1
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Hanessian S. My 50-Plus Years of Academic Research Collaborations with Industry. A Retrospective. J Org Chem 2024. [PMID: 38865159 DOI: 10.1021/acs.joc.4c00652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
A retrospective is presented highlighting the synthesis of selected "first-in-kind" natural products, their synthetic analogues, structure elucidations, and rationally designed bioactive synthetic compounds that were accomplished because of collaborations with past and present pharmaceutical and agrochemical companies. Medicinal chemistry projects involving structure-based design exploiting cocrystal structures of small molecules with biologically relevant enzymes, receptors, and bacterial ribosomes with synthetic small molecules leading to marketed products, clinical candidates, and novel drug prototypes were realized in collaboration. Personal reflections, historical insights, behind the scenes stories from various long-term projects are shared in this retrospective article.
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Affiliation(s)
- Stephen Hanessian
- Department of Chemistry, Université de Montréal, P.O. Box 6128, Succ. Centre-ville, Montréal, Québec, Canada H3C 3J7
- Department of Pharmaceutical Sciences, University of California, Irvine, California 91266, United States
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2
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Ezelarab HAA, Abbas SH, Hassan HA, Abuo-Rahma GEDA. Recent updates of fluoroquinolones as antibacterial agents. Arch Pharm (Weinheim) 2018; 351:e1800141. [DOI: 10.1002/ardp.201800141] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 06/28/2018] [Accepted: 06/29/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Hend A. A. Ezelarab
- Faculty of Pharmacy, Department of Medicinal Chemistry; Minia University; Minia Egypt
| | - Samar H. Abbas
- Faculty of Pharmacy, Department of Medicinal Chemistry; Minia University; Minia Egypt
| | - Heba A. Hassan
- Faculty of Pharmacy, Department of Medicinal Chemistry; Minia University; Minia Egypt
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3
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Thamban Chandrika N, Garneau-Tsodikova S. Comprehensive review of chemical strategies for the preparation of new aminoglycosides and their biological activities. Chem Soc Rev 2018; 47:1189-1249. [PMID: 29296992 PMCID: PMC5818290 DOI: 10.1039/c7cs00407a] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A systematic analysis of all synthetic and chemoenzymatic methodologies for the preparation of aminoglycosides for a variety of applications (therapeutic and agricultural) reported in the scientific literature up to 2017 is presented. This comprehensive analysis of derivatization/generation of novel aminoglycosides and their conjugates is divided based on the types of modifications used to make the new derivatives. Both the chemical strategies utilized and the biological results observed are covered. Structure-activity relationships based on different synthetic modifications along with their implications for activity and ability to avoid resistance against different microorganisms are also presented.
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Affiliation(s)
- Nishad Thamban Chandrika
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536-0596, USA.
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4
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Domalaon R, Yang X, Lyu Y, Zhanel GG, Schweizer F. Polymyxin B 3-Tobramycin Hybrids with Pseudomonas aeruginosa-Selective Antibacterial Activity and Strong Potentiation of Rifampicin, Minocycline, and Vancomycin. ACS Infect Dis 2017; 3:941-954. [PMID: 29045123 DOI: 10.1021/acsinfecdis.7b00145] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
There is an urgent need to develop novel antibacterial agents able to eradicate drug-resistant Gram-negative pathogens such as Pseudomonas aeruginosa. Antimicrobial hybrids have emerged as a promising strategy to combat bacterial resistance, as a stand-alone drug but also as an adjuvant in combination with existing antibiotics. Herein, we report for the first time the synthesis and biological evaluation of polymyxin-aminoglycoside heterodimers composed of polymyxin B3 covalently linked to tobramycin via an aliphatic hydrocarbon linker. The polymyxin B3-tobramycin hybrids demonstrate potent activity against carbapenem-resistant as well as multidrug- or extensively drug-resistant (MDR/XDR) P. aeruginosa clinical isolates. Furthermore, the most potent hybrid was able to synergize with currently used antibiotics against wild-type and MDR/XDR P. aeruginosa but also against Acinetobacter baumannii as well. The promising biological activity described herein warrants additional studies into design and development of new antimicrobial hybrids able to surmount the problem of antimicrobial resistance.
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Affiliation(s)
- Ronald Domalaon
- Department
of Chemistry, Faculty of Science, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
| | - Xuan Yang
- Department
of Chemistry, Faculty of Science, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
| | - Yinfeng Lyu
- Department
of Chemistry, Faculty of Science, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
- Institute
of Animal Nutrition, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - George G. Zhanel
- Department
of Medical Microbiology and Infectious Diseases, Rady Faculty of Health
Sciences, University of Manitoba, 727 McDermot Avenue, Winnipeg, Manitoba R3T 1R9, Canada
| | - Frank Schweizer
- Department
of Chemistry, Faculty of Science, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
- Department
of Medical Microbiology and Infectious Diseases, Rady Faculty of Health
Sciences, University of Manitoba, 727 McDermot Avenue, Winnipeg, Manitoba R3T 1R9, Canada
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5
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Lyu Y, Yang X, Goswami S, Gorityala BK, Idowu T, Domalaon R, Zhanel GG, Shan A, Schweizer F. Amphiphilic Tobramycin-Lysine Conjugates Sensitize Multidrug Resistant Gram-Negative Bacteria to Rifampicin and Minocycline. J Med Chem 2017; 60:3684-3702. [PMID: 28409644 DOI: 10.1021/acs.jmedchem.6b01742] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Chromosomally encoded low membrane permeability and highly efficient efflux systems are major mechanisms by which Pseudomonas aeruginosa evades antibiotic actions. Our previous reports have shown that amphiphilic tobramycin-fluoroquinolone hybrids can enhance efficacy of fluoroquinolone antibiotics against multidrug-resistant (MDR) P. aeruginosa isolates. Herein, we report on a novel class of tobramycin-lysine conjugates containing an optimized amphiphilic tobramycin-C12 tether that sensitize Gram-negative bacteria to legacy antibiotics. Combination studies indicate the ability of these conjugates to synergize rifampicin and minocycline against MDR and extensively drug resistant (XDR) P. aeruginosa isolates and enhance efficacy of both antibiotics in the Galleria mellonella larvae in vivo infection model. Mode of action studies indicate that the amphiphilic tobramycin-lysine adjuvants enhance outer membrane cell penetration and affect the proton motive force, which energizes efflux pumps. Overall, this study provides a strategy for generating effective antibiotic adjuvants that overcome resistance of rifampicin and minocycline in MDR and XDR Gram-negative bacteria including P. aeruginosa.
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Affiliation(s)
- Yinfeng Lyu
- Institute of Animal Nutrition, Northeast Agricultural University , Harbin, Heilongjiang 150030, P.R. China.,Department of Chemistry, University of Manitoba , Winnipeg, MB R3T 2N2, Canada
| | - Xuan Yang
- Department of Chemistry, University of Manitoba , Winnipeg, MB R3T 2N2, Canada
| | - Sudeep Goswami
- Department of Chemistry, University of Manitoba , Winnipeg, MB R3T 2N2, Canada
| | | | - Temilolu Idowu
- Department of Chemistry, University of Manitoba , Winnipeg, MB R3T 2N2, Canada
| | - Ronald Domalaon
- Department of Chemistry, University of Manitoba , Winnipeg, MB R3T 2N2, Canada
| | - George G Zhanel
- Department of Medical Microbiology/Infectious Diseases, University of Manitoba , Winnipeg, MB R3T 1R9, Canada
| | - Anshan Shan
- Institute of Animal Nutrition, Northeast Agricultural University , Harbin, Heilongjiang 150030, P.R. China
| | - Frank Schweizer
- Department of Chemistry, University of Manitoba , Winnipeg, MB R3T 2N2, Canada.,Department of Medical Microbiology/Infectious Diseases, University of Manitoba , Winnipeg, MB R3T 1R9, Canada
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6
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Covalently linked kanamycin - Ciprofloxacin hybrid antibiotics as a tool to fight bacterial resistance. Bioorg Med Chem 2017; 25:2917-2925. [PMID: 28343755 DOI: 10.1016/j.bmc.2017.02.068] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Accepted: 02/03/2017] [Indexed: 01/21/2023]
Abstract
To address the growing problem of antibiotic resistance, a set of 12 hybrid compounds that covalently link fluoroquinolone (ciprofloxacin) and aminoglycoside (kanamycin A) antibiotics were synthesized, and their activity was determined against both Gram-negative and Gram-positive bacteria, including resistant strains. The hybrids were antagonistic relative to the ciprofloxacin, but were substantially more potent than the parent kanamycin against Gram-negative bacteria, and overcame most dominant resistance mechanisms to aminoglycosides. Selected hybrids were 42-640 fold poorer inhibitors of bacterial protein synthesis than the parent kanamycin, while they displayed similar inhibitory activity to that of ciprofloxacin against DNA gyrase and topoisomerase IV enzymes. The hybrids showed significant delay of resistance development in both E. coli and B. subtilis in comparison to that of component drugs alone or their 1:1 mixture. More generally, the data suggest that an antagonistic combination of aminoglycoside-fluoroquinolone hybrids can lead to new compounds that slowdown/prevent the emergence of resistance.
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7
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Deshayes S, Xian W, Schmidt NW, Kordbacheh S, Lieng J, Wang J, Zarmer S, Germain SS, Voyen L, Thulin J, Wong GCL, Kasko AM. Designing Hybrid Antibiotic Peptide Conjugates To Cross Bacterial Membranes. Bioconjug Chem 2017; 28:793-804. [DOI: 10.1021/acs.bioconjchem.6b00725] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
| | | | - Nathan W. Schmidt
- Department
of Pharmaceutical Chemistry, University of California, San Francisco, 555 Mission Bay Boulevard South, San Francisco, California 94158, United States
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8
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Hayashi M. Progress of Chiral Schiff Bases withC1Symmetry in Metal-Catalyzed Asymmetric Reactions. CHEM REC 2016; 16:2708-2735. [DOI: 10.1002/tcr.201600091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Indexed: 01/19/2023]
Affiliation(s)
- Masahiko Hayashi
- Department of Chemistry Graduate School of Science; Kobe University; Nada Kobe 657-8501 Japan
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9
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Gorityala BK, Guchhait G, Goswami S, Fernando DM, Kumar A, Zhanel GG, Schweizer F. Hybrid Antibiotic Overcomes Resistance in P. aeruginosa by Enhancing Outer Membrane Penetration and Reducing Efflux. J Med Chem 2016; 59:8441-55. [DOI: 10.1021/acs.jmedchem.6b00867] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Bala Kishan Gorityala
- Department
of Chemistry, University of Manitoba, 144 Dysart Road, 450 Parker Building, Winnipeg, Manitoba R3T 2N2, Canada
| | - Goutam Guchhait
- Department
of Chemistry, University of Manitoba, 144 Dysart Road, 450 Parker Building, Winnipeg, Manitoba R3T 2N2, Canada
| | - Sudeep Goswami
- Department
of Chemistry, University of Manitoba, 144 Dysart Road, 450 Parker Building, Winnipeg, Manitoba R3T 2N2, Canada
| | - Dinesh M. Fernando
- Department
of Microbiology, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Ayush Kumar
- Department
of Microbiology, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
- Department
of Medical Microbiology, University of Manitoba, Winnipeg, Manitoba R3T 1R9, Canada
| | - George G. Zhanel
- Department
of Medical Microbiology, University of Manitoba, Winnipeg, Manitoba R3T 1R9, Canada
| | - Frank Schweizer
- Department
of Chemistry, University of Manitoba, 144 Dysart Road, 450 Parker Building, Winnipeg, Manitoba R3T 2N2, Canada
- Department
of Medical Microbiology, University of Manitoba, Winnipeg, Manitoba R3T 1R9, Canada
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10
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Gorityala BK, Guchhait G, Fernando DM, Deo S, McKenna SA, Zhanel GG, Kumar A, Schweizer F. Adjuvants Based on Hybrid Antibiotics Overcome Resistance in Pseudomonas aeruginosa
and Enhance Fluoroquinolone Efficacy. Angew Chem Int Ed Engl 2015; 55:555-9. [DOI: 10.1002/anie.201508330] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2015] [Revised: 10/06/2015] [Indexed: 11/08/2022]
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11
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Gorityala BK, Guchhait G, Fernando DM, Deo S, McKenna SA, Zhanel GG, Kumar A, Schweizer F. Adjuvants Based on Hybrid Antibiotics Overcome Resistance in Pseudomonas aeruginosa
and Enhance Fluoroquinolone Efficacy. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508330] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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12
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Quader S, Boyd SE, Jenkins ID, Houston TA. Direct Mitsunobu monoesterification of N-protected tobramycin competes with intramolecular pyrrolidine formation in ester prodrug synthesis. Carbohydr Res 2015; 413:16-21. [DOI: 10.1016/j.carres.2015.04.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Revised: 03/30/2015] [Accepted: 04/03/2015] [Indexed: 10/23/2022]
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13
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Gorityala BK, Guchhait G, Schweizer F. Amphiphilic Aminoglycoside Antimicrobials in Antibacterial Discovery. CARBOHYDRATES IN DRUG DESIGN AND DISCOVERY 2015. [DOI: 10.1039/9781849739993-00255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Amphiphilic aminoglycoside antimicrobials (AAAs) are an emerging class of polycationic antibacterial agents with broad-spectrum antibacterial activity. In contrast to aminoglycosides, which interfere with protein synthesis by interacting with the 30S ribosomal subunit, AAAs appear to target the bacterial cell wall by interactions with extracellular lipids or proteins or by enhancing the permeability of the bacterial cell wall. The physicochemical similarities between amphiphilic aminoglycosides and antimicrobial peptides, another class of polycationic amphiphiles with broad-spectrum antibacterial activity, suggest similar mode(s) of action. However, in contrast to antimicrobial peptides, AAAs are not composed of peptide bonds and as such promise to display superior metabolic stability. As a result, AAAs may be considered to be a novel class of antimicrobial peptidomimetics. Many AAAs possess impressive potent antibacterial activity against Gram-positive and Gram-negative bacteria, especially against bacterial strains that are resistant to clinically used antibiotics. In summary, AAAs promise to provide a new and rich source of antibacterial lead structures to combat antibiotic-resistant and multidrug-resistant pathogens.
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Affiliation(s)
| | - Goutam Guchhait
- Department of Chemistry, University of Manitoba Winnipeg, MB R3T 2N2 Canada
| | - Frank Schweizer
- Department of Chemistry, University of Manitoba Winnipeg, MB R3T 2N2 Canada
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14
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Guchhait G, Altieri A, Gorityala B, Yang X, Findlay B, Zhanel GG, Mookherjee N, Schweizer F. Amphiphilic Tobramycins with Immunomodulatory Properties. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500598] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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15
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Guchhait G, Altieri A, Gorityala B, Yang X, Findlay B, Zhanel GG, Mookherjee N, Schweizer F. Amphiphilic Tobramycins with Immunomodulatory Properties. Angew Chem Int Ed Engl 2015; 54:6278-82. [DOI: 10.1002/anie.201500598] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Indexed: 11/10/2022]
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16
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Berkov-Zrihen Y, Herzog IM, Feldman M, Fridman M. Site-Selective Displacement of Tobramycin Hydroxyls for Preparation of Antimicrobial Cationic Amphiphiles. Org Lett 2013; 15:6144-7. [DOI: 10.1021/ol4030138] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Yifat Berkov-Zrihen
- School of Chemistry, Raymond and Beverley Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Ido M. Herzog
- School of Chemistry, Raymond and Beverley Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Mark Feldman
- School of Chemistry, Raymond and Beverley Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Micha Fridman
- School of Chemistry, Raymond and Beverley Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
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17
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Pignatello R, Mangiafico A, Basile L, Ruozi B, Furneri PM. Amphiphilic ion pairs of tobramycin with lipoamino acids. Eur J Med Chem 2011; 46:1665-71. [PMID: 21396748 DOI: 10.1016/j.ejmech.2011.02.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2010] [Revised: 01/11/2011] [Accepted: 02/11/2011] [Indexed: 10/18/2022]
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18
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Bera S, Zhanel GG, Schweizer F. Synthesis and antibacterial activity of amphiphilic lysine-ligated neomycin B conjugates. Carbohydr Res 2011; 346:560-8. [PMID: 21353205 DOI: 10.1016/j.carres.2011.01.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 01/13/2011] [Accepted: 01/14/2011] [Indexed: 11/19/2022]
Abstract
Amphiphilic lysine-ligated neomycin B building blocks were prepared by reductive amination of a protected C5″-modified neomycin B-based aldehyde and side chain-unprotected lysine or lysine-containing peptides. It was demonstrated that a suitably protected lysine-ligated neomycin B conjugate (NeoK) serves as a building block for peptide synthesis, enabling incorporation of aminoglycoside binding sites into peptides. Antibacterial testing of three amphiphilic lysine-ligated neomycin B conjugates against a representative panel of Gram-positive and Gram-negative strains demonstrates that C5″-modified neomycin-lysine conjugate retains antibacterial activity. However, in most cases the lysine-ligated neomycin B analogs display reduced potency against Gram-positive strains when compared to unmodified neomycin B or unligated peptide. An exception is MRSA where an eightfold enhancement was observed. When compared to unmodified neomycin B, the prepared lysine-neomycin conjugates exhibited a 4-8-fold enhanced Gram-negative activity against Pseudomonas aeruginosa and up to 12-fold enhanced activity was observed when compared to unligated reference peptides.
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Affiliation(s)
- Smritilekha Bera
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
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19
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Pfrengle F, Reissig H. Internally Protected Amino Sugar Equivalents from Enantiopure 1,2‐Oxazines: Synthesis of Variably Configured Carbohydrates with C‐Branched Amino Sugar Units. Chemistry 2010; 16:11915-25. [DOI: 10.1002/chem.201001060] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Fabian Pfrengle
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin (Germany), Fax: (+49) 30‐83855367
| | - Hans‐Ulrich Reissig
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin (Germany), Fax: (+49) 30‐83855367
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20
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2-Deoxystreptamine Conjugates by Truncation-Derivatization of Neomycin. Pharmaceuticals (Basel) 2010; 3:679-701. [PMID: 27713274 PMCID: PMC4033975 DOI: 10.3390/ph3030679] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2009] [Revised: 03/08/2010] [Accepted: 03/10/2010] [Indexed: 11/16/2022] Open
Abstract
A small library of truncated neomycin-conjugates is prepared by consecutive removal of 2,6-diaminoglucose rings, oxidation-reductive amination of ribose, oxidation-conjugation of aminopyridine/aminoquinoline and finally dimerization. The dimeric conjugates were evaluated for antibacterial activity with a unique hemocyanin-based biosensor. Based on the outcome of these results, a second-generation set of monomeric conjugates was prepared and found to display significant antibacterial activity, in particular with respect to kanamycin-resistant E. coli.
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21
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Tan Q, Hayashi M. Asymmetric desymmetrization of 4,5-epoxycyclohex-1-ene by enantioselective allylic oxidation. Org Lett 2009; 11:3314-7. [PMID: 19580258 DOI: 10.1021/ol901284v] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Asymmetric desymmetrization of allylic oxidation of 4,5-epoxycyclohex-1-ene (1) took place in the presence of 2.5 mol % of Cu(CH(3)CN)(4)PF(6) and 3 mol % of chiral N,N-bidentate ligand (S)-2 to afford (3S,4S,5S)-3-benzoyloxy-4,5-epoxycyclohex-1-ene (3) in 84% ee, which was increased up to >99% ee after recrystallization of 3-4'-nitrobenzoyloxy derivative 6. Optically pure 6 proved to be a key intermediate for enantioselective synthesis of O-protected 2-deoxystreptamine (2-DOS) precursor 12.
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Affiliation(s)
- Qitao Tan
- Department of Frontier Research and Technology, Headquarters for Innovative Cooperation and Development, Kobe University, Nada, Kobe 657-8501, Japan
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22
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Kondo J, Pachamuthu K, François B, Szychowski J, Hanessian S, Westhof E. Crystal Structure of the Bacterial Ribosomal Decoding Site Complexed with a Synthetic Doubly Functionalized Paromomycin Derivative: a New Specific Binding Mode to an A-Minor Motif Enhances in vitro Antibacterial Activity. ChemMedChem 2007; 2:1631-8. [PMID: 17722211 DOI: 10.1002/cmdc.200700113] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The crystal structure of the complex between oligonucleotide containing the bacterial ribosomal decoding site (A site) and the synthetic paromomycin analogue 1, which contains the gamma-amino-alpha-hydroxybutyryl (L-haba) group at position N1 of ring II (2-DOS ring), and an ether chain with an O-phenethylaminoethyl group at position C2'' of ring III, is reported. Interestingly, next to the paromomycin analogue 1 specifically bound to the A site, a second molecule of 1 with a different conformation is observed at the crystal packing interface which mimics the A-minor interaction between two bulged-out adenines from the A site and the codon-anticodon stem of the mRNA-tRNA complex. Improved antibacterial activity supports the conclusion that analogue 1 might affect protein synthesis on the ribosome in two different ways: 1) specific binding to the A site forces maintenance of the "on" state with two bulged out adenines, and 2) a new binding mode of 1 to an A-minor motif which stabilizes complex formation between the ribosome and the mRNA-tRNA complex regardless of whether the codon-anticodon stem is of the cognate or near-cognate type.
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Affiliation(s)
- Jiro Kondo
- Architecture et Réactivité de l'ARN, Université Louis Pasteur, Institut de Biologie Moléculaire et Cellulaire, CNRS, 15 rue René Descartes, 67084 Strasbourg, France
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23
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Quader S, Boyd SE, Jenkins ID, Houston TA. Multisite modification of neomycin B: combined Mitsunobu and click chemistry approach. J Org Chem 2007; 72:1962-79. [PMID: 17298096 DOI: 10.1021/jo0620967] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The aminoglycoside antibiotic neomycin B has been converted into several novel building blocks that can be used for the specific modification of three of the four ring systems. Under carefully controlled conditions, the Mitsunobu reaction can be used to selectively dehydrate the ido ring to give the talo epoxide. Subsequently however, under more forcing conditions, the 2-deoxy streptamine ring undergoes Mitsunobu dehydration to give an aziridine. An unusual remote neighboring group effect was observed. When the primary hydroxyl of the ribose ring was blocked, aziridine formation on the deoxystreptamine ring did not occur. Both the epoxide and epoxide-aziridine neomycin building blocks can be ring-opened with azide and subjected to "click" type chemistry with terminal alkynes to generate a series of new neomycin analogues. These reactions can all be carried out without recourse to O-protecting groups. A detailed conformational analysis by NMR revealed some unexpected conformer preferences in these systems.
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Affiliation(s)
- Sabina Quader
- Eskitis Institute and Natural Product Discovery, Griffith University, Nathan, QLD 4111, Australia
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24
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Hanessian S, Adhikari S, Szychowski J, Pachamuthu K, Wang X, Migawa MT, Griffey RH, Swayze EE. Probing the ribosomal RNA A-site with functionally diverse analogues of paromomycin—synthesis of ring I mimetics. Tetrahedron 2007. [DOI: 10.1016/j.tet.2006.10.079] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Affiliation(s)
- Stephen Hanessian
- Department of Chemistry, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, QC, H3C3J7, Canada.
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Rao Y, Venot A, Swayze EE, Griffey RH, Boons GJ. Trisaccharide mimetics of the aminoglycoside antibiotic neomycin. Org Biomol Chem 2006; 4:1328-37. [PMID: 16557321 DOI: 10.1039/b517725a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly convergent approach for the chemical synthesis of eight structurally related trisaccharides that contain 3 to 5 amino groups has been described. Fourier-transformation ion cyclotron resonance mass spectrometry (FT-ICR MS) has been employed to determine the dissociation constants (Kd) for the binding of the trisaccharides to a prototypical fragment of 16S ribosomal RNA. A compound that contained a 4,6-dideoxy-4-amino-beta-D-glucopyranoside moiety at C-3 displayed binding in the low micromolar range. It was found that small structural changes of the saccharides resulted in large differences in affinity. The described structure-activity relationship is expected to be valuable for the development of novel antibiotics that target rRNA.
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Affiliation(s)
- Yu Rao
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602, USA
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27
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Liang FS, Wang SK, Nakatani T, Wong CH. Targeting RNAs with tobramycin analogues. Angew Chem Int Ed Engl 2006; 43:6496-500. [PMID: 15578772 DOI: 10.1002/anie.200460558] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Fu-Sen Liang
- Department of Chemistry and The Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037, USA
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Abstract
Reaction of hexa-N-Boc neomycin B with TPP and DIAD in toluene results in the formation of an epoxide in ring IV, not an aziridine or azetidine as previously reported.
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Affiliation(s)
- Sabina Quader
- Eskitis Institute, Griffith University, Nathan, Brisbane, QLD, Australia 4111
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29
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Zhang X, Wang X, Liu C. Molecular docking and 3D-QSAR study of pyranmycin derivatives against 16S rRNA A site. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.theochem.2005.05.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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30
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Rai R, McAlexander I, Chang CWT. SYNTHETIC GLYCODIVERSIFICATION. FROM AMINOSUGARS TO AMINOGLYCOSIDE ANTIBIOTICS. A REVIEW. ORG PREP PROCED INT 2005. [DOI: 10.1080/00304940509354969] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Liang FS, Wang SK, Nakatani T, Wong CH. Targeting RNAs with Tobramycin Analogues. Angew Chem Int Ed Engl 2004. [DOI: 10.1002/ange.200460558] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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32
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Venot A, Swayze EE, Griffey RH, Boons GJ. Disaccharide Mimetics of the Aminoglycoside Antibiotic Neamine. Chembiochem 2004; 5:1228-36. [PMID: 15368574 DOI: 10.1002/cbic.200400105] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A highly convergent approach has been employed for the facile synthesis of a library of 24 disaccharides that are alpha(1-3), beta(1-3), alpha(1-4), or beta(1-4) linked and contain 2-4 amino groups. Fourier-transformation ion cyclotron resonance mass spectrometry (FT-ICR MS) has been used to determine dissociation constant (Kd) values for the binding of the disaccharides to a prototypical fragment of 16S ribosomal RNA. Several derivatives bound with affinities similar to that of neamine. Structure-activity relationships have revealed the substitution pattern that is important for high-affinity binding. The compounds described here are unique lead compounds for the design of novel aminoglycoside antibiotics.
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Affiliation(s)
- Andre Venot
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602, USA
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33
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Wang J, Li J, Czyryca PG, Chang H, Kao J, Chang CWT. Synthesis of an unusual branched-chain sugar, 5-C-methyl-l-idopyranose for SAR studies of pyranmycins: implication for the future design of aminoglycoside antibiotics. Bioorg Med Chem Lett 2004; 14:4389-93. [PMID: 15357959 DOI: 10.1016/j.bmcl.2004.06.064] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2004] [Revised: 06/19/2004] [Accepted: 06/21/2004] [Indexed: 10/26/2022]
Abstract
The syntheses of a challenging branched-chain sugar and several L-sugars have been accomplished. Their application in studies of the antibacterial activity of pyranmycins is reported, which could provide new strategies for the future design of aminoglycoside antibiotics.
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Affiliation(s)
- Jinhua Wang
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan 84322-0300, USA
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34
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Synthesis of a protected enantiomerically pure 2-deoxystreptamine derivative from d-allylglycine. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.03.051] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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35
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Vicens Q, Westhof E. Molecular recognition of aminoglycoside antibiotics by ribosomal RNA and resistance enzymes: an analysis of x-ray crystal structures. Biopolymers 2003; 70:42-57. [PMID: 12925992 DOI: 10.1002/bip.10414] [Citation(s) in RCA: 123] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The potential of RNA molecules to be used as therapeutic targets by small inhibitors is now well established. In this fascinating wide-open field, aminoglycoside antibiotics constitute the most studied family of RNA binding drugs. Within the last three years, several x-ray crystal structures were solved for aminoglycosides complexed to one of their main natural targets in the bacterial cell, the decoding aminoacyl-tRNA site (A site). Other crystallographic structures have revealed the binding modes of aminoglycosides to the three existing types of resistance-associated enzymes. The present review summarizes the various aspects of the molecular recognition of aminoglycosides by these natural RNA or protein receptors. The analysis and the comparisons of the detailed interactions offer insights that are helpful in designing new generations of antibiotics.
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Affiliation(s)
- Quentin Vicens
- Institut de Biologie Moléculaire et Cellulaire du CNRS, Modélisation et simulations des Acides Nucléiques, UPR 9002, Université Louis Pasteur, 15 rue René Descartes, 67084 Strasbourg Cedex, France
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