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Shi L, Lin W, Cai Y, Chen F, Zhang Q, Liang D, Xiu Y, Lin S, He B. Oxidative Stress-Mediated Repression of Virulence Gene Transcription and Biofilm Formation as Antibacterial Action of Cinnamomum burmannii Essential Oil on Staphylococcus aureus. Int J Mol Sci 2024; 25:3078. [PMID: 38474323 DOI: 10.3390/ijms25053078] [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: 01/17/2024] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/14/2024] Open
Abstract
This work aimed to identify the chemical compounds of Cinnamomum burmannii leaf essential oil (CBLEO) and to unravel the antibacterial mechanism of CBLEO at the molecular level for developing antimicrobials. CBLEO had 37 volatile compounds with abundant borneol (28.40%) and showed good potential to control foodborne pathogens, of which Staphylococcus aureus had the greatest inhibition zone diameter (28.72 mm) with the lowest values of minimum inhibitory concentration (1.0 μg/mL) and bactericidal concentration (2.0 μg/mL). To unravel the antibacterial action of CBLEO on S. aureus, a dynamic exploration of antibacterial growth, material leakage, ROS formation, protein oxidation, cell morphology, and interaction with genome DNA was conducted on S. aureus exposed to CBLEO at different doses (1/2-2×MIC) and times (0-24 h), indicating that CBLEO acts as an inducer for ROS production and the oxidative stress of S. aureus. To highlight the antibacterial action of CBLEO on S. aureus at the molecular level, we performed a comparative association of ROS accumulation with some key virulence-related gene (sigB/agrA/sarA/icaA/cidA/rsbU) transcription, protease production, and biofilm formation in S. aureus subjected to CBLEO at different levels and times, revealing that CBLEO-induced oxidative stress caused transcript suppression of virulence regulators (RsbU and SigB) and its targeted genes, causing a protease level increase destined for the biofilm formation and growth inhibition of S. aureus, which may be a key bactericidal action. Our findings provide valuable information for studying the antibacterial mechanism of essential oil against pathogens.
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Affiliation(s)
- Lingling Shi
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China
| | - Wei Lin
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China
| | - Yanling Cai
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou 510520, China
| | - Feng Chen
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China
| | - Qian Zhang
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou 510520, China
| | - Dongcheng Liang
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou 510520, China
| | - Yu Xiu
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China
| | - Shanzhi Lin
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Tree and Ornamental Plant Breeding and Biotechnology Laboratory of National Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China
| | - Boxiang He
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou 510520, China
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Lu L, Wang J, Wang C, Zhu J, Wang H, Liao L, Zhao Y, Wang X, Yang C, He Z, Li M. Plant-derived virulence arresting drugs as novel antimicrobial agents: Discovery, perspective, and challenges in clinical use. Phytother Res 2024; 38:727-754. [PMID: 38014754 DOI: 10.1002/ptr.8072] [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: 06/21/2023] [Revised: 09/23/2023] [Accepted: 11/05/2023] [Indexed: 11/29/2023]
Abstract
Antimicrobial resistance (AMR) emerges as a severe crisis to public health and requires global action. The occurrence of bacterial pathogens with multi-drug resistance appeals to exploring alternative therapeutic strategies. Antivirulence treatment has been a positive substitute in seeking to circumvent AMR, which aims to target virulence factors directly to combat bacterial infections. Accumulated evidence suggests that plant-derived natural products, which have been utilized to treat infectious diseases for centuries, can be abundant sources for screening potential virulence-arresting drugs (VADs) to develop advanced therapeutics for infectious diseases. This review sums up some virulence factors and their actions in various species of bacteria, as well as recent advances pertaining to plant-derived natural products as VAD candidates. Furthermore, we also discuss natural VAD-related clinical trials and patents, the perspective of VAD-based advanced therapeutics for infectious diseases and critical challenges hampering clinical use of VADs, and genomics-guided identification for VAD therapeutic. These newly discovered natural VADs will be encouraging and optimistic candidates that may sustainably combat AMR.
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Affiliation(s)
- Lan Lu
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, Sichuan, P.R. China
| | - Jingya Wang
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, Sichuan, P.R. China
| | - Chongrui Wang
- Faculty of Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, Shandong, P.R. China
| | - Jie Zhu
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, Sichuan, P.R. China
| | - Hongping Wang
- Safety Evaluation Center, Sichuan Institute for Drug Control (Sichuan Testing Center of Medical Devices), Chengdu, Sichuan, P.R. China
| | - Li Liao
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, Sichuan, P.R. China
| | - Yuting Zhao
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, Sichuan, P.R. China
| | - Xiaobo Wang
- Department of Hepatobiliary Surgery, Langzhong People's Hospital, Langzhong, Sichuan, P.R. China
| | - Chen Yang
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, Sichuan, P.R. China
| | - Zhengyou He
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, Sichuan, P.R. China
| | - Mingxing Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
- Cell Therapy & Cell Drugs of Luzhou Key Laboratory, Luzhou, Sichuan, China
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Ghavam M, Markabi FS. Evaluation of Yield, Chemical Profile, and Antimicrobial Activity of Teucrium polium L. Essential Oil Used in Iranian Folk Medicine. Appl Biochem Biotechnol 2024:10.1007/s12010-023-04847-6. [PMID: 38194183 DOI: 10.1007/s12010-023-04847-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2023] [Indexed: 01/10/2024]
Abstract
Teucrium polium L. is used to treat many diseases like abdominal pains, indigestion, colds, and reproductive system diseases in Iranian folk medicine. This study was designed to investigate the yield, chemical profile of essential oil, and antibacterial and antifungal activity of this species. The flowering aerial parts of T. polium were collected from the Margh region of Kashan, Iran. The essential oil of the plant was extracted and separated using the Clevenger apparatus and analyzed using gas chromatography-mass spectrometry (GC-MS). The antimicrobial activity of the essential oil against a variety of standard microbial strains was investigated with the Agar well-diffusion method and determination of the lowest growth inhibitory and lethal concentration (MIC and MBC). The results showed that the yield of T. polium essential oil (TPEO) was 0.5778%. Based on the results of GC-MS, 76 compounds (99.3%) were identified in the TPEO, of which α-pinene (9.67%), β-caryophyllene (8.07%), β-pinene (5.04%), nerolidol (4.94%), and oleic acid (4.57%) were the dominant components. The results of antimicrobial tests showed that the TPEO on Staphylococcus aureus created the largest zone of inhibition (~ 14.29 mm). The dominant inhibitory activity of this essential oil was against Gram-negative bacteria Escherichia coli (~ 9.00 mm), which was almost similar to rifampin (~ 11 mm). It seems that the predominance of terpenoid and acidic compounds of the essential oil is one of the possible factors of the anti-bacterial activity of this essential oil. Therefore, the TPEO may be a promising and potential strategy to inhibit some bacterial strains.
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Affiliation(s)
- Mansureh Ghavam
- Department of Nature Engineering, Faculty of Natural Resources and Earth Sciences, University of Kashan, Kashan, Iran.
| | - Fateme Sadat Markabi
- Department of Nature Engineering, Faculty of Natural Resources and Earth Sciences, University of Kashan, Kashan, Iran
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Tapia-Rodriguez MR, Cantu-Soto EU, Vazquez-Armenta FJ, Bernal-Mercado AT, Ayala-Zavala JF. Inhibition of Acinetobacter baumannii Biofilm Formation by Terpenes from Oregano ( Lippia graveolens) Essential Oil. Antibiotics (Basel) 2023; 12:1539. [PMID: 37887240 PMCID: PMC10604308 DOI: 10.3390/antibiotics12101539] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/11/2023] [Accepted: 10/12/2023] [Indexed: 10/28/2023] Open
Abstract
Acinetobacter baumannii is a nosocomial pathogen known for its ability to form biofilms, leading to persistent infections and antibiotic resistance. The limited effective antibiotics have encouraged the development of innovative strategies such as using essential oils and their constituents. This study evaluated the efficacy of oregano (Lippia graveolens) essential oil (OEO) and its terpene compounds, carvacrol and thymol, in inhibiting A. baumannii biofilms. These treatments showed a minimum inhibitory concentration of 0.6, 0.3, and 2.5 mg/mL and a minimum bactericidal concentration of 1.2, 0.6, and 5 mg/mL, respectively. Sub-inhibitory doses of each treatment and the OEO significantly reduced biofilm biomass and the covered area of A. baumannii biofilms as measured by fluorescence microscopy. Carvacrol at 0.15 mg/mL exhibited the most potent efficacy, achieving a remarkable 95% reduction. Sub-inhibitory concentrations of carvacrol significantly reduced the biofilm formation of A. baumannii in stainless steel surfaces by up to 1.15 log CFU/cm2 compared to untreated bacteria. The OEO and thymol exhibited reductions of 0.6 log CFU/cm2 and 0.4 log CFU/cm2, respectively, without affecting cell viability. Moreover, the terpenes inhibited twitching motility, a crucial step in biofilm establishment, with carvacrol exhibiting the highest inhibition, followed by OEO and thymol. The study provides valuable insights into the potential of terpenes as effective agents against A. baumannii biofilms, offering promising avenues for developing novel strategies to prevent persistent infections and overcome antibiotic resistance.
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Affiliation(s)
- Melvin Roberto Tapia-Rodriguez
- Departamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora, 5 de Febrero 818 Sur, Col. Centro, Ciudad Obregón 85000, Mexico;
| | - Ernesto Uriel Cantu-Soto
- Departamento de Biotecnología y Ciencias Alimentarias, Instituto Tecnológico de Sonora, 5 de Febrero 818 Sur, Col. Centro, Ciudad Obregón 85000, Mexico;
| | - Francisco Javier Vazquez-Armenta
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, México Blvd. Luis Encinas y Rosales S/N, Col. Centro, Hermosillo 83000, Mexico;
| | - Ariadna Thalia Bernal-Mercado
- Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, México Blvd. Luis Encinas y Rosales S/N, Col. Centro, Hermosillo 83000, Mexico;
| | - Jesus Fernando Ayala-Zavala
- Centro de Investigación en Alimentación y Desarrollo, A.C. Carretera Gustavo Enrique Astiazarán Rosas 46, Hermosillo 83304, Mexico;
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Zhang H, Zhang Z, Li J, Qin G. New Strategies for Biocontrol of Bacterial Toxins and Virulence: Focusing on Quorum-Sensing Interference and Biofilm Inhibition. Toxins (Basel) 2023; 15:570. [PMID: 37755996 PMCID: PMC10536320 DOI: 10.3390/toxins15090570] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 09/05/2023] [Accepted: 09/09/2023] [Indexed: 09/28/2023] Open
Abstract
The overuse of antibiotics and the emergence of multiple-antibiotic-resistant pathogens are becoming a serious threat to health security and the economy. Reducing antimicrobial resistance requires replacing antibiotic consumption with more biocontrol strategies to improve the immunity of animals and humans. Probiotics and medicinal plants have been used as alternative treatments or preventative therapies for a variety of diseases caused by bacterial infections. Therefore, we reviewed some of the anti-virulence and bacterial toxin-inhibiting strategies that are currently being developed; this review covers strategies focused on quenching pathogen quorum sensing (QS) systems, the disruption of biofilm formation and bacterial toxin neutralization. It highlights the probable mechanism of action for probiotics and medicinal plants. Although further research is needed before a definitive statement can be made on the efficacy of any of these interventions, the current literature offers new hope and a new tool in the arsenal in the fight against bacterial virulence factors and bacterial toxins.
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Affiliation(s)
- Hua Zhang
- Henan Key Laboratory of Ion Beam Bio-Engineering, College of Physics, Zhengzhou University, Zhengzhou 450000, China;
- School of Food and Biological Engineering, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China;
| | - Zhen Zhang
- School of Food and Biological Engineering, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China;
| | - Jing Li
- School of Food and Biological Engineering, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China;
| | - Guangyong Qin
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450000, China;
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Mumtaz L, Farid A, Yousef Alomar S, Ahmad N, Nawaz A, Andleeb S, Amin A. Assesment of polyphenolic compounds against biofilms produced by clinical Acinetobacter baumannii strains using in silico and in vitro models. Saudi J Biol Sci 2023; 30:103743. [PMID: 37564783 PMCID: PMC10410175 DOI: 10.1016/j.sjbs.2023.103743] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 07/05/2023] [Accepted: 07/14/2023] [Indexed: 08/12/2023] Open
Abstract
Several types of microbial infections are caused by Acinetobacter baumanii that has developed resistance to antimicrobial agents. We therefore investigated the role of plant polyphenols against A. baumannii using in silico and in vitro models. The clinical strains of A. baumannii were investigated for determination of resistance pattern and resistance mechanisms including efflux pump, extended spectrum beta lactamase, phenotype detection of AmpC production, and Metallo-β-lactamase. The polyphenolic compounds were docked against transcription regulator BfmR (PDB ID 6BR7) and antimicrobial, antibiofilm, and anti-quorum sensing activities were performed. The antibiogram studies showed that all isolated strains were resistant. Strain A77 was positive in Metallo-β-lactamase production. Similarly, none of strains were producers of AmpC, however, A77, A76, A75 had active efflux pumps. Molecular docking studies confirmed a strong binding affinity of Rutin and Catechin towards transcription regulator 6BR7. A significant antimicrobial activity was recorded in case of quercetin and syringic acid (MIC 3.1 µg/mL) followed by vanillic acid and caffeic acid (MIC 12.5 µg/mL). All tested compounds presented a strong antibiofilm activity against A. baumanii strain A77 (65 to 90%). It was concluded that all tested polyphenols samples posess antimicrobial and antibiofilm activities, and hence they may be utilized to treat multidrug resistance A. baumannii infections.
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Affiliation(s)
- Laraib Mumtaz
- Gomal Centre of Biochemistry and Biotechnology(GCBB), Gomal University, KPK, 29050 D.I.Khan, Pakistan
- Gomal Centre of Pharmaceutical Sciences, Faculty of Pharmacy, Gomal University, D.I.Khan 29050, Pakistan
| | - Arshad Farid
- Gomal Centre of Biochemistry and Biotechnology(GCBB), Gomal University, KPK, 29050 D.I.Khan, Pakistan
| | - Suliman Yousef Alomar
- Doping Research Chair, Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Naushad Ahmad
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Asif Nawaz
- Gomal Centre of Pharmaceutical Sciences, Faculty of Pharmacy, Gomal University, D.I.Khan 29050, Pakistan
| | - Saadia Andleeb
- Atta Ur Rehman School of Biological Sciences, National University of Science and Technology, Islamabad Pakistan
| | - Adnan Amin
- Gomal Centre of Pharmaceutical Sciences, Faculty of Pharmacy, Gomal University, D.I.Khan 29050, Pakistan
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Wang Q, Wang X, Huang L, Cheng Y, Ren L, Yang H, Zhou C, Wang X, He J. Promoter characterization of a citrus linalool synthase gene mediating interspecific variation in resistance to a bacterial pathogen. BMC PLANT BIOLOGY 2023; 23:405. [PMID: 37620808 PMCID: PMC10463377 DOI: 10.1186/s12870-023-04413-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 08/14/2023] [Indexed: 08/26/2023]
Abstract
BACKGROUND Terpenoids play essential roles in plant defense against biotic stresses. In Citrus species, the monoterpene linalool mediates resistance against citrus canker disease caused by the gram-negative bacteria Xanthomonas citri subsp. citri (Xcc). Previous work had associated linalool contents with resistance; here we characterize transcriptional responses of linalool synthase genes. RESULTS Leaf linalool contents are highly variable among different Citrus species. "Dongfang" tangerine (Citrus reticulata), a species with high linalool levels was more resistant to Xcc than "Shatian" pummelo (C. grandis) which accumulates only small amounts of linalool. The coding sequences of the major leaf-expressed linalool synthase gene (STS4) are highly conserved, while transcript levels differ between the two Citrus species. To understand this apparent differential transcription, we isolated the promoters of STS4 from the two species, fused them to a GUS reporter and expressed them in Arabidopsis. This reporter system revealed that the two promoters have different constitutive activities, mainly in trichomes. Interestingly, both linalool contents and STS4 transcript levels are insensitive to Xcc infestation in citrus plants, but in these transgenic Arabidopsis plants, the promoters are activated by challenge of a bacterial pathogen Pseudomonas syringae, as well as wounding and external jasmonic acid treatment. CONCLUSIONS Our study reveals variation in linalool and resistance to Xcc in citrus plants, which may be mediated by different promoter activities of a terpene synthase gene in different Citrus species.
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Affiliation(s)
- Qiying Wang
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Xiaochun Wang
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Linhua Huang
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Yujiao Cheng
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Li Ren
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Huayu Yang
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Changyong Zhou
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Xuefeng Wang
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China.
| | - Jun He
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China.
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Machado AM, Lopes V, Barata AM, Póvoa O, Farinha N, Figueiredo AC. Chemical Variability of the Essential Oils from Two Portuguese Apiaceae: Coriandrum sativum L. and Foeniculum vulgare Mill. PLANTS (BASEL, SWITZERLAND) 2023; 12:2749. [PMID: 37514362 PMCID: PMC10384636 DOI: 10.3390/plants12142749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 07/17/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
Coriandrum sativum L. and Foeniculum vulgare Mill. are two aromatic and medicinal Apiaceae species commonly grown in Portugal, whose essential oils (EOs) are used in the food, pharmaceutical, and cosmetics industries. The present study evaluated EOs isolated from the fruits and vegetative aerial parts (VAPs) of 11 samples of Coriandrum sativum L. and from the fruits of 19 samples of Foeniculum vulgare Mill. The plant material was grown in experimental fields, after collection from several regions of mainland Portugal. The EOs were isolated by hydrodistillation and analyzed by gas chromatography and gas chromatography-mass spectrometry. The coriander EOs analysis evidenced two main clusters, with the first containing the fruits' EOs dominated by linalool (60-73%), γ-terpinene, and α-pinene and the second with the VAPs' EOs, which showed 2-trans-decenal (37-63%) and n-decanal (13-30%) as the main compounds. The fennel EOs analysis revealed two well correlated clusters, the first dominated by estragole (34-76%) and fenchone (16-30%) and the other dominated by trans-anethole (37-56%) and fenchone (14-34%). The present data suggest coriander EOs' chemical descriptors as linalool for the fruits' EOs and 2-trans-decenal with n-decanal for the VAPs' EOs. For the fennel fruit EOs, the putative descriptors were trans-anethole and estragole, with variable fenchone content. The gathered data reinforce the relevance of clarifying variability of these species' EOs, particularly when considering aromatic and medicinal plants with such a wide range of applications.
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Affiliation(s)
- Alexandra M Machado
- Centro de Estudos do Ambiente e do Mar (CESAM Lisboa), Faculdade de Ciências da Universidade de Lisboa (FCUL), Biotecnologia Vegetal, DBV, C2, Campo Grande, 1749-016 Lisboa, Portugal
| | - Violeta Lopes
- Banco Português de Germoplasma Vegetal (BPGV), Instituto Nacional de Investigação Agrária e Veterinária, Quinta de S. José, S. Pedro de Merelim, 4700-859 Braga, Portugal
| | - Ana Maria Barata
- Banco Português de Germoplasma Vegetal (BPGV), Instituto Nacional de Investigação Agrária e Veterinária, Quinta de S. José, S. Pedro de Merelim, 4700-859 Braga, Portugal
| | - Orlanda Póvoa
- VALORIZA-Centro de Investigação para a Valorização de Recursos Endógenos, Instituto Politécnico de Portalegre, Praça do Município 11, 7300-110 Portalegre, Portugal
- Instituto Politécnico de Portalegre, Praça do Município 11, 7300-110 Portalegre, Portugal
| | - Noémia Farinha
- Instituto Politécnico de Portalegre, Praça do Município 11, 7300-110 Portalegre, Portugal
| | - Ana Cristina Figueiredo
- Centro de Estudos do Ambiente e do Mar (CESAM Lisboa), Faculdade de Ciências da Universidade de Lisboa (FCUL), Biotecnologia Vegetal, DBV, C2, Campo Grande, 1749-016 Lisboa, Portugal
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Shen G, Yang L, Lv X, Zhang Y, Hou X, Li M, Zhou M, Pan L, Chen A, Zhang Z. Antibiofilm Activity and Mechanism of Linalool against Food Spoilage Bacillus amyloliquefaciens. Int J Mol Sci 2023; 24:10980. [PMID: 37446158 DOI: 10.3390/ijms241310980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/20/2023] [Accepted: 06/29/2023] [Indexed: 07/15/2023] Open
Abstract
Pellicle biofilm-forming bacteria Bacillus amyloliquefaciens are the major spoilage microorganisms of soy products. Due to their inherent resistance to antibiotics and disinfectants, pellicle biofilms formed are difficult to eliminate and represent a threat to food safety. Here, we assessed linalool's ability to prevent the pellicle of two spoilage B. amyloliquefaciens strains. The minimum biofilm inhibitory concentration (MBIC) of linalool against B. amyloliquefaciens DY1a and DY1b was 4 μL/mL and 8 μL/mL, respectively. The MBIC of linalool had a considerable eradication rate of 77.15% and 83.21% on the biofilm of the two strains, respectively. Scanning electron microscopy observations revealed that less wrinkly and thinner pellicle biofilms formed on a medium supplemented with 1/2 MBIC and 1/4 MBIC linalool. Also, linalool inhibited cell motility and the production of extracellular polysaccharides and proteins of the biofilm matrix. Furthermore, linalool exposure reduced the cell surface hydrophobicity, zeta potential, and cell auto-aggregation of B. amyloliquefaciens. Molecular docking analysis demonstrated that linalool interacted strongly with quorum-sensing ComP receptor and biofilm matrix assembly TasA through intermolecular hydrogen bonds, hydrophobic contacts, and van der Waals forces interacting with site residues. Overall, our findings suggest that linalool may be employed as a potential antibiofilm agent to control food spoilage B. amyloliquefaciens.
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Affiliation(s)
- Guanghui Shen
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Lu Yang
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Xinyu Lv
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Yingfan Zhang
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Xiaoyan Hou
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Meiliang Li
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Man Zhou
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Le Pan
- Chemical Engineering College, Xinjiang Agricultural University, Urumqi 830052, China
| | - Anjun Chen
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Zhiqing Zhang
- College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
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Zeng L, Lin F, Ling B. Effect of traditional Chinese medicine monomers interfering with quorum-sensing on virulence factors of extensively drug-resistant Acinetobacter baumannii. Front Pharmacol 2023; 14:1135180. [PMID: 37063277 PMCID: PMC10097947 DOI: 10.3389/fphar.2023.1135180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 03/20/2023] [Indexed: 04/03/2023] Open
Abstract
The antimicrobial resistance of Acinetobacter baumannii (A. baumannii) clinical isolates has emerged as a great threat to public health. Quorum sensing (QS) is one of the resistance mechanisms for drug-resistant A. baumannii. Interfering with QS is a promising strategy to combat infections caused by drug-resistant bacteria. This study explored the QS inhibition ability of thirty-four traditional Chinese medicine monomers (TCMMs) and assessed the effect of QS inhibitors (QSIs) on the virulence factors of twelve extensively drug-resistant A. baumannii (XDRAB) strains. Nine traditional Chinese medicine monomers, such as caffeic acid, cinnamic acid, and myricetin, were found to be able to inhibit the bacterial QS. Then, at 1/8 of the minimal inhibitory concentration, we found that these QSIs inhibited extensively drug-resistant A. baumannii adhesion and biofilm formation and downregulated the expression levels of virulence-associated genes (abaI, abaR, csuE, pgaA, and bap). In conclusion, nine traditional Chinese medicine monomers have QS inhibitory activity and may downregulate QS genes to interfere with the QS system, which could inhibit the expression of extensively drug-resistant A. baumannii virulence factors. These results suggest that traditional Chinese medicine monomers could develop as novel anti-virulence compounds to control extensively drug-resistant A. baumannii infections.
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Affiliation(s)
- Li Zeng
- School of Pharmacy, Chengdu Medical College, Chengdu, China
- Department of Pharmacy, The Third People’s Hospital of Yibin, Yibin, China
| | - Fei Lin
- Department of Pharmacy, The First Affiliated Hospital of Chengdu Medical College, Chengdu Medical College, Chengdu, China
| | - Baodong Ling
- School of Pharmacy, Chengdu Medical College, Chengdu, China
- *Correspondence: Baodong Ling,
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11
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Citrus sinensis Essential Oils an Innovative Antioxidant and Antipathogenic Dual Strategy in Food Preservation against Spoliage Bacteria. Antioxidants (Basel) 2023; 12:antiox12020246. [PMID: 36829805 PMCID: PMC9952847 DOI: 10.3390/antiox12020246] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 01/16/2023] [Accepted: 01/18/2023] [Indexed: 01/27/2023] Open
Abstract
The present study evaluates the chemical compositions and antioxidant and antipathogenic properties of commercial orange (Citrus sinensis (L.) Osbeck) essential oils obtained using the cold-press method (EOP) and the cold-press method followed by steam distillation (EOPD). The chemical compositions of the volatilizable fractions, determined by gas chromatography-mass spectrometry, were similar in both samples. A relatively large amount of γ-terpinene was found in the EOPD (1.75%) as compared to the EOP (0.84%). Monoterpene hydrocarbons with limonene (90.4-89.8%) followed by myrcene (3.2-3.1%) as the main compounds comprised the principal phytochemical group. The non-volatile phenolics were eight times higher in the EOP than in the EOPD. Several assays with different specificity levels were used to study the antioxidant activity. Although both essential oils presented similar reducing capacities, the radical elimination ability was higher for the EOP. Regarding the antipathogenic properties, the EOs inhibited the biomass and cell viability of Staphylococcus aureus and Pseudomonas aeruginosa biofilms. Furthermore, both EOs similarly attenuated the production of elastase, pyocyanin, and quorum-sensing autoinducers as assessed using Gram-negative bacteria. The EOP and EOPD showed important antioxidant and antipathogenic properties, so they could represent natural alternatives to extend the shelf life of food products by preventing oxidation and contamination caused by microbial spoilage.
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12
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Panda SK, Buroni S, Swain SS, Bonacorsi A, da Fonseca Amorim EA, Kulshrestha M, da Silva LCN, Tiwari V. Recent advances to combat ESKAPE pathogens with special reference to essential oils. Front Microbiol 2022; 13:1029098. [PMID: 36560948 PMCID: PMC9763703 DOI: 10.3389/fmicb.2022.1029098] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 11/01/2022] [Indexed: 12/12/2022] Open
Abstract
Biofilm-associated bacteria, especially ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter spp.), are a serious challenge worldwide. Due to the lack of discovery of novel antibiotics, in the past two decades, it has become necessary to search for new antibiotics or to study synergy with the existing antibiotics so as to counter life-threatening infections. Nature-derived compounds/based products are more efficient than the chemically synthesized ones with less resistance and lower side effects. In this descriptive review, we discuss the most promising therapeutics for the treatment of ESKAPE-related biofilms. The first aspect includes different types of natural agents [botanical drugs, essential oils (EOs), antimicrobial peptides, bacteriophages, and endolysins] effective against ESKAPE pathogens. The second part of the review deals with special references to EOs/essential oil components (EOCs) (with some exclusive examples), mode of action (via interfering in the quorum-sensing pathways, disruption of biofilm and their inhibitory concentrations, expression of genes that are involved, other virulence factors), existing in literature so far. Moreover, different essential oils and their major constituents were critically discussed using in vivo models to target ESKAPE pathogens along with the studies involving existing antibiotics.
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Affiliation(s)
- Sujogya Kumar Panda
- Centre of Environment Studies, Climate Change and Public Health, RUSA 2.0, Utkal University, Vani Vihar, Bhubaneswar, Odisha, India
| | - Silvia Buroni
- Department of Biology and Biotechnology, University of Pavia, Pavia, Italy
| | - Shasank Sekhar Swain
- Division of Microbiology and Noncommunicable Diseases (NCDs), Indian Council of Medical Research (ICMR)–Regional Medical Research Centre, Bhubaneswar, Odisha, India
| | - Andrea Bonacorsi
- Department of Biology and Biotechnology, University of Pavia, Pavia, Italy
| | | | - Mukta Kulshrestha
- Department of Biochemistry, Central University of Rajasthan, Ajmer, Rajasthan, India
| | | | - Vishvanath Tiwari
- Department of Biochemistry, Central University of Rajasthan, Ajmer, Rajasthan, India,*Correspondence: Vishvanath Tiwari,
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Santajit S, Sookrung N, Indrawattana N. Quorum Sensing in ESKAPE Bugs: A Target for Combating Antimicrobial Resistance and Bacterial Virulence. BIOLOGY 2022; 11:biology11101466. [PMID: 36290370 PMCID: PMC9598666 DOI: 10.3390/biology11101466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/22/2022] [Accepted: 09/30/2022] [Indexed: 11/26/2022]
Abstract
A clique of Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter spp. (ESKAPE) bugs is the utmost causative agent responsible for multidrug resistance in hospital settings. These microorganisms employ a type of cell-cell communication termed 'quorum sensing (QS) system' to mediate population density and synchronously control the genes that modulate drug resistance and pathogenic behaviors. In this article, we focused on the present understanding of the prevailing QS system in ESKAPE pathogens. Basically, the QS component consisted of an autoinducer synthase, a ligand (e.g., acyl homoserine lactones/peptide hormones), and a transcriptional regulator. QS mediated expression of the bacterial capsule, iron acquisition, adherence factors, synthesis of lipopolysaccharide, poly-N-acetylglucosamine (PNAG) biosynthesis, motility, as well as biofilm development allow bacteria to promote an antimicrobial-resistant population that can escape the action of traditional drugs and endorse a divergent virulence production. The increasing prevalence of these harmful threats to infection control, as well as the urgent need for effective antimicrobial strategies to combat them, serve to highlight the important anti-QS strategies developed to address the difficulty of treating microorganisms.
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Affiliation(s)
- Sirijan Santajit
- Department of Medical Technology, School of Allied Health Sciences, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Research Center in Tropical Pathobiology, Walailak University, Nakhon Si Thammarat 80160, Thailand
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Nitat Sookrung
- Biomedical Research Incubator Unit, Department of Research, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Nitaya Indrawattana
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
- Correspondence: ; Tel.: +66-2-354-9100 (ext. 1598)
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Respiratory Depression as Antibacterial Mechanism of Linalool against Pseudomonas fragi Based on Metabolomics. Int J Mol Sci 2022; 23:ijms231911586. [PMID: 36232887 PMCID: PMC9570108 DOI: 10.3390/ijms231911586] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 09/17/2022] [Accepted: 09/26/2022] [Indexed: 11/29/2022] Open
Abstract
Linalool showed a broad-spectrum antibacterial effect, but few studies have elucidated the antibacterial mechanism of linalool on Pseudomonas fragi (P. fragi) to date. The present study aimed to uncover the antimicrobial activity and potential mechanism of linalool against P. fragi by determining key enzyme activities and metabolites combined with a high-throughput method and metabolomic pathway analysis. As a result, linalool had excellent inhibitory activity against P. fragi with MIC of 1.5 mL/L. In addition, the presence of linalool significantly altered the intracellular metabolic profile and a total of 346 differential metabolites were identified, of which 201 were up-regulated and 145 were down-regulated. The highlight pathways included beta-alanine metabolism, pantothenic acid and CoA metabolism, alanine, aspartate and glutamate metabolism, nicotinate and nicotinamide metabolism. Overall, linalool could cause metabolic disorders in cells, and the main metabolic pathways involved energy metabolism, amino acid metabolism and nucleic acid metabolism. In particular, the results of intracellular ATP content and related enzymatic activities (ATPase, SDH, and GOT) also highlighted that energy limitation and amino acid disturbance occurred intracellularly. Together, these findings provided new insights into the mechanism by which linalool inhibited P. fragi and theoretical guidance for its development as a natural preservative.
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Xiong L, Yi F, Yu Q, Huang X, Ao K, Wang Y, Xie Y. Transcriptomic analysis reveals the regulatory role of quorum sensing in the Acinetobacter baumannii ATCC 19606 via RNA-seq. BMC Microbiol 2022; 22:198. [PMID: 35971084 PMCID: PMC9380347 DOI: 10.1186/s12866-022-02612-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 08/05/2022] [Indexed: 11/29/2022] Open
Abstract
Background Acinetobacter baumannii has emerged as the major opportunistic pathogen in healthcare-associated infections with high-level antibiotic resistance and high mortality. Quorum sensing (QS) system is a cell-to-cell bacterial communication mediated by the synthesis, secretion, and binding of auto-inducer signals. It is a global regulatory system to coordinate the behavior of individual bacteria in a population. The present study focused on the QS system, aiming to investigate the regulatory role of QS in bacterial virulence and antibiotic resistance. Method The auto-inducer synthase gene abaI was deleted using the A. baumannii ATCC 19606 strain to interrupt the QS process. The RNA-seq was performed to identify the differentially expressed genes (DEGs) and pathways in the mutant (△abaI) strain compared with the wild-type (WT) strain. Results A total of 380 DEGs [the adjusted P value < 0.05 and the absolute value of log2(fold change) > log21.5] were identified, including 256 upregulated genes and 124 downregulated genes in the △abaI strain. The enrichment analysis indicated that the DEGs involved in arginine biosynthesis, purine metabolism, biofilm formation, and type VI secretion system (T6SS) were downregulated, while the DEGs involved in pathways related to fatty acid metabolism and amino acid metabolism were upregulated. Consistent with the expression change of the DEGs, a decrease in biofilm formation was observed in the △abaI strain compared with the WT strain. On the contrary, no obvious changes were found in antimicrobial resistance following the deletion of abaI. Conclusions The present study demonstrated the transcriptomic profile of A. baumannii after the deletion of abaI, revealing an important regulatory role of the QS system in bacterial virulence. The deletion of abaI suppressed the biofilm formation in A. baumannii ATCC 19606, leading to decreased pathogenicity. Further studies on the role of abaR, encoding the receptor of auto-inducer in the QS circuit, are required for a better understanding of the regulation of bacterial virulence and pathogenicity in the QS network. Supplementary Information The online version contains supplementary material available at 10.1186/s12866-022-02612-z.
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Affiliation(s)
- Li Xiong
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Fanli Yi
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Qiuju Yu
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Xiyue Huang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Keping Ao
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yuanfang Wang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yi Xie
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu, China.
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Terpenes Combinations Inhibit Biofilm Formation in Staphyloccocus aureus by Interfering with Initial Adhesion. Microorganisms 2022; 10:microorganisms10081527. [PMID: 36013945 PMCID: PMC9415918 DOI: 10.3390/microorganisms10081527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/02/2022] [Accepted: 07/07/2022] [Indexed: 11/23/2022] Open
Abstract
The biofilm is a conglomerate of cells surrounded by an extracellular matrix, which contributes to the persistence of infections. The difficulty in removing the biofilm drives the research for new therapeutic options. In this work, the effect of terpenes (−)-trans-Caryophyllene, (S)-cis-Verbenol, (S)-(−)-Limonene, (R)-(+)-Limonene, and Linalool was evaluated, individually and in combinations on bacterial growth, by assay with resazurin; the formation of biofilm, by assay with violet crystal; and the expression of associated genes, by real-time PCR, in two clinical isolates of Staphyloccocus aureus, ST30-t019 and ST5-t311, responsible for more than 90% of pediatric infections by this pathogen in Paraguay. All combinations of terpenes can inhibit biofilm formation in more than 50% without affecting bacterial growth. The most effective combination was (−)-trans-Caryophyllene and Linalool at a 500 μg/mL concentration for each, with an inhibition percentage of 88%. This combination decreased the expression levels of the sdrD, spa, agr, and hld genes associated with the initial cell adhesion stage and quorum sensing. At the same time, it increased the expression levels of the cap5B and cap5C genes related to the production of capsular polysaccharides. The combinations of compounds tested are promising alternatives to inhibit biofilm formation in S. aureus.
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17
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Citrus Essential Oils: a Treasure Trove of Antibiofilm Agent. Appl Biochem Biotechnol 2022; 194:4625-4638. [PMID: 35779176 DOI: 10.1007/s12010-022-04033-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2022] [Indexed: 11/02/2022]
Abstract
Biofilms are groups of adherent cell communities that cohere to the biotic and abiotic surfaces with the help of extracellular polymeric substances (EPS). EPS allow bacteria to form a biofilm that facilitates their binding to biotic and abiotic surfaces and provides resistance to the host immune responses and to antibiotics. There are efforts that have led to the development of natural compounds that can overcome this biofilm-mediated resistance. Essential oils (EOs) are a unique mixture of compounds that plays a key role in preventing the development of biofilm. The present overview focusses on the role of various types of citrus essential oils in acting against the biofilm, and the antibiofilm properties of natural compounds that may show an avenue to treat the multidrug-resistant bacteria.
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18
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Identification of Secondary Metabolites from Mexican Plants with Antifungal Activity against Pathogenic Candida Species. J CHEM-NY 2022. [DOI: 10.1155/2022/8631284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In the last three decades, invasive fungal infections caused by Candida species have become an important public health problem, because they are associated with high rates of morbidity and mortality in immunocompromised and hospitalized patients. The diagnosis and treatment of candidiasis are difficult and usually inefficient. Accordingly, a diversity of available drugs, currently employed to attack candidiasis, frequently induce resistance in patients promoting toxicity due to long-term treatments. Therefore, development of accurate diagnoses and novel antifungals is of high priority to improve life’s quality and expectancy of individuals infected with this pathogen. Plants are invaluable sources of new biologically active compounds. Among the plants used in Mexico in traditional herbolary medicine which have empirically been demonstrated to have antifungal activity are Pedilanthus tithymaloides, Thymus vulgaris, and Ocimum basilicum. In the present study, we analyzed whether these plants contain metabolites with antifungal activity against five Candida species. The extracts from the different plant organs were obtained by macerating them in ethyl alcohol or hexane and filtering. The obtained extracts were preserved in amber flasks at 4°C until used. The minimum inhibitory concentrations (MICs) of the active compound were determined by a microdilution assay. In addition, the following secondary metabolites were identified: linalool (3,7-dimethylocta-1,6-dien-3-ol), eugenol (4-allyl-2-methoxyphenol), limonene (1-methyl-4-(1-methylethenyl)-cyclohexene), and borneol ([(2R)-1,7,7-trimethyl-2-bicyclo[2.2.1]heptanyl] formate). All these compounds were found in the three plants, traditionally used in everyday life, and proved to be effective against Candida species and therefore a viable alternative to conventional antifungals.
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19
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Elshaer SL, Shaldam MA, Shaaban MI. Ketoprofen, Piroxicam and Indomethacin Suppressed Quorum Sensing and Virulence Factors in Acinetobacter baumannii. J Appl Microbiol 2022; 133:2182-2197. [PMID: 35503000 DOI: 10.1111/jam.15609] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/23/2022] [Accepted: 04/28/2022] [Indexed: 12/01/2022]
Abstract
AIM Quorum sensing (QS) inhibition is a promising strategy to suppress bacterial virulence, and control infection caused by Gram-negative and Gram-positive bacteria. This study explores the quorum sensing inhibiting activity of the non-steroidal anti-inflammatory drugs (NSAIDs) in Acinetobacter baumannii. METHODS AND RESULTS Ketoprofen, piroxicam, and indomethacin revealed QS inhibition via elimination of violacein production of the reporter strain Chromobacterium violaceum ATCC 12472 without affecting bacterial growth. The minimal inhibitory concentration (MIC) of ketoprofen, piroxicam, and indomethacin was determined against A. baumannii strains ATCC 17978, ATCC 19606, A1, A11, and A27 by the microbroth dilution method. The MICs of ketoprofen against tested isolates were 3.12-6.25 mg mL-1 , piroxicam MICs were 1.25-2.5 mg mL-1 , and indomethacin MICs were 3.12-12.5 mg mL-1 . Those compounds significantly inhibited QS-associated virulence factors such as biofilm formation, and surface motility, as well as, significantly increased bacterial tolerance to oxidative stress without affecting bacterial growth. On the molecular level, the three compounds significantly inhibited the transcription of QS regulatory genes abaI/abaR, and biofilm regulated genes cusD, and pgaB. Molecular docking analysis revealed potent binding affinity of the three compounds with AbaI via hydrogen and/or hydrophobic bonds. CONCLUSION These results indicate that NSAIDs, ketoprofen, piroxicam, and indomethacin, could be potential inhibitors of the QS and could suppress the QS-related virulence factors of A. baumannii. SIGNIFICANCE AND IMPACT Ketoprofen, piroxicam, and indomethacin could provide promising implications and strategies for combating the virulence, and pathogenesis of A. baumannii.
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Affiliation(s)
- Soha Lotfy Elshaer
- Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura University, 35516, Egypt
| | - Moataz A Shaldam
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Kafrelsheikh University, Kafr El Sheikh 33516, Egypt
| | - Mona I Shaaban
- Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura University, 35516, Egypt
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Mechanisms, Anti-Quorum-Sensing Actions, and Clinical Trials of Medicinal Plant Bioactive Compounds against Bacteria: A Comprehensive Review. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27051484. [PMID: 35268585 PMCID: PMC8911727 DOI: 10.3390/molecules27051484] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/16/2022] [Accepted: 02/17/2022] [Indexed: 01/18/2023]
Abstract
Bacterial strains have developed an ability to resist antibiotics via numerous mechanisms. Recently, researchers conducted several studies to identify natural bioactive compounds, particularly secondary metabolites of medicinal plants, such as terpenoids, flavonoids, and phenolic acids, as antibacterial agents. These molecules exert several mechanisms of action at different structural, cellular, and molecular levels, which could make them candidates or lead compounds for developing natural antibiotics. Research findings revealed that these bioactive compounds can inhibit the synthesis of DNA and proteins, block oxidative respiration, increase membrane permeability, and decrease membrane integrity. Furthermore, recent investigations showed that some bacterial strains resist these different mechanisms of antibacterial agents. Researchers demonstrated that this resistance to antibiotics is linked to a microbial cell-to-cell communication system called quorum sensing (QS). Consequently, inhibition of QS or quorum quenching is a promising strategy to not only overcome the resistance problems but also to treat infections. In this respect, various bioactive molecules, including terpenoids, flavonoids, and phenolic acids, exhibit numerous anti-QS mechanisms via the inhibition of auto-inducer releases, sequestration of QS-mediated molecules, and deregulation of QS gene expression. However, clinical applications of these molecules have not been fully covered, which limits their use against infectious diseases. Accordingly, the aim of the present work was to discuss the role of the QS system in bacteria and its involvement in virulence and resistance to antibiotics. In addition, the present review summarizes the most recent and relevant literature pertaining to the anti-quorum sensing of secondary metabolites and its relationship to antibacterial activity.
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Rafey A, Batool A, Kamran M, Khan S, Akram M, Shah S, Amin A. Chemical profile and antiperiodontal potential of Thymus linearis Benth. Essential oil using ADMET prediction, In silico and in vitro tools. MAIN GROUP CHEMISTRY 2021. [DOI: 10.3233/mgc-210115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Periodontitis is an important health concern that is associated with long term complications. Development of resistance to antibiotics limits the treatment options in periodontitis. We investigated Thymus linearis essential oil for treatment of periodontitis. The essential oil was collected using hydrodistillation and characterized using GC-MS. The constituents were further analyzed for druglikeness, ADMET properties and molecular docking using transcription regulators 2UV0 and 3QP5. The GC-MS results revealed that carvacrol was a major constituent (76.26%) followed by caryophyllene oxide (6.83%) and L-borneol (6.08%). The in vitro antimicrobial studies showed significant inhibition against Staphylococcus aureus, Staphylococcus epidermidis and Pseudomonas aeruginosa (MIC range 0.024 –0.312μg/mL). The essential oil showed a good inhibition of bacterial biofilm produced by S. aureus (72%) and S. epidermidis (70%). Finally, the antiquorum sensing property (30 mm zone of inhibition) was recorded with violacein inhibition (58%). Based on in silico and in vitro findings, it was concluded that T. linearis essential oil can be used for the treatment of periodontal infections.
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Affiliation(s)
- Abdul Rafey
- NPRL, Gomal Centre of Pharmaceutical Sciences, Faculty of Pharmacy, Gomal University, D.I.Khan, Pakistan
| | - Aqsa Batool
- NPRL, Gomal Centre of Pharmaceutical Sciences, Faculty of Pharmacy, Gomal University, D.I.Khan, Pakistan
- Gomal Centre of Biochemistry and Biotechnology (GCBB), Gomal University, D.I.Khan, Pakistan
| | - Muhammad Kamran
- NPRL, Gomal Centre of Pharmaceutical Sciences, Faculty of Pharmacy, Gomal University, D.I.Khan, Pakistan
- Gomal Centre of Biochemistry and Biotechnology (GCBB), Gomal University, D.I.Khan, Pakistan
| | - Samiullah Khan
- Gomal Centre of Biochemistry and Biotechnology (GCBB), Gomal University, D.I.Khan, Pakistan
| | - Muhammad Akram
- Pakistan Council for Scientific and Industrial Research (PCSIR), Peshawar, Pakistan
| | - Sheefatullah Shah
- SRDDR Lab Gomal Centre of Pharmaceutical Sciences, Faculty of Pharmacy, Gomal University, D.I.Khan, Pakistan
| | - Adnan Amin
- NPRL, Gomal Centre of Pharmaceutical Sciences, Faculty of Pharmacy, Gomal University, D.I.Khan, Pakistan
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22
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An Q, Ren JN, Li X, Fan G, Qu SS, Song Y, Li Y, Pan SY. Recent updates on bioactive properties of linalool. Food Funct 2021; 12:10370-10389. [PMID: 34611674 DOI: 10.1039/d1fo02120f] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Natural products, including essential oils and their components, have been used for their bioactivities. Linalool (2,6-dimethyl-2,7-octadien-6-ol) is an aromatic monoterpene alcohol that is widely found in essential oils and is broadly used in perfumes, cosmetics, household cleaners and food additives. This review covers the sources, physicochemical properties, application, synthesis and bioactivities of linalool. The present study focuses on the bioactive properties of linalool, including anticancer, antimicrobial, neuroprotective, anxiolytic, antidepressant, anti-stress, hepatoprotective, renal protective, and lung protective activity and the underlying mechanisms. Besides this, the therapeutic potential of linalool and the prospect of encapsulating linalool are also discussed. Linalool can induce apoptosis of cancer cells via oxidative stress, and at the same time protects normal cells. Linalool exerts antimicrobial effects through disruption of cell membranes. The protective effects of linalool to the liver, kidney and lung are owing to its anti-inflammatory activity. On account of its protective effects and low toxicity, linalool can be used as an adjuvant of anticancer drugs or antibiotics. Therefore, linalool has a great potential to be applied as a natural and safe alternative therapeutic.
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Affiliation(s)
- Qi An
- College of Food Science and Technology, Huazhong Agricultural University, Key Laboratory of Environment Correlative Dietology of Ministry of Education, Wuhan, 430070, China.
| | - Jing-Nan Ren
- College of Food Science and Technology, Huazhong Agricultural University, Key Laboratory of Environment Correlative Dietology of Ministry of Education, Wuhan, 430070, China.
| | - Xiao Li
- College of Food Science and Technology, Huazhong Agricultural University, Key Laboratory of Environment Correlative Dietology of Ministry of Education, Wuhan, 430070, China.
| | - Gang Fan
- College of Food Science and Technology, Huazhong Agricultural University, Key Laboratory of Environment Correlative Dietology of Ministry of Education, Wuhan, 430070, China.
| | - Sha-Sha Qu
- College of Food Science and Technology, Huazhong Agricultural University, Key Laboratory of Environment Correlative Dietology of Ministry of Education, Wuhan, 430070, China.
| | - Yue Song
- College of Food Science and Technology, Huazhong Agricultural University, Key Laboratory of Environment Correlative Dietology of Ministry of Education, Wuhan, 430070, China.
| | - Yang Li
- College of Food Science and Technology, Huazhong Agricultural University, Key Laboratory of Environment Correlative Dietology of Ministry of Education, Wuhan, 430070, China.
| | - Si-Yi Pan
- College of Food Science and Technology, Huazhong Agricultural University, Key Laboratory of Environment Correlative Dietology of Ministry of Education, Wuhan, 430070, China.
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Lazar V, Holban AM, Curutiu C, Chifiriuc MC. Modulation of Quorum Sensing and Biofilms in Less Investigated Gram-Negative ESKAPE Pathogens. Front Microbiol 2021; 12:676510. [PMID: 34394026 PMCID: PMC8359898 DOI: 10.3389/fmicb.2021.676510] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 06/30/2021] [Indexed: 01/20/2023] Open
Abstract
Pathogenic bacteria have the ability to sense their versatile environment and adapt by behavioral changes both to the external reservoirs and the infected host, which, in response to microbial colonization, mobilizes equally sophisticated anti-infectious strategies. One of the most important adaptive processes is the ability of pathogenic bacteria to turn from the free, floating, or planktonic state to the adherent one and to develop biofilms on alive and inert substrata; this social lifestyle, based on very complex communication networks, namely, the quorum sensing (QS) and response system, confers them an increased phenotypic or behavioral resistance to different stress factors, including host defense mechanisms and antibiotics. As a consequence, biofilm infections can be difficult to diagnose and treat, requiring complex multidrug therapeutic regimens, which often fail to resolve the infection. One of the most promising avenues for discovering novel and efficient antibiofilm strategies is targeting individual cells and their QS mechanisms. A huge amount of data related to the inhibition of QS and biofilm formation in pathogenic bacteria have been obtained using the well-established gram-positive Staphylococcus aureus and gram-negative Pseudomonas aeruginosa models. The purpose of this paper was to revise the progress on the development of antibiofilm and anti-QS strategies in the less investigated gram-negative ESKAPE pathogens Klebsiella pneumoniae, Acinetobacter baumannii, and Enterobacter sp. and identify promising leads for the therapeutic management of these clinically significant and highly resistant opportunistic pathogens.
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Affiliation(s)
- Veronica Lazar
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, Bucharest, Romania
- The Research Institute of the University of Bucharest, Bucharest, Romania
| | - Alina Maria Holban
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, Bucharest, Romania
- The Research Institute of the University of Bucharest, Bucharest, Romania
| | - Carmen Curutiu
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, Bucharest, Romania
- The Research Institute of the University of Bucharest, Bucharest, Romania
| | - Mariana Carmen Chifiriuc
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, Bucharest, Romania
- The Research Institute of the University of Bucharest, Bucharest, Romania
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Pompilio A, Scribano D, Sarshar M, Di Bonaventura G, Palamara AT, Ambrosi C. Gram-Negative Bacteria Holding Together in a Biofilm: The Acinetobacter baumannii Way. Microorganisms 2021; 9:microorganisms9071353. [PMID: 34206680 PMCID: PMC8304980 DOI: 10.3390/microorganisms9071353] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/14/2021] [Accepted: 06/18/2021] [Indexed: 12/24/2022] Open
Abstract
Bacterial biofilms are a serious public-health problem worldwide. In recent years, the rates of antibiotic-resistant Gram-negative bacteria associated with biofilm-forming activity have increased worrisomely, particularly among healthcare-associated pathogens. Acinetobacter baumannii is a critically opportunistic pathogen, due to the high rates of antibiotic resistant strains causing healthcare-acquired infections (HAIs). The clinical isolates of A. baumannii can form biofilms on both biotic and abiotic surfaces; hospital settings and medical devices are the ideal environments for A. baumannii biofilms, thereby representing the main source of patient infections. However, the paucity of therapeutic options poses major concerns for human health infections caused by A. baumannii strains. The increasing number of multidrug-resistant A. baumannii biofilm-forming isolates in association with the limited number of biofilm-eradicating treatments intensify the need for effective antibiofilm approaches. This review discusses the mechanisms used by this opportunistic pathogen to form biofilms, describes their clinical impact, and summarizes the current and emerging treatment options available, both to prevent their formation and to disrupt preformed A. baumannii biofilms.
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Affiliation(s)
- Arianna Pompilio
- Center for Advanced Studies and Technology (CAST), Department of Medical, Oral and Biotechnological Sciences, Service of Clinical Microbiology, “G. d’Annunzio” University of Chieti-Pescara, 66100 Chieti, Italy; (A.P.); (G.D.B.)
| | - Daniela Scribano
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, 00185 Rome, Italy;
- Dani Di Giò Foundation-Onlus, 00193 Rome, Italy
| | - Meysam Sarshar
- Research Laboratories, Bambino Gesù Children’s Hospital, IRCCS, 00146 Rome, Italy;
| | - Giovanni Di Bonaventura
- Center for Advanced Studies and Technology (CAST), Department of Medical, Oral and Biotechnological Sciences, Service of Clinical Microbiology, “G. d’Annunzio” University of Chieti-Pescara, 66100 Chieti, Italy; (A.P.); (G.D.B.)
| | - Anna Teresa Palamara
- Department of Infectious Diseases, Istituto Superiore di Sanità, 00161 Rome, Italy;
- Laboratory Affiliated to Institute Pasteur Italia-Cenci Bolognetti Foundation, Department of Public Health and Infectious Diseases, Sapienza University of Rome, 00185 Rome, Italy
| | - Cecilia Ambrosi
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Open University, IRCCS, 00166 Rome, Italy
- Correspondence:
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25
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Bamunuarachchi NI, Khan F, Kim YM. Inhibition of Virulence Factors and Biofilm Formation of Acinetobacter Baumannii by Naturally-derived and Synthetic Drugs. Curr Drug Targets 2021; 22:734-759. [PMID: 33100201 DOI: 10.2174/1389450121666201023122355] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 09/17/2020] [Accepted: 09/22/2020] [Indexed: 11/22/2022]
Abstract
Acinetobacter baumannii is a gram-negative, aerobic, non-motile, and pleomorphic bacillus. A. baumannii is also a highly-infectious pathogen causing high mortality and morbidity rates in intensive care units. The discovery of novel agents against A. baumannii infections is urgently needed due to the emergence of drug-resistant A. baumannii strains and the limited number of efficacious antibiotics available for treatment. In addition to the production of several virulence factors, A. baumannii forms biofilms on the host cell surface as well. Formation of biofilms occurs through initial surface attachment, microcolony formation, biofilm maturation, and detachment stages, and is one of the major drug resistance mechanisms employed by A. baumannii. Several studies have previously reported the efficacy of naturally-derived and synthetic compounds as anti- biofilm and anti-virulence agents against A. baumannii. Here, inhibition of biofilm formation and virulence factors of A. baumannii using naturally-derived and synthetic compounds are reviewed.
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Affiliation(s)
| | - Fazlurrahman Khan
- Institute of Food Science, Pukyong National University, Busan 48513, South Korea
| | - Young-Mog Kim
- Department of Food Science and Technology, Pukyong National University, Busan 48513, South Korea
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26
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Porras G, Chassagne F, Lyles JT, Marquez L, Dettweiler M, Salam AM, Samarakoon T, Shabih S, Farrokhi DR, Quave CL. Ethnobotany and the Role of Plant Natural Products in Antibiotic Drug Discovery. Chem Rev 2021; 121:3495-3560. [PMID: 33164487 PMCID: PMC8183567 DOI: 10.1021/acs.chemrev.0c00922] [Citation(s) in RCA: 124] [Impact Index Per Article: 41.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The crisis of antibiotic resistance necessitates creative and innovative approaches, from chemical identification and analysis to the assessment of bioactivity. Plant natural products (NPs) represent a promising source of antibacterial lead compounds that could help fill the drug discovery pipeline in response to the growing antibiotic resistance crisis. The major strength of plant NPs lies in their rich and unique chemodiversity, their worldwide distribution and ease of access, their various antibacterial modes of action, and the proven clinical effectiveness of plant extracts from which they are isolated. While many studies have tried to summarize NPs with antibacterial activities, a comprehensive review with rigorous selection criteria has never been performed. In this work, the literature from 2012 to 2019 was systematically reviewed to highlight plant-derived compounds with antibacterial activity by focusing on their growth inhibitory activity. A total of 459 compounds are included in this Review, of which 50.8% are phenolic derivatives, 26.6% are terpenoids, 5.7% are alkaloids, and 17% are classified as other metabolites. A selection of 183 compounds is further discussed regarding their antibacterial activity, biosynthesis, structure-activity relationship, mechanism of action, and potential as antibiotics. Emerging trends in the field of antibacterial drug discovery from plants are also discussed. This Review brings to the forefront key findings on the antibacterial potential of plant NPs for consideration in future antibiotic discovery and development efforts.
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Affiliation(s)
- Gina Porras
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
| | - François Chassagne
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
| | - James T. Lyles
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
| | - Lewis Marquez
- Molecular and Systems Pharmacology Program, Laney Graduate School, Emory University, 615 Michael St., Whitehead 115, Atlanta, Georgia 30322
| | - Micah Dettweiler
- Department of Dermatology, Emory University, 615 Michael St., Whitehead 105L, Atlanta, Georgia 30322
| | - Akram M. Salam
- Molecular and Systems Pharmacology Program, Laney Graduate School, Emory University, 615 Michael St., Whitehead 115, Atlanta, Georgia 30322
| | - Tharanga Samarakoon
- Emory University Herbarium, Emory University, 1462 Clifton Rd NE, Room 102, Atlanta, Georgia 30322
| | - Sarah Shabih
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
| | - Darya Raschid Farrokhi
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
| | - Cassandra L. Quave
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
- Emory University Herbarium, Emory University, 1462 Clifton Rd NE, Room 102, Atlanta, Georgia 30322
- Department of Dermatology, Emory University, 615 Michael St., Whitehead 105L, Atlanta, Georgia 30322
- Molecular and Systems Pharmacology Program, Laney Graduate School, Emory University, 615 Michael St., Whitehead 115, Atlanta, Georgia 30322
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27
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Zhong S, He S. Quorum Sensing Inhibition or Quenching in Acinetobacter baumannii: The Novel Therapeutic Strategies for New Drug Development. Front Microbiol 2021; 12:558003. [PMID: 33597937 PMCID: PMC7882596 DOI: 10.3389/fmicb.2021.558003] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 01/06/2021] [Indexed: 01/01/2023] Open
Abstract
Acinetobacter baumannii is a Gram-negative opportunistic nosocomial pathogen, which can cause ventilator-related and blood infection in critically ill patients. The resistance of A. baumannii clinical isolates to common antimicrobials and their tolerance to desiccation have emerged as a serious problem to public health. In the process of pathogenesis, bacteria release signals, which regulate virulence and pathogenicity-related genes. Such bacteria coordinate their virulent behavior in a cell density-dependent phenomenon called quorum sensing (QS). In contrast, the two main approaches of QS interference, quorum sensing inhibitors (QSIs) and quorum quenching (QQ) enzymes, have been developed to reduce the virulence of bacteria, thus reducing the pressure to produce bacterial drug resistance. Therefore, QSIs or QQ enzymes, which interfere with these processes, might potentially inhibit bacterial QS and ultimately biofilm formation. In this review, we aim to describe the state-of-art in the QS process in A. baumannii and elaborate on the use of QSIs or QQ enzymes as antimicrobial drugs in various potential sites of the QS pathway.
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Affiliation(s)
- Shan Zhong
- Department of Acupuncture, Guilin Hospital of Traditional Chinese Medicine, Guilin, China
| | - Songzhe He
- Department of Clinical Laboratory, Affiliated Hospital of Guilin Medical University, Guilin, China.,Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou, China
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28
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Farnesane-Type Sesquiterpenoids with Antibiotic Activity from Chiliadenus lopadusanus. Antibiotics (Basel) 2021; 10:antibiotics10020148. [PMID: 33540688 PMCID: PMC7913021 DOI: 10.3390/antibiotics10020148] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 01/25/2021] [Accepted: 01/28/2021] [Indexed: 02/04/2023] Open
Abstract
Chiliadenus lopadusanus Brullo is an Asteraceae plant species endemic to Lampedusa island, the largest island of the Pelage archipelago, Italy. The organic extract of its whole aerial parts, showing antibiotic activity against Staphylococcus aureus and Acinetobacter baumannii, wasfractionated employing bioguided purification procedures affording three main farnesane-type sesquiterpenoids. They were identified by spectroscopic methods (NMR and ESIMS data) as the (E)-3,7,11-trimethyldodeca-1,6,10-triene-3,9-diol, (E)-10-hydroxy-2,6,10-trimethyldodeca-2,6,11- trien-4-one and (E)-10-hydroxy-2,6,10-trimethyl-dodeca-6,11-dien-4-one, commonly named 9-hydroxynerolidol, 9-oxonerolidol, and chiliadenol B, respectively. These three sesquiterpenes, isolated for the first time from C. lopadusanus, were tested on methicillin-resistant S. aureus and A. baumannii showing antibacterial and antibiofilm activities. This plant could be used as a source to isolate secondary metabolites as potential new antibiotics.
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29
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Su T, Qiu Y, Hua X, Ye B, Luo H, Liu D, Qu P, Qiu Z. Novel Opportunity to Reverse Antibiotic Resistance: To Explore Traditional Chinese Medicine With Potential Activity Against Antibiotics-Resistance Bacteria. Front Microbiol 2020; 11:610070. [PMID: 33414777 PMCID: PMC7782309 DOI: 10.3389/fmicb.2020.610070] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 12/07/2020] [Indexed: 12/13/2022] Open
Abstract
Antibiotic resistance is becoming significantly prominent and urgent in clinical practice with the increasing and wide application of antibacterial drugs. However, developing and synthesizing new antimicrobial drugs is costly and time-consuming. Recently, researchers shifted their sights to traditional Chinese medicine (TCM). Here, we summarized the inhibitory mechanism of TCM herbs and their active ingredients on bacteria, discussed the regulatory mechanism of TCM on antibiotic-resistant bacteria, and revealed preclinical results of TCM herbs and their active components against antibiotic-resistant bacteria in mouse models. Those data suggest that TCM herbs and their effective constituents exhibit potential blockage ability on antibiotic-resistant bacteria, providing novel therapeutic ideas for reversing antibiotic resistance.
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Affiliation(s)
- Ting Su
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
| | - Ye Qiu
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
| | - Xuesi Hua
- College of Literature, Science and Arts University of Michigan, Ann Arbor, MI, United States
| | - Bi Ye
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
| | - Haoming Luo
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
| | - Da Liu
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
| | - Peng Qu
- National Cancer Institute, Frederick, MD, United States
| | - Zhidong Qiu
- College of Pharmacy Changchun University of Chinese Medicine, Changchun, China
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30
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Alcohol dehydrogenase modulates quorum sensing in biofilm formations of Acinetobacter baumannii. Microb Pathog 2020; 148:104451. [PMID: 32805359 DOI: 10.1016/j.micpath.2020.104451] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 08/09/2020] [Accepted: 08/10/2020] [Indexed: 01/24/2023]
Abstract
Acinetobacter baumannii (A. baumannii) is a common opportunistic nosocomial pathogen, which is able to produce biofilms on the surface of indwelling medical devices, and consequentially causes severe infections in clinical settings. In order to identify genes that involved in the biofilm formation of A. baumannii, the differential expression of genes between biofilms and planktonic cells was analyzed by RNAseq assay and validated in clinical isolates. The RNAseq data showed that 264 genes were up-regulated, while 240 genes were down-regulated in the biofilms of A. baumannii. Among them, the gene encoding alcohol dehydrogenase (ADH), a known molecule of bacterial quorum sensing (QS) system that plays a key role in biofilm formation bacteria, was one of the most up-regulated gene in both reference strains and clinical isolates. Functional studies using ADH inhibitor disulfiram and activator taurine further demonstrated that the presence of disulfiram significantly inhibit the cell growth, motility and biofilm formation, paralleled by a decreased expression of QS-related genes, including AbaI, A1S_0109, and A1S_0112, in a dose-dependent manner; vice versa, the addition of ADH activator taurine, and QS molecule C12- homoserine lactone synthase (HSL) led a dose-dependent increase of bacterial growth, motility and biofilm production, along with an increased expression of QS-related genes in both reference strains and clinical isolates of A. baumannii. These results suggested that the ADH was a key molecule able to modulate the QS system and promote the biofilm formation, growth and motility in A. baumannii.
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31
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Zaccai M, Yarmolinsky L, Khalfin B, Budovsky A, Gorelick J, Dahan A, Ben-Shabat S. Medicinal Properties of Lilium candidum L. and Its Phytochemicals. PLANTS 2020; 9:plants9080959. [PMID: 32751398 PMCID: PMC7465089 DOI: 10.3390/plants9080959] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 07/26/2020] [Accepted: 07/27/2020] [Indexed: 01/07/2023]
Abstract
Lilium candidum L., known as Madonna, meadow, or white lily, is a bulbous plant from the Liliaceae family, originating in the Middle East. L. candidum has been abundantly used in folk medicine since ancient times to relieve a variety of ailments, including age-related diseases, burns, ulcers, and coughs. The aim of this article is to investigate the anti-inflammatory and anti-diabetic activities of L. candidum extracts and its active phytochemicals. Some active volatile phytochemicals were identified using gas chromatography–mass spectrometry (GC-MS) analysis. Significant (p < 0.001) anti-diabetic properties of the extracts kaempferol, linalool, citronellal, and humulene were demonstrated by an elevation in glucose uptake by adipocytes. The significant (p < 0.01) effect of the plant extracts kaempferol, citronellal, and humulene on the secretion of pro-inflammatory cytokines interleukin 6 (IL-6) and interleukin 8 (IL-8) was demonstrated using enzyme-linked immunosorbent assay. Altogether, L. candidum and its rich collection of phytochemicals hold promising medicinal potential, and further investigations of its therapeutic prospects are encouraged.
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Affiliation(s)
- Michele Zaccai
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel;
| | | | - Boris Khalfin
- Eastern R&D Center, Kiryat Arba 9010000, Israel; (L.Y.); (B.K.); (J.G.)
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel;
| | - Arie Budovsky
- Research & Development Authority, Barzilai University Medical Center, Ashkelon 7830604, Israel;
| | - Jonathan Gorelick
- Eastern R&D Center, Kiryat Arba 9010000, Israel; (L.Y.); (B.K.); (J.G.)
| | - Arik Dahan
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel;
| | - Shimon Ben-Shabat
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel;
- Correspondence: ; Tel.: +972-54-599-1056
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32
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Pejčić M, Stojanović-Radić Z, Genčić M, Dimitrijević M, Radulović N. Anti-virulence potential of basil and sage essential oils: Inhibition of biofilm formation, motility and pyocyanin production of Pseudomonas aeruginosa isolates. Food Chem Toxicol 2020; 141:111431. [PMID: 32417365 DOI: 10.1016/j.fct.2020.111431] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 05/03/2020] [Accepted: 05/07/2020] [Indexed: 01/20/2023]
Abstract
The effects of basil (Ocimum basilicum) and sage (Salvia officinalis) essential oils on selected virulence factors (biofilm formation, mature biofilm resistance, motility, and pyocyanin production) of Pseudomonas aeruginosa clinical isolates were evaluated in the present study for the first time. The two essential oils were chemically characterized by GC and GC-MS analyses. Linalool and (E)-anethole were found to be the main components of the investigated basil oil, while α-thujone and camphor were the major constituents of the studied sage essential oil. The oils inhibited biofilm formation up to 99.9% vs control, and significant reductions (74.7-99.9%) were also noted when the oils were applied to mature biofilms. Likewise, swimming, swarming, and twitching motility patterns were highly affected by both oils. The basil and sage oils reduced pyocyanin production by 13.32-55.6% and 5.0-58.7%, respectively. Thus, basil and sage essential oils are potentially highly efficient antipseudomonal agents that could be used against both acute and chronic infections.
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Affiliation(s)
- Milica Pejčić
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, Niš, Serbia
| | - Zorica Stojanović-Radić
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, Niš, Serbia.
| | - Marija Genčić
- Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, Niš, Serbia
| | - Marina Dimitrijević
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, Niš, Serbia
| | - Niko Radulović
- Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, Niš, Serbia
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33
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Anane YA, Apalata T, Vasaikar S, Okuthe GE, Songca SP. In vitro antimicrobial photodynamic inactivation of multidrug-resistant Acinetobacter baumannii biofilm using Protoporphyrin IX and Methylene blue. Photodiagnosis Photodyn Ther 2020; 30:101752. [PMID: 32289462 DOI: 10.1016/j.pdpdt.2020.101752] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/19/2020] [Accepted: 03/27/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Acinetobacter baumannii is a challenging pathogen due to the rapid development of antimicrobial resistance and biofilm formation. The objective of this study was to evaluate the effect of antimicrobial photodynamic inactivation against biofilms of multidrug-resistant A. baumannii isolated from clinical, abattoir and aquatic sources. METHODS The isolates were tested for susceptibility to imipenem, meropenem, tigecycline and colistin using autoSCAN-4 automated system and rechecked by the E-test. Methylene blue, Protoporphyrin IX, and a halogen lamp were used in the in vitro assay against biofilms of the isolates. The antimicrobial photodynamic inactivation was assessed by counting colony-forming units (CFU). RESULTS The isolates from abattoir and aquatic sources were resistant to carbapenems (>64 μg/mL) but susceptible to tigecycline (2 μg/mL) and colistin (Abattoir, 0.35 μg/mL and Aquatic, 0.24 μg/mL), whereas the clinical isolate was susceptible to only colistin (0.5 μg/mL) using the E-test. The log survival percentages of the control group at a concentration of 20 μM were 5 × 10-6 % for Protoporphyrin IX and 2 × 10-6 % for Methylene blue. Therefore, Methylene blue showed higher bacterial reduction of 7.0 log10 colony forming units than 6.0 log10 for Protoporphyrin IX. No significant difference was observed with respect to the origin of isolates and the minimum inhibitory concentrations. CONCLUSION The results indicate that antimicrobial photodynamic inactivation could be an alternative strategy for the control of infections caused by multi-drug resistant A. baumannii by significantly reducing biofilm growth at a sub-lethal concentrations.
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Affiliation(s)
- Yaw Adjei Anane
- Division of Medical Microbiology, Department of Laboratory Medicine and Pathology, Faculty of Health Sciences, Walter Sisulu University, Private Bag: X1, Mthatha, 5117 Eastern Cape Province, South Africa.
| | - Teke Apalata
- Division of Medical Microbiology, Department of Laboratory Medicine and Pathology, Faculty of Health Sciences, Walter Sisulu University, Private Bag: X1, Mthatha, 5117 Eastern Cape Province, South Africa; Division of Medical Microbiology, National Health Laboratory Services (NHLS), Nelson Mandela Central Hospital, Mthatha 5100, South Africa.
| | - Sandeep Vasaikar
- Division of Medical Microbiology, Department of Laboratory Medicine and Pathology, Faculty of Health Sciences, Walter Sisulu University, Private Bag: X1, Mthatha, 5117 Eastern Cape Province, South Africa; Division of Medical Microbiology, National Health Laboratory Services (NHLS), Nelson Mandela Central Hospital, Mthatha 5100, South Africa
| | - Grace Emily Okuthe
- Department of Biological & Environmental Sciences, Walter Sisulu University, Private Bag: X1, Mthatha, 5117 Eastern Cape Province, South Africa.
| | - Sandile Phinda Songca
- School of Chemistry and Physics, College of Agriculture Engineering and Science, University of KwaZulu-Natal, 2nd Floor, Francis Stock Building, Howard College Campus, UKZN, Durban, 4041, South Africa.
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34
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Zhang D, Gan RY, Zhang JR, Farha AK, Li HB, Zhu F, Wang XH, Corke H. Antivirulence properties and related mechanisms of spice essential oils: A comprehensive review. Compr Rev Food Sci Food Saf 2020; 19:1018-1055. [PMID: 33331691 DOI: 10.1111/1541-4337.12549] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 01/09/2020] [Accepted: 01/30/2020] [Indexed: 12/19/2022]
Abstract
In recent decades, reduced antimicrobial effectiveness, increased bacterial infection, and newly emerged microbial resistance have become global public issues, leading to an urgent need to find effective strategies to counteract these problems. Strategies targeting bacterial virulence factors rather than bacterial survival have attracted increasing interest, since the modulation of virulence factors may prevent the development of drug resistance in bacteria. Spices are promising natural sources of antivirulence compounds owing to their wide availability, diverse antivirulence phytochemical constituents, and generally favorable safety profiles. Essential oils are the predominant and most important antivirulence components of spices. This review addresses the recent efforts of using spice essential oils to inhibit main bacterial virulence traits, including the quorum sensing system, biofilm formation, motility, and toxin production, with an intensive discussion of related mechanisms. We hope that this review can provide a better understanding of the antivirulence properties of spice essential oils, which have the potential to be used as antibiotic alternatives by targeting bacterial virulence.
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Affiliation(s)
- Dan Zhang
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Ren-You Gan
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China.,Research Center for Plants and Human Health, Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu, China
| | - Jia-Rong Zhang
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Arakkaveettil Kabeer Farha
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Hua-Bin Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou, China
| | - Fan Zhu
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Xiao-Hong Wang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Harold Corke
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
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Shin B, Park C, Park W. Stress responses linked to antimicrobial resistance in Acinetobacter species. Appl Microbiol Biotechnol 2020; 104:1423-1435. [DOI: 10.1007/s00253-019-10317-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 12/09/2019] [Accepted: 12/13/2019] [Indexed: 11/25/2022]
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Kim UJ, Kim CM, Jang SJ, Lee SB, Cho SS, Jeong SH, Ko YJ, Kang SH, Park G, Kim DM, Yoon NR, Ahn YJ, Lim DH, Kook JK. Evaluation of Synergistic Effect of Combined Treatment with Linalool and Colistin on Multidrug-Resistant Acinetobacter baumannii to Expand Candidate for Therapeutic Option. ANNALS OF CLINICAL MICROBIOLOGY 2020. [DOI: 10.5145/acm.2020.23.1.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Ung-Jun Kim
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Choon-Mee Kim
- Premedical Science, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Sook-Jin Jang
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Seul-Bi Lee
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Seong-Sik Cho
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Seok-Hoon Jeong
- Department of Laboratory Medicine and Research Institute of Antimicrobial Resistance, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Young-Jin Ko
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Seong-Ho Kang
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Geon Park
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Dong-Min Kim
- Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Na-Ra Yoon
- Department of Internal Medicine, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Young-Joon Ahn
- Department of Medical Education, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Dong-hoon Lim
- Department of Urology, College of Medicine, Chosun University, Gwangju, Republic of Korea
| | - Joong-Ki Kook
- Korean Collection for Oral Microbiology and Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwang-Ju, Republic of Korea
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Wang W, Li D, Huang X, Yang H, Qiu Z, Zou L, Liang Q, Shi Y, Wu Y, Wu S, Yang C, Li Y. Study on Antibacterial and Quorum-Sensing Inhibition Activities of Cinnamomum camphora Leaf Essential Oil. Molecules 2019; 24:molecules24203792. [PMID: 31640286 PMCID: PMC6832878 DOI: 10.3390/molecules24203792] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 10/18/2019] [Accepted: 10/19/2019] [Indexed: 12/22/2022] Open
Abstract
Many essential oils (EOs) regulate the quorum-sensing (QS) system of pathogens and inhibit the virulence expression. Interference with QS can potentially reduce bacterial multidrug resistance and aid the biological control of bacterial disease. In the present work, the antibacterial and anti-QS activities of Cinnamomum camphora leaf EO were investigated. A total of 23 chemical components with relative levels ≥0.11%, including a large number of terpene compounds, were identified in C. camphora leaf EO by gas chromatography-mass spectrometry (GC-MS). The principal component was linalool, followed by eucalyptol, with relative levels of 51.57% and 22.07%, respectively. The minimum inhibitory concentration (MIC) and antibacterial activity of C. camphora EO were examined, and P. aeruginosa and E. coli ATCC25922 showed the highest and lowest sensitivity to C. camphora EO, respectively. Tests of QS inhibitory activity revealed that C. camphora EO significantly decreased the production of violacein and biofilm biomass in C. violaceum, with the maximum inhibition rates of 63% and 77.64%, respectively, and inhibited the biofilm formation and swarming movement, independent of affecting the growth of C. violaceum. Addition of C. camphora EO also resulted in downregulation of the expression of the acyl-homoserine lactones (AHL) synthesis gene (cviI) and transcription regulator (cviR), and inhibited the expression of QS-regulated virulence genes, including vioA, vioB, vioC, vioD, vioE, lasA, lasB, pilE3, and hmsHNFR. Collectively, the prominent antibacterial activity and anti-QS activities clearly support that C. camphora EO acts as a potential antibacterial agent and QS inhibitor in the prevention of bacterial contamination.
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Affiliation(s)
- Wenting Wang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Dongxiang Li
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Xiaoqin Huang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Huixiang Yang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Ziwen Qiu
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Liting Zou
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Qin Liang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Yu Shi
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Yingxiang Wu
- Qingyuan Agricultural Science and Technology Extension Service Center, Qingyuan 511518, China.
| | - Shaohua Wu
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Chao Yang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Yongyu Li
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
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Sowndarya J, Farisa Banu S, Madhura G, Yuvalakshmi P, Rubini D, Bandeira Junior G, Baldisserotto B, Vadivel V, Nithyanand P. Agro food by-products and essential oil constituents curtail virulence and biofilm of Vibrio harveyi. Microb Pathog 2019; 135:103633. [PMID: 31326562 DOI: 10.1016/j.micpath.2019.103633] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 07/17/2019] [Accepted: 07/17/2019] [Indexed: 02/02/2023]
Abstract
Vibrio harveyi causes severe loss to the aquaculture industry due to its virulence, which is mediated by Quorum sensing (QS) and biofilm formation. In the current study, we have explored the anti-virulent properties and biofilm disruption ability of luteolin (extracted from coconut shell) and linalool against this important aquaculture pathogen. HPLC analysis of the methanolic extract of coconut shells revealed a single major peak which matched to the standard luteolin which was further elucidated by NMR studies. Further, luteolin and linalool were screened for their ability to inhibit biofilms and various quorum sensing mediated virulence factors of V. harveyi. The Minimum Inhibitory Concentration (MIC) of the two compounds was determined and the sub-inhibitory concentrations of the compounds were able to inhibit biofilm formation. Both the compounds disrupted about 60-70% mature biofilms, which was also visually observed by light microscopy. Both linalool and luteolin exhibited a significant reduction in the production of EPS and alginate in the biofilms matrix of V. harveyi which was confirmed by Scanning Electron Microscopy (SEM). Both compounds inhibited the swarming and swimming motility, the crucial quorum sensing (QS) mediated virulence of V. harveyi. The present study shows the presence of valuable polyphenolic compound like luteolin in coconut shells that are discarded as a waste. From the present study we envisage that luteolin and linalool can serve as potent anti-virulent agents to combat QS mediated infections against aquaculture pathogens.
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Affiliation(s)
- Jothipandiyan Sowndarya
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur 613 401,Tamil Nadu, India
| | - Sanaulla Farisa Banu
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur 613 401,Tamil Nadu, India
| | - Gunasekaran Madhura
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur 613 401,Tamil Nadu, India
| | - Prabakaran Yuvalakshmi
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur 613 401,Tamil Nadu, India
| | - Durairajan Rubini
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur 613 401,Tamil Nadu, India
| | - Guerino Bandeira Junior
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Bernardo Baldisserotto
- Department of Physiology and Pharmacology, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Vellingiri Vadivel
- Chemical Biology Lab, School of Chemical and Biotechnology (SCBT/CARISM), SASTRA Deemed University, Tirumalaisamudram, Thanjavur 613 401, Tamil Nadu, India.
| | - Paramasivam Nithyanand
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Thanjavur 613 401,Tamil Nadu, India.
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Luís Â, Sousa S, Wackerlig J, Dobusch D, Duarte AP, Pereira L, Domingues F. Star anise (
Illicium verum
Hook. f.) essential oil: Antioxidant properties and antibacterial activity against
Acinetobacter baumannii. FLAVOUR FRAG J 2019. [DOI: 10.1002/ffj.3498] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ângelo Luís
- Centro de Investigação em Ciências da Saúde (CICS‐UBI) Universidade da Beira Interior Av. Infante D. Henrique 6200‐506 Covilhã Portugal
| | - Sónia Sousa
- Materiais Fibrosos e Tecnologias Ambientais (FibEnTech) Universidade da Beira Interior Rua Marquês d’Ávila e Bolama 6201‐001 Covilhã Portugal
| | - Judith Wackerlig
- Department of Pharmaceutical Chemistry University of Vienna Althanstrasse 14 1090 Vienna Austria
| | - Daniel Dobusch
- Department of Pharmaceutical Chemistry University of Vienna Althanstrasse 14 1090 Vienna Austria
| | - Ana Paula Duarte
- Centro de Investigação em Ciências da Saúde (CICS‐UBI) Universidade da Beira Interior Av. Infante D. Henrique 6200‐506 Covilhã Portugal
| | - Luísa Pereira
- Centro de Matemática e Aplicações (CMA‐UBI) Universidade da Beira Interior Rua Marquês d’Ávila e Bolama 6201‐001 Covilhã Portugal
| | - Fernanda Domingues
- Centro de Investigação em Ciências da Saúde (CICS‐UBI) Universidade da Beira Interior Av. Infante D. Henrique 6200‐506 Covilhã Portugal
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Wei JN, Liu ZH, Zhao YP, Zhao LL, Xue TK, Lan QK. Phytochemical and bioactive profile of Coriandrum sativum L. Food Chem 2019; 286:260-267. [PMID: 30827604 DOI: 10.1016/j.foodchem.2019.01.171] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 01/21/2019] [Accepted: 01/29/2019] [Indexed: 01/19/2023]
Abstract
Coriandrum sativum L. is well known around the world because of its food and medicine uses. The main bioactive constituents in C. sativum are essential oil, fatty acids, tocol, sterol and carotenoids, their yields and chemical compositions being influenced by genotype, variety, planting season, ecotype, planting condition, growth stage, plant part, harvesting time, extracting process and other factors. Coriander and its different extracts possess varying degrees of antioxidative and antimicrobial activities on account of different active constituents. The general usages, chemical compositions and bioactivities of coriander are summarized in this review, along with safety considerations.
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Affiliation(s)
- Jing-Na Wei
- Tianjin Institute of Quality Standard and Testing Technology for Agro-products, Tianjin Academy of Agricultural Sciences, Huada Road, 17th Kilometric Marker of Jinjing Highway, Xiqing District, Tianjin 300381, China.
| | - Zheng-Hui Liu
- Tianjin Institute of Quality Standard and Testing Technology for Agro-products, Tianjin Academy of Agricultural Sciences, Huada Road, 17th Kilometric Marker of Jinjing Highway, Xiqing District, Tianjin 300381, China
| | - Yun-Ping Zhao
- Tianjin Institute of Quality Standard and Testing Technology for Agro-products, Tianjin Academy of Agricultural Sciences, Huada Road, 17th Kilometric Marker of Jinjing Highway, Xiqing District, Tianjin 300381, China
| | - Lin-Lin Zhao
- Tianjin Institute of Quality Standard and Testing Technology for Agro-products, Tianjin Academy of Agricultural Sciences, Huada Road, 17th Kilometric Marker of Jinjing Highway, Xiqing District, Tianjin 300381, China
| | - Tian-Kai Xue
- Tianjin Institute of Quality Standard and Testing Technology for Agro-products, Tianjin Academy of Agricultural Sciences, Huada Road, 17th Kilometric Marker of Jinjing Highway, Xiqing District, Tianjin 300381, China
| | - Qing-Kuo Lan
- Tianjin Institute of Quality Standard and Testing Technology for Agro-products, Tianjin Academy of Agricultural Sciences, Huada Road, 17th Kilometric Marker of Jinjing Highway, Xiqing District, Tianjin 300381, China
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41
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Shaaban M, Elgaml A, Habib ESE. Biotechnological applications of quorum sensing inhibition as novel therapeutic strategies for multidrug resistant pathogens. Microb Pathog 2018; 127:138-143. [PMID: 30503958 DOI: 10.1016/j.micpath.2018.11.043] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 08/25/2018] [Accepted: 11/26/2018] [Indexed: 02/06/2023]
Abstract
High incidence of antibiotic resistance among bacterial clinical isolates necessitates the discovery of new targets for inhibition of microbial pathogenicity, without stimulation of microbial resistance. This could be achieved by targeting virulence determinants, which cause host damage and disease. Many pathogenic bacteria elaborate signaling molecules for cellular communication. This signaling system is named quorum sensing system (QS), and it is contingent on the bacterial population density and mediated by signal molecules called pheromones or autoinducers (AIs). Bacteria utilize QS to regulate activities and behaviors including competence, conjugation, symbiosis, virulence, motility, sporulation, antibiotic production, and biofilm formation. Hence, targeting bacterial communicating signals and suppression of QS exhibit a fundamental approach for competing microbial communication. In this review, we illustrate the common up to date approaches to utilize QS circuits in pathogenic bacteria, including Vibrio fischeri, Pseudomonas aeruginosa, Escherichia coli and Acinetobacter baumannii, as novel therapeutic targets.
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Affiliation(s)
- Mona Shaaban
- Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Taibah University, Al Madinah Al Munawwarah, 30078, Saudi Arabia; Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura University, 35516, Egypt
| | - Abdelaziz Elgaml
- Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura University, 35516, Egypt; Department of Microbiology, Faculty of Pharmacy, Horus University, New Damietta, 34517, Egypt
| | - El-Sayed E Habib
- Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Taibah University, Al Madinah Al Munawwarah, 30078, Saudi Arabia; Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura University, 35516, Egypt.
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42
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Condò C, Anacarso I, Sabia C, Iseppi R, Anfelli I, Forti L, de Niederhäusern S, Bondi M, Messi P. Antimicrobial activity of spices essential oils and its effectiveness on mature biofilms of human pathogens. Nat Prod Res 2018; 34:567-574. [DOI: 10.1080/14786419.2018.1490904] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Carla Condò
- Department of Life Science, University of Modena and Reggio Emilia, Modena, Italy
| | - Immacolata Anacarso
- Department of Life Science, University of Modena and Reggio Emilia, Modena, Italy
| | - Carla Sabia
- Department of Life Science, University of Modena and Reggio Emilia, Modena, Italy
| | - Ramona Iseppi
- Department of Life Science, University of Modena and Reggio Emilia, Modena, Italy
| | - Igor Anfelli
- Department of Life Science, University of Modena and Reggio Emilia, Modena, Italy
| | - Luca Forti
- Department of Life Science, University of Modena and Reggio Emilia, Modena, Italy
| | | | - Moreno Bondi
- Department of Life Science, University of Modena and Reggio Emilia, Modena, Italy
| | - Patrizia Messi
- Department of Life Science, University of Modena and Reggio Emilia, Modena, Italy
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43
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Exploring the antivirulent and sea food preservation efficacy of essential oil combined with DNase on Vibrio parahaemolyticus. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.04.070] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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44
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Moghimi R, Aliahmadi A, Rafati H, Abtahi HR, Amini S, Feizabadi MM. Antibacterial and anti-biofilm activity of nanoemulsion of Thymus daenensis oil against multi-drug resistant Acinetobacter baumannii. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.07.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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45
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Irani N, Basardeh E, Samiee F, Fateh A, Shooraj F, Rahimi A, Shahcheraghi F, Vaziri F, Masoumi M, Pazhouhandeh M, Siadat SD, Kazemi-Lomedasht F, Jamnani FR. The inhibitory effect of the combination of two new peptides on biofilm formation by Acinetobacter baumannii. Microb Pathog 2018; 121:310-317. [PMID: 29859290 DOI: 10.1016/j.micpath.2018.05.051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 04/27/2018] [Accepted: 05/29/2018] [Indexed: 12/13/2022]
Abstract
The emergence of extensively drug-resistant (XDR) Acinetobacter baumannii strains and the limited number of efficacious antibiotics demonstrate an urgent need to develop novel agents to treat infections caused by this dangerous pathogen. To find antimicrobial peptides against A. baumannii growing either in planktonic or in biofilm mode, biopanning was carried out with a peptide library on five XDR A. baumannii strains grown in the medium containing human blood (blood biopanning) and biofilms formed by these strains (biofilm biopanning). Two groups of peptides were identified, among which two peptides N10 (from blood biopanning) and NB2 (from biofilm biopanning) were selected and synthesized for more assessments. The selected peptides showed significant binding to A. baumannii rather than to the human cell line Caco-2. Both peptides were effective against A. baumannii and showed antibacterial activities (minimum inhibitory concentration (MIC) 500 μg/ml). In the biofilm inhibition assay, NB2 reduced biofilm more efficiently (75%) than N10 (50%). The combination of the two peptides could function better than each peptide alone to prevent biofilm formation by A. baumannii. Supplementation of conventional therapy with a mixture of peptides targeting A. baumannii or using peptides to deliver antibiotics specifically to the site of infection may be promising to control A. baumannii-related diseases.
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Affiliation(s)
- Nazanin Irani
- Department of Microbiology, Islamic Azad University, Tehran North Branch, Tehran, Iran; Human Antibody Lab, Innovation Center, Pasteur Institute of Iran, Tehran, Iran
| | - Eilnaz Basardeh
- Human Antibody Lab, Innovation Center, Pasteur Institute of Iran, Tehran, Iran
| | - Fatemeh Samiee
- Department of Microbial Biotechnology, Islamic Azad University, Pharmaceutical Sciences Branch, Tehran, Iran
| | - Abolfazl Fateh
- Human Antibody Lab, Innovation Center, Pasteur Institute of Iran, Tehran, Iran; Department of Mycobacteriology and Pulmonary Research, Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Fahimeh Shooraj
- Human Antibody Lab, Innovation Center, Pasteur Institute of Iran, Tehran, Iran; Department of Mycobacteriology and Pulmonary Research, Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Ayoub Rahimi
- Department of Mycobacteriology and Pulmonary Research, Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Fereshteh Shahcheraghi
- Department of Bacteriology, Microbiology Research Center, Pasteur Institute of Iran, Iran
| | - Farzam Vaziri
- Human Antibody Lab, Innovation Center, Pasteur Institute of Iran, Tehran, Iran; Department of Mycobacteriology and Pulmonary Research, Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Morteza Masoumi
- Department of Mycobacteriology and Pulmonary Research, Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | | | - Seyed Davar Siadat
- Human Antibody Lab, Innovation Center, Pasteur Institute of Iran, Tehran, Iran; Department of Mycobacteriology and Pulmonary Research, Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Fatemeh Kazemi-Lomedasht
- Venom & Biotherapeutics Molecules Lab, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Fatemeh Rahimi Jamnani
- Human Antibody Lab, Innovation Center, Pasteur Institute of Iran, Tehran, Iran; Department of Mycobacteriology and Pulmonary Research, Microbiology Research Center, Pasteur Institute of Iran, Tehran, Iran.
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46
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Rossi C, Chaves‐López C, Serio A, Anniballi F, Valbonetti L, Paparella A. Effect of
Origanum vulgare
essential oil on biofilm formation and motility capacity of
Pseudomonas fluorescens
strains isolated from discoloured Mozzarella cheese. J Appl Microbiol 2018; 124:1220-1231. [DOI: 10.1111/jam.13707] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 12/20/2017] [Accepted: 01/11/2018] [Indexed: 01/24/2023]
Affiliation(s)
- C. Rossi
- Faculty of Bioscience and Technology for Food, Agriculture and Environment University of Teramo Teramo TE Italy
| | - C. Chaves‐López
- Faculty of Bioscience and Technology for Food, Agriculture and Environment University of Teramo Teramo TE Italy
| | - A. Serio
- Faculty of Bioscience and Technology for Food, Agriculture and Environment University of Teramo Teramo TE Italy
| | - F. Anniballi
- Department of Veterinary Public Health and Food Safety National Reference Centre for Botulism Istituto Superiore di Sanità Rome RM Italy
| | - L. Valbonetti
- Faculty of Bioscience and Technology for Food, Agriculture and Environment University of Teramo Teramo TE Italy
| | - A. Paparella
- Faculty of Bioscience and Technology for Food, Agriculture and Environment University of Teramo Teramo TE Italy
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47
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Luís Â, Duarte AP, Pereira L, Domingues F. Chemical Profiling and Evaluation of Antioxidant and Anti-Microbial Properties of Selected Commercial Essential Oils: A Comparative Study. MEDICINES 2017; 4:medicines4020036. [PMID: 28930251 PMCID: PMC5590072 DOI: 10.3390/medicines4020036] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 05/29/2017] [Accepted: 06/01/2017] [Indexed: 01/31/2023]
Abstract
Background: The last decades have seen an increased awareness by the scientific community of the extent of resistance to conventional antibiotics, particularly with respect to the emerging multidrug-resistant pathogenic microbes. Additionally, natural antioxidants have received significant attention among food professionals and consumers because of their assumed safety and potential therapeutic value. The aim of this work was to assess the antioxidant activities of eight selected commercial essential oils (EOs), together with the evaluation of their antibacterial and anti-quorum sensing properties. Methods: The chemical profiling of the EOs was performed using gas chromatography-mass spectrometry (GC-MS) analysis. The antioxidant properties of the EOs were evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay and by β-carotene bleaching test. Disc diffusion assays were employed to evaluate the anti-bacterial and anti-quorum sensing activities of the EOs. Results: It was observed that EOs from three Eucalyptus species are rich in eucalyptol. Generally, linalool is abundant in EOs from four Lavandula species. The oil of Cymbopogon citratus is the one with the best capacity to scavenge the DPPH free radicals and presented great antibacterial activity. Conclusions: The geographical origins of the plant species are determinant factors in the EO composition and in the corresponding biological activities.
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Affiliation(s)
- Ângelo Luís
- Centro de Investigação em Ciências da Saúde (CICS-UBI), Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal.
| | - Ana Paula Duarte
- Centro de Investigação em Ciências da Saúde (CICS-UBI), Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal.
| | - Luísa Pereira
- Centro de Matemática e Aplicações (CMA-UBI), Universidade da Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001 Covilhã, Portugal.
| | - Fernanda Domingues
- Centro de Investigação em Ciências da Saúde (CICS-UBI), Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal.
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48
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Scazzocchio F, Mondì L, Ammendolia MG, Goldoni P, Comanducci A, Marazzato M, Conte MP, Rinaldi F, Crestoni ME, Fraschetti C, Longhi C. Coriander ( Coriandrum sativum) Essential Oil: Effect on Multidrug Resistant Uropathogenic Escherichia coli. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200438] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Coriander ( Coriandrum sativum L., Apiaceae) is known for its antimicrobial activity and the aim of this study was to investigate the effect of its essential oil (CDO) against multidrug resistant uropathogenic Escherichia coli (UPEC). CDO was able to inhibit the growth of UPEC strains and propidium iodide uptake, and electron microscopy examination suggested that bacterial structural modifications occurred. The presence of CDO reduced the MIC of gentamicin. E.coli adhesion efficiency on cell monolayers and abiotic surfaces was not affected by subMIC oil concentrations; furthermore, CDO showed cytotoxic activity towards the HEp-2 tumor cell line. These findings contribute to the knowledge about essential oils as sources of potential antimicrobial agents against uropathogenic E. coli and encourage further investigations.
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Affiliation(s)
- Francesca Scazzocchio
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | - Lorenzo Mondì
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | | | - Paola Goldoni
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | - Antonella Comanducci
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | - Massimiliano Marazzato
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | - Maria Pia Conte
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
| | - Federica Rinaldi
- Center for Life Nano Science@Sapienza, Fondazione Istituto Italiano di Tecnologia, Rome, Italy
| | - Maria Elisa Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, Rome, Italy
| | - Caterina Fraschetti
- Dipartimento di Chimica e Tecnologie del Farmaco, “Sapienza” Università di Roma, Rome, Italy
| | - Catia Longhi
- Dipartimento di Sanità Pubblica e Malattie Infettive, “Sapienza” Università di Roma, Rome, Italy
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Manoharan RK, Lee JH, Kim YG, Kim SI, Lee J. Inhibitory effects of the essential oils α-longipinene and linalool on biofilm formation and hyphal growth of Candida albicans. BIOFOULING 2017; 33:143-155. [PMID: 28155334 DOI: 10.1080/08927014.2017.1280731] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 01/03/2017] [Indexed: 05/24/2023]
Abstract
Candida albicans is one of the most common fungal pathogens, and causes systemic and invasive infections in humans. C. albicans biofilms are composed of yeast and hyphal and pseudohyphal elements, and the transition of yeast to the hyphal stage could be a virulence factor. In this study, diverse essential oils were initially investigated for anti-biofilm activity against C. albicans strains, and cascarilla bark oil and helichrysum oil and their components α-longipinene (a major constituent of both) and linalool were found to markedly inhibit biofilm formation without affecting planktonic cell growth. Moreover, α-longipinene and linalool were found to synergistically reduce biofilm formation. Notably, treatments with cascarilla bark oil, helichrysum oil, α-longipinene, or linalool clearly inhibited hyphal formation, and this appeared to be largely responsible for their anti-biofilm effect. Furthermore, the two essential oils, α-longipinene and linalool, reduced C. albicans virulence in Caenorhabditis elegans.
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Affiliation(s)
| | - Jin-Hyung Lee
- a School of Chemical Engineering , Yeungnam University , Gyeongsan , Republic of Korea
| | - Yong-Guy Kim
- a School of Chemical Engineering , Yeungnam University , Gyeongsan , Republic of Korea
| | - Soon-Il Kim
- b Nareso Research Center , Suwon , Republic of Korea
| | - Jintae Lee
- a School of Chemical Engineering , Yeungnam University , Gyeongsan , Republic of Korea
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50
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Merghni A, Bekir K, Kadmi Y, Dallel I, Janel S, Bovio S, Barois N, Lafont F, Mastouri M. Adhesiveness of opportunistic Staphylococcus aureus to materials used in dental office: In vitro study. Microb Pathog 2016; 103:129-134. [PMID: 27993700 DOI: 10.1016/j.micpath.2016.12.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 12/05/2016] [Accepted: 12/06/2016] [Indexed: 12/01/2022]
Abstract
Staphylococcus aureus (S. aureus) is one of several opportunistic microbial pathogens associated with many healthcare problems. In the present study, S. aureus was assessed for its biofilm-forming ability on materials routinely used in dental offices, including stainless steel (SS), polyethylene (PE), and polyvinyl chloride (PVC). Materials that were tested were characterized for roughness (Ra) and surface free energy (SFE). The adhesion forces exerted by S. aureus to each substratum were investigated using atomic force microscopy (AFM), and biofilm formation was quantitatively assessed by crystal violet staining assay. AFM measurements demonstrated that the strongest adhesion forces (20 nN) were exerted on the PE surfaces (P < 0.05) and depended more on Ra. In addition, the results of biofilm formation capability indicated that S. aureus exhibited more affinity to SS materials when compared to the other materials (P < 0.05). This ability of biofilm formation seems to be more correlated to SFE (R = 0.65). Hence, control of the surface properties of materials used in dental practices is of crucial importance for preventing biofilm formation on dental materials to be used for patients' dental care.
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Affiliation(s)
- Abderrahmen Merghni
- Laboratory of Infectious Diseases and Biological Agents (LR99ES27), Faculty of Pharmacy, Monastir University, Monastir, Tunisia.
| | - Karima Bekir
- Laboratory of Analysis, Treatment and Valorization of Environmental Pollutants and Products (LR01ES16), Faculty of Pharmacy, Monastir University, Monastir, Tunisia
| | - Yassine Kadmi
- Université d'Artois, EA 7394, Institut Charles VIOLLETTE, Lens, F-62300, France; ISA Lille, EA 7394, Institut Charles VIOLLETTE, Lille, F-59000, France; Ulco, EA 7394, Institut Charles VIOLLETTE, Boulogne sur Mer, F-62200, France; Université de Lille, EA 7394, Institut Charles VIOLLETTE, Lille, F-59000, France
| | - Ines Dallel
- Orthodontic Department of Monastir Dental Clinic, Laboratory of Oral Health and Orofacial Rehabilitation (LR12ES11), Tunisia
| | | | | | | | - Frank Lafont
- BioImaging Center Lille-FR3642, Lille, France; Cellular Microbiology and Physics of Infection Group - Center of Infection and Immunity of Lille: CNRS UMR8204, INSERM U1019, Institut Pasteur de Lille, Lille Regional University Hospital Centre, Lille University, France
| | - Maha Mastouri
- Laboratory of Infectious Diseases and Biological Agents (LR99ES27), Faculty of Pharmacy, Monastir University, Monastir, Tunisia; Laboratory of Microbiology, University Hospital of Fattouma Bourguiba, Monastir, Tunisia
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