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Fassi Fihri R, Ez-Zoubi A, Mbarkiou L, Amar A, Farah A, Bouchamma EO. Antibacterial and antioxidant activities of Chlorella vulgaris and Scenedesmus incrassatulus using natural deep eutectic solvent under microwave assisted by ultrasound. Heliyon 2024; 10:e35071. [PMID: 39161814 PMCID: PMC11332902 DOI: 10.1016/j.heliyon.2024.e35071] [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: 06/30/2024] [Revised: 07/21/2024] [Accepted: 07/22/2024] [Indexed: 08/21/2024] Open
Abstract
Microalgae are increasingly recognized as promising sources of natural bioactive compounds. However, traditional extraction methods using volatile organic solvents (VOCs) pose environmental risks. This study explores renewable deep eutectic solvents (DES) as sustainable alternatives for extracting bioactive compounds from microalgae biomass, focusing on Chlorella vulgaris and Scenedesmus incrassatulus. Four DES systems, comprising choline chloride (ChCl) and glycerol, citric acid, urea, and glucose, were compared with three conventional solvents (ethanol, methanol, and water). Extraction efficiency was assessed based on total phenolic content (TPC), flavonoid content, and tannin content, followed by antioxidant activity evaluation using DPPH, CAT, and FRAP assays. Additionally, antibacterial activity of the DES extracts was determined against Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27853), Staphylococcus aureus (ATCC 29213), and Bacillus subtilis (ATCC 3366) using disc diffusion and microplate dilution methods to determine minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). Results reveal that DES, particularly choline chloride: citric acid, outperform conventional solvents in terms of polyphenol extraction efficiency, antioxidant activity, and antibacterial activity against both Gram-negative and Gram-positive bacteria. For instance, the citric acid-based DES (SIDES2) showed a TPC of 4.98 mg/g, while the conventional solvent ethanol exhibited a TPC of 3.27 mg/g. Additionally, SIDES2 exhibiting the highest DPPH scavenging activity of 75 %, compared to 60 % for ethanol. Furthermore, SIDES2 showed an MIC of 0.5 mg/ml against Staphylococcus aureus. This study underscores the potential of DES for sustainable extraction of natural antioxidants from microalgae biomass, contributing to the development of environmentally friendly extraction processes in various industries.
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Affiliation(s)
- Reda Fassi Fihri
- Functional Ecology and Environment Engineering Laboratory, Faculty of Science and Technology, Sidi Mohamed Ben Abdellah University, Imouzzer street, B.P. 2202, Fez, Morocco
| | - Amine Ez-Zoubi
- Laboratory of Applied Organic Chemistry, Faculty of Sciences and Techniques, Sidi Mohamed Ben Abdellah University, Imouzzer street, B.P. 2202, Fez, Morocco
| | - Latifa Mbarkiou
- Functional Ecology and Environment Engineering Laboratory, Faculty of Science and Technology, Sidi Mohamed Ben Abdellah University, Imouzzer street, B.P. 2202, Fez, Morocco
| | - Aya Amar
- Laboratory of Biotechnology, Environment, Agri-Food and Health, Faculty of Science Dhar Mahraz, Sidi Mohamed Ben Abdellah University, Atlas, B. P. 1796, Fez, Morocco
| | - Abdellah Farah
- Laboratory of Applied Organic Chemistry, Faculty of Sciences and Techniques, Sidi Mohamed Ben Abdellah University, Imouzzer street, B.P. 2202, Fez, Morocco
| | - El Ouazna Bouchamma
- Functional Ecology and Environment Engineering Laboratory, Faculty of Science and Technology, Sidi Mohamed Ben Abdellah University, Imouzzer street, B.P. 2202, Fez, Morocco
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Ounjaijean S, Somsak V, Saki M, Mitsuwan W, Romyasamit C. Antibacterial, Antibiofilm, and Antioxidant Activities of Aqueous Crude Gymnema inodorum Leaf Extract against Vancomycin-Resistant Enterococcus faecium. Microorganisms 2024; 12:1399. [PMID: 39065167 PMCID: PMC11278954 DOI: 10.3390/microorganisms12071399] [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: 06/23/2024] [Revised: 07/06/2024] [Accepted: 07/09/2024] [Indexed: 07/28/2024] Open
Abstract
Vancomycin-resistant Enterococcus faecium (VREF) causes nosocomial infections with high mortality and morbidity rates. This study aimed to evaluate the antibacterial and antibiofilm activities of aqueous crude Gymnema inodorum leaf extract (GIE) against the VREF ATCC 700221 strain. The antimicrobial activity of GIE against VREF was performed using disk diffusion and broth microdilution. The antibiofilm activities were evaluated using the crystal violet staining assay. The antioxidant potential was evaluated. Preliminary screening of the antimicrobial activity of 50 and 100 µg/disk of GIE against VREF revealed inhibition zones of 8.33 ± 0.58 mm and 8.67 ± 0.29 mm, respectively. Additionally, the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values against VREF were 125 and ≥ 250 mg/mL, respectively. SEM analysis showed that treatment with GIE caused morphological changes, including incomplete cell division, damaged cell walls, and cell content leakage, suggesting a disruption of bacterial cells. GIE also inhibited and eradicated biofilms formed by VREF. The extract exhibited antioxidant activities in the DPPH and ABTS assays. While GIE shows potential as an antibacterial and antibiofilm agent, further studies are necessary to fully understand the underlying mechanisms and optimize its use for therapeutic applications.
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Affiliation(s)
- Sakaewan Ounjaijean
- Research Institute for Health Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Voravuth Somsak
- School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Research Excellence Center for Innovation and Health Products, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Morteza Saki
- Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran;
| | - Watcharapong Mitsuwan
- Akkhraratchakumari Veterinary College, Walailak University, Nakhon Si Thammarat 80160, Thailand;
- Center of Excellence in Innovation of Essential Oil and Bioactive Compounds, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Chonticha Romyasamit
- School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Center of Excellence in Innovation of Essential Oil and Bioactive Compounds, Walailak University, Nakhon Si Thammarat 80160, Thailand
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Marey MA, Abozahra R, El-Nikhely NA, Kamal MF, Abdelhamid SM, El-Kholy MA. Transforming microbial pigment into therapeutic revelation: extraction and characterization of pyocyanin from Pseudomonas aeruginosa and its therapeutic potential as an antibacterial and anticancer agent. Microb Cell Fact 2024; 23:174. [PMID: 38867319 PMCID: PMC11170807 DOI: 10.1186/s12934-024-02438-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Accepted: 05/23/2024] [Indexed: 06/14/2024] Open
Abstract
BACKGROUND The objectives of the current study were to extract pyocyanin from Pseudomonas aeruginosa clinical isolates, characterize its chemical nature, and assess its biological activity against different bacteria and cancer cells. Due to its diverse bioactive properties, pyocyanin, being one of the virulence factors of P. aeruginosa, holds a promising, safe, and available therapeutic potential. METHODS 30 clinical P. aeruginosa isolates were collected from different sources of infections and identified by routine methods, the VITEK 2 compact system, and 16 S rRNA. The phenazine-modifying genes (phzM, phzS) were identified using polymerase chain reaction (PCR). Pyocyanin chemical characterization included UV-Vis spectrophotometry, Fourier Transform Infra-Red spectroscopy (FTIR), Gas Chromatography-Mass Spectrometry (GC-MS), and Liquid Chromatography-Mass Spectrometry (LC-MS). The biological activity of pyocyanin was explored by determining the MIC values against different clinical bacterial strains and assessing its anticancer activity against A549, MDA-MB-231, and Caco-2 cancer cell lines using cytotoxicity, wound healing and colony forming assays. RESULTS All identified isolates harboured at least one of the phzM or phzS genes. The co-presence of both genes was demonstrated in 13 isolates. The UV-VIS absorbance peaks were maxima at 215, 265, 385, and 520 nm. FTIR could identify the characteristic pyocyanin functional groups, whereas both GC-MS and LC-MS elucidated the chemical formula C11H18N2O2, with a molecular weight 210. The quadri-technical analytical approaches confirmed the chemical nature of the extracted pyocyanin. The extract showed broad-spectrum antibacterial activity, with the greatest activity against Bacillus, Staphylococcus, and Streptococcus species (MICs 31.25-125 µg/mL), followed by E. coli isolates (MICs 250-1000 µg/mL). Regarding the anticancer activity, the pyocyanin extract showed IC50 values against A549, MDA-MB-231, and Caco-2 cancer cell lines of 130, 105, and 187.9 µg/mL, respectively. Furthermore, pyocyanin has markedly suppressed colony formation and migratory abilities in these cells. CONCLUSIONS The extracted pyocyanin has demonstrated to be a potentially effective candidate against various bacterial infections and cancers. Hence, the current findings could contribute to producing this natural compound easily through an affordable method. Nonetheless, future studies are required to investigate pyocyanin's effects in vivo and analyse the results of combining it with other traditional antibiotics or anticancer drugs.
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Affiliation(s)
- Moustafa A Marey
- Department of Microbiology and Biotechnology, Division of Clinical and Biological Sciences, College of Pharmacy, Arab Academy for Science, Technology and Maritime Transport (AASTMT), Abu Kir Campus, P.O. Box 1029, Alexandria, Egypt
| | - Rania Abozahra
- Microbiology and Immunology Department, Faculty of Pharmacy, Damanhour University, Damanhour, Egypt
| | - Nefertiti A El-Nikhely
- Department of Biotechnology, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Miranda F Kamal
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Damanhour University, Beheira, Egypt
| | - Sarah M Abdelhamid
- Microbiology and Immunology Department, Faculty of Pharmacy, Damanhour University, Damanhour, Egypt
| | - Mohammed A El-Kholy
- Department of Microbiology and Biotechnology, Division of Clinical and Biological Sciences, College of Pharmacy, Arab Academy for Science, Technology and Maritime Transport (AASTMT), Abu Kir Campus, P.O. Box 1029, Alexandria, Egypt.
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Salpadoru T, Pinks KE, Lieberman JA, Cotton K, Wozniak KL, Gerasimchuk N, Patrauchan MA. Novel antimony-based antimicrobial drug targets membranes of Gram-positive and Gram-negative bacterial pathogens. Microbiol Spectr 2024; 12:e0423423. [PMID: 38651882 PMCID: PMC11237720 DOI: 10.1128/spectrum.04234-23] [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: 12/21/2023] [Accepted: 03/25/2024] [Indexed: 04/25/2024] Open
Abstract
Antimicrobial resistance (AMR) poses a significant worldwide public health crisis that continues to threaten our ability to successfully treat bacterial infections. With the decline in effectiveness of conventional antimicrobial therapies and the lack of new antibiotic pipelines, there is a renewed interest in exploring the potential of metal-based antimicrobial compounds. Antimony-based compounds with a long history of use in medicine have re-emerged as potential antimicrobial agents. We previously synthesized a series of novel organoantimony(V) compounds complexed with cyanoximates with a strong potential of antimicrobial activity against several AMR bacterial and fungal pathogens. Here, five selected compounds were studied for their antibacterial efficacy against three important bacterial pathogens: Pseudomonas aeruginosa, Escherichia coli, and Staphylococcus aureus. Among five tested compounds, SbPh4ACO showed antimicrobial activity against all three bacterial strains with the MIC of 50-100 µg/mL. The minimum bactericidal concentration/MIC values were less than or equal to 4 indicating that the effects of SbPh4ACO are bactericidal. Moreover, ultra-thin electron microscopy revealed that SbPh4ACO treatment caused membrane disruption in all three strains, which was further validated by increased membrane permeability. We also showed that SbPh4ACO acted synergistically with the antibiotics, polymyxin B and cefoxitin used to treat AMR strains of P. aeruginosa and S. aureus, respectively, and that at synergistic MIC concentration 12.5 µg/mL, its cytotoxicity against the cell lines, Hela, McCoy, and A549 dropped below the threshold. Overall, the results highlight the antimicrobial potential of novel antimony-based compound, SbPh4ACO, and its use as a potentiator of other antibiotics against both Gram-positive and Gram-negative bacterial pathogens. IMPORTANCE Antibiotic resistance presents a critical global public health crisis that threatens our ability to combat bacterial infections. In light of the declining efficacy of traditional antibiotics, the use of alternative solutions, such as metal-based antimicrobial compounds, has gained renewed interest. Based on the previously synthesized innovative organoantimony(V) compounds, we selected and further characterized the antibacterial efficacy of five of them against three important Gram-positive and Gram-negative bacterial pathogens. Among these compounds, SbPh4ACO showed broad-spectrum bactericidal activity, with membrane-disrupting effects against all three pathogens. Furthermore, we revealed the synergistic potential of SbPh4ACO when combined with antibiotics, such as cefoxitin, at concentrations that exert no cytotoxic effects tested on three mammalian cell lines. This study offers the first report on the mechanisms of action of novel antimony-based antimicrobial and presents the therapeutic potential of SbPh4ACO in combating both Gram-positive and Gram-negative bacterial pathogens while enhancing the efficacy of existing antibiotics.
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Affiliation(s)
- Tarosha Salpadoru
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Kevin E. Pinks
- Department of Chemistry and Biochemistry, Missouri State University, Springfield, Missouri, USA
| | - Jacob A. Lieberman
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Kaitlyn Cotton
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Karen L. Wozniak
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma, USA
| | - Nikolay Gerasimchuk
- Department of Chemistry and Biochemistry, Missouri State University, Springfield, Missouri, USA
| | - Marianna A. Patrauchan
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma, USA
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Seidel RW, Goddard R, Lang M, Richter A. Nα-Aroyl-N-Aryl-Phenylalanine Amides: A Promising Class of Antimycobacterial Agents Targeting the RNA Polymerase. Chem Biodivers 2024; 21:e202400267. [PMID: 38588490 DOI: 10.1002/cbdv.202400267] [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: 01/30/2024] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/10/2024]
Abstract
Tuberculosis (TB), caused by Mycobacterium tuberculosis, remains the leading cause of death from a bacterium in the world. The global prevalence of clinically relevant infections with opportunistically pathogenic non-tuberculous mycobacteria (NTM) has also been on the rise. Pharmacological treatment of both TB and NTM infections usually requires prolonged regimens of drug combinations, and is often challenging because of developed or inherent resistance to common antibiotic drugs. Medicinal chemistry efforts are thus needed to improve treatment options and therapeutic outcomes. Nα-aroyl-N-aryl-phenylalanine amides (AAPs) have been identified as potent antimycobacterial agents that target the RNA polymerase with a low probability of cross resistance to rifamycins, the clinically most important class of antibiotics known to inhibit the bacterial RNA polymerase. In this review, we describe recent developments in the field of AAPs, including synthesis, structural characterization, in vitro microbiological profiling, structure-activity relationships, physicochemical properties, pharmacokinetics and early cytotoxicity assessment.
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Affiliation(s)
- Rüdiger W Seidel
- Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - Richard Goddard
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Markus Lang
- Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
| | - Adrian Richter
- Institut für Pharmazie, Martin-Luther-Universität Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120, Halle (Saale), Germany
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Thadtapong N, Chaturongakul S, Napaswad C, Dubbs P, Soodvilai S. Enhancing effect of natural adjuvant, panduratin A, on antibacterial activity of colistin against multidrug-resistant Acinetobacter baumannii. Sci Rep 2024; 14:9863. [PMID: 38684853 PMCID: PMC11059350 DOI: 10.1038/s41598-024-60627-0] [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: 11/07/2023] [Accepted: 04/25/2024] [Indexed: 05/02/2024] Open
Abstract
Colistin- and carbapenem-resistant Acinetobacter baumannii is a serious multidrug resistant (MDR) bacterium in clinical settings. Discovery of new antibacterial drugs against MDR is facing multiple challenges in drug development. Combination of known antibiotics with a robust adjuvant might be an alternative effective strategy for MDR treatment. In the study herein, we report an antibiotic adjuvant activity of a natural compound panduratin A from fingerroot (Boesenbergia rotunda) as a potent adjuvant to colistin. The present study investigated the antibiotic adjuvant effect of panduratin A against 10 colistin- and carbapenem-resistant A. baumannii. Antibacterial activities were tested by broth microdilution method. Biofilm assay was used to determine the efficacy of panduratin A in biofilm formation inhibition on two representative strains Aci46 and Aci44. Genomic and transcriptomic analyses of colistin- and carbapenem-resistant A. baumannii strains were used to identify potential resistance and tolerance mechanism in the bacteria. Panduratin A-colistin combination showed an increased effect on antibacterial in the A. baumannii. However, panduratin A did not improve the antibacterial activity of imipenem. In addition, panduratin A improves anti-biofilm activity of colistin against Aci44 and Aci46, the colistin- and carbapenem-resistant A. baumannii. Panduratin A markedly enhances bactericidal and anti-biofilm activity of colistin against colistin- resistant A. baumannii. Based on genome comparisons, single nucleotide polymorphism (SNP) patterns in six genes encoding biofilm and lipid A biosynthesis were shared in Aci44 and Aci46. In Aci44, we identified a partial sequence of pmrB encoding a polymyxin resistant component PmrB, whereas a full length of pmrB was observed in Aci46. RNA-seq analyses of Aci44 revealed that panduratin A-colistin combination induced expression of ribosomal proteins and oxidative stress response proteins, whereas iron transporter and MFS-type transporter systems were suppressed. Panduratin A-colistin combination could promote intracellular reactive oxygen species (ROS) accumulation could lead to the cidal effect on colistin-resistant A. baumannii. Combination of panduratin A and colistin showed a significant increase in colistin efficacy against colistin- resistant A. baumannii in comparison of colistin alone. Genomic comparison between Aci44 and Aci46 showed mutations and SNPs that might affect different phenotypes. Additionally, based on RNA-Seq, panduratin A-colistin combination could lead to ROS production and accumulation. These findings confirmed the potency of panduratin as colistin adjuvant against multidrug resistant A. baumannii.
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Affiliation(s)
- Nalumon Thadtapong
- Research Center of Transport Protein for Medical Innovation, Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Soraya Chaturongakul
- Center for Advanced Therapeutics, Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, Thailand
| | - Chanita Napaswad
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Padungsri Dubbs
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Sunhapas Soodvilai
- Research Center of Transport Protein for Medical Innovation, Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand.
- Excellent Center for Drug Discovery, Mahidol University, Bangkok, Thailand.
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Malik AK, Singh C, Tiwari P, Verma D, Mehata AK, Vikas, Setia A, Mukherjee A, Muthu MS. Nanofibers of N,N,N-trimethyl chitosan capped bimetallic nanoparticles: Preparation, characterization, wound dressing and in vivo treatment of MDR microbial infection and tracking by optical and photoacoustic imaging. Int J Biol Macromol 2024; 263:130154. [PMID: 38354928 DOI: 10.1016/j.ijbiomac.2024.130154] [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: 11/25/2023] [Revised: 01/26/2024] [Accepted: 02/11/2024] [Indexed: 02/16/2024]
Abstract
Recent advancements in wound care have led to the development of interactive wound dressings utilizing nanotechnology, aimed at enhancing healing and combating bacterial infections while adhering to established protocols. Our novel wound dressings consist of N,N,N-trimethyl chitosan capped gold‑silver nanoparticles (Au-Ag-TMC-NPs), with a mean size of 108.3 ± 8.4 nm and a zeta potential of +54.4 ± 1.8 mV. These optimized nanoparticles exhibit potent antibacterial and antifungal properties, with minimum inhibitory concentrations ranging from 0.390 μg ml-1 to 3.125 μg ml-1 and also exhibited promising zones of inhibition against multi-drug resistant strains of S. aureus, E. coli, P. aeruginosa, and C. albicans. Microbial transmission electron microscopy reveals substantial damage to cell walls and DNA condensation post-treatment. Furthermore, the nanoparticles demonstrate remarkable inhibition of microbial efflux pumps and are non-hemolytic in human blood. Incorporated into polyvinyl alcohol/chitosan nanofibers, they form Au-Ag-TMC-NPs-NFs with diameters of 100-350 nm, facilitating efficient antimicrobial wound dressing. In vivo studies on MDR microbial-infected wounds in mice showed 99.34 % wound healing rate within 12 days, corroborated by analyses of wound marker protein expression levels and advanced imaging techniques such as ultrasound/photoacoustic imaging, providing real-time visualization and blood flow assessment for a comprehensive understanding of the dynamic wound healing processes.
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Affiliation(s)
- Ankit Kumar Malik
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221005, UP, India
| | - Chandrashekhar Singh
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221005, UP, India
| | - Punit Tiwari
- Department of Microbiology, Institute of Medical Sciences, BHU, Varanasi 221005, UP, India
| | - Dipti Verma
- Department of Molecular and Human Genetics, Institute of Science, Banaras Hindu University, Varanasi 221005, UP, India
| | - Abhishesh Kumar Mehata
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221005, UP, India
| | - Vikas
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221005, UP, India
| | - Aseem Setia
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221005, UP, India
| | - Ashim Mukherjee
- Department of Molecular and Human Genetics, Institute of Science, Banaras Hindu University, Varanasi 221005, UP, India
| | - Madaswamy S Muthu
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221005, UP, India.
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Kim HW, Lee JW, Yu AR, Yoon HS, Kang M, Lee BS, Park HW, Lee SK, Whang J, Kim JS. Isoegomaketone exhibits potential as a new Mycobacterium abscessus inhibitor. Front Microbiol 2024; 15:1344914. [PMID: 38585695 PMCID: PMC10996855 DOI: 10.3389/fmicb.2024.1344914] [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: 11/27/2023] [Accepted: 02/15/2024] [Indexed: 04/09/2024] Open
Abstract
Although the incidence of Mycobacterium abscessus infection has recently increased significantly, treatment is difficult because this bacterium is resistant to most anti-tuberculosis drugs. In particular, M. abscessus is often resistant to available macrolide antibiotics, so therapeutic options are extremely limited. Hence, there is a pressing demand to create effective drugs or therapeutic regimens for M. abscessus infections. The aim of the investigation was to assess the capability of isoegomaketone (iEMK) as a therapeutic option for treating M. abscessus infections. We determined the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of iEMK for both reference and clinically isolated M. abscessus strains. In addition to time-kill and biofilm formation assays, we evaluated iEMK's capability to inhibit M. abscessus growth in macrophages using an intracellular colony counting assay. iEMK inhibited the growth of reference and clinically isolated M. abscessus strains in macrophages and demonstrated effectiveness at lower concentrations against macrophage-infected M. abscessus than when used to treat the bacteria directly. Importantly, iEMK also exhibited anti-biofilm properties and the potential to mitigate macrolide-inducible resistance, underscoring its promise as a standalone or adjunctive therapeutic agent. Overall, our results suggest that further development of iEMK as a clinical drug candidate is promising for inhibiting M. abscessus growth, especially considering its dual action against both planktonic bacteria and biofilms.
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Affiliation(s)
- Ho Won Kim
- Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon, Republic of Korea
| | - Ji Won Lee
- Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon, Republic of Korea
| | - A-Reum Yu
- Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon, Republic of Korea
| | - Hoe Sun Yoon
- Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon, Republic of Korea
| | - Minji Kang
- Korea Mycobacterium Resource Center (KMRC), Department of Research and Development, The Korean Institute of Tuberculosis, Osong, Republic of Korea
| | - Byung Soo Lee
- Department of Obstetrics and Gynecology, Konyang University Hospital, Daejeon, Republic of Korea
| | - Hwan-Woo Park
- Department of Cell Biology, Konyang University College of Medicine, Daejeon, Republic of Korea
| | - Sung Ki Lee
- Department of Obstetrics and Gynecology, Konyang University Hospital, Daejeon, Republic of Korea
| | - Jake Whang
- Korea Mycobacterium Resource Center (KMRC), Department of Research and Development, The Korean Institute of Tuberculosis, Osong, Republic of Korea
| | - Jong-Seok Kim
- Myunggok Medical Research Institute, College of Medicine, Konyang University, Daejeon, Republic of Korea
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Bhondwe P, Sengar N, Bodiwala HS, Singh IP, Panda D. An adamantyl-caffeoyl-anilide exhibits broad-spectrum antibacterial activity by inhibiting FtsZ assembly and Z-ring formation. Int J Biol Macromol 2024; 259:129255. [PMID: 38199552 DOI: 10.1016/j.ijbiomac.2024.129255] [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: 10/16/2023] [Revised: 01/01/2024] [Accepted: 01/03/2024] [Indexed: 01/12/2024]
Abstract
Several harmful bacteria have evolved resistance to conventional antibiotics due to their extensive usage. FtsZ, a principal bacterial cell division protein, is considered as an important drug target to combat resistance. We identified a caffeoyl anilide derivative, (E)-N-(4-(3-(3,4-dihydroxyphenyl)acryloyl)phenyl)-1-adamantylamide (compound 11) as a new antimicrobial agent targeting FtsZ. Compound 11 caused cell elongation in Mycobacterium smegmatis, Bacillus subtilis, and Escherichia coli cells, indicating that it inhibits cell partitioning. Compound 11 inhibited the assembly of Mycobacterium smegmatis FtsZ (MsFtsZ), forming short and thin filaments in vitro. Interestingly, the compound increased the rate of GTP hydrolysis of MsFtsZ. Compound 11 also impeded the assembly of Mycobacterium tuberculosis FtsZ. Fluorescence and absorption spectroscopic analysis suggested that compound 11 binds to MsFtsZ and produces conformational changes in FtsZ. The docking analysis indicated that the compound binds at the interdomain cleft of MsFtsZ. Further, it caused delocalization of the Z-ring in Mycobacterium smegmatis and Bacillus subtilis without affecting DNA segregation. Notably, compound 11 did not inhibit tubulin polymerization, the eukaryotic homolog of FtsZ, suggesting its specificity on bacteria. The evidence indicated that compound 11 exerts its antibacterial effect by impeding FtsZ assembly and has the potential to be developed as a broad-spectrum antimicrobial agent.
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Affiliation(s)
- Prajakta Bhondwe
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Neha Sengar
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, Mohali 160062, Punjab, India
| | - Hardik S Bodiwala
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, Mohali 160062, Punjab, India
| | - Inder Pal Singh
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, Mohali 160062, Punjab, India
| | - Dulal Panda
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, India; Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, Mohali 160062, Punjab, India.
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10
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Habibah FF, Sri Rizki WO, Ivansyah AL, Astuti DI, Hertadi R. Green synthesis of copper ions nanoparticles functionalized with rhamnolipid as potential antibacterial agent for pathogenic bacteria. Heliyon 2024; 10:e24242. [PMID: 38234879 PMCID: PMC10792634 DOI: 10.1016/j.heliyon.2024.e24242] [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: 08/31/2023] [Revised: 11/19/2023] [Accepted: 01/04/2024] [Indexed: 01/19/2024] Open
Abstract
Copper-based nanoparticles possess broad-spectrum antibacterial activity against both gram-positive and gram-negative bacteria, making them a cost-effective alternative to other metal-based nanoparticles. The development of eco-friendly copper based nanopaticles using biodegradable and non-toxic biosurfactants, such as rhamnolipid is being explored in this study. In the present study, Cu(I)-rhamnolipid nanoparticles (Cu(I)-Rl Nps) was prepared by coprecipitation method. The structural analysis by using FTIR and XRD techniques revealed that Cu(I)-Rl Nps was successfully produced, as indicated by the detectable of ionic and covalent-coordinations bond between rhamnolipid and Cu(I) ions. Further analysis using TEM, PSA and ZPA suggest that the resulted Cu(I)-Rl Nps have spherical shape with the diameter range of 141.7-536.3 nm and the surface charge of -30 mV, respectively. The antibacterial activity of Cu(I)-Rl Nps surpassed that of the copper-based nanoparticles, free-state Cu(I) ions and rhamnolipid, which was determined by MIC/MBC methods. The Cu(I)-Rl Nps inhibition to the growth of Bacillus subtilis ATCC 6633 (Gram-positive) gave the MIC/MBC values of 19/19 μg/mL, while the copper-based nanoparticles, free-state Cu(I) ions and rhamnolipid gave the MIC/MBC value of 1250/2500, 1250/1250, 62/62 μg/mL, respectively. Further test on Escherichia coli ATCC 6538 (Gram-negative) showed that the Cu(I)-Rl Nps gave the MIC/MBC value of 78/78 μg/mL, while the copper-based nanoparticles, free-state Cu(I) ions and rhamnolipid gave the MIC/MBC value of 2500/2500, 2500/2500, 2000/2000 μg/mL, respectively. The increased antibacterial activity of Cu(I)-Rl Nps was due to the synergistic effects between Cu(I) and rhamnolipid.
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Affiliation(s)
- Fera Faridatul Habibah
- Biochemistry Research Division, Faculty of Mathematics and Natural Sciences, Institute Technology Bandung, Bandung, Indonesia
| | - Wa Ode Sri Rizki
- Biochemistry Research Division, Faculty of Mathematics and Natural Sciences, Institute Technology Bandung, Bandung, Indonesia
| | - Atthar Luqman Ivansyah
- Analytical Chemistry Research Division, Faculty of Mathematics and Natural Sciences, Institute Technology Bandung, Bandung, Indonesia
| | - Dea Indriani Astuti
- Microbial Biotechnology Research Division, School of Life Science and Technology, Institute Technology Bandung, Bandung, Indonesia
| | - Rukman Hertadi
- Biochemistry Research Division, Faculty of Mathematics and Natural Sciences, Institute Technology Bandung, Bandung, Indonesia
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11
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Coandă M, Limban C, Nuță DC. Small Schiff Base Molecules-A Possible Strategy to Combat Biofilm-Related Infections. Antibiotics (Basel) 2024; 13:75. [PMID: 38247634 PMCID: PMC10812491 DOI: 10.3390/antibiotics13010075] [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: 12/13/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 01/23/2024] Open
Abstract
Microorganisms participating in the development of biofilms exhibit heightened resistance to antibiotic treatment, therefore infections involving biofilms have become a problem in recent years as they are more difficult to treat. Consequently, research efforts are directed towards identifying novel molecules that not only possess antimicrobial properties but also demonstrate efficacy against biofilms. While numerous investigations have focused on antimicrobial capabilities of Schiff bases, their potential as antibiofilm agents remains largely unexplored. Thus, the objective of this article is to present a comprehensive overview of the existing scientific literature pertaining to small molecules categorized as Schiff bases with antibiofilm properties. The survey involved querying four databases (Web of Science, ScienceDirect, Scopus and Reaxys). Relevant articles published in the last 10 years were selected and categorized based on the molecular structure into two groups: classical Schiff bases and oximes and hydrazones. Despite the majority of studies indicating a moderate antibiofilm potential of Schiff bases, certain compounds exhibited a noteworthy effect, underscoring the significance of considering this type of molecular modeling when seeking to develop new molecules with antibiofilm effects.
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Affiliation(s)
| | - Carmen Limban
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Carol Davila University of Medicine and Pharmacy, 6 Traian Vuia Str., 020950 Bucharest, Romania; (M.C.); (D.C.N.)
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Zore M, San-Martin-Galindo P, Reigada I, Hanski L, Fallarero A, Yli-Kauhaluoma J, Patel JZ. Design and synthesis of etrasimod derivatives as potent antibacterial agents against Gram-positive bacteria. Eur J Med Chem 2024; 263:115921. [PMID: 37948883 DOI: 10.1016/j.ejmech.2023.115921] [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: 09/14/2023] [Revised: 10/19/2023] [Accepted: 10/27/2023] [Indexed: 11/12/2023]
Abstract
The emergence of multidrug-resistant bacteria along with a declining pipeline of clinically useful antibiotics has led to the urgent need for the development of more effective antibacterial agents. Inspired by our recent report on the antibacterial activity of etrasimod, an immunomodulating drug candidate, we prepared a series of etrasimod derivatives by varying substituents on the phenyl ring, altering the central tricyclic aromatic ring, and modifying the carboxyl group. From this series of compounds, indole derivative 24f was identified as the most potent antibacterial compound, with the minimum inhibitory concentration (MIC) values between 2.5 and 10 μM against various Gram-positive bacteria, including methicillin-resistant Staphylococcus aureus (MRSA), S. epidermidis and enterococci. Moreover, 24f exhibited rapid bactericidal activity against S. aureus, low toxicity and hemolytic activity, and a synergistic effect with gentamicin against S. aureus, MRSA, and Enterococcus faecalis. Furthermore, it was shown that neither etrasimod nor 24f affects S. aureus cell membranes. Importantly, 24f did not induce resistance in S. aureus, representing a significant improvement compared to etrasimod. Finally, the antibacterial activity of etrasimod and 24f against S. aureus and MRSA was confirmed in vivo in a Caenorhabditis elegans infection model. Taken together, our study highlights the value of etrasimod and its derivatives as potential antibacterial candidates for combating infections caused by Gram-positive bacteria.
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Affiliation(s)
- Matej Zore
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00014, Helsinki, Finland
| | - Paola San-Martin-Galindo
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00014, Helsinki, Finland
| | - Inés Reigada
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00014, Helsinki, Finland
| | - Leena Hanski
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00014, Helsinki, Finland
| | - Adyary Fallarero
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00014, Helsinki, Finland
| | - Jari Yli-Kauhaluoma
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00014, Helsinki, Finland
| | - Jayendra Z Patel
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00014, Helsinki, Finland.
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Mokhtar A, Souhila T, Nacéra B, Amina B, Alghonaim MI, Öztürk M, Alsalamah SA, Miara MD, Boufahja F, Bendif H. In Vitro Antibacterial, Antioxidant, Anticholinesterase, and Antidiabetic Activities and Chemical Composition of Salvia balansae. Molecules 2023; 28:7801. [PMID: 38067531 PMCID: PMC10708212 DOI: 10.3390/molecules28237801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 12/18/2023] Open
Abstract
CONTEXT Salvia balansae de Noé (S. balansae) (Lamiaceae) is known to be an important plant used in folk medicine as an herbal remedy in Algeria. OBJECTIVE The purpose of the present study was to demonstrate the phytochemical composition, antioxidant activities, enzyme inhibitory activities, and antimicrobial activities of S. balansae extracts. MATERIALS AND METHODS A methanolic extract and a petroleum ether extract from the aerial parts of the plant were assessed for their chemical composition. HPLC-MS and HPLC-DAD assessed the content of phenols, GC-MS the fatty acid composition, and ICP-MS the mineral profiles of the plant. Additionally, we evaluated the bioactivities of S. balansae extracts by the DPPH, ABTS, and CUPRAC assays, including the antioxidant potential against AChE, BChE, α-amylase, and α-glucosidase for enzyme inhibition. The antibacterial and antifungal activities of the methanolic extract were determined by the disc diffusion test against several strains of bacteria and yeasts. RESULTS Our findings revealed that the aerial parts of S. balansae were rich in phytochemical components and contained large amounts of minerals. Quantitative analysis of phenolic compounds by HPLC-DAD revealed the presence of 12 compounds in three major classes, flavonoids, hydroxycinnamic acid, and phenolic acid derivatives, with 0.61, 0.45, and 0.29 mg/g of extract, respectively. Nine phenolic constituents were quantified by HPLC-MS analysis; catechin (72.5%) was the main compound, followed by myricetin (21.7%). The fatty acid composition of the S. balansae petroleum ether extract by GC-MS analysis was quantified. Seventeen compounds, including palmitic acid, were identified as the major fatty acids. The antioxidant activity of the S. balansae extracts was measured by three different methods: the methanol extract provided better results than the petroleum ether extract, and interesting values were noted for the DPPH, ABTS, and CUPRAC assays of 242.7 ± 7.44, 124.1 ± 9.70, and 222.9 ± 6.05 µg/mL, respectively. The enzyme inhibition activity of the plant could not be determined. The antimicrobial results of the methanolic extract obtained from the disc diffusion method, followed by measurements of MIC, MBC, and MFC against several bacteria and yeasts, indicated that S. balansae exhibited noticeable antimicrobial and antifungal activities. CONCLUSIONS These results provided new data about the main phenolic compounds and biological activities of extracts of the aerial parts of S. balansae, which might be an alternative source for synthetic bioactive compounds.
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Affiliation(s)
- Amırat Mokhtar
- Institute of Veterinary Sciences, University Ibn-Khaldoun of Tiaret, Tiaret 14000, Algeria;
| | - Tabak Souhila
- Department of Nature and Life Sciences, Faculty of Life and Nature Sciences, University of Tiaret, Tiaret 14000, Algeria; (T.S.); (B.N.); (M.D.M.)
| | - Bouriah Nacéra
- Department of Nature and Life Sciences, Faculty of Life and Nature Sciences, University of Tiaret, Tiaret 14000, Algeria; (T.S.); (B.N.); (M.D.M.)
| | - Benabdallah Amina
- Department of Agronomy, Faculty of Life and Nature Sciences, University Chadli Bendjedid, El-Tarf 36000, Algeria;
| | - Mohammed I. Alghonaim
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia; (M.I.A.); (S.A.A.)
| | - Mehmet Öztürk
- Department of Chemistry, Faculty of Sciences, Muğla Sıtkı Koçman University, Muğla 48121, Türkiye;
| | - Sulaiman A. Alsalamah
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia; (M.I.A.); (S.A.A.)
| | - Mohamed Djamel Miara
- Department of Nature and Life Sciences, Faculty of Life and Nature Sciences, University of Tiaret, Tiaret 14000, Algeria; (T.S.); (B.N.); (M.D.M.)
| | - Fehmi Boufahja
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia; (M.I.A.); (S.A.A.)
| | - Hamdi Bendif
- Laboratory of Ethnobotany and Natural Substances, ENS de Kouba, Algiers 16308, Algeria;
- Faculty of Sciences, University of M’sila, P.O. Box 166, M’Sila 28000, Algeria
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14
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Pernas-Pleite C, Conejo-Martínez AM, Fernández Freire P, Hazen MJ, Marín I, Abad JP. Microalga Broths Synthesize Antibacterial and Non-Cytotoxic Silver Nanoparticles Showing Synergy with Antibiotics and Bacterial ROS Induction and Can Be Reused for Successive AgNP Batches. Int J Mol Sci 2023; 24:16183. [PMID: 38003373 PMCID: PMC10670984 DOI: 10.3390/ijms242216183] [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: 09/26/2023] [Revised: 10/31/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
The era of increasing bacterial antibiotic resistance requires new approaches to fight infections. With this purpose, silver-based nanomaterials are a reality in some fields and promise new developments. We report the green synthesis of silver nanoparticles (AgNPs) using culture broths from a microalga. Broths from two media, with different compositions and pHs and sampled at two growth phases, produced eight AgNP types. Nanoparticles harvested after several synthesis periods showed differences in antibacterial activity and stability. Moreover, an evaluation of the broths for several consecutive syntheses did not find relevant kinetics or activity differences until the third round. Physicochemical characteristics of the AgNPs (core and hydrodynamic sizes, Z-potential, crystallinity, and corona composition) were determined, observing differences depending on the broths used. AgNPs showed good antibacterial activity at concentrations producing no or low cytotoxicity on cultured eukaryotic cells. All the AgNPs had high levels of synergy against Escherichia coli and Staphylococcus aureus with the classic antibiotics streptomycin and kanamycin, but with ampicillin only against S. aureus and tetracycline against E. coli. Differences in the synergy levels were also dependent on the types of AgNPs. We also found that, for some AgNPs, the killing of bacteria started before the massive accumulation of ROS.
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Affiliation(s)
- Carlos Pernas-Pleite
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Amparo M. Conejo-Martínez
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Paloma Fernández Freire
- Department of Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 29049 Madrid, Spain
| | - María José Hazen
- Department of Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 29049 Madrid, Spain
| | - Irma Marín
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
| | - José P. Abad
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
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15
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Allizond V, Cavallo L, Roana J, Mandras N, Cuffini AM, Tullio V, Banche G. In Vitro Antifungal Activity of Selected Essential Oils against Drug-Resistant Clinical Aspergillus spp. Strains. Molecules 2023; 28:7259. [PMID: 37959679 PMCID: PMC10650698 DOI: 10.3390/molecules28217259] [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: 09/08/2023] [Revised: 10/14/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
BACKGROUND Treatment options for aspergillosis include amphotericin B (AMB) and azole compounds, such as itraconazole (ITZ). However, serious side effects related to these antifungal agents are increasingly evident, and resistance continues to increase. Currently, a new trend in drug discovery to overcome this problem is represented by natural products from plants, or their extracts. Particularly, there is a great interest in essential oils (EOs) recognized for their antimicrobial role towards bacteria, fungi and viruses. METHODS In this study, we evaluated the antifungal activity of eleven commercial EOs-clove, eucalyptus, geranium, hybrid lavender, lavender, lemon, lemongrass, neroli, oregano, tea tree and red red thyme-in comparison with AMB and ITZ against Aspergillus flavus, A. fumigatus and A. niger clinical isolates. Antifungal activity was determined by broth microdilution method, agar diffusion technique, fungistatic and fungicidal activities and vapor contact assay. RESULTS Gas chromatography-mass spectrometry analysis displayed two groups of distinct biosynthetical origin: monoterpenes dominated the chemical composition of the most oils. Only two aromatic compounds (eugenol 78.91% and eugenyl acetate 11.64%) have been identified as major components in clove EO. Lemongrass EO exhibits the strongest antimicrobial activity with a minimum inhibitory concentration of 0.56 mg/mL and a minimum fungicidal concentration of 2.25-4.5 mg/mL against Aspergillus spp. strains. Clove and geranium EOs were fairly effective in inhibiting Aspergillus spp. growth. CONCLUSIONS These results demonstrate the antimicrobial potential of some EOs and support the research of new alternatives or complementary therapies based on EOs.
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Affiliation(s)
| | | | | | - Narcisa Mandras
- Department Public Health and Pediatrics, Microbiology Division, University of Torino, 10126 Turin, Italy; (V.A.); (L.C.); (J.R.); (A.M.C.); (V.T.); (G.B.)
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16
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Toader G, Diacon A, Rusen E, Mangalagiu II, Alexandru M, Zorilă FL, Mocanu A, Boldeiu A, Gavrilă AM, Trică B, Pulpea D, Necolau MI, Istrate M. Peelable Alginate Films Reinforced by Carbon Nanofibers Decorated with Antimicrobial Nanoparticles for Immediate Biological Decontamination of Surfaces. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2775. [PMID: 37887926 PMCID: PMC10609245 DOI: 10.3390/nano13202775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 10/13/2023] [Accepted: 10/13/2023] [Indexed: 10/28/2023]
Abstract
This study presents the synthesis and characterization of alginate-based nanocomposite peelable films, reinforced by carbon nanofibers (CNFs) decorated with nanoparticles that possess remarkable antimicrobial properties. These materials are suitable for immediate decontamination applications, being designed as fluid formulations that can be applied on contaminated surfaces, and subsequently, they can rapidly form a peelable film via divalent ion crosslinking and can be easily peeled and disposed of. Silver, copper, and zinc oxide nanoparticles (NPs) were synthesized using superficial oxidized carbon nanofibers (CNF-ox) as support. To obtain the decontaminating formulations, sodium alginate (ALG) was further incorporated into the colloidal solutions containing the antimicrobial nanoparticles. The properties of the initial CNF-ox-NP-ALG solutions and the resulting peelable nanocomposite hydrogels (obtained by crosslinking with zinc acetate) were assessed by rheological measurements, and mechanical investigations, respectively. The evaluation of Minimal Inhibitory Concentration (MIC) and Minimal Bactericidal Concentration (MBC) for the synthesized nanoparticles (silver, copper, and zinc oxide) was performed. The best values for MIC and MBC were obtained for CNF-ox decorated with AgNPs for both types of bacterial strains: Gram-negative (MIC and MBC values (mg/L): E. coli-3 and 108; P. aeruginosa-3 and 54) and Gram-positive (MIC and MBC values (mg/L): S. aureus-13 and 27). The film-forming decontaminating formulations were also subjected to a microbiology assay consisting of the time-kill test, MIC and MBC estimations, and evaluation of the efficacity of peelable coatings in removing the biological agents from the contaminated surfaces. The best decontamination efficiencies against Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa varied between 97.40% and 99.95% when employing silver-decorated CNF-ox in the decontaminating formulations. These results reveal an enhanced antimicrobial activity brought about by the synergistic effect of silver and CNF-ox, coupled with an efficient incorporation of the contaminants inside the peelable films.
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Affiliation(s)
- Gabriela Toader
- Military Technical Academy “Ferdinand I”, 39-49 G. Cosbuc Blvd., 050141 Bucharest, Romania; (G.T.); (A.D.); (D.P.)
| | - Aurel Diacon
- Military Technical Academy “Ferdinand I”, 39-49 G. Cosbuc Blvd., 050141 Bucharest, Romania; (G.T.); (A.D.); (D.P.)
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Gh. Polizu Street, 011061 Bucharest, Romania; (A.M.); (M.I.N.)
| | - Edina Rusen
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Gh. Polizu Street, 011061 Bucharest, Romania; (A.M.); (M.I.N.)
| | - Ionel I. Mangalagiu
- Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, 11 Carol 1st Blvd., 700506 Iasi, Romania
| | - Mioara Alexandru
- Microbiology Laboratory, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, 30 Reactorului St., 077125 Bucharest, Romania; (M.A.); (F.L.Z.)
| | - Florina Lucica Zorilă
- Microbiology Laboratory, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, 30 Reactorului St., 077125 Bucharest, Romania; (M.A.); (F.L.Z.)
- Department of Genetics, Faculty of Biology, University of Bucharest, 91-95 Splaiul Indepententei, 050095 Bucharest, Romania
| | - Alexandra Mocanu
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Gh. Polizu Street, 011061 Bucharest, Romania; (A.M.); (M.I.N.)
- National Institute for Research and Development in Microtechnologies—IMT Bucharest, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania;
| | - Adina Boldeiu
- National Institute for Research and Development in Microtechnologies—IMT Bucharest, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania;
| | - Ana Mihaela Gavrilă
- National Institute of Research and Development for Chemistry and Petrochemistry, 202 Splaiul Independentei, 060041 Bucharest, Romania; (A.M.G.); (B.T.)
| | - Bogdan Trică
- National Institute of Research and Development for Chemistry and Petrochemistry, 202 Splaiul Independentei, 060041 Bucharest, Romania; (A.M.G.); (B.T.)
| | - Daniela Pulpea
- Military Technical Academy “Ferdinand I”, 39-49 G. Cosbuc Blvd., 050141 Bucharest, Romania; (G.T.); (A.D.); (D.P.)
| | - Mădălina Ioana Necolau
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Gh. Polizu Street, 011061 Bucharest, Romania; (A.M.); (M.I.N.)
- Advanced Polymer Materials Group, University Politehnica of Bucharest, 1-7 Polizu Street, 011061 Bucharest, Romania
| | - Marcel Istrate
- S.C. Stimpex S.A., 46-48 Nicolae Teclu Street, 032368 Bucharest, Romania;
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Arivuselvam R, Dera AA, Parween Ali S, Alraey Y, Saif A, Hani U, Arumugam Ramakrishnan S, Azeeze MSTA, Rajeshkumar R, Susil A, Harindranath H, Kumar BRP. Isolation, Identification, and Antibacterial Properties of Prodigiosin, a Bioactive Product Produced by a New Serratia marcescens JSSCPM1 Strain: Exploring the Biosynthetic Gene Clusters of Serratia Species for Biological Applications. Antibiotics (Basel) 2023; 12:1466. [PMID: 37760761 PMCID: PMC10526024 DOI: 10.3390/antibiotics12091466] [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: 08/27/2023] [Revised: 09/13/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
Prodigiosin pigment has high medicinal value, so exploring this compound is a top priority. This report presents a prodigiosin bioactive compound isolated from Serratia marcescens JSSCPM1, a new strain. The purification process of this compound involves the application of different chromatographic methods, including UV-visible spectroscopy, high-performance liquid chromatography (HPLC), and liquid chromatography-mass spectrometry (LC/MS). Subsequent analysis was performed using nuclear magnetic resonance (NMR) to achieve a deeper understanding of the compound's structure. Finally, through a comprehensive review of the existing literature, the structural composition of the isolated bioactive compound was found to correspond to that of the well-known compound prodigiosin. The isolated prodigiosin compound was screened for antibacterial activity against both Gram-positive and Gram-negative bacteria. The compound inhibited the growth of Gram-negative bacterial strains compared with Gram-positive bacterial strains. It showed a maximum minimum inhibitory concentration against Escherichia coli NCIM 2065 at a 15.9 ± 0.31 μg/mL concentration. The potential binding capabilities between prodigiosin and the OmpF porin proteins (4GCS, 4GCP, and 4GCQ) were determined using in silico studies, which are generally the primary targets of different antibiotics. Comparative molecular docking analysis indicated that prodigiosin exhibits a good binding affinity toward these selected drug targets.
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Affiliation(s)
- Rajaguru Arivuselvam
- Department of Pharmaceutical Biotechnology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty 643001, TN, India; (R.A.); (S.A.R.)
- Department of Pharmaceutical Biotechnology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Sri Shivarathreeshwara Nagar, Mysore 570015, KA, India
| | - Ayed A. Dera
- Department of Clinical Laboratory Sciences, Central Research Laboratory, College of Applied Medical Sciences, King Khalid University, Abha 62529, Saudi Arabia; (A.A.D.); (S.P.A.); (Y.A.)
| | - Syed Parween Ali
- Department of Clinical Laboratory Sciences, Central Research Laboratory, College of Applied Medical Sciences, King Khalid University, Abha 62529, Saudi Arabia; (A.A.D.); (S.P.A.); (Y.A.)
| | - Yasser Alraey
- Department of Clinical Laboratory Sciences, Central Research Laboratory, College of Applied Medical Sciences, King Khalid University, Abha 62529, Saudi Arabia; (A.A.D.); (S.P.A.); (Y.A.)
| | - Ahmed Saif
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha 62529, Saudi Arabia;
| | - Umme Hani
- Department of Pharmaceutics, College of Pharmacy, King Khalid University, Guraiger, Abha 62529, Saudi Arabia;
| | - Sivaa Arumugam Ramakrishnan
- Department of Pharmaceutical Biotechnology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty 643001, TN, India; (R.A.); (S.A.R.)
- Department of Pharmaceutical Biotechnology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Sri Shivarathreeshwara Nagar, Mysore 570015, KA, India
| | | | - Raman Rajeshkumar
- Department of Pharmaceutical Biotechnology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty 643001, TN, India; (R.A.); (S.A.R.)
| | - Aishwarya Susil
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Sri Shivarathreeshwara Nagar, Mysore 570015, KA, India (H.H.)
| | - Haritha Harindranath
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Sri Shivarathreeshwara Nagar, Mysore 570015, KA, India (H.H.)
| | - B. R. Prashantha Kumar
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Sri Shivarathreeshwara Nagar, Mysore 570015, KA, India (H.H.)
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Osman EO, Emam SH, Sonousi A, Kandil MM, Abdou AM, Hassan RA. Design, synthesis, anticancer, and antibacterial evaluation of some quinazolinone-based derivatives as DHFR inhibitors. Drug Dev Res 2023; 84:888-906. [PMID: 37052308 DOI: 10.1002/ddr.22060] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/07/2023] [Accepted: 04/01/2023] [Indexed: 04/14/2023]
Abstract
Two series of quinazolinone derivatives were designed and synthesized as dihydrofolate reductase (DHFR) inhibitors. All compounds were evaluated for their antibacterial and antitumor activities. Antibacterial activity was evaluated against three strains of Gram-positive and Gram-negative bacteria. Compound 3d exhibited the highest inhibitory activity against Staphylococcus aureus DHFR (SaDHFR) with IC50 of 0.769 ± 0.04 μM compared to 0.255 ± 0.014 μM for trimethoprim. Compound 3e was also more potent than trimethoprim against Escherichia coli DHFR (EcDHFR) with IC50 of 0.158 ± 0.01 μM and 0.226 ± 0.014 μM, respectively. Compound 3e exhibited a promising antiproliferative effect against most of the tested cancer cells. It also showed potent activity against leukemia (CCRF-CEM, and RPMI-8226); lung NCI-H522, and CNS U251 with GI% of 65.2, 63.22, 73.28, and 97.22, respectively. The cytotoxic activity of compound 3e was almost half the activity of doxorubicin against CCRF-CEM cell line with IC50 of 1.569 ± 0.06 μM and 0.822 ± 0.03 µM, respectively. In addition, compound 3e inhibited human DHFR with IC50 value of 0.527 ± 0.028 µM in comparison to methotrexate (IC50 = 0.118 ± 0.006 µM). Compound 3e caused an arrest of the cell cycle mainly at the S phase and caused a rise in the overall apoptotic percentage from 2.03% to 48.51%. (23.89-fold). Treatment of CCRF-CEM cells with compound 3e produced a significant increase in the active caspase-3 level by 6.25-fold compared to untreated cells. Molecular modeling studies were performed to evaluate the binding pattern of the most active compounds in the bacterial and human DHFR.
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Affiliation(s)
- Eman O Osman
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Soha H Emam
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Amr Sonousi
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
- University of Hertfordshire Hosted by Global Academic Foundation, New Administrative Capital, Cairo, Egypt
| | - Mai M Kandil
- Department of Microbiology and Immunology, National Research Centre, Giza, Egypt
| | - Amr M Abdou
- Department of Microbiology and Immunology, National Research Centre, Giza, Egypt
| | - Rasha A Hassan
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
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Faisal S, Tariq MH, Ullah R, Zafar S, Rizwan M, Bibi N, Khattak A, Amir N, Abdullah. Exploring the antibacterial, antidiabetic, and anticancer potential of Mentha arvensis extract through in-silico and in-vitro analysis. BMC Complement Med Ther 2023; 23:267. [PMID: 37496047 PMCID: PMC10373235 DOI: 10.1186/s12906-023-04072-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/06/2023] [Indexed: 07/28/2023] Open
Abstract
BACKGROUND Mentha arvensis has been utilized in diverse traditional medicines as an antidiabetic, anticarcinogenic, antiallergic, antifungal, and antibacterial agent. In this work, we have explored the phytochemical analyses and pharmacological potential of Mentha arvensis using both in silico and in vitro approaches for drug discovery. METHODS To determine the extract with the highest potential for powerful bioactivity, ethanol was used as the solvent. The phytochemical components of the extracts were quantified using liquid chromatography-mass spectrometry analysis. The potential bioactivities of extracts and lead phytocompounds, including their antibacterial, cytotoxic, and anti-diabetic effects, were evaluated. RESULTS The compounds oleanolic acid, rosmarinic acid, luteolin, isoorientin, and ursolic acid have been identified through liquid chromatography mass spectrometry analysis. Based on antimicrobial research, it has been found that the Mentha arvensis extract shows potential activity against K. pneumoniae which was 13.39 ± 0.16. Mentha arvensis has demonstrated a greater degree of efficacy in inhibiting α-glucosidase, with an inhibition rate of 58.36 ± 0.12, and in inhibiting α-amylase, with an inhibition rate of 42.18 ± 0.83. The growth of HepG2 cells was observed to be significantly suppressed upon treatment with extracts obtained from Mentha arvensis. Finally, In-silico methods demonstrated that the Luteolin and Rosmarinic acid exhibit acceptable drug-like characteristics. Furthermore, Molecular docking studies further demonstrated that both compounds have strong potential to inhibit the active sites of therapeutically relevant enzymes involved in Diabetes, Bacterial infections, and Cancer. CONCLUSIONS The results of this study suggest that the Mentha arvensis extract possesses potent pharmacological potentials, particularly in terms of antibacterial, anti-diabetic, and cytotoxic effects. Particularly, Luteolin and Rosmarinic acid were identified as the top contenders for potential bioactivity with acceptable drug-like properties.
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Affiliation(s)
- Shah Faisal
- Institute of Biotechnology and Microbiology, Bacha Khan University, Charsadda, 24460, Pakistan.
| | | | - Riaz Ullah
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Sania Zafar
- Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, Multan, Pakistan
| | - Muhammad Rizwan
- Center for Biotechnology and Microbiology, University of Swat, Swat, Pakistan
| | - Nadia Bibi
- Department of Microbiology, Shaheed Benazir Bhutto Women University, Peshawar, Pakistan
| | - Aishma Khattak
- Department of Bioinformatics, Shaheed Benazir Bhutto Women University, Peshawar, Pakistan
| | - Noora Amir
- Center for Biotechnology and Microbiology, University of Swat, Swat, Pakistan
| | - Abdullah
- Department of Physical Chemistry and Technology of Polymers, Silesian University of Technology, M. Strzody 9, 44-100, Gliwice, Poland
- Joint Doctoral School, Silesian University of Technology, Akademicka 2A, 44-100, Gliwice, Poland
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20
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Drumond MM, Tapia-Costa AP, Neumann E, Nunes ÁC, Barbosa JW, Kassuha DE, Mancha-Agresti P. Cell-free supernatant of probiotic bacteria exerted antibiofilm and antibacterial activities against Pseudomonas aeruginosa: A novel biotic therapy. Front Pharmacol 2023; 14:1152588. [PMID: 37397469 PMCID: PMC10311102 DOI: 10.3389/fphar.2023.1152588] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 05/22/2023] [Indexed: 07/04/2023] Open
Abstract
Aim: This study aims to verify the antibacterial and antibiofilm action of cell-free spent medium (CFSM) from four lactic acid bacteria with potential probiotic characteristics (Lactiplantibacillus plantarum, Lactobacillus acidophilus, Lactobacillus johnsonii, and Lactobacillus delbrueckii) against two Pseudomonas aeruginosa strains. Main methods: The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of the CFSM, antibacterial activity by analysing the formation of inhibition zones, and inhibition of planktonic cultures were determined. Whether an increase in the concentration of CFSM influenced the growth of pathogenic strains and the anti-adhesive activity of the CFSM in biofilm formation (crystal violet and MTT assays) were determined, which were all corroborated by using scanning electron microscopy. Key findings: The relationship between the MIC and MBC values showed a bactericidal or bacteriostatic effect for all the cell-free spent media (CFSMs) tested for P. aeruginosa 9027™ and 27853™ strains. The CFSM supplemental doses of 18 or 22%, 20 or 22%, 46 or 48%, and 50 or 54% of L. acidophilus, L. delbrueckii, L. plantarum, and L. johnsonii, respectively, could completely inhibit the growth of both pathogen strains. The antibiofilm activity of the CFSM in three biofilm conditions (pre-coated, co-incubated, and preformed) demonstrated values ranging between 40% and 80% for biofilm inhibition, and similar results were observed for cell viability. Significance: This work provides strong evidence that the postbiotic derived from different Lactobacilli could be practical as an adjuvant therapy for reducing the use of antibiotics, being a good candidate to overcome the growing challenge of hospital infections due to this pathogen.
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Affiliation(s)
- Mariana Martins Drumond
- Centro Federal de Educação Tecnológica de Minas Gerais (CEFET/MG), Departamento de Ciências Biológicas, Belo Horizonte, Minas Gerais, Brazil
- Centro Federal de Educação Tecnológica de Minas Gerais (CEFET/MG), Programa de Pós Graduação em Engenharia de Materiais, Belo Horizonte, Minas Gerais, Brazil
| | - Ana Paula Tapia-Costa
- Instituto de Investigaciones en Ciencias Químicas, Facultad de Ciencias Químicas y Tecnológicas, Universidad Católica de Cuyo, San Juan, Argentina
| | - Elisabeth Neumann
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Álvaro Cantini Nunes
- Laboratório de Genética Molecular de Protozoários Parasitas, Departamento de Genética, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Jorge Wanderson Barbosa
- Centro Federal de Educação Tecnológica de Minas Gerais (CEFET/MG), Departamento de Engenharia de Materiais, Belo Horizonte, Minas Gerais, Brazil
| | - Diego E. Kassuha
- Instituto de Investigaciones en Ciencias Químicas, Facultad de Ciencias Químicas y Tecnológicas, Universidad Católica de Cuyo, San Juan, Argentina
| | - Pamela Mancha-Agresti
- Centro Federal de Educação Tecnológica de Minas Gerais (CEFET/MG), Programa de Pós Graduação em Engenharia de Materiais, Belo Horizonte, Minas Gerais, Brazil
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Bouabidi M, Salamone FL, Gadhi C, Bouamama H, Speciale A, Ginestra G, Pulvirenti L, Siracusa L, Nostro A, Cristani M. Efficacy of Two Moroccan Cistus Species Extracts against Acne Vulgaris: Phytochemical Profile, Antioxidant, Anti-Inflammatory and Antimicrobial Activities. Molecules 2023; 28:molecules28062797. [PMID: 36985768 PMCID: PMC10054591 DOI: 10.3390/molecules28062797] [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: 02/28/2023] [Revised: 03/13/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
BACKGROUND The genus Cistus L. (Cistaceae) includes several medicinal plants growing wild in the Moroccan area. Acne vulgaris (AV) is a chronic skin disorder treated with topical and systemic therapies that often lead to several side effects in addition to the development of antimicrobial resistance. Our study aimed to investigate the bioactivity of extracts of two Moroccan Cistus species, Cistus laurifolius L. and Cistus salviifolius L., in view of their use as potential coadjuvants in the treatment of mild acne vulgaris. METHODS Targeted phytochemical profiles obtained by HPLC-DAD and HPLC-ESI/MS analyses and biological activities ascertained by several antioxidants in vitro chemical and cell-based assays of the leaf extracts. Moreover, antimicrobial activity against Gram-positive and Gram-negative bacteria, and Candida albicans was evaluated. RESULTS Analyses revealed the presence of several polyphenols in the studied extracts, mainly flavonoids and tannins. Cistus laurifolius L. and Cistus salviifolius L. possessed good biological properties and all extracts showed antibacterial activity, particularly against Staphylococcus aureus, S. epidermidis, and Propionibacterium acnes, identified as the main acne-causing bacteria. CONCLUSION The results suggest that examined extracts are promising agents worthy of further studies to develop coadjuvants/natural remedies for mild acne treatment.
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Affiliation(s)
- Maryem Bouabidi
- Laboratory of Sustainable Development and Health Research (LRDDS), Faculty of Sciences and Technology, Cadi Ayyad University, 549 Bd Abdelkrim Al Khattabi, Marrakesh 40000, Morocco
| | - Federica Lina Salamone
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Chemseddoha Gadhi
- Laboratory of Agri-Food, Biotechnology and Valorization of Plant Bioresources, Faculty of Sciences Semlalia, Cadi Ayyad University, Bd. Prince My Abdellah, B.P. 2390, Marrakesh 40000, Morocco
| | - Hafida Bouamama
- Laboratory of Sustainable Development and Health Research (LRDDS), Faculty of Sciences and Technology, Cadi Ayyad University, 549 Bd Abdelkrim Al Khattabi, Marrakesh 40000, Morocco
| | - Antonio Speciale
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Giovanna Ginestra
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Luana Pulvirenti
- Istituto di Chimica Biomolecolare del Consiglio Nazionale delle Ricerche (ICB-CNR), Via Paolo Gaifami, 18, 95126 Catania, Italy
| | - Laura Siracusa
- Istituto di Chimica Biomolecolare del Consiglio Nazionale delle Ricerche (ICB-CNR), Via Paolo Gaifami, 18, 95126 Catania, Italy
| | - Antonia Nostro
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno D'Alcontres 31, 98166 Messina, Italy
| | - Mariateresa Cristani
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Viale F. Stagno D'Alcontres 31, 98166 Messina, Italy
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22
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Emam SH, Hassan RA, Osman EO, Hamed MIA, Abdou AM, Kandil MM, Elbaz EM, Mikhail DS. Coumarin derivatives with potential anticancer and antibacterial activity: Design, synthesis, VEGFR-2 and DNA gyrase inhibition, and in silico studies. Drug Dev Res 2023; 84:433-457. [PMID: 36779381 DOI: 10.1002/ddr.22037] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 01/05/2023] [Accepted: 01/13/2023] [Indexed: 02/14/2023]
Abstract
A series of coumarin derivatives were designed, synthesized, and evaluated for their antiproliferative activity. Compound 3e exhibited significant antiproliferative activity and was further evaluated at five doses at the National Cancer Institute. It effectively inhibited vascular endothelial growth factor receptor-2 (VEGFR-2) with an IC50 value of 0.082 ± 0.004 µM compared with sorafenib. While compound 3e significantly downregulated total VEGFR-2 and its phosphorylation, it markedly reduced the HUVEC's migratory potential, resulting in a significant disruption in wound healing. Furthermore, compound 3e caused a 22.51-fold increment in total apoptotic level in leukemia cell line HL-60(TB) and a 6.91-fold increase in the caspase-3 level. Compound 3e also caused cell cycle arrest, mostly at the G1/S phase. Antibacterial activity was evaluated against Gram-positive and Gram-negative bacterial strains. Compound 3b was the most active derivative, with the same minimum inhibitory concentration and minimum bactericidal concentration value of 128 μg/mL against K. pneumonia and high stability in mammalian plasma. Moreover, compounds 3b and 3f inhibited Gram-negative DNA gyrase with IC50 = 0.73 ± 0.05 and 1.13 ± 0.07 µM, respectively, compared to novobiocin with an IC50 value of 0.17 ± 0.02 µM. The binding affinity and pattern of derivative 3e toward the VEGFR-2 active site and compounds 3a-c and 3f in the DNA gyrase active site were evaluated using molecular modeling. Overall, ADME studies of the synthesized coumarin derivatives displayed promising pharmacokinetic properties.
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Affiliation(s)
- Soha H Emam
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Rasha A Hassan
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Eman O Osman
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Mohammed I A Hamed
- Department of Organic and Medicinal Chemistry, Faculty of Pharmacy, Fayoum University, Fayoum, Egypt
| | - Amr M Abdou
- Department of Microbiology and Immunology, National Research Centre, Dokki, Giza, Egypt
| | - Mai M Kandil
- Department of Microbiology and Immunology, National Research Centre, Dokki, Giza, Egypt
| | - Eman Maher Elbaz
- Department of Biochemistry, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Demiana S Mikhail
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Cairo University, Cairo, Egypt
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23
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Fernandez-Soto P, Celi D, Tejera E, Alvarez-Suarez JM, Machado A. Cinnamomum sp. and Pelargonium odoratissimum as the Main Contributors to the Antibacterial Activity of the Medicinal Drink Horchata: A Study Based on the Antibacterial and Chemical Analysis of 21 Plants. Molecules 2023; 28:693. [PMID: 36677749 PMCID: PMC9862262 DOI: 10.3390/molecules28020693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/28/2022] [Accepted: 01/04/2023] [Indexed: 01/13/2023] Open
Abstract
Horchata, a herbal infusion drink from Ecuador containing a mixture of medicinal plants, has been reported to exhibit anti-inflammatory, analgesic, diuretic, and antioxidant activity. The antibacterial activity of each of the plants contained in the horchata mixture has not been fully evaluated. Thus, in this study, we analysed the antibacterial activity of 21 plants used in horchata, collected from the Ecuadorian Andes region, against bacterial strains of clinical importance. The methanolic extract of Cinnamomum sp. showed minimal inhibitory concentration (MIC) values of 250 µg/mL against Staphylococcus aureus ATCC25923 and Methicillin-resistant S. aureus (MRSA), while Pelargonium odoratissimum exhibited a MIC value of 500 µg/mL towards S. aureus ATCC25923. The high-performance liquid chromatography-diode array detector-tandem mass spectrometry (HPLC-DAD-MS/MS) analyses identified in Cinnamomum sp. epicatechin tannins, cinnamaldehyde, and prehelminthosporol molecules, whereas in P. odoratissimum, gallocatechin and epigallocatechin tannins, some flavonoids, and gallic acid and derivatives were identified. Finally, Cinnamomum sp. and P. odoratissimum showed partial inhibition of biofilm formation of S. aureus ATCC25923 and MRSA. Overall, our findings revealed which of the plants used in horchata are responsible for the antibacterial activity attributed to this herbal drink and exhibit the potential for Cinnamomum sp. and P. odoratissimum secondary metabolites to be explored as scaffolds in drug development.
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Affiliation(s)
- Paulina Fernandez-Soto
- Facultad de Ciencias de la Salud, Carrera de Enfermería, Grupo de Bio-Quimioinformática, Universidad de Las Américas (UDLA), Quito 170125, Ecuador
| | - Diana Celi
- Facultad de Ingeniería y Ciencias Aplicadas, Carrera de Ingeniería Agroindustrial, Universidad de Las Américas (UDLA), Quito 170125, Ecuador
| | - Eduardo Tejera
- Facultad de Ingeniería y Ciencias Agropecuarias Aplicadas, Grupo de Bio-Quimioinformática, Universidad de Las Américas (UDLA), Quito 170125, Ecuador
| | - José Miguel Alvarez-Suarez
- Colegio de Ciencias e Ingenierías, Departamento de Ingeniería en Alimentos, Universidad San Francisco de Quito (USFQ), Quito 170901, Ecuador
| | - António Machado
- Colegio de Ciencias Biológicas y Ambientales (COCIBA), Instituto de Microbiología, Laboratorio de Bacteriología, Universidad San Francisco de Quito (USFQ), Quito 170901, Ecuador
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24
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Abubshait SA, Abubshait HA, Almalih R, Gomaa MS, Nawaz M, Ababutain IM, Alghamdi AI. Microwave‐Assisted Synthesis of Phthalazinone Derivatives with Biological Activity and
In Silico
Antiproliferative Studies. ChemistrySelect 2022. [DOI: 10.1002/slct.202203925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Samar A. Abubshait
- Department of Chemistry, College of Science Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
- Basic and Applied Scientific Research Center Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
| | - Haya A. Abubshait
- Department of Basic Sciences Department Deanship of Preparatory Year and Supporting Studies Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
| | - Rasha Almalih
- Department of Chemistry, College of Science Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
- Basic and Applied Scientific Research Center Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
| | - Mohamed S. Gomaa
- Department of Pharmaceutical Chemistry College of Clinical Pharmacy Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
| | - Muhammad Nawaz
- Department of Nano-Medicine Research Institute for Research and Medical Consultations (IRMC) Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
| | - Ibtisam M. Ababutain
- Department of Biology, College of Science Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
- Basic and Applied Scientific Research Center Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
| | - Azzah I. Alghamdi
- Department of Biology, College of Science Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
- Basic and Applied Scientific Research Center Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
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25
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Aboagye CI, Ampomah GB, Mensah JO, Mensah CN, Nartey D, Gasu EN, Borquaye LS. N-Benzylimidazoles as Potential Antimicrobial and Antibiofilm Agents – Syntheses, Bioactivity and Molecular Docking Studies. SCIENTIFIC AFRICAN 2022. [DOI: 10.1016/j.sciaf.2022.e01529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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26
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Pernas-Pleite C, Conejo-Martínez AM, Marín I, Abad JP. Green Extracellular Synthesis of Silver Nanoparticles by Pseudomonas alloputida, Their Growth and Biofilm-Formation Inhibitory Activities and Synergic Behavior with Three Classical Antibiotics. Molecules 2022; 27:7589. [PMID: 36364415 PMCID: PMC9656067 DOI: 10.3390/molecules27217589] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/26/2023] Open
Abstract
Bacterial resistance to antibiotics is on the rise and hinders the fight against bacterial infections, which are expected to cause millions of deaths by 2050. New antibiotics are difficult to find, so alternatives are needed. One could be metal-based drugs, such as silver nanoparticles (AgNPs). In general, chemical methods for AgNPs' production are potentially toxic, and the physical ones expensive, while green approaches are not. In this paper, we present the green synthesis of AgNPs using two Pseudomonas alloputida B003 UAM culture broths, sampled from their exponential and stationary growth phases. AgNPs were physicochemically characterized by transmission electron microscopy (TEM), total reflection X-ray fluorescence (TXRF), infrared spectroscopy (FTIR), dynamic light scattering (DLS), and X-ray diffraction (XRD), showing differential characteristics depending on the synthesis method used. Antibacterial activity was tested in three assays, and we compared the growth and biofilm-formation inhibition of six test bacteria: Bacillus subtilis, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Staphylococcus aureus, and Staphylococcus epidermidis. We also monitored nanoparticles' synergic behavior through the growth inhibition of E. coli and S. aureus by three classical antibiotics: ampicillin, nalidixic acid, and streptomycin. The results indicate that very good AgNP activity was obtained with particularly low MICs for the three tested strains of P. aeruginosa. A good synergistic effect on streptomycin activity was observed for all the nanoparticles. For ampicillin, a synergic effect was detected only against S. aureus. ROS production was found to be related to the AgNPs' antibacterial activity.
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Affiliation(s)
| | | | - Irma Marín
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
| | - José P. Abad
- Department of Molecular Biology, Faculty of Sciences, Biology Building, Autonomous University of Madrid, Cantoblanco, 28049 Madrid, Spain
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27
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Guevara-Terán M, Padilla-Arias K, Beltrán-Novoa A, González-Paramás AM, Giampieri F, Battino M, Vásquez-Castillo W, Fernandez-Soto P, Tejera E, Alvarez-Suarez JM. Influence of Altitudes and Development Stages on the Chemical Composition, Antioxidant, and Antimicrobial Capacity of the Wild Andean Blueberry ( Vaccinium floribundum Kunth). Molecules 2022; 27:7525. [PMID: 36364359 PMCID: PMC9657399 DOI: 10.3390/molecules27217525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 11/01/2022] [Accepted: 11/02/2022] [Indexed: 11/07/2023] Open
Abstract
The chemical composition and biological capacities of berries depend on environmental parameters, maturity, and location. The Andean blueberry (Vaccinium floribundum Kunth), also known as mortiño, presents a unique combination of several phytochemicals, which play a synergistic role in its characterization as a functional food. We aimed to expose the possible variations that exist in the profile of the phenolic compounds as well as the antioxidant and antimicrobial capacity of the wild Andean blueberry with respect to three ripeness stages and two different altitudes. We found that polyphenols are the predominant compounds in the berry during the early ripeness stage and are the main bioactive compounds that give rise to the antioxidant capacity and inhibition effect on the growth of gram-positive and gram-negative bacteria. Moreover, the accumulation of ascorbic acid, free amino acids, and anthocyanins increases as the ripening process progresses, and they were the main bioactive compounds in the ripe berry. The latter compounds influence the production of the typical bluish or reddish coloration of ripe blueberries. In addition, it was determined that environmental conditions at high altitudes could have a positive influence in all cases. Overall, our data provide evidence regarding the high functional value of the wild Andean blueberry.
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Affiliation(s)
- Mabel Guevara-Terán
- Grupo de Bioquimioinformática, Universidad de Las Américas, Quito 170125, Ecuador
- Grupo de Investigación en Polifenoles, Campus Miguel de Unamuno, Universidad de Salamanca, 37008 Salamanca, Spain
| | | | - Andrea Beltrán-Novoa
- Departamento de Química Analítica, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko, Unibertsitatea (UPV/EHU), 48940 Bilbao, Spain
| | - Ana M González-Paramás
- Grupo de Investigación en Polifenoles, Campus Miguel de Unamuno, Universidad de Salamanca, 37008 Salamanca, Spain
| | - Francesca Giampieri
- Research Group on Food, Nutritional Biochemistry and Health, Universidad Europea del Atlántico, 39011 Santander, Spain
- Department of Biochemistry, Faculty of Sciences, King Abdulaziz University, Jeddah 2254, Saudi Arabia
| | - Maurizio Battino
- Research Group on Food, Nutritional Biochemistry and Health, Universidad Europea del Atlántico, 39011 Santander, Spain
- Department of Clinical Sciences, Università Politecnica delle Marche, 60121 Ancona, Italy
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang 212013, China
| | | | | | - Eduardo Tejera
- Grupo de Bioquimioinformática, Universidad de Las Américas, Quito 170125, Ecuador
| | - José M Alvarez-Suarez
- Departamento de Ingeniería en Alimentos, Colegio de Ciencias e Ingenierías, Universidad San Francisco de Quito, Quito 170901, Ecuador
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Jubair N, R. M, Fatima A, Mahdi YK, Abdullah NH. Evaluation of Catechin Synergistic and Antibacterial Efficacy on Biofilm Formation and acrA Gene Expression of Uropathogenic E. coli Clinical Isolates. Antibiotics (Basel) 2022; 11:1223. [PMID: 36140002 PMCID: PMC9495025 DOI: 10.3390/antibiotics11091223] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/29/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022] Open
Abstract
Uropathogenic Escherichia coli has a propensity to build biofilms to resist host defense and antimicrobials. Recurrent urinary tract infection (UTI) caused by multidrug-resistant, biofilm-forming E. coli is a significant public health problem. Consequently, searching for alternative medications has become essential. This study was undertaken to investigate the antibacterial, synergistic, and antibiofilm activities of catechin isolated from Canarium patentinervium Miq. against three E. coli ATCC reference strains (ATCC 25922, ATCC 8739, and ATCC 43895) and fifteen clinical isolates collected from UTI patients in Baghdad, Iraq. In addition, the expression of the biofilm-related gene, acrA, was evaluated with and without catechin treatment. Molecular docking was performed to evaluate the binding mode between catechin and the target protein using Autodock Vina 1.2.0 software. Catechin demonstrated significant bactericidal activity with a minimum inhibitory concentration (MIC) range of 1-2 mg/mL and a minimum bactericidal concentration (MBC) range of 2-4 mg/mL and strong synergy when combined with tetracycline at the MBC value. In addition, catechin substantially reduced E. coli biofilm by downregulating the acrA gene with a reduction percent ≥ 60%. In silico analysis revealed that catechin bound with high affinity (∆G = -8.2 kcal/mol) to AcrB protein (PDB-ID: 5ENT), one of the key AcrAB-TolC efflux pump proteins suggesting that catechin might inhibit the acrA gene indirectly by docking at the active site of AcrB protein.
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Affiliation(s)
- Najwan Jubair
- Faculty of Pharmaceutical Sciences, UCSI University, Kuala Lumpur 56000, Malaysia
| | - Mogana R.
- Faculty of Pharmaceutical Sciences, UCSI University, Kuala Lumpur 56000, Malaysia
| | - Ayesha Fatima
- Beykoz Institute of Life Sciences and Biotechnology, Bezmialem Vakif University, 34820 Istanbul, Turkey
| | - Yasir K. Mahdi
- Faculty of Pharmaceutical Sciences, UCSI University, Kuala Lumpur 56000, Malaysia
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Preliminary Study on Phytochemical Constituents and Biological Activities of Essential Oil from Myriactis nepalensis Less. Molecules 2022; 27:molecules27144631. [PMID: 35889501 PMCID: PMC9324352 DOI: 10.3390/molecules27144631] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/16/2022] [Accepted: 07/18/2022] [Indexed: 11/17/2022] Open
Abstract
In response to the need for novel therapeutic strategies to combat the development of microbial resistance, plant essential oils may represent a promising alternative source. This study set out to characterize the chemical composition and assess the antibacterial potential of Myriactis nepalensis Less. essential oil (MNEO). Essential oil isolated from M. nepalensis by hydrodistillation was analyzed using a GC–MS technique. The antibacterial properties of MNEO alone and combined with antibiotics (chloramphenicol and streptomycin) were tested via the disc diffusion, microbroth dilution, and checkerboard methods. MNEO was represented by oxygenated sesquiterpenes (60.3%) and sesquiterpene hydrocarbons (28.6%), with caryophyllene oxide, spathulenol, humulene epoxide II, β-elemene, neointermedeol, and β-caryophyllene as the main compounds. MNEO exhibited a strong antibacterial effect against Gram-positive bacteria, with MIC and MBC values of 0.039 mg/mL and 0.039–0.156 mg/mL, respectively, and synergistic effects were observed in both combinations with chloramphenicol and streptomycin. Furthermore, the antibiofilm and cytotoxic activities of MNEO were also evaluated. The crystal violet assay was used for quantification of Staphylococcus aureus biofilm formation, and an MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) assay was conducted to determine cell viability. The results revealed MNEO could dose-dependently inhibit Staphylococcus aureus biofilm formation and possessed potential cytotoxic on both normal and cancer cells (IC50 values from 13.13 ± 1.90 to 35.22 ± 8.36 μg/mL). Overall, the results indicate that MNEO may have promising applications in the field of bacterial infections.
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Vitamin K3 inhibits FtsZ assembly, disrupts the Z-ring in Streptococcus pneumoniae, and displays anti-pneumococcal activity. Biochem J 2022; 479:1543-1558. [PMID: 35789252 DOI: 10.1042/bcj20220077] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 06/30/2022] [Accepted: 07/05/2022] [Indexed: 11/17/2022]
Abstract
The respiratory pathogen, Streptococcus pneumoniae has acquired multiple-drug resistance over the years. An attractive strategy to combat pneumococcal infection is to target cell division to inhibit the proliferation of S. pneumoniae. This work presents Vitamin K3 as a potential anti-pneumococcal drug that targets FtsZ, the master coordinator of bacterial cell division. Vitamin K3 strongly inhibited S. pneumoniae proliferation with a Minimum Inhibitory Concentration (MIC) and a Minimum Bactericidal Concentration (MBC) of 6 μg/mL. Vitamin K3 disrupted the Z-ring localization in both S. pneumoniae and Bacillus subtilis within 30 minutes of treatment, while the membrane integrity and nucleoid segregation remain unchanged. Several complementary experiments showed that Vitamin K3 inhibits the assembly of purified S. pneumoniae FtsZ (SpnFtsZ) and induces conformational changes in the protein. Interestingly, Vitamin K3 interfered with GTP-binding onto FtsZ and increased the GTPase activity of FtsZ polymers. The intrinsic tryptophan fluorescence of SpnFtsZ revealed that Vitamin K3 delays the nucleation of FtsZ polymers and reduces the rate of polymerization. In the presence of a non-hydrolyzable analog of GTP, Vitamin K3 did not show inhibition of FtsZ polymerization. These results indicated that Vitamin K3 induces conformational changes in FtsZ that increase GTP hydrolysis and thereby, destabilize the FtsZ polymers. Together, our data provide evidence that Vitamin K3 derives its potent anti-pneumococcal activity by inhibiting FtsZ assembly.
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Amer SA, Abd El‐Rahman HSM. Anti‐shigellosis activity of the aqueous extract of garlic, clove and fenugreek. J Food Saf 2022; 42. [DOI: 10.1111/jfs.12978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 03/21/2022] [Indexed: 09/02/2023]
Abstract
AbstractShigellosis causes severe diarrhea and, in some cases, death in children. In this study, we investigated the in vitro and in vivo anti‐shigellosis efficacy of some aqueous herbal extracts or their chosen mixtures, including fenugreek seed, black seed, clove, garlic, and ginger. The antibacterial potential was assessed by well diffusion and microdilution assays. The extracts' minimum inhibitory concentrations ranged from 0.39 to 12.5 mg/ml. The water extract of garlic and combinations of garlic with either fenugreek or clove extracts had the highest antibacterial efficacy, hence these extracts were chosen for the in vivo investigation. Rats were given a Shigella dysenteriae inoculum and then administrated two doses (100 and 200 mg/kg bw) of the selected herbal extracts or the antibiotic ciprofloxacin (20 mg/kg bw) to treat Shigellosis in vivo. The results showed that garlic and clove extract mixtures (G6, 200 mg/kg bw), garlic and fenugreek mixtures (G7 and G8, 100 and 200 mg/kg bw), and ciprofloxacin group (G9, 20 mg/kg bw) had the best anti‐Shigellosis efficacy. G7 (garlic and fenugreek mixtures (100 mg/kg bw) outperformed almost all other groups evaluated. This group had lower defecation frequency, lower stool‐Shigella loudness, restored body weight, recovered hematological, and liver and kidney functions, besides exhibited no anatomical alterations in the colon tissue that were comparable to the uninfected group. As a result, in the treatment of Shigella, this extract combination may be suggested as a viable therapeutic alternative to antibiotics.
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Affiliation(s)
- Sara Adel Amer
- Agricultural Research Centre (ARC) Food Technology Research Institute (FTRI) Giza Egypt
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Evaluating the Effectiveness of Hospital Antiseptics on Multidrug-Resistant Acinetobacter baumannii: Understanding the Relationship between Microbicide and Antibiotic Resistance. Antibiotics (Basel) 2022; 11:antibiotics11050614. [PMID: 35625258 PMCID: PMC9137960 DOI: 10.3390/antibiotics11050614] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/28/2022] [Accepted: 04/30/2022] [Indexed: 12/22/2022] Open
Abstract
Acinetobacter baumannii hospital infections are difficult to treat due to the rapid emergence of multidrug-resistant (MDR) strains. In addition, A. baumannii can survive in numerous adverse environments, including in the presence of common hospital antiseptics. We hypothesized that in addition to accumulating drug resistance determinants, MDR A. baumannii strains also accumulate mutations that allow for greater microbicide tolerance when compared to pan-susceptible (PS) strains. To test this hypothesis, we compared the survival of five MDR and five PS patient isolates when exposed to bleach, ethanol, quaternary ammonium compounds, chlorhexidine gluconate, and povidone. We evaluated bacteria in a free-living planktonic state and under biofilm conditions. Each disinfectant eliminated 99.9% of planktonic bacteria, but this was not the case for bacterial biofilms. Next, we characterized strains for the presence of the known microbicide-resistance genes cepA, qacEΔ1, qacE, and qacA. MDR strains did not survive more than PS strains in the presence of microbicides, but microbicide-resistant strains had higher survival rates under some conditions. Interestingly, the PS strains were more likely to possess microbicide-resistance genes. Microbicide resistance remains an important topic in healthcare and may be independent of antimicrobial resistance. Hospitals should consider stricter isolation precautions that take pan-susceptible strains into account.
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Darnowski MG, Lanosky TD, Labana P, Brazeau-Henrie JT, Calvert ND, Dornan MH, Natola C, Paquette AR, Shuhendler AJ, Boddy CN. Armeniaspirol analogues with more potent Gram-positive antibiotic activity show enhanced inhibition of the ATP-dependent proteases ClpXP and ClpYQ. RSC Med Chem 2022; 13:436-444. [PMID: 35647545 PMCID: PMC9020616 DOI: 10.1039/d1md00355k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 02/07/2022] [Indexed: 11/21/2022] Open
Abstract
Antibiotics with fundamentally new mechanisms of action such as the armeniaspirols, which target the ATP-dependent proteases ClpXP and ClpYQ, must be developed to combat antimicrobial resistance. While the mechanism of action of armeniaspirol against Gram-positive bacteria is understood, little is known about the structure-activity relationship for its antibiotic activity. Based on the preliminary data showing that modifications of armeniaspirol's N-methyl group increased antibiotic potency, we probed the structure-activity relationship of N-alkyl armeniaspirol derivatives. A series of focused derivatives were synthesized and evaluated for antibiotic activity against clinically relevant pathogens including methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus. Replacement of the N-methyl with N-hexyl, various N-benzyl, and N-phenethyl substituents led to substantial increases in antibiotic activity and potency for inhibition of both ClpYQ and ClpXP. Docking studies identified binding models for ClpXP and ClpYQ that were consistent with the inhibition data. This work confirms the role of ClpXP and ClpYQ in the mechanism of action of armeniaspirol and provides important lead compounds for further antibiotic development.
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Affiliation(s)
- Michael G. Darnowski
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Taylor D. Lanosky
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Puneet Labana
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Jordan T. Brazeau-Henrie
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Nicholas D. Calvert
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Mark H. Dornan
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Claudia Natola
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - André R. Paquette
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Adam J. Shuhendler
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
| | - Christopher N. Boddy
- Department of Chemistry and Biomolecular Sciences, University of OttawaOttawaONK1N 6N5 Canadacboddy!uottawa.ca
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Synergistic Antibacterial and Anti-inflammatory Activities of Ocimum tenuiflorum Ethanolic Extract against Major Bacterial Mastitis Pathogens. Antibiotics (Basel) 2022; 11:antibiotics11040510. [PMID: 35453261 PMCID: PMC9029753 DOI: 10.3390/antibiotics11040510] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 04/08/2022] [Accepted: 04/10/2022] [Indexed: 01/27/2023] Open
Abstract
Mastitis is the most prevalent global illness affecting dairy cows. This bacterial infection damages and inflames the udder tissues. Several plant extracts have demonstrated synergistic antibacterial activities with standard drugs in mastitis treatment. Scant information exists on Ocimum tenuiflorum L. This study evaluated the antibacterial activity of O. tenuiflorum extract and its interaction with antibacterial drugs against common mastitis pathogens including Staphylococcus aureus, coagulase-negative Staphylococci (CNS), Streptococcus agalactiae, and Escherichia coli. Anti-inflammatory activities in LPS-stimulated RAW264.7 macrophage cells were also studied. The O. tenuiflorum extract exhibited antibacterial activities against S. aureus, CNS, and S. agalactiae with minimum inhibitory concentration (MIC) ranging from 3.9 to 31.2 µg/mL and minimum bactericidal concentration (MBC) ranging from 15.6 to 500 µg/mL. Combinations of O. tenuiflorum with penicillin or amoxicillin-clavulanic acid showed synergistic effects against all tested strains but an additive effect with cefazolin and gentamicin. Pretreatment of the extract significantly decreased the expression of inflammatory molecules (IL-6, TNF-α, IL-1β, iNOS, COX-2, and PGE2) generated by LPS in macrophages. Results suggested O. tenuiflorum effectiveness against various Gram-positive mastitis bacteria, with the potential to reduce antibacterial doses and combat inflammation.
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tRNA fMet Inactivating Mycobacterium tuberculosis VapBC Toxin-Antitoxin Systems as Therapeutic Targets. Antimicrob Agents Chemother 2022; 66:e0189621. [PMID: 35404073 DOI: 10.1128/aac.01896-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Mycobacterium tuberculosis genome contains an abundance of toxin-antitoxin (TA) systems, 50 of which belong to the VapBC family. The activity of VapC toxins is controlled by dynamic association with their cognate antitoxins-the toxin is inactive when complexed with VapB antitoxin but active when freed. Here, we determined the cellular target of two phylogenetically related VapC toxins and demonstrate how their properties can be harnessed for drug development. First, we used a specialized RNA sequencing (RNA-seq) approach, 5' RNA-seq, to accurately identify the in vivo RNA target of M. tuberculosis VapC2 and VapC21 toxins. Both toxins exclusively disable initiator tRNAfMet through cleavage at a single, identical site within their anticodon loop. Consistent with the essential role and global requirement for initiator tRNAfMet in bacteria, expression of each VapC toxin resulted in potent translation inhibition followed by growth arrest and cell death. Guided by previous structural studies, we then mutated two conserved amino acids in the antitoxin (WR→AA) that resided in the toxin-antitoxin interface and were predicted to inhibit toxin activity. Both mutants were markedly less efficient in rescuing growth over time, suggesting that screens for high-affinity small-molecule inhibitors against this or other crucial VapB-VapC interaction sites could drive constitutive inactivation of tRNAfMet by these VapC toxins. Collectively, the properties of the VapBC2 and VapBC21 TA systems provide a framework for development of bactericidal antitubercular agents with high specificity for M. tuberculosis cells.
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Sarecycline Demonstrated Reduced Activity Compared to Minocycline against Microbial Species Representing Human Gastrointestinal Microbiota. Antibiotics (Basel) 2022; 11:antibiotics11030324. [PMID: 35326788 PMCID: PMC8944611 DOI: 10.3390/antibiotics11030324] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 02/24/2022] [Accepted: 02/25/2022] [Indexed: 02/04/2023] Open
Abstract
Prolonged use of broad-spectrum tetracycline antibiotics such as minocycline and doxycycline may significantly alter the gut and skin microbiome leading to dysbiosis. Sarecycline, a narrow-spectrum tetracycline-class antibiotic used for acne treatment, is hypothesized to have minimal impact on the gastrointestinal tract microbiota. We evaluated the effect of sarecycline compared to minocycline against a panel of microorganisms that reflect the diversity of the gut microbiome using in vitro minimum inhibitory concentration (MIC) and time-kill kinetic assays. Compared to minocycline, sarecycline showed less antimicrobial activity indicated by higher MIC against 10 of 12 isolates from the Bacteroidetes phylum, three out of four isolates from Actinobacteria phylum, and five of seven isolates from the Firmicutes phylum, with significantly higher MIC values against Propionibacterium freudenreichii (≥3 dilutions). In time-kill assays, sarecycline demonstrated significantly less activity against Escherichia coli compared to minocycline at all time-points (p < 0.05). Moreover, sarecycline was significantly less effective in inhibiting Candida tropicalis compared to minocycline following 20- and 22-h exposure. Furthermore, sarecycline showed significantly less activity against Lactobacillus paracasei (recently renamed as Lacticaseibacillus paracasei subsp. paracasei) (p = 0.002) and Bifidobacterium adolescentis at 48 h (p = 0.042), when compared to minocycline. Overall, sarecycline demonstrated reduced antimicrobial activity against 79% of the tested gut microorganisms, suggesting that it is less disruptive to gut microbiota compared with minocycline. Further in vivo testing is warranted.
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Khan NA, Kaur N, Owens P, Thomas OP, Boyd A. Bis-Indole Alkaloids Isolated from the Sponge Spongosorites calcicola Disrupt Cell Membranes of MRSA. Int J Mol Sci 2022; 23:ijms23041991. [PMID: 35216106 PMCID: PMC8874442 DOI: 10.3390/ijms23041991] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/06/2022] [Accepted: 02/08/2022] [Indexed: 02/01/2023] Open
Abstract
Antimicrobial resistance (AMR) is a global health challenge with methicillin resistant Staphylococcus aureus (MRSA), a leading cause of nosocomial infection. In the search for novel antibiotics, marine sponges have become model organisms as they produce diverse bioactive compounds. We investigated and compared the antibacterial potential of 3 bis-indole alkaloids—bromodeoxytopsentin, bromotopsentin and spongotine A—isolated from the Northeastern Atlantic sponge Spongosorites calcicola. Antimicrobial activity was determined by MIC and time-kill assays. The mechanism of action of bis-indoles was assessed using bacterial cytological profiling via fluorescence microscopy. Finally, we investigated the ability of bis-indole alkaloids to decrease the cytotoxicity of pathogens upon co-incubation with HeLa cells through the measurement of mammalian cell lysis. The bis-indoles were bactericidal to clinically relevant Gram-positive pathogens including MRSA and to the Gram-negative gastroenteric pathogen Vibrio parahaemolyticus. Furthermore, the alkaloids were synergistic in combination with conventional antibiotics. Antimicrobial activity of the bis-indole alkaloids was due to rapid disruption and permeabilization of the bacterial cell membrane. Significantly, the bis-indoles reduced pathogen cytotoxicity toward mammalian cells, indicating their ability to prevent bacterial virulence. In conclusion, sponge bis-indole alkaloids are membrane-permeabilizing agents that represent good antibiotic candidates because of their potency against Gram-positive and Gram-negative bacterial pathogens.
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Affiliation(s)
- Neyaz A. Khan
- Discipline of Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland;
| | - Navdeep Kaur
- Discipline of Chemistry, School of Biological and Chemical Science and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland; (N.K.); (O.P.T.)
| | - Peter Owens
- Centre for Microscopy and Imaging, National University of Ireland, Galway, H91 TK33 Galway, Ireland;
| | - Olivier P. Thomas
- Discipline of Chemistry, School of Biological and Chemical Science and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland; (N.K.); (O.P.T.)
| | - Aoife Boyd
- Discipline of Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland;
- Correspondence: ; Tel.: +353-(0)91-492404
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ALTUN MEHZAT, YAPICI BINNURMERICLI. Determination of chemical compositions and antibacterial effects of selected essential oils against human pathogenic strains. AN ACAD BRAS CIENC 2022; 94:e20210074. [DOI: 10.1590/0001-3765202220210074] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 04/20/2021] [Indexed: 12/11/2022] Open
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Santos AM, Santos MM, Nascimento Júnior JAC, Brito JRLR, de Araújo Andrade T, Frank LA, Serafini MR. Mapping of New Pharmacological Alternatives in the Face of the Emergence of Antibiotic Resistance in COVID-19 Patents Treated for Opportunistic Respiratory Bacterial Pathogens. RECENT ADVANCES IN ANTI-INFECTIVE DRUG DISCOVERY 2022; 17:34-53. [PMID: 35593343 DOI: 10.2174/1574891x16666220518142347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 12/12/2021] [Accepted: 03/16/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND The increase in bacterial resistance against antibiotics is thought to be another type of pandemic after COVID-19. Emergency treatment based on antibiotics is a major influence in increasing this resistance. Bacteria, such as Klebsiella pneumoniae, are the most affected by the indiscriminate use of antibiotics, since they are resistant to most antibiotics currently available on the market. OBJECTIVE This review aimed to evaluate patents of new drugs and formulations, for the treatment of infections caused by Klebsiella pneumoniae. METHODS The present patent review was carried out through a specialized search database Espacenet. The selection was based on the criteria of patents published from 2010 to May 2021, in any language, and containing the keywords in title or abstract. Also, a research was performed on the PubMed database, using the inclusion criteria. RESULTS Twenty-two patents were selected for the analysis according to the aim of the study. The advance of new patents has been mostly observed in the World Intellectual Property Organization, China, and United States. The results showed that the main approach was the drug association, followed by drug carriers, new isolated products, and vaccines. CONCLUSION It has been observed that few studies use new drug alternatives for the treatment, probably due to the higher cost of the development and lack of investments. The effectiveness and safety of these therapies depend on the acceptance, the correct prescription, and rational use of medicines. Therefore, this review can further develop new treatments as alternatives against Klebsiella pneumoniae and pneumonia caused by it.
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Affiliation(s)
| | - Mariana Mendonça Santos
- Postgraduate Program in Health Sciences, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - José Adão Carvalho Nascimento Júnior
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | | | - Tatianny de Araújo Andrade
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - Luiza Abrahão Frank
- Department of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Mairim Russo Serafini
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
- Postgraduate Program in Health Sciences, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
- Postgraduate Program in Pharmaceutical Sciences, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
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Sornsenee P, Chatatikun M, Mitsuwan W, Kongpol K, Kooltheat N, Sohbenalee S, Pruksaphanrat S, Mudpan A, Romyasamit C. Lyophilized cell-free supernatants of Lactobacillus isolates exhibited antibiofilm, antioxidant, and reduces nitric oxide activity in lipopolysaccharide-stimulated RAW 264.7 cells. PeerJ 2021; 9:e12586. [PMID: 34909285 PMCID: PMC8641486 DOI: 10.7717/peerj.12586] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 11/11/2021] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Probiotics can release bioactive substances known as postbiotics, which can inhibit pathogenic microorganisms, improve immunomodulation, reduce antioxidant production, and modulate the gut microbiota. METHODS In this study, we evaluated the in vitro antimicrobial effects, antioxidant activity, and anti-inflammatory potential of 10 lyophilized cell-free supernatants (LCFS) of Lactobacillus isolates. LCFS was obtained via centrifugation and subsequent lyophilization of the supernatant collected from the culture medium ofeach isolate. The antibacterial and antibiofilm activities of the LCFS were determined using broth microdilution. The antioxidant potential was evaluated by measuring the total phenolic and flavonoid contents and 2,2-Diphennyl-1-picrylhydrazyl (DPPH) and 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation (ABTS+) radical scavenging activities. RESULTS All the isolates were able to inhibit the four tested pathogens. The isolates exhibited strong antibiofilm activity and eradicated the biofilms formed by Acinetobacter buamannii and Escherichia coli. All the prepared Lactobacillus LCFS contained phenols and flavonoids and exhibited antioxidant activities in the DPPH and ABTS+ radical scavenging assays. The MTT (3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide) assay revealed that LCFS was not cytotoxic to RAW 264.7 cells. In addition, the ten Lactobacillus LCFS decreased the production of nitric oxide. CONCLUSIONS All the isolates have beneficial properties. This research sheds light on the role of postbiotics in functional fermented foods and pharmaceutical products. Further research to elucidate the precise molecular mechanisms of action of probiotics is warranted.
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Affiliation(s)
- Phoomjai Sornsenee
- Department of Family and Preventive Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Moragot Chatatikun
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
- Center of Excellence Research for Meliodosis (CERM), Walailak University, Thasala, Nakhon Si Thammarat, Thailand
- Research Excellence Center for Innovation and Health Product, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
| | - Watcharapong Mitsuwan
- Research Center of Excellence in Innovation of Essential Oil, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
- One Health Research Center, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
- Akkhraratchakumari Veterinary College, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
| | - Kantapich Kongpol
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
- Research Excellence Center for Innovation and Health Product, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
| | - Nateelak Kooltheat
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
- Research Excellence Center for Innovation and Health Product, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
| | - Sasirat Sohbenalee
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
| | - Supawita Pruksaphanrat
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
| | - Amron Mudpan
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
| | - Chonticha Romyasamit
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
- Center of Excellence Research for Meliodosis (CERM), Walailak University, Thasala, Nakhon Si Thammarat, Thailand
- Research Center of Excellence in Innovation of Essential Oil, Walailak University, Thasala, Nakhon Si Thammarat, Thailand
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Pouofo Nguiam M, Njonte Wouamba SC, Longo F, Gounoue Kamkumo R, Donji Kenne Foweda L, Dzeufiet Djomeni PD, Lenta Ndjakou B, Sewald N, Fekam Boyom F, Kouam Fogue S, Dimo T. Antibacterial and antishigellosis activity of Xylopia staudtii (engl. & diels), Annonaceae. JOURNAL OF ETHNOPHARMACOLOGY 2021; 280:114406. [PMID: 34245833 DOI: 10.1016/j.jep.2021.114406] [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: 04/20/2021] [Revised: 06/20/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Xylopia staudtii is a medicinal plant which fruits are traditionally used in western Cameroon as a spice in the preparation of soups known for their abdominal cramp relieving properties. Often identified as Xylopia africana, its bark is used in the treatment of dysentery in Mont Cameroun localities. This plant could therefore contain active ingredients against intestinal pathogens, including Shigella spp, which are responsible of the deathly dysenteric diarrhoea. AIM OF THE STUDY This study aims to assess the efficacy of the hydroethanolic extract from Xylopia staudtii bark in immunodepressed mice infected with Shigella flexneri. MATERIALS AND METHODS Qualitative detection of compounds in the crude extract was done using UPLC-DAD-(HR) ESI-MS analysis in an attempt to link the activity to the chemical composition. The MIC and the MBC of the extract was determined using broth dilution method. Shigellosis was induced by intraperitoneal administration of Shigella flexneri to immunodepressed mice pretreated with streptomycin. These infected mice were then treated with the extract (100, 200 and 400 mg/kg), and reference substances (ciprofloxacin and saline). During the 9 days of treatment, animal morphology, fecal pathology and deaths were recorded. At the end of the treatment period, blood and organs were collected from any surviving animals for hematological, biochemical and histopathological analyses. RESULTS The extract was found to be significantly active, with a bactericidal effect against Shigella and a bacteriostatic effect against Escherichia coli. It was able to reduce and stop the faecal pathology caused by the infection in mice, as well as the rate of deaths which was brought to zero (0) in animal treated at 400 mg/kg. The bacteria load in faeces was reduced by 100% in animal treated at 400 mg/kg. Xylopia staudtii extract elicited anti-inflammatory properties by reducing MPO activity and Lcn2 intestinal level. It also prevents damages in the intestinal tissue and the shortening of colon which characterise Shigella infection. The serum level of ASAT, ALAT, bilirubin, urea and creatinine in animals treated with the extract was similar to those of normal animal used in the study. These activities of the plant may be due at least in part to the presence of ent-kauran type diterpens such as kaurenoic acid identified in the extract. CONCLUSION These findings support the usage of Xylopia staudtii as an antimicrobial against bacillary dysentery, making this plant a potential candidate for the formulation of an improved standardized traditional medicine.
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Affiliation(s)
- Michel Pouofo Nguiam
- Department of Animal Biology and Physiology, Faculty of Science, University of Yaounde I, P.O. Box, 812, Yaoundé, Cameroon; Department of Biological Sciences, Higher Teacher Training College, University of Yaoundé I, P.O. Box, 47, Yaoundé, Cameroon.
| | | | - Frida Longo
- Department of Biological Sciences, Higher Teacher Training College, University of Yaoundé I, P.O. Box, 47, Yaoundé, Cameroon.
| | - Raceline Gounoue Kamkumo
- Department of Animal Biology and Physiology, Faculty of Science, University of Yaounde I, P.O. Box, 812, Yaoundé, Cameroon; Department of Biochemistry, Faculty of Science, University of Yaoundé I, P.O. Box, 812, Yaoundé, Cameroon.
| | - Larissa Donji Kenne Foweda
- Department of Biological Sciences, Higher Teacher Training College, University of Yaoundé I, P.O. Box, 47, Yaoundé, Cameroon.
| | - Paul Desire Dzeufiet Djomeni
- Department of Animal Biology and Physiology, Faculty of Science, University of Yaounde I, P.O. Box, 812, Yaoundé, Cameroon.
| | - Bruno Lenta Ndjakou
- Department of Chemistry, Higher Teacher Training College, University of Yaoundé I, P.O. Box, 47, Yaoundé, Cameroon.
| | - Norbert Sewald
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501, Bielefeld, Germany.
| | - Fabrice Fekam Boyom
- Department of Biochemistry, Faculty of Science, University of Yaoundé I, P.O. Box, 812, Yaoundé, Cameroon.
| | - Simeon Kouam Fogue
- Department of Chemistry, Higher Teacher Training College, University of Yaoundé I, P.O. Box, 47, Yaoundé, Cameroon.
| | - Theophile Dimo
- Department of Animal Biology and Physiology, Faculty of Science, University of Yaounde I, P.O. Box, 812, Yaoundé, Cameroon.
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Antibacterial Activity and Phytochemical Screening of Garcinia pedunculata Roxb. ex Buch. - Ham. fruit extract by HPLC–ESI-MS. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2021. [DOI: 10.22207/jpam.15.4.42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Disc and well diffusion methods were used to test the antibacterial activity of methanol extract and ethanol extract of the selected ethnomedicinal plant viz. Garcinia pedunculata Roxb. ex Buch.-Ham. Both the methanol extract and ethanol extract were subjected to antibacterial activity assay against the six clinical isolates. Antibiotic sensitivity test of the test bacteria against standard antibiotics were also determined. All the bacterial pathogens (Staphylococcus aureus, Enterococcus faecalis, Enterobacter cloacae, Escherichia coli, Pseudomonas aeruginosa and Klebsiella pneumoniae) were exposed to the plant extract in triplicates. The investigation revealed the potency of G. pedunculata extract as an effective antibacterial agent against both Gram-positive bacteria (GPB) and Gram-negative bacteria (GNB). G. pedunculata are evaluated to be bactericidal against the tested bacteria. The antibacterial activity may be due to an individual compound or synergistic effect of more than one compound present in the medicinal plant extract. The minimum inhibitory concentrations (MIC) and minimum bactericidal concentrations (MBC) of the plant extracts were also investigated by using the broth microdilution method. HPLC-MS of the methanol extract of G. pedunculata fruit revealed the presence of Hydroxy Citric Acid Lactone (MW-190), Garcinone-E (MW-464), a-Mangostin (MW-410), β–Mangostin (MW-424), and γ-Mangostin (MW-396).
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Kavitha N, Thamilarasan V, Sengottuvelan N. Diketonato based ferrocene appended cyclometalated iridium(III) complexes: Anti-microbial and anti-cancer studies. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.122032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Ginting EV, Retnaningrum E, Widiasih DA. Antibacterial activity of clove ( Syzygium aromaticum) and cinnamon ( Cinnamomum burmannii) essential oil against extended-spectrum β-lactamase-producing bacteria. Vet World 2021; 14:2206-2211. [PMID: 34566340 PMCID: PMC8448639 DOI: 10.14202/vetworld.2021.2206-2211] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 07/13/2021] [Indexed: 11/29/2022] Open
Abstract
Background and Aim: Extended-spectrum β-lactamase (ESBL) is an enzyme produced by the family of Enterobacteriaceae, especially Escherichia coli and Klebsiella pneumoniae, which can hydrolyzeβ-lactam antibiotics, such as penicillins, cephalosporins, cephamycin, and carbapenem. ESBL-producing bacteria are widely distributed from farms to slaughterhouses until food products originating from animals are available in the market, which plays an important role as a pathway for the exposure and transmission of ESBL-producing bacteria from food products of animal origin to humans. This study aimed to determine the antibacterial activity of Syzygium aromaticum (clove) and Cinnamomum verum (cinnamon) essential oils against strains resistant to ESBL-producing E. coli and K. pneumoniae isolates. Materials and Methods: The antibacterial activity of clove and cinnamon essential oils was tested against three strains of tested bacteria using the disk diffusion method. The minimum inhibitory concentration (MIC) of clove and cinnamon essential oils was determined using the broth microdilution method. The minimumbactericidal concentration (MBC) was determined using the MIC. Morphological changes on each tested bacteria were observed through scanning electron microscopy (SEM). Results: Both essential oils exhibited inhibitory effects toward all test organisms, indicated by inhibition zones around the disk. The MIC values of clove essential oil were 0.078% (v/v) for all tested bacteria, whereas the MICs of cinnamon essential oil ranged from 0.039% (v/v) to 0.156% (v/v) for all tested bacteria. MBC values of clove and cinnamon essential oils ranged from 0.078% (v/v) to 0.156% (v/v) for all tested bacteria. There were morphological changes in each tested bacterial cell that was observed through SEM. Each tested bacteria treated with clove and cinnamon essential oils showed shrinkage and cells lysis. Conclusion: It was concluded that clove and cinnamon essential oils have emerged as effective antibacterial agents by showing high antibacterial activity against ESBL-producing E. coli and K. pneumoniae isolates, as evidenced by the inhibition zone diameter and MIC value.
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Affiliation(s)
| | | | - Dyah Ayu Widiasih
- Faculty of Veterinary Medicine, Universitas Gadjah Mada, Yogyakarta, Indonesia
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Mineral Analysis, In Vitro Evaluation of Alpha-Amylase, Alpha-Glucosidase, and Beta-Galactosidase Inhibition, and Antibacterial Activities of Juglans regia L. Bark Extracts. BIOMED RESEARCH INTERNATIONAL 2021; 2021:1585692. [PMID: 34485509 PMCID: PMC8413037 DOI: 10.1155/2021/1585692] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/06/2021] [Indexed: 11/29/2022]
Abstract
In traditional medicine, various parts of the plant Juglans regia L. are used to treat several pathological conditions including diabetes and infectious and periodontal diseases. This includes the bark of Juglans regia. The present study is aimed at evaluating for the first time the mineral composition, investigating the antidiabetic and antibacterial properties of Moroccan J. regia bark, and finally determining the correlations between the chemical composition of the tested extracts and their biological activities. The mineral composition was determined using inductively coupled plasma atomic emission spectroscopy. Then, nine extracts were prepared by different methods and modalities of extractions and investigated for their antidiabetic activities, via tests of inhibition of alpha-amylase, alpha-glucosidase, and beta-galactosidase enzymes, and for their antibacterial activities against six strains involved in infectious diseases and periodontology. Finally, the correlation between the chemical compositions of the different extracts prepared and their antidiabetic and antibacterial potencies was determined by Principal Component Analysis (PCA). J. regia is an important source of mineral elements, mainly Fe (19849.8), K (3487.8), Mg (2631.03), and P (691.02) mg/kg plant material. All the extracts of J. regia possess antidiabetic activity, and in particular, the macerated acetone extract gave the highest inhibitory activity against alpha-amylase (IC50 value of 5445.33 ± 82.58 μg/mL), alpha-glucosidase (IC50 value of 323.7 ± 1.71 μg/mL), and beta-galactosidase (IC50 value of 811.2 ± 8.32 μg/mL). For the results of antibacterial activity, the macerated acetone extract at the concentration of 80 mg/mL was found to be the most active by inducing inhibition diameters of 12, 17, 18, 11, 14.5, and 16 mm against Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus subtilis, and Listeria innocua, respectively. PCA allowed us to deduce that the extracts richer in polyphenols, in particular, the two acetone and ethanol macerates, have a better antidiabetic activity against alpha-glucosidase as well as a better antibacterial activity. The results of the present study revealed that the aqueous and organic macerate extracts showed a better antidiabetic activity and justified the use of J. regia bark as an antibacterial and antiseptic agent in traditional Moroccan medicine in the treatment of dental affections.
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Yamashita M, Sawano J, Umeda R, Tatsumi A, Kumeda Y, Iida A. Structure-Activity Relationship Studies of Antimicrobial Naphthoquinones Derived from Constituents of Tabebuia avellanedae. Chem Pharm Bull (Tokyo) 2021; 69:661-673. [PMID: 34193715 DOI: 10.1248/cpb.c21-00208] [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] [Indexed: 11/22/2022]
Abstract
In this study, based on our previous study, derivatives of naphtho[2,3-b]furan-4,9-diones were synthesized and their antimicrobial activities were evaluated. The screening of these naphthoquinones revealed that the fluorine-containing NQ008 compound exhibited potent and broad antimicrobial activities against Gram-positive bacteria including methicillin-resistant Staphylococcus aureus (MRSA), Gram-negative bacteria, and fungi. The results of the ratio of the minimum bactericidal concentration (MBC) to the minimum inhibitory concentrations (MICs) and time-kill assays suggest that the mode of action of NQ008 is bactericidal. Additionally, the results of a drug resistance study revealed that NQ008 exhibited potent antibacterial activity and may delay the development of bacteria resistance. Furthermore, NQ008 exhibited preliminary antiviral activity against the swine influenza virus and Feline calicivirus.
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Affiliation(s)
| | - Jun Sawano
- School of Agriculture, Kindai University
| | | | | | - Yuko Kumeda
- Research Center for Microorganism Control, Osaka Prefecture University
| | - Akira Iida
- School of Agriculture, Kindai University
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An Iron Shield to Protect Epigallocatehin-3-Gallate from Degradation: Multifunctional Self-Assembled Iron Oxide Nanocarrier Enhances Protein Kinase CK2 Intracellular Targeting and Inhibition. Pharmaceutics 2021; 13:pharmaceutics13081266. [PMID: 34452227 PMCID: PMC8402011 DOI: 10.3390/pharmaceutics13081266] [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: 07/20/2021] [Revised: 08/11/2021] [Accepted: 08/12/2021] [Indexed: 11/24/2022] Open
Abstract
Protein kinase CK2 is largely involved in cell proliferation and apoptosis and is generally recognized as an Achilles’ heel of cancer, being overexpressed in several malignancies. The beneficial effects of (−)-epigallocatechin-3-gallate (EGCG) in the prevention and treatment of several diseases, including cancer, have been widely reported. However, poor stability and limited bioavailability hinder the development of EGCG as an effective therapeutic agent. The combination of innovative nanomaterials and bioactive compounds into nanoparticle-based systems demonstrates the synergistic advantages of nanocomplexes as compared to the individual components. In the present study, we developed a self-assembled core-shell nanohybrid (SAMN@EGCG) combining EGCG and intrinsic dual-signal iron oxide nanoparticles (Surface Active Maghemite Nanoparticles). Interestingly, nano-immobilization on SAMNs protects EGCG from degradation, preventing its auto-oxidation. Most importantly, the nanohybrid was able to successfully deliver EGCG into cancer cells, displaying impressive protein kinase CK2 inhibition comparable to that obtained with the most specific CK2 inhibitor, CX-4945 (5.5 vs. 3 µM), thus promoting the phytochemical exploitation as a valuable alternative for cancer therapy. Finally, to assess the advantages offered by nano-immobilization, we tested SAMN@EGCG against Pseudomonas aeruginosa, a Gram-negative bacterium involved in severe lung infections. An improved antimicrobial effect with a drastic drop of MIC from 500 to 32.7 μM was shown.
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Gurram SR, Azam MA. Design, synthesis and biological evaluation of some novel N'-(1,3-benzothiazol-2-yl)-arylamide derivatives as antibacterial agents. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01730-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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49
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Synthesis, structural and in vitro biological evaluation of diamondoid-decorated lipophilic organotin(IV) derivatives. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Ma'rifah N, Hasmono D, Hadi U, Kuntaman K. Analysis of Quality of Antibiotic Usage on Patient with Internal and Surgical Service. FOLIA MEDICA INDONESIANA 2021. [DOI: 10.20473/fmi.v57i1.26327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
It is well-known that hospitals are health facility with the widely use of antibiotics. It is about 13-37% from the total hospitalized patients in developed countries use antibiotic, even in developing countries can reach 30-80%. There is identified correlation between antibiotic use and the development of bacterial resistance. Even though the resistance cannot be eliminated, but its development can be suppressed by the increasing of prudent use of antibiotics. The aim of this study was to determine the quality of antibiotic use on internal medicine and surgical patients in Aisiyah Hospital Bojonegoro. The study was a prospective cross sectional observational analytical study of among patients of internal and surgical who received antibiotic therapy in the period of August - September 2017. The total 50 samples were collected in this study which consists of 33 internal medicine and 17 surgical patients. From 50 samples, there were 16 types of antibiotics with the total use of 81 of antibiotic use. As the result, in internal medicine patients there were 22 (40%) of appropriate use of antibiotics, 4 (7.27%) of inappropriate use and 29 (52.73%) use of antibiotics without indication. In surgical patients, there were 12 (46.15%) of appropriate use of antibiotics, 2 (7.69%) of inappropriate use and 12 (46.15%) use of antibiotics without indication. This study showed that more than 50% of antibiotic use were inappropriate, and mainly antibiotic with no indication, among patients hospitalized in Aisyiyah Hospital Bojonegoro.
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