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Volynets GP, Iungin OS, Gudzera OI, Vyshniakova HV, Rybak MY, Moshynets OV, Balanda AO, Borovykov OV, Prykhod'ko AO, Lukashov SS, Maiula TH, Pletnova LV, Yarmoluk SM, Tukalo MA. Identification of novel antistaphylococcal hit compounds. J Antibiot (Tokyo) 2024; 77:665-678. [PMID: 38914797 DOI: 10.1038/s41429-024-00752-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/22/2024] [Accepted: 05/27/2024] [Indexed: 06/26/2024]
Abstract
Staphylococcus aureus is one of the most common nosocomial biofilm-forming pathogens worldwide that has developed resistance mechanisms against majority of the antibiotics. Therefore, the search of novel antistaphylococcal agents with unexploited mechanisms of action, especially with antibiofilm activity, is of great interest. Seryl-tRNA synthetase is recognized as a promising drug target for the development of antibacterials. We have carried out molecular docking of compounds with antistaphycoccal activity, which were earlier found by us using phenotypic screening, into synthetic site of S. aureus SerRS and found seven hit compounds with low inhibitory activity. Further, we have performed search of S. aureus SerRS inhibitors among compounds which were previously tested by us for inhibitory activity toward S. aureus ThrRS, that belong to the same class of aminoacyl-tRNA synthetases. Among them six hits were identified. We have selected four compounds for antibacterial study and found that the most active compound 1-methyl-3-(1H-imidazol-1-methyl-2-yl)-5-nitro-1H-indazole has MIC values toward S. aureus multidrug-resistant clinical isolates ranging from 78.12 to 156.2 µg/ml. However, this compound precipitated during anti-biofilm study. Therefore, we used 3-[N'-(2-hydroxy-3-methoxybenzylidene)hydrazino]-6-methyl-4H-[1,2,4]triazin-5-one with better solubility (ClogS value = 2.9) among investigated compounds toward SerRS for anti-biofilm study. It was found that this compound has a significant inhibitory effect on the growth of planktonic and biofilm culture of S. aureus 25923 with MIC value of 32 µg ml-1. At the same time, this compound does not reveal antibacterial activity toward Esherichia coli ATCC 47076. Therefore, this compound can be proposed as effective antiseptic toward multidrug-resistant biofilm-forming S. aureus isolates.
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Affiliation(s)
- Galyna P Volynets
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine.
| | - Olga S Iungin
- Department of Functional Genomics, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
| | - Olga I Gudzera
- Department of Protein Synthesis Enzymology, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
| | - Hanna V Vyshniakova
- Laboratory of Medical Microbiology with the Museum of Human Pathogenic Microorganisms, L.V. Gromashevsky Institute of Epidemiology and Infectious Diseases NAMS of Ukraine, 5 Amosova St., Kyiv, 03038, Ukraine
| | - Mariia Yu Rybak
- Department of Microbiology and Immunology, University of Texas Medical Branch, 301 University Blvd., Galveston, TX, 77555, USA
| | - Olena V Moshynets
- Biofilm study group, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
| | - Anatoliy O Balanda
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
| | - Oleksiy V Borovykov
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
| | - Andrii O Prykhod'ko
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
- Research and Development Department, Scientific Services Company Otava Ltd, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
| | - Sergiy S Lukashov
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
| | - Taras H Maiula
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
- Research and Development Department, Scientific Services Company Otava Ltd, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
| | - Larysa V Pletnova
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
| | - Sergiy M Yarmoluk
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
| | - Michael A Tukalo
- Department of Protein Synthesis Enzymology, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St., Kyiv, 03143, Ukraine
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Islam MR, Azmal M, Prima FS, Zaman B, Hossain MM, Mishu MA, Ghosh A. Retention of methicillin susceptibility in Staphylococcus aureus using natural adjuvant as an allosteric modifier of penicillin-binding protein 2a. Comput Biol Med 2024; 181:109070. [PMID: 39205340 DOI: 10.1016/j.compbiomed.2024.109070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 08/21/2024] [Accepted: 08/22/2024] [Indexed: 09/04/2024]
Abstract
The emergence of methicillin-resistant Staphylococcus aureus (MRSA) poses a significant global public health challenge due to its resistance to conventional antibiotics, primarily mediated by the mutated penicillin-binding protein, PBP2a. This study aims to investigate the potential of phytochemicals derived from medicinal plants in the Indian subcontinent to serve as adjuvants, enhancing the efficacy of methicillin against MRSA through allosteric modification of PBP2a using molecular docking and molecular dynamics (MD) simulation. After comprehensive Absorption, Distribution, Metabolism, and Excretion (ADME) profiling, along with AMES and hepatotoxicity tests, 9 compounds were shortlisted as suitable adjuvant candidates. Among them, nimbolide, quercetin, emodin, daidzein, eriodictyol, luteolin, and apigenin exhibited strong binding affinity to the allosteric site of PBP2a, with docking scores ranging from -8.7 to -7.3 kcal/mol. These phytochemicals facilitated enhanced methicillin binding, as evidenced by improved docking scores ranging from -6.1 to -6.8 kcal/mol, compared to -5.6 kcal/mol for methicillin alone. Molecular dynamics simulations confirmed the stability and favorable conformations of phytochemical-PBP2a complexes. Quercetin and daidzein were identified as the most promising adjuvant candidates, forming stable and energetically favorable complexes with PBP2a. Experimental validation showed that quercetin, at 30 mg/mL, effectively retained methicillin's antibacterial efficacy against MRSA. This study underscores the potential of natural compounds in overcoming antibiotic resistance and suggests that phytochemical-antibiotic synergism could be a viable strategy to combat multidrug-resistant bacterial infections.
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Affiliation(s)
- Md Rubiath Islam
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh
| | - Mahir Azmal
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh
| | - Fatema Sultana Prima
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh
| | - Bushra Zaman
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh
| | - Md Muluk Hossain
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh
| | - Moshiul Alam Mishu
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh
| | - Ajit Ghosh
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh.
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3
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Salazar M, Shahbazi Nia S, German NA, Awosile B, Sabiu S, Calle A. Exploring diflunisal as a synergistic agent against Staphylococcus aureus biofilm formation. Front Microbiol 2024; 15:1399996. [PMID: 39386371 PMCID: PMC11461217 DOI: 10.3389/fmicb.2024.1399996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 08/20/2024] [Indexed: 10/12/2024] Open
Abstract
Staphylococcus aureus is a bacterial pathogen of considerable significance in public health, capable of inducing a diverse range of infectious diseases. One of the most notorious mechanisms used by S. aureus to survive and colonize the site of infection is its ability to form biofilms. Diflunisal, a non-steroidal anti-inflammatory drug (NSAID), is a known inhibitor of the Agr system in S. aureus, which is key in regulating biofilm formation. This study evaluated the effect of broad-spectrum antibiotics in combination with diflunisal on S. aureus biofilm density. Eight antibiotics were tested independently at different concentrations and in combination with diflunisal to assess their effect on S. aureus biofilm formation. When using the antibiotics alone and with diflunisal, a significant control effect on biofilm formation was observed (p < 0.05), irrespective of diflunisal presence, but did not achieve a complete biofilm growth inhibition. Over time, diflunisal influenced biofilm formation; however, such an effect was correlated with antibiotic concentration and exposure time. With amikacin treatments, biofilm density increased with extended exposure time. In the case of imipenem, doripenem, levofloxacin, and ciprofloxacin, lower doses and absence of diflunisal showed higher control over biofilm growth with longer exposure. However, in all cases, diflunisal did not significantly affect the treatment effect on biofilm formation. In the absence of antibiotics, diflunisal significantly reduced biofilm formation by 53.12% (p < 0.05). This study suggests that diflunisal could be a potential treatment to control S. aureus biofilms, but it does not enhance biofilm inhibition when combined with antibiotics.
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Affiliation(s)
- Maria Salazar
- School of Veterinary Medicine, Texas Tech University, Amarillo, TX, United States
| | - Siavash Shahbazi Nia
- School of Pharmacy, Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center, Amarillo, TX, United States
| | - Nadezhda A. German
- School of Pharmacy, Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center, Amarillo, TX, United States
| | - Babafela Awosile
- School of Veterinary Medicine, Texas Tech University, Amarillo, TX, United States
| | - Saheed Sabiu
- Faculty of Applied Sciences, Department of Biotechnology and Food Science, Durban University of Technology, Durban, South Africa
| | - Alexandra Calle
- School of Veterinary Medicine, Texas Tech University, Amarillo, TX, United States
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Gaudreau A, Watson DW, Flannagan RS, Roy P, Shen C, Abdelmoneim A, Beavers WN, Gillies ER, El-Halfawy OM, Heinrichs DE. Mechanistic insights and in vivo efficacy of thiosemicarbazones against methicillin-resistant Staphylococcus aureus. J Biol Chem 2024; 300:107689. [PMID: 39159815 DOI: 10.1016/j.jbc.2024.107689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 07/27/2024] [Accepted: 08/07/2024] [Indexed: 08/21/2024] Open
Abstract
Staphylococcus aureus poses a significant threat in both community and hospital settings due to its infective and pathogenic nature combined with its ability to resist the action of chemotherapeutic agents. Methicillin-resistant S. aureus (MRSA) represents a critical challenge. Metal-chelating thiosemicarbazones (TSCs) have shown promise in combating MRSA and while previous studies hinted at the antimicrobial potential of TSCs, their mechanisms of action against MRSA are still under investigation. We screened a chemical library for anti-staphylococcal compounds and identified a potent molecule named R91 that contained the NNSN structural motif found within TSCs. We identified that R91 and several structural analogs exhibited antimicrobial activity against numerous S. aureus isolates as well as other Gram-positive bacteria. RNAseq analysis revealed that R91 induces copper and oxidative stress responses. Checkerboard assays demonstrated synergy of R91 with copper, nickel, and zinc. Mutation of the SrrAB two-component regulatory system sensitizes S. aureus to R91 killing, further linking the oxidative stress response to R91 resistance. Moreover, R91 was found to induce hydrogen peroxide production, which contributed to its antimicrobial activity. Remarkably, no mutants with elevated R91 resistance were identified, despite extensive attempts. We further demonstrate that R91 can be used to effectively treat an intracellular reservoir of S. aureus in cell culture and can reduce bacterial burdens in a murine skin infection model. Combined, these data position R91 as a potent TSC effective against MRSA and other Gram-positive bacteria, with implications for future therapeutic development.
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Affiliation(s)
- Avery Gaudreau
- Department of Microbiology and Immunology, The University of Western Ontario, London, Ontario, Canada
| | - David W Watson
- Department of Microbiology and Immunology, The University of Western Ontario, London, Ontario, Canada
| | - Ronald S Flannagan
- Department of Microbiology and Immunology, The University of Western Ontario, London, Ontario, Canada
| | - Paroma Roy
- Department of Microbiology and Immunology, The University of Western Ontario, London, Ontario, Canada
| | - Chenfangfei Shen
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada
| | - Ahmed Abdelmoneim
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana, USA; Louisiana Animal Disease Diagnostic Laboratory, Louisiana State University, Baton Rouge, Louisiana, USA
| | - William N Beavers
- Department of Pathobiological Sciences, Louisiana State University School of Veterinary Medicine, Baton Rouge, Louisiana, USA
| | - Elizabeth R Gillies
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada; Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario, Canada
| | - Omar M El-Halfawy
- Department of Chemistry and Biochemistry, University of Regina, Regina, Saskatchewan, Canada; Department of Microbiology and Immunology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - David E Heinrichs
- Department of Microbiology and Immunology, The University of Western Ontario, London, Ontario, Canada.
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Chisavu L, Chisavu F, Marc L, Mihaescu A, Bob F, Licker M, Ivan V, Schiller A. Bacterial Resistances and Sensibilities in a Tertiary Care Hospital in Romania-A Retrospective Analysis. Microorganisms 2024; 12:1517. [PMID: 39203360 PMCID: PMC11356133 DOI: 10.3390/microorganisms12081517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Revised: 07/20/2024] [Accepted: 07/22/2024] [Indexed: 09/03/2024] Open
Abstract
The increase in bacterial resistance is currently a global burden for the health care system. In order to evaluate the resistance rates of several bacteria from the most encountered cultures in clinical practice, we performed a retrospective analysis of all of the positive cultures from the year 2021 in a tertiary care hospital in Romania. Our analysis captured 3299 positive cultures. The median age of the patients was 62 years (IQR: 41-71 years old) with a slight predominance among females (53.1%). Overall, the most common cultures were urocultures, wound secretion cultures and blood cultures, and the most common identified bacteria were Escherichia coli, Staphylococcus aureus and Klebsiella spp. Positive cultures with the highest resistance rates were found in the bronchial aspirate cultures, catheter tip cultures, urocultures and blood cultures. Escherichia coli (n = 996) had the highest resistance to ampicillin (19.8%) and trimetoprim-sulfametoxazole (16.4%), while Staphylococcus aureus (n = 698) presented the highest resistance rates to clindamycin (27.4%) and oxaciline (19.7%). Klebsiella (n = 481) presented the highest resistance rates to piperaciline-tazobactam (25.2%) and ampicillin (20.4%), whereas Acinetobacter baumanii (n = 123) presented a resistance rate of more than 50% to carbapenems, gentamicin, ciprofloxacin and ceftazidime. The aim of our study was to identify bacterial resistance rates in order to provide updated clinical data to guide physicians in choosing the best empirical antibiotic treatment, especially in the west part of Romania.
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Affiliation(s)
- Lazar Chisavu
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania; (L.C.); (F.C.); (A.M.); (F.B.); (V.I.); (A.S.)
- Discipline of Nephrology, University of Medicine and Pharmacy “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania
| | - Flavia Chisavu
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania; (L.C.); (F.C.); (A.M.); (F.B.); (V.I.); (A.S.)
- “Louis Turcanu” Emergency County Hospital for Children, 300011 Timisoara, Romania
| | - Luciana Marc
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania; (L.C.); (F.C.); (A.M.); (F.B.); (V.I.); (A.S.)
- Discipline of Nephrology, University of Medicine and Pharmacy “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania
| | - Adelina Mihaescu
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania; (L.C.); (F.C.); (A.M.); (F.B.); (V.I.); (A.S.)
- Discipline of Nephrology, University of Medicine and Pharmacy “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania
| | - Flaviu Bob
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania; (L.C.); (F.C.); (A.M.); (F.B.); (V.I.); (A.S.)
- Discipline of Nephrology, University of Medicine and Pharmacy “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania
| | - Monica Licker
- Microbiology Department, Multidisciplinary Research Center of Antimicrobial Resistance, “Victor Babes” University of Medicine and Pharmacy, 300041 Timisoara, Romania;
- Microbiology Laboratory, “Pius Brinzeu” County Clinical Emergency Hospital, 300723 Timisoara, Romania
| | - Viviana Ivan
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania; (L.C.); (F.C.); (A.M.); (F.B.); (V.I.); (A.S.)
- Discipline of Cardiology, University of Medicine and Pharmacy “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania
| | - Adalbert Schiller
- Centre for Molecular Research in Nephrology and Vascular Disease, Faculty of Medicine “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania; (L.C.); (F.C.); (A.M.); (F.B.); (V.I.); (A.S.)
- Discipline of Nephrology, University of Medicine and Pharmacy “Victor Babes”, Eftimie Murgu Square No. 2, 300041 Timisoara, Romania
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Tyagi S, Singh RK, Kumar A. Lipophilic bioactive compounds from thermophilic cyanobacterium Leptolyngbya sp. HNBGU-004: Implications for countering VRSA resistance. Heliyon 2024; 10:e29754. [PMID: 38681559 PMCID: PMC11046194 DOI: 10.1016/j.heliyon.2024.e29754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 04/09/2024] [Accepted: 04/15/2024] [Indexed: 05/01/2024] Open
Abstract
Extremophiles thrive in extreme conditions, showcasing rich and unexplored diversity. This resilience hints at the existence of novel biochemical pathways and unique bioactive compounds. In contrast, the issue of drug resistance and excessive misuse of antibiotics in various settings, such as healthcare, agriculture, and veterinary medicine, has contributed to the emergence and spread of drug-resistant microorganisms. In the present research, Leptolyngbya sp. HNBGU-004, was obtained from an extreme location, a hot water spring in the Garhwal Himalayan region of India. The lipophilic fraction derived from Leptolyngbya sp. HNBGU-004 exhibited significant inhibitory effects against vancomycin-resistant Staphylococcus aureus (VRSA), displaying a bactericidal concentration of 0.5 mg mL-1. Furthermore, gas chromatography-mass spectrometry (GC-MS) analysis of the lipophilic extract unveiled the major constituents. Leptolyngbya sp. HNBGU-004 holds significant promise as a primary source of potent anti-vancomycin-resistant S. aureus components. These findings emphasize the importance of Leptolyngbya sp. HNBGU-004 as a foundational source for use as both a synergistic and alternative agent against VRSA.
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Affiliation(s)
- Sachin Tyagi
- Department of Microbiology, School of Life Sciences and Technology, IIMT University, Meerut, UP, 250001, India
| | - Rahul Kunwar Singh
- Department of Microbiology, H.N.B Garhwal University, Srinagar Garhwal, Uttarakhand, 246174, India
| | - Ashok Kumar
- Department of Biotechnology, School of Life Sciences and Technology, IIMT University, Meerut, UP, 250001, India
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Toufanian S, Mohammed J, Winterhelt E, Lofts A, Dave R, Coombes BK, Hoare T. A Nanocomposite Dynamic Covalent Cross-Linked Hydrogel Loaded with Fusidic Acid for Treating Antibiotic-Resistant Infected Wounds. ACS APPLIED BIO MATERIALS 2024; 7:1947-1957. [PMID: 38394042 DOI: 10.1021/acsabm.3c01293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is associated with high levels of morbidity and is considered a difficult-to-treat infection, often requiring nonstandard treatment regimens and antibiotics. Since over 40% of the emerging antibiotic compounds have insufficient solubility that limits their bioavailability and thus efficacy through oral or intravenous administration, it is crucial that alternative drug delivery products be developed for wound care applications. Existing effective treatments for soft tissue MRSA infections, such as fusidic acid (FA), which is typically administered orally, could also benefit from alternative routes of administration to improve local efficacy and bioavailability while reducing the required therapeutic dose. Herein, we report an antimicrobial poly(oligoethylene glycol methacrylate) (POEGMA)-based composite hydrogel loaded with fusidic acid-encapsulating self-assembled polylactic acid-b-poly(oligo(ethylene glycol) methyl ether methacrylate) (PLA-POEGMA) nanoparticles for the treatment of MRSA-infected skin wounds. The inclusion of the self-assembled nanoparticles (380 nm diameter when loaded with fusidic acid) does not alter the favorable mechanical properties and stability of the hydrogel in the context of its use as a wound dressing, while fusidic acid (FA) can be released from the hydrogel over ∼10 h via a diffusion-controlled mechanism. The antimicrobial studies demonstrate a clear zone of inhibition in vitro and a 1-2 order of magnitude inhibition of bacterial growth in vivo in an MRSA-infected full-thickness excisional murine wound model even at very low antibiotic doses. Our approach thus can both circumvent challenges in the local delivery of hydrophobic antimicrobial compounds and directly deliver antimicrobials into the wound to effectively combat methicillin-resistant infections using a fraction of the drug dose required using other clinically relevant strategies.
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Affiliation(s)
- Samaneh Toufanian
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Jody Mohammed
- Department of Biochemistry and Biomedical Sciences, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4K1, Canada
| | - Erica Winterhelt
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
| | - Andrew Lofts
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - Ridhdhi Dave
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Brian K Coombes
- Department of Biochemistry and Biomedical Sciences, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4K1, Canada
- Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Todd Hoare
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
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Banerjee D, Das M, Chatterjee A, Tank S, Aghera N. Prevalence of Antimicrobial Resistance in Saurashtra, Gujarat and Implications Toward Sustainable Healthcare. Indian J Microbiol 2024. [DOI: 10.1007/s12088-024-01209-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 01/17/2024] [Indexed: 10/01/2024] Open
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Yapa PN, Munaweera I, Sandaruwan C, Weerasinghe L, Weerasekera MM. Metal doped silica nanohybrids with extensive bacterial coverage for antibacterial applications exhibit synergistic activity. BIOMATERIALS ADVANCES 2024; 157:213753. [PMID: 38160632 DOI: 10.1016/j.bioadv.2023.213753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024]
Abstract
Nanotechnology has triumphantly overcome several barriers that have formed in modern life. Bacterial infections are a critical public health issue. They emphasized the failure of conventional treatments, high mortality and morbidity rates, antibiotic resistance, and other factors leading to the development of novel and affordable antibacterial medications. In this study, three types of metals (Ag, Cu, and Co) were doped separately into a silanol network in silica nanoparticles. The synthesized monometallic nanohybrids were combined in equal proportions to formulate bi and trimetallic nanohybrids. They were characterized structurally and morphologically. Fourier transform infrared (FTIR) and Raman spectroscopy studies were used to investigate the formation of the bonds and the pertinent peak positions. X-ray diffractograms (XRD) validated the crystalline structures of the metal nanohybrids. X-ray photoelectron spectroscopic study (XPS) confirmed the successful addition of metals to the silanol network. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images were used to characterize the morphology of nanohybrids and demonstrate their dimensions are on the nanoscale. The fraction of each metal doped in the silanol network was determined using energy dispersive spectroscopy (EDS) and atomic absorption spectrometry (AAS). To assess activity and confirm antibacterial synergy, the antibacterial activity of all synthesized nanohybrids was examined. The minimum inhibitory concentration-MIC (Ranged from 12.25 to 1560.00 μg/mL), minimum bactericidal concentration-MBC (Ranged from 197.00 to 3125.00 μg/mL), IC50 values (Ranged from 30.56 to 1683.00 μg/mL-) and fractional inhibitory concentration index (FICI) were determined and compared. Well diffusion assay was conducted against both ATCC cultures and clinical samples of gram-positive bacteria; Staphylococcus aureus (ATCC 25923), Streptococcus pneumoniae (ATCC 49619), MRSA (ATCC 33591) and gram-negative bacteria; Escherichia coli (ATCC 25922), Klebsiella pneumoniae (ATCC BAA 1706) and Pseudomonas aeruginosa (ATCC 27853). The highest synergistic radical scavenging performance of trimetallic nanohybrid (90.67 ± 0.095 %) was established by the DPPH (2,2 diphenyl-1-picrylhydrazil) experiment. Finally, when compared to monometallic nanohybrids, it was demonstrated that the synthesized multimetallic nanohybrids have a substantial potential as an emerging and cost-effective antibacterial agent.
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Affiliation(s)
- P N Yapa
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - I Munaweera
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka.
| | - C Sandaruwan
- Sri Lanka Institute of Nanotechnology (SLINTEC), Homagama 10200, Sri Lanka
| | - L Weerasinghe
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - M M Weerasekera
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
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Lavekar AG, Thakare R, Saima, Equbal D, Chopra S, Sinha AK. Indole-based aryl sulfides target the cell wall of Staphylococcus aureus without detectable resistance. Drug Dev Res 2024; 85:e22123. [PMID: 37840429 DOI: 10.1002/ddr.22123] [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: 07/10/2023] [Revised: 09/05/2023] [Accepted: 10/02/2023] [Indexed: 10/17/2023]
Abstract
Sulfur-containing classes of the scaffold "Arylthioindoles" have been evaluated for antibacterial activity; they demonstrated excellent potency against methicillin-resistant Staphylococcus aureus (MRSA) as well as against vancomycin-resistant strains and a panel of clinical isolates of resistant strains. In this study, we have elucidated the mechanism of action of lead compounds, wherein they target the cell wall of S. aureus. Further, S. aureus failed to develop resistance against two lead compounds tested in a serial passage experiment in the presence of the compounds over a period of 40 days. Both the compounds demonstrated comparable in vivo efficacy with vancomycin in a neutropenic mice thigh infection model. The results of these antibacterial activities emphasize the excellent potential of thioethers for developing novel antibiotics and may fill in as a target for the adjustment of accessible molecules to develop new powerful antibacterial agents with fewer side effects.
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Affiliation(s)
- Aditya G Lavekar
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
| | - Ritesh Thakare
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
- Department of Cell and Cancer Biology, UMass Chan Medical School, Worcester, Massachusetts, USA
| | - Saima
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
- School of Advanced Chemical Sciences, Solan, Himachal Pradesh, India
| | - Danish Equbal
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
| | - Sidharth Chopra
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
- Division of Molecular Microbiology and Immunology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Arun K Sinha
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
- Ranchi University, Ranchi, Jharkhand, India
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11
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Abusheraida NSA, AlBaker AAH, Aljabri ASA, Abdelrahman HA, Al-Mana H, Wilson GJ, Anan KA, Eltai NO. Rapid Visual Detection of Methicillin-Resistant Staphylococcus aureus in Human Clinical Samples via Closed LAMP Assay Targeting mecA and spa Genes. Microorganisms 2024; 12:157. [PMID: 38257983 PMCID: PMC10819026 DOI: 10.3390/microorganisms12010157] [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: 12/28/2023] [Revised: 01/11/2024] [Accepted: 01/11/2024] [Indexed: 01/24/2024] Open
Abstract
The emergence of antimicrobial resistance (AMR), particularly methicillin-resistant Staphylococcus aureus (MRSA), poses a significant global health threat as these bacteria increasingly become resistant to the most available therapeutic options. Thus, developing an efficient approach to rapidly screen MRSA directly from clinical specimens has become vital. In this study, we establish a closed-tube loop-mediated isothermal amplification (LAMP) method incorporating hydroxy-naphthol blue (HNB) colorimetric dye assay to directly detect MRSA from clinical samples based on the presence of mecA and spa genes. In total, 125 preidentified S. aureus isolates and 93 clinical samples containing S. aureus were sourced from the microbiology laboratory at Hamad General Hospital (HGH). The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were computed based on conventional PCR. The assay demonstrated 100% specificity, 91.23% sensitivity, 0.90 Cohen Kappa (CK), 100% PPV, and 87.8% NPV for the clinical samples, while clinical isolates exhibited 100% specificity, 97% sensitivity, 0.926 CK, 100% PPV, and 88.89% NPV. Compared to cefoxitin disk diffusion, LAMP provided 100% specificity and sensitivity, 1.00 CK, and 100% for PPV and NPV. The study revealed that the closed-tube LAMP incorporating (HNB) dye is a rapid technique with a turnaround time of less than 1 h and high specificity and sensitivity.
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Affiliation(s)
- Noora S. A. Abusheraida
- College of Health Science, Qatar University, Doha P.O. Box 2713, Qatar; (N.S.A.A.); (A.A.H.A.); (A.S.A.A.)
| | - Asraa A. H. AlBaker
- College of Health Science, Qatar University, Doha P.O. Box 2713, Qatar; (N.S.A.A.); (A.A.H.A.); (A.S.A.A.)
| | - Asmaa S. A. Aljabri
- College of Health Science, Qatar University, Doha P.O. Box 2713, Qatar; (N.S.A.A.); (A.A.H.A.); (A.S.A.A.)
| | - Hana A. Abdelrahman
- Biomedical Research Center, Qatar University, Doha P.O. Box 2713, Qatar; (H.A.A.); (H.A.-M.)
| | - Hassan Al-Mana
- Biomedical Research Center, Qatar University, Doha P.O. Box 2713, Qatar; (H.A.A.); (H.A.-M.)
| | - Godwin J. Wilson
- Laboratory Medicine and Pathology, Hamad General Hospital, Doha P.O. Box 3050, Qatar;
| | | | - Nahla O. Eltai
- Biomedical Research Center, Qatar University, Doha P.O. Box 2713, Qatar; (H.A.A.); (H.A.-M.)
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12
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Zhou Y, Liu MJ, Liao XY, Chen YT, Liao QX, Lin JD, Lin HR, Huang YH. New Attempts to Inhibit Methicillin-Resistant Staphylococcus aureus Biofilm? A Combination of Daptomycin and Azithromycin. Infect Drug Resist 2023; 16:7029-7040. [PMID: 37954509 PMCID: PMC10638656 DOI: 10.2147/idr.s433439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 10/09/2023] [Indexed: 11/14/2023] Open
Abstract
Objective To investigate the antibacterial impact of daptomycin and azithromycin in vitro on methicillin-resistant Staphylococcus aureus (MRSA) biofilm. Methods (1) Measure the strain growth curve and the biofilm formation curve. (2) Determine the minimum inhibitory concentrations (MICs) of daptomycin and azithromycin. (3) Investigate the antibacterial impact of the combination of daptomycin and azithromycin. (4) Perform the evaluation of the intervention impact of antimicrobial agents on MRSA biofilm. (5) Observe the biofilm after intervention with the antibacterial agent. Results (1) MRSA exhibited three phases: lag phase (0-4 h), logarithmic growth (4-8 h) and stationary phase after 18 h; its biofilm began to form at 6 h, semi-matured at 24 h, and reached maturity after 48 h. (2) The MICs of daptomycin and azithromycin were 8 μg/mL and greater than 256 μg/mL, respectively. (3) The combination of daptomycin and azithromycin has an additive effect on MRSA (Fractional Inhibitory Concentration Index [FICI] 0.625) (FICI = MIC of drug A in combination/MIC of drug A alone + MIC of drug B in combination/MIC of drug B alone). Evaluation criteria: Synergistic effect is considered when FICI ≤ 0.5; additive effect is considered when 0.5 < FICI ≤ 1; irrelevant effect is considered when 1 < FICI ≤ 2; antagonistic effect is considered when FICI > 2). (4) Daptomycin or azithromycin at MICs inhibited not only the growth of planktonic bacteria but also the formation of biofilm. (5) The combination of both, in which group the ratio of live/dead bacteria is low and the biofilm morphology was incomplete, was more productive than monotherapy in against biofilm. Conclusion Both daptomycin and azithromycin have anti-MRSA biofilm activity, and daptomycin is dominant. The fact that the combination of both can significantly inhibit the further maturation of MRSA biofilm and destroy already formed biofilm demonstrates the superiority of the combination over the monotherapy.
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Affiliation(s)
- Ye Zhou
- Department of Intensive Care Unit, First Affiliated Hospital of Fujian Medical University, Fuzhou, 350000, People’s Republic of China
| | - Ming-Jun Liu
- Department of Infection, People’s Hospital of YangJiang, YangJiang, 529500, People’s Republic of China
| | - Xiu-Yu Liao
- Department of Intensive Care Unit, First Affiliated Hospital of Fujian Medical University, Fuzhou, 350000, People’s Republic of China
| | - Yu-Ting Chen
- Department of Gastroenterology, Fuzhou NO. 1 Hospital, Fuzhou, 350000, People’s Republic of China
| | - Qiu-Xia Liao
- Department of Intensive Care Unit, First Affiliated Hospital of Fujian Medical University, Fuzhou, 350000, People’s Republic of China
| | - Jian-Dong Lin
- Department of Intensive Care Unit, First Affiliated Hospital of Fujian Medical University, Fuzhou, 350000, People’s Republic of China
| | - Hai-Rong Lin
- Department of Intensive Care Unit, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, People’s Republic of China
| | - Ying-Hong Huang
- Department of Intensive Care Unit, First Affiliated Hospital of Fujian Medical University, Fuzhou, 350000, People’s Republic of China
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13
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Song S, Jang H, Lee D, Jeong W, Bae EH, Kim H, Choi YS, Shin M, Kim SM, Jeon TJ. Portable Colorimetric Hydrogel Beads for Point-of-Care Antimicrobial Susceptibility Testing. ACS Sens 2023; 8:3754-3761. [PMID: 37801584 DOI: 10.1021/acssensors.3c01155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/08/2023]
Abstract
Sepsis is a life-threatening condition with systemic inflammatory responses caused by bacterial infections. Considering the emergence of antibiotic-resistant bacteria such as methicillin-resistant Staphylococcus aureus (MRSA), sepsis is a great threat to public health. The gold standard methods for antimicrobial susceptibility testing (AST), however, take at least approximately 3 days to implement the entire blood culture, pure culture, and AST processes. To overcome the time-consuming nature of conventional AST, a method employing a chromatic biosensor composed of poly(diacetylene), alginate, and LB broth (PAL) is introduced in this study. Compared to the gold standards, AST with PAL biosensors can be completed within a time frame as short as 16 h. Such a significant reduction in time is possible because the consecutive cultures and AST are carried out simultaneously by encapsulating the bacterial nutrients and detection molecules into a single component. The bead-like hydrogel sensors were used in their freeze-dried form, which endows them with portability and stability, thus making them adequate for point-of-care testing. The PAL biosensor yields minimum inhibitory concentrations comparable to those from the Clinical and Laboratory Standards Institute, and the applicability of the biosensor is further shown in MRSA-infected mice.
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Affiliation(s)
- Seoyoon Song
- Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea
| | - Huisoo Jang
- Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea
| | - Deborah Lee
- Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea
| | - Woojin Jeong
- Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea
| | - Eun Hwan Bae
- Department of Microbiology, College of Medicine, Inha University, Incheon 22212, Republic of Korea
| | - Hoon Kim
- Department of Emergency Medicine, Inje University Ilsan Paik Hospital, Goyang, Gyeonggi-do 10380, Republic of Korea
| | - Yong Sung Choi
- Department of Pediatrics, College of Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Minhye Shin
- Department of Microbiology, College of Medicine, Inha University, Incheon 22212, Republic of Korea
| | - Sun Min Kim
- Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea
- Department of Mechanical Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Tae-Joon Jeon
- Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea
- Department of Biological Engineering, Inha University, Incheon 22212, Republic of Korea
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14
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Malarvizhi K, Ramyadevi D, Vedha Hari BN, Sarveswari HB, Solomon AP, Fang H, Luo RH, Zheng YT. Mercuric-sulphide based metallopharmaceutical formulation as an alternative therapeutic to combat viral and multidrug-resistant (MDR) bacterial infections. Sci Rep 2023; 13:16706. [PMID: 37794044 PMCID: PMC10550948 DOI: 10.1038/s41598-023-43103-z] [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: 07/24/2023] [Accepted: 09/20/2023] [Indexed: 10/06/2023] Open
Abstract
According to the Global Antimicrobial Resistance and Use Surveillance System (GLASS) data, antibiotic resistance escalates more challenges in treatment against communicable diseases worldwide. Henceforth, the use of combinational antimicrobial therapy and metal-conjugated phytoconstituents composites are considered as alternatives. The present study explored the efficacy of mercuric-sulfide-based metallopharmaceutical, Sivanar Amirtham for anti-bacterial, anti-tuberculosis, anti-HIV therapeutics and toxicity profile by haemolytic assay, first of its kind. The anti-bacterial study was performed against both gram-positive and gram-negative pathogens including Staphylococcus aureus (ATCC 29213), Methicillin-resistant Staphylococcus aureus (MRSA: ATCC 43300), Enterococcus faecalis (ATCC 29212), Pseudomonas aeruginosa (PA14) and Vibrio cholerae (MTCC 3905) by agar well diffusion assay, wherein the highest zone of inhibition was identified for MRSA (20.7 mm) and V. cholerae (34.3 mm) at 25 mg/mL. Furthermore, the anti-tuberculosis activity experimented by microtitre alamar blue assay against M. tuberculosis (ATCC 27294) demonstrated significant activity at the concentration range of 12.5-100 µg/mL. Additionally, the anti-HIV efficacy established by the syncytia inhibition method using C8166 cell lines infected with HIV-1IIIB, showed a significant therapeutic effect. The in-vitro toxicity assay proved Sivanar Amirtham to be non-haemolytic and haemocompatible. The physicochemical characterization studies revealed the nano-sized particles with different functional groups and the distinctive metal-mineral complex could be attributed to the multi-site targeting ability. The rationale evidence and scientific validation for the efficacy of Sivanar Amirtham ensures that it could be proposed as an alternative or adjuvant for both prophylactics and therapeutics to overcome HIV infection and antimicrobial resistance as well as the multi-drug resistance challenges.
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Affiliation(s)
- Kootharasan Malarvizhi
- Pharmaceutical Technology Laboratory (#214, ASK-II), School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India
| | - Durai Ramyadevi
- Pharmaceutical Technology Laboratory (#214, ASK-II), School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India.
| | - B Narayanan Vedha Hari
- Pharmaceutical Technology Laboratory (#214, ASK-II), School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, 613401, India.
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363, Lodz, Poland.
| | - Hema Bhagavathi Sarveswari
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases, School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, 613401, India
| | - Adline Princy Solomon
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases, School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, 613401, India
| | - H Fang
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - R H Luo
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Y T Zheng
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
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15
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Mohamed TA, Abd El-Razek MH, Saleh IA, Ali SK, Abd El Aty AA, Paré PW, Hegazy MEF. Artemisia herba-alba sesquiterpenes: in silico inhibition in the ATP-binding pocket. RSC Adv 2023; 13:19530-19539. [PMID: 37388153 PMCID: PMC10301712 DOI: 10.1039/d3ra02690f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 06/20/2023] [Indexed: 07/01/2023] Open
Abstract
To identify antimicrobial leads for medical applications, metabolites from the aerial part of Artemisia herba-alba were extracted and chromatographically purified. Two new sesquiterpenes, 1β,8α-dihydroxyeudesm-4-en-6β,7α,11βH-12,6-olide (1) and 1β,6α,8α-trihydroxy, 11α-methyl-eudesma-4(15)-en-13-propanoate (2) along with a known eudesmanolide 11-epi-artapshin (3) were identified. Structures were determined by spectroscopic methods including 1D- and 2D-NMR as well as mass spectroscopy. Compound 3 inhibited Gram-positive bacteria Bacillus subtilis, Lactobacillus cereus and Staphylococcus aureus and exhibited antifungal activity against the pathogenic fungus F. solani. The mode-of-action of these antimicrobial sesquiterpenes as bacterial type II DNA topoisomerase and/or DNA gyrase B inhibitors were examined via in silico studies. Such molecular-docking studies were also employed to examine antifungal activity against an N-myristoyl transferase (NMT) target. Compound 3 had the greatest gyrase B binding affinity in the ATP-binding pocket and was found to possess an inhibitory action against non-invasive micro-test technology (NMT).
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Affiliation(s)
- Tarik A Mohamed
- Chemistry of Medicinal Plants Department, National Research Centre 33 El-Bohouth St., Dokki Giza 12622 Egypt +20-11-275-39-989 +20-33-371-635
| | - Mohamed H Abd El-Razek
- Department of Natural Compounds Chemistry, National Research Centre 33 El-Bohouth St., Dokki Giza 12622 Egypt
| | - Ibrahim A Saleh
- Chemistry of Medicinal Plants Department, National Research Centre 33 El-Bohouth St., Dokki Giza 12622 Egypt +20-11-275-39-989 +20-33-371-635
| | - Sherin K Ali
- Chemistry of Medicinal Plants Department, National Research Centre 33 El-Bohouth St., Dokki Giza 12622 Egypt +20-11-275-39-989 +20-33-371-635
| | - Abeer A Abd El Aty
- Chemistry of Natural and Microbial Products Department, National Research Centre 33 El-Bohouth St., Dokki Giza 12622 Egypt
| | - Paul W Paré
- Department of Chemistry & Biochemistry, Texas Tech University Lubbock TX 79409 USA
| | - Mohamed-Elamir F Hegazy
- Chemistry of Medicinal Plants Department, National Research Centre 33 El-Bohouth St., Dokki Giza 12622 Egypt +20-11-275-39-989 +20-33-371-635
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16
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Krátký M, Konečná K, Janďourek O, Diepoltová A, Vávrová P, Voxová B, Vejsová M, Bárta P, Bősze S. Insight into the Antibacterial Action of Iodinated Imine, an Analogue of Rafoxanide: a Comprehensive Study of Its Antistaphylococcal Activity. Microbiol Spectr 2023; 11:e0306422. [PMID: 37098945 PMCID: PMC10269765 DOI: 10.1128/spectrum.03064-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 04/03/2023] [Indexed: 04/27/2023] Open
Abstract
In this study, we have focused on a multiparametric microbiological analysis of the antistaphylococcal action of the iodinated imine BH77, designed as an analogue of rafoxanide. Its antibacterial activity against five reference strains and eight clinical isolates of Gram-positive cocci of the genera Staphylococcus and Enterococcus was evaluated. The most clinically significant multidrug-resistant strains, such as methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant S. aureus (VRSA), and vancomycin-resistant Enterococcus faecium, were also included. The bactericidal and bacteriostatic actions, the dynamics leading to a loss of bacterial viability, antibiofilm activity, BH77 activity in combination with selected conventional antibiotics, the mechanism of action, in vitro cytotoxicity, and in vivo toxicity in an alternative animal model, Galleria mellonella, were analyzed. The antistaphylococcal activity (MIC) ranged from 15.625 to 62.5 μM, and the antienterococcal activity ranged from 62.5 to 125 μM. Its bactericidal action; promising antibiofilm activity; interference with nucleic acid, protein, and peptidoglycan synthesis pathways; and nontoxicity/low toxicity in vitro and in vivo in the Galleria mellonella model were found to be activity attributes of this newly synthesized compound. In conclusion, BH77 could be rightfully minimally considered at least as the structural pattern for future adjuvants for selected antibiotic drugs. IMPORTANCE Antibiotic resistance is among the largest threats to global health, with a potentially serious socioeconomic impact. One of the strategies to deal with the predicted catastrophic future scenarios associated with the rapid emergence of resistant infectious agents lies in the discovery and research of new anti-infectives. In our study, we have introduced a rafoxanide analogue, a newly synthesized and described polyhalogenated 3,5-diiodosalicylaldehyde-based imine, that effectively acts against Gram-positive cocci of the genera Staphylococcus and Enterococcus. The inclusion of an extensive and comprehensive analysis for providing a detailed description of candidate compound-microbe interactions allows the valorization of the beneficial attributes linked to anti-infective action conclusively. In addition, this study can help with making rational decisions about the possible involvement of this molecule in advanced studies or may merit the support of studies focused on related or derived chemical structures to discover more effective new anti-infective drug candidates.
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Affiliation(s)
- Martin Krátký
- Charles University, Faculty of Pharmacy in Hradec Králové, Department of Organic and Bioorganic Chemistry, Hradec Králové, Czech Republic
| | - Klára Konečná
- Charles University, Faculty of Pharmacy in Hradec Králové, Department of Biological and Medical Sciences, Hradec Králové, Czech Republic
| | - Ondřej Janďourek
- Charles University, Faculty of Pharmacy in Hradec Králové, Department of Biological and Medical Sciences, Hradec Králové, Czech Republic
| | - Adéla Diepoltová
- Charles University, Faculty of Pharmacy in Hradec Králové, Department of Biological and Medical Sciences, Hradec Králové, Czech Republic
| | - Pavlína Vávrová
- Charles University, Faculty of Pharmacy in Hradec Králové, Department of Biological and Medical Sciences, Hradec Králové, Czech Republic
| | - Barbora Voxová
- Charles University, Faculty of Pharmacy in Hradec Králové, Department of Biological and Medical Sciences, Hradec Králové, Czech Republic
| | - Marcela Vejsová
- Charles University, Faculty of Pharmacy in Hradec Králové, Department of Biological and Medical Sciences, Hradec Králové, Czech Republic
| | - Pavel Bárta
- Charles University, Faculty of Pharmacy in Hradec Králové, Department of Biophysics and Physical Chemistry, Hradec Králové, Czech Republic
| | - Szilvia Bősze
- ELKH-ELTE Research Group of Peptide Chemistry, Budapest, Hungary
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17
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Silva V, Araújo S, Monteiro A, Eira J, Pereira JE, Maltez L, Igrejas G, Lemsaddek TS, Poeta P. Staphylococcus aureus and MRSA in Livestock: Antimicrobial Resistance and Genetic Lineages. Microorganisms 2023; 11:microorganisms11010124. [PMID: 36677414 PMCID: PMC9865216 DOI: 10.3390/microorganisms11010124] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 01/05/2023] Open
Abstract
Animal production is associated with the frequent use of antimicrobial agents for growth promotion and for the prevention, treatment, and control of animal diseases, thus maintaining animal health and productivity. Staphylococcus aureus, in particular methicillin-resistant S. aureus (MRSA), can cause a variety of infections from superficial skin and soft tissue infections to life-threatening septicaemia. S. aureus represents a serious public health problem in hospital and community settings, as well as an economic and animal welfare problem. Livestock-associated MRSA (LA-MRSA) was first described associated with the sequence (ST) 398 that was grouped within the clonal complex (CC) 398. Initially, LA-MRSA strains were restricted to CC398, but over the years it has become clear that its diversity is much greater and that it is constantly changing, a trend increasingly associated with multidrug resistance. Therefore, in this review, we aimed to describe the main clonal lineages associated with different production animals, such as swine, cattle, rabbits, and poultry, as well as verify the multidrug resistance associated with each animal species and clonal lineage. Overall, S. aureus ST398 still remains the most common clone among livestock and was reported in rabbits, goats, cattle, pigs, and birds, often together with spa-type t011. Nevertheless, a wide diversity of clonal lineages was reported worldwide in livestock.
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Affiliation(s)
- Vanessa Silva
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Department of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Associated Laboratory for Green Chemistry (LAQV-REQUIMTE), University NOVA of Lisboa, 1099-085 Lisbon, Portugal
| | - Sara Araújo
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Department of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
| | - Andreia Monteiro
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
| | - José Eira
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
| | - José Eduardo Pereira
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Veterinary and Animal Research Centre (CECAV), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
| | - Luís Maltez
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Veterinary and Animal Research Centre (CECAV), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
| | - Gilberto Igrejas
- Department of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Associated Laboratory for Green Chemistry (LAQV-REQUIMTE), University NOVA of Lisboa, 1099-085 Lisbon, Portugal
| | - Teresa Semedo Lemsaddek
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Centro de Investigação Interdisciplinar em Sanidade Animal (CIISA), Faculdade de Medicina Veterinária, Av. Universidade Técnica de Lisboa, 1300-477 Lisboa, Portugal
- Correspondence: (T.S.L.); (P.P.)
| | - Patricia Poeta
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Veterinary and Animal Research Centre (CECAV), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Correspondence: (T.S.L.); (P.P.)
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Zajmi A, Shiranee F, Gee Hoon Tang S, A.M. Alhoot M, Abdul Karim S. Multidrug-Resistant Staphylococcus aureus as Coloniser in Healthy Individuals. Infect Dis (Lond) 2022. [DOI: 10.5772/intechopen.108410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Staphylococcus aureus is a common human pathogen that can cause mild superficial infections to deep-seated abscesses and sepsis. One of the characteristics of S. aureus is the ability to colonise healthy individuals while leaving them asymptomatic. These carriers’ risk harbouring an antibiotic-resistant strain that may be harmful to the individual and the community. S. aureus carriage in healthcare personnel is being studied extensively in many parts of the world. However, the relationship between colonisation and disease among those with no previous exposure to healthcare remains untouched. Colonisation of the nasal cavity and its surrounding by pathogenic organisms such as S. aureus leads to the increased risk of infection. Hospital-acquired infections associated with S. aureus infections are common and studies related to these types of infections among various study groups are largely documented. However, over the last decade, an increase in community-associated methicillin-resistant S. aureus has been noted, increasing the need to identify the prevalence of the organism among healthy individuals and assessing the antibiotic resistance patterns. Systemic surveillance of the community for colonisation of S. aureus and identifying the antibiotic-resistant pattern is critical to determine the appropriate empiric antibiotic treatment.
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19
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Obanda BA, Cook EAJ, Fèvre EM, Bebora L, Ogara W, Wang SH, Gebreyes W, Ngetich R, Wandede D, Muyodi J, Blane B, Coll F, Harrison EM, Peacock SJ, Gitao GC. Characteristics of Staphylococcus aureus Isolated from Patients in Busia County Referral Hospital, Kenya. Pathogens 2022; 11:1504. [PMID: 36558838 PMCID: PMC9781741 DOI: 10.3390/pathogens11121504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/05/2022] [Accepted: 12/08/2022] [Indexed: 12/13/2022] Open
Abstract
Staphylococcus aureus is an important pathogen associated with hospital, community, and livestock-acquired infections, with the ability to develop resistance to antibiotics. Nasal carriage by hospital inpatients is a risk for opportunistic infections. Antibiotic susceptibility patterns, virulence genes and genetic population structure of S. aureus nasal isolates, from inpatients at Busia County Referral Hospital (BCRH) were analyzed. A total of 263 inpatients were randomly sampled, from May to July 2015. The majority of inpatients (85.9%) were treated empirically with antimicrobials, including ceftriaxone (65.8%) and metronidazole (49.8%). Thirty S. aureus isolates were cultured from 29 inpatients with a prevalence of 11% (10.3% methicillin-susceptible S. aureus (MSSA), 0.8% methicillin resistant S. aureus (MRSA)). Phenotypic and genotypic resistance was highest to penicillin-G (96.8%), trimethoprim (73.3%), and tetracycline (13.3%) with 20% of isolates classified as multidrug resistant. Virulence genes, Panton-Valentine leukocidin (pvl), toxic shock syndrome toxin-1 (tsst-1), and sasX gene were detected in 16.7%, 23.3% and 3.3% of isolates. Phylogenetic analysis showed 4 predominant clonal complexes CC152, CC8, CC80, and CC508. This study has identified that inpatients of BCRH were carriers of S. aureus harbouring virulence genes and resistance to a range of antibiotics. This may indicate a public health risk to other patients and the community.
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Affiliation(s)
- Benear Apollo Obanda
- Department of Veterinary Pathology, Microbiology and Parasitology, University of Nairobi, Nairobi P.O. Box 29053-00625, Kenya
- Global One Health Initiative, Office of International Affairs, The Ohio State University, Columbus, OH 43210, USA
- Centre for Microbiology Research Nairobi, Kenya Medical Research Institute, Nairobi P.O. Box 54840-00200, Kenya
| | | | - Eric M. Fèvre
- International Livestock Research Institute, Nairobi P.O. Box 30709-00100, Kenya
- Institute of Infection, Veterinary & Ecological Sciences, Leahurst Campus, University of Liverpool, Chester High Road, Neston CH64 7TE, UK
| | - Lilly Bebora
- Department of Veterinary Pathology, Microbiology and Parasitology, University of Nairobi, Nairobi P.O. Box 29053-00625, Kenya
| | - William Ogara
- Department of Public Health, Pharmacology and Toxicology, University of Nairobi, Nairobi P.O. Box 29053-00625, Kenya
| | - Shu-Hua Wang
- Global One Health Initiative, Office of International Affairs, The Ohio State University, Columbus, OH 43210, USA
- Division of Infectious Disease, Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Wondwossen Gebreyes
- Global One Health Initiative, Office of International Affairs, The Ohio State University, Columbus, OH 43210, USA
- Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Ronald Ngetich
- Centre for Microbiology Research Nairobi, Kenya Medical Research Institute, Nairobi P.O. Box 54840-00200, Kenya
| | - Dolphine Wandede
- Centre for Microbiology Research Nairobi, Kenya Medical Research Institute, Nairobi P.O. Box 54840-00200, Kenya
| | - Johnstone Muyodi
- The Centre for Infectious and Parasitic Diseases Control Research, Busia P.O. Box 3-50400, Kenya
| | - Beth Blane
- Department of Medicine, University of Cambridge, Cambridge CB2 2QQ, UK
| | - Francesc Coll
- Department of Infection Biology, London School of Hygiene and Tropical Medicine, University of London, London WC1E 7HT, UK
| | - Ewan M. Harrison
- Department of Medicine, University of Cambridge, Cambridge CB2 2QQ, UK
- Wellcome Sanger Institute, Hinxton CB10 1SA, UK
- Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, UK
| | - Sharon J. Peacock
- Department of Medicine, University of Cambridge, Cambridge CB2 2QQ, UK
| | - George C. Gitao
- Department of Veterinary Pathology, Microbiology and Parasitology, University of Nairobi, Nairobi P.O. Box 29053-00625, Kenya
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20
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Shahin IG, Mohamed KO, Taher AT, Mayhoub AS, Kassab AE. The Anti-MRSA Activity of Phenylthiazoles: A Comprehensive Review. Curr Pharm Des 2022; 28:3469-3477. [PMID: 36424796 DOI: 10.2174/1381612829666221124112006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 10/06/2022] [Accepted: 10/27/2022] [Indexed: 11/26/2022]
Abstract
Antimicrobial resistance is an aggravating global issue therefore it has been under extensive research in an attempt to reduce the number of antibiotics that are constantly reported as obsolete jeopardizing the lives of millions worldwide. Thiazoles possess a reputation as one of the most diverse biologically active nuclei, and phenylthiazoles are no less exceptional with an assorted array of biological activities such as anthelmintic, insecticidal, antimicrobial, antibacterial, and antifungal activity. Recently phenyl thiazoles came under the spotlight as a scaffold having strong potential as an anti-MRSA lead compound. It is a prominent pharmacophore in designing and synthesizing new compounds with antibacterial activity against multidrug-resistant bacteria such as MRSA, which is categorized as a serious threat pathogen, that exhibited concomitant resistance to most of the first-line antibiotics. MRSA has been associated with soft tissue and skin infections resulting in high death rates, rapid dissemination, and loss of millions of dollars of additional health care costs. In this brief review, we have focused on the advances of phenylthiazole derivatives as potential anti-MRSA from 2014 to 2021. The review encompasses the effect on biological activity due to combining this molecule with various synthetic pharmacophores. The physicochemical aspects were correlated with the pharmacokinetic properties of the reviewed compounds to reach a structure-activity relationship profile. Lead optimization of phenyl thiazole derivatives has additionally been outlined where the lipophilicity of the compounds was balanced with the metabolic stability and oral solubility to aid the researchers in medicinal chemistry, design, and synthesizing effective anti- MRSA phenylthiazoles in the future.
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Affiliation(s)
- Inas G Shahin
- Department of Organic Chemistry, Faculty of Pharmacy, October University for Modern Sciences and Arts, Giza 11787, Egypt
| | - Khaled O Mohamed
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt
| | - Azza T Taher
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt.,Department of Pharmaceutical Organic Chemistry, College of Pharmacy, October 6 University, 6-October, Giza, Egypt
| | - Abdelrahman S Mayhoub
- Department of Pharmaceutical Organic Chemistry, College of Pharmacy, Al-Azhar University, Cairo 11884, Egypt.,University of Science and Technology, Nanoscience Program, Zewail City of Science and Technology, October Gardens, 6th October, Giza 12578, Egypt
| | - Asmaa E Kassab
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt
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21
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Omobolanle Adesanya E, Daniel Ogunlakin A. Potential Use of African Botanicals and Other Compounds in the Treatment of Methicillin-Resistant Staphylococcus aureus Infections. Infect Dis (Lond) 2022. [DOI: 10.5772/intechopen.108351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Infections caused by the group of Staphylococcus bacteria are commonly called Staph infections, and over 30 types of Staphylococcal bacteria exist with Staphylococcus aureus causing about 90% of the infections from the genus. Staphylococcus aureus (S. aureus) is a major cause of both hospital- and community-acquired infections with major concern arising from its strain of species that is resistant to many antibiotics. One of such strain is the Methicillin-resistant Staphylococcus aureus (MRSA) that has been described to be a resistance to methicillin drugs. Another is glycopeptides-resistant emerging from the increased use of glycopeptides drugs. This continuous emergence and spread of new resistant strains of S. aureus is a major challenge which makes the search for novel anti-resistant agents imperative. The development of vaccines from natural and synthetic products is some of the measures being proposed for the protection against the infections. Also, the development of monoclonal or polyclonal antibodies for passive immunization is sought for, and attentions with regard to arriving at successful trials have been directed back to medicinal plant research as an alternative. This review discusses the treatment strategies of MRSA, the antibacterial property of various medicinal plants, and the influence of their active compounds on methicillin-resistant S. aureus (MRSA), as well as to recommend the path to future research in this area.
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22
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Phytochemical, Antimicrobial, Antidiabetic, Thrombolytic, Anticancer Activities, and In silico Studies of Ficus palmata Forssk. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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23
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Konečná K, Diepoltová A, Holmanová P, Jand’ourek O, Vejsová M, Voxová B, Bárta P, Maixnerová J, Trejtnar F, Kučerová-Chlupáčová M. Comprehensive insight into anti-staphylococcal and anti-enterococcal action of brominated and chlorinated pyrazine-based chalcones. Front Microbiol 2022; 13:912467. [PMID: 36060765 PMCID: PMC9428509 DOI: 10.3389/fmicb.2022.912467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 07/15/2022] [Indexed: 12/03/2022] Open
Abstract
The greatest threat and medicinal impact within gram-positive pathogens are posed by two bacterial genera, Staphylococcus and Enterococcus. Chalcones have a wide range of biological activities and are recognized as effective templates in medicinal chemistry. This study provides comprehensive insight into the anti-staphylococcal and anti-enterococcal activities of two recently published brominated and chlorinated pyrazine-based chalcones, CH-0y and CH-0w. Their effects against 4 reference and 12 staphylococcal and enterococcal clinical isolates were evaluated. Bactericidal action, the activity in combination with selected conventional antibiotics, the study of post-antimicrobial effect (PAE, PAE/SME), and in vitro and in vivo toxicity, were included. In CH-0y, anti-staphylococcal activity ranging from MIC = 15.625 to 62.5 μM, and activity against E. faecium from 31.25 to 62.5 μM was determined. In CH-0w, anti-staphylococcal activity ranging from 31.25 to 125 μM, and activity against E. faecium and E. faecalis (62.5 μM) was revealed. Both CH-0y and CH-0w showed bactericidal action, beneficial impact on bacterial growth delay within PAE and PAE/SME studies, and non/low toxicity in vivo. Compared to CH-0w, CH-0y seems to have higher anti-staphylococcal and less toxic potential. In conclusion, chalcones CH-0y and CH-0w could be considered as structural pattern for future adjuvants to selected antibiotic drugs.
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Affiliation(s)
- Klára Konečná
- Department of Biological and Medical Sciences, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czechia
- *Correspondence: Klára Konečná,
| | - Adéla Diepoltová
- Department of Biological and Medical Sciences, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czechia
| | - Pavlína Holmanová
- Department of Biological and Medical Sciences, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czechia
| | - Ondřej Jand’ourek
- Department of Biological and Medical Sciences, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czechia
| | - Marcela Vejsová
- Department of Biological and Medical Sciences, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czechia
| | - Barbora Voxová
- Department of Biological and Medical Sciences, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czechia
| | - Pavel Bárta
- Department of Biophysics and Physical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czechia
| | - Jana Maixnerová
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czechia
| | - František Trejtnar
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czechia
| | - Marta Kučerová-Chlupáčová
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czechia
- Marta Kučerová-Chlupáčová,
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24
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Zhu H, Luo H, Zhong Q, Cao X, Gu S, Peng S, Xiao Y, Chen Y, Hang Y, Fang X, Zou S, Yu F, Hu L. Comparison of Molecular Characteristics Between Methicillin-Resistant and -Susceptible Staphylococcus aureus Clinical Isolates by Whole-Genome Sequencing. Infect Drug Resist 2022; 15:2949-2958. [PMID: 35706925 PMCID: PMC9190744 DOI: 10.2147/idr.s359654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 05/12/2022] [Indexed: 11/23/2022] Open
Abstract
Introduction The transmission of methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-susceptible Staphylococcus aureus (MSSA) are great public health concern worldwide. To better understand S. aureus evolution and dissemination, we compared the molecular features of MSSA and MRSA isolates. Methods In this study, 74 MSSA and 102 MRSA non-duplicate isolates were recovered from clinical samples between 2016 and 2020. Molecular epidemiology, antimicrobial resistance determinants, and virulence gene profiles were carried out by whole-genome sequencing (WGS). Results Twenty distinct sequence types were identified in MRSA isolates, with the most common being ST59, ST630, and ST338. The major genotypes of MSSA were ST188 and ST7. The toxin genes clfA, sek, and seq were significantly associated with MRSA, while splA/B, clfB, map, sdrC/D, and sem-sen-seo-seu were detected more frequently in MSSA isolates than MRSA (P < 0.05). The tst positive isolates were more commonly identified in CC1 and CC72, whereas lukE/D was mainly found in the CC7, CC15, CC88, and completely absent in CC59 clones. Conclusion Our results compared the genetic diversity between MRSA and MSSA strains, suggesting efforts to fight infections caused by MSSA need to be intensified due to MSSA isolates carrying wide range of virulence factors. Comparative epidemiological studies of large populations of MSSA and MRSA will be necessary in the future to understand how MSSA and MRSA populations may co-evolve and interact in the future.
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Affiliation(s)
- Hongying Zhu
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Hong Luo
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Qiaoshi Zhong
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Xingwei Cao
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Shumin Gu
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Suqin Peng
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Yanping Xiao
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Yanhui Chen
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Yaping Hang
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Xueyao Fang
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Shan Zou
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Fangyou Yu
- Department of Clinical Laboratory Medicine, Shanghai Pulmonary Hospital, Tongji UniversitySchool of Medicine, Shanghai, 200082, People's Republic of China
| | - Longhua Hu
- Department of Clinical Laboratory Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
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25
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Shah RA, Hsu JI, Patel RR, Mui UN, Tyring SK. Antibiotic resistance in dermatology: The scope of the problem and strategies to address it. J Am Acad Dermatol 2022; 86:1337-1345. [PMID: 34555484 DOI: 10.1016/j.jaad.2021.09.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 08/26/2021] [Accepted: 09/10/2021] [Indexed: 01/05/2023]
Abstract
Antibiotic resistance is a growing health concern that has attracted increasing attention from clinicians and scientists in recent years. Although resistance is an inevitable consequence of bacterial evolution and natural selection, misuse and overuse of antibiotics play a significant role in its acceleration. Antibiotics are the mainstay of therapy for common dermatoses, including acne and rosacea, as well as for skin and soft tissue infections. Therefore, it is critical for dermatologists and physicians across all disciplines to identify, appropriately manage, and prevent cases of antibiotic resistance. This review explores dermatologic conditions in which the development of antibiotic resistance is a risk and discusses mechanisms underlying the development of resistance. We discuss disease-specific strategies for overcoming resistant strains and improving antimicrobial stewardship along with recent advances in the development of novel approaches to counter antibiotic resistance.
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Affiliation(s)
- Radhika A Shah
- Department of Internal Medicine, Baylor University Medical Center, Dallas, Texas.
| | | | - Ravi R Patel
- Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Uyen Ngoc Mui
- Department of Dermatology, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Stephen K Tyring
- Center for Clinical Studies, Houston, Texas; Department of Dermatology, McGovern Medical School at UTHealth, Houston, Texas
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26
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Volynets GP, Barthels F, Hammerschmidt SJ, Moshynets OV, Lukashov SS, Starosyla SA, Vyshniakova HV, Iungin OS, Bdzhola VG, Prykhod'ko AO, Syniugin AR, Sapelkin VM, Yarmoluk SM, Schirmeister T. Identification of novel small-molecular inhibitors of Staphylococcus aureus sortase A using hybrid virtual screening. J Antibiot (Tokyo) 2022; 75:321-332. [PMID: 35440771 PMCID: PMC9016125 DOI: 10.1038/s41429-022-00524-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 03/30/2022] [Accepted: 04/06/2022] [Indexed: 01/18/2023]
Abstract
Staphylococcus aureus is one of the most dangerous pathogens commonly associated with high levels of morbidity and mortality. Sortase A is considered as a promising molecular target for the development of antistaphylococcal agents. Using hybrid virtual screening approach and FRET analysis, we have identified five compounds able to decrease the activity of sortase A by more than 50% at the concentration of 200 µM. The most promising compound was 2-(2-amino-3-chloro-benzoylamino)-benzoic acid which was able to inhibit S. aureus sortase A at the IC50 value of 59.7 µM. This compound was selective toward sortase A compared to other four cysteine proteases - cathepsin L, cathepsin B, rhodesain, and the SARS-CoV2 main protease. Microscale thermophoresis experiments confirmed that this compound bound sortase A with KD value of 189 µM. Antibacterial and antibiofilm assays also confirmed high specificity of the hit compound against two standard and three wild-type, S. aureus hospital infection isolates. The effect of the compound on biofilms produced by two S. aureus ATCC strains was also observed suggesting that the compound reduced biofilm formation by changing the biofilm structure and thickness.
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Affiliation(s)
- Galyna P Volynets
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St, 03143, Kyiv, Ukraine.
| | - Fabian Barthels
- Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg-University of Mainz, Staudinger Weg 5, 55128, Mainz, Germany
| | - Stefan J Hammerschmidt
- Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg-University of Mainz, Staudinger Weg 5, 55128, Mainz, Germany
| | - Olena V Moshynets
- Biofilm study group, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St, 03143, Kyiv, Ukraine
| | - Sergiy S Lukashov
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St, 03143, Kyiv, Ukraine
| | - Sergiy A Starosyla
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St, 03143, Kyiv, Ukraine.,RECEPTOR.AI, Boston, MA, USA
| | - Hanna V Vyshniakova
- L.V. Gromashevsky Institute of Epidemiology and Infectious Diseases NAMS of Ukraine, 5 Amosova St, 03038, Kyiv, Ukraine
| | - Olga S Iungin
- Department of Functional Genomics, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St, 03143, Kyiv, Ukraine
| | - Volodymyr G Bdzhola
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St, 03143, Kyiv, Ukraine
| | - Andrii O Prykhod'ko
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St, 03143, Kyiv, Ukraine.,Research and Development Department, Scientific Services Company Otava Ltd, 150 Zabolotnogo St, 03143, Kyiv, Ukraine
| | - Anatolii R Syniugin
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St, 03143, Kyiv, Ukraine
| | - Vladislav M Sapelkin
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St, 03143, Kyiv, Ukraine
| | - Sergiy M Yarmoluk
- Department of Medicinal Chemistry, Institute of Molecular Biology and Genetics, the NAS of Ukraine, 150 Zabolotnogo St, 03143, Kyiv, Ukraine
| | - Tanja Schirmeister
- Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg-University of Mainz, Staudinger Weg 5, 55128, Mainz, Germany
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27
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Fungwithaya P, Boonchuay K, Narinthorn R, Sontigun N, Sansamur C, Petcharat Y, Thomrongsuwannakij T, Wongtawan T. First study on diversity and antimicrobial-resistant profile of staphylococci in sports animals of Southern Thailand. Vet World 2022; 15:765-774. [PMID: 35497942 PMCID: PMC9047138 DOI: 10.14202/vetworld.2022.765-774] [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: 11/10/2021] [Accepted: 02/15/2022] [Indexed: 11/19/2022] Open
Abstract
Background and Aim: Staphylococci are commensal bacteria and opportunistic pathogens found on the skin and mucosa. Sports animals are more prone to injury and illness, and we believe that antimicrobial agents might be extensively used for the treatment and cause the existence of antimicrobial-resistant (AMR) bacteria. This study aimed to investigate the diversity and AMR profile of staphylococci in sports animals (riding horses, fighting bulls, and fighting cocks) in South Thailand. Materials and Methods: Nasal (57 fighting bulls and 33 riding horses) and skin swabs (32 fighting cocks) were taken from 122 animals. Staphylococci were cultured in Mannitol Salt Agar and then identified species by biochemical tests using the VITEK® 2 card for Gram-positive organisms in conjunction with the VITEK® 2 COMPACT machine and genotypic identification by polymerase chain reaction (PCR). Antimicrobial susceptibility tests were performed with VITEK® 2 AST-GN80 test kit cards and VITEK® 2 COMPACT machine. Detection of AMR genes (mecA, mecC, and blaZ) and staphylococcal chromosomal mec (SCCmec) type was evaluated by PCR. Results: Forty-one colonies of staphylococci were isolated, and six species were identified, including Staphylococcus sciuri (61%), Staphylococcus pasteuri (15%), Staphylococcus cohnii (10%), Staphylococcus aureus (7%), Staphylococcus warneri (5%), and Staphylococcus haemolyticus (2%). Staphylococci were highly resistant to two drug classes, penicillin (93%) and cephalosporin (51%). About 56% of the isolates were methicillin-resistant staphylococci (MRS), and the majority was S. sciuri (82%), which is primarily found in horses. Most MRS (82%) were multidrug-resistant. Almost all (96%) of the mecA-positive MRS harbored the blaZ gene. Almost all MRS isolates possessed an unknown type of SCCmec. Interestingly, the AMR rate was notably lower in fighting bulls and cocks than in riding horses, which may be related to the owner’s preference for herbal therapy over antimicrobial drugs. Conclusion: This study presented many types of staphylococci displayed on bulls, cocks, and horses. However, we found a high prevalence of MRS in horses that could be transmitted to owners through close contact activities and might be a source of AMR genotype transmission to other staphylococci.
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Affiliation(s)
- Punpichaya Fungwithaya
- Akkraratchkumari Veterinary College, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160; Centre for One Health, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160; Excellence Centre for Melioidosis and Other Microorganisms, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160
| | - Kanpapat Boonchuay
- Akkraratchkumari Veterinary College, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160
| | - Ruethai Narinthorn
- Akkraratchkumari Veterinary College, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160
| | - Narin Sontigun
- Akkraratchkumari Veterinary College, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160; Centre for One Health, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160; Excellence Centre for Melioidosis and Other Microorganisms, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160
| | - Chalutwan Sansamur
- Akkraratchkumari Veterinary College, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160; Centre for One Health, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160
| | - Yotsapat Petcharat
- Akkraratchkumari Veterinary College, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160
| | - Thotsapol Thomrongsuwannakij
- Akkraratchkumari Veterinary College, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160; Centre for One Health, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160
| | - Tuempong Wongtawan
- Akkraratchkumari Veterinary College, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160; Centre for One Health, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160; Excellence Centre for Melioidosis and Other Microorganisms, Walailak University, Thai Buri, Tha Sala, Nakhon Si Thammarat, Thailand 80160
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28
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Murad AM, Brognaro H, Falke S, Lindner J, Perbandt M, Mudogo C, Schubert R, Wrenger C, Betzel C. Structure and activity of the DHNA Coenzyme-A Thioesterase from Staphylococcus aureus providing insights for innovative drug development. Sci Rep 2022; 12:4313. [PMID: 35279696 PMCID: PMC8918352 DOI: 10.1038/s41598-022-08281-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 03/01/2022] [Indexed: 12/04/2022] Open
Abstract
Humanity is facing an increasing health threat caused by a variety of multidrug resistant bacteria. Within this scenario, Staphylococcus aureus, in particular methicillin resistant S. aureus (MRSA), is responsible for a number of hospital-acquired bacterial infections. The emergence of microbial antibiotic resistance urgently requires the identification of new and innovative strategies to treat antibiotic resistant microorganisms. In this context, structure and function analysis of potential drug targets in metabolic pathways vital for bacteria endurance, such as the vitamin K2 synthesis pathway, becomes interesting. We have solved and refined the crystal structure of the S. aureus DHNA thioesterase (SaDHNA), a key enzyme in the vitamin K2 pathway. The crystallographic structure in combination with small angle X-ray solution scattering data revealed a functional tetramer of SaDHNA. Complementary activity assays of SaDHNA indicated a preference for hydrolysing long acyl chains. Site-directed mutagenesis of SaDHNA confirmed the functional importance of Asp16 and Glu31 for thioesterase activity and substrate binding at the putative active site, respectively. Docking studies were performed and rational designed peptides were synthesized and tested for SaDHNA inhibition activity. The high-resolution structure of SaDHNA and complementary information about substrate binding will support future drug discovery and design investigations to inhibit the vitamin K2 synthesis pathway.
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29
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Gu Y, Zheng R, Sun C, Wu S. Isolation, Identification and Characterization of Two Kinds of Deep-Sea Bacterial Lipopeptides Against Foodborne Pathogens. Front Microbiol 2022; 13:792755. [PMID: 35185844 PMCID: PMC8851162 DOI: 10.3389/fmicb.2022.792755] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 01/13/2022] [Indexed: 11/28/2022] Open
Abstract
Under multiple stresses of deep sea, many microorganisms have evolved potentials to produce different metabolites to cope with the stresses they face. In this study, we isolated a bacterial strain Bacillus sp. YJ17 from the deep-sea cold seep. Compared with commercial food preservative nisin, it showed broad and strong antibacterial activities against foodborne pathogens, including multiple resistant bacteria Pseudomonas aeruginosa PAO1 and methicillin-resistant Staphylococcus aureus (MRSA). The active agents were purified by reversed-phase high performance liquid chromatography (RP-HPLC). Analysis of high-energy collision induced dissociation mass spectrometry (HCD-MS) showed that the two active agents belong to family of fengycin and surfactin, and based on results of tandem mass spectrometry (HCD-MS/MS), the amino acid sequence of purified fengycin and surfactin might be Glu-Orn-Tyr-Thr-Glu-Val-Pro-Gln-Tyr-Ile and Glu-Leu/Ile-Leu/Ile-Leu/Ile-Val-Asp-Leu/Ile, respectively. Since the purified fengycin and surfactin exhibited strong inhibition against P. aeruginosa PAO1 and MRSA respectively, the inhibition mechanisms of fengycin against P. aeruginosa PAO1 and surfactin against MRSA were investigated by electron microscopy. After treatment with purified fengycin, the morphology of P. aeruginosa PAO1 became abnormal and aggregated together, and obvious cytoplasmic leakage was observed. After treatment with purified surfactin, the MRSA cells clustered together, and cell surface became rough and jagged. Further study showed that reactive oxygen species (ROS) accumulation and cell membrane damage occurred in P. aeruginosa PAO1 and MRSA after treated with fengycin and surfactin, respectively. Furthermore, typical ROS scavenging enzymes catalase (CAT) and superoxide dismutase (SOD) were also significantly reduced in P. aeruginosa PAO1 and MRSA after treated with fengycin and surfactin, respectively. Therefore, the inhibition mechanisms of fengycin against P. aeruginosa PAO1 and surfactin against MRSA are closely related with accumulation of ROS, which might be due to the decreased activity of CAT and SOD after treated with fengycin and surfactin, respectively. Overall, our study provides good candidates from the deep-sea environment to deal with foodborne pathogens, especially multidrug-resistant bacteria.
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Affiliation(s)
- Yanjun Gu
- College of Life Sciences, Qingdao University, Qingdao, China
| | - Rikuan Zheng
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- Center of Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| | - Chaomin Sun
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- Center of Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| | - Shimei Wu
- College of Life Sciences, Qingdao University, Qingdao, China
- *Correspondence: Shimei Wu,
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30
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Shahbandeh M, Moosazadeh Moghaddam M, Golmohammadi R, Mirnejad R. The antimicrobial effect of quorum sensing autoinducers of Pseudomonas aeruginosa, C12-HSL and C4-HSL, against MDR Staphylococcus aureus isolates. Comp Immunol Microbiol Infect Dis 2022; 81:101747. [PMID: 35030534 DOI: 10.1016/j.cimid.2022.101747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 12/26/2021] [Accepted: 01/05/2022] [Indexed: 12/01/2022]
Abstract
In the current study, we investigated the antibacterial activity of main quorum sensing autoinducers of Pseudomonas aeruginosa, C12-HSL and C4-HSL, against MDR Staphylococcus aureus isolates and their synergistic effects with some common antibiotics. Forty clinical isolates of S. aureus were collected and their antibiotic susceptibility pattern was evaluated. Then, 10 resistant isolates were selected for further studies. In the following, the antibacterial activity of quorum sensing C12-HSL and C4-HSL inducers of P. aeruginosa was evaluated against selected isolates based on the microdilution method and Time Killing assay as well as their synergistic activity with selected antibiotics. The ability of inductors to hemolysis and their cytotoxicity on CHO and HeLa cell lines was also assessed. For the assessment of antibacterial activity, Acinetobacter baumannii was used as negative control. The results demonstrated that C12 and C4 have antibacterial activity against MDR S. aureus isolates but had no effect on A. baumannii. Time Killing test showed that at 2X MIC concentration, the maximum inhibition (100%) is observed after 120 min for C12 and 240 min for C4. The IC50 of inducers was about 512 μg/ml. In addition, no synergistic effects were observed.
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Affiliation(s)
- Mahsa Shahbandeh
- Young Researchers and Elite Club, Saveh Branch, Islamic Azad University, Saveh, Iran
| | | | - Reza Golmohammadi
- Baqiyatallah Research Center for Gastroenterology and Liver Diseases (BRCGL), Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Reza Mirnejad
- Molecular Biology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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31
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Mataracı-Kara E, Bayrak N, Yıldız M, Yıldırım H, TuYuN AF. Active Quinolinequinones against Methicillin-Resistant Staphylococcus spp. Chem Biodivers 2021; 19:e202100616. [PMID: 34812587 DOI: 10.1002/cbdv.202100616] [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: 08/03/2021] [Accepted: 11/22/2021] [Indexed: 12/24/2022]
Abstract
Serious bacterial infections could be caused by Gram-positive microorganisms, in particular methicillin-resistant Staphylococcus aureus and Staphylococcus epidermidis. Aiming to address this challenging issue by developing the potent and selective antimicrobial lead structures against methicillin-resistant Staphylococcus spp., herein, we report in vitro evaluation of quinolinequinones (QQ1-QQ10) against the Gram-negative and Gram-positive strains using the broth microdilution technique. The design principle of the quinolinequinones was based on the variation of the structures attached to the 1,4-quinone moiety and substituent(s) within amino phenyl moiety. A series of ten quinolinequinones displayed activity mainly against the Gram-positive strains with a minimal inhibitory concentration (MIC=1.22-1250 mg/L) within the Clinical and Laboratory Standards Institute (CLSI) levels. Interestingly, QQ3, QQ5, and QQ6 displayed equal antibacterial inhibitory activity against S. aureus (MIC=1.22 mg/L), respectively, to the standard positive control Cefuroxime-Na. QQ2, QQ3, and QQ5 had the best inhibitory activity with the MIC value of 1.22 mg/L (4-fold more potent compared reference standard Cefuroxime) against S. epidermidis. On the other hand, QQ3 was the most effective quinolinequinone against fungi, in particular C. albicans. The identified lead quinolinequinones (QQ3 and QQ5) with a comprehensive analysis of structure-activity relationships and further studies showed high activity against methicillin-resistant Staphylococcus spp. It is worth noting that the isopropyl group has importance for excellent bioactivity. Remarkably, the in vitro antibiofilm and bactericidal activities (each of 32 clinically obtained strains of Gram-positive bacteria) of the selected two quinolinequinones (QQ3 and QQ5) have been evaluated for the mode of action in addition to the time-kill curve study.
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Affiliation(s)
- Emel Mataracı-Kara
- Pharmaceutical Microbiology Department, Pharmacy Faculty, Istanbul University, Beyazit, Istanbul, Turkey
| | - Nilüfer Bayrak
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpasa, Avcilar, Istanbul, Turkey
| | - Mahmut Yıldız
- Chemistry Department, Gebze Technical University, Gebze, Kocaeli, Turkey
| | - Hatice Yıldırım
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpasa, Avcilar, Istanbul, Turkey
| | - Amaç Fatih TuYuN
- Department of Chemistry, Faculty of Science, Istanbul University, Fatih, Istanbul, Turkey
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32
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Biofilm Formation and its Association with Antibiotic Susceptibility Pattern in Methicillin-resistant Staphylococcus aureus isolates. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2021. [DOI: 10.22207/jpam.15.4.26] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus is a clinically significant pathogen that causes infections ranging from skin and soft tissue infections to life-threatening sepsis. Biofilm formation by MRSA is one of the crucial virulence factor. Determination of beta-lactamase and biofilm production among Staphylococcus aureus was obtained from various clinical specimens. Standard bacteriological procedures were used for isolation and identification and antibiotic sensitivity was determined using the Kirby Bauer disc diffusion method according to CLSI guidelines. The cloverleaf method, acidometric, iodometric and chromogenic methods were used to detect beta-lactamase while the microtiter plate method and Congo red agar method were used to detect biofilm production. Of the 288 MRSA strains isolated from various clinical specimens,198 (67.07%) were biofilm producers. Cloverleaf and chromogenic (nitrocefin) disc shows 100% results for beta-lactamase detection. Vancomycin was 100% sensitive followed by teicoplanin (92.36%) and linezolid (89.93%). Cloverleaf and nitrocefin disc methods were the most sensitive for detection of beta-lactamase in S. aureus and there was no significant relation between biofilm production and antibiotic sensitivity pattern of S. aureus.
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33
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Girijan SK, Pillai D. Identification and characterization of vancomycin-resistant Staphylococcus aureus in hospital wastewaters: evidence of horizontal spread of antimicrobial resistance. JOURNAL OF WATER AND HEALTH 2021; 19:785-795. [PMID: 34665771 DOI: 10.2166/wh.2021.117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Antibiotic resistance has become a major threat to human health around the world, but its spread through the aquatic environment has been often overlooked. This study aimed to determine the occurrence of vancomycin-resistant Staphylococcus aureus in hospital wastewaters and their transmission into public water bodies in Kerala, India. A total of 113 S. aureus were isolated from three hospital effluents in Kerala, India. Standard disc diffusion and the strip method were used for antibiotic susceptibility testing and minimum inhibitory concentration detection. Plasmid-mediated vancomycin resistance was confirmed by plasmid curing and conjugation; resistant genes were detected by the polymerase chain reaction (PCR). Nearly 76% of S. aureus isolates were resistant to β-lactams, chloramphenicol, macrolides, aminoglycosides, and glycopeptide class of antibiotics. Among the vancomycin-resistant Staphylococcus aureus (VRSA) isolates, the prevalence rates of vanA and vanB resistance-encoding genes were 46.5 and 59.3%, respectively. Through the broth mating method, vanA gene was successfully transferred from VRSA donor to vancomycin-sensitive S. aureus. The study strongly indicates the contamination of water bodies with antibiotic-resistant bacteria from hospital discharges, their dissemination and possible transfer to microbes in the aquatic environment, posing a serious threat for public health.
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Affiliation(s)
- Sneha Kalasseril Girijan
- Department of Aquatic Animal Health Management, Kerala University of Fisheries and Ocean Studies, Kerala, India E-mail:
| | - Devika Pillai
- Department of Aquatic Animal Health Management, Kerala University of Fisheries and Ocean Studies, Kerala, India E-mail:
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34
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Rybak M, Gudzera OI, Gorbatiuk OB, Usenko MO, Yarmoluk SM, Tukalo MA, Volynets GP. Rational Design of Hit Compounds Targeting Staphylococcus aureus Threonyl-tRNA Synthetase. ACS OMEGA 2021; 6:24910-24918. [PMID: 34604672 PMCID: PMC8482496 DOI: 10.1021/acsomega.1c03789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Indexed: 06/13/2023]
Abstract
Staphylococcus aureus is one of the most dangerous nosocomial pathogens which cause a wide variety of hospital-acquired infectious diseases. S. aureus is considered as a superbug due to the development of multidrug resistance to all current therapeutic regimens. Therefore, the discovery of antibiotics with novel mechanisms of action to combat staphylococcal infections is of high priority for modern medicinal chemistry. Nowadays, aminoacyl-tRNA synthetases are considered as promising molecular targets for antibiotic development. In the present study, we used for the first time S. aureus threonyl-tRNA synthetase (ThrRS) as a molecular target. Recombinant S. aureus ThrRS was obtained in the soluble form in a sufficient amount for inhibitor screening assay. Using the molecular docking approach, we selected 180 compounds for investigation of inhibitory activity toward ThrRS. Among the tested compounds, we identified five inhibitors from different chemical classes decreasing the activity of ThrRS by more than 70% at a concentration of 100 μM. The most active compound 2,4-dibromo-6-{[4-(4-nitro-phenyl)-thiazol-2-yl]-hydrazonomethyl}-phenol has an IC50 value of 56.5 ± 3.5 μM. These compounds are not cytotoxic toward eukaryotic cells HEK293 (EC50 > 100 μM) and can be useful for further optimization and biological research.
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Affiliation(s)
- Mariia
Yu. Rybak
- Department
of Protein Synthesis Enzymology, Institute
of Molecular Biology and Genetics National Academy of Sciences of
Ukraine, 150 Zabolotnogo Street, Kyiv 03143, Ukraine
| | - Olga I. Gudzera
- Department
of Protein Synthesis Enzymology, Institute
of Molecular Biology and Genetics National Academy of Sciences of
Ukraine, 150 Zabolotnogo Street, Kyiv 03143, Ukraine
| | - Oksana B. Gorbatiuk
- Department
of Cell Regulatory Mechanisms, Institute
of Molecular Biology and Genetics National Academy of Sciences of
Ukraine, 150 Zabolotnogo Street, Kyiv 03143, Ukraine
| | - Mariia O. Usenko
- Department
of Cell Regulatory Mechanisms, Institute
of Molecular Biology and Genetics National Academy of Sciences of
Ukraine, 150 Zabolotnogo Street, Kyiv 03143, Ukraine
| | - Sergiy M. Yarmoluk
- Department
of Medicinal Chemistry, Institute of Molecular
Biology and Genetics National Academy of Sciences of Ukraine, 150 Zabolotnogo Street, Kyiv 03143, Ukraine
| | - Michael A. Tukalo
- Department
of Protein Synthesis Enzymology, Institute
of Molecular Biology and Genetics National Academy of Sciences of
Ukraine, 150 Zabolotnogo Street, Kyiv 03143, Ukraine
| | - Galyna P. Volynets
- Department
of Medicinal Chemistry, Institute of Molecular
Biology and Genetics National Academy of Sciences of Ukraine, 150 Zabolotnogo Street, Kyiv 03143, Ukraine
- The
Scientific-Services Company “OTAVA”, 150 Zabolotnogo Street, Kyiv 03143, Ukraine
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35
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Jeong ET, Park SK, Jo DM, Khan F, Choi TH, Yoon TM, Kim YM. Synergistic Antibacterial Activity of an Active Compound Derived from Sedum takesimense against Methicillin-Resistant Staphylococcus aureus and Its Clinical Isolates. J Microbiol Biotechnol 2021; 31:1288-1294. [PMID: 34319257 PMCID: PMC9705924 DOI: 10.4014/jmb.2105.05015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/17/2021] [Accepted: 07/19/2021] [Indexed: 12/15/2022]
Abstract
There are a growing number of reports of hospital-acquired infections caused by pathogenic bacteria, especially methicillin-resistant Staphylococcus aureus (MRSA). Many plant products are now being used as a natural means of exploring antimicrobial agents against different types of human pathogenic bacteria. In this research, we sought to isolate and identify an active molecule from Sedum takesimense that has possible antibacterial activity against various clinical isolates of MRSA. NMR analysis revealed that the structure of the HPLC-purified compound was 1,2,4,6-tetra-O-galloyl-glucose. The minimum inhibitory concentration (MIC) of different extract fractions against numerous pathogenic bacteria was determined, and the actively purified compound has potent antibacterial activity against multidrug-resistant pathogenic bacteria, i.e., MRSA and its clinical isolates. In addition, the combination of the active compound and β-lactam antibiotics (e.g., oxacillin) demonstrated synergistic action against MRSA, with a fractional inhibitory concentration (FIC) index of 0.281. The current research revealed an alternative approach to combating pathogenesis caused by multi-drug resistant bacteria using plant materials. Furthermore, using a combination approach in which the active plant-derived compound is combined with antibiotics has proved to be a successful way of destroying pathogens synergistically.
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Affiliation(s)
- Eun-Tak Jeong
- DYNE SOZE Co., Ltd., U-TOWER, Yongin 16827, Republic of Korea,Department of Food Science and Technology, Pukyong National University, Busan 48513, Republic of Korea
| | - Seul-Ki Park
- Institute of Food Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Du-Min Jo
- Department of Food Science and Technology, Pukyong National University, Busan 48513, Republic of Korea
| | - Fazlurrahman Khan
- Research Center for Marine Integrated Bionics Technology, Pukyong National University, Busan 48513, Republic of Korea
| | - Tae Ho Choi
- DYNE SOZE Co., Ltd., U-TOWER, Yongin 16827, Republic of Korea
| | - Tae-Mi Yoon
- DYNE SOZE Co., Ltd., U-TOWER, Yongin 16827, Republic of Korea
| | - Young-Mog Kim
- Department of Food Science and Technology, Pukyong National University, Busan 48513, Republic of Korea,Corresponding author Phone: +82-51-629-5832 Fax: +82-51-629-5824 E-mail:
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36
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Bishr AS, Abdelaziz SM, Yahia IS, Yassien MA, Hassouna NA, Aboshanab KM. Association of Macrolide Resistance Genotypes and Synergistic Antibiotic Combinations for Combating Macrolide-Resistant MRSA Recovered from Hospitalized Patients. BIOLOGY 2021; 10:biology10070624. [PMID: 34356479 PMCID: PMC8301042 DOI: 10.3390/biology10070624] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 06/22/2021] [Indexed: 12/18/2022]
Abstract
Simple Summary Macrolide-resistant methicillin-resistant Staphylococcus aureus (MAC-MRSA) is one of the most clinically relevant pathogens due to its significant ability of resistance acquisition to different antimicrobial agents and narrow therapeutic options. This study aimed to evaluate antimicrobial susceptibility and the use of different combinations of azithromycin with other antibiotics as well as studying the correlation of MAC resistance genotypes and antimicrobial agents that provided synergy when they were combined with azithromycin. Azithromycin (AZM) combinations with either linezolid, ceftriaxone, gentamicin, or cefotaxime provided synergy in 42.1%, 44.7%, 31.6% and 7.9% of the 38 MAC-MRSA isolates, respectively. Statistical analysis showed significant association between the presence of the ermA genotype and the synergism of AZM + ceftriaxone and AZM + gentamicin; the presence of the ermC genotype and the synergism between AZM and gentamicin; the presence of the msrA genotype and the synergism between AZM and ceftriaxone; and the presence of the ermA/msrA genotype and the synergism between AZM and cefotaxime. The obtained findings will guide clinicians in better choosing the antibiotic combinations required for combating MAC-MRSA clinical isolates. However, the promising synergistic antibiotic combinations must be re-evaluated in vivo using an appropriate animal model. Abstract Macrolide-resistant methicillin-resistant Staphylococcus aureus (MAC-MRSA) is one of the most clinically relevant pathogens due to its significant ability of resistance acquisition to different antimicrobial agents. This study aimed to evaluate antimicrobial susceptibility and the use of different combinations of azithromycin with other antibiotics for combating MAC resistance. Seventy-two Staphylococci (38.5%) (n = 187), showed resistance to MACs; of these, 53 isolates (73.6%, n = 72) were S. aureus and 19 (26.4%, n = 72) were coagulase-negative staphylococci (CoNS). Out of the 53 S. aureus and 19 CoNS isolates, 38 (71.7%, n = 53) and 9 (47.4%, n = 19) were MRSA and methicillin-resistant CoNS, respectively. The constitutive MACs, lincosamides and streptogramin-B (cMLS) comprised the predominant phenotype among S. aureus isolates (54.7%) and CoNS isolates (78.9%). The PCR analysis showed that the ermC gene was the most prevalent (79.2%), followed by msrA (48.6%), and ermA (31.9%). Azithromycin combinations with either linezolid, ceftriaxone, gentamicin, or cefotaxime provided synergy in 42.1%, 44.7%, 31.6% and 7.9% of the 38 MAC-MRSA isolates, respectively. Statistical analysis showed significant association between certain MAC resistance genotypes and the synergistic effect of certain azithromycin combinations (p value < 0.05). In conclusion, azithromycin combinations with either linezolid, or ceftriaxone showed synergism in most of the MAC-resistant MRSA clinical isolates.
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Affiliation(s)
- Amr S. Bishr
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St., Cairo 11566, Egypt; (A.S.B.); (S.M.A.); (M.A.Y.); (N.A.H.)
| | - Salma M. Abdelaziz
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St., Cairo 11566, Egypt; (A.S.B.); (S.M.A.); (M.A.Y.); (N.A.H.)
| | - Ibrahim S. Yahia
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha P.O. Box 9004, Saudi Arabia;
- Advanced Functional Materials & Optoelectronic Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, Abha P.O. Box 9004, Saudi Arabia
- Nanoscience Laboratory for Environmental and Bio-Medical Applications (NLEBA), Semiconductor Lab., Physics Department, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt
| | - Mahmoud A. Yassien
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St., Cairo 11566, Egypt; (A.S.B.); (S.M.A.); (M.A.Y.); (N.A.H.)
| | - Nadia A. Hassouna
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St., Cairo 11566, Egypt; (A.S.B.); (S.M.A.); (M.A.Y.); (N.A.H.)
| | - Khaled M. Aboshanab
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St., Cairo 11566, Egypt; (A.S.B.); (S.M.A.); (M.A.Y.); (N.A.H.)
- Correspondence: ; Tel.: +20-224-829-040
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37
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Vallejo W, Navarro K, Díaz-Uribe C, Schott E, Zarate X, Romero E. Zn(II)-tetracarboxy-phthalocyanine-Sensitized TiO 2 Thin Films as Antimicrobial Agents under Visible Irradiation: a Combined DFT and Experimental Study. ACS OMEGA 2021; 6:13637-13646. [PMID: 34095657 PMCID: PMC8173549 DOI: 10.1021/acsomega.1c00658] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 05/10/2021] [Indexed: 06/02/2023]
Abstract
In this article, we studied the antimicrobial activity of TiO2 sensitized by the Zn(II)-tetracarboxy-phthalocyanine (TcPcZn) complex using TiO2-Degussa P25 as a semiconductor source. The TiO2 thin films were deposited by the doctor blade method and were sensitized by the chemisorption process. The obtained compounds were characterized using Fourier transform infrared spectroscopy, UV-vis spectrophotometry, Raman spectroscopy, diffuse reflectance spectroscopy, and scanning electron microscopy. Furthermore, we studied the stability of the adsorbed sensitizer on the semiconductor surface by using the density functional theory (DFT). Additionally, we determined the antimicrobial activity of TcPcZn-TiO2 against methicillin-resistant Staphylococcus aureus (MRSA). The Raman and optical results confirmed the sensitizing process. The TcPcZn-TiO2 thin films showed radiation absorption in the visible range of the electromagnetic spectrum (600-750 nm), and the dye anchored on the TiO2 surface had a band gap of 1.58 eV. The DFT study showed that TcPcZn supported on any phase of Degussa P25 is stable, making them suitable to act as catalysts in the proposed reactions. Finally, the TcPcZn-TiO2 thin films reached 76.5% of inhibition activity against MRSA.
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Affiliation(s)
- William Vallejo
- Grupo
de Investigación en Fotoquímica y Fotobiología,
Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico, Puerto Colombia 081007, Colombia
| | - Karen Navarro
- Grupo
de Investigación en Fotoquímica y Fotobiología,
Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico, Puerto Colombia 081007, Colombia
| | - Carlos Díaz-Uribe
- Grupo
de Investigación en Fotoquímica y Fotobiología,
Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico, Puerto Colombia 081007, Colombia
| | - Eduardo Schott
- Departamento
de Química Inorgánica, Facultad de Química y
de Farmacia, Centro de Energía UC, Centro de Investigación
en Nanotecnología y Materiales Avanzados CIEN-UC, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna, 4860 Santiago, Chile
- Millenium
Nuclei on Catalytic Processes Towards Sustainable Chemistry (CSC), Concepcion 4030000, Chile
| | - Ximena Zarate
- Instituto
de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Avenida Pedro de Valdivia 425, Santiago 7500912, Chile
| | - Eduard Romero
- Departamento
de Química, Universidad Nacional
de Colombia, Bogotá 111321, Colombia
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Rahman L, Lembang RS, Lallo S, Handayani SR, Usmanengsi, Permana AD. Bioadhesive dermal patch as promising approach for improved antibacterial activity of bioactive compound of Zingiber cassumunar Roxb in ex vivo Staphylococcus aureus skin infection model. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102522] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Markwart R, Willrich N, Eckmanns T, Werner G, Ayobami O. Low Proportion of Linezolid and Daptomycin Resistance Among Bloodborne Vancomycin-Resistant Enterococcus faecium and Methicillin-Resistant Staphylococcus aureus Infections in Europe. Front Microbiol 2021; 12:664199. [PMID: 34135877 PMCID: PMC8203336 DOI: 10.3389/fmicb.2021.664199] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 05/06/2021] [Indexed: 12/28/2022] Open
Abstract
Vancomycin-resistant Enterococcus faecium (VREF) and methicillin-resistant Staphylococcus aureus (MRSA) are associated with significant health burden. We investigated linezolid and daptomycin resistance among VREF and MRSA in the EU/EEA between 2014 and 2018. Descriptive statistics and multivariable logistic regression were used to analyze 6,949 VREF and 35,131 MRSA blood isolates from patients with bloodstream infection. The population-weighted mean proportion of linezolid resistance in VREF and MRSA between 2014 and 2018 was 1.6% (95% CI 1.33–2.03%) and 0.28% (95% CI 0.32–0.38%), respectively. Daptomycin resistance in MRSA isolates was similarly low [1.1% (95% CI 0.75–1.6%)]. On the European level, there was no temporal change of daptomycin and linezolid resistance in MRSA and VREF. Multivariable regression analyses showed that there was a higher likelihood of linezolid and daptomycin resistance in MRSA (aOR: 2.74, p < 0.001; aOR: 2.25, p < 0.001) and linezolid in VREF (aOR: 1.99, p < 0.001) compared to their sensitive isolates. The low proportion of linezolid and daptomycin resistance in VREF and MRSA suggests that these last-resort antibiotics remain effective and will continue to play an important role in the clinical management of these infections in Europe. However, regional and national efforts to contain antimicrobial resistance should continue to monitor the trend through strengthened surveillance that includes genomic surveillance for early warning and action.
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Affiliation(s)
- Robby Markwart
- Jena University Hospital, Institute of General Practice and Family Medicine, Jena, Germany
| | - Niklas Willrich
- Unit 37: Nosocomial Infections, Surveillance of Antimicrobial Resistance and Consumption, Robert Koch Institute, Berlin, Germany
| | - Tim Eckmanns
- Unit 37: Nosocomial Infections, Surveillance of Antimicrobial Resistance and Consumption, Robert Koch Institute, Berlin, Germany
| | - Guido Werner
- Division Nosocomial Pathogens and Antibiotic Resistances, Department of Infectious Diseases, National Reference Centre for Staphylococci and Enterococci, Robert Koch Institute, Wernigerode, Germany
| | - Olaniyi Ayobami
- Unit 37: Nosocomial Infections, Surveillance of Antimicrobial Resistance and Consumption, Robert Koch Institute, Berlin, Germany
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The Link between Occurrence of Class I Integron and Acquired Aminoglycoside Resistance in Clinical MRSA Isolates. Antibiotics (Basel) 2021; 10:antibiotics10050488. [PMID: 33922421 PMCID: PMC8147066 DOI: 10.3390/antibiotics10050488] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 04/18/2021] [Accepted: 04/21/2021] [Indexed: 11/20/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a major cause of nosocomial infections because of its high resistance. Here, we study the antibiotic resistance in MRSA clinical isolates and their relation to integron I occurrence. A total of 88 clinical Staphylococcusaureus isolates were collected. MRSA were identified by the disk diffusion method (DDM) and confirmed by PCR, and antibiogram was determined by DDM. Integron I, II and the aacA4 gene were investigated by PCR. Integrase-positive strains were analyzed for the presence of resistance gene cassettes by sequencing. All isolates were identified as MRSA by DDM and confirmed by PCR. All isolates were resistant to ampicillin and cefoxitin. Concerning aminoglycosides, the frequency of resistance was reported for streptomycin (60.7%), tobramycin (37.1%) gentamicin (36%), and for amikacin (15.9%). Integron I was detected in 41 isolates (46.6%), while integron II was detected in three isolates (3.4%). Sequencing of the integron I-cassette indicated the exclusive prevalence of addA gene variants mediating aminoglycoside resistance. The aacA4 gene was found in DNA of 31 isolates (35.22%). This study revealed the high existence of MRSA. Furthermore, the AacA4 gene and class I integron harboring aadA gene were predominant in MRSA isolates.
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Silva V, Caniça M, Capelo JL, Igrejas G, Poeta P. Diversity and genetic lineages of environmental staphylococci: a surface water overview. FEMS Microbiol Ecol 2021; 96:5909032. [PMID: 32949464 DOI: 10.1093/femsec/fiaa191] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 09/17/2020] [Indexed: 12/11/2022] Open
Abstract
Antimicrobial resistance in the environmental dimension is one of the greatest challenges and emerging threats. The presence of resistant bacteria and resistance genes in the environment, especially in aquatic systems, has been a matter of growing concern in the past decade. Monitoring the presence of antimicrobial resistance species, in this particular case, Staphylococcus spp., in natural water environments could lead to a better understanding of the epidemiology of staphylococci infections. Thus, the investigation of natural waters as a potential reservoir and vehicle for transmission of these bacteria is imperative. Only a few studies have investigated the prevalence, antimicrobial resistance and genetic lineages of staphylococci in natural waters. Those studies reported a high diversity of staphylococci species and lineages in surface waters. Methicillin-resistant S. aureus were relatively prevalent in surface waters and, as expected, often presented a multidrug-resistant profile. There was a high diversity of S. aureus lineages in surface waters. The presence of S. aureus CC8 and CC5 suggests a human origin. Among the coagulase-negative staphylococci, the most frequently found in natural waters was S. warneri and S. epidermidis. These studies are extremely important to estimate the contribution of the aquatic environment in the spread of pathogenic bacteria.
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Affiliation(s)
- Vanessa Silva
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5001-801 Vila Real, Portugal
- Department of Genetics and Biotechnology, Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal
- Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro (UTAD), 5001-801 Vila Real, Portugal
- Associated Laboratory for Green Chemistry (LAQV-REQUIMTE), NOVA University of Lisbon, Lisboa, 2829-516 Caparica, Portugal
| | - Manuela Caniça
- National Reference Laboratory of Antibiotic Resistances and Healthcare Associated Infections (NRL-AMR/HAI), Department of Infectious Diseases, National Institute of Health Dr Ricardo Jorge, Av. Padre Cruz, 1649-016 Lisbon, Portugal
- Centre for the Studies of Animal Science, Institute of Agrarian and Agri-Food Sciences and Technologies, Oporto University, 4051-401 Oporto, Portugal
| | - José L Capelo
- BIOSCOPE Group, LAQV-REQUIMTE, Department of Chemistry, Faculty of Science and Technology, NOVA University of Lisbon, 2825-466 Almada, Portugal
- Proteomass Scientific Society, 2825-466 Costa de Caparica, Portugal
| | - Gilberto Igrejas
- Department of Genetics and Biotechnology, Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro, 5001-801 Vila Real, Portugal
- Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro (UTAD), 5001-801 Vila Real, Portugal
- Associated Laboratory for Green Chemistry (LAQV-REQUIMTE), NOVA University of Lisbon, Lisboa, 2829-516 Caparica, Portugal
| | - Patrícia Poeta
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5001-801 Vila Real, Portugal
- Associated Laboratory for Green Chemistry (LAQV-REQUIMTE), NOVA University of Lisbon, Lisboa, 2829-516 Caparica, Portugal
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Li C, Bao W, Zhang H, Lyu Z, Chen Y, Guo Z. Discovery of Brominated Alboflavusins With Anti-MRSA Activities. Front Microbiol 2021; 12:641025. [PMID: 33664724 PMCID: PMC7920986 DOI: 10.3389/fmicb.2021.641025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Accepted: 01/27/2021] [Indexed: 11/17/2022] Open
Abstract
As methicillin-resistant Staphylococcus aureus (MRSA) is becoming a serious pathogenic threaten to human health worldwide, there is an urgent need to discover new antibiotics for the treatment of MRSA infections. Alboflavusins (AFNs) are a group of halogenated cyclohexapeptides with anti-MRSA activities. In this study, two novel brominated AFN congeners (compounds 1 and 2) were isolated from the wild-type strain Streptomyces alboflavus sp. 313 that was fermented in the production medium supplemented with NaBr; two new (compounds 3 and 5) and a known (compound 4) dehelogenated AFN congeners were isolated from S. alboflavus ΔafnX, in which the tryptophan halogenase gene afnX was inactivated. The structures of these compounds were assigned by careful NMR and MS analyses. The anti-MRSA activities of varied AFN congeners were assessed against different MRSA strains, which revealed that compounds 1 and 2 with bromine displayed effective activities against the tested MRSA strains. Especially, compound 2 showed good anti-MRSA activity, while compounds 3, 4, and 5 without halogen exhibited weak anti-MRSA activities, outlining the influence of halogen substitution to the bioactivities of AFNs.
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Affiliation(s)
- Chao Li
- State Key Laboratory of Microbial Resources, CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Wuyundalai Bao
- College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, China
| | - Haoyue Zhang
- Key Laboratory of Microbial Diversity Research and Application of Hebei Province, Institute of Life Science and Green Development, College of Life Sciences, Hebei University, Baoding, China
| | - Zhitang Lyu
- Key Laboratory of Microbial Diversity Research and Application of Hebei Province, Institute of Life Science and Green Development, College of Life Sciences, Hebei University, Baoding, China
| | - Yihua Chen
- State Key Laboratory of Microbial Resources, CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Zhengyan Guo
- State Key Laboratory of Microbial Resources, CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
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Khanal A, G.C. S, Gaire A, Khanal A, Estrada R, Ghimire R, Panthee S. Methicillin-resistant Staphylococcus aureus in Nepal: A systematic review and meta-analysis. Int J Infect Dis 2021; 103:48-55. [DOI: 10.1016/j.ijid.2020.11.152] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/10/2020] [Accepted: 11/11/2020] [Indexed: 12/16/2022] Open
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Lai CS, Ponnusamy Y, Lim GL, Ramanathan S. Antibacterial, antibiofilm and antibiotic-potentiating effects of a polyphenol-rich fraction of Dicranopteris linearis (Burm.f.) Underw. J Herb Med 2021. [DOI: 10.1016/j.hermed.2020.100419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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45
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Krátký M, Konečná K, Brokešová K, Maixnerová J, Trejtnar F, Vinšová J. Optimizing the structure of (salicylideneamino)benzoic acids: Towards selective antifungal and anti-staphylococcal agents. Eur J Pharm Sci 2021; 159:105732. [PMID: 33493669 DOI: 10.1016/j.ejps.2021.105732] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 01/04/2021] [Accepted: 01/18/2021] [Indexed: 01/08/2023]
Abstract
An increasing resistance of human pathogenic bacteria and fungi has become a global health problem. Based on previous reports of 4-(salicylideneamino)benzoic acids, we designed, synthesised and evaluated their me-too analogues as potential antimicrobial agents. Forty imines derived from substituted salicylaldehydes and aminobenzoic acids, 4-aminobenzoic acid esters and 4-amino-N-phenylbenzamide were designed using molecular hybridization and prodrug strategies. The target compounds were synthesized with high yields and characterized by spectral methods. They were investigated against a panel of Gram-positive and Gram-negative bacteria, mycobacteria, yeasts and moulds. The most active imines were tested to determine their cytotoxicity and selectivity in HepG2 cells. Dihalogenosalicylaldehydes-based derivatives showed potent broad-spectrum antimicrobial properties, particularly against Gram-positive bacteria including methicillin-resistant Staphylococcus aureus (minimum inhibitory concentrations, MIC, from 7.81 µM) and Enterococcus faecalis (MIC of ≥15.62 µM), yeasts (MIC from 7.81 µM) and Trichophyton interdigitale mould (MIC of ≥3.90 µM). Methyl 4-[(2-hydroxy-3,5-diiodobenzylidene)amino]benzoate 4h exhibited excellent in vitro activity along with low toxicity to mammalian cells. This compound is selective for staphylococci, Candida spp. and Trichophyton interdigitale. In addition, this imine was evaluated as a potential inhibitor of Gram-positive biofilms. The successful approach used provided some promising derivatives with more advantageous properties than the parent 4-(salicylideneamino)benzoic acids.
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Affiliation(s)
- Martin Krátký
- Department of Organic and Bioorganic Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05 Hradec Králové, Czech Republic.
| | - Klára Konečná
- Department of Biological and Medical Sciences, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
| | - Kateřina Brokešová
- Department of Organic and Bioorganic Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
| | - Jana Maixnerová
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - František Trejtnar
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05, Hradec Králové, Czech Republic
| | - Jarmila Vinšová
- Department of Organic and Bioorganic Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Akademika Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
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Zhao Y, Wang Q, Chen Z, Mao D, Luo Y. Significant higher airborne antibiotic resistance genes and the associated inhalation risk in the indoor than the outdoor. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 268:115620. [PMID: 33120141 DOI: 10.1016/j.envpol.2020.115620] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 09/05/2020] [Accepted: 09/06/2020] [Indexed: 06/11/2023]
Abstract
Inhalation of airborne antibiotic resistance genes (ARGs) can lead to antimicrobial resistance and potential health risk. In modern society, increasing individuals stay more indoors, however, studies regarding the exposure to airborne ARGs in indoor environments and the associated risks remain limited. Here, we compared the variance of aerosol-associated ARGs, bacterial microbiomes, and their daily intake (DI) burden in dormitory, office, and outdoor environments in a university in Tianjin. The results indicated that compared to outdoor aerosols, indoors exhibited significantly higher absolute abundance of both ARG subtypes and mobile genetic elements (MGEs) (1-7 orders of magnitude), 16S rRNA genes (2-3 orders), and total culturable bacteria (1-3 orders). Furthermore, we observed that significantly different airborne bacterial communities are the major drivers contributing to the variance of aerosol-associated ARGs in indoor and outdoor aerosols. Notably, the high abundances of total bacteria, potential pathogenic genera, and ARGs (particularly those harbored by pathogens) in indoor and outdoor aerosols, especially in indoors, may pose an increased exposure risk via inhalation. The successful isolation of human pathogens such as Elizabethkingia anopheles, Klebsiella pneumonia, and Delftia lacustris resistant to the "last-resort" antibiotics carbapenems and polymyxin B from indoor aerosols further indicated an increased exposure risk in indoors. Together, this study highlights the potential risks associated with ARGs and their inhalation to human health in indoor environments.
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Affiliation(s)
- Yanhui Zhao
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin, 300071, China
| | - Qing Wang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin, 300071, China; College of Energy and Environmental Engineering, Hebei University of Engineering, Hebei Key Laboratory of Air Pollution Cause and Impact (preparatory), Handan, 056038, China
| | - Zeyou Chen
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin, 300071, China
| | - Daqing Mao
- Medical College, Nankai University, Tianjin, 300071, China
| | - Yi Luo
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin, 300071, China.
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Chaurasia M, Agrawa N, Chourasia A, Bhatnagar M, Parihar G, Rastogi V, Tak A. Isolation, characterisation and antibiotic susceptibility of staphylococcal isolates with special reference to methicillin-resistant Staphylococcus aureus from the anterior nares of healthcare workers in A tertiary healthcare centre. SCRIPTA MEDICA 2021. [DOI: 10.5937/scriptamed52-31190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Background: Staphylococcus aureus (S. aureus) and its resistant form methicillinresistant S. aureus (MRSA) is one of the most common nosocomial pathogens causing a wide range of infections in humans. The anterior nares are the main ecological niche for S. aureus. Nasal carriage of S. aureus acts as an important reservoir of infection among the colonised healthcare workers and they transmit the infection to the community. The aim of the present study was to estimate the nasal colonisation of S. aureus (with special reference to MRSA) in healthcare workers (doctors and nursing staff) and its antibiotic susceptibility pattern. Methods: A descriptive study was planned in the Department of Microbiology, JLN Medical College, Ajmer (Rajasthan, India) after due approval from the institutional ethics committee. A total of 170 healthcare workers of either sex aged between 18 to 60 years were screened for S. aureus. Identification was done using standard microbiological techniques, by studying their morphology, colony and biochemical characteristics. MRSA was detected by cefoxitin disc diffusion test, oxacillin disc diffusion test, minimum inhibitory concentration (MIC) of oxacillin by E-test and oxacillin screen agar test. The observations were described in proportions and Chisquared test was used to find independence. Statistical significance was considered at 5 %. Results: Among 170 samples, 159 (93.53 %) samples (50 doctors and 109 nursing staff) had staphylococci colonisation. Among these 159 isolates, 34 (21.38 %) were S. aureus. Further, 8 (5.03 %) S. aureus isolates were resistant to both cefoxitin and oxacillin and had oxacillin MIC values ≥ 4 µg/mL and were considered MRSA. All the MRSA were detected in the nursing staff (males: 5.50 %, females: 1.83 %). All S. aureus and MRSA isolates were found sensitive to linezolid, vancomycin and mupirocin (minimum inhibitory concentration ≤ 4 µg/mL). Conclusion: Screening and treatment of healthcare workers colonised with MRSA should be an important component of hospital infection control policy. These measures will prevent spread of infection to patients and the community and thereby reduce the morbidity, mortality and healthcare costs associated with nosocomial infections.
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Phan PTT, Nguyen HNT, Kim SN, Pham TAN. Synthesis and anti-methicillin-resistant Staphylococcus aureus activity of 5,7-dibromo-2-benzoylbenzofurans alone and in combination with antibiotics. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1855354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - Hong-Nhung T. Nguyen
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Son N. Kim
- Faculty of Pharmacy, Lac Hong University, Bien Hoa City, Vietnam
| | - Tuan-Anh N. Pham
- Faculty of Pharmacy, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
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Rossato AM, Primon-Barros M, Rocha LDL, Reiter KC, Dias CAG, d’Azevedo PA. Resistance profile to antimicrobials agents in methicillin-resistant Staphylococcus aureus isolated from hospitals in South Brazil between 2014-2019. Rev Soc Bras Med Trop 2020; 53:e20200431. [PMID: 33174961 PMCID: PMC7670760 DOI: 10.1590/0037-8682-0431-2020] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 08/12/2020] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION Methicillin-resistant Staphylococcus aureus (MRSA) is a common pathogen causing healthcare-associated infections. Owing to the restricted use of beta-lactams in MRSA infections, non-beta-lactam antimicrobials are required for treatment. However, MRSA can develop resistance mechanisms to non-beta-lactam antimicrobials, which reduces viable treatment options. Here, we evaluated the antimicrobial susceptibility and resistance genes of MRSA isolated from hospitalized patients in South Brazil. METHODS The antimicrobial susceptibilities of hospital MRSA (217) isolates were determined by disk diffusion or microdilution methods. Additionally, the presence of 14 resistance genes and SCCmec typing was performed by PCR. RESULTS Among the antimicrobials tested, we observed high erythromycin (74.2%), ciprofloxacin (64.5%), and clindamycin (46.1%) resistance rates and complete susceptibility to linezolid and vancomycin. Seventeen different patterns of MRSA antimicrobial resistance were observed, of which 42.9% represented multidrug resistance. Among erythromycin-resistant MRSA, 53.4%, 45.3%, 37.9%, 13.0%, and 6.8% carried ermA, msrA, msrB, ermC, and ermB genes, respectively. Among clindamycin-resistant MRSA, 83%, 17%, 10%, 4%, and 2% carried ermA, ermC, ermB, linA, and linB genes, respectively. Among gentamicin-resistant MRSA, 96.8%, 83.9%, and 9.7% carried aac(6')/aph(2''), aph(3')-IIIa, and ant(4')-Ia genes, respectively. Among tetracycline-resistant MRSA, 6.5% and 93.5% carried tetK and tetM genes, respectively. Lastly, among trimethoprim/sulfamethoxazole-resistant MRSA, 13.3% and 100% carried dfrA and dfrG genes, respectively. The SCCmec type IV isolates were detected more frequently, whereas the SCCmec type III isolates exhibited higher multidrug resistance. CONCLUSIONS The study data provides information regarding the MRSA resistance profile in South Brazil that is associated with the clinical conditions of patients and can contribute to clinical decision-making.
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Affiliation(s)
- Adriana Medianeira Rossato
- Universidade Federal de Ciências da Saúde de Porto Alegre,
Programa de Pós-graduação em Ciências da Saúde, Porto Alegre, RS, Brasil
| | - Muriel Primon-Barros
- Universidade Federal de Ciências da Saúde de Porto Alegre,
Programa de Pós-graduação em Ciências da Saúde, Porto Alegre, RS, Brasil
| | - Lisiane da Luz Rocha
- Universidade Federal de Ciências da Saúde de Porto Alegre,
Programa de Pós-graduação em Ciências da Saúde, Porto Alegre, RS, Brasil
| | - Keli Cristine Reiter
- Universidade Federal de Ciências da Saúde de Porto Alegre,
Programa de Pós-graduação em Ciências da Saúde, Porto Alegre, RS, Brasil
| | - Cícero Armídio Gomes Dias
- Universidade Federal de Ciências da Saúde de Porto Alegre,
Programa de Pós-graduação em Ciências da Saúde, Porto Alegre, RS, Brasil
| | - Pedro Alves d’Azevedo
- Universidade Federal de Ciências da Saúde de Porto Alegre,
Programa de Pós-graduação em Ciências da Saúde, Porto Alegre, RS, Brasil
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Novel Antibiotic Combinations of Diverse Subclasses for Effective Suppression of Extensively Drug-Resistant Methicillin-Resistant Staphylococcus aureus (MRSA). Int J Microbiol 2020; 2020:8831322. [PMID: 33488725 PMCID: PMC7803158 DOI: 10.1155/2020/8831322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 10/05/2020] [Accepted: 10/15/2020] [Indexed: 01/12/2023] Open
Abstract
The emergence of multidrug-resistant pathogens such as methicillin-resistant Staphylococcus aureus (MRSA), the chief etiological agent for a range of refractory infections, has rendered all β-lactams ineffective against it. The treatment process is further complicated with the development of resistance to glycopeptides, primary antibiotics for treatment of MRSA. Antibiotic combination therapy with existing antimicrobial agents may provide an immediate treatment option. Minimum inhibitory concentrations (MICs) of 18 different commercially available antibiotics were determined along with their 90 possible pairwise combinations and 64 triple combinations to filter out 5 best combinations. Time-Kill kinetics of these combinations were then analyzed to find collateral bactericidal combinations which were then tested on other randomly selected MRSA isolates. Among the top 5 combinations including levofloxacin-ceftazidime; amoxicillin/clavulanic acid-tobramycin; amoxicillin/clavulanic acid-cephradine; amoxicillin/clavulanic acid-ofloxacin; and piperacillin/tazobactam-tobramycin, three combinations were found to be collaterally effective. Levofloxacin-ceftazidime acted synergistically in 80% of the tested clinical MRSA isolates. First-line β-lactams of lower generations can be used effectively against MRSA infection when used in combination. Antibiotics other than glycopeptides may still work in combination.
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