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de Matos AM, Calado P, Miranda M, Almeida R, Rauter AP, Oliveira MC, Manageiro V, Caniça M. Alkyl deoxyglycoside-polymyxin combinations against critical priority carbapenem-resistant gram-negative bacteria. Sci Rep 2024; 14:2219. [PMID: 38278870 PMCID: PMC10817917 DOI: 10.1038/s41598-024-51428-6] [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: 08/07/2023] [Accepted: 01/04/2024] [Indexed: 01/28/2024] Open
Abstract
The escalating antimicrobial resistance crisis urges the development of new antibacterial treatments with innovative mechanisms of action, particularly against the critical priority carbapenem-resistant Acinetobacter baumannii (CRAB), Pseudomonas aeruginosa (CRPA) and Enterobacteriaceae (CRE). Membrane-disrupting dodecyl deoxyglycosides have been reported for their interesting phosphatidylethanolamine-associated bactericidal activity against Gram-positive strains; however, their inability to penetrate the Gram-negative outer membrane (OM) renders them useless against the most challenging pathogens. Aiming to repurpose alkyl deoxyglycosides against Gram-negative bacteria, this study investigates the antimicrobial effects of five reference compounds with different deoxygenation patterns or anomeric configurations in combination with polymyxins as adjuvants for enhanced OM permeability. The generation of the lead 4,6-dideoxy scaffold was optimized through a simultaneous dideoxygenation step and applied to the synthesis of a novel alkyl 4,6-dideoxy C-glycoside 5, herein reported for the first time. When combined with subtherapeutic colistin concentrations, most glycosides demonstrated potent antimicrobial activity against several multidrug-resistant clinical isolates of CRAB, CRE and CRPA exhibiting distinct carbapenem resistance mechanisms, together with acceptable cytotoxicity against human HEK-293T and Caco-2 cells. The novel 4,6-dideoxy C-glycoside 5 emerged as the most promising prototype structure for further development (MIC 3.1 μg/mL when combined with colistin 0.5 μg/mL against CRPA or 0.25 μg/mL against several CRE and CRAB strains), highlighting the potential of C-glycosylation for an improved bioactive profile. This study is the first to show the potential of IM-targeting carbohydrate-based compounds for the treatment of infections caused by MDR Gram-negative pathogens of clinical importance.
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Affiliation(s)
- Ana M de Matos
- Centro de Química Estrutural, Institute of Molecular Sciences, Departmento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Campo Grande, Lisbon, Portugal.
| | - Patrícia Calado
- Centro de Química Estrutural, Institute of Molecular Sciences, Departmento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Campo Grande, Lisbon, Portugal
| | - Mónica Miranda
- Centro de Química Estrutural, Institute of Molecular Sciences, Departmento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Campo Grande, Lisbon, Portugal
| | - Rita Almeida
- Centro de Química Estrutural, Institute of Molecular Sciences, Departmento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Campo Grande, Lisbon, Portugal
| | - Amélia P Rauter
- Centro de Química Estrutural, Institute of Molecular Sciences, Departmento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016, Campo Grande, Lisbon, Portugal
| | - M Conceição Oliveira
- Centro de Química Estrutural, Institute of Molecular Sciences, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001, Lisbon, Portugal
| | - Vera Manageiro
- National Reference Laboratory of Antibiotic Resistances and Healthcare-Associated Infections, Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, 1649-016, Lisbon, Portugal
- Centre for the Studies of Animal Science, Institute of Agrarian and Agri-Food Sciences and Technologies, University of Porto, Porto, Portugal
- AL4AnimalS, Associate Laboratory for Animal and Veterinary Sciences, Lisbon, Portugal
| | - Manuela Caniça
- National Reference Laboratory of Antibiotic Resistances and Healthcare-Associated Infections, Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, 1649-016, Lisbon, Portugal
- Centre for the Studies of Animal Science, Institute of Agrarian and Agri-Food Sciences and Technologies, University of Porto, Porto, Portugal
- AL4AnimalS, Associate Laboratory for Animal and Veterinary Sciences, Lisbon, Portugal
- CIISA, Center for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Lisbon, Portugal
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Sue K, Cadelis MM, Hainsworth K, Rouvier F, Bourguet-Kondracki ML, Brunel JM, Copp BR. Preliminary SAR of Novel Pleuromutilin-Polyamine Conjugates. Microorganisms 2023; 11:2791. [PMID: 38004802 PMCID: PMC10673369 DOI: 10.3390/microorganisms11112791] [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: 09/25/2023] [Revised: 11/03/2023] [Accepted: 11/13/2023] [Indexed: 11/26/2023] Open
Abstract
While pleuromutilin (1) and its clinically available derivatives (2-6) are highly effective against Gram-positive bacteria, they remain inactive against many pathogenic Gram-negative bacteria due to the efflux pump AcrAB-TolC. In an effort to broaden the spectrum of activity of pleuromutilin (1), we developed a series of novel pleuromutilin-polyamine conjugates (9a-f) which exhibited promising intrinsic antimicrobial properties, targeting both Gram-positive and Gram-negative bacteria, including Staphylococcus aureus, methicillin-resistant S. aureus (MRSA), and Escherichia coli, along with the fungal strain Cryptococcus neoformans, and were devoid of cytotoxic and hemolytic properties with the exception of one conjugate. Furthermore, this series displayed moderate to low antibiotic potentiation of legacy antibiotics doxycycline and erythromycin, with three conjugates enhancing the activity four-fold in combination with doxycycline. In comparison to pleuromutilin (1) and tiamulin (2), one of the conjugates exhibited an expanded spectrum of activity, including Gram-negative bacteria and fungi, making it a promising option for combating microbial infections.
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Affiliation(s)
- Kenneth Sue
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Melissa M. Cadelis
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
- School of Medical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Kerrin Hainsworth
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Florent Rouvier
- Membranes et Cibles Thérapeutiques, INSERM, Aix-Marseille Universite, 27 bd Jean Moulin, 13385 Marseille, France
| | - Marie-Lise Bourguet-Kondracki
- Laboratoire Molécules de Communication et Adaptation des Micro-organismes, UMR 7245 CNRS, Muséum National d’Histoire Naturelle, 57 rue Cuvier (C.P. 54), 75005 Paris, France
| | - Jean Michel Brunel
- Membranes et Cibles Thérapeutiques, INSERM, Aix-Marseille Universite, 27 bd Jean Moulin, 13385 Marseille, France
| | - Brent R. Copp
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
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