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Wang S, Zhao K, Chen Z, Liu D, Tang S, Sun C, Chen H, Wang Y, Wu C. Halicin: A New Horizon in Antibacterial Therapy against Veterinary Pathogens. Antibiotics (Basel) 2024; 13:492. [PMID: 38927159 PMCID: PMC11200678 DOI: 10.3390/antibiotics13060492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 06/28/2024] Open
Abstract
It is crucial to discover novel antimicrobial drugs to combat resistance. This study investigated the antibacterial properties of halicin (SU3327), an AI-identified anti-diabetic drug, against 13 kinds of common clinical pathogens of animal origin, including multidrug-resistant strains. Employing minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) assessments, halicin demonstrated a broad-spectrum antibacterial effect. Time-killing assays revealed its concentration-dependent bactericidal activity against Escherichia coli ATCC 25922 (E. coli ATCC 25922), Staphylococcus aureus ATCC 29213 (S. aureus ATCC 29213), and Actinobacillus pleuropneumoniae S6 (APP S6) after 4 h of treatment at concentrations above the MIC. Halicin exhibited longer post-antibiotic effects (PAEs) and sub-MIC effects (PA-SMEs) for E. coli 25922, S. aureus 29213, and APP S6 compared to ceftiofur and ciprofloxacin, the commonly used veterinary antimicrobial agents, indicating sustained antibacterial action. Additionally, the results of consecutive passaging experiments over 40 d at sub-inhibitory concentrations showed that bacteria exhibited difficulty in developing resistance to halicin. Toxicology studies confirmed that halicin exhibited low acute toxicity, being non-mutagenic, non-reproductive-toxic, and non-genotoxic. Blood biochemical results suggested that halicin has no significant impact on hematological parameters, liver function, and kidney function. Furthermore, halicin effectively treated respiratory A. pleuropneumoniae infections in murine models. These results underscore the potential of halicin as a new antibacterial agent with applications against clinically relevant pathogens in veterinary medicine.
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Affiliation(s)
- Shuge Wang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Ke Zhao
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Ziqi Chen
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Dejun Liu
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Shusheng Tang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Chengtao Sun
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Hongliang Chen
- School of Life Sciences, Xiamen University, Xiamen 361005, China;
- Xiamen Vangenes Biotechnology Co., Ltd., Xiamen 361006, China
| | - Yang Wang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
| | - Congming Wu
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China; (S.W.); (K.Z.); (Z.C.); (D.L.); (S.T.); (C.S.)
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Wang C, Xia Y, Wang R, Li J, Chan CL, Kao RYT, Toy PH, Ho PL, Li H, Sun H. Metallo-sideromycin as a dual functional complex for combating antimicrobial resistance. Nat Commun 2023; 14:5311. [PMID: 37658047 PMCID: PMC10474269 DOI: 10.1038/s41467-023-40828-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 08/11/2023] [Indexed: 09/03/2023] Open
Abstract
The rapid emergence of antimicrobial resistance (AMR) pathogens highlights the urgent need to approach this global burden with alternative strategies. Cefiderocol (Fetroja®) is a clinically-used sideromycin, that is utilized for the treatment of severe drug-resistant infections, caused by Gram-negative bacteria; there is evidence of cefiderocol-resistance occurring in bacterial strains however. To increase the efficacy and extend the life-span of sideromycins, we demonstrate strong synergisms between cefiderocol and metallodrugs (e.g., colloidal bismuth citrate (CBS)), against Pseudomonas aeruginosa and Burkholderia cepacia. Moreover, CBS enhances cefiderocol efficacy against biofilm formation, suppresses the resistance development in P. aeruginosa and resensitizes clinically isolated resistant P. aeruginosa to cefiderocol. Notably, the co-therapy of CBS and cefiderocol significantly increases the survival rate of mice and decreases bacterial loads in the lung in a murine acute pneumonia model. The observed phenomena are partially attributable to the competitive binding of Bi3+ to cefiderocol with Fe3+, leading to enhanced uptake of Bi3+ and reduced levels of Fe3+ in cells. Our studies provide insight into the antimicrobial potential of metallo-sideromycins.
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Affiliation(s)
- Chenyuan Wang
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, PR China
| | - Yushan Xia
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, PR China
| | - Runming Wang
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, PR China
| | - Jingru Li
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, PR China
- Chemistry and Chemical Engineering Guangdong Laboratory, Guangdong, PR China
| | - Chun-Lung Chan
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, PR China
| | - Richard Yi-Tsun Kao
- Department of Microbiology, The University of Hong Kong, Sassoon Road, Hong Kong SAR, PR China
| | - Patrick H Toy
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, PR China
| | - Pak-Leung Ho
- Department of Microbiology, The University of Hong Kong, Sassoon Road, Hong Kong SAR, PR China
- Carol Yu Centre for Infection, The University of Hong Kong, Sassoon Road, Hong Kong SAR, PR China
| | - Hongyan Li
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, PR China.
- State Key Laboratory of Synthetic Chemistry and CAS-HKU Joint Laboratory of Metallomics for Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, PR China.
| | - Hongzhe Sun
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, PR China.
- State Key Laboratory of Synthetic Chemistry and CAS-HKU Joint Laboratory of Metallomics for Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, PR China.
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Michaut M, Steffen A, Contreras JM, Morice C, Schalk IJ, Plésiat P, Mislin GLA. 1,2,3-Triazole-gold(I)-triethylposphine derivatives active against resistant Gram-positive pathogens. Bioorg Med Chem Lett 2021; 40:127879. [PMID: 33636306 DOI: 10.1016/j.bmcl.2021.127879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 01/06/2021] [Accepted: 02/10/2021] [Indexed: 10/22/2022]
Abstract
Innovative organogold(I) antibacterial compounds were synthesized by click chemistry with triethylphosphine-gold(I) azides and an alkyne derivative. The resulting organo-gold(I) compounds exhibit high levels of antibacterial activity against Gram-positive pathogens, with particularly low MICs against Clostridium difficile.
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Affiliation(s)
- Mathieu Michaut
- Prestwick Chemical, PC SAS, 220 Boulevard Gonthier d'Andernach, 67400 Illkirch-Graffenstaden, France
| | - Alexandre Steffen
- Prestwick Chemical, PC SAS, 220 Boulevard Gonthier d'Andernach, 67400 Illkirch-Graffenstaden, France
| | - Jean-Marie Contreras
- Prestwick Chemical, PC SAS, 220 Boulevard Gonthier d'Andernach, 67400 Illkirch-Graffenstaden, France
| | - Christophe Morice
- Prestwick Chemical, PC SAS, 220 Boulevard Gonthier d'Andernach, 67400 Illkirch-Graffenstaden, France
| | - Isabelle J Schalk
- CNRS, UMR7242 Biotechnologie et Signalisation Cellulaire, 300 Boulevard Sébastien Brant, 67400 Illkirch-Graffenstaden, France; Université de Strasbourg, Institut de Recherche de l'Ecole de Biotechnologie de Strasbourg (IREBS), 67400 Illkirch-Graffenstaden, France; Interdisciplinary Thematic Institute for Innovative Vectorization (ITI InnoVec), Université de Strasbourg, 67000 Strasbourg, France
| | - Patrick Plésiat
- Laboratoire de Bactériologie, UMR 6249 CNRS Chrono-Environnement, UFR Santé, Université Bourgogne Franche-Comté, 25000 Besançon, France
| | - Gaëtan L A Mislin
- CNRS, UMR7242 Biotechnologie et Signalisation Cellulaire, 300 Boulevard Sébastien Brant, 67400 Illkirch-Graffenstaden, France; Université de Strasbourg, Institut de Recherche de l'Ecole de Biotechnologie de Strasbourg (IREBS), 67400 Illkirch-Graffenstaden, France; Interdisciplinary Thematic Institute for Innovative Vectorization (ITI InnoVec), Université de Strasbourg, 67000 Strasbourg, France.
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Insa S, Alioune F, Aicha BL, Fama NS, Seydou K, Abdoulaye D, Ismaïla C, Abda B, Amadou D, Sadibou BC, Generosa G, Yagamare F, Matar S. Synthesis, Characterization and Antimicrobial Activities of 1,4- Disubstituted 1,2,3-Triazole Compounds. Curr Top Med Chem 2020; 20:2289-2299. [PMID: 32814526 DOI: 10.2174/1568026620666200819143029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND 1,2,3-triazoles are five-membered heterocyclic scaffold; their broad-spectrum biological activities are known. Researchers around the world are increasingly being interested in this emerging area, owing to its immense pharmacological scope. OBJECTIVE This work summarizes the synthesis of 1,2,3-triazoles and the significance of this pattern as a lead structure for new drug molecules discovery. METHODS 1,2,3-triazoles can be obtained on a multigram scale through "click chemistry" under ambient conditions. RESULTS Sixteen compounds were synthesized and evaluated on five microbial strains E. coli, E. faecalis, P. aeruginosa, S. aureus and C. albicans. NMR, MS and IR were used to characterize all compounds. They were evaluated with their Minimum Inhibitory Concentrations (MICs) and interesting results were obtained with compounds 12a, 12b, 3, 2a and 2c, with MIC 0.14 μM (P. aeruginosa), 1.08 μM (E. coli), 1.20 μM (E. faecalis and C. albicans), 3.5 μM (E. faecalis) and 4.24 μM (C. albicans), respectively. P. aeruginosa and C. albicans were the most sensitive among all the strains. CONCLUSION The synthesized compounds were found as potential antimicrobial agents against Gram (+), Gram (-) strains and fungi.
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Affiliation(s)
- Seck Insa
- Laboratoire de Chimie de Coordination Organique (LCCO), Departement de Chimie, Faculte des Sciences et Techniques, Universite Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Fall Alioune
- Laboratoire de Chimie de Coordination Organique (LCCO), Departement de Chimie, Faculte des Sciences et Techniques, Universite Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Ba Lalla Aicha
- Universite Amadou Mahtar Mbow, Campus de Dakar, Cite Keur-Gorgui, lot 75R VDN, BP 45927 Dakar FANN-VDN. Dakar, Senegal
| | - Ndoye Samba Fama
- Laboratoire de Chimie Organique et Therapeutique, Faculte de Medecine, de Pharmacie et d'Odontologie de l'Universite Cheikh Anta Diop de Dakar, BP 5005, Dakar-Fann, Senegal
| | - Ka Seydou
- Laboratoire de Chimie Organique et Therapeutique, Faculte de Medecine, de Pharmacie et d'Odontologie de l'Universite Cheikh Anta Diop de Dakar, BP 5005, Dakar-Fann, Senegal
| | - Diop Abdoulaye
- Laboratoire Bacteriologie-Virologie, CHU Aristide Le Dantec, Universite Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Ciss Ismaïla
- Laboratoire de Chimie Organique et Therapeutique, Faculte de Medecine, de Pharmacie et d'Odontologie de l'Universite Cheikh Anta Diop de Dakar, BP 5005, Dakar-Fann, Senegal
| | - Ba Abda
- Laboratoire de Chimie Organique et Therapeutique, Faculte de Medecine, de Pharmacie et d'Odontologie de l'Universite Cheikh Anta Diop de Dakar, BP 5005, Dakar-Fann, Senegal
| | - Diop Amadou
- Laboratoire Bacteriologie-Virologie, CHU Aristide Le Dantec, Universite Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Boye Cheikh Sadibou
- Laboratoire Bacteriologie-Virologie, CHU Aristide Le Dantec, Universite Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Gomez Generosa
- Departamento de Quimica Organica, Facultad de Quimica and Instituto de Investigacion Biomedica (IBI), University of Vigo, Campus Lagoas de Marcosende, 36310 Vigo, Spain
| | - Fall Yagamare
- Departamento de Quimica Organica, Facultad de Quimica and Instituto de Investigacion Biomedica (IBI), University of Vigo, Campus Lagoas de Marcosende, 36310 Vigo, Spain
| | - Seck Matar
- Laboratoire de Chimie Organique et Therapeutique, Faculte de Medecine, de Pharmacie et d'Odontologie de l'Universite Cheikh Anta Diop de Dakar, BP 5005, Dakar-Fann, Senegal
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Secondary Metabolites of Endophytic Actinomycetes: Isolation, Synthesis, Biosynthesis, and Biological Activities. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 108 2019; 108:207-296. [DOI: 10.1007/978-3-030-01099-7_3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Phytochemical Profile and Antibacterial and Antioxidant Activities of Medicinal Plants Used by Aboriginal People of New South Wales, Australia. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 2016:4683059. [PMID: 27563335 PMCID: PMC4985604 DOI: 10.1155/2016/4683059] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 06/29/2016] [Indexed: 01/31/2023]
Abstract
Aboriginal people of Australia possess a rich knowledge on the use of medicinal plants for the treatment of sores, wounds, and skin infections, ailments which impose a high global disease burden and require effective treatments. The antibacterial and antioxidant activities and phytochemical contents of extracts, obtained from eight medicinal plants used by Aboriginal people of New South Wales, Australia, for the treatment of skin related ailments, were assessed to add value to and provide an evidence-base for their traditional uses. Extracts of Acacia implexa, Acacia falcata, Cassytha glabella, Eucalyptus haemastoma, Smilax glyciphylla, Sterculia quadrifida, and Syncarpia glomulifera were evaluated. All extracts except that of S. quadrifida showed activity against sensitive and multidrug resistant strains of Staphylococcus aureus with minimum inhibitory concentration values ranging from 7.81 to 1000 μg/mL. The sap of E. haemastoma and bark of A. implexa possessed high total phenolic contents (TPC) and strong DPPH radical scavenging abilities. A positive correlation was observed between TPC and free radical scavenging ability. GC-MS analysis of the n-hexane extract of S. glomulifera identified known antimicrobial compounds. Together, these results support the traditional uses of the examined plants for the treatment of skin related ailments and infections by Aboriginal people of New South Wales, Australia.
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Paulen A, Gasser V, Hoegy F, Perraud Q, Pesset B, Schalk IJ, Mislin GLA. Synthesis and antibiotic activity of oxazolidinone-catechol conjugates against Pseudomonas aeruginosa. Org Biomol Chem 2016; 13:11567-79. [PMID: 26509593 DOI: 10.1039/c5ob01859e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Pseudomonas aeruginosa is a Gram-negative pathogenic bacterium responsible for severe infections in which resistance to most of the approved families of antibiotics is increasing. Oxazolidinone antibiotics are active against many Gram-positive bacteria, but are only weakly active against Gram-negative pathogens. We describe the synthesis of conjugates between a catechol moiety and oxazolidinone antibiotics. These conjugates were significantly more active against P. aeruginosa (218-1024 μM) than linezolid (MIC > 1024 μM), the reference molecule from the oxazolidinone family. Antibiotic activity was slightly higher in medium depleted of iron, suggesting the involvement of a bacterial iron uptake system in this biological activity. The bacterial iron uptake pathway involved in the transport is still to be addressed, but the present data excluded a contribution of the enterobactin transporter PfeA.
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Affiliation(s)
- Aurélie Paulen
- Equipe Transport Membranaire Bactérien, Biotechnologie et Signalisation Cellulaire, UMR7242 Université de Strasbourg-CNRS, Pole API, 300 boulevard Sébastien Brant, CS10413, 67412 Illkirch Cedex, France.
| | - Véronique Gasser
- Equipe Transport Membranaire Bactérien, Biotechnologie et Signalisation Cellulaire, UMR7242 Université de Strasbourg-CNRS, Pole API, 300 boulevard Sébastien Brant, CS10413, 67412 Illkirch Cedex, France.
| | - Françoise Hoegy
- Equipe Transport Membranaire Bactérien, Biotechnologie et Signalisation Cellulaire, UMR7242 Université de Strasbourg-CNRS, Pole API, 300 boulevard Sébastien Brant, CS10413, 67412 Illkirch Cedex, France.
| | - Quentin Perraud
- Equipe Transport Membranaire Bactérien, Biotechnologie et Signalisation Cellulaire, UMR7242 Université de Strasbourg-CNRS, Pole API, 300 boulevard Sébastien Brant, CS10413, 67412 Illkirch Cedex, France.
| | - Bénédicte Pesset
- Equipe Transport Membranaire Bactérien, Biotechnologie et Signalisation Cellulaire, UMR7242 Université de Strasbourg-CNRS, Pole API, 300 boulevard Sébastien Brant, CS10413, 67412 Illkirch Cedex, France.
| | - Isabelle J Schalk
- Equipe Transport Membranaire Bactérien, Biotechnologie et Signalisation Cellulaire, UMR7242 Université de Strasbourg-CNRS, Pole API, 300 boulevard Sébastien Brant, CS10413, 67412 Illkirch Cedex, France.
| | - Gaëtan L A Mislin
- Equipe Transport Membranaire Bactérien, Biotechnologie et Signalisation Cellulaire, UMR7242 Université de Strasbourg-CNRS, Pole API, 300 boulevard Sébastien Brant, CS10413, 67412 Illkirch Cedex, France.
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Ravi Kumar A, Sathaiah G, Chandra Shekhar A, Raju K, Shanthan Rao P, Narsaiah B, Raju YK, Murthy USN. Synthesis of NovelN-Triazolo Methyl Substituted Fluoroquinolones and Their Antimicrobial Activity. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.2034] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- A Ravi Kumar
- Fluoroorganics Division; Indian Institute of Chemical Technology; Tarnaka Hyderabad 500 607 India
| | - G. Sathaiah
- Fluoroorganics Division; Indian Institute of Chemical Technology; Tarnaka Hyderabad 500 607 India
| | - A. Chandra Shekhar
- Fluoroorganics Division; Indian Institute of Chemical Technology; Tarnaka Hyderabad 500 607 India
| | - K. Raju
- Fluoroorganics Division; Indian Institute of Chemical Technology; Tarnaka Hyderabad 500 607 India
| | - P. Shanthan Rao
- Fluoroorganics Division; Indian Institute of Chemical Technology; Tarnaka Hyderabad 500 607 India
| | - B. Narsaiah
- Fluoroorganics Division; Indian Institute of Chemical Technology; Tarnaka Hyderabad 500 607 India
| | - Y. K. Raju
- Biology Division (Bioinformatics); Indian Institute of Chemical Technology; Tarnaka Hyderabad 500 607 India
| | - U. S. N. Murthy
- Biology Division (Bioinformatics); Indian Institute of Chemical Technology; Tarnaka Hyderabad 500 607 India
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Mislin GLA, Schalk IJ. Siderophore-dependent iron uptake systems as gates for antibiotic Trojan horse strategies against Pseudomonas aeruginosa. Metallomics 2014; 6:408-20. [PMID: 24481292 DOI: 10.1039/c3mt00359k] [Citation(s) in RCA: 136] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pseudomonas aeruginosa is a Gram-negative opportunistic pathogen responsible for nosocomial infections. The prevalence of antibiotic-resistant P. aeruginosa strains is increasing, necessitating the urgent development of new strategies to improve the control of this pathogen. Its bacterial envelope constitutes of an outer and an inner membrane enclosing the periplasm. This structure plays a key role in the resistance of the pathogen, by decreasing the penetration and the biological impact of many antibiotics. However, this barrier may also be seen as the "Achilles heel" of the bacterium as some of its functions provide opportunities for breaching bacterial defenses. Siderophore-dependent iron uptake systems act as gates in the bacterial envelope and could be used in a "Trojan horse" strategy, in which the conjugation of an antibiotic to a siderophore could significantly increase the biological activity of the antibiotic, by enhancing its transport into the bacterium. In this review, we provide an overview of the various siderophore-antibiotic conjugates that have been developed for use against P. aeruginosa and show that an accurate knowledge of the structural and functional features of the proteins involved in this transmembrane transport is required for the design and synthesis of effective siderophore-antibiotic Trojan horse conjugates.
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Affiliation(s)
- Gaëtan L A Mislin
- UMR 7242, Université de Strasbourg-CNRS, ESBS, 300 Boulevard, Sébastien Brant, F-67413 Illkirch, Strasbourg, France.
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Azéma J, Guidetti B, Korolyov A, Kiss R, Roques C, Constant P, Daffé M, Malet-Martino M. Synthesis of lipophilic dimeric C-7/C-7-linked ciprofloxacin and C-6/C-6-linked levofloxacin derivatives. Versatile in vitro biological evaluations of monomeric and dimeric fluoroquinolone derivatives as potential antitumor, antibacterial or antimycobacterial agents. Eur J Med Chem 2011; 46:6025-38. [DOI: 10.1016/j.ejmech.2011.10.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Revised: 10/06/2011] [Accepted: 10/06/2011] [Indexed: 10/16/2022]
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Noël S, Gasser V, Pesset B, Hoegy F, Rognan D, Schalk IJ, Mislin GLA. Synthesis and biological properties of conjugates between fluoroquinolones and a N3''-functionalized pyochelin. Org Biomol Chem 2011; 9:8288-300. [PMID: 22052022 DOI: 10.1039/c1ob06250f] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Pyochelin is a siderophore common to Pseudomonas aeruginosa and several other pathogenic bacteria. A pyochelin functionalized at the N3'' position with a propyl-amine extension was previously synthesized. In the present work we proved that this analog binds FptA, the pyochelin outer membrane receptor, and transports iron(III) efficiently into bacteria. This functionalized pyochelin seemed to be a good candidate for antibiotic vectorization in the framework of a Trojan horse prodrug strategy. In this context, conjugates between pyochelin and three fluoroquinolones (norfloxacin, ciprofloxacin and N-desmethyl-ofloxacin) were synthesized with a spacer arm that was either stable or hydrolyzable in vivo. Some pyochelin-fluoroquinolone conjugates had antibacterial activities in growth inhibition experiments on several P. aeruginosa strains. However, these activities were weaker than those of the antibiotic alone. These properties appeared to be related to both the solubility and bioavailability of conjugates and to the stability of the spacer arm used.
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Affiliation(s)
- Sabrina Noël
- Team Transports Membranaires Bactériens, UMR 7242 Université de Strasbourg-CNRS, Boulevard Sébastien Brant, 67400 Illkirch, France
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Salazar-Aranda R, Pérez-López LA, López-Arroyo J, Alanís-Garza BA, Waksman de Torres N. Antimicrobial and antioxidant activities of plants from northeast of Mexico. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2011; 2011:536139. [PMID: 19770266 PMCID: PMC3136635 DOI: 10.1093/ecam/nep127] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Accepted: 07/21/2009] [Indexed: 11/17/2022]
Abstract
Traditional medicine has a key role in health care worldwide. Obtaining scientific information about the efficacy and safety of the plants from our region is one of the goals of our research group. In this report, 17 plants were selected and collected in different localities from northeast Mexico. The dried plants were separated into leaves, flowers, fruit, stems, roots and bark. Each part was extracted with methanol, and 39 crude extracts were prepared. The extracts were tested for their antimicrobial activity using three Gram-negative bacterial strains (Pseudomonas aeruginosa, Klebsiella pneumoniae and Acinetobacter baumannii), three Gram-positive bacterial strains (Enterococcus faecalis and two Staphylococcus aureus strains), and seven clinically isolated yeasts (Candida albicans, C. krusei, C. tropicalis, C. parapsilosis and C. glabrata); their antioxidant activity was tested using a DPPH free radical assay. No activity against Gram-negative bacteria was observed with any extract up to the maximum concentration tested, 1000 μg ml−1. We report here for the first time activity of Ceanothus coeruleus against S. aureus (flowers, minimal inhibitory concentration (MIC) 125 μg ml−1), C. glabrata (MICs 31.25 μg ml−1) and C. parapsilosis (MICs between 31.25 and 125 μg ml−1); Chrysanctinia mexicana against C. glabrata (MICs 31.25 μg ml−1); Colubrina greggii against E. faecalis (MICs 250 μg ml−1) and Cordia boissieri against C. glabrata (MIC 125 μg ml−1). Furthermore, this is the first report about antioxidant activity of extracts from Ceanothus coeruleus, Chrysanctinia mexicana, Colubrina greggii and Cyperus alternifolius. Some correlation could exist between antioxidant activity and antiyeast activity against yeasts in the species Ceanothus coeruleus, Schinus molle, Colubrina greggii and Cordia boissieri.
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Affiliation(s)
- Ricardo Salazar-Aranda
- Departamento de Química Analítica, Facultad de Medicina, U.A.N.L. Monterrey, P.O. Box 2316, Sucursal Tecnol579gico, 64841, N. L. México, Mexico
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Fincham JE. Public health teaching and research in the academy. AMERICAN JOURNAL OF PHARMACEUTICAL EDUCATION 2010; 74:93. [PMID: 20798792 PMCID: PMC2907858 DOI: 10.5688/aj740593] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Affiliation(s)
- Jack E Fincham
- The University of Missouri Kansas City School of Pharmacy, Kansas City, MO 64106, USA.
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Wencewicz TA, Möllmann U, Long TE, Miller MJ. Is drug release necessary for antimicrobial activity of siderophore-drug conjugates? Syntheses and biological studies of the naturally occurring salmycin "Trojan Horse" antibiotics and synthetic desferridanoxamine-antibiotic conjugates. Biometals 2009; 22:633-48. [PMID: 19221879 DOI: 10.1007/s10534-009-9218-3] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2008] [Accepted: 01/27/2009] [Indexed: 11/30/2022]
Abstract
The recent rise in drug resistance found amongst community acquired infections has sparked renewed interest in developing antimicrobial agents that target resistant organisms and limit the natural selection of immune variants. Recent discoveries have shown that iron uptake systems in bacteria and fungi are suitable targets for developing such therapeutic agents. The use of siderophore-drug conjugates as "Trojan Horse" drug delivery agents has attracted particular interest in this area. This review will discuss efforts in our research group to study the salmycin class of "Trojan Horse" antibiotics. Inspired by the natural design of the salmycins, a series of desferridanoxamine-antibiotic conjugates were synthesized and tested in microbial growth inhibition assays. The results of these studies will be related to understanding the role of drug release in siderophore-mediated drug delivery with implications for future siderophore-drug conjugate design.
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Affiliation(s)
- Timothy A Wencewicz
- Department of Chemistry and Biochemistry, University of Notre Dame, IN 46556, USA
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