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Ediriweera GR, Butcher NJ, Kothapalli A, Zhao J, Blanchfield JT, Subasic CN, Grace JL, Fu C, Tan X, Quinn JF, Ascher DB, Whittaker MR, Whittaker AK, Kaminskas LM. Lipid sulfoxide polymers as potential inhalable drug delivery platforms with differential albumin binding affinity. Biomater Sci 2024; 12:2978-2992. [PMID: 38683548 DOI: 10.1039/d3bm02020g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
Inhalable nanomedicines are increasingly being developed to optimise the pharmaceutical treatment of respiratory diseases. Large lipid-based nanosystems at the forefront of the inhalable nanomedicines development pipeline, though, have a number of limitations. The objective of this study was, therefore, to investigate the utility of novel small lipidated sulfoxide polymers based on poly(2-(methylsulfinyl)ethyl acrylate) (PMSEA) as inhalable drug delivery platforms with tuneable membrane permeability imparted by differential albumin binding kinetics. Linear PMSEA (5 kDa) was used as a hydrophilic polymer backbone with excellent anti-fouling and stealth properties compared to poly(ethylene glycol). Terminal lipids comprising single (1C2, 1C12) or double (2C12) chain diglycerides were installed to provide differing affinities for albumin and, by extension, albumin trafficking pathways in the lungs. Albumin binding kinetics, cytotoxicity, lung mucus penetration and cellular uptake and permeability through key cellular barriers in the lungs were examined in vitro. The polymers showed good mucus penetration and no cytotoxicity over 24 h at up to 1 mg ml-1. While 1C2-showed no interaction with albumin, 1C12-PMSEA and 2C12-PMSEA bound albumin with KD values of approximately 76 and 10 μM, respectively. Despite binding to albumin, 2C12-PMSEA showed reduced cell uptake and membrane permeability compared to the smaller polymers and the presence of albumin had little effect on cell uptake and membrane permeability. While PMSEA strongly shielded these lipids from albumin, the data suggest that there is scope to tune the lipid component of these systems to control membrane permeability and cellular interactions in the lungs to tailor drug disposition in the lungs.
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Affiliation(s)
- Gayathri R Ediriweera
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
| | - Neville J Butcher
- School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia.
| | - Ashok Kothapalli
- School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia.
| | - Jiacheng Zhao
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
| | - Joanne T Blanchfield
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Christopher N Subasic
- School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia.
| | - James L Grace
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, 3052, Australia
| | - Changkui Fu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
| | - Xiao Tan
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
| | - John F Quinn
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, 3052, Australia
- Department of Chemical Engineering, Monash University, Clayton, VIC, Australia
| | - David B Ascher
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD, 4072, Australia
- Computational Biology and Clinical Informatics, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Michael R Whittaker
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, 3052, Australia
| | - Andrew K Whittaker
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
| | - Lisa M Kaminskas
- School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia.
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2
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Hussein M, Mahboob MBH, Tait JR, Grace JL, Montembault V, Fontaine L, Quinn JF, Velkov T, Whittaker MR, Landersdorfer CB. Providing insight into the mechanism of action of cationic lipidated oligomers using metabolomics. mSystems 2024; 9:e0009324. [PMID: 38606960 PMCID: PMC11097639 DOI: 10.1128/msystems.00093-24] [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: 02/01/2024] [Accepted: 03/25/2024] [Indexed: 04/13/2024] Open
Abstract
The increasing resistance of clinically relevant microbes against current commercially available antimicrobials underpins the urgent need for alternative and novel treatment strategies. Cationic lipidated oligomers (CLOs) are innovative alternatives to antimicrobial peptides and have reported antimicrobial potential. An understanding of their antimicrobial mechanism of action is required to rationally design future treatment strategies for CLOs, either in monotherapy or synergistic combinations. In the present study, metabolomics was used to investigate the potential metabolic pathways involved in the mechanisms of antibacterial activity of one CLO, C12-o-(BG-D)-10, which we have previously shown to be effective against methicillin-resistant Staphylococcus aureus (MRSA) ATCC 43300. The metabolomes of MRSA ATCC 43300 at 1, 3, and 6 h following treatment with C12-o-(BG-D)-10 (48 µg/mL, i.e., 3× MIC) were compared to those of the untreated controls. Our findings reveal that the studied CLO, C12-o-(BG-D)-10, disorganized the bacterial membrane as the first step toward its antimicrobial effect, as evidenced by marked perturbations in the bacterial membrane lipids and peptidoglycan biosynthesis observed at early time points, i.e., 1 and 3 h. Central carbon metabolism and the biosynthesis of DNA, RNA, and arginine were also vigorously perturbed, mainly at early time points. Moreover, bacterial cells were under osmotic and oxidative stress across all time points, as evident by perturbations of trehalose biosynthesis and pentose phosphate shunt. Overall, this metabolomics study has, for the first time, revealed that the antimicrobial action of C12-o-(BG-D)-10 may potentially stem from the dysregulation of multiple metabolic pathways.IMPORTANCEAntimicrobial resistance poses a significant challenge to healthcare systems worldwide. Novel anti-infective therapeutics are urgently needed to combat drug-resistant microorganisms. Cationic lipidated oligomers (CLOs) show promise as new antibacterial agents against Gram-positive pathogens like methicillin-resistant Staphylococcus aureus (MRSA). Understanding their molecular mechanism(s) of antimicrobial action may help design synergistic CLO treatments along with monotherapy. Here, we describe the first metabolomics study to investigate the killing mechanism(s) of CLOs against MRSA. The results of our study indicate that the CLO, C12-o-(BG-D)-10, had a notable impact on the biosynthesis and organization of the bacterial cell envelope. C12-o-(BG-D)-10 also inhibits arginine, histidine, central carbon metabolism, and trehalose production, adding to its antibacterial characteristics. This work illuminates the unique mechanism of action of C12-o-(BG-D)-10 and opens an avenue to design innovative antibacterial oligomers/polymers for future clinical applications.
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Affiliation(s)
- Maytham Hussein
- Department of Biochemistry and Pharmacology, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Victoria, Australia
- Department of Pharmacology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Muhammad Bilal Hassan Mahboob
- Drug Delivery, Disposition, and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Jessica R. Tait
- Drug Delivery, Disposition, and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - James L. Grace
- Drug Delivery, Disposition, and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Véronique Montembault
- Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS–Le Mans Université, Le Mans, France
| | - Laurent Fontaine
- Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS–Le Mans Université, Le Mans, France
| | - John F. Quinn
- Drug Delivery, Disposition, and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
- Department of Chemical and Biological Engineering, Faculty of Engineering, Monash University, Clayton, Victoria, Australia
| | - Tony Velkov
- Department of Biochemistry and Pharmacology, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Victoria, Australia
- Department of Pharmacology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Michael R. Whittaker
- Drug Delivery, Disposition, and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Cornelia B. Landersdorfer
- Drug Delivery, Disposition, and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
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3
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Formulation and Biological Evaluation of Mesoporous Silica Nanoparticles Loaded with Combinations of Sortase A Inhibitors and Antimicrobial Peptides. Pharmaceutics 2022; 14:pharmaceutics14050986. [PMID: 35631572 PMCID: PMC9144937 DOI: 10.3390/pharmaceutics14050986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 04/28/2022] [Accepted: 05/02/2022] [Indexed: 12/04/2022] Open
Abstract
This study aimed to develop synergistic therapies to treat superbug infections through the encapsulation of sortase A inhibitors (SrtAIs; trans-chalcone (TC), curcumin (CUR), quercetin (QC), or berberine chloride (BR)) into MCM-41 mesoporous silica nanoparticles (MSNs) or a phosphonate-modified analogue (MCM-41-PO3−) to overcome their poor aqueous solubility. A resazurin-modified minimum inhibitory concentration (MIC) and checkerboard assays, to measure SrtAI synergy in combination with leading antimicrobial peptides (AMPs; pexiganan (PEX), indolicidin (INDO), and [I5, R8] mastoparan (MASTO)), were determined against methicillin-sensitive (MSSA) and methicillin-resistant (MRSA) Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa. The results demonstrated that the MCM-41 and MCM-41-PO3− formulations significantly improved the aqueous solubility of each SrtAI. The MICs for SrtAI/MCM-41-PO3− formulations were lower compared to the SrtAI/MCM-41 formulations against tested bacterial strains, except for the cases of BR/MCM-41 and QC/MCM-41 against P. aeruginosa. Furthermore, the following combinations demonstrated synergy: PEX with TC/MCM-41 (against all strains) or TC/MCM-41-PO3− (against all strains except P. aeruginosa); PEX with BR/MCM-41 or BR/MCM-41-PO3− (against MSSA and MRSA); INDO with QC/MCM-41 or QC/MCM-41-PO3− (against MRSA); and MASTO with CUR/MCM-41 (against E. coli). These combinations also reduced each components’ toxicity against human embryonic kidney cells. In conclusion, MCM-41 MSNs provide a platform to enhance SrtAI solubility and demonstrated antimicrobial synergy with AMPs and reduced toxicity, providing novel superbug treatment opportunities.
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Alharthi S, Ziora ZM, Moyle PM. Optimized protocols for assessing libraries of poorly soluble sortase A inhibitors for antibacterial activity against medically-relevant bacteria, toxicity and enzyme inhibition. Bioorg Med Chem 2021; 52:116527. [PMID: 34839159 DOI: 10.1016/j.bmc.2021.116527] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 11/07/2021] [Accepted: 11/16/2021] [Indexed: 10/19/2022]
Abstract
Increasing antimicrobial resistance is a major global health concern. Conventional antibiotics apply selection pressures, which promote the accumulation of resistant microbes. Anti-virulence strategies, in contrast, are less potent antimicrobials, but are less likely to select for resistance, can be combined with existing antibiotics to improve their activity, and in some cases can overcome antimicrobial resistance towards other antimicrobials. Sortase A inhibitors (SrtAIs) represent an exciting example of this class; however, many reported examples demonstrate poor water solubility, which complicates their biological assessment and activity. This includes reports that use antimicrobial concentrations of organic solvents or conditions that fail to solubilise these compounds for minimal inhibitory concentration (MIC) assessments. Herein, we report the first study to optimise screening processes for a library of prospective SrtAIs (trans-chalcone (TC), berberine (BR), curcumin (CUR), and quercetin (QC)), including comparative assessment of the effects of various co-solvent concentrations, along with comparative assessment of their antimicrobial activities against multiple disease relevant bacterial strains (methicillin-sensitive and resistant S. aureus, E. coli, and P. aeruginosa), inhibition of the sortase A enzyme, and toxicity towards mammalian cells (HEK-293), using these optimised conditions. Optimal solubility with minimal effect on bacterial viability was observed in the presence of 5% (v/v) dimethyl sulfoxide (DMSO)-Mueller-Hinton Broth. Three antimicrobial susceptibility tests (broth microdilution, agar dilution, and disk diffusion) were assessed for their ability to accurately determine minimal inhibitory concentration (MIC) data for each SrtAI. Broth microdilution and agar dilution were both effective; however, the broth microdilution assay required the addition of a colorimetric metabolic indicator (resazurin) to enable simple and reliable MIC determination due to the development of precipitants over time. In contrast, disk diffusion did not provide reliable zone of inhibition data. Identical MIC data was observed with methicillin-sensitive and -resistant S. aureus (MRSA; ATCC43300), with lower potency activity against E. coli and P. aeruginosa. Under these conditions, TC and CUR demonstrated significant toxicity towards human embryonic kidney (HEK-293) cells, with QC showing less toxicity and BR limited-to-no toxicity at its MIC. Overall, the findings of this work provide optimised processes, which will prove useful for the study of other poorly soluble antimicrobial agents and SrtAIs. The obtained data suggests that BR should be considered in preference to the other SrtAIs for the development of new antimicrobial formulations, based on its superior antimicrobial and SrtA inhibition potency, and greatly reduced toxicity.
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Affiliation(s)
- Sitah Alharthi
- School of Pharmacy, Pharmacy Australia Centre of Excellence, the University of Queensland, Woolloongabba 4102, Queensland, Australia
| | - Zyta Maria Ziora
- Institute for Molecular Bioscience, the University of Queensland, St Lucia 4072, Queensland, Australia
| | - Peter Michael Moyle
- School of Pharmacy, Pharmacy Australia Centre of Excellence, the University of Queensland, Woolloongabba 4102, Queensland, Australia.
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5
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Albayaty YN, Thomas N, Ramírez-García PD, Davis TP, Quinn JF, Whittaker MR, Prestidge CA. pH-Responsive copolymer micelles to enhance itraconazole efficacy against Candida albicans biofilms. J Mater Chem B 2021; 8:1672-1681. [PMID: 32016213 DOI: 10.1039/c9tb02586c] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Candida albicans (C. albicans) is a common fungal pathogen causing both localised and systemic infections. The majority of these infections are promoted by biofilm formation, providing a protective matrix for the embedded fungi thereby evading the host immune defence and promoting resistance against anti-mycotic agents. In this study, pH-responsive micellar systems based on poly-(ethylene glycol) ethyl ether methacrylate (PEGMA) and poly 2-(diethylamino) ethyl methacrylate (DEAEMA) block-copolymers of P(PEGMA-b-DEAEMA) were specifically developed and loaded with the antifungal itraconazole (ICZ) to defeat C. albicans biofilms. The P(PEGMA-b-DEAEMA) di-block polymer micelles demonstrated a particle size of 55 ± 6 nm and high ICZ loads (12.0 ± 0.5% w/w). Within the biofilm's acidic microenvironment, tertiary amines of the pH-sensitive DEAEMA block are protonated, altering their conformation and enhancing the release of the micellar contents. Encapsulation of ICZ within micelles significantly enhanced the activity against C. albicans biofilms, with a significant reduction in the biofilm biomass (>50%) and in the number of viable cells (2.4 Log reduction) achieved, compared with the non-encapsulated ICZ. Confocal microscopy revealed a high affinity and accumulation of the micelles in C. albicans biofilms as a result of their size and specific electrostatic interaction, hence their improved activity. P(PEGMA-b-DEAEMA) based pH-responsive micelles offer significant potential as antifungal carriers for controlling Candida infections.
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Affiliation(s)
- Yassamin N Albayaty
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia. and Basil Hetzel Institute for Translational Health Research, Woodville South, 5011, South Australia, Australia and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Australia
| | - Nicky Thomas
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia. and Basil Hetzel Institute for Translational Health Research, Woodville South, 5011, South Australia, Australia and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Australia
| | - Paulina D Ramírez-García
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Australia and Drug Delivery Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Pde, Parkville, VIC 3052, Australia
| | - Thomas P Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Australia and Drug Delivery Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Pde, Parkville, VIC 3052, Australia
| | - John F Quinn
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Australia and Drug Delivery Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Pde, Parkville, VIC 3052, Australia
| | - Michael R Whittaker
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Australia and Drug Delivery Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Pde, Parkville, VIC 3052, Australia
| | - Clive A Prestidge
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia. and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Australia
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François F, Nicolas C, Forcher G, Fontaine L, Montembault V. Poly(norbornenyl azlactone) as a versatile platform for sequential double click postpolymerization modification. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.110081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Zhao S, Huang W, Wang C, Wang Y, Zhang Y, Ye Z, Zhang J, Deng L, Dong A. Screening and Matching Amphiphilic Cationic Polymers for Efficient Antibiosis. Biomacromolecules 2020; 21:5269-5281. [PMID: 33226784 DOI: 10.1021/acs.biomac.0c01330] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The amphiphilic cationic polymers that mimic antimicrobial peptides have received increasing attention due to their excellent antibacterial activity. However, the relationship between the structure of cationic polymers and its antibacterial effect remains unclear. In our current work, a series of PEG blocked amphiphilic cationic polymers composed of hydrophobic alkyl-modified and quaternary ammonium salt (QAS) moieties have been prepared. The structure-antibacterial activity relationship of these cationic polymers was investigated against E. coli and S. aureus, including PEGylation, random structure, molecular weights, and the content and lengths of the hydrophobic alkyl side chains. The results indicated that PEGylated random amphiphilic cationic copolymer (mPB35/T57) showed stronger antibacterial activity and better biocompatibility than the random copolymer without PEG (PB33/T56). Furthermore, mPB35/T57 with appropriate mole fraction of alkyl side chains (falkyl = 0.38), degree of polymerization (DP = 92), and four-carbon hydrophobic alkyl moieties was found to have the optimal structure that revealed the best antibacterial activities against both E. coli (MIC = 8 μg/mL, selectivity > 250) and S. aureus (MIC = 4 μg/mL, selectivity > 500). More importantly, mPB35/T57 could effectively eradicate E. coli biofilms by killing the bacteria embedded in the biofilms. Therefore, the structure of mPB35/T57 provided valuable information for improving the antibacterial activity of cationic polymers.
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Affiliation(s)
- Shuyue Zhao
- Department of Polymer Science and Technology, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Wenjun Huang
- Department of Polymer Science and Technology, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Changrong Wang
- Department of Polymer Science and Technology, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Yaping Wang
- Department of Polymer Science and Technology, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - YuFeng Zhang
- Department of Polymer Science and Technology, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Zhanpeng Ye
- Department of Polymer Science and Technology, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Jianhua Zhang
- Department of Polymer Science and Technology, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Liandong Deng
- Department of Polymer Science and Technology, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Anjie Dong
- Department of Polymer Science and Technology, Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
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Ang CW, Tan L, Sykes ML, AbuGharbiyeh N, Debnath A, Reid JC, West NP, Avery VM, Cooper MA, Blaskovich MAT. Antitubercular and Antiparasitic 2-Nitroimidazopyrazinones with Improved Potency and Solubility. J Med Chem 2020; 63:15726-15751. [PMID: 33151678 PMCID: PMC7770830 DOI: 10.1021/acs.jmedchem.0c01372] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
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Following the approval of delamanid and pretomanid as new drugs
to treat drug-resistant tuberculosis, there is now a renewed interest
in bicyclic nitroimidazole scaffolds as a source of therapeutics against
infectious diseases. We recently described a nitroimidazopyrazinone
bicyclic subclass with promising antitubercular and antiparasitic
activity, prompting additional efforts to generate analogs with improved
solubility and enhanced potency. The key pendant aryl substituent
was modified by (i) introducing polar functionality to the methylene
linker, (ii) replacing the terminal phenyl group with less lipophilic
heterocycles, or (iii) generating extended biaryl side chains. Improved
antitubercular and antitrypanosomal activity was observed with the
biaryl side chains, with most analogs achieved 2- to 175-fold higher
activity than the monoaryl parent compounds, with encouraging improvements
in solubility when pyridyl groups were incorporated. This study has
contributed to understanding the existing structure–activity
relationship (SAR) of the nitroimidazopyrazinone scaffold against
a panel of disease-causing organisms to support future lead optimization.
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Affiliation(s)
- Chee Wei Ang
- Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Lendl Tan
- School of Chemistry and Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia.,Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
| | - Melissa L Sykes
- Discovery Biology, Griffith University, Nathan, Queensland 4111, Australia
| | - Neda AbuGharbiyeh
- Center for Discovery and Innovation in Parasitic Diseases, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92093, United States
| | - Anjan Debnath
- Center for Discovery and Innovation in Parasitic Diseases, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92093, United States
| | - Janet C Reid
- Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Nicholas P West
- School of Chemistry and Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia.,Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
| | - Vicky M Avery
- Discovery Biology, Griffith University, Nathan, Queensland 4111, Australia
| | - Matthew A Cooper
- Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia.,Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
| | - Mark A T Blaskovich
- Centre for Superbug Solutions, Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland 4072, Australia.,Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
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9
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Krawczyk P, Bratkowska M, Wybranowski T, Hołyńska-Iwan I, Cysewski P, Jędrzejewska B. Experimental and theoretical insight into spectroscopic properties and bioactivity of 4-(4-formylbenzylidene)-2-phenyloxazol-5(4H)-one dye for future applications in biochemistry. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113632] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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10
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Ho HT, Montembault V, Rollet M, Aboudou S, Mabrouk K, Pascual S, Fontaine L, Gigmes D, Phan TNT. Radical ring-opening polymerization of novel azlactone-functionalized vinyl cyclopropanes. Polym Chem 2020. [DOI: 10.1039/d0py00493f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Synthesis of new azlactone-functionalized vinyl cyclopropane monomers, corresponding (co)polymers and their reactivity with an amine compound.
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Affiliation(s)
- Hien The Ho
- Aix Marseille Univ
- CNRS
- Institut de Chimie Radicalaire UMR 7273
- Marseille
- France
| | - Véronique Montembault
- Institut des Molécules et Matériaux du Mans (IMMM) UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans cedex 9
- France
| | - Marion Rollet
- Aix Marseille Univ
- CNRS
- Institut de Chimie Radicalaire UMR 7273
- Marseille
- France
| | - Soioulata Aboudou
- Aix Marseille Univ
- CNRS
- Institut de Chimie Radicalaire UMR 7273
- Marseille
- France
| | - Kamel Mabrouk
- Aix Marseille Univ
- CNRS
- Institut de Chimie Radicalaire UMR 7273
- Marseille
- France
| | - Sagrario Pascual
- Institut des Molécules et Matériaux du Mans (IMMM) UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans cedex 9
- France
| | - Laurent Fontaine
- Institut des Molécules et Matériaux du Mans (IMMM) UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans cedex 9
- France
| | - Didier Gigmes
- Aix Marseille Univ
- CNRS
- Institut de Chimie Radicalaire UMR 7273
- Marseille
- France
| | - Trang N. T. Phan
- Aix Marseille Univ
- CNRS
- Institut de Chimie Radicalaire UMR 7273
- Marseille
- France
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