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Katebi K, Eslami H, Jabbari S. Prevalence and causes of self-medication for oral health problems: a systematic review and meta-analysis. BMC Oral Health 2024; 24:1115. [PMID: 39300478 DOI: 10.1186/s12903-024-04900-8] [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: 02/05/2024] [Accepted: 09/11/2024] [Indexed: 09/22/2024] Open
Abstract
INTRODUCTION Self-medication, particularly for oral and dental health problems, stands as a significant health and social concern. Therefore, the current systematic review and meta-analysis study was conducted to evaluate the prevalence and underlying causes of self-medication for oral and dental health problems. METHOD Articles published until August 30, 2023, were searched in Scopus, PubMed, and Web of Science databases. A manual search was also done in Google Scholar, references, citations, and Gray literature. The screening of articles was done independently by two members of the research team. The quality of reporting in the articles was evaluated using the JBI Critical Appraisal Checklist For Analytical Cross-Sectional Studies. Meta-analysis was performed using the fixed effects model in Stata software (StataCorp, version 16). RESULTS The results of 37 studies involving 12,110 participants with a mean age of 32 years and 48% male were analyzed. Most of the studies were conducted in low- and middle-income countries. The overall prevalence of self-medication was estimated at 59% [95%CI: 55-63%], with 58% [95% CI: 53-63%] among dental patients, and 60% [95% CI: 52-67%] in the general public. Analgesics (60%) and antibiotics (19%) were the most commonly used drug categories. In terms of the mean proportion, having previous experience, unbearable pain, and lack of time had the highest percentages, and in terms of the number of repetitions among the reviewed articles, economic problems, lack of time, and limited access were the most repeated reasons. The most significant related factors in self-treatment were female gender, higher education, and occupation. Pharmacies were the primary source of self-treatment medications. CONCLUSION The results showed a very high prevalence of self-medication for oral health problems, necessitating prompt and effective interventions. It is recommended to focus on regulating the consumption of analgesics and antibiotics, addressing financial issues, and overseeing the pharmacy operations.
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Affiliation(s)
- Katayoun Katebi
- Department of Oral and Maxillofacial Medicine, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hosein Eslami
- Department of Oral and Maxillofacial Medicine, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saba Jabbari
- Department of Oral and Maxillofacial Medicine, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
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2
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Singh P, Yadav S, Mahor AK, Singh PP, Bansal KK. Depiction of new flavonoids from Nyctanthus arbor-tristis, their antimicrobial activity and drug-likeness prediction. Nat Prod Res 2024:1-10. [PMID: 38712534 DOI: 10.1080/14786419.2024.2345757] [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: 08/02/2023] [Accepted: 04/15/2024] [Indexed: 05/08/2024]
Abstract
Bioactive compounds derived from medicinal plants, such as alkaloids, tannins and flavonoids, possess significant medicinal properties. These compounds have a broad and versatile impact on human nutrition and physiology, contributing to the treatment and management of various diseases. The isolation, structure elucidation and inhibition studies of two novel flavonoids against specific microorganisms, from the leaves of Nyctanthus arbor-tristis are reported in this study. It has been observed for the first time that the presence of an acyl aliphatic moiety, along with the O- glycoside unit at C-7, and the hydroxyl group at C-5, C-4' position in apigenin significantly enhanced antimicrobial activity. Moreover, bioactivity was also investigated through 'Molinspiration' on various parameters followed by the 'rule of five'. This study can be used to highlight the need for the potential development of natural therapeutic products with fewer side effects.
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Affiliation(s)
- Preeti Singh
- Department of Physical Science, Rabindra Nath Tagore University, Bhopal, India
| | - Surabhi Yadav
- Natural Product Laboratory, Department of Chemistry, Bipin Bihari Degree College, Natural Product Laboratory, Jhansi, India
| | | | | | - Kuldeep K Bansal
- Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Abo Akademi University, Turku, Finland
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3
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Štumpf S, Hostnik G, Langerholc T, Pintarič M, Kolenc Z, Bren U. The Influence of Chestnut Extract and Its Components on Antibacterial Activity against Staphylococcus aureus. PLANTS (BASEL, SWITZERLAND) 2023; 12:2043. [PMID: 37653960 PMCID: PMC10221632 DOI: 10.3390/plants12102043] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/17/2023] [Accepted: 05/18/2023] [Indexed: 09/02/2023]
Abstract
Increasing antimicrobial resistance has caused a great interest in natural products as alternatives or potentiators of antibiotics. The objective of this study was to isolate individual tannins from crude chestnut extract as well as to determine the influence of both crude extracts (tannic acid extract, chestnut extract) and individual pure tannins (gallic acid, vescalin, vescalagin, castalin, castalagin) on the growth of Gram-positive Staphylococcus aureus bacteria. Their antibacterial activity was monitored by measuring the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) as well as the duration of the lag phase, growth rate and generation time. The effect of growth medium strength on the MIC of different tannins was also investigated. Bacterial growth was followed spectrophotometrically, and MIC values were determined by the microdilution method. The MIC values of various isolated compounds allowed us to determine the bioactive compounds and their contribution to antimicrobial activity. It was found that MIC values increase with increasing growth medium strength and that the lag phase lengthens with increasing tannin concentrations, while the growth rates decrease. Comparing the results of the two studies, the antimicrobial activity of tannins against S. aureus was not as pronounced as in the case of E. coli, which may indicate that a different mechanism of action is responsible for the antimicrobial effects of tannins on Gram-positive than on Gram-negative bacteria, or that a different mechanism is more pronounced.
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Grants
- J1-2471, P2-0046, L2-3175, J4-4633, J1-4398, L2-4430, J3-4498, J7-4638, J1-4414, J3-4497, P2-0438, I0-E015 Slovenian Research Agency
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Affiliation(s)
- Sara Štumpf
- Laboratory of Physical Chemistry and Chemical Thermodynamics, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | - Gregor Hostnik
- Laboratory of Physical Chemistry and Chemical Thermodynamics, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | - Tomaž Langerholc
- Department of Microbiology, Biochemistry, Molecular Biology and Biotechnology, Faculty of Agriculture and Life Sciences, University of Maribor, Pivola 10, 2311 Hoče, Slovenia
| | - Maša Pintarič
- Department of Microbiology, Biochemistry, Molecular Biology and Biotechnology, Faculty of Agriculture and Life Sciences, University of Maribor, Pivola 10, 2311 Hoče, Slovenia
| | - Zala Kolenc
- Laboratory of Physical Chemistry and Chemical Thermodynamics, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
- Department of Microbiology, Biochemistry, Molecular Biology and Biotechnology, Faculty of Agriculture and Life Sciences, University of Maribor, Pivola 10, 2311 Hoče, Slovenia
- Department of Applied Natural Sciences, Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Glagoljaška 8, 6000 Koper, Slovenia
| | - Urban Bren
- Laboratory of Physical Chemistry and Chemical Thermodynamics, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
- Department of Applied Natural Sciences, Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Glagoljaška 8, 6000 Koper, Slovenia
- Institute of Environmental Protection and Sensors, Beloruska 7, 2000 Maribor, Slovenia
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4
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Gupta T, Kataria R, Sardana S. A Comprehensive Review on Current perspectives of Flavonoids as antimicrobial agent. Curr Top Med Chem 2022; 22:425-434. [PMID: 35040402 DOI: 10.2174/1568026622666220117104709] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 12/15/2021] [Accepted: 12/21/2021] [Indexed: 11/22/2022]
Abstract
Flavonoids are the secondary plant metabolites with diversities of pharmacological activities like antioxidant, anticancer, anti-inflammatory, hepatoprotective, free radical scavenging activity and antiviral activities. Flavonoids have also been proved as a major contributor to the antimicrobial phytochemicals. Being the major substituent of antibiotics today flavonoids has attained high attention as there is increase in persistence of untreatable microbial infections due to microbial resistance. This review demonstrates the screening, isolation of extracts and derivatisation of various flavonoids and their evaluation for antimicrobial potency. Recent advancements of various derivatives of flavonoids having antimicrobial activity has also been discussed in this review. This review helps researchers to get vast knowledge about flavonoids and also give an idea for current scenario of flavonoids and its applications as antimicrobial agent.
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Affiliation(s)
- Tanya Gupta
- KIET School of Pharmacy, KIET Group of Institutions, Delhi-NCR, Ghaziabad 201206, India
| | - Ritu Kataria
- G.V.M College of Pharmacy, Sonipat, Haryana, India
| | - Satish Sardana
- Amity Institute of Pharmacy, Amity University, Haryana, Gurugram, India
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Novel Tetrazole-Based Antimicrobial Agents Targeting Clinical Bacteria Strains: Exploring the Inhibition of Staphylococcus aureus DNA Topoisomerase IV and Gyrase. Int J Mol Sci 2021; 23:ijms23010378. [PMID: 35008805 PMCID: PMC8745314 DOI: 10.3390/ijms23010378] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/22/2021] [Accepted: 12/28/2021] [Indexed: 01/15/2023] Open
Abstract
Eleven novel imide-tetrazoles were synthesized. In the initial stage of research, in silico structure-based pharmacological prediction was conducted. All compounds were screened for antimicrobial activity using standard and clinical strains. Within the studied group, compounds 1-3 were recognized as leading structures with the most promising results in antimicrobial studies. Minimal inhibitory concentration values for compounds 1, 2, 3 were within the range of 0.8-3.2 μg/mL for standard and clinical Gram-positive and Gram-negative bacterial strains, showing in some cases higher activity than the reference Ciprofloxacin. Additionally, all three inhibited the growth of all clinical Staphylococci panels: Staphylococcus aureus (T5592; T5591) and Staphylococcus epidermidis (5253; 4243) with MIC values of 0.8 μg/mL. Selected compounds were examined in topoisomerase IV decatenation assay and DNA gyrase supercoiling assay, followed by suitable molecular docking studies to explore the possible binding modes. In summary, the presented transition from substrate imide-thioureas to imide-tetrazole derivatives resulted in significant increase of antimicrobial properties. The compounds 1-3 proposed here provide a promising basis for further exploration towards novel antimicrobial drug candidates.
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6
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Daison FA, Kumar N, Balakrishnan S, Venugopal K, Elango S, Sokkar P. Molecular Dynamics Studies on the Bacterial Membrane Pore Formation by Small Molecule Antimicrobial Agents. J Chem Inf Model 2021; 62:40-48. [PMID: 34932333 DOI: 10.1021/acs.jcim.1c01049] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Antimicrobial peptides (AMPs) act on the membrane bilayer of pathogens, causing leakage in the membrane and cell death. Amphiphilic kaempferol derivatives possessing basic functional groups show excellent antibacterial activities, which has been proven through experimental techniques. These compounds are known to target negatively charged bacterial membranes. However, the detailed mechanism of action and their structure-activity relationship are not clear. In this work, we reported theoretical investigation on the mechanism of action of two previously reported kaempferol derivatives on a DMPC/DMPG mixed bilayer. Despite the rigid structure of the compounds when compared to AMPs, spontaneous pore formation in the membrane was not observed in 400 ns molecular dynamics (MD) simulations. MD simulations with biasing forces resulted in the formation of pores in the bilayer for the derivatives and not for kaempferol. The stability of the pores was assessed by pore closure timescales in unbiased MD simulations, which was found to be 5.3 and 17.0 ns for 2 and 3, respectively. Free energy change for the permeation into the bilayer for kaempferol (1), tertiary amine derivative (2), and arginine derivative (3) was calculated to be -1.5, -48.2, and -100.3 kJ/mol, respectively, which correlate with their antibacterial activity. Furthermore, our results indicate that compound 3 forms a stable toroidal pore in the membrane when multiple molecules are oriented in a transmembrane configuration. Our work sheds light on the mechanism of action of small molecule antimicrobial agents, which can be exploited for the rational design of drug candidates.
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Affiliation(s)
- Felsis Angelene Daison
- Department of Biotechnology, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, India
| | - Nitheeshkumar Kumar
- Department of Biotechnology, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, India
| | - Siranjeevi Balakrishnan
- Department of Biotechnology, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, India
| | - Kavyashree Venugopal
- Department of Biotechnology, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, India
| | - Sangamithra Elango
- Department of Biotechnology, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, India
| | - Pandian Sokkar
- Department of Biotechnology, Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam 603103, India
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7
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Enhancing the drug sensitivity of antibiotics on drug-resistant bacteria via the photothermal effect of FeTGNPs. J Control Release 2021; 341:51-59. [PMID: 34785316 DOI: 10.1016/j.jconrel.2021.11.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 10/29/2021] [Accepted: 11/10/2021] [Indexed: 12/24/2022]
Abstract
The growing problem of bacterial resistance caused by the abuse of antibiotics is a serious challenge for the world. In order to make the clinically available antibiotics regain their bactericidal effect, our study introduced photothermal therapy (PTT) to assist antibiotics to annihilate drug-resistant bacteria. To achieve the synergistic effect, nanoparticles (FeTGNPs) with an antibiotic core (gatifloxacin complexing with tannins) and a photothermal shell (ferric iron coordinating with tannins) were prepared directly in aqueous solution by a convenient yet efficient one-pot synthesis. The excellent photothermal properties of the shell of FeTGNPs were used to break the mechanism of bacterial resistance, and the sustained-release of gatifloxacin from the core regained the killing effect against drug-resistant bacteria. From the results of antibacterial experiments, with the synergistic effect of APTT and antibiotics, FeTGNPs (400 μg/mL) could effectively kill methicillin-resistant Staphylococcus aureus (sterilizing rate up to 96.5 %) and gatifloxacin-resistant Staphylococcus aureus (sterilizing rate up to 98.7 %) than equivalent antibiotics. Moreover, under slightly acidic microenvironment, such as infection area, gatifloxacin could accelerate its release from the core of FeTGNPs. Therefore, FeTGNPs would be a highly effective antibacterial agent against drug-resistant bacterial infections in the future.
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8
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Sadaf HM, Bibi Y, Ishaque M, Nisa S, Qayyum A, Safdar N, Shah ZH, Alsamadany H, Chung G. Determination of ROS Scavenging, Antibacterial and Antifungal Potential of Methanolic Extract of Otostegia limbata (Benth.) Boiss. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10112360. [PMID: 34834723 PMCID: PMC8625134 DOI: 10.3390/plants10112360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 10/20/2021] [Accepted: 10/27/2021] [Indexed: 06/13/2023]
Abstract
Wide spectrum medicinal significance augments plant utilization as the primary source of significant pharmaceutical agents. In vitro investigation of antioxidant and antimicrobial activity highlights the therapeutic potential of Otostegia limbata. Methanol extract of the plant (MEP) shows considerable dose dependent antioxidant ability at six concentrations (7.81 µg/mL to 250 µg/mL) in 2.2-diphenyl-1-picrylhydrazyl (DPPH) assay, phosphomolybdate assay (PMA) and reducing power assay (RPA). The plant capability to scavenge free radicals in the mixture ranged from 37.89% to 63.50% in a concentration-dependent manner. MEP was active against five tested bacterial strains in the agar-well diffusion method. Staphylococcus aureus, gram-positive bacteria was found to be most susceptible followed by S. epidermidis with 18.80 mm and 17.47 mm mean zone of inhibition. The mean inhibition zone against gram-negative strains Klebsiella pneumonia, Pseudomonas spp. and Escherichia coli were 15.07 mm, 14.73 mm, and 12.17 mm. MEP revealed potential against Alternaria spp. and Aspergillus terreus fungal strains evaluated through agar-tube dilution assay. Aspergillus terreus was more sensitive than Alternaria spp. with an average 78.45% and 68.0% inhibition. These findings can serve as a benchmark for forthcoming scrutiny such as bioactive components discovery and drug development.
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Affiliation(s)
- Huma Mehreen Sadaf
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Rawalpindi 46000, Pakistan; (H.M.S.); (Y.B.); (M.I.)
| | - Yamin Bibi
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Rawalpindi 46000, Pakistan; (H.M.S.); (Y.B.); (M.I.)
| | - Muhammad Ishaque
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Rawalpindi 46000, Pakistan; (H.M.S.); (Y.B.); (M.I.)
| | - Sobia Nisa
- Department of Microbiology, The University of Haripur, Haripur 22620, Pakistan;
| | - Abdul Qayyum
- Department of Agronomy, The University of Haripur, Haripur 22620, Pakistan
| | - Naila Safdar
- Department of Biotechnology, Fatima Jinnah Women University, Rawalpindi 46000, Pakistan;
| | - Zahid Hussain Shah
- Department of Plant Breeding and Genetics, PMAS-Arid Agriculture University Rawalpindi, Rawalpindi 46300, Pakistan;
| | - Hameed Alsamadany
- Department of Biological Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Gyuhwa Chung
- Department of Biotechnology, Chonnam National University, Yeosu 59626, Chonnam, Korea
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9
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Liao W, Shi X, Zhuo LG, Yang X, Zhao P, Kan W, Wang G, Wei H, Yang Y, Zhou Z, Wang J. Comparison and Mechanism Study of Antibacterial Activity of Cationic and Neutral Oligo-Thiophene-Ethynylene. ACS APPLIED MATERIALS & INTERFACES 2021; 13:41012-41020. [PMID: 34410119 DOI: 10.1021/acsami.1c02474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Photodynamic therapy (PDT) is a potential approach to resolve antibiotic resistance, and phenylene/thiophene-ethynylene oligomers have been widely studied as effective antibacterial reagents. Oligomers with thiophene moieties usually exhibit good antibacterial activity under light irradiation and dark conditions. In the previous study, we verified that neutral oligo-p-phenylene-ethynylenes (OPEs) exhibit better antibacterial activity than the corresponding cationic ones; however, whether this regular pattern also operates in other kinds of oligomers such as oligo-thiophene-ethynylene (OTE) is unknown. Also, the antibacterial activity comparison of OTEs bearing cyclic and acyclic amino groups will offer useful information to further understand the role of amino groups in the antibacterial process and guide the antibacterial reagent design as amino groups affect the antibacterial activity a lot. We synthesized four OTEs bearing neutral or cationic, cyclic, or acyclic amino groups and studied their antibacterial activity in detail. The experimental results indicated that the OTEs exhibited better antibacterial activity than the OPEs, the neutral OTEs exhibited better antibacterial activity in most cases, and OTEs bearing cyclic amino groups exhibited better antibacterial activity than those bearing acyclic ones in most cases. This study provides useful guidelines for further antibacterial reagent design and investigations.
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Affiliation(s)
- Wei Liao
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China.,Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
| | - Xiaoyi Shi
- West China Hospital of Sichuan University Cleaning and Disinfection Supply Center, Chengdu, Sichuan 610041, P. R. China
| | - Lian-Gang Zhuo
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China.,Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China.,Collaborative Innovation Center of Radiation Medicine of Jiangsu, Higher Education Institutions, Suzhou 215123, P. R. China
| | - Xia Yang
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China.,Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China.,Collaborative Innovation Center of Radiation Medicine of Jiangsu, Higher Education Institutions, Suzhou 215123, P. R. China
| | - Peng Zhao
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China.,Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
| | - Wentao Kan
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China.,Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
| | - Guanquan Wang
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China.,Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
| | - Hongyuan Wei
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China.,Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China.,Collaborative Innovation Center of Radiation Medicine of Jiangsu, Higher Education Institutions, Suzhou 215123, P. R. China
| | - Yuchuan Yang
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China.,Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China.,Collaborative Innovation Center of Radiation Medicine of Jiangsu, Higher Education Institutions, Suzhou 215123, P. R. China
| | - Zhijun Zhou
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China.,Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P. R. China
| | - Jing Wang
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China.,Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
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10
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Liao W, Zhuo LG, Yang X, Zhao P, Kan W, Wang G, Song H, Wei H, Yang Y, Tian G, Zhao R, Zhou Z, Wang J. Biocidal Activity and Mechanism Study of Unsymmetrical Oligo-Phenylene-Ethynylenes. ACS APPLIED BIO MATERIALS 2020; 3:5644-5651. [DOI: 10.1021/acsabm.0c00267] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Wei Liao
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
| | - Lian-gang Zhuo
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu, Higher Education Institutions, Suzhou 215123, P. R. China
| | - Xia Yang
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu, Higher Education Institutions, Suzhou 215123, P. R. China
| | - Peng Zhao
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
| | - Wentao Kan
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
| | - Guanquan Wang
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
| | - Hu Song
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
| | - Hongyuan Wei
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu, Higher Education Institutions, Suzhou 215123, P. R. China
| | - Yuchuan Yang
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu, Higher Education Institutions, Suzhou 215123, P. R. China
| | - Guozhong Tian
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, P. R. China
| | - Rongtao Zhao
- PLA Center for Disease Control and Prevention, Beijing 100071, P. R. China
| | - Zhijun Zhou
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Jing Wang
- Institute of Nuclear Physics and Chemistry (INPC), China Academy of Engineering Physics (CAEP), Mianyang 621999, P. R. China
- Key Laboratory of Nuclear Medicine and Molecular Imaging of Sichuan Province, Mianyang 621999, P. R. China
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11
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Sarbu LG, Bahrin LG, Babii C, Stefan M, Birsa ML. Synthetic flavonoids with antimicrobial activity: a review. J Appl Microbiol 2019; 127:1282-1290. [PMID: 30934143 DOI: 10.1111/jam.14271] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 03/15/2019] [Accepted: 03/26/2019] [Indexed: 01/07/2023]
Abstract
The emergence of drug-resistant microbes left us with a great need for new antimicrobial agents. Flavonoids, with their wide range of biological activities, are good candidates in this respect. Although naturally occurring flavonoids are the most studied ones, semi-synthetic or synthetic flavonoids have proven to have great potential, inhibiting and even killing microbes at concentrations below 1 μg ml-1 . The substitution pattern of these flavonoids often includes hydroxy groups, halogens or other heteroatomic rings, such as pyridine, piperidine or 1,3-dithiolium cations. However, the great variety in substituents makes it difficult to draw any definitive conclusion regarding their structure-activity relationship.
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Affiliation(s)
- L G Sarbu
- Department of Chemistry, "Al. I. Cuza" University of Iasi, Iasi, Romania
| | - L G Bahrin
- Department of Chemistry, "Al. I. Cuza" University of Iasi, Iasi, Romania.,"Petru Poni" Institute of Macromolecular Chemistry, Iasi, Romania
| | - C Babii
- Department of Biology, "Al. I. Cuza" University of Iasi, Iasi, Romania.,Integrated Center for Environmental Sciences Studies - North Eastern, CERNESIM, Alexandru Ioan Cuza University of Iasi, Iasi, Romania
| | - M Stefan
- Department of Biology, "Al. I. Cuza" University of Iasi, Iasi, Romania
| | - M L Birsa
- Department of Chemistry, "Al. I. Cuza" University of Iasi, Iasi, Romania
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12
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Minasyan H. Sepsis: mechanisms of bacterial injury to the patient. Scand J Trauma Resusc Emerg Med 2019; 27:19. [PMID: 30764843 PMCID: PMC6376788 DOI: 10.1186/s13049-019-0596-4] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 02/01/2019] [Indexed: 12/17/2022] Open
Abstract
In bacteremia the majority of bacterial species are killed by oxidation on the surface of erythrocytes and digested by local phagocytes in the liver and the spleen. Sepsis-causing bacteria overcome this mechanism of human innate immunity by versatile respiration, production of antioxidant enzymes, hemolysins, exo- and endotoxins, exopolymers and other factors that suppress host defense and provide bacterial survival. Entering the bloodstream in different forms (planktonic, encapsulated, L-form, biofilm fragments), they cause different types of sepsis (fulminant, acute, subacute, chronic, etc.). Sepsis treatment includes antibacterial therapy, support of host vital functions and restore of homeostasis. A bacterium killing is only one of numerous aspects of antibacterial therapy. The latter should inhibit the production of bacterial antioxidant enzymes and hemolysins, neutralize bacterial toxins, modulate bacterial respiration, increase host tolerance to bacterial products, facilitate host bactericidal mechanism and disperse bacterial capsule and biofilm.
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13
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14
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Alencar LM, de Oliveira LH, Backes R, Rosa TM, de Oliveira PR, da Silva RAB, Trindade MAG. Liquid-liquid Extraction Coupled to Batch Injection Analysis for Electroanalysis of Levofloxacin at Low Concentration Level. ELECTROANAL 2017. [DOI: 10.1002/elan.201700364] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Letícia Machado Alencar
- Faculdade de Ciências Exatas e Tecnologias; Universidade Federal da Grande Dourados; Rodovia Dourados-Itahum, km 12 Dourados-MS Brazil
| | - Luiz Henrique de Oliveira
- Faculdade de Ciências Exatas e Tecnologias; Universidade Federal da Grande Dourados; Rodovia Dourados-Itahum, km 12 Dourados-MS Brazil
| | - Rafael Backes
- Faculdade de Ciências Exatas e Tecnologias; Universidade Federal da Grande Dourados; Rodovia Dourados-Itahum, km 12 Dourados-MS Brazil
| | - Tamires Macedo Rosa
- Faculdade de Ciências Exatas e Tecnologias; Universidade Federal da Grande Dourados; Rodovia Dourados-Itahum, km 12 Dourados-MS Brazil
| | - Paulo Roberto de Oliveira
- Faculdade de Ciências Exatas e Tecnologias; Universidade Federal da Grande Dourados; Rodovia Dourados-Itahum, km 12 Dourados-MS Brazil
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15
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16
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Oramadike CE, Ogunbanwo ST. Antagonistic activity of Thymus vulgaris extracts against Vibrio species isolated from seafoods. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2017; 54:1199-1205. [PMID: 28416870 PMCID: PMC5380626 DOI: 10.1007/s13197-017-2543-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 01/18/2017] [Accepted: 02/08/2017] [Indexed: 10/20/2022]
Abstract
This study examined the antibacterial activity of Thymus vulgaris on multiple antibiotic resistant (MAR) Vibrio parahaemolyticus and Vibrio fluvialis isolated from shrimps. The ethanol extract of T. vulgaris antibacterial properties was assessed using the agar diffusion method. Survival of test organisms in shrimp meat using different concentrations of T. vulgaris was done using standard method. The quantitative and qualitative phytochemical tests of T. vulgaris extract were determined. The ethanol extract had antimicrobial activities on the test organisms showing 20.00 ± 0.0 and 23.00 ± 0.0 mm zone of inhibition on V. parahaemolyticus and V. fluvialis respectively. T. vulgaris completely decreased microbial load of V. parahaemolyticus and V. fluvialis in 150 and 60 min, respectively. The phytochemical screening for the ethanol extract reported phenol, alkaloids, tannin, saponin, anthraquinone flavonoid and cardiac glycoside as 51.76, 26.60, 6.76, 54.33, 30.35 89.65 and 18.23 mg/100 g, respectively. This study reveals the antibacterial property of T. vulgaris on the MAR Vibrio species.
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Affiliation(s)
- Chigozie Eunice Oramadike
- Nigerian Institute for Oceanography and Marine Research, No. 3, Wilmot Point Road, off Ahmadu Bello Way, P.M.B. 12729, Victoria Island, Lagos Nigeria
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17
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Kota S, Govada VR, Anantha RK, Verma MK. An Investigation into phytochemical constituents, antioxidant, antibacterial and anti-cataract activity of Alternanthera sessilis, a predominant wild leafy vegetable of South India. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2017. [DOI: 10.1016/j.bcab.2017.03.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Wang J, Zhuo L, Liao W, Yang X, Tang Z, Chen Y, Luo S, Zhou Z. Assessing the Biocidal Activity and Investigating the Mechanism of Oligo-p-phenylene-ethynylenes. ACS APPLIED MATERIALS & INTERFACES 2017; 9:7964-7971. [PMID: 28221027 DOI: 10.1021/acsami.6b16243] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A number of oligo-p-phenylene-ethynylenes (OPEs) have exhibited excellent biocidal activity against both Gram-negative and Gram-positive bacteria. Although cell death may occur in the dark, these biocidal compounds are far more effective in the light as a result of their abilities to generate cell-damaging reactive oxygen species. In this study, the interactions of four OPEs with Escherichia coli and Staphylococcus aureus have been investigated. Compared to the OPEs with quaternary ammonium salts (Q-OPE), the OPEs with tertiary ammonium (T-OPE) effectively kill many more bacterial cells under light irradiation, presumably by severe perturbations of the bacterial cell wall and cytoplasmic membrane. According to the findings from this study, such intriguing light-induced antibacterial behavior is probably attributed to the combination of bacterial membrane disruption and the interfacial or intracellular generation of singlet oxygen or other ROS. Singlet oxygen was proved to be formed from irradiation of the OPEs, whereas the varying cell membrane perturbation abilities of OPEs enhance antibacterial activity.
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Affiliation(s)
- Jing Wang
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , 64 Mianshan Road, Mianyang, Sichuan 621900, People's Republic of China
| | - Liangang Zhuo
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , 64 Mianshan Road, Mianyang, Sichuan 621900, People's Republic of China
| | - Wei Liao
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , 64 Mianshan Road, Mianyang, Sichuan 621900, People's Republic of China
| | - Xia Yang
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , 64 Mianshan Road, Mianyang, Sichuan 621900, People's Republic of China
| | - Zhenghua Tang
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre , Guangzhou 510006, People's Republic of China
- Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou Higher Education Mega Centre , Guangzhou 510006, People's Republic of China
| | - Yue Chen
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University , Luzhou, Sichuan 646000, People's Republic of China
| | - Shunzhong Luo
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , 64 Mianshan Road, Mianyang, Sichuan 621900, People's Republic of China
| | - Zhijun Zhou
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , 64 Mianshan Road, Mianyang, Sichuan 621900, People's Republic of China
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19
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Railean-Plugaru V, Pomastowski P, Rafinska K, Wypij M, Kupczyk W, Dahm H, Jackowski M, Buszewski B. Antimicrobial properties of biosynthesized silver nanoparticles studied by flow cytometry and related techniques. Electrophoresis 2016; 37:752-61. [PMID: 26763104 DOI: 10.1002/elps.201500507] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 12/22/2015] [Accepted: 12/22/2015] [Indexed: 11/05/2022]
Abstract
This work reports the effect of silver bionanoparticles (Bio(AgNPs) synthesized by Actinobacteria CGG 11n on selected Gram (+) and Gram (-) bacteria. Flow cytometry, classical antibiogram method and fluorescent microscopy approach was used for evaluation of antimicrobial activity of Bio(AgNPs) and their combination with antibiotics. Furthermore, the performed research specified the capacity of flow cytometry method as an alternative to the standard ones and as a complementary method to electromigration techniques. The study showed antibacterial activity of both BioAgNPs and the combination of antibiotics/BioAgNPs against all the tested bacteria strains in comparison with a diffusion, dilution and bioautographic methods. The synergistic effect of antibiotics/BioAgNPs combination (e.g. kanamycin, ampicillin, neomycin and streptomycin) was found to be more notable against Pseudomonas aeruginosa representing a prototype of multi-drug resistant "superbugs" for which effective therapeutic options are very limited.
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Affiliation(s)
- Viorica Railean-Plugaru
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland.,Interdisciplinary Centre of Modern Technology, Nicolaus Copernicus University, Torun, Poland
| | - Pawel Pomastowski
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland.,Interdisciplinary Centre of Modern Technology, Nicolaus Copernicus University, Torun, Poland
| | - Katarzyna Rafinska
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland.,Interdisciplinary Centre of Modern Technology, Nicolaus Copernicus University, Torun, Poland
| | - Magdalena Wypij
- Department of Microbiology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Torun, Poland
| | - Wojciech Kupczyk
- Department of Surgery, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Hanna Dahm
- Department of Microbiology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Torun, Poland
| | - Marek Jackowski
- Department of Surgery, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Boguslaw Buszewski
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland.,Interdisciplinary Centre of Modern Technology, Nicolaus Copernicus University, Torun, Poland
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20
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Omosa LK, Midiwo JO, Mbaveng AT, Tankeo SB, Seukep JA, Voukeng IK, Dzotam JK, Isemeki J, Derese S, Omolle RA, Efferth T, Kuete V. Antibacterial activities and structure-activity relationships of a panel of 48 compounds from Kenyan plants against multidrug resistant phenotypes. SPRINGERPLUS 2016; 5:901. [PMID: 27386347 PMCID: PMC4923020 DOI: 10.1186/s40064-016-2599-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 06/16/2016] [Indexed: 12/04/2022]
Abstract
In the current study forty eight compounds belonging to anthraquinones, naphthoquinones, benzoquinones, flavonoids (chalcones and polymethoxylated flavones) and diterpenoids (clerodanes and kauranes) were explored for their antimicrobial potential against a panel of sensitive and multi-drug resistant Gram-negative and Gram-positive bacteria. The minimal inhibitory concentration (MIC) determinations on the tested bacteria were conducted using modified rapid INT colorimetric assay. To evaluate the role of efflux pumps in the susceptibility of Gram-negative bacteria to the most active compounds, they were tested in the presence of phenylalanine arginine β-naphthylamide (PAβN) (at 30 µg/mL) against selected multidrug resistance (MDR) bacteria. The anthraquinone, emodin, naphthaquinone, plumbagin and the benzoquinone, rapanone were active against methicillin resistant Staphylococcus aureus (MRSA) strains of bacteria with MIC values ranging from 2 to 128 μg/mL. The structure activity relationships of benzoquinones against the MDR Gram-negative phenotype showed antibacterial activities increasing with increase in side chain length. In the chalcone series the presence of a hydroxyl group at C3′ together with a methoxy group and a second hydroxyl group in meta orientation in ring B of the chalcone skeleton appeared to be necessary for minimal activities against MRSA. In most cases, the optimal potential of the active compounds were not attained as they were extruded by bacterial efflux pumps. However, the presence of the PAβN significantly increased the antibacterial activities of emodin against Gram-negative MDR E. coli AG102, 100ATet; K. pneumoniae KP55 and KP63 by >4–64 g/mL. The antibacterial activities were substantially enhanced and were higher than those of the standard drug, chloramphenicol. These data clearly demonstrate that the active compounds, having the necessary pharmacophores for antibacterial activities, including some quinones and chalcones are substrates of bacterial efflux pumps and therefore should be combined to efflux pump inhibitors in the fight against MDR bacterial infections.
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Affiliation(s)
- Leonidah K Omosa
- Department of Chemistry, School of Physical Sciences, University of Nairobi, P. O. Box 30197-00100, Nairobi, Kenya ; Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany
| | - Jacob O Midiwo
- Department of Chemistry, School of Physical Sciences, University of Nairobi, P. O. Box 30197-00100, Nairobi, Kenya
| | - Armelle T Mbaveng
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Simplice B Tankeo
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Jackson A Seukep
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Igor K Voukeng
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Joachim K Dzotam
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - John Isemeki
- Department of Chemistry, School of Physical Sciences, University of Nairobi, P. O. Box 30197-00100, Nairobi, Kenya
| | - Solomon Derese
- Department of Chemistry, School of Physical Sciences, University of Nairobi, P. O. Box 30197-00100, Nairobi, Kenya
| | - Ruth A Omolle
- Department of Chemistry, School of Physical Sciences, University of Nairobi, P. O. Box 30197-00100, Nairobi, Kenya
| | - Thomas Efferth
- Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany
| | - Victor Kuete
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
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21
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Bahrin LG, Hopf H, Jones PG, Sarbu LG, Babii C, Mihai AC, Stefan M, Birsa LM. Antibacterial structure-activity relationship studies of several tricyclic sulfur-containing flavonoids. Beilstein J Org Chem 2016; 12:1065-71. [PMID: 27340492 PMCID: PMC4902053 DOI: 10.3762/bjoc.12.100] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 05/09/2016] [Indexed: 11/23/2022] Open
Abstract
A structure–activity relationship study concerning the antibacterial properties of several halogen-substituted tricyclic sulfur-containing flavonoids has been performed. The compounds have been synthesized by cyclocondensation of the corresponding 3-dithiocarbamic flavanones under acidic conditions. The influence of different halogen substituents on the antibacterial properties has been tested against Staphylococcus aureus and Escherichia coli. Amongst the N,N-dialkylamino-substituted flavonoids, those having an N,N-diethylamino moiety exhibited good to excellent antimicrobial properties against both pathogens. Fluorine-substituted flavonoids were found to be less active than those bearing other halogen atoms.
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Affiliation(s)
- Lucian G Bahrin
- Department of Chemistry, "Al. I. Cuza" University of Iasi, 11 Carol I Blvd., RO-700506 Iasi, Romania; Institute of Organic Chemistry, Technical University of Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany
| | - Henning Hopf
- Institute of Organic Chemistry, Technical University of Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany
| | - Peter G Jones
- Institute of Inorganic and Analytical Chemistry, Technical University of Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany
| | - Laura G Sarbu
- Department of Chemistry, "Al. I. Cuza" University of Iasi, 11 Carol I Blvd., RO-700506 Iasi, Romania
| | - Cornelia Babii
- Department of Biology, Al. I. Cuza University of Iasi, 11 Carol I, 700506-Iasi, Romania
| | - Alina C Mihai
- Department of Biology, Al. I. Cuza University of Iasi, 11 Carol I, 700506-Iasi, Romania
| | - Marius Stefan
- Department of Biology, Al. I. Cuza University of Iasi, 11 Carol I, 700506-Iasi, Romania
| | - Lucian M Birsa
- Department of Chemistry, "Al. I. Cuza" University of Iasi, 11 Carol I Blvd., RO-700506 Iasi, Romania; Institute of Organic Chemistry, Technical University of Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany
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22
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Wu H, Cao D, Liu T, Zhao J, Hu X, Li N. Purification and Characterization of Recombinant Human Lysozyme from Eggs of Transgenic Chickens. PLoS One 2015; 10:e0146032. [PMID: 26713728 PMCID: PMC4694923 DOI: 10.1371/journal.pone.0146032] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Accepted: 12/11/2015] [Indexed: 11/18/2022] Open
Abstract
Transgenic chickens as bioreactors have several advantages, such as the simple establishment procedure, correct glycosylation profile of expressed proteins, etc. Lysozyme is widely used in food industry, livestock farming, and medical field as a replacement of antibiotics because of its antibacterial and complement system-modulating activity. In this study, we used RT-PCR, Western blot, and immunofluorescence to detect the expression of recombinant human lysozyme (rhLY) in the transgenic chicken. We demonstrated that the transgene of rhLY was genetically stable across different generations. We next optimized the purification procedure of rhLY from the transgenic eggs by utilizing two steps of cation-exchange chromatography and one gel-filtration chromatography. About 6 mg rhLY with the purity exceeding 90% was obtained from ten eggs, and the purification efficiency was about 75%. The purified rhLY had similar physicochemical and biological properties in molecular mass and antibacterial activity compared to the commercial human lysozyme. Additionally, both of them exhibited thermal stability at 60°C and tolerated an extensive pH range of 2 to 11. In conclusion, our study proved that the transgenic chickens we have previously generated were genetically stable and suitable for the production of active rhLY. We also provided a pipeline for purifying the recombinant proteins from transgenic eggs, which could be useful for other studies.
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Affiliation(s)
- Hanyu Wu
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, P. R. China
| | - Dainan Cao
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, P. R. China
| | - Tongxin Liu
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, P. R. China
| | - Jianmin Zhao
- Wuxi KGBIO Biotechnology Limited Liability Company, Jiangsu 214145, P. R. China
| | - Xiaoxiang Hu
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, P. R. China
| | - Ning Li
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, P. R. China
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23
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Nur T, Islam MT, Alam S, Chowdhury MMU, Melo-Cavalcante AAC, de Freitas RM. Pharmacological investigations of organic crude fractions of Dysophylla auricularia. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/s13596-015-0190-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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24
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Antibacterial active compounds from Hypericum ascyron L. induce bacterial cell death through apoptosis pathway. Eur J Med Chem 2015; 96:436-44. [DOI: 10.1016/j.ejmech.2015.04.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 04/15/2015] [Indexed: 11/19/2022]
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25
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Knapp L, Amézquita A, McClure P, Stewart S, Maillard JY. Development of a protocol for predicting bacterial resistance to microbicides. Appl Environ Microbiol 2015; 81:2652-9. [PMID: 25636848 PMCID: PMC4375328 DOI: 10.1128/aem.03843-14] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 01/26/2015] [Indexed: 01/05/2023] Open
Abstract
Regulations dealing with microbicides in Europe and the United States are evolving and now require data on the risk of the development of resistance in organisms targeted by microbicidal products. There is no standard protocol to assess the risk of the development of resistance to microbicidal formulations. This study aimed to validate the use of changes in microbicide and antibiotic susceptibility as initial markers for predicting microbicide resistance and cross-resistance to antibiotics. Three industrial isolates (Pseudomonas aeruginosa, Burkholderia cepacia, and Klebsiella pneumoniae) and two Salmonella enterica serovar Typhimurium strains (SL1344 and 14028S) were exposed to a shampoo, a mouthwash, eye makeup remover, and the microbicides contained within these formulations (chlorhexidine digluconate [CHG] and benzalkonium chloride [BZC]) under realistic, in-use conditions. Baseline and postexposure data were compared. No significant increases in the MIC or the minimum bactericidal concentration (MBC) were observed for any strain after exposure to the three formulations. Increases as high as 100-fold in the MICs and MBCs of CHG and BZC for SL1344 and 14028S were observed but were unstable. Changes in antibiotic susceptibility were not clinically significant. The use of MICs and MBCs combined with antibiotic susceptibility profiling and stability testing generated reproducible data that allowed for an initial prediction of the development of resistance to microbicides. These approaches measure characteristics that are directly relevant to the concern over resistance and cross-resistance development following the use of microbicides. These are low-cost, high-throughput techniques, allowing manufacturers to provide to regulatory bodies, promptly and efficiently, data supporting an early assessment of the risk of resistance development.
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Affiliation(s)
- Laura Knapp
- Cardiff School of Pharmacy and Pharmaceutical Science, Cardiff, Wales, United Kingdom
| | - Alejandro Amézquita
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Bedford, United Kingdom
| | - Peter McClure
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Bedford, United Kingdom
| | - Sara Stewart
- Unilever Safety and Environmental Assurance Centre, Colworth Science Park, Bedford, United Kingdom
| | - Jean-Yves Maillard
- Cardiff School of Pharmacy and Pharmaceutical Science, Cardiff, Wales, United Kingdom
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26
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ANDRADE THALLITAC, LIMA SIDNEYGDE, FREITAS RIVELILSONM, ROCHA MÁRCIOS, ISLAM TOREQUL, SILVA TERESINHAGDA, MILITÃO GARDENIAC. Isolation, characterization and evaluation of antimicrobial and cytotoxic activity of estragole, obtained from the essential oil of croton zehntneri (euphorbiaceae). ACTA ACUST UNITED AC 2015; 87:173-82. [DOI: 10.1590/0001-3765201520140111] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 07/08/2014] [Indexed: 11/22/2022]
Abstract
Croton zehntneri (Euphorbiaceae) is a native aromatic plant from Northeast region of Brazil. The monoterpenoid estragole (ESL) has been isolated by classical chromatographic methods from the essential oil (EO) of C. zehnteneri leaves and characterized by GC-FID and GC-MS, its antimicrobial and cytotoxic potentials being assessed. The analysis of the EO enabled the identification of 100% of the integrated constituents, of which yield was about 1.8%. The main components identified were: eucalyptol, estragole (84.7%) and spathulenol. The dosage of 50 μg/disk of ESL presented fairly significant zones of inhibition against Gram-positive bacteria and fungi. The ESL presented toxicity against Artemia salina with LC50 and LC90 of 4,54 and 8,47 μg mL-1. However, in tumor inhibition assays (human cells), there were no rewarding inhibition in any of the human cancer cell lines (MCF-7, HEP-2 and NCI-H292).
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27
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Zablotskaya A, Segal I, Geronikaki A, Kazachonokh G, Popelis Y, Shestakova I, Nikolajeva V, Eze D. Synthesis and biological evaluation of lipid-like 5-(2-hydroxyethyl)-4-methyl-1,3-thiazole derivatives as potential anticancer and antimicrobial agents. MEDCHEMCOMM 2015. [DOI: 10.1039/c5md00140d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The observed coupling of high anticancer and antimicrobial activity for novel lipid-like compounds9,10and13based on the 5-(2-hydroxyethyl)-4-methyl-1,3-thiazole scaffold can be important as a basis for further drug development.
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Affiliation(s)
| | - Izolda Segal
- Latvian Institute of Organic Synthesis
- Riga LV-1006
- Latvia
| | - Athina Geronikaki
- School of Pharmacy
- Aristotle University of Thessaloniki
- Thessaloniki 54124
- Greece
| | | | - Yuris Popelis
- Latvian Institute of Organic Synthesis
- Riga LV-1006
- Latvia
| | | | - Vizma Nikolajeva
- Biology Department
- University of Latvia
- Kronvalda Blvd. 4
- Riga LV-1586
- Latvia
| | - Daina Eze
- Biology Department
- University of Latvia
- Kronvalda Blvd. 4
- Riga LV-1586
- Latvia
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28
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Fair RJ, Tor Y. Antibiotics and bacterial resistance in the 21st century. PERSPECTIVES IN MEDICINAL CHEMISTRY 2014; 6:25-64. [PMID: 25232278 PMCID: PMC4159373 DOI: 10.4137/pmc.s14459] [Citation(s) in RCA: 871] [Impact Index Per Article: 87.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 06/24/2014] [Accepted: 06/24/2014] [Indexed: 12/11/2022]
Abstract
Dangerous, antibiotic resistant bacteria have been observed with increasing frequency over the past several decades. In this review the factors that have been linked to this phenomenon are addressed. Profiles of bacterial species that are deemed to be particularly concerning at the present time are illustrated. Factors including economic impact, intrinsic and acquired drug resistance, morbidity and mortality rates, and means of infection are taken into account. Synchronously with the waxing of bacterial resistance there has been waning antibiotic development. The approaches that scientists are employing in the pursuit of new antibacterial agents are briefly described. The standings of established antibiotic classes as well as potentially emerging classes are assessed with an emphasis on molecules that have been clinically approved or are in advanced stages of development. Historical perspectives, mechanisms of action and resistance, spectrum of activity, and preeminent members of each class are discussed.
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Affiliation(s)
- Richard J Fair
- Department for Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Berlin, Germany
| | - Yitzhak Tor
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA
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Sharma V, Chitranshi N, Agarwal AK. Significance and biological importance of pyrimidine in the microbial world. INTERNATIONAL JOURNAL OF MEDICINAL CHEMISTRY 2014; 2014:202784. [PMID: 25383216 PMCID: PMC4207407 DOI: 10.1155/2014/202784] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Revised: 01/13/2014] [Accepted: 01/14/2014] [Indexed: 11/20/2022]
Abstract
Microbes are unique creatures that adapt to varying lifestyles and environment resistance in extreme or adverse conditions. The genetic architecture of microbe may bear a significant signature not only in the sequences position, but also in the lifestyle to which it is adapted. It becomes a challenge for the society to find new chemical entities which can treat microbial infections. The present review aims to focus on account of important chemical moiety, that is, pyrimidine and its various derivatives as antimicrobial agents. In the current studies we represent more than 200 pyrimidines as antimicrobial agents with different mono-, di-, tri-, and tetrasubstituted classes along with in vitro antimicrobial activities of pyrimidines derivatives which can facilitate the development of more potent and effective antimicrobial agents.
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Affiliation(s)
- Vinita Sharma
- School of Pharmacy, Lloyd Institute of Management & Technology, Plot. No. 11, Knowledge Park II, Greater Noida, Uttar Pradesh 201306, India
| | - Nitin Chitranshi
- Bioinformatics Centre, Biotech Park, Sector G, Jankipuram, Lucknow, Uttar Pradesh 226021, India
- Gautam Buddh Technical University, IET Campus, Sitapur Road, Lucknow, Uttar Pradesh 226021, India
| | - Ajay Kumar Agarwal
- Department of Pharmaceutical Sciences, University Institute of Pharmaceutical Sciences, Kurukshetra University, Kurukshetra, Haryana 136119, India
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Synergistic Antibacterial Activity of Capsella bursa-pastoris and Glycyrrhiza glabra Against Oral Pathogens. Jundishapur J Microbiol 2013. [DOI: 10.5812/jjm.7262] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Evaluation of combination effects of ethanolic extract of Ziziphus mucronata Willd. subsp. mucronata Willd. and antibiotics against clinically important bacteria. ScientificWorldJournal 2013; 2013:769594. [PMID: 23737727 PMCID: PMC3655675 DOI: 10.1155/2013/769594] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Accepted: 04/08/2013] [Indexed: 01/15/2023] Open
Abstract
A pragmatic approach to the treatment of infectious diseases with multicausal agents and prevention of the development of resistant isolates is the combination of herbal remedies with the first-line antimicrobial agents to which most of them have become resistant. This study evaluated the interactions between the ethanolic bark extract of Ziziphus mucronata with known antimicrobial agents in vitro. In this study, the results showed that varied zones of inhibitions (ZME-chloramphenicol (17-42 mm), ZME-amoxicillin (17-35 mm), ZME-tetracycline (17-36 mm), ZME-ciprofloxacin (20-41 mm), ZME-nalidixic acid (17-34 mm), and ZME-kanamycin (17-38 mm)) were produced by the antibacterial combinations. At the highest combined concentrations, 12 isolates (ZME-ciprofloxacin) > 10 isolates (ZME-chloramphenicol) = (ZME-kanamycin) > 6 isolates (ZME-amoxicillin) = (ZME-nalidixic acid) and 5 isolates (ZME-tetracycline) were inhibited with zones of inhibition greater than 20 ± 1.0 mm. Although the agar diffusion assay suggested that the interactions between the ethanolic extract of Z. mucronata and the antibiotics were both synergistic and additive in nature, the fractional inhibitory concentration indices (FICI) showed that the interactions were synergistic (54.17%), additive (27.78%), indifferent (16.67%), and antagonistic (1.39%). While the fractional inhibitory concentration indices (FICIs) for synergism ranged between 0.00391 and 0.5, that of additivity ranged between 0.516 and 1.0, indifferences ranged between 1.062 and 3.0 and antagonistic interaction was 5.0. The synergistic effects implied that the antibacterial combinations would be more effective and useful in the treatment of multicausal and multidrug-resistant bacteria than a single monotherapy of either antibacterial agent.
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Abstract
The shortage of new antimicrobial drugs and increasing resistance of microbe to antimicrobial agents have been of some concern. The formulation studies of new antibacterial and antifungal agents have been an active research field. Ionic liquids are known as designed liquids with controllable physical/chemical/biological properties and specific functions, which have been attracting considerable interest over recent years. However, no attention has been made towards the preparation of ionic liquids with antimicrobial activities. In this paper, a new class of ionic liquids (ILs) with fumarate anion was synthesized by neutralization of aqueous 1-butyl-3-methylimidazolium hydroxide with equimolar monoester fumarate and characterized using NMR and thermal gravimetric analysis. The ILs are soluble in water and polar organic solvents and also soluble in the common ILs. The antimicrobial activities of the ILs are more active than commercially available potassium sorbate and are greatly affected by the alkyl chain length. The significant antimicrobial properties observed in this research suggest that the ILs may have potential applications in the modern biotechnology.
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Kamal A, Murty J, Viswanath A, Sujitha P, Ganesh Kumar C. Synthesis, biological evaluation of 5-carbomethoxymethyl-7-hydroxy-2-pentylchromone, 5-carboethoxymethyl-4′,7-dihydroxyflavone and their analogues. Bioorg Med Chem Lett 2012; 22:4891-5. [DOI: 10.1016/j.bmcl.2012.05.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2012] [Revised: 04/18/2012] [Accepted: 05/02/2012] [Indexed: 11/28/2022]
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Fair RJ, Hensler ME, Thienphrapa W, Dam QN, Nizet V, Tor Y. Selectively guanidinylated aminoglycosides as antibiotics. ChemMedChem 2012; 7:1237-44. [PMID: 22639134 PMCID: PMC3383777 DOI: 10.1002/cmdc.201200150] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Indexed: 11/07/2022]
Abstract
The emergence of virulent, drug-resistant bacterial strains coupled with a minimal output of new pharmaceutical agents to combat them makes this a critical time for antibacterial research. Aminoglycosides are a well-studied, highly potent class of naturally occurring antibiotics with scaffolds amenable to modification, and therefore, they provide an excellent starting point for the development of semisynthetic, next-generation compounds. To explore the potential of this approach, we synthesized a small library of aminoglycoside derivatives selectively and minimally modified at one or two positions with a guanidine group replacing the corresponding amine or hydroxy functionality. Most guanidino-aminoglycosides showed increased affinity for the ribosomal decoding rRNA site, the cognate biological target of the natural products, when compared with their parent antibiotics, as measured by an in vitro fluorescence resonance energy transfer (FRET) A-site binding assay. Additionally, certain analogues showed improved minimum inhibitory concentration (MIC) values against resistant bacterial strains, including methicillin-resistant Staphylococcus aureus (MRSA). An amikacin derivative holds particular promise with activity greater than or equal to the parent antibiotic in the majority of bacterial strains tested.
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Affiliation(s)
- Richard J. Fair
- Department of Chemistry & Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093 (USA)
| | - Mary E. Hensler
- Department of Pediatrics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093 (USA)
| | - Wdee Thienphrapa
- Department of Pediatrics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093 (USA)
| | - Quang N. Dam
- Department of Pediatrics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093 (USA)
| | - Victor Nizet
- Department of Pediatrics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093 (USA)
| | - Yitzhak Tor
- Department of Chemistry & Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093 (USA)
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Voon HC, Bhat R, Rusul G. Flower Extracts and Their Essential Oils as Potential Antimicrobial Agents for Food Uses and Pharmaceutical Applications. Compr Rev Food Sci Food Saf 2011. [DOI: 10.1111/j.1541-4337.2011.00169.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Burian J, Ramón-García S, Sweet G, Gómez-Velasco A, Av-Gay Y, Thompson CJ. The mycobacterial transcriptional regulator whiB7 gene links redox homeostasis and intrinsic antibiotic resistance. J Biol Chem 2011; 287:299-310. [PMID: 22069311 DOI: 10.1074/jbc.m111.302588] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Intrinsic drug resistance in Mycobacterium tuberculosis limits therapeutic options for treating tuberculosis. The mycobacterial transcriptional regulator whiB7 contributes to intrinsic resistance by activating its own expression and many drug resistance genes in response to antibiotics. To investigate whiB7 activation, we constructed a GFP reporter to monitor its expression, and we used it to investigate the whiB7 promoter and to screen our custom library of almost 600 bioactive compounds, including the majority of clinical antibiotics. Results showed whiB7 was transcribed from a promoter that was conserved across mycobacteria and other actinomycetes, including an AT-rich sequence that was likely targeted by WhiB7. Expression was induced by compounds having diverse structures and targets, independent of the ability of whiB7 to mediate resistance, and was dependent on media composition. Pretreatment with whiB7 activators resulted in clinically relevant increases in intrinsic drug resistance. Antibiotic-induced transcription was synergistically increased by the reductant dithiothreitol, an effect mirrored by a whiB7-dependent shift to a highly reduced cytoplasm reflected by the ratio of reduced/oxidized mycothiol. These data provided evidence that intrinsic resistance resulting from whiB7 activation is linked to fundamental changes in cell metabolism.
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Affiliation(s)
- Ján Burian
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada; Centre for Tuberculosis Research, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada
| | - Santiago Ramón-García
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada; Centre for Tuberculosis Research, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada
| | - Gaye Sweet
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada; Centre for Tuberculosis Research, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada
| | - Anaximandro Gómez-Velasco
- Centre for Tuberculosis Research, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada; Department of Medicine, Division of Infectious Diseases, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Yossef Av-Gay
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada; Centre for Tuberculosis Research, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada; Department of Medicine, Division of Infectious Diseases, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Charles J Thompson
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada; Centre for Tuberculosis Research, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada.
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Tang Y, Corbitt TS, Parthasarathy A, Zhou Z, Schanze KS, Whitten DG. Light-induced antibacterial activity of symmetrical and asymmetrical oligophenylene ethynylenes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:4956-4962. [PMID: 21405044 DOI: 10.1021/la105018g] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The light-induced antibacterial activity of symmetric and asymmetric oligophenylene ethynylenes (OPEs) was investigated against Gram-positive (Staphylococcus aureus and Staphylococcus epidermidis) and Gram-negative (Escherichia coli) bacteria. To understand the light-induced biocidal effect better, the transient absorption and triplet lifetime of OPEs were studied in methanol and water. A higher triplet lifetime was observed for OPE samples in water than in methanol. The magnitudes of the changes in optical density (ΔOD) of the S-OPE-n(H) series of symmetric oligomers are much higher than that of the asymmetric OPE-n series in water and are generally correlated with the singlet oxygen yield. It was found that the antibacterial activity against both Gram-positive and Gram-negative bacteria is size-, concentration-, and time-dependent. The light-induced antibacterial activity may result from the coordinated interactions of membrane disruption and interfacial or intracellular singlet oxygen generation, and the dominant factor is most likely the latter. The results obtained in this study will aid in the design of more efficient biocides in the future.
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Affiliation(s)
- Yanli Tang
- Center for Biomedical Engineering, Department of Chemical and Nuclear Engineering, 1 University of New Mexico, MSC01 1141, Albuquerque, New Mexico 87131-0001, USA
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Baldovino S, Rojas J, Rojas LB, Lucena M, Buitrago A, Morales A. Chemical Composition and Antibacterial Activity of the Essential Oil of Monticalia andicola (Asteraceae) Collected in Venezuela. Nat Prod Commun 2009. [DOI: 10.1177/1934578x0900401129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The essential oil from the leaves of Monticalia andicola Turcz., collected in November 2008, was analyzed by GC/MS. A yield of 0.15% oil was obtained by hydrodistillation. Thirty-six components were identified by comparison of their mass spectra with those in the Wiley GC-MS Library data base. The major components were α-pinene (19.6%), β-pinene (10.5%), α-longipinene (6.5%), δ-3-carene (6.2%), cyperene (5.4%) and β-phellandrene (5.2%). The antibacterial activity of the essential oil was evaluated against Gram- positive (Staphylococcus aureus ATCC 25923, Enterococcus faecalis ATCC 29212) and Gram-negative (Escherichia coli ATCC 25992, Klebsiella pneumoniae ATCC 23357, Pseudomonas aeruginosa ATCC 27853) bacteria, using the disc diffusion agar method. The results showed a broad spectrum of activity with minimal inhibitory concentration (MIC) values ranging from 10 to150 μg/mL.
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Affiliation(s)
- Shirley Baldovino
- Organic Biomolecular Research Group, Research Institute, Faculty of Pharmacy and Biomedical Sciences, University of Los Andes, Mérida, Venezuela
| | - Janne Rojas
- Organic Biomolecular Research Group, Research Institute, Faculty of Pharmacy and Biomedical Sciences, University of Los Andes, Mérida, Venezuela
| | - Luis B. Rojas
- Organic Biomolecular Research Group, Research Institute, Faculty of Pharmacy and Biomedical Sciences, University of Los Andes, Mérida, Venezuela
| | - María Lucena
- Clinical Bioanalysis Department, Faculty of Pharmacy and Biomedical Sciences, University of Los Andes, Mérida, Venezuela
| | - Alexis Buitrago
- Organic Biomolecular Research Group, Research Institute, Faculty of Pharmacy and Biomedical Sciences, University of Los Andes, Mérida, Venezuela
| | - Antonio Morales
- Organic Biomolecular Research Group, Research Institute, Faculty of Pharmacy and Biomedical Sciences, University of Los Andes, Mérida, Venezuela
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Jiang H, Hu JR, Zhan WQ, Liu X. Screening for fractions of Oxytropis falcata Bunge with antibacterial activity. Nat Prod Res 2009; 23:953-9. [PMID: 19521909 DOI: 10.1080/14786410902906934] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Preliminary studies with the four extracts of Oxytropis falcate Bunge exhibited that the chloroform and ethyl acetate extracts showed stronger antibacterial activities against the nine tested Gram-positive and Gram-negative bacteria. The HPLC-scanned and bioassay-guided fractionation led to the isolation and identification of the main flavonoid compounds, i.e. rhamnocitrin, kaempferol, rhamnetin, 2',4'-dihydroxychalcone and 2',4',beta-trihydroxy-dihydrochalcon. Except 2',4',beta-trihydroxy-dihydrochalcon, four other compounds had good antibacterial activities. The minimal inhibitory concentrations (MICs) and minimal bactericidal concentrations (MBCs) of the four compounds ranged between 125 and 515 microg mL(-1). Staphylococcus aureus was the most susceptible to these compounds, with MIC and MBC values from 125 to 130 microg mL(-1). This is the first report of antibacterial activity in O. falcate Bunge. In this study, evidence to evaluate the biological functions of O. falcate Bunge is provided, which promote the rational use of this herb.
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Affiliation(s)
- H Jiang
- Gansu Academy of Traditional Chinese Medicine, Lanzhou 730050, China.
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Aryal S, Prabaharan M, Pilla S, Gong S. Biodegradable and biocompatible multi-arm star amphiphilic block copolymer as a carrier for hydrophobic drug delivery. Int J Biol Macromol 2009; 44:346-52. [PMID: 19428465 DOI: 10.1016/j.ijbiomac.2009.01.007] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2009] [Revised: 01/25/2009] [Accepted: 01/29/2009] [Indexed: 11/15/2022]
Abstract
Multi-arm star amphiphilic block copolymers (SABCs) with approximately 32 arms were synthesized and characterized for drug delivery applications. A hyperbranched polyester, boltorn H40 (H40), was used as the macroinitiator for the ring-opening polymerization of epsilon-caprolactone (epsilon-CL). The resulting multi-arm H40-poly(epsilon-caprolactone) (H40-PCL-OH) was further reacted with carboxyl terminated methoxy poly(ethylene glycol) (MPEG-COOH) to form H40-PCL-b-MPEG copolymers. The resulting SABCs were characterized by (1)H NMR spectroscopy and gel permeation chromatography (GPC). The critical aggregation concentration (CAC) of H40-PCL-b-MPEG was 3.8 mg/L as determined by fluorescence spectrophotometry. Below the CAC, stable unimolecular micelles were formed with an average diameter of 18 nm as measured by TEM. Above the CAC, unimolecular micelles exhibited agglomeration with an average diameter of 98 nm. The hydrodynamic diameter of these agglomerates was found to be 122 nm, as measured by dynamic light scattering (DLS). The drug loading efficacy of the H40-PCL-b-MPEG micelles was 26 wt%. Drug release study showed an initial burst followed by a sustained release of the entrapped hydrophobic model drug, 5-fluorouracil, over a period of 9-140 h. These results indicate that the H40-PCL-b-MPEG micelles have great potential as hydrophobic drug delivery carriers.
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Affiliation(s)
- Santosh Aryal
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA
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Struga M, Kossakowski J, Stefańska J, Zimniak A, Koziol AE. Synthesis and antibacterial activity of bis-[2-hydroxy-3-(1,7,8,9,10-pentamethyl-3,5-dioxo-4-aza-tricyclo[5.2.1.02,6]dec-8-en-4-yloxy)-propyl]-dimethyl-ammonium chloride. Eur J Med Chem 2008; 43:1309-14. [DOI: 10.1016/j.ejmech.2007.08.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2007] [Revised: 07/25/2007] [Accepted: 08/09/2007] [Indexed: 11/16/2022]
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Soberón JR, Sgariglia MA, Sampietro DA, Quiroga EN, Vattuone MA. Antibacterial activity of plant extracts from northwestern Argentina. J Appl Microbiol 2007; 102:1450-61. [PMID: 17578409 DOI: 10.1111/j.1365-2672.2006.03229.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
AIMS To determine the antibacterial and cytotoxic activities of aqueous and ethanolic extracts of northwestern Argentinian plants used in folk medicine. To compare the mentioned activities with those of five commercial antibiotics. To identify the compounds responsible for the antibacterial activity. METHODS AND RESULTS Plant extracts were prepared according to traditional uses in northwestern Argentina. Antibacterial activity was assayed by agar dilution in Petri dishes and broth dilution in 96-well plates. Lethal dose 50 (LD(50)) was determined by the Artemia salina assay. Phytochemical analysis was performed by sample adsorption on silica gel, thin-layer chromatography (TLC), bioautography and UV-visible spectra. The results showed that Tripodanthus acutifolius aqueous extracts have lower minimal inhibitory concentrations (MIC) (502 and 506 microg of extracted material (EM) per ml for infusion and decoction, respectively) than cefotaxim MIC (640 microg ml(-1)) against Acinetobacterfreundii (303). These data were lower than their LD(50). Tripodanthus acutifolius tincture showed lower MIC (110 microg of EM per ml) and minimal bactericidal concentration (MBC) (220 microg of EM per ml) than cefotaxim (MIC and MBC of 320 microg ml(-1)) for Pseudomonasaeruginosa. This extract also showed a MIC/MBC of 110/220 microg of EM per ml, lower than oxacillin (MIC/MBC of 160/220 microg ml(-1)) for Staphylococcus aureus (ATCC 25923). The cytotoxicity of all extracts were compared with that of commercial antibiotics. Rutin (3,3',4',5,7-pentahydroxyflavone 3-beta-rhamnosilglucoside), iso-quercitrin (3,3',4',5,7-pentahydroxyflavone 3-beta-glucoside) and a terpene would be partially responsible for the antibacterial activity of T. acutifolius infusion. CONCLUSIONS Tripodanthus acutifolius extracts had the ability to inhibit bacterial growth. The antibacterial activity differs with the applied extractive method, and it could be partially attributed to glycoflavonoids. This paper contributes to the knowledge of antibacterial capacity of plants from northwestern Argentina. SIGNIFICANCE AND IMPACT OF THE STUDY These antibacterial activities support further studies to discover new chemical structures that can contribute to alleviate or cure some illnesses.
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Affiliation(s)
- J R Soberón
- Cátedra de Fitoquímica, Instituto de Estudios Vegetales Dr. A.R. Sampietro, Facultad de Bioquímica, Química y Farmacia Universidad Nacional de Tucumán Ayacucho 471 (4000) San Miguel de Tucumán, Argentina
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Radulović N, Stankov-Jovanović V, Stojanović G, Šmelcerović A, Spiteller M, Asakawa Y. Screening of in vitro antimicrobial and antioxidant activity of nine Hypericum species from the Balkans. Food Chem 2007. [DOI: 10.1016/j.foodchem.2006.05.062] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zampini IC, Vattuone MA, Isla MI. Antibacterial activity of Zuccagnia punctata Cav. ethanolic extracts. JOURNAL OF ETHNOPHARMACOLOGY 2005; 102:450-6. [PMID: 16137849 DOI: 10.1016/j.jep.2005.07.005] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2004] [Revised: 07/13/2005] [Accepted: 07/19/2005] [Indexed: 05/04/2023]
Abstract
The present study was conducted to investigate antibacterial activity of Zuccagnia punctata ethanolic extract against 47 strains of antibiotic-resistant Gram-negative bacteria and to identify bioactive compounds. Inhibition of bacterial growth was investigated using agar diffusion, agar macrodilution, broth microdilution and bioautographic methods. Zuccagnia punctata extract was active against all assayed bacteria (Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Enterobacter cloacae, Serratia marcescens, Morganella morganii, Acinetobacter baumannii, Pseudomonas aeruginosa, Stenotrophomonas maltophilia) with minimal inhibitory concentration (MIC) values ranging from 25 to 200 microg/mL. Minimal bactericidal concentration (MBC) values were identical or two-fold higher than the corresponding MIC values. Contact bioautography, indicated that Zuccagnia punctata extracts possess one major antibacterial component against Pseudomonas aeruginosa and at least three components against. Klebsiella pneumoniae and Escherichia coli. Activity-guided fractionation of 1he ethanol extract on a silica gel column yielded a compound (2',4'-dihydroxychalcone), which exhibited strong antibacterial activity with MIC values between 0.10 and 1.00 microg/mL for Proteus mirabilis, Enterobacter cloacae, Serratia marcescens, Morganella morganii, Acinetobacter baumannii, Pseudomonas aeruginosa, Stenotrophomonas maltophilia. These values are lower than imipenem (0.25-16 microg/mL). Zuccagnia punctata might provide promising therapeutic agents against infections with multi-resistant Gram-negative bacteria.
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Affiliation(s)
- Iris C Zampini
- Cátedra de Fitoquimíca, Instituto de Estudios Vegetales Dr. Antonio R. Sampietro, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Miguel de Tucumán, Argentina
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Abstract
Flavonoids are ubiquitous in photosynthesising cells and are commonly found in fruit, vegetables, nuts, seeds, stems, flowers, tea, wine, propolis and honey. For centuries, preparations containing these compounds as the principal physiologically active constituents have been used to treat human diseases. Increasingly, this class of natural products is becoming the subject of anti-infective research, and many groups have isolated and identified the structures of flavonoids possessing antifungal, antiviral and antibacterial activity. Moreover, several groups have demonstrated synergy between active flavonoids as well as between flavonoids and existing chemotherapeutics. Reports of activity in the field of antibacterial flavonoid research are widely conflicting, probably owing to inter- and intra-assay variation in susceptibility testing. However, several high-quality investigations have examined the relationship between flavonoid structure and antibacterial activity and these are in close agreement. In addition, numerous research groups have sought to elucidate the antibacterial mechanisms of action of selected flavonoids. The activity of quercetin, for example, has been at least partially attributed to inhibition of DNA gyrase. It has also been proposed that sophoraflavone G and (-)-epigallocatechin gallate inhibit cytoplasmic membrane function, and that licochalcones A and C inhibit energy metabolism. Other flavonoids whose mechanisms of action have been investigated include robinetin, myricetin, apigenin, rutin, galangin, 2,4,2'-trihydroxy-5'-methylchalcone and lonchocarpol A. These compounds represent novel leads, and future studies may allow the development of a pharmacologically acceptable antimicrobial agent or class of agents.
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Bonjar S. Evaluation of antibacterial properties of some medicinal plants used in Iran. JOURNAL OF ETHNOPHARMACOLOGY 2004; 94:301-305. [PMID: 15325735 DOI: 10.1016/j.jep.2004.06.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2003] [Revised: 03/31/2004] [Accepted: 06/02/2004] [Indexed: 05/24/2023]
Abstract
Forty-five species of 29 plant families used in the traditional medicine by Iranian people, showed antibacterial activities against one or more of the bacterial species: Bacillus cereus, Bacillus pumilus, Bordetella bronchiseptica, Escherichia coli, Klebsiella pneumoniae, Micrococcus luteus, Pseudomonas aeruginosa, Pseudomonas fluorescens, Serratia marcescens, Staphylococcus aureus and Staphylococcus epidermidis. No plant showed activity against Serratia marcescens; Bordetella bronchiseptica being the most susceptible species. All extracts showed the same activity 18 months later.
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Affiliation(s)
- Shahidi Bonjar
- Department of Plant Pathology, College of Agricultural Sciences, Bahonar University of Kerman, Iran.
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Abstract
Multiresistance in Gram-negative pathogens, particularly Pseudomonas aeruginosa, Stenotrophomonas maltophilia, Acinetobacter spp. and the Enterobacteriaceae, is a significant problem in medicine today. While multiple mechanisms often contribute to multiresistance, a broadly distributed family of three-component multidrug efflux systems is an increasingly recognised determinant of both intrinsic and acquired multiresistance in these organisms. Homologues of these efflux systems are also readily identifiable in the genome sequences of a wide range of Gram-negative organisms, pathogens and non-pathogens alike, where they probably promote efflux-mediated resistance to multiple antimicrobials. Significantly, these systems often accommodate biocides, raising the spectre of biocide-mediated selection of multiresistance in Gram-negative pathogens. While there is some debate as to the natural function of these efflux systems, only some of which are inducible by their antimicrobial substrates, their contribution to resistance in a variety of pathogens nonetheless makes them reasonable targets for therapeutic intervention. Indeed, given the incredible chemical diversity of substrates accommodated by these efflux systems, it is likely that many novel or yet to be discovered antimicrobials will themselves be efflux substrates and, as such, efflux inhibitors may become an important component of Gram-negative antimicrobial therapy.
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Affiliation(s)
- K Poole
- Department of Microbiology and Immunology, Queen's University, Kingston, Ontario, Canada K7L 3N6.
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Bonjar GS. Evaluation of Antibacterial Properties of Iranian Medicinal-Plants against Micrococcus luteus, Serratia marcescens, Klebsiella pneumoniae and Bordetella bronchoseptica. ACTA ACUST UNITED AC 2003. [DOI: 10.3923/ajps.2004.82.86] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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References. Antibiotics (Basel) 2003. [DOI: 10.1128/9781555817886.refs] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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