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Waen-Ngoen T, Wunnoo S, Nwabor OF, Bilhman S, Dumjun K, Ongarj J, Pinpathomrat N, Lethongkam S, Voravuthikunchai SP, Paosen S. Effectiveness of plant-based hand sanitizer incorporating Quercus infectoria gall extract. J Appl Microbiol 2023; 134:lxad295. [PMID: 38049377 DOI: 10.1093/jambio/lxad295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/20/2023] [Accepted: 12/03/2023] [Indexed: 12/06/2023]
Abstract
AIMS Quercus infectoria (Qi), a traditional herbal plant with a broad spectrum of activities on multidrug-resistant bacteria, has been developed for hand sanitizer applications. METHODS AND RESULTS Antimicrobial activity was evaluated using agar-well diffusion and broth microdilution method. Bactericidal activity was determined following the European Standard 1276 antibacterial suspension test. Neutralization assay was performed to assess antirespiratory syncytial virus. Safety, stability, and skin permeation of Qi hand gel was investigated. Qi hand sanitizer gel inhibited microorganisms ranging from 99.9% to 99.999% against Enterococcus faecalis, Staphylococcus aureus, methicillin-resistant Staph. aureus, Staph. epidermidis, Staph. pseudintermedius, Staph. saprophyticus, Streptococcus pyogenes, Acinetobacter baumannii, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Candida albicans. A significant reduction in main human dermatophytes including Microsporum canis, M. gypseum, and Talaromyces marneffei of ∼50% was observed (P < .05). Qi hand sanitizer gel inactivated >99% viral particles entering human laryngeal epidermoid carcinoma cells in a dose-dependent manner. Scanning electron micrographs further illustrated that Qi hand sanitizer gel disrupted microbial cell membrane after 1-min contact time resulting in cell death. Qi hand sanitizer gel delivered emollient compounds through simulated human skin layers and showed no cytotoxicity on fibroblast cells. Moreover, Qi hand sanitizer gel demonstrated stability under extreme conditions. CONCLUSIONS Qi hand sanitizer gel was able to inhibit various microorganisms including bacteria, dermatophytes, and virus.
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Affiliation(s)
- Tassanai Waen-Ngoen
- Science for Industry Program, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Center of Antimicrobial Biomaterial Innovation-Southeast Asia, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Suttiwan Wunnoo
- Center of Antimicrobial Biomaterial Innovation-Southeast Asia, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Ozioma Forstinus Nwabor
- Center of Antimicrobial Biomaterial Innovation-Southeast Asia, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Siwaporn Bilhman
- Center of Antimicrobial Biomaterial Innovation-Southeast Asia, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Krittima Dumjun
- Science for Industry Program, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Center of Antimicrobial Biomaterial Innovation-Southeast Asia, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Jomkwan Ongarj
- Department of Biomedical Sciences and Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Nawamin Pinpathomrat
- Department of Biomedical Sciences and Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Sakkarin Lethongkam
- Center of Antimicrobial Biomaterial Innovation-Southeast Asia, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Supayang Piyawan Voravuthikunchai
- Science for Industry Program, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Center of Antimicrobial Biomaterial Innovation-Southeast Asia, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Supakit Paosen
- Science for Industry Program, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Center of Antimicrobial Biomaterial Innovation-Southeast Asia, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
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Banc R, Rusu ME, Filip L, Popa DS. Phytochemical Profiling and Biological Activities of Quercus sp. Galls (Oak Galls): A Systematic Review of Studies Published in the Last 5 Years. PLANTS (BASEL, SWITZERLAND) 2023; 12:3873. [PMID: 38005770 PMCID: PMC10674842 DOI: 10.3390/plants12223873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 11/12/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023]
Abstract
Quercus species have been widely used in traditional medicine, and recently, researchers' attention has focused on galls of the genus Quercus as a source of health-promoting phytochemicals. This review presents a summary of the most recent findings on the phytochemistry and bioactivity of oak galls, following the screening of scientific papers published in two relevant databases, PubMed and Embase, between January 2018 and June 2023. The oak galls are rich in active compounds, mostly gallotannins and phenolic acids. Due to these secondary metabolites, the reviewed studies have demonstrated a wide range of biological activities, including antioxidant and anti-inflammatory actions, antimicrobial properties, tissue-protective effects, and antitumor, anti-aging, and hypoglycemic potential. Thus, oak galls are a promising natural matrix, to be considered in obtaining pharmaceutical and cosmetic preparations used in anti-aging strategies and, together with medications, in the management of age-related diseases. In further evaluations, the valuable functional properties of oak galls, reported mostly in preclinical studies, should be confirmed with clinical studies that would also take into account the potential health risks of their use.
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Affiliation(s)
- Roxana Banc
- Department of Bromatology, Hygiene, Nutrition, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 6 Pasteur Street, 400349 Cluj-Napoca, Romania; (R.B.); (L.F.)
| | - Marius Emil Rusu
- Department of Pharmaceutical Technology and Biopharmaceutics, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 12 Ion Creangǎ Street, 400010 Cluj-Napoca, Romania
| | - Lorena Filip
- Department of Bromatology, Hygiene, Nutrition, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 6 Pasteur Street, 400349 Cluj-Napoca, Romania; (R.B.); (L.F.)
| | - Daniela-Saveta Popa
- Department of Toxicology, Faculty of Pharmacy, “Iuliu Hațieganu” University of Medicine and Pharmacy, 6 Pasteur Street, 400349 Cluj-Napoca, Romania;
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Chen P, Liu Y, Li C, Hua S, Sun C, Huang L. Antibacterial mechanism of vanillin against Escherichia coli O157: H7. Heliyon 2023; 9:e19280. [PMID: 37662745 PMCID: PMC10474422 DOI: 10.1016/j.heliyon.2023.e19280] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 08/14/2023] [Accepted: 08/17/2023] [Indexed: 09/05/2023] Open
Abstract
Vanillin, a plant-derived antimicrobial volatile substance, has potential microbial control applications in the food industry. However, the effect of vanillin on the food-borne pathogen Escherichia coli (E. coli) O157:H7 has not been well studied. This study aims to explore the antibacterial mechanism of vanillin against E. coli O157:H7. The minimum inhibitory concentration (MIC) and antibacterial effect of vanillin were determined by microdilution. Scanning electron microscopy (SEM) was used to observe the damage of vanillin to the cell membrane, while cell membrane potential and the leakage of nucleic acid protein were measured to explore the effect of vanillin on the membrane system. Confocal laser scanning and intracellular adenosine triphosphate (ATP) concentration determination were utilized to investigate the effects of vanillin on the energy, life, and death of E. coli. Finally, transcriptome sequencing was conducted to investigate the gene expression differences induced by vanillin treatment. The results showed that vanillin treatment effectively controlled E. coli O157:H7 with an MIC of 2 mg/mL. After treatment, damage to the membrane system, depolarization of the membrane, and leakage of nucleic acid and protein were observed. Meanwhile, vanillin treatment caused decreased ATP content and cell death. Transcriptome analysis showed that vanillin treatment significantly affected the expression of genes involved in cell membrane formation, tricarboxylic acid (TCA) cycling pathway, and oxidative phosphorylation pathway in E. coli O157:H7. In conclusion, membrane damage and energy metabolism disruption are important mechanisms of vanillin's inhibitory effect on E. coli O157:H7. This study provides new insights into the molecular reaction mechanism of vanillin against E. coli O157:H7, highlighting its potential as an antibacterial substance for preventing E. coli contamination in the food industry.
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Affiliation(s)
- Peiyao Chen
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Yinxin Liu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Cheng Li
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Shuhao Hua
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Cui Sun
- Laboratory of Fruit Quality Biology/The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Lingxia Huang
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China
- Key Laboratory of Silkworm and Bee Resource Utilization and Innovation Zhejiang University, Hangzhou 310058, PR China
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Sherif MM, Elshikh HH, Abdel-Aziz MM, Elaasser MM, Yosri M. In Vitro Antibacterial and Phytochemical Screening of Hypericum perforatum Extract as Potential Antimicrobial Agents against Multi-Drug-Resistant (MDR) Strains of Clinical Origin. BIOMED RESEARCH INTERNATIONAL 2023; 2023:6934398. [PMID: 37090192 PMCID: PMC10121355 DOI: 10.1155/2023/6934398] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/20/2023] [Accepted: 02/20/2023] [Indexed: 04/25/2023]
Abstract
Background The perennial plant Hypericum perforatum is widely distributed around the world. It has been used for many years in conventional medicine to treat a variety of illnesses, including stress, mild to moderate depression, and minor injuries. This study examined the antimicrobial activity of the H. perforatum total extract and its fractions (n-hexane, ethyl acetate, chloroform, and aqueous) against multi-drug-resistant (MDR) isolates that were gathered from clinical samples, including methicillin-resistant Staphylococcus aureus (MRSA), Enterococcus faecalis, Escherichia coli, and Klebsiella pneumonia. Materials and Methods Aerial parts of H. perforatum were collected and extracted using various solvents and were tested versus different isolated bacterial species. The inhibition zone of tested extracts was detected using an agar diffusion assay, and MICs were measured. Phytochemical analysis of promising H. perforatum extract was done using LC-ESI-MS/MS. Ultrastructure examination for the most altered bacteria used transmission electron microscopy. Antioxidant assays were done using DPPH and ABTS scavenging capacity methods. Cytotoxicity was reported versus Vero cells. Results Different extracts of H. perforatum showed promising antibacterial activity against the pathogens. While the subfractions of the total extract were observed to show lesser inhibition zones and higher MIC values than the total extract of H. perforatum against MDR strains, the total extract of H. perforatum demonstrated the most potent antimicrobial action with an inhibition zone range of 17.9-27.9 mm. MDR-K. pneumoniae was discovered to be the most susceptible strain, which is consistent with the antibacterial inhibitory action of H. perforatum whole extract. Additionally, after treatment at the minimum inhibitory concentration (MIC 3.9 μg/ml), the transmission electron microscope showed alterations in the ultrastructure of the K. pneumoniae cells. Methanol extract from H. perforatum has a CC50 value of 976.75 μg/ml. Conclusion Future inhibitors that target MDR strains may be revealed by these findings. Additionally, the extracts that were put to the test demonstrated strong antioxidant effects as shown by DPPH or ABTS radical-scavenging assays.
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Affiliation(s)
- Momen M. Sherif
- Department of Microbiology, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11841, Egypt
| | - Hussien H. Elshikh
- Department of Microbiology, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11841, Egypt
- The Regional Center for Mycology and Biotechnology, Al-Azhar University, 11787 Nasr City, Cairo, Egypt
| | - Marwa M. Abdel-Aziz
- The Regional Center for Mycology and Biotechnology, Al-Azhar University, 11787 Nasr City, Cairo, Egypt
| | - Mahmoud M. Elaasser
- The Regional Center for Mycology and Biotechnology, Al-Azhar University, 11787 Nasr City, Cairo, Egypt
| | - Mohammed Yosri
- The Regional Center for Mycology and Biotechnology, Al-Azhar University, 11787 Nasr City, Cairo, Egypt
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5
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Wan Nor Amilah WAW, Ahmad Najib M, Noor Izani NJ, Arizam MF. Antimicrobial Activities of Quercus infectoria Gall Extracts: A Scoping Review. J Herb Med 2022. [DOI: 10.1016/j.hermed.2022.100543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Elham A, Arken M, Kalimanjan G, Arkin A, Iminjan M. A review of the phytochemical, pharmacological, pharmacokinetic, and toxicological evaluation of Quercus Infectoria galls. JOURNAL OF ETHNOPHARMACOLOGY 2021; 273:113592. [PMID: 33217520 DOI: 10.1016/j.jep.2020.113592] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 11/11/2020] [Accepted: 11/12/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Quercus Infectoria galls (QIG) have a long history of use in traditional Chinese medicine and traditional Uyghur medicine for the treatment of diarrhea, hemorrhage, skin disease, and many other human ailments. Medicinal applications of QIG have become increasingly popular in Greece, Asia Minor, Syria, and Iran. AIM OF THE REVIEW The present paper reviewed the ethnopharmacology, phytochemistry, analytical methods, biological activities, metabolism, pharmacokinetics, toxicology, and drug interactions of QIG to assess the ethnopharmacological uses, explore its therapeutic potential, and identify future opportunities for research. MATERIALS AND METHODS Information on QIG was gathered via the Internet (using Google Scholar, Baidu Scholar, Elsevier, ACS, Pubmed, Web of Science, CNKI, and EMBASE) and libraries. Additionally, information was also obtained from local books and PhD and MS dissertations. RESULTS QIG has played an important role in traditional Chinese medicine. The main bioactive metabolites of QIG include tannins, phenolic acids, flavonoids, triterpenoids, and steroids. Scientific studies on the QIG extract and its components have shown its wide range of pharmacological activities, such as cholinesterase- and monoamine oxidase-inhibitory, antitumor, anti-hypertension, antidiabetic, antimicrobial, insecticidal, antiparasitic, antioxidant, and anti-inflammatory. CONCLUSIONS The ethnopharmacological, phytochemical, pharmacological, and analytical methods of QIG were highlighted in this review, which provides information for future studies and commercial exploration. QIG has a huge potential for pharmaceutical and nutraceutical applications. Moreover, comprehensive toxicity studies of this plant must be conducted to ensure its safety. Additional investigations are recommended to transmute the ethnopharmacological claims of this plant in folklore medicines into scientific rationale-based information. Research on pharmacokinetics studies and potential drug interactions with standard-of-care medications is still limited, which calls for additional studies particularly on humans. Further assessments and clinical trials should be performed before it can be integrated into medicinal practices.
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Affiliation(s)
- Aliya Elham
- Dept. of Pharmaceutics and Physical Chemistry, College of Pharmacy, Xinjiang Medical University, Urumqi, 830011, China
| | - Miradel Arken
- Emergency Trauma Center, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang Medical University, Urumqi, China
| | - Gulina Kalimanjan
- Dept. of Pharmaceutics and Physical Chemistry, College of Pharmacy, Xinjiang Medical University, Urumqi, 830011, China
| | - Abdulaziz Arkin
- Dept. of Pharmaceutics and Physical Chemistry, College of Pharmacy, Xinjiang Medical University, Urumqi, 830011, China
| | - Mubarak Iminjan
- Dept. of Pharmaceutics and Physical Chemistry, College of Pharmacy, Xinjiang Medical University, Urumqi, 830011, China.
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The Phytochemical Analysis of Vinca L. Species Leaf Extracts Is Correlated with the Antioxidant, Antibacterial, and Antitumor Effects. Molecules 2021; 26:molecules26103040. [PMID: 34069720 PMCID: PMC8160922 DOI: 10.3390/molecules26103040] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/14/2021] [Accepted: 05/16/2021] [Indexed: 11/30/2022] Open
Abstract
The phytochemical analysis of Vinca minor, V. herbacea, V. major, and V. major var. variegata leaf extracts showed species-dependent antioxidant, antibacterial, and cytotoxic effects correlated with the identified phytoconstituents. Vincamine was present in V. minor, V. major, and V. major var. variegata, while V. minor had the richest alkaloid content, followed by V. herbacea. V. major var. variegata was richest in flavonoids and the highest total phenolic content was found in V. herbacea which also had elevated levels of rutin. Consequently, V. herbacea had the highest antioxidant activity followed by V. major var. variegata. Whereas, the lowest one was of V. major. The V. minor extract showed the most efficient inhibitory effect against both Staphylococcusaureus and E. coli. On the other hand, V. herbacea had a good anti-bacterial potential only against S. aureus, which was most affected at morphological levels, as indicated by scanning electron microscopy. The Vinca extracts acted in a dose-depended manner against HaCaT keratinocytes and A375 melanoma cells and moreover, with effects on the ultrastructure, nitric oxide concentration, and lactate dehydrogenase release. Therefore, the Vinca species could be exploited further for the development of alternative treatments in bacterial infections or as anticancer adjuvants.
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Abdel-Aziz MM, Elella MHA, Mohamed RR. Green synthesis of quaternized chitosan/silver nanocomposites for targeting mycobacterium tuberculosis and lung carcinoma cells (A-549). Int J Biol Macromol 2019; 142:244-253. [PMID: 31690471 DOI: 10.1016/j.ijbiomac.2019.09.096] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/24/2019] [Accepted: 09/13/2019] [Indexed: 01/06/2023]
Abstract
Lung cancer (LC) is the most-deadly type of cancer representing a major public health problem worldwide. Tuberculosis TB is another infectious disease influencing lungs that causes death especially in developing countries. The present study is the first to report antimycobacterial activity of TMC/Ag nanocomposite. It aims to solve the case of lung cancer and its most associative pathogen. The current study reports one pot green biosynthesis of silver nanocomposite in presence of biodegradable biopolymer (N,N,N-trimethyl chitosan chloride, TMC) as both reducing and stabilizing agent. The structure of TMC/Ag nanocomposite was characterized with different analysis tools including TEM, XRD and UV-vis spectrophotometer techniques. TEM images showed that Ag nanoparticles were well distributed spheres and their diameter ranged from 11 to17.5 nm. While, XRD pattern of TMC/Ag nanocomposite showed diffraction peaks related to the crystalline nature of Ag nanoparticles. In addition, UV-vis spectrum revealed a broad absorption peak at 400 nm attributing to the surface Plasmon resonance (SPR) of Ag. TMC/Ag nanocomposite exhibited a promising in vitro antimycobacterial activity with MIC of 1.95 μg/mL. On the other hand, The antitumor activity results of nanocomposites against both lung carcinoma cells (A-549) and normal lung cells (WI 38) revealed that nanocomposite cytotoxicity against A-549 cells with IC50 of 12.3 μg/mL, whereas the IC50 value against normal WI 38 cells was 357.2 μg/mL.
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Affiliation(s)
- Marwa M Abdel-Aziz
- Regional Center for Mycology and Biotechnology, Al-Azhar University, Cairo 11651, Egypt.
| | | | - Riham R Mohamed
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt.
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Bernal‐Mercado A, Gutierrez‐Pacheco MM, Encinas‐Basurto D, Mata‐Haro V, Lopez‐Zavala A, Islas‐Osuna M, Gonzalez‐Aguilar G, Ayala‐Zavala J. Synergistic mode of action of catechin, vanillic and protocatechuic acids to inhibit the adhesion of uropathogenic
Escherichia coli
on silicone surfaces. J Appl Microbiol 2019; 128:387-400. [DOI: 10.1111/jam.14472] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 09/18/2019] [Accepted: 09/29/2019] [Indexed: 12/19/2022]
Affiliation(s)
- A.T. Bernal‐Mercado
- Coordinacion de Tecnologia de Alimentos de Origen Vegetal Centro de Investigacion en Alimentacion y Desarrollo A.C. Hermosillo Sonora Mexico
| | - M. Melissa Gutierrez‐Pacheco
- Coordinacion de Tecnologia de Alimentos de Origen Vegetal Centro de Investigacion en Alimentacion y Desarrollo A.C. Hermosillo Sonora Mexico
| | - D. Encinas‐Basurto
- Departamento de Fisica. Posgrado en Nanotecnología Universidad de Sonora Hermosillo Sonora Mexico
| | - V. Mata‐Haro
- Coordinacion de Ciencia de los Alimentos Centro de Investigacion en Alimentacion y Desarrollo A.C. Hermosillo Sonora Mexico
| | - A.A. Lopez‐Zavala
- Departamento de Ciencias Químico Biologicas Universidad de Sonora Hermosillo Sonora Mexico
| | - M.A. Islas‐Osuna
- Coordinacion de Tecnologia de Alimentos de Origen Vegetal Centro de Investigacion en Alimentacion y Desarrollo A.C. Hermosillo Sonora Mexico
| | - G.A. Gonzalez‐Aguilar
- Coordinacion de Tecnologia de Alimentos de Origen Vegetal Centro de Investigacion en Alimentacion y Desarrollo A.C. Hermosillo Sonora Mexico
| | - J.F. Ayala‐Zavala
- Coordinacion de Tecnologia de Alimentos de Origen Vegetal Centro de Investigacion en Alimentacion y Desarrollo A.C. Hermosillo Sonora Mexico
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Limsuwan S, Moosigapong K, Jarukitsakul S, Joycharat N, Chusri S, Jaisamut P, Voravuthikunchai SP. Lupinifolin from Albizia myriophylla wood: A study on its antibacterial mechanisms against cariogenic Streptococcus mutans. Arch Oral Biol 2017; 93:195-202. [PMID: 29102025 DOI: 10.1016/j.archoralbio.2017.10.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 10/16/2017] [Accepted: 10/16/2017] [Indexed: 12/17/2022]
Abstract
OBJECTIVE To determine the anti-Streptococcus mutans mechanisms of action of lupinifolin from Albizia myriophylla Benth. (Fabaceae) wood and provide scientific evidence to support the traditional use of the plant against dental caries. METHODS The minimum inhibitory concentration (MIC) was evaluated using the broth micro-dilution method. The effects of lupinifolin on bactericidal activity, bacterial cell walls, and membranes were investigated by time-kill, lysis, and leakage assays, respectively. Electron microscopy was utilized to observe any cell morphological changes caused by the compound. Localization of lupinifolin in S. mutans was detected using the thin layer chromatography technique. RESULTS The MIC range of lupinifolin against S. mutans (n=6) was 2-4 μg/ml. This compound displayed bactericidal effects on S. mutans ATCC 25175 by 90-99.9% killing at 4MIC-16MIC after 8-24 hours. Lupinifolin-treated cells demonstrated no lysis. However, significant cytoplasmic leakage through the bacterial membrane was observed after treatment with lupinifolin at 4MIC-16MIC. As revealed by ultrastructural analysis, lupinifolin produced some changes in bacterial cell walls and membranes. Moreover, the compound was observed in the cytoplasmic fraction of the lupinifolin-treated cells. These results suggest that lupinifolin can enter the cell of bacteria but does not accumulate in the cell envelope and subsequently disrupts the integrity of the cytoplasmic membrane, leading to cell death. CONCLUSION The scientific evidence from this study offers valuable insights into the potential role of lupinifolin in pharmaceutical and antibiotic applications and supports the therapeutic effects of A. myriophylla, which has traditionally been used as an alternative treatment for dental caries.
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Affiliation(s)
- Surasak Limsuwan
- Faculty of Traditional Thai Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Excellence Research Laboratory on Natural Products, Faculty of Science and Natural Product Research Center of Excellence, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand.
| | - Kotchakorn Moosigapong
- Faculty of Traditional Thai Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Excellence Research Laboratory on Natural Products, Faculty of Science and Natural Product Research Center of Excellence, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
| | - Siriporn Jarukitsakul
- Faculty of Traditional Thai Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Excellence Research Laboratory on Natural Products, Faculty of Science and Natural Product Research Center of Excellence, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
| | - Nantiya Joycharat
- Faculty of Traditional Thai Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Excellence Research Laboratory on Natural Products, Faculty of Science and Natural Product Research Center of Excellence, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
| | - Sasitorn Chusri
- Faculty of Traditional Thai Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Excellence Research Laboratory on Natural Products, Faculty of Science and Natural Product Research Center of Excellence, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
| | - Patcharawalai Jaisamut
- Faculty of Traditional Thai Medicine, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
| | - Supayang Piyawan Voravuthikunchai
- Excellence Research Laboratory on Natural Products, Faculty of Science and Natural Product Research Center of Excellence, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Department of Microbiology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
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Dholvitayakhun A, Trachoo N, Narkkong NA, Cushnie TT. Using scanning and transmission electron microscopy to investigate the antibacterial mechanism of action of the medicinal plant Annona squamosa Linn. J Herb Med 2017. [DOI: 10.1016/j.hermed.2016.10.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Baskaran SA, Kollanoor-Johny A, Nair MS, Venkitanarayanan K. Efficacy of Plant-Derived Antimicrobials in Controlling Enterohemorrhagic Escherichia coli Virulence In Vitro. J Food Prot 2016; 79:1965-1970. [PMID: 28221905 DOI: 10.4315/0362-028x.jfp-16-104] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Escherichia coli O157:H7 is a major foodborne pathogen that can cause serious human illness characterized by hemorrhagic diarrhea and kidney failure. The pathology of enterohemorrhagic E. coli O157:H7 (EHEC) infection is primarily mediated by verotoxins, which bind to the globotriaosylceramide receptor on host cells. Antibiotics are contraindicated for treating EHEC infection because they lead to increased verotoxin release, thereby increasing the risk of renal failure and death in patients. Thus, alternative strategies are needed for controlling EHEC infections in humans. This study investigated the effect of subinhibitory concentrations of five plant-derived antimicrobial agents (PDAs) that are generally considered as safe, i.e., trans-cinnamaldehyde, eugenol, carvacrol, thymol, and β-resorcylic acid, on EHEC motility, adhesion to human intestinal epithelial cells, verotoxin production, and virulence gene expression. All tested PDAs reduced EHEC motility and attachment to human intestinal epithelial cells (P < 0.05) and decreased verotoxin synthesis by EHEC. The reverse transcription real-time PCR data revealed that PDAs decreased the expression of critical virulence genes in EHEC (P < 0.05). The results collectively suggest that these PDAs could be used to reduce EHEC virulence, but follow-up studies in animal models are necessary to validate these findings.
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Affiliation(s)
- Sangeetha Ananda Baskaran
- Department of Veterinary Public Health & Epidemiology, Veterinary College & Research Institute, Orathanadu, Tamil Nadu, India 614 625
| | - Anup Kollanoor-Johny
- Department of Animal Science, University of Minnesota, St. Paul, Minnesota 55108, USA
| | - Meera Surendran Nair
- Department of Animal Science, University of Connecticut, Storrs, Connecticut 06269, USA
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Shi C, Zhao X, Liu Z, Meng R, Chen X, Guo N. Antimicrobial, antioxidant, and antitumor activity of epsilon-poly-L-lysine and citral, alone or in combination. Food Nutr Res 2016; 60:31891. [PMID: 27312785 PMCID: PMC4911418 DOI: 10.3402/fnr.v60.31891] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Revised: 05/22/2016] [Accepted: 05/23/2016] [Indexed: 12/24/2022] Open
Abstract
Background Food safety is an important worldwide public health concern, and microbial contamination in foods not only leads to food deterioration and shelf life reduction but also results in economic losses and disease. Objective The main aim of the present study was to evaluate the effect of epsilon-poly-L-lysine (ε-PL) and citral combination against Escherichia coli O157:H7 (E. coli O157:H7) strains. The preliminary antioxidant and antitumor activities were also studied. Design Synergism is a positive interaction created when two compounds combine and exert an inhibitory effect that is greater than the sum of their individual effects. The synergistic antimicrobial effect of ε-PL and citral was studied using the checkerboard method against E. coli O157:H7. The minimal inhibitory concentration, time-kill, and scanning electron microscope assays were used to determine the antimicrobial activity of ε-PL and citral alone or in combination; 2,2-diphenyl-1-picrylhydrazyl-scavenging assay and western blotting were used in antioxidant activity assays; cell viability assay was carried out to finish preliminary antitumor test. Results Minimal inhibitory concentrations of ε-PL and citral resisted to the five E. coli O157:H7 strains were 2–4 µg/mL and 0.5–1 µg/mL, and the fractional inhibitory concentration indices were 0.25–0.375. The results of time-kill assay revealed that a stronger bactericidal effect in a laboratory medium might be exerted in the combination against E. coli O157:H7 than that in a food model. The compounds alone or in combination exhibited a potential 2,2-diphenyl-1-picrylhydrazyl radical–scavenging activity, and the expression of superoxide dismutase 1 and glutathione peroxidase 1 protein increased. The preliminary antitumor activity effect of the combination was better than ε-PL or citral alone. Conclusions These findings indicated that the combination of ε-PL and citral could not only be used as a promising naturally sourced food preservative but also be used in the pharmaceutical industry.
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Affiliation(s)
- Ce Shi
- Department of Food Quality and Safety, Jilin University, Changchun, P. R. China
| | - Xingchen Zhao
- Department of Food Quality and Safety, Jilin University, Changchun, P. R. China
| | - Zonghui Liu
- Department of Food Quality and Safety, Jilin University, Changchun, P. R. China
| | - Rizeng Meng
- Jilin Entry-Exit Inspection And Quarantine Bureau, Changchun, P. R. China
| | - Xiangrong Chen
- Department of Food Quality and Safety, Jilin University, Changchun, P. R. China
| | - Na Guo
- Department of Food Quality and Safety, Jilin University, Changchun, P. R. China;
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Murbach Teles Andrade BF, Nunes Barbosa L, Bérgamo Alves FC, Albano M, Mores Rall VL, Sforcin JM, Fernandes AAH, Fernandes Júnior A. The antibacterial effects ofMelaleuca alternifolia,Pelargonium graveolensandCymbopogon martiniiessential oils and major compounds on liquid and vapor phase. JOURNAL OF ESSENTIAL OIL RESEARCH 2015. [DOI: 10.1080/10412905.2015.1099571] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Khanavi M, Sabbagh-Bani-Azad M, Abdolghaffari AH, Vazirian M, Isazadeh I, Rezvanfar MA, Baeeri M, Mohammadirad A, Rahimi R, Shams-Ardekani MR, Abdollahi M. On the benefit of galls of Quercus brantii Lindl. in murine colitis: the role of free gallic acid. Arch Med Sci 2014; 10:1225-34. [PMID: 25624862 PMCID: PMC4296077 DOI: 10.5114/aoms.2014.47831] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 10/28/2012] [Accepted: 11/26/2012] [Indexed: 01/02/2023] Open
Abstract
INTRODUCTION In this study we investigated the effect of gall of Quercus brantii Lindl., a traditional Iranian medicine, in a murine model of experimental colitis induced in male rats by rectal administration of 2,4,6-trinitrobenzene sulfonic acid (TNBS). MATERIAL AND METHODS Quantification of the main active components was done for estimation of total phenolic content and free gallic acid. Gall of Quercus brantii Lindl. in two forms (gall powder and gall hydro alcoholic extract) was gavaged for 10 days (500 mg/kg). Ten days after induction of colitis, colonic status was examined by macroscopic, microscopic and biochemical analyses. Colonic tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) were analyzed as biomarkers of inflammatory condition. To determine the role of oxidative stress (OS) in colitis, the levels of cellular lipid peroxidation (LPO), total antioxidant power (TAP) and myeloperoxidase (MPO) were measured in colon tissues. RESULTS TNBS-induced colitis exhibited a significant increase in colon MPO activity and concentrations of cellular LPO, TNF-α and IL-1β, while TAP was significantly reduced. Microscopic evaluations of the colonic damage in the colitis group revealed multifocal degenerative changes in the epithelial lining and areas of necrosis, extensive mucosal and sub-mucosal damage with congested blood vessels, edema and hemorrhages along with extensive infiltration of inflammatory cells. Parameters including macroscopic and microscopic scores, TNF-α, IL-1β, LPO, TAP and MPO improved by both gall extract and gall powder of Quercus brantii Lindl. and reached close to normal levels. The level of total phenols (GAE/100 g of sample) and free gallic acid were estimated to be 88.43 ±7.23 (mean ± SD) and 3.74% of dry weight, respectively. CONCLUSIONS The present study indicates that the gall of Quercus brantii Lindl. is able to exert antioxidative and anti-inflammatory effects on the biochemical and pathological parameters of colitis.
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Affiliation(s)
- Mahnaz Khanavi
- Department of Pharmacognosy, Faculty of Pharmacy, and Medicinal Plants Research Center, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Mansoureh Sabbagh-Bani-Azad
- Department of Pharmacognosy, Faculty of Pharmacy, and Medicinal Plants Research Center, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Amir Hossein Abdolghaffari
- Pharmacology and Applied Medicine, Department of Medicinal Plants Research Center, Institute of Medicinal Plants, ACECR, Karaj, Iran
- International Campus, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahdi Vazirian
- Department of Pharmacognosy, Faculty of Pharmacy, and Medicinal Plants Research Center, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Isa Isazadeh
- Department of Pharmacognosy, Faculty of Pharmacy, and Medicinal Plants Research Center, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Mohammad Amin Rezvanfar
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Baeeri
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Azadeh Mohammadirad
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Roja Rahimi
- Department of Pharmacognosy, Faculty of Pharmacy, and Medicinal Plants Research Center, Tehran University of Medical Sciences (TUMS), Tehran, Iran
- Faculty of Traditional Iranian Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Shams-Ardekani
- Department of Pharmacognosy, Faculty of Pharmacy, and Medicinal Plants Research Center, Tehran University of Medical Sciences (TUMS), Tehran, Iran
- Faculty of Traditional Iranian Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Abdollahi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
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Judaki A, Panahi J, Havasian MR, Tajbakhsh P, Roozegar MA. Study of the inhibitory effect of Quercus Coccifera's aqueous extract on Staphylococcus aureus and Pseudomonas aeruginosa In vitro. Bioinformation 2014; 10:689-92. [PMID: 25512685 PMCID: PMC4261113 DOI: 10.6026/97320630010689] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Accepted: 11/18/2014] [Indexed: 12/16/2022] Open
Abstract
The use of therapeutic herbs has become of great importance these days due to the increase in drug resistance. From a long time ago the Venus' navel plant has been used to treat infections. In this study the antibacterial effect of the aqueous extract from the Quercus coccifera (jaft) herb, under laboratory conditions. This study was carried out experimentally. After collecting the Venus navel herb, it was dried in a warm dry environment away from direct sunlight in the shade. The alcoholic extract was prepared using a standard method. Clinical samples of staphylococcus aureus and pseudomonas aeruginosa were acquired from Ilam's health care institutes. The inhibitory effect of the extracts was analysed in the Mueller Hinton using the disk diffusion method for both bacteria. Then MIC and MBC of the extracts was determined using the Macro broth dilution method. At its highest concentration the aqueous extract had an inhibition zone of 27.2 and 23.7 mm on staphylococcus aureus and pseudomonas aeruginosa consecutively. The MIC and MBC for staphylococcus aureus were 10 and 12.5 µg/ml and for pseudomonas aeruginosa they were 10 and 17.5 µg/m consecutively. The results of this study show the strong antimicrobial effect of jaft's aqueous extract on staphylococcus aureus and pseudomonas aeruginosa and if more studies are based on this topic it could be a substitute for common antibiotics.
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Affiliation(s)
- Arezo Judaki
- Department of Gastroenterology, Ilam University of Medical Sciences, Ilam/ Iran
| | - Jafar Panahi
- Student research of committee, Ilam University of Medical Sciences, Ilam/Iran
| | | | - Parnian Tajbakhsh
- Student research of committee, Ilam University of Medical Sciences, Ilam/Iran
| | - Mohamad Ali Roozegar
- Department of Periodontics, Faculty of Dentistry, Ilam University of Medical Sciences, Ilam, Iran
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Pellarín MG, Albrecht C, Rojas MJ, Aguilar JJ, Konigheim BS, Paraje MG, Albesa I, Eraso AJ. Inhibition of cytotoxicity of Shiga toxin of Escherichia coli O157:H7 on vero cells by Prosopis alba Griseb (Fabaceae) and Ziziphus mistol Griseb (Rhamnaceae) extracts. J Food Prot 2013; 76:1733-9. [PMID: 24112573 DOI: 10.4315/0362-028x.jfp-13-087] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The capacity of Prosopis alba Griseb. and Ziziphus mistol Griseb. fruit extracts to inhibit the toxic action of Shiga toxin (Stx) was investigated. Purification of Stx from Escherichia coli O157:H7 was performed by saline precipitation and affinity chromatography using a column with globotriaosylceramide, while the fruits were subjected to ethanolic or aqueous extractions. The protective action of both fruits was determined by pre-, co-, and postincubation of one 50% cytotoxic dose per ml of Stx with different concentrations of ethanolic and aqueous extracts in confluent monolayers of Vero cells for 72 h at 37°C (5% CO2). The inhibition of the cytotoxic effect of Stx by fruit extracts was determined by the neutral red vital staining technique. The extraction of the polyphenols and flavonoids was effective, and more polyphenols per milligram of dissolved solids were obtained from P. alba than from Z. mistol. However, there were more flavonoids in Z. mistol than in P. alba. Components of both fruits increased the viability of cells treated with Stx when the extracts were preincubated with Stx for 1 h before being applied to the cell cultures, with the ethanolic extract of P. alba showing 95% cell viability at a concentration of 2.45 mg/ml. The extracts were less effective in protecting cells when Stx, extracts, and cells were coincubated together without a previous incubation of Stx; only the concentrations of 19.46 mg/ml for the P. alba aqueous extract and 3.75 mg/ml for the Z. mistol ethanolic extract resulted in the inhibition of cytotoxicity, with 52 and 56% cell viability occurring, respectively. Investigation into this difference in the protection of cells indicated that the protein molecule of Stx suffered degradation to advanced oxidative protein products during preincubation with extracts, principally with P. alba, which exhibited a greater amount of nonflavonoid polyphenols than Z. mistol. The prooxidant action on Stx favored the cells and enhanced the protective action of both fruits.
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Affiliation(s)
- M G Pellarín
- Escuela de Nutrición, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Enrique Barros s/n, Ciudad Universitaria, Córdoba, Argentina;,
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Ellagitannin from Quercus infectoria eradicates intestinal colonization and prevents renal injuries in mice infected with Escherichia coli O157 : H7. J Med Microbiol 2012; 61:1366-1372. [DOI: 10.1099/jmm.0.044495-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Antibacterial Activity of Rhodomyrtus tomentosa (Aiton) Hassk. Leaf Extract against Clinical Isolates of Streptococcus pyogenes. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 2012:697183. [PMID: 22973404 PMCID: PMC3438885 DOI: 10.1155/2012/697183] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 07/26/2012] [Accepted: 07/31/2012] [Indexed: 11/18/2022]
Abstract
Ethanol extract of Rhodomyrtus tomentosa (Aiton) Hassk. leaf was evaluated for antibacterial activity against 47 clinical isolates of Streptococcus pyogenes. The extract exhibited good anti-S. pyogenes activity against all the tested isolates with similar minimum inhibitory concentration (MIC, 3.91-62.5 μg mL(-1)) and minimum bactericidal concentration (MBC, 3.91-62.5 μg mL(-1)) ranges. No surviving cells were detected at 16 h after treatment with 8 × MIC of the extract. The extract-treated cells demonstrated no lysis and cytoplasmic leakage through the bacterial membrane. Electron micrographs further revealed that the extract did not cause any dramatic changes on the treated cells. Rhodomyrtone, an isolated compound, exhibited good anti-S. pyogenes activity (14 isolates), expressed very low MIC (0.39-1.56 μg mL(-1)) and MBC (0.39-1.56 μg mL(-1)) values. Rhodomyrtus tomentosa leaf extract and rhodomyrtone displayed promising antibacterial activity against clinical isolates of S. pyogenes.
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Expression of OXA-type and SFO-1 β-lactamases induces changes in peptidoglycan composition and affects bacterial fitness. Antimicrob Agents Chemother 2012; 56:1877-84. [PMID: 22290977 DOI: 10.1128/aac.05402-11] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
β-Lactamases and penicillin-binding proteins (PBPs) have evolved from a common ancestor. β-Lactamases are enzymes that degrade β-lactam antibiotics, whereas PBPs are involved in the synthesis and processing of peptidoglycan, which forms an elastic network in the bacterial cell wall. This study analyzed the interaction between β-lactamases and peptidoglycan and the impact on fitness and biofilm production. A representative set of all classes of β-lactamases was cloned in the expression vector pBGS18 under the control of the CTX-M promoter and expressed in Escherichia coli MG1655. The peptidoglycan composition of all clones was evaluated, and quantitative changes were found in E. coli strains expressing OXA-24, OXA-10-like, and SFO-1 (with its upstream regulator AmpR) β-lactamases; the level of cross-linked muropeptides decreased, and their average length increased. These changes were associated with a statistically significant fitness cost, which was demonstrated in both in vitro and in vivo experiments. The observed changes in peptidoglycan may be explained by the presence of residual DD-endopeptidase activity in these β-lactamases, which may result in hydrolysis of the peptide cross bridge. The biological cost associated with these changes provides important data regarding the interaction between β-lactamases and the metabolism of peptidoglycan and may provide an explanation for the epidemiology of these β-lactamases in Enterobacteriaceae.
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