor (promysalin) with specific inhibitors of metabolism and efflux alongside a panel of clinically approved antibiotics in synergy studies. Through these investigations, we determined that promysalin can work synergistically with vancomycin and antagonistically with aminoglycosides and a glyoxylate shunt pathway inhibitor at subinhibitory concentrations; however, these cooperative effects do not reduce minimum inhibitory concentrations. The variability of these results underscores the complexity of targeting metabolism for combination therapies in antibiotic development.
Collapse
Affiliation(s)
- Martina
M. Golden
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Savannah J. Post
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Renata Rivera
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - William M. Wuest
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
- Emory
Antibiotic Resistance Center, Emory School of Medicine, Emory University, Atlanta, Georgia 30322, United States
| |
Collapse
|
2
|
Das S, Pattanayakanahalli Henjarappa K, Mahanta N. Enzymatic reconstitution of salicylate formation in promysalin biosynthesis. Bioorg Med Chem Lett 2023; 94:129440. [PMID: 37567320 DOI: 10.1016/j.bmcl.2023.129440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 08/02/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
Promysalin is an amphipathic antibiotic isolated from Pseudomonas promysalinigenes (previously Pseudomonas putida RW10S1) which shows potent antibacterial activities against Gram-negative pathogens by inactivating succinate dehydrogenase. Based on the in-vivo studies, promysalin is hypothesized to be assembled from three building blocks: salicylic acid, proline, and myristic acid via a proposed but uncharacterized hybrid NRPS-PKS biosynthetic pathway. So far, no in-vitro biosynthetic studies have been reported for this promising antibiotic. Here, we report the first in-vitro reconstitution and biochemical characterization of two early enzymes on the pathway: PpgH, an isochorismate synthase (IS), and PpgG, an isochorismate pyruvate lyase (IPL) which are involved in the biosynthesis of salicylic acid, the polar fragment of promysalin. We also report a secondary chorismate mutase (CM) activity for PpgG. Based on our biochemical experiments, preliminary mechanistic proposals have been postulated for PpgH and PpgG. We believe this study will lay a strong foundation for elucidating the functions and mechanisms of other intriguing enzymes of the promysalin biosynthesis pathway, which may potentially unravel interesting enzyme chemistries and promote pathway engineering in the future.
Collapse
Affiliation(s)
- Simita Das
- Department of Chemistry, Indian Institute of Technology Dharwad, Karnataka 580011, India
| | | | - Nilkamal Mahanta
- Department of Chemistry, Indian Institute of Technology Dharwad, Karnataka 580011, India.
| |
Collapse
|
3
|
Tran TMT, Addison RS, Davis RA, Rehm BHA. Bromotyrosine-Derived Metabolites from a Marine Sponge Inhibit Pseudomonas aeruginosa Biofilms. Int J Mol Sci 2023; 24:10204. [PMID: 37373352 DOI: 10.3390/ijms241210204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/06/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Pseudomonas aeruginosa forms stable biofilms, providing a major barrier for multiple classes of antibiotics and severely impairing treatment of infected patients. The biofilm matrix of this Gram-negative bacterium is primarily composed of three major exopolysaccharides: alginate, Psl, and Pel. Here, we studied the antibiofilm properties of sponge-derived natural products ianthelliformisamines A-C and their combinations with clinically used antibiotics. Wild-type P. aeruginosa strain and its isogenic exopolysaccharide-deficient mutants were employed to determine the interference of the compounds with biofilm matrix components. We identified that ianthelliformisamines A and B worked synergistically with ciprofloxacin to kill planktonic and biofilm cells. Ianthelliformisamines A and B reduced the minimum inhibitory concentration (MIC) of ciprofloxacin to 1/3 and 1/4 MICs, respectively. In contrast, ianthelliformisamine C (MIC = 53.1 µg/mL) alone exhibited bactericidal effects dose-dependently on both free-living and biofilm populations of wild-type PAO1, PAO1ΔpslA (Psl deficient), PDO300 (alginate overproducing and mimicking clinical isolates), and PDO300Δalg8 (alginate deficient). Interestingly, the biofilm of the clinically relevant mucoid variant PDO300 was more susceptible to ianthelliformisamine C than strains with impaired polysaccharide synthesis. Ianthelliformisamines exhibited low cytotoxicity towards HEK293 cells in the resazurin viability assay. Mechanism of action studies showed that ianthelliformisamine C inhibited the efflux pump of P. aeruginosa. Metabolic stability analyses indicated that ianthelliformisamine C is stable and ianthelliformisamines A and B are rapidly degraded. Overall, these findings suggest that the ianthelliformisamine chemotype could be a promising candidate for the treatment of P. aeruginosa biofilms.
Collapse
Affiliation(s)
- Tam M T Tran
- Centre for Cell Factories and Biopolymers, Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD 4111, Australia
| | - Russell S Addison
- Preclinical ADME/PK, Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD 4111, Australia
| | - Rohan A Davis
- NatureBank, Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD 4111, Australia
- School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
| | - Bernd H A Rehm
- Centre for Cell Factories and Biopolymers, Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD 4111, Australia
- Menzies Health Institute Queensland, Griffith University, Gold Coast, QLD 4222, Australia
| |
Collapse
|
4
|
Mahoney A, Storek KM, Wuest WM. Structure-Based Design of Promysalin Analogues to Overcome Mechanisms of Bacterial Resistance. ACS OMEGA 2023; 8:12558-12564. [PMID: 37033834 PMCID: PMC10077553 DOI: 10.1021/acsomega.3c00884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 03/13/2023] [Indexed: 06/19/2023]
Abstract
The search for antibiotics that function through novel mechanisms of action is ongoing, and recent progress in our lab identified the tricarboxylic acid cycle as a viable option. Promysalin is a secondary metabolite capable of species-specific inhibition of Pseudomonas aeruginosa, a common opportunistic pathogen. Promysalin disrupts primary metabolism in this bacterium by competitively inhibiting succinate dehydrogenase at the ubiquinone binding site. However, the activity of promysalin in cellulo is marred potentially by its chemical instability and/or propensity for efflux. To assess the success of these novel analogues, a novel strain of P. aeruginosa harboring gene deletions of eight efflux pumps and porins was developed and implemented. Herein, we disclose the synthesis and biological investigation of six promysalin analogues to overcome these liabilities and demonstrate that efflux likely plays a significant role in tolerating the effect of the inhibitor.
Collapse
Affiliation(s)
- Andrew
R. Mahoney
- Department
of Chemistry, Emory Univers ity, and Emory
Antibiotic Resistance Center, Emory University School of Medicine, Atlanta, Georgia 30322, United States
| | - Kelly M. Storek
- Department
of Infectious Diseases, Genentech, Inc. South San Francisco, California 94080, United States
| | - William M. Wuest
- Department
of Chemistry, Emory Univers ity, and Emory
Antibiotic Resistance Center, Emory University School of Medicine, Atlanta, Georgia 30322, United States
| |
Collapse
|
5
|
Antibacterial, antifungal activities and toxicity of new synthetic fatty acid salicylate esters. Med Chem Res 2023. [DOI: 10.1007/s00044-023-03034-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
|
6
|
Tan X, Massignan L, Hou X, Frey J, Oliveira JCA, Hussain MN, Ackermann L. Rhodaelektrokatalysierte bimetallische C‐H‐Oxygenierung durch schwache
O
‐Koordination. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202017359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Xuefeng Tan
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Leonardo Massignan
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Xiaoyan Hou
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Johanna Frey
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - João C. A. Oliveira
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Masoom Nasiha Hussain
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
- Wöhler Research Institute for Sustainable Chemistry Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| |
Collapse
|
7
|
Tan X, Massignan L, Hou X, Frey J, Oliveira JCA, Hussain MN, Ackermann L. Rhoda-Electrocatalyzed Bimetallic C-H Oxygenation by Weak O-Coordination. Angew Chem Int Ed Engl 2021; 60:13264-13270. [PMID: 33651910 PMCID: PMC8252749 DOI: 10.1002/anie.202017359] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/28/2021] [Indexed: 12/20/2022]
Abstract
Rhodium-electrocatalyzed arene C-H oxygenation by weakly O-coordinating amides and ketones have been established by bimetallic electrocatalysis. Likewise, diverse dihydrooxazinones were selectively accessed by the judicious choice of current, enabling twofold C-H functionalization. Detailed mechanistic studies by experiment, mass spectroscopy and cyclovoltammetric analysis provided support for an unprecedented electrooxidation-induced C-H activation by a bimetallic rhodium catalysis manifold.
Collapse
Affiliation(s)
- Xuefeng Tan
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
| | - Leonardo Massignan
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
| | - Xiaoyan Hou
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
| | - Johanna Frey
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
| | - João C. A. Oliveira
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
| | - Masoom Nasiha Hussain
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
- Wöhler Research Institute for Sustainable ChemistryGeorg-August-Universität GöttingenTammannstraße 237077GöttingenGermany
| |
Collapse
|
8
|
Kaplan AR, Musaev DG, Wuest WM. Pyochelin Biosynthetic Metabolites Bind Iron and Promote Growth in Pseudomonads Demonstrating Siderophore-like Activity. ACS Infect Dis 2021; 7:544-551. [PMID: 33577297 DOI: 10.1021/acsinfecdis.0c00897] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Pseudomonads employ several strategies to sequester iron vital for their survival including the use of siderophores such as pyoverdine and pyochelin. Similar in structure but significantly less studied are pyochelin biosynthetic byproducts, dihydroaeruginoic acid, aeruginoic acid, aeruginaldehyde (IQS), and aeruginol, along with two other structurally related molecules, aerugine and pyonitrins A-D, which have all been isolated from numerous Pseudomonad extracts. Because of the analogous substructure of these compounds to pyochelin, we hypothesized that they may play a role in iron homeostasis or have a biological effect on other bacterial species. Herein, we discuss the physiochemical evaluation of these molecules and disclose, for the first time, their ability to bind iron and promote growth in Pseudomonads.
Collapse
Affiliation(s)
- Anna R. Kaplan
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Djamaladdin G. Musaev
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
- Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
| | - William M. Wuest
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| |
Collapse
|
9
|
Melander RJ, Basak AK, Melander C. Natural products as inspiration for the development of bacterial antibiofilm agents. Nat Prod Rep 2020; 37:1454-1477. [PMID: 32608431 PMCID: PMC7677205 DOI: 10.1039/d0np00022a] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Natural products have historically been a rich source of diverse chemical matter with numerous biological activities, and have played an important role in drug discovery in many areas including infectious disease. Synthetic and medicinal chemistry have been, and continue to be, important tools to realize the potential of natural products as therapeutics and as chemical probes. The formation of biofilms by bacteria in an infection setting is a significant factor in the recalcitrance of many bacterial infections, conferring increased tolerance to many antibiotics and to the host immune response, and as yet there are no approved therapeutics for combatting biofilm-based bacterial infections. Small molecules that interfere with the ability of bacteria to form and maintain biofilms can overcome antibiotic tolerance conferred by the biofilm phenotype, and have the potential to form combination therapies with conventional antibiotics. Many natural products with anti-biofilm activity have been identified from plants, microbes, and marine life, including: elligic acid glycosides, hamamelitannin, carolacton, skyllamycins, promysalin, phenazines, bromoageliferin, flustramine C, meridianin D, and brominated furanones. Total synthesis and medicinal chemistry programs have facilitated structure confirmation, identification of critical structural motifs, better understanding of mechanistic pathways, and the development of more potent, more accessible, or more pharmacologically favorable derivatives of anti-biofilm natural products.
Collapse
Affiliation(s)
- Roberta J Melander
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
| | | | | |
Collapse
|
10
|
Post SJ, Keohane CE, Rossiter LM, Kaplan AR, Khowsathit J, Matuska K, Karanicolas J, Wuest WM. Target-Based Design of Promysalin Analogues Identifies a New Putative Binding Cleft in Succinate Dehydrogenase. ACS Infect Dis 2020; 6:1372-1377. [PMID: 32286041 PMCID: PMC7293565 DOI: 10.1021/acsinfecdis.0c00024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Promysalin is a small-molecule natural product that specifically inhibits growth of the Gram-negative pathogen Pseudomonas aeruginosa (PA). This activity holds promise in the treatment of multidrug resistant infections found in immunocompromised patients with chronic illnesses, such as cystic fibrosis. In 2015, our lab completed the first total synthesis; subsequent analogue design and SAR investigation enabled identification of succinate dehydrogenase (Sdh) as the biological target in PA. Herein, we report the target-guided design of new promysalin analogues with varying alkyl chains, one of which is on par with our most potent analogue to date. Computational docking revealed that some analogues have a different orientation in the Sdh binding pocket, placing the terminal carbon proximal to a tryptophan residue. This inspired the design of an extended side chain analogue bearing a terminal phenyl moiety, providing a basis for the design of future analogues.
Collapse
Affiliation(s)
- Savannah J Post
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Colleen E Keohane
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Lauren M Rossiter
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Anna R Kaplan
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Jittasak Khowsathit
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, United States
| | - Katie Matuska
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - John Karanicolas
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, United States
| | - William M Wuest
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
- Emory Antibiotic Resistance Center, Emory School of Medicine, Emory University, Atlanta, Georgia 30322, United States
| |
Collapse
|
11
|
Abouelhassan Y, Garrison AT, Yang H, Chávez-Riveros A, Burch GM, Huigens RW. Recent Progress in Natural-Product-Inspired Programs Aimed To Address Antibiotic Resistance and Tolerance. J Med Chem 2019; 62:7618-7642. [PMID: 30951303 DOI: 10.1021/acs.jmedchem.9b00370] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bacteria utilize multiple mechanisms that enable them to gain or acquire resistance to antibiotic therapies during the treatment of infections. In addition, bacteria form biofilms which are surface-attached communities of enriched populations containing persister cells encased within a protective extracellular matrix of biomolecules, leading to chronic and recurring antibiotic-tolerant infections. Antibiotic resistance and tolerance are major global problems that require innovative therapeutic strategies to address the challenges associated with pathogenic bacteria. Historically, natural products have played a critical role in bringing new therapies to the clinic to treat life-threatening bacterial infections. This Perspective provides an overview of antibiotic resistance and tolerance and highlights recent advances (chemistry, biology, drug discovery, and development) from various research programs involved in the discovery of new antibacterial agents inspired by a diverse series of natural product antibiotics.
Collapse
Affiliation(s)
- Yasmeen Abouelhassan
- Department of Medicinal Chemistry, Center for Natural Products, Drug Discovery and Development (CNPD3), College of Pharmacy , University of Florida , Gainesville , Florida 32610 , United States
| | - Aaron T Garrison
- Department of Medicinal Chemistry, Center for Natural Products, Drug Discovery and Development (CNPD3), College of Pharmacy , University of Florida , Gainesville , Florida 32610 , United States
| | - Hongfen Yang
- Department of Medicinal Chemistry, Center for Natural Products, Drug Discovery and Development (CNPD3), College of Pharmacy , University of Florida , Gainesville , Florida 32610 , United States
| | - Alejandra Chávez-Riveros
- Department of Medicinal Chemistry, Center for Natural Products, Drug Discovery and Development (CNPD3), College of Pharmacy , University of Florida , Gainesville , Florida 32610 , United States
| | - Gena M Burch
- Department of Medicinal Chemistry, Center for Natural Products, Drug Discovery and Development (CNPD3), College of Pharmacy , University of Florida , Gainesville , Florida 32610 , United States
| | - Robert W Huigens
- Department of Medicinal Chemistry, Center for Natural Products, Drug Discovery and Development (CNPD3), College of Pharmacy , University of Florida , Gainesville , Florida 32610 , United States
| |
Collapse
|
12
|
Abstract
Natural products (NPs) are important sources of clinical drugs due to their structural diversity and biological prevalidation. However, the structural complexity of NPs leads to synthetic difficulties, unfavorable pharmacokinetic profiles, and poor drug-likeness. Structural simplification by truncating unnecessary substructures is a powerful strategy for overcoming these limitations and improving the efficiency and success rate of NP-based drug development. Herein, we will provide a comprehensive review of the structural simplification of NPs with a focus on design strategies, case studies, and new technologies. In particular, a number of successful examples leading to marketed drugs or drug candidates will be discussed in detail to illustrate how structural simplification is applied in lead optimization of NPs.
Collapse
Affiliation(s)
- Shengzheng Wang
- Department of Medicinal Chemistry, School of Pharmacy , Second Military Medical University , 325 Guohe Road , Shanghai , 200433 , P.R. China.,Department of Medicinal Chemistry, School of Pharmacy , Fourth Military Medical University , 169 Changle West Road , Xi'an , 710032 , P.R. China
| | - Guoqiang Dong
- Department of Medicinal Chemistry, School of Pharmacy , Second Military Medical University , 325 Guohe Road , Shanghai , 200433 , P.R. China
| | - Chunquan Sheng
- Department of Medicinal Chemistry, School of Pharmacy , Second Military Medical University , 325 Guohe Road , Shanghai , 200433 , P.R. China
| |
Collapse
|
13
|
Halloran MW, Lumb JP. Recent Applications of Diazirines in Chemical Proteomics. Chemistry 2019; 25:4885-4898. [PMID: 30444029 DOI: 10.1002/chem.201805004] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/12/2018] [Indexed: 02/06/2023]
Abstract
The elucidation of substrate-protein interactions is an important component of the drug development process. Due to the complexity of native cellular environments, elucidating these fundamental biochemical interactions remains challenging. Photoaffinity labeling (PAL) is a versatile technique that can provide insight into ligand-target interactions. By judicious modification of substrates with a photoreactive group, PAL creates a covalent crosslink between a substrate and its biological target following UV-irradiation. Among the commonly employed photoreactive groups, diazirines have emerged as the gold standard. In this Minireview, recent developments in the field of diazirine-based photoaffinity labeling will be discussed, with emphasis being placed on their applications in chemical proteomic studies.
Collapse
Affiliation(s)
- Matthew W Halloran
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada
| | - Jean-Philip Lumb
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada
| |
Collapse
|
14
|
Lakemeyer M, Zhao W, Mandl FA, Hammann P, Sieber SA. Thinking Outside the Box-Novel Antibacterials To Tackle the Resistance Crisis. Angew Chem Int Ed Engl 2018; 57:14440-14475. [PMID: 29939462 DOI: 10.1002/anie.201804971] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Indexed: 12/13/2022]
Abstract
The public view on antibiotics as reliable medicines changed when reports about "resistant superbugs" appeared in the news. While reasons for this resistance development are easily spotted, solutions for re-establishing effective antibiotics are still in their infancy. This Review encompasses several aspects of the antibiotic development pipeline from very early strategies to mature drugs. An interdisciplinary overview is given of methods suitable for mining novel antibiotics and strategies discussed to unravel their modes of action. Select examples of antibiotics recently identified by using these platforms not only illustrate the efficiency of these measures, but also highlight promising clinical candidates with therapeutic potential. Furthermore, the concept of molecules that disarm pathogens by addressing gatekeepers of virulence will be covered. The Review concludes with an evaluation of antibacterials currently in clinical development. Overall, this Review aims to connect select innovative antimicrobial approaches to stimulate interdisciplinary partnerships between chemists from academia and industry.
Collapse
Affiliation(s)
- Markus Lakemeyer
- Department of Chemistry, Chair of Organic Chemistry II, Center for Integrated Protein Science (CIPSM), Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Weining Zhao
- Department of Chemistry, Chair of Organic Chemistry II, Center for Integrated Protein Science (CIPSM), Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Franziska A Mandl
- Department of Chemistry, Chair of Organic Chemistry II, Center for Integrated Protein Science (CIPSM), Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Peter Hammann
- R&D Therapeutic Area Infectious Diseases, Sanofi-Aventis (Deutschland) GmbH, Industriepark Höchst, 65926, Frankfurt am Main, Germany
| | - Stephan A Sieber
- Department of Chemistry, Chair of Organic Chemistry II, Center for Integrated Protein Science (CIPSM), Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| |
Collapse
|
15
|
Lakemeyer M, Zhao W, Mandl FA, Hammann P, Sieber SA. Über bisherige Denkweisen hinaus - neue Wirkstoffe zur Überwindung der Antibiotika-Krise. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804971] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Markus Lakemeyer
- Fakultät für Chemie; Lehrstuhl für Organische Chemie II, Center for Integrated Protein Science (CIPSM); Technische Universität München; Lichtenbergstraße 4 85747 Garching Deutschland
| | - Weining Zhao
- Fakultät für Chemie; Lehrstuhl für Organische Chemie II, Center for Integrated Protein Science (CIPSM); Technische Universität München; Lichtenbergstraße 4 85747 Garching Deutschland
| | - Franziska A. Mandl
- Fakultät für Chemie; Lehrstuhl für Organische Chemie II, Center for Integrated Protein Science (CIPSM); Technische Universität München; Lichtenbergstraße 4 85747 Garching Deutschland
| | - Peter Hammann
- R&D Therapeutic Area Infectious Diseases; Sanofi-Aventis (Deutschland) GmbH; Industriepark Höchst 65926 Frankfurt am Main Deutschland
| | - Stephan A. Sieber
- Fakultät für Chemie; Lehrstuhl für Organische Chemie II, Center for Integrated Protein Science (CIPSM); Technische Universität München; Lichtenbergstraße 4 85747 Garching Deutschland
| |
Collapse
|
16
|
Shapiro JA, Kaplan AR, Wuest WM. From General to Specific: Can Pseudomonas Primary Metabolism Be Exploited for Narrow-Spectrum Antibiotics? Chembiochem 2018; 20:34-39. [PMID: 30088315 DOI: 10.1002/cbic.201800383] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Indexed: 12/16/2022]
Abstract
The spread of antimicrobial resistance is a major threat to human health, and patients requiring prolonged antibiotic exposure are in desperate need of new therapeutic strategies. It has been hypothesized that tailoring our antibiotics to inhibit molecular targets specific to pathogens might stem the spread of resistance. A prime candidate for such a strategy is Pseudomonas aeruginosa, which can be found in the lungs of nearly all adult cystic fibrosis patients and, due to chronic exposure to antibiotics, has a high rate of multidrug-resistant strains. Although much research has been done on P. aeruginosa virulence factors as narrow-spectrum targets, less attention has been paid to primary carbon metabolism being leveraged for pathogen-specific mechanisms. However, early studies show that primary metabolic pathways, although shared amongst all organisms, contain intricacies specific to Pseudomonas species that have potential for antibiotic exploitation. Here we lay out some of this work in the hopes that it inspires researchers to continue developing a knowledge base for future antibiotic discovery to build upon and include a case study of a Pseudomonas primary metabolic pathway that has been targeted by small molecules in a species-specific manner.
Collapse
Affiliation(s)
- Justin A Shapiro
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, 30322, USA
| | - Anna R Kaplan
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, 30322, USA
| | - William M Wuest
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, 30322, USA
| |
Collapse
|
17
|
Giglio KM, Keohane CE, Stodghill PV, Steele AD, Fetzer C, Sieber SA, Filiatrault MJ, Wuest WM. Transcriptomic Profiling Suggests That Promysalin Alters the Metabolic Flux, Motility, and Iron Regulation in Pseudomonas putida KT2440. ACS Infect Dis 2018; 4:1179-1187. [PMID: 29801413 DOI: 10.1021/acsinfecdis.8b00041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Promysalin, a secondary metabolite produced by P. putida RW10S1, is a narrow-spectrum antibiotic that targets P. aeruginosa over other Pseudomonas spp. P. putida KT2440, a nonproducing strain, displays increased swarming motility and decreased pyoverdine production in the presence of exogenous promysalin. Herein, proteomic and transcriptomic experiments were used to provide insight about how promysalin elicits responses in PPKT2440 and rationalize its species selectivity. RNA-sequencing results suggest that promysalin affects PPKT2440 by (1) increasing swarming in a flagella-independent manner; (2) causing cells to behave as if they were experiencing an iron-deficient environment, and (3) shifting metabolism away from glucose conversion to pyruvate via the Entner-Doudoroff pathway. These findings highlight nature's ability to develop small molecules with specific targets, resulting in exquisite selectivity.
Collapse
Affiliation(s)
- Krista M. Giglio
- Emerging Pests and Pathogens
Research, United States Department of Agriculture, Agricultural Research
Service, 538 Tower Road, Ithaca, New York 14853, United States
| | - Colleen E. Keohane
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Paul V. Stodghill
- Emerging Pests and Pathogens
Research, United States Department of Agriculture, Agricultural Research
Service, 538 Tower Road, Ithaca, New York 14853, United States
| | - Andrew D. Steele
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Christian Fetzer
- Department of Chemistry, Center for Integrated Protein Science Munich (CIPSM), Technische Universität München, Lichtenbergstraße 4, 85747 Garching, Germany
| | - Stephan A. Sieber
- Department of Chemistry, Center for Integrated Protein Science Munich (CIPSM), Technische Universität München, Lichtenbergstraße 4, 85747 Garching, Germany
| | - Melanie J. Filiatrault
- Emerging Pests and Pathogens
Research, United States Department of Agriculture, Agricultural Research
Service, 538 Tower Road, Ithaca, New York 14853, United States
- School of Integrative Plant Science, Plant Pathology and Plant-Microbe Biology Section, Cornell University, 236 Tower Road, Ithaca, New York 14853, United States
| | - William M. Wuest
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
- Emory Antibiotic Resistance Center, Emory University, 201 Dowman Drive, Atlanta, Georgia 30322, United States
| |
Collapse
|
18
|
Davis FA. Recent applications of N-sulfonyloxaziridines (Davis oxaziridines) in organic synthesis. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.02.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
19
|
Steele AD, Ernouf G, Lee YE, Wuest WM. Diverted Total Synthesis of the Baulamycins and Analogues Reveals an Alternate Mechanism of Action. Org Lett 2018; 20:1126-1129. [PMID: 29388431 PMCID: PMC5869691 DOI: 10.1021/acs.orglett.8b00054] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The baulamycins were identified as in vitro siderophore biosynthesis inhibitors. Diverted total synthesis was used to construct the natural products and eight strategic analogues, three of which had improved inhibitory activity. Biological testing then revealed that membrane damage is the predominant mode of action in Staphylococcus aureus cells.
Collapse
Affiliation(s)
- Andrew D. Steele
- Department of Chemistry, Emory University, 1515 Dickey Drive Atlanta, Georgia 30322, United States
| | - Guillaume Ernouf
- Department of Chemistry, Emory University, 1515 Dickey Drive Atlanta, Georgia 30322, United States
| | - Young Eun Lee
- Department of Chemistry, Temple University, 1901 North 13th Street Philadelphia, Pennsylvania 19122, United States
| | - William M. Wuest
- Department of Chemistry, Emory University, 1515 Dickey Drive Atlanta, Georgia 30322, United States
| |
Collapse
|
20
|
Keohane CE, Steele AD, Fetzer C, Khowsathit J, Tyne DV, Moynié L, Gilmore MS, Karanicolas J, Sieber SA, Wuest WM. Promysalin Elicits Species-Selective Inhibition of Pseudomonas aeruginosa by Targeting Succinate Dehydrogenase. J Am Chem Soc 2018; 140:1774-1782. [PMID: 29300464 PMCID: PMC5869686 DOI: 10.1021/jacs.7b11212] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Natural products have served as an inspiration to scientists both for their complex three-dimensional architecture and exquisite biological activity. Promysalin is one such Pseudomonad secondary metabolite that exhibits narrow-spectrum antibacterial activity, originally isolated from the rhizosphere. We herein utilize affinity-based protein profiling (AfBPP) to identify succinate dehydrogenase (Sdh) as the biological target of the natural product. The target was further validated in silico, in vitro, in vivo, and through the selection, and sequencing, of a resistant mutant. Succinate dehydrogenase plays an essential role in primary metabolism of Pseudomonas aeruginosa as the only enzyme that is involved both in the tricarboxylic acid cycle (TCA) and in respiration via the electron transport chain. These findings add credence to other studies that suggest that the TCA cycle is an understudied target in the development of novel therapeutics to combat P. aeruginosa, a significant pathogen in clinical settings.
Collapse
Affiliation(s)
- Colleen E. Keohane
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Andrew D. Steele
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Christian Fetzer
- Department of Chemistry, Center for Integrated Protein Science Munich (CIPSM), Technische Universität München, Lichtenbergstraße 4, 85747 Garching, Germany
| | - Jittasak Khowsathit
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, United States
- Department of Molecular Biosciences, University of Kansas, Lawrence, Kansas 66045, United States
| | - Daria Van Tyne
- Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts 02115, United States
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Lucile Moynié
- Division of Structural Biology, The University of Oxford, Headington Oxford, OX3 7BN, United Kingdom
- Biomedical Sciences Research Complex, University of St. Andrews, Fife Scotland, KY16 9ST, United Kingdom
| | - Michael S. Gilmore
- Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts 02115, United States
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - John Karanicolas
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, United States
| | - Stephan A. Sieber
- Department of Chemistry, Center for Integrated Protein Science Munich (CIPSM), Technische Universität München, Lichtenbergstraße 4, 85747 Garching, Germany
| | - William M. Wuest
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| |
Collapse
|
21
|
Bilitewski U, Blodgett JAV, Duhme-Klair AK, Dallavalle S, Laschat S, Routledge A, Schobert R. Chemical and Biological Aspects of Nutritional Immunity-Perspectives for New Anti-Infectives that Target Iron Uptake Systems. Angew Chem Int Ed Engl 2017; 56:14360-14382. [PMID: 28439959 DOI: 10.1002/anie.201701586] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Indexed: 12/22/2022]
Abstract
Upon bacterial infection, one of the defense mechanisms of the host is the withdrawal of essential metal ions, in particular iron, which leads to "nutritional immunity". However, bacteria have evolved strategies to overcome iron starvation, for example, by stealing iron from the host or other bacteria through specific iron chelators with high binding affinity. Fortunately, these complex interactions between the host and pathogen that lead to metal homeostasis provide several opportunities for interception and, thus, allow the development of novel antibacterial compounds. This Review focuses on iron, discusses recent highlights, and gives some future perspectives which are relevant in the fight against antibiotic resistance.
Collapse
Affiliation(s)
- Ursula Bilitewski
- AG Compound Profiling and Screening, Helmholtz Zentrum für Infektionsforschung, Inhoffenstrasse 7, 38124, Braunschweig, Germany
| | - Joshua A V Blodgett
- Department of Biology, Washington University, St. Louis, MO, 63130-4899, USA
| | | | - Sabrina Dallavalle
- Department of Food, Environmental and Nutritional Sciences, Università degli Studi di Milano, I-20133, Milano, Italy
| | - Sabine Laschat
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 7, 0569, Stuttgart, Germany
| | - Anne Routledge
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Rainer Schobert
- Organische Chemie I, Universität Bayreuth, Universitätsstrasse 30, 95447, Bayreuth, Germany
| |
Collapse
|
22
|
Abstract
Natural products have served as powerful therapeutics against pathogenic bacteria since the golden age of antibiotics of the mid-20th century. However, the increasing frequency of antibiotic-resistant infections clearly demonstrates that new antibiotics are critical for modern medicine. Because combinatorial approaches have not yielded effective drugs, we propose that the development of new antibiotics around proven natural scaffolds is the best short-term solution to the rising crisis of antibiotic resistance. We analyze herein synthetic approaches aiming to reengineer natural products into potent antibiotics. Furthermore, we discuss approaches in modulating quorum sensing and biofilm formation as a nonlethal method, as well as narrow-spectrum pathogen-specific antibiotics, which are of interest given new insights into the implications of disrupting the microbiome.
Collapse
Affiliation(s)
- Sean E. Rossiter
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Madison H. Fletcher
- Department of Chemistry, Temple University, 1901 North 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - William M. Wuest
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| |
Collapse
|
23
|
Bilitewski U, Blodgett JAV, Duhme-Klair AK, Dallavalle S, Laschat S, Routledge A, Schobert R. Chemische und biologische Aspekte von “Nutritional Immunity” - Perspektiven für neue Antiinfektiva mit Fokus auf bakterielle Eisenaufnahmesysteme. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701586] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ursula Bilitewski
- AG Compound Profiling and Screening; Helmholtz-Zentrum für Infektionsforschung; Inhoffenstraße 7 38124 Braunschweig Deutschland
| | | | | | - Sabrina Dallavalle
- Department of Food, Environmental and Nutritional Sciences; Università degli Studi di Milano; I-20133 Milano Italien
| | - Sabine Laschat
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55, 7 0569 Stuttgart Deutschland
| | - Anne Routledge
- Department of Chemistry; University of York, Heslington; York YO10 5DD Großbritannien
| | - Rainer Schobert
- Organische Chemie I; Universität Bayreuth; Universitätsstraße 30 95447 Bayreuth Deutschland
| |
Collapse
|
24
|
Kaduskar RD, Scala GD, Al Jabri ZJH, Arioli S, Musso L, Oggioni MR, Dallavalle S, Mora D. Promysalin is a salicylate-containing antimicrobial with a cell-membrane-disrupting mechanism of action on Gram-positive bacteria. Sci Rep 2017; 7:8861. [PMID: 28821717 PMCID: PMC5562885 DOI: 10.1038/s41598-017-07567-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 06/28/2017] [Indexed: 11/16/2022] Open
Abstract
Promysalin was previously described as a narrow spectrum molecule with a unique species-specific activity against Pseudomonas aeruginosa. Here we demonstrate that promysalin is active against Gram-positive and Gram-negative bacteria using a microdilution assay. Promysalin acts on Gram-positive bacteria with a mechanism of action involving cell membrane damage with leakage of intracellular components. The evaluation of MICs and MBCs on 11 promysalin analogs, synthesized utilizing diverted total synthesis, allowed the identification of the structural moieties potentially involved in cell membrane interaction and damage. The mechanism of action of promysalin against Gram-negative bacteria is still not clarified, even if a synergistic effect with the bisguanidine chlorhexidine on cell membrane disruption has been observed.
Collapse
Affiliation(s)
- Rahul D Kaduskar
- Department of Food, Environmental, and Nutritional Sciences (DeFENS), University of Milan, via Celoria 2, 20133, Milan, Italy
| | - Giulia Della Scala
- Department of Food, Environmental, and Nutritional Sciences (DeFENS), University of Milan, via Celoria 2, 20133, Milan, Italy
| | - Zaaima J H Al Jabri
- Department of Genetics, University of Leicester, University Road, Leicester, LE1 7RH, United Kingdom
| | - Stefania Arioli
- Department of Food, Environmental, and Nutritional Sciences (DeFENS), University of Milan, via Celoria 2, 20133, Milan, Italy
| | - Loana Musso
- Department of Food, Environmental, and Nutritional Sciences (DeFENS), University of Milan, via Celoria 2, 20133, Milan, Italy
| | - Marco R Oggioni
- Department of Genetics, University of Leicester, University Road, Leicester, LE1 7RH, United Kingdom
| | - Sabrina Dallavalle
- Department of Food, Environmental, and Nutritional Sciences (DeFENS), University of Milan, via Celoria 2, 20133, Milan, Italy
| | - Diego Mora
- Department of Food, Environmental, and Nutritional Sciences (DeFENS), University of Milan, via Celoria 2, 20133, Milan, Italy.
| |
Collapse
|
25
|
Masschelein J, Jenner M, Challis GL. Antibiotics from Gram-negative bacteria: a comprehensive overview and selected biosynthetic highlights. Nat Prod Rep 2017. [PMID: 28650032 DOI: 10.1039/c7np00010c] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Covering: up to 2017The overwhelming majority of antibiotics in clinical use originate from Gram-positive Actinobacteria. In recent years, however, Gram-negative bacteria have become increasingly recognised as a rich yet underexplored source of novel antimicrobials, with the potential to combat the looming health threat posed by antibiotic resistance. In this article, we have compiled a comprehensive list of natural products with antimicrobial activity from Gram-negative bacteria, including information on their biosynthetic origin(s) and molecular target(s), where known. We also provide a detailed discussion of several unusual pathways for antibiotic biosynthesis in Gram-negative bacteria, serving to highlight the exceptional biocatalytic repertoire of this group of microorganisms.
Collapse
Affiliation(s)
- J Masschelein
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK.
| | - M Jenner
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK.
| | - G L Challis
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK.
| |
Collapse
|
26
|
Zhang S, Ullah A, Yamamoto Y, Bao M. Palladium-Catalyzed Regioselective Allylation of Chloromethyl(hetero)arenes with Allyl Pinacolborate. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700350] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sheng Zhang
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; Dalian 116023 People's Republic of China
| | - Aziz Ullah
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; Dalian 116023 People's Republic of China
| | - Yoshinori Yamamoto
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; Dalian 116023 People's Republic of China
- WPI-AIMR (WPI-Advanced Institute for Materials Research); Tohoku University; Sendai 980-8577 Japan
| | - Ming Bao
- State Key Laboratory of Fine Chemicals; Dalian University of Technology; Dalian 116023 People's Republic of China
| |
Collapse
|
27
|
The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2015. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
28
|
Maxson T, Mitchell DA. Targeted Treatment for Bacterial Infections: Prospects for Pathogen-Specific Antibiotics Coupled with Rapid Diagnostics. Tetrahedron 2016; 72:3609-3624. [PMID: 27429480 PMCID: PMC4941824 DOI: 10.1016/j.tet.2015.09.069] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Antibiotics are a cornerstone of modern medicine and have significantly reduced the burden of infectious diseases. However, commonly used broad-spectrum antibiotics can cause major collateral damage to the human microbiome, causing complications ranging from antibiotic-associated colitis to the rapid spread of resistance. Employing narrower spectrum antibiotics targeting specific pathogens may alleviate this predicament as well as provide additional tools to expand an antibiotic repertoire threatened by the inevitability of resistance. Improvements in clinical diagnosis will be required to effectively utilize pathogen-specific antibiotics and new molecular diagnostics are poised to fulfill this need. Here we review recent trends and the future prospects of deploying narrower spectrum antibiotics coupled with rapid diagnostics. Further, we discuss the theoretical advantages and limitations of this emerging approach to controlling bacterial infectious diseases.
Collapse
Affiliation(s)
- Tucker Maxson
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Douglas A. Mitchell
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Department of Microbiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Carle R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| |
Collapse
|
29
|
Steele AD, Keohane CE, Knouse KW, Rossiter SE, Williams SJ, Wuest WM. Diverted Total Synthesis of Promysalin Analogs Demonstrates That an Iron-Binding Motif Is Responsible for Its Narrow-Spectrum Antibacterial Activity. J Am Chem Soc 2016; 138:5833-6. [PMID: 27096543 PMCID: PMC5084090 DOI: 10.1021/jacs.6b03373] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Promysalin is a species-specific Pseudomonad metabolite with unique bioactivity. To better understand the mode of action of this natural product, we synthesized 16 analogs utilizing diverted total synthesis (DTS). Our analog studies revealed that the bioactivity of promysalin is sensitive to changes within its hydrogen bond network whereby alteration has drastic biological consequences. The DTS library not only yielded three analogs that retained potency but also provided insights that resulted in the identification of a previously unknown ability of promysalin to bind iron. These findings coupled with previous observations hint at a complex multifaceted role of the natural product within the rhizosphere.
Collapse
Affiliation(s)
- Andrew D. Steele
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Colleen E. Keohane
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Kyle W. Knouse
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Sean E. Rossiter
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Sierra J. Williams
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - William M. Wuest
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| |
Collapse
|
30
|
|
31
|
Knouse KW, Wuest WM. The enantioselective synthesis and biological evaluation of chimeric promysalin analogs facilitated by diverted total synthesis. J Antibiot (Tokyo) 2016; 69:337-9. [DOI: 10.1038/ja.2016.4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 01/12/2016] [Accepted: 01/14/2016] [Indexed: 11/09/2022]
|
32
|
Going beyond the Control of Quorum-Sensing to Combat Biofilm Infections. Antibiotics (Basel) 2016; 5:antibiotics5010003. [PMID: 27025518 PMCID: PMC4810405 DOI: 10.3390/antibiotics5010003] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 11/27/2015] [Accepted: 12/30/2015] [Indexed: 11/17/2022] Open
Abstract
Most bacteria attach to surfaces where they form a biofilm, cells embedded in a complex matrix of polymers. Cells in biofilms are much better protected against noxious agents than free-living cells. As a consequence it is very difficult to control pathogens with antibiotics in biofilm infections and novel targets are urgently needed. One approach aims at the communication between cells to form and to maintain a biofilm, a process called quorum-sensing. Water soluble small-sized molecules mediate this process and a number of antagonists of these compounds have been found. In this review natural compounds and synthetic drugs which do not interfere with the classical quorum-sensing compounds are discussed. For some of these compounds the targets are still not known, but others interfere with the formation of exopolysaccharides, virulence factors, or cell wall synthesis or they start an internal program of biofilm dispersal. Some of their targets are more conserved among pathogens than the receptors for quorum sensing autoinducers mediating quorum-sensing, enabling a broader application of the drug. The broad spectrum of mechanisms, the diversity of bioactive compounds, their activity against several targets, and the conservation of some targets among bacterial pathogens are promising aspects for several clinical applications of this type of biofilm-controlling compound in the future.
Collapse
|