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Das R, Dash PP, Bishoyi AK, Mohanty P, Mishra L, Prusty L, Sahoo CR, Padhy RN, Mishra M, Sahoo H, Sahoo SK, Sethi SK, Jali BR. Antibacterial and cytotoxicity studies of pyrrolo-based organic scaffolds and their binding interaction with bovine serum albumin. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024:10.1007/s00210-024-03187-4. [PMID: 38829386 DOI: 10.1007/s00210-024-03187-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 05/24/2024] [Indexed: 06/05/2024]
Abstract
Two pyrrolo-based compounds, 1H-pyrrolo[3,2-b]pyridine-3-carboxylic acid (L1) and 1H-pyrrolo[3,2-c]pyridine-4-carboxylic acid (L2), were employed for the detection of bovine serum albumin (BSA) by UV-Vis and fluorescence spectroscopic methods in phosphate buffer solution (pH = 7). In the presence of L1 and L2, the fluorescence emission of BSA at 340 nm was quenched and concomitantly a red-shifted emission band appeared at 420 nm (L1)/450 nm (L2). The fluorescence spectral changes indicate the protein-ligand complex formation between BSA and L1/L2. An isothermal titration calorimetry (ITC) experiment was conducted to determine the binding ability between BSA and L1/L2. The binding constants are found to be 4.45 ± 0.22 × 104 M-1 for L1 and 2.29 ± 0.11 × 104 M-1 for L2, respectively. The thermodynamic parameters were calculated from ITC measurements (i.e. ∆rH = -40 ± 2 kcal/mol, ∆rG = -4.57 ± 0.22 kcal/mol and -T∆rS = 35.4 ± 1.77 kcal/mol), which indicated that the protein-ligand complex formation between L1/L2 with BSA is mainly due to the electrostatic interactions. The protein-ligand interactions were studied by performing molecular docking. Further, the antibacterial assay of L1 and L2 was conducted against gram-positive and gram-negative bacterial strains in an effort to address the difficulties caused by the co-occurrence of antimicrobial and multidrug-resistant bacteria. E. coli and S. aureus were significantly inhibited by L1 and L2. The L1 exhibits 13, 12 and 15 mm, whereas L2 exhibits a 2, 3 and 5 mm zone of inhibition against S. aureus, S. pyogenes and E. coli, respectively. In silico molecular docking of L1 and L2 was performed with bacterial DNA gyrase to establish the intermolecular interactions. Finally, the in vitro cytotoxicity activities of the ligands L1 and L2 have been carried out using drosophila.
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Affiliation(s)
- Rosalin Das
- School of Biotechnology, Gangadhar Meher University, Sambalpur, 768001, Odisha, India
| | - Pragyan P Dash
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, 768018, Odisha, India
| | - Ajit K Bishoyi
- Central Research Laboratory, Institute of Medical Sciences and SUM Hospital, Siksha 'O' Anusandhan Deemed University, Bhubaneswar, 751003, Odisha, India
| | - Patitapaban Mohanty
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, 768018, Odisha, India
| | - Lokanath Mishra
- Department of Life Science, National Institute of Technology, Rourkela, 769008, India
| | - Laxmipriya Prusty
- Department of Chemistry, National Institute of Technology, Rourkela, 769008, India
| | - Chita R Sahoo
- Central Research Laboratory, Institute of Medical Sciences and SUM Hospital, Siksha 'O' Anusandhan Deemed University, Bhubaneswar, 751003, Odisha, India
| | - Rabindra N Padhy
- Central Research Laboratory, Institute of Medical Sciences and SUM Hospital, Siksha 'O' Anusandhan Deemed University, Bhubaneswar, 751003, Odisha, India
| | - Monalisa Mishra
- Department of Life Science, National Institute of Technology, Rourkela, 769008, India
| | - Harekrushna Sahoo
- Department of Chemistry, National Institute of Technology, Rourkela, 769008, India
| | - Suban K Sahoo
- Department of Chemistry, SV National Institute of Technology, Surat, 395007, Gujarat, India
| | - Santosh K Sethi
- School of Biotechnology, Gangadhar Meher University, Sambalpur, 768001, Odisha, India.
| | - Bigyan R Jali
- Department of Chemistry, Veer Surendra Sai University of Technology, Burla, Sambalpur, 768018, Odisha, India.
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Su J, Wang Y, Zhong W, Wang M, Wang Y. A retrospective study on the effect of statins on mortality and antimicrobial resistance among patients with Staphylococcus aureus bloodstream infection. Arch Med Sci 2024; 20:675-678. [PMID: 38757026 PMCID: PMC11094813 DOI: 10.5114/aoms/187004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Accepted: 03/09/2024] [Indexed: 05/18/2024] Open
Abstract
Introduction There is insufficient evidence in statin on the treatment of Staphylococcus aureus (SA) infection, we observe and analyze the clinical outcomes and antibiotic resistance of SA bloodstream infections in patients who received statins. Methods A retrospective study was carried out in SA bloodstream infection of hospitalized patients from January 2018 to August 2023. The 30-day attributable mortality, 30-day all-cause mortality and clinical data of patients who received statins and non-statins were compared. Results A total of 74 patients with SA bloodstream infection were included, 32 (43.2%) patients received treatment with statins and 42 (56.8%) with non-statins. The incidence of methicillin-resistant SA (MRSA) was significantly lower in the statins group (15.6% vs. 38.1%, p = 0.034), however, no significant differences were observed in the mortality rate (p = 0.410). Conclusions This study revealed the superiority of statins in reducing incidence of MRSA among SA bloodstream infection patients, but statins do not improve the 30-day mortality rate.
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Affiliation(s)
- Jianwei Su
- Department of Clinical Pharmacy, Dongguan Tungwah Hospital, Dongguan, Guangdong, China
| | - Yixuan Wang
- Department of Pharmacy, Chang’an Hospital of Dongguan, Dongguan, Guangdong, China
| | - Wanping Zhong
- Department of Clinical Pharmacy, Dongguan Tungwah Hospital, Dongguan, Guangdong, China
| | - Mengzhi Wang
- Department of Pharmacy, Chang’an Hospital of Dongguan, Dongguan, Guangdong, China
| | - Yanhong Wang
- Department of Clinical Pharmacy, Dongguan Tungwah Hospital, Dongguan, Guangdong, China
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Zhang S, Zhang S, Wang Y, Zhang Y, Liang S, Fan S, Chen D, Liu G. Discovery of novel phenanthridone derivatives with anti-streptococcal activity. Arch Microbiol 2023; 205:371. [PMID: 37930433 DOI: 10.1007/s00203-023-03705-7] [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: 08/10/2023] [Revised: 10/08/2023] [Accepted: 10/11/2023] [Indexed: 11/07/2023]
Abstract
To address the growing health threat posed by drug-resistant pathogenic microorganisms, the development of novel antimicrobial medications with multiple mechanisms of action is in urgent demand. With traditional antibacterial drug resources challenging to push forward, developing new antibacterial drugs has become a hot spot in biomedical research. In this study, we tested the antibacterial activity of 119 phenanthridine derivatives via the antibacterial assay and obtained 5 candidates. The cytotoxicity assay showed one phenanthridine derivative, HCK20, was safe for mammalian cells below 125 µM. HCK20 was verified to possess significant antibacterial activity to Streptococcus spp., such as Streptococcus pneumoniae, Streptococcus agalactiae, Streptococcus suis, Streptococcus dysgalactiae, and Streptococcus equi with MICs ranging from 15 to 60 µM. Furthermore, we found that HCK20 probably achieved its bacterial inhibition by influencing the permeability of bacterial cell walls via interacting with Streptococcal penicillin-binding proteins (PBPs). Our results suggest that this phenanthridine derivative, HCK20, has great potential to become a novel antibacterial agent that can be a potent treatment for streptococcal infections.
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Affiliation(s)
- Shidan Zhang
- Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Sanya, China
| | - Shiyu Zhang
- OIE Reference Laboratory for Swine Streptococcosis, Nanjing Agricultural University, Nanjing, 210095, China
- Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Sanya, China
| | - Yiting Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Yumin Zhang
- School of Agriculture and Biology, Shanghai Key Laboratory of Veterinary Biotechnology, Shanghai Jiao Tong University, Shanghai, 201100, China
| | - Song Liang
- OIE Reference Laboratory for Swine Streptococcosis, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shirui Fan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Duozhi Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China.
| | - Guangjin Liu
- OIE Reference Laboratory for Swine Streptococcosis, Nanjing Agricultural University, Nanjing, 210095, China.
- Sanya Institute of Nanjing Agricultural University, Nanjing Agricultural University, Sanya, China.
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Melcrová A, Maity S, Melcr J, de Kok NAW, Gabler M, van der Eyden J, Stensen W, Svendsen JSM, Driessen AJM, Marrink SJ, Roos WH. Lateral membrane organization as target of an antimicrobial peptidomimetic compound. Nat Commun 2023; 14:4038. [PMID: 37419980 PMCID: PMC10328936 DOI: 10.1038/s41467-023-39726-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 06/20/2023] [Indexed: 07/09/2023] Open
Abstract
Antimicrobial resistance is one of the leading concerns in medical care. Here we study the mechanism of action of an antimicrobial cationic tripeptide, AMC-109, by combining high speed-atomic force microscopy, molecular dynamics, fluorescence assays, and lipidomic analysis. We show that AMC-109 activity on negatively charged membranes derived from Staphylococcus aureus consists of two crucial steps. First, AMC-109 self-assembles into stable aggregates consisting of a hydrophobic core and a cationic surface, with specificity for negatively charged membranes. Second, upon incorporation into the membrane, individual peptides insert into the outer monolayer, affecting lateral membrane organization and dissolving membrane nanodomains, without forming pores. We propose that membrane domain dissolution triggered by AMC-109 may affect crucial functions such as protein sorting and cell wall synthesis. Our results indicate that the AMC-109 mode of action resembles that of the disinfectant benzalkonium chloride (BAK), but with enhanced selectivity for bacterial membranes.
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Affiliation(s)
- Adéla Melcrová
- Molecular Biophysics, Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Groningen, the Netherlands
| | - Sourav Maity
- Molecular Biophysics, Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Groningen, the Netherlands
| | - Josef Melcr
- Molecular Dynamics, Groningen Biomolecular Sciences & Biotechnology Institute, Rijksuniversiteit Groningen, Groningen, the Netherlands
| | - Niels A W de Kok
- Molecular Microbiology, Groningen Biomolecular Sciences & Biotechnology Institute, Rijksuniversiteit Groningen, Groningen, the Netherlands
| | - Mariella Gabler
- Molecular Biophysics, Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Groningen, the Netherlands
| | - Jonne van der Eyden
- Molecular Biophysics, Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Groningen, the Netherlands
| | - Wenche Stensen
- Department of Chemistry, UiT Arctic University of Norway, Tromsø, Norway
| | - John S M Svendsen
- Department of Chemistry, UiT Arctic University of Norway, Tromsø, Norway
| | - Arnold J M Driessen
- Molecular Microbiology, Groningen Biomolecular Sciences & Biotechnology Institute, Rijksuniversiteit Groningen, Groningen, the Netherlands
| | - Siewert J Marrink
- Molecular Biophysics, Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Groningen, the Netherlands
- Molecular Dynamics, Groningen Biomolecular Sciences & Biotechnology Institute, Rijksuniversiteit Groningen, Groningen, the Netherlands
| | - Wouter H Roos
- Molecular Biophysics, Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Groningen, the Netherlands.
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Nanjundaswamy S, Bindhu S, Arun Renganathan RR, Nagashree S, Karthik CS, Mallu P, Ravishankar Rai V. Design, synthesis of pyridine coupled pyrimidinone/pyrimidinthione as anti-MRSA agent: Validation by molecular docking and dynamics simulation. J Biomol Struct Dyn 2022; 40:12106-12117. [PMID: 34424132 DOI: 10.1080/07391102.2021.1968496] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Methicillin Resistant Staphylococcus aureus (MRSA) is a major cause of severe hospital and infections acquired by the population and related morbidity and mortality. In this unique situation, there is a need of dynamic strong drug candidates to control MRSA diseases. Thus, the present work focuses on the synthesis and characterization of pyrimidinones and pyrimidinthiones coupled pyridine derivatives as anti-MRSA agent. The synthesized compounds were characterized by different spectroscopic techniques and evaluated against MRSA strain. Among them, 4e and 4 g possessed better antibacterial activity with MIC values of 10 μg and 8 μg respectively. The key determinant of the wide range beta-lactam resistance in MRSA strains is the Penicillin-Binding Protein 2a (PBP2a) but the gene encodes PBP2a which has a low affinity towards β-lactam antibiotics. Because of this, the present investigation focused on the mechanism of PBP2a protein binding studies by in-silico studies. The synthesized compounds showed very good interactions with PBP2A compared with standard drug Vancomycin, among them compound 4 g showed better interaction with the binding score of -9.8 kcal/mol. Antibacterial activity was validated with molecular docking and molecular dynamic simulation. Simulation results revealed that protein-ligand interactions of 4 g compound stably sustained up to 20,000ps.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- S Nanjundaswamy
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru, Karnataka, India
| | - S Bindhu
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru, Karnataka, India
| | - R R Arun Renganathan
- Department of Studies in Microbiology, University of Mysore, Mysuru, Karnataka, India
| | - S Nagashree
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru, Karnataka, India
| | - C S Karthik
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru, Karnataka, India
| | - P Mallu
- Department of Chemistry, SJCE, JSS Science and Technology University, Mysuru, Karnataka, India
| | - V Ravishankar Rai
- Department of Studies in Microbiology, University of Mysore, Mysuru, Karnataka, India
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6
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Oselusi S, Fadaka AO, Wyckoff GJ, Egieyeh SA. Computational Target-Based Screening of Anti-MRSA Natural Products Reveals Potential Multitarget Mechanisms of Action through Peptidoglycan Synthesis Proteins. ACS OMEGA 2022; 7:37896-37906. [PMID: 36312373 PMCID: PMC9609086 DOI: 10.1021/acsomega.2c05061] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/06/2022] [Indexed: 05/22/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is one of the leading causes of bacterial infections in both healthcare and community settings. MRSA can acquire resistance to any current antibiotic, which has major implications for its current and future treatment options. As such, it is globally a major focus for infection control efforts. The mechanical rigidity provided by peptidoglycans in the bacteria cell walls makes it a promising target for broad-spectrum antibacterial drug discovery. The development of drugs that can target different stages of the synthesis of peptidoglycan in MRSA may compromise the integrity of its cell wall and consequently result in the rapid decline of diseases associated with this drug-resistant bacteria. The present study is aimed at screening natural products with known in vitro activities against MRSA to identify their potential to inhibit the proteins involved in the biosynthesis of the peptidoglycan cell wall. A total of 262 compounds were obtained when a literature survey was conducted on anti-MRSA natural products (AMNPs). Virtual screening of the AMNPs was performed against various proteins (targets) that are involved in the biosynthesis of the peptidoglycan (PPC) cell wall using Schrödinger software (release 2020-3) to determine their binding affinities. Nine AMNPs were identified as potential multitarget inhibitors against peptidoglycan biosynthesis proteins. Among these compounds, DB211 showed the strongest binding affinity and interactions with six protein targets, representing three stages of peptidoglycan biosynthesis, and thus was selected as the most promising compound. The MD simulation results for DB211 and its proteins indicated that the protein-ligand complexes were relatively stable over the simulation period of 100 ns. In conclusion, DB211 showed the potential to inhibit six proteins involved in the biosynthesis of the peptidoglycan cell wall in MRSA, thus reducing the chance of MRSA developing resistance to this compound. Therefore, DB211 provided a starting point for the design of new compounds that can inhibit multiple targets in the biosynthesis of the peptidoglycan layer in MRSA.
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Affiliation(s)
- Samson
Olaitan Oselusi
- University
of the Western Cape, School of Pharmacy,
Faculty of Natural Sciences, Robert Sobukwe Road, Bellville, Cape Town, Western Cape ZA 7535, South Africa
| | - Adewale Oluwaseun Fadaka
- University
of the Western Cape, Science and Innovation/Mintek
Nanotechnology Innovation Centre, Department of Biotechnology, Faculty
of Natural Sciences, Robert
Sobukwe Road, Bellville, Cape Town, Western Cape ZA 7535, South Africa
| | - Gerald J. Wyckoff
- University
of Missouri Kansas City, School of Pharmacy,
Division of Pharmacology and Pharmaceutical Sciences, 5000 Holmes Street, Kansas
City, Missouri 64110-2446, United States
| | - Samuel Ayodele Egieyeh
- University
of the Western Cape, School of Pharmacy,
Faculty of Natural Sciences, Robert Sobukwe Road, Bellville, Cape Town, Western Cape ZA 7535, South Africa
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Panda G, Dash S, Sahu SK. Harnessing the Role of Bacterial Plasma Membrane Modifications for the Development of Sustainable Membranotropic Phytotherapeutics. MEMBRANES 2022; 12:914. [PMID: 36295673 PMCID: PMC9612325 DOI: 10.3390/membranes12100914] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/08/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
Membrane-targeted molecules such as cationic antimicrobial peptides (CAMPs) are amongst the most advanced group of antibiotics used against drug-resistant bacteria due to their conserved and accessible targets. However, multi-drug-resistant bacteria alter their plasma membrane (PM) lipids, such as lipopolysaccharides (LPS) and phospholipids (PLs), to evade membrane-targeted antibiotics. Investigations reveal that in addition to LPS, the varying composition and spatiotemporal organization of PLs in the bacterial PM are currently being explored as novel drug targets. Additionally, PM proteins such as Mla complex, MPRF, Lpts, lipid II flippase, PL synthases, and PL flippases that maintain PM integrity are the most sought-after targets for development of new-generation drugs. However, most of their structural details and mechanism of action remains elusive. Exploration of the role of bacterial membrane lipidome and proteome in addition to their organization is the key to developing novel membrane-targeted antibiotics. In addition, membranotropic phytochemicals and their synthetic derivatives have gained attractiveness as popular herbal alternatives against bacterial multi-drug resistance. This review provides the current understanding on the role of bacterial PM components on multidrug resistance and their targeting with membranotropic phytochemicals.
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Affiliation(s)
- Gayatree Panda
- Department of Biotechnology, Maharaja Sriram Chandra Bhanjadeo University (Erstwhile: North Orissa University), Baripada 757003, India
| | - Sabyasachi Dash
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY 10065, USA
| | - Santosh Kumar Sahu
- Department of Biotechnology, Maharaja Sriram Chandra Bhanjadeo University (Erstwhile: North Orissa University), Baripada 757003, India
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Verstraeten S, Catteau L, Boukricha L, Quetin-Leclercq J, Mingeot-Leclercq MP. Effect of Ursolic and Oleanolic Acids on Lipid Membranes: Studies on MRSA and Models of Membranes. Antibiotics (Basel) 2021; 10:antibiotics10111381. [PMID: 34827319 PMCID: PMC8615140 DOI: 10.3390/antibiotics10111381] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 12/21/2022] Open
Abstract
Staphylococcus aureus is an opportunistic pathogen and the major causative agent of life-threatening hospital- and community-acquired infections. A combination of antibiotics could be an opportunity to address the widespread emergence of antibiotic-resistant strains, including Methicillin-Resistant S. aureus (MRSA). We here investigated the potential synergy between ampicillin and plant-derived antibiotics (pentacyclic triterpenes, ursolic acid (UA) and oleanolic acid (OA)) towards MRSA (ATCC33591 and COL) and the mechanisms involved. We calculated the Fractional Inhibitory Concentration Index (FICI) and demonstrated synergy. We monitored fluorescence of Bodipy-TR-Cadaverin, propidium iodide and membrane potential-sensitive probe for determining the ability of UA and OA to bind to lipoteichoic acids (LTA), and to induce membrane permeabilization and depolarization, respectively. Both pentacyclic triterpenes were able to bind to LTA and to induce membrane permeabilization and depolarization in a dose-dependent fashion. These effects were not accompanied by significant changes in cellular concentration of pentacyclic triterpenes and/or ampicillin, suggesting an effect mediated through lipid membranes. We therefore focused on membranous effects induced by UA and OA, and we investigated on models of membranes, the role of specific lipids including phosphatidylglycerol and cardiolipin. The effect induced on membrane fluidity, permeability and ability to fuse were studied by determining changes in fluorescence anisotropy of DPH/generalized polarization of Laurdan, calcein release from liposomes, fluorescence dequenching of octadecyl-rhodamine B and liposome-size, respectively. Both UA and OA showed a dose-dependent effect with membrane rigidification, increase of membrane permeabilization and fusion. Except for the effect on membrane fluidity, the effect of UA was consistently higher compared with that obtained with OA, suggesting the role of methyl group position. All together the data demonstrated the potential role of compounds acting on lipid membranes for enhancing the activity of other antibiotics, like ampicillin and inducing synergy. Such combinations offer an opportunity to explore a larger antibiotic chemical space.
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Affiliation(s)
- Sandrine Verstraeten
- Université Catholique de Louvain, Louvain Drug Research Institute, Pharmacologie Cellulaire et Moléculaire, Avenue E. Mounier 73, UCL B1.73.05, 1200 Brussels, Belgium; (S.V.); (L.C.); (L.B.)
- Université Catholique de Louvain, de Duve Institute, Cellular Biology, Avenue Hippocrate 75, UCL B1.75.02, 1200 Brussels, Belgium
| | - Lucy Catteau
- Université Catholique de Louvain, Louvain Drug Research Institute, Pharmacologie Cellulaire et Moléculaire, Avenue E. Mounier 73, UCL B1.73.05, 1200 Brussels, Belgium; (S.V.); (L.C.); (L.B.)
- Université Catholique de Louvain, Louvain Drug Research Institute, Pharmacognosy, Avenue E. Mounier 73, UCL B1.73.05, 1200 Brussels, Belgium;
| | - Laila Boukricha
- Université Catholique de Louvain, Louvain Drug Research Institute, Pharmacologie Cellulaire et Moléculaire, Avenue E. Mounier 73, UCL B1.73.05, 1200 Brussels, Belgium; (S.V.); (L.C.); (L.B.)
| | - Joelle Quetin-Leclercq
- Université Catholique de Louvain, Louvain Drug Research Institute, Pharmacognosy, Avenue E. Mounier 73, UCL B1.73.05, 1200 Brussels, Belgium;
| | - Marie-Paule Mingeot-Leclercq
- Université Catholique de Louvain, Louvain Drug Research Institute, Pharmacologie Cellulaire et Moléculaire, Avenue E. Mounier 73, UCL B1.73.05, 1200 Brussels, Belgium; (S.V.); (L.C.); (L.B.)
- Correspondence:
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9
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Sankari SS, Dahms HU, Tsai MF, Lo YL, Wang LF. Comparative study of an antimicrobial peptide and a neuropeptide conjugated with gold nanorods for the targeted photothermal killing of bacteria. Colloids Surf B Biointerfaces 2021; 208:112117. [PMID: 34564040 DOI: 10.1016/j.colsurfb.2021.112117] [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: 08/04/2021] [Revised: 09/09/2021] [Accepted: 09/13/2021] [Indexed: 01/21/2023]
Abstract
There are certain disadvantages in treating bacterial infections through conventional methods. For this reason, the current study does focus on combating bacterial wound infections by photothermal therapy assisted by gold nanorod-peptide conjugates (GNR-peptide conjugates). Two peptides, the cationic antimicrobial peptide LL-37 and neuropeptide ANGIOPEP-2 both with specificity for targeted bacterial binding, were conjugated with GNR surface through electrostatic interactions. The GNR-peptide conjugates showed good biocompatibility, sufficient stability, enhanced targeting, potential photothermal killing of bacteria, and possible acceleration of wound healing. The photo-biomodulation properties of NIR improved the wound closure rates through enhanced cell migration. The multifunctional LL37-conjugated GNRs significantly enhanced photothermal therapeutic outcomes based on bacterial targeting with promising wound healing properties.
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Affiliation(s)
- Sivasoorian Siva Sankari
- Department of Medicinal & Applied Chemistry, College of Life Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Hans-Uwe Dahms
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung 807, Taiwan; Research Centre for Environmental Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan; Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
| | - Ming-Fong Tsai
- Department of Medicinal & Applied Chemistry, College of Life Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Yu-Lun Lo
- Department of Medicinal & Applied Chemistry, College of Life Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Li-Fang Wang
- Department of Medicinal & Applied Chemistry, College of Life Sciences, Kaohsiung Medical University, Kaohsiung 807, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan; Institute of Medical Science and Technology, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
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Adesanya EO, Sonibare MA, Ajaiyeoba EO, Egieyeh SA. Compounds isolated from hexane fraction of Alternanthera brasiliensis show synergistic activity against methicillin resistant Staphylococcus aureus. PHYSICAL SCIENCES REVIEWS 2021. [DOI: 10.1515/psr-2020-0113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Methicillin resistant Staphylococcus aureus (MRSA) has been classified as a “serious threat” by the centre for Disease Control, USA. Alternanthera brasiliensis plant, usually found on wasteland, belongs to the family Amaranthaceae. It is traditionally used for wound healing and has shown antimicrobial effect. Yet, this plant has not been fully explored for its antibacterial activity. Hence, this study evaluated isolated compounds from this plant for its activity against MRSA infections. The leaves extracts and fractions were prepared and concentrated in vacuo using a rotatory evaporator. Isolated compounds were obtained through vacuum liquid chromatographic (VLC) techniques and structurally elucidated with various spectroscopic techniques. Anti-MRSA assay of the fraction and compounds were evaluated by agar-well diffusion and broth-dilution methods while checkerboard assay was used to determine the fractional inhibitory concentration index (FICi). The Gas Chromatography-Mass Spectrometry (GCMS) and High Performance Liquid Chromatography (HPLC) analysis revealed fatty acid and carboxylic acid components like hexadecanoic acid, bis (2-ethylhexyl) phthalate and Fettsäure. The compounds AbHD1 and AbHD5 were identified as hexadecanoic acid and di (ethylhexyl) phthalate. Anti-MRSA assay shows that A. brasiliensis hexane fraction (AbHF) and the compounds had zones of inhibitions (Zi) ranging from 7.3 ± 0.5 to 17.5 ± 0.5 mm with minimum inhibitory concentrations (MIC) between 1.22 × 10−5 – 2.5 mg/mL. Synergistic effects were observed between AbHF and erythromycin, AbHF and ampicillin and AbHF and ciprofloxacin with FICi 0.208–0.375 in K1St4 strain while amoxicillin revealed antagonistic effects against M91 strain (4.67). Similarly, hexadecanoic acid and di (ethylhexyl) phthalate showed synergistic behaviour only with ampicillin against K1St4 while the rest were antagonistic. The study revealed that hexadecanoic acid and di (ethylhexyl) phthalate isolated from A. brasiliensis showed synergistic activity in variations against MRSA isolate and strains.
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Affiliation(s)
| | - Mubo Adeola Sonibare
- Department of Pharmacognosy , Faculty of Pharmacy, University of Ibadan , Ibadan , Nigeria
| | | | - Samuel Ayodele Egieyeh
- Pharmacology and Clinical Pharmacy , School of Pharmacy, University of the Western Cape , Cape Town , South Africa
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Prasad HN, Ananda A, Najundaswamy S, Nagashree S, Mallesha L, Dayananda B, Jayanth H, Mallu P. Design, synthesis and molecular docking studies of novel piperazine metal complexes as potential antibacterial candidate against MRSA. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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12
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XU Z, YIN N, REN R, RUAN Z. In silico analysis based on constituents of the medicinal plant Xuebijing (XBJ) to identify candidate treatment agents for sepsis in the omics-driven research era. MINERVA BIOTECNOL 2021. [DOI: 10.23736/s1120-4826.20.02684-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Mahesha, Hema MK, Karthik CS, Pampa KJ, Mallu P, Lokanath NK. Solvent induced mononuclear and dinuclear mixed ligand Cu( ii) complex: structural diversity, supramolecular packing polymorphism and molecular docking studies. NEW J CHEM 2020. [DOI: 10.1039/d0nj03567j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Phenolate bridged dinuclear and solvent induced mononuclear supramolecular isomers of Cu(ii) complex have been reported to explore the structural diversity and their antibacterial activity supported by molecular docking studies.
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Affiliation(s)
- Mahesha
- Department of Studies in Physics
- University of Mysore
- Mysuru-570 006
- India
| | - M. K. Hema
- Department of Studies in Physics
- University of Mysore
- Mysuru-570 006
- India
| | - C. S. Karthik
- Department of Chemistry
- SJCE
- JSS Science and Technology University
- Mysuru-570 006
- India
| | - K. J. Pampa
- Department of Biotechnology
- University of Mysore
- Mysuru-570 006
- India
| | - P. Mallu
- Department of Chemistry
- SJCE
- JSS Science and Technology University
- Mysuru-570 006
- India
| | - N. K. Lokanath
- Department of Studies in Physics
- University of Mysore
- Mysuru-570 006
- India
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