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Lin P, Gu H, Zhuang X, Wang F, Hu X. Controlled Release of Curcumin and Hypocrellin A from Electrospun Poly(l-Lactic Acid)/Silk Fibroin Nanofibers for Enhanced Cancer Cell Inhibition. ACS APPLIED BIO MATERIALS 2024. [PMID: 39069738 DOI: 10.1021/acsabm.4c00582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Nanofibers have emerged as a highly effective method for drug delivery, attributed to their remarkable porosity and ability to regulate drug release rates while minimizing toxicity and side effects. In this study, we successfully loaded the natural anticancer drugs curcumin (CUR) and hypocrellin A (HA) into pure poly(l-lactic acid) (PLLA) and PLLA-silk protein (PS) composite nanofibers through electrospinning technology. This result was confirmed through comprehensive analysis involving SEM, FTIR, XRD, DSC, TG, zeta potential, and pH stability analysis. The encapsulation efficiency of all samples exceeded 85%, demonstrating the effectiveness of the loading process. Additionally, the drug release doses were significantly higher in the composites compared to pure PLLA, owing to the enhanced crystallinity and stability of the silk proteins. Importantly, the composite nanofibers exhibited excellent pH stability in physiological and acidic environments. Furthermore, the drug-loaded composite nanofibers displayed strong inhibitory effects on cancer cells, with approximately 28% (HA) and 37% (CUR) inhibition of cell growth and differentiation within 72 h, while showing minimal impact on normal cells. This research highlights the potential for controlling drug release through the manipulation of fiber diameter and crystallinity, paving the way for wider applications of electrospun green nanomaterials in the field of medicine.
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Affiliation(s)
- Ping Lin
- Center of Analysis and Testing, Nanjing Normal University, Nanjing 210023, People's Republic of China
- School of Chemistry and Materials Science, Nanjing Normal University Jiangsu, Nanjing 210023, People's Republic of China
| | - Hanling Gu
- Center of Analysis and Testing, Nanjing Normal University, Nanjing 210023, People's Republic of China
- School of Chemistry and Materials Science, Nanjing Normal University Jiangsu, Nanjing 210023, People's Republic of China
| | - Xincheng Zhuang
- Center of Analysis and Testing, Nanjing Normal University, Nanjing 210023, People's Republic of China
- School of Chemistry and Materials Science, Nanjing Normal University Jiangsu, Nanjing 210023, People's Republic of China
| | - Fang Wang
- Center of Analysis and Testing, Nanjing Normal University, Nanjing 210023, People's Republic of China
- School of Chemistry and Materials Science, Nanjing Normal University Jiangsu, Nanjing 210023, People's Republic of China
| | - Xiao Hu
- Department of Physics and Astronomy, Rowan University, Glassboro, New Jersey 08028, United States
- Department of Biological and Biomedical Sciences, Rowan University, Glassboro, New Jersey 08028, United States
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2
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Permadi N, Nurzaman M, Doni F, Julaeha E. Elucidation of the composition, antioxidant, and antimicrobial properties of essential oil and extract from Citrus aurantifolia (Christm.) Swingle peel. Saudi J Biol Sci 2024; 31:103987. [PMID: 38617568 PMCID: PMC11007538 DOI: 10.1016/j.sjbs.2024.103987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 03/29/2024] [Accepted: 04/04/2024] [Indexed: 04/16/2024] Open
Abstract
The most effective methodologies for generating Musa spp. explants involve the utilization of plant tissue culture micropropagation techniques. However, the pervasive challenge of microbial contamination significantly impedes the successful micropropagation of Musa spp. This study examined the antioxidant and antibacterial characteristics of the essential oil (LPO) and extract (LPE) obtained from the peel of Citrus aurantifolia. Additionally, we explored their mechanisms against common microbial contaminants in Musa spp. micropropagation. Using gas chromatography-mass spectrometry, we identified 28 components in LPO, with δ-limonene, β-pinene, citral, trans-citral, β-bisabolene, geranyl acetate, and α-pinene as the primary constituents. Meanwhile, liquid chromatography-mass spectrometry detected 17 components in LPE, highlighting nobiletin, tangeretin, scoparone, sinensetin, tetramethylscutellarein, 5-demethylnobiletin, and pyropheophorbide A as the predominant compounds. Evaluation using the DPPH and ABTS methods revealed the IC50 values for LPE at 0.66 ± 0.009 and 0.92 ± 0.012 mg/mL, respectively, indicating higher antioxidant activity compared to LPO, with IC50 values of 3.03 ± 0.019 and 4.27 ± 0.023 mg/mL using the same methods. Both LPO and LPE exhibited antimicrobial activities against all tested contaminant microorganisms through in vitro assays. Mechanistic investigations employing time-kill analysis, assessment of cell membrane integrity, and scanning electron microscopy (SEM) revealed changes in the morphological characteristics of the tested microbial contaminants, intensifying with increased concentration and exposure duration of LPO and LPE. These alterations led to substantial damage, including cell wall lysis, leakage of intracellular components, and subsequent cell death. Consequently, LPO and LPE emerge as promising alternatives for addressing microbial contamination in banana tissue cultures.
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Affiliation(s)
- Nandang Permadi
- Doctorate Program in Biotechnology, Graduate School, Universitas Padjadjaran, Bandung 40132, Indonesia
| | - Mohamad Nurzaman
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia
| | - Febri Doni
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia
| | - Euis Julaeha
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia
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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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Shaaban MT, Mohamed BS, Zayed M, El-Sabbagh SM. Antibacterial, antibiofilm, and anticancer activity of silver-nanoparticles synthesized from the cell-filtrate of Streptomyces enissocaesilis. BMC Biotechnol 2024; 24:8. [PMID: 38321442 PMCID: PMC10848522 DOI: 10.1186/s12896-024-00833-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 01/23/2024] [Indexed: 02/08/2024] Open
Abstract
Silver nanoparticles (Ag-NPs) have a unique mode of action as antibacterial agents in addition to their anticancer and antioxidant properties. In this study, microbial nanotechnology is employed to synthesize Ag-NPs using the cell filtrate of Streptomyces enissocaesilis BS1. The synthesized Ag-NPs are confirmed by ultraviolet-visible (UV-Vis), Fourier transform infrared (FT-IR), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Also, the effects of different factors on Ag-NPs synthesis were evaluated to set the optimum synthesis conditions. Also, the antibacterial, antibiofilm, and anticancer activity of Ag-NPs was assessed. The X-ray diffraction (XRD) analysis confirmed the crystalline nature of the sample and validated that the crystal structure under consideration is a face-centered cubic (FCC) pattern. The TEM examination displayed the spherical particles of the Ag-NPs and their average size, which is 32.2 nm. Fourier transform infrared spectroscopy (FTIR) revealed significant changes in functionality after silver nanoparticle dispersion, which could be attributed to the potency of the cell filtrate of Streptomyces enissocaesilis BS1 to act as both a reducing agent and a capping agent. The bioactivity tests showed that our synthesized Ag-NPs exhibited remarkable antibacterial activity against different pathogenic strains. Also, when the preformed biofilms of Pseudomonas aeruginosa ATCC 9027, Salmonella typhi ATCC 12023, Escherichia coli ATCC 8739, and Staphylococcus aureus ATCC 6598 were exposed to Ag NPs 50 mg/ml for 24 hours, the biofilm biomass was reduced by 10.7, 34.6, 34.75, and 39.08%, respectively. Furthermore, the Ag-NPs showed in vitro cancer-specific sensitivity against human breast cancer MCF-7 cell lines and colon cancer cell line Caco-2, and the IC50 was 0.160 mg/mL and 0.156 mg/mL, respectively. The results of this study prove the ease and efficiency of the synthesis of Ag-NPs using actinomycetes and demonstrate the significant potential of these Ag-NPs as anticancer and antibacterial agents.
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Affiliation(s)
- Mohamed T Shaaban
- Botany and Microbiology Department, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt
| | - Briksam S Mohamed
- Botany and Microbiology Department, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt.
| | - Muhammad Zayed
- Botany and Microbiology Department, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt
| | - Sabha M El-Sabbagh
- Botany and Microbiology Department, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt
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Bao Z, Xie Y, Xu C, Zhang Z, Zhu D. Biotechnological production and potential applications of hypocrellins. Appl Microbiol Biotechnol 2023; 107:6421-6438. [PMID: 37695342 DOI: 10.1007/s00253-023-12727-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 08/01/2023] [Accepted: 08/10/2023] [Indexed: 09/12/2023]
Abstract
Hypocrellins (HYPs), a kind of natural perylenequinones (PQs) with an oxidized pentacyclic core, are important natural compounds initially extracted from the stromata of Hypocrella bambusae and Shiraia bambusicola. They have been widely concerned for their use as anti-microbial, anti-cancers, and anti-viral photodynamic therapy agents in recent years. Considering the restrictions of natural stromal resources, submerged fermentation with Shiraia spp. has been viewed as a promising alternative biotechnology for HYP production, and great efforts have been made to improve HYP production over the past decade. This article reviews recent publications about the mycelium fermentation production of HYPs, and their bioactivities and potential applications, and especially summarizes the progresses toward manipulation of fermentation conditions. Also, their chemical structure and analytic methods are outlined. Herein, it is worth mentioning that the gene arrangement in HYP gene cluster is revised; previous unknown genes in HYP and CTB gene clusters with correct function annotation are deciphered; the homologous sequences of HYP, CTB, and elc are systematically aligned, and especially the biosynthetic pathway of HYPs is full-scale proposed. KEY POINTS: • The mycelial fermentation process and metabolic regulation of hypocrellins are reviewed. • The bioactivities and potential applications of hypocrellins are summarized. • The biosynthesis pathway and regulatory mechanisms of hypocrellins are outlined.
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Affiliation(s)
- Zhuanying Bao
- Key Laboratory of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, China
| | - Yunchang Xie
- Key Laboratory of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, China
- Key Laboratory of Bioprocess Engineering of Jiangxi Province, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang, 330013, China
| | - Chenglong Xu
- Key Laboratory of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, China
| | - Zhibin Zhang
- Key Laboratory of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, China
| | - Du Zhu
- Key Laboratory of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, 330022, China.
- Key Laboratory of Bioprocess Engineering of Jiangxi Province, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang, 330013, China.
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Antifungal activity and mechanism of electron beam irradiation against Rhizopus oryzae. J Food Prot 2023; 86:100070. [PMID: 36989859 DOI: 10.1016/j.jfp.2023.100070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 01/18/2023] [Accepted: 03/06/2023] [Indexed: 03/12/2023]
Abstract
Electron beam irradiation is a physical fungicidal technique that has emerged as a potential application in China. However, its antifungal activity and mechanism against Rhizopus oryzae have not been reported. Thus, this study aimed to investigate the antifungal activity and mechanism of electron beam irradiation of R. oryzae. The antifungal activity analysis showed that the D10 value and complete elimination dose of R. oryzae irradiated by electron beam were 1.73 kGy and 8.08 kGy, respectively. Electron beam irradiation has a strong inhibitory effect on the filamentous biomass of R. oryzae. To reveal the antifungal mechanism of electron beam against R. oryzae, this study analyzed the dynamic changes in the cell wall, cell membrane, and oxidative stress induced by different irradiation doses. The results showed that electron beam irradiation destroyed the cell wall structure of R. oryzae, increasing chitinase activity and decreasing chitin content. Cell membrane integrity is disrupted, increasing relative conductivity, decreasing pH values, and decreasing soluble protein content. Electron beam irradiation causes oxidative stress in cells, increasing H2O2 content, decreasing antisuperoxide anion activity, decreasing DPPH free radical scavenging activity, and inhibiting defense enzyme (CAT and SOD) activity. This phenomenon indicates that electron beams can cause structural damage to and metabolic dysfunction of cells and disorders of redox homeostasis, which may be the main cause of growth inhibition and cell death in R. oryzae.
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Zeng J, Chen D, Lv C, Qin K, Zhou Q, Pu N, Song S, Wang X. Antimicrobial and anti-biofilm activity of Polygonum chinense L.aqueous extract against Staphylococcus aureus. Sci Rep 2022; 12:21988. [PMID: 36539472 PMCID: PMC9768122 DOI: 10.1038/s41598-022-26399-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
Polygonum chinense Linn. (Polygonum chinense L.) is one of the main raw materials of Chinese patent medicines such as Guangdong herbal tea. The increasing antibiotic resistance of S. aureus and the biofilm poses a serious health threat to humans, and there is an urgent need to provide new antimicrobial agents. As a traditional Chinese medicine, the antibacterial effect of Polygonum chinense L. has been reported, but the antibacterial mechanism of Polygonum chinense L.aqueous extract and its effect on biofilm have not been studied in great detail, which hinders its application as an effective antibacterial agent. In this study, the mechanism of action of Polygonum chinense L.aqueous extract on Staphylococcus aureus (S. aureus) and its biofilm was mainly evaluated by morphological observation, flow cytometry and laser confocal experiments. Our findings demonstrate that Polygonum chinense L.aqueous extract has a significant bacteriostatic effect on S. aureus. The result of growth curve exhibits that Polygonum chinense L.aqueous extract presents a significant inhibitory effect against S. aureus. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) reveals that Polygonum chinense L.aqueous extract exerts a potent destruction of the cell wall of S. aureus and a significant inhibitory effect on the formation of S. aureus biofilm. In addition, flow cytometry showed the ability of Polygonum chinense L.aqueous extract to promote apoptosis by disrupting cell membranes of S. aureus. Notably, confocal laser scanning microscopy (CLSM) images illustrated the ability of Polygonum chinense L.aqueous to inhibit the formation of S. aureus biofilms in a dose-dependent manner. These results suggested that Polygonum chinense L.aqueous is a promising alternative antibacterial and anti-biofilm agent for combating infections caused by planktonic and biofilm cells of S. aureus.
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Affiliation(s)
- Jianye Zeng
- grid.417409.f0000 0001 0240 6969School of Preclinical Medicine of Zunyi Medical University, Zunyi Medical University, Zunyi, 563000 Guizhou People’s Republic of China
| | - Dandan Chen
- grid.417409.f0000 0001 0240 6969School of Preclinical Medicine of Zunyi Medical University, Zunyi Medical University, Zunyi, 563000 Guizhou People’s Republic of China
| | - Chunli Lv
- grid.417409.f0000 0001 0240 6969School of Preclinical Medicine of Zunyi Medical University, Zunyi Medical University, Zunyi, 563000 Guizhou People’s Republic of China
| | - Kening Qin
- grid.417409.f0000 0001 0240 6969School of Preclinical Medicine of Zunyi Medical University, Zunyi Medical University, Zunyi, 563000 Guizhou People’s Republic of China
| | - Qin Zhou
- grid.417409.f0000 0001 0240 6969School of Preclinical Medicine of Zunyi Medical University, Zunyi Medical University, Zunyi, 563000 Guizhou People’s Republic of China
| | - Na Pu
- grid.417409.f0000 0001 0240 6969School of Preclinical Medicine of Zunyi Medical University, Zunyi Medical University, Zunyi, 563000 Guizhou People’s Republic of China
| | - Shanshan Song
- grid.417409.f0000 0001 0240 6969School of Preclinical Medicine of Zunyi Medical University, Zunyi Medical University, Zunyi, 563000 Guizhou People’s Republic of China
| | - Xiaomin Wang
- grid.417409.f0000 0001 0240 6969School of Preclinical Medicine of Zunyi Medical University, Zunyi Medical University, Zunyi, 563000 Guizhou People’s Republic of China ,National Clinical Research Center for Infectious Diseases, Shenzhen, 518112 Guangdong People’s Republic of China
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Chen F, Wang H, Lin Z, Hu J, Wu Y, Shi L, Wang J, Xiu Y, Lin S. Enzymatic and non-enzymatic bioactive compounds, and antioxidant and antimicrobial activities of the extract from one selected wild berry (Rubus coreanus) as novel natural agent for food preservation. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Mechanism of antimicrobials immobilized on packaging film inhabiting foodborne pathogens. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ghorbanizadeh S, Karami F, Delfani S, Shakibaie M, Razlansari A, Rezaei F. Antibacterial effects and cellular mechanisms of iron oxide magnetic nanoparticles coated by piroctone olamine against some cariogenic bacteria. Ann Med Surg (Lond) 2022; 81:104291. [PMID: 36147164 PMCID: PMC9486417 DOI: 10.1016/j.amsu.2022.104291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 07/22/2022] [Accepted: 07/26/2022] [Indexed: 11/01/2022] Open
Abstract
Background Methods Results Conclusion We revealed the promising antibacterial effects of Fe3O4@PONP against some cariogenic bacteria. It triggered the ROS production and protein leakage as the possible antibacterial mode of action of anti-infective agents. Additional surveys are necessary to elucidate the accurate mechanisms of these nanoparticles.
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Xu R, Li XP, Zhang X, Shen WH, Min CY, Wang JW. Contrasting regulation of live Bacillus cereus No.1 and its volatiles on Shiraia perylenequinone production. Microb Cell Fact 2022; 21:172. [PMID: 35999640 PMCID: PMC9396862 DOI: 10.1186/s12934-022-01897-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 08/14/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Fungal perylenequinones (PQs) are a class of photoactivated polyketide mycotoxins produced by plant-associated fungi. Hypocrellins, the effective anticancer photodynamic therapy (PDT) agents are main bioactive PQs isolated from a bambusicolous Shiraia fruiting bodies. We found previously that bacterial communities inhabiting fungal fruiting bodies are diverse, but with unknown functions. Bacillus is the most dominant genus inside Shiraia fruiting body. To understand the regulation role of the dominant Bacillus isolates on host fungus, we continued our work on co-culture of the dominant bacterium B. cereus No.1 with host fungus Shiraia sp. S9 to elucidate bacterial regulation on fungal hypocrellin production. RESULTS Results from "donut" plate tests indicated that the bacterial culture could promote significantly fungal PQ production including hypocrellin A (HA), HC and elsinochrome A-C through bacterial volatiles. After analysis by gas chromatograph/mass spectrometer and confirmation with commercial pure compounds, the volatiles produced by the bacterium were characterized. The eliciting roles of bacterial volatile organic compounds (VOCs) on HA production via transcriptional regulation of host Shiraia fungus were confirmed. In the established submerged bacterial volatile co-culture, bacterial volatiles could not only promote HA production in the mycelium culture, but also facilitate the release of HA into the medium. The total production of HA was reached to 225.9 mg/L, about 1.87 times that of the fungal mono-culture. In contrast, the live bacterium suppressed markedly fungal PQ production in both confrontation plates and mycelium cultures by direct contact. The live bacterium not only down-regulated the transcript levels of HA biosynthetic genes, but also degraded extracellular HA quickly to its reductive product. CONCLUSION Our results indicated that bacterial volatile release could be a long-distance signal to elicit fungal PQ production. Biodegradation and inhibition by direct contact on fungal PQs were induced by the dominate Bacillus to protect themselves in the fruiting bodies. This is the first report on the regulation of Bacillus volatiles on fungal PQ production. These findings could be helpful for both understanding the intimate fungal-bacterial interactions in a fruiting body and establishing novel cultures for the enhanced production of bioactive PQs.
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Affiliation(s)
- Rui Xu
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Xin Ping Li
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Xiang Zhang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Wen Hao Shen
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China
| | - Chun Yan Min
- Suzhou Institute for Food and Drug Control, Suzhou, 215104, China
| | - Jian Wen Wang
- College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, China.
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Chen T, Yang D, Lei S, Liu J, Song Y, Zhao H, Zeng X, Dan H, Chen Q. Photodynamic therapy-a promising treatment of oral mucosal infections. Photodiagnosis Photodyn Ther 2022; 39:103010. [PMID: 35820633 DOI: 10.1016/j.pdpdt.2022.103010] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/07/2022] [Accepted: 07/08/2022] [Indexed: 02/05/2023]
Abstract
The treatment of oral mucosal infections is increasingly challenging owing to antibiotic resistance. Therefore, alternative antimicrobial strategies are urgently required. Photodynamic therapy (PDT) has attracted attention for the treatment of oral mucosal infections because of its ability to effectively inactivate drug-resistant bacteria, completely heal clinical infectious lesions and usually offers only mild adverse reactions. This review briefly summarizes relevant scientific data and published papers and discusses the potential mechanism and application of PDT in the treatment of oral mucosal infections.
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Affiliation(s)
- Ting Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Dan Yang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Shangxue Lei
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Jiaxin Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Yansong Song
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Hang Zhao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Xin Zeng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Hongxia Dan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China.
| | - Qianming Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Research Unit of Oral Carcinogenesis and Management, Chinese Academy of Medical Sciences, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, PR China
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Vera C, Gallucci MN, Marioni J, Sosa Morales MC, Martino DM, Nuñez Montoya S, Borsarelli CD. "On-Demand" Antimicrobial Photodynamic Activity through Supramolecular Photosensitizers Built with Rose Bengal and ( p-Vinylbenzyl)triethylammomium Polycation Derivatives. Bioconjug Chem 2022; 33:463-472. [PMID: 35138087 DOI: 10.1021/acs.bioconjchem.1c00596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The antimicrobial photodynamic activity (aPDA) in fungal and bacterial strains of supramolecular adducts formed between the anionic photosensitizer (PS) Rose Bengal (RB2-) and aromatic polycations derived from (p-vinylbenzyl)triethylammonium chloride was evaluated. Stable supramolecular adducts with dissociation constants Kd ≈ 5 μM showed photosensitizing properties suitable for generating singlet oxygen (ΦΔ = 0.5 ± 0.1) with the added advantage of improving the photostability of the xanthenic dye. However, the aPDA of both free and supramolecular RB2- was highly dependent on the type of microorganism treated, indicating the importance of specific interactions between the different cell wall structures of the microbe and the PSs. Indeed, in the case of Gram-positive Staphylococcus aureus, the aPDA of molecular and supramolecular PSs was highly effective. Instead, in the case of Gram-negative Escherichia coli, only the RB2-:polycation adducts showed aPDA, while RB2- alone was inefficient, but in the case of Candida tropicalis, the opposite behavior was observed. Therefore, the present results indicate the potential of supramolecular chemistry to obtain aPDA à la carte depending on the target microbe and the PS properties.
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Affiliation(s)
- Cecilia Vera
- Instituto de Bionanotecnolgía del NOA (INBIONATEC), CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, km 1125, Santiago del Estero G4206XCP, Argentina
| | - Mauro N Gallucci
- Instituto de Bionanotecnolgía del NOA (INBIONATEC), CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, km 1125, Santiago del Estero G4206XCP, Argentina
| | - Juliana Marioni
- CONICET, Instituto Multidisciplinario de Biología Vegetal (IMBIV), Cordoba X5000HUA, Argentina
| | - Marcelo C Sosa Morales
- Instituto de Bionanotecnolgía del NOA (INBIONATEC), CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, km 1125, Santiago del Estero G4206XCP, Argentina
| | - Debora M Martino
- Instituto de Física del Litoral (IFIS Litoral), CONICET, Universidad Nacional del Litoral (UNL), Santa Fe S3000GLN, Argentina
| | - Susana Nuñez Montoya
- CONICET, Instituto Multidisciplinario de Biología Vegetal (IMBIV), Cordoba X5000HUA, Argentina.,Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, Dpto. Cs. Farmacéuticas, Haya de la Torre y Medina Allende, Córdoba X5000HUA, Argentina
| | - Claudio D Borsarelli
- Instituto de Bionanotecnolgía del NOA (INBIONATEC), CONICET, Universidad Nacional de Santiago del Estero (UNSE), RN9, km 1125, Santiago del Estero G4206XCP, Argentina.,Facultad de Agronomía y Agroindustrias. UNSE, Av. Belgrano (S) 1912, Santiago del Estero G4200, Argentina
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14
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Alnomasy S. Antibacterial and anti-parasitic activities of Terfezia claveryi methanolic extract against some common pathogenic agents of infectious diarrhea. Asian Pac J Trop Biomed 2022. [DOI: 10.4103/2221-1691.343389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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15
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Seidavi A, Tavakoli M, Asroosh F, Scanes CG, Abd El-Hack ME, Naiel MAE, Taha AE, Aleya L, El-Tarabily KA, Swelum AA. Antioxidant and antimicrobial activities of phytonutrients as antibiotic substitutes in poultry feed. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:5006-5031. [PMID: 34811612 DOI: 10.1007/s11356-021-17401-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 11/03/2021] [Indexed: 06/13/2023]
Abstract
Globally, there is increasing demand for safe poultry food products free from antibiotic residues. There is thus a need to develop alternatives to antibiotics with safe nutritional feed derivatives that maximize performance, promote the intestinal immune status, enrich beneficial microbiota, promote health, and reduce the adverse effects of pathogenic infectious microorganisms. With the move away from including antibiotics in poultry diets, botanicals are among the most important alternatives to antibiotics. Some botanicals such as fennel, garlic, oregano, mint, and rosemary have been reported to increase the poultry's growth rate and/or feed to gain ratio. Botanicals' role is assumed to be mediated by improved immune responses and/or shifts in the microbial population in the intestine, with the elimination of pathogenic species. In addition, modulation of the gut microbiota resulted in various physiological and immunological responses and promoted beneficial bacterial strains that led to a healthy gut. There is thus a need to understand the relationship between poultry diets supplemented with botanicals and good health of the entire gastrointestinal tract if we intend to use these natural products to promote general health status and production. This current review provides an overview of current knowledge about certain botanicals that improve poultry productivity by modulating intestinal health and reducing the negative impacts of numerous pathogenic bacteria. This review also describes the efficacy, negative effects, and modes of action of some common herbal plants applied in poultry as alternatives to reduce the use of antibiotics.
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Affiliation(s)
- Alireza Seidavi
- Department of Animal Science, Rasht Branch, Islamic Azad University, Rasht, Iran.
| | - Masoomeh Tavakoli
- Department of Animal Science, Rasht Branch, Islamic Azad University, Rasht, Iran
| | - Fariborz Asroosh
- Department of Animal Science, Rasht Branch, Islamic Azad University, Rasht, Iran
| | - Colin G Scanes
- Center of Excellence in Poultry Science, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Mohamed E Abd El-Hack
- Poultry Department, Faculty of Agriculture, Zagazig University, Zagazig, 44511, Egypt
| | - Mohammed A E Naiel
- Department of Animal Production, Faculty of Agriculture, Zagazig University, Zagazig, 44511, Egypt.
| | - Ayman E Taha
- Department of Animal Husbandry and Animal Wealth Development, Faculty of Veterinary Medicine, Alexandria University, Edfina, 22758, Egypt
| | - Lotfi Aleya
- Chrono-Environnement Laboratory, UMR CNRS 6249, Bourgogne Franche-Comté University, Besançon Cedex, France
| | - Khaled A El-Tarabily
- Department of Biology, College of Science, United Arab Emirates University, 15551, Al-Ain, United Arab Emirates.
- Harry Butler Institute, Murdoch University, Murdoch, Western Australia, 6150, Australia.
| | - Ayman A Swelum
- Department of Theriogenology, Faculty of Veterinary Medicine, Zagazig University, Sharkia, Egypt
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Chen F, Miao X, Lin Z, Xiu Y, Shi L, Zhang Q, Liang D, Lin S, He B. Disruption of metabolic function and redox homeostasis as antibacterial mechanism of Lindera glauca fruit essential oil against Shigella flexneri. Food Control 2021. [DOI: 10.1016/j.foodcont.2021.108282] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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17
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He C, Chen X, Zhuang S, Wu Y, Tang B, Wu A. Palladium‐Catalyzed Heck/Insertion/Decarboxylation Domino Sequence: Synthesis of Dihydrocyclohepta[
de
]naphthalenes. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100401] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Cai He
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
| | - Xiang‐Long Chen
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
| | - Shi‐Yi Zhuang
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
| | - Yan‐Dong Wu
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
| | - Bo‐Cheng Tang
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
| | - An‐Xin Wu
- Key Laboratory of Pesticide & Chemical Biology Ministry of Education College of Chemistry Central China Normal University 430079 Wuhan People's Republic of China
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18
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Antibacterial, Antifungal, and Antidiabetic Effects of Leaf Extracts from Persea americana Mill. (Lauraceae). Biochem Res Int 2020. [DOI: 10.1155/2020/8884300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Fruits and leaves of Persia americana are used in traditional medical practices. This study was carried out to determine the antibacterial, antifungal, and antidiabetic effects of the leaf extracts from P. americana. The antibacterial activities of the leaf extracts were evaluated against Klebsiella pneumoniae and Staphylococcus epidermidis while antifungal activities were determined against Candida albicans and Candida tropicalis. The antidiabetic potential of the extracts was determined against mammalian α-glucosidase in vitro. The broth microdilution method was used to investigate the antibacterial and antifungal susceptibility of the microbial strains towards the leaf extracts. S. epidermidis was the most susceptible microbe out of the tested microorganisms. The acetone extract was the most potent extract against S. epidermidis with a minimum inhibitory concentration (MIC) of 50 μg/mL. At 100 μg/mL, the ethanol:water extract 18% of K. pneumoniae cells remained viable. Cell viability after exposure to the dichloromethane (DCM) and methanol extracts was 28% against C. albicans and 8% against C. tropicalis, respectively. The DCM:methanol and acetone extracts caused membrane damage in S. epidermidis exhibited by protein leakage. Only the acetone extract effected nucleic acid leakage. Screening of extracts’ potential to inhibit the activity of α-glucosidase was carried out spectrophotometrically following the production of p-nitrophenol from p-nitrophenol-glucopyranoside (substrate) at a wavelength of 405 nm. Out of all the tested extracts, the methanolic extract showed the best inhibitory activity on α-glucosidase enzyme in a time-dependent and dose-dependent manner.andvalues were found to be 1.4 mg/mL and 2.4 U/min, respectively, after incubation for 1 hour. It was concluded that the leaf extracts of P. americana contain phytochemicals with antibacterial, antifungal, and α-glucosidase inhibitory effects. Further studies are required for the identification of the active compounds in the leaf extracts responsible for these observed effects.
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Al Subeh ZY, Raja HA, Monro S, Flores-Bocanegra L, El-Elimat T, Pearce CJ, McFarland SA, Oberlies NH. Enhanced Production and Anticancer Properties of Photoactivated Perylenequinones. JOURNAL OF NATURAL PRODUCTS 2020; 83:2490-2500. [PMID: 32786877 PMCID: PMC7493285 DOI: 10.1021/acs.jnatprod.0c00492] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Hypocrellins and hypomycins are naturally occurring fungal perylenequinones with potential photodynamic activity against cancer and microbial diseases. This project pursued three lines of research. First, the production of perylenequinones was enhanced by investigating the effect of culture medium and light exposure on their biosynthesis. Solid-fermentation cultures on rice medium allowed for enhanced production of hypocrellins as compared to Cheerios or oatmeal medium. Alternatively, increased production of hypomycins, which are structurally related to the hypocrellins, was observed on oatmeal medium. In both cases, light exposure was an essential factor for the enhanced biosynthesis. In addition, this led to the discovery of two new perylenequinones, ent-shiraiachrome A (5) and hypomycin E (8), which were elucidated based on spectroscopic data. Finally, the photocytotoxic effects of both classes of compounds were evaluated against human skin melanoma, with EC50 values at nanomolar levels for hypocrellins and micromolar levels for hypomycins. In contrast, both classes of compounds showed reduced dark toxicity (EC50 values >100 μM), demonstrating promising phototherapeutic indices.
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Affiliation(s)
- Zeinab Y. Al Subeh
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Huzefa A. Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Susan Monro
- Department of Chemistry, Acadia University, 6 University Avenue, Wolfville, NS B4P 2R6, Canada
| | - Laura Flores-Bocanegra
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
| | - Tamam El-Elimat
- Department of Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Cedric J. Pearce
- Mycosynthetix, Inc., Hillsborough, North Carolina 27278, United States
| | - Sherri A. McFarland
- Department of Chemistry, Acadia University, 6 University Avenue, Wolfville, NS B4P 2R6, Canada
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, Texas 76019, United States
| | - Nicholas H. Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
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20
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Du W, Sun C, Wang B, Wang Y, Dong B, Liu J, Xia J, Xie W, Wang J, Sun J, Liu X, Wang H. Response mechanism of hypocrellin colorants biosynthesis by Shiraia bambusicola to elicitor PB90. AMB Express 2019; 9:146. [PMID: 31522304 PMCID: PMC6745040 DOI: 10.1186/s13568-019-0867-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 08/28/2019] [Indexed: 01/02/2023] Open
Abstract
The valuable medicine Shiraia bambusicola P. Henn. and its major active substance hypocrellin exert unique curative effects on skin diseases, diabetes, and cancers. The wild S. bambusicola is endangered due to its harsh breeding conditions and long growth cycle. It is one of the effective ways to utilize the resources sustainably to produce hypocrellin by fermentation of S. bambusicola. PB90 is a protein elicitor isolated from Phytophthora boehmeriae to induce the useful metabolites production in fungi. In this work, PB90 was selected to promote the synthesis hypocrellin by S. bambusicola. To evaluate the effect of PB90 on S. bambusicola, it was found that the induced cells showed decreased biomass, increased cell wall permeability, rapid induction of secondary metabolites, and significant increase of some enzyme activities, which confirmed a strong activation of phenylalanine/flavonoid pathways. Studies on signal molecules and gene expression level in S. bambusicola treated with PB90 have found that hydrogen peroxide (H2O2) and nitric oxide (NO) are necessary signal molecules involved in the synthesis of hypocrellin in elicited cells, and increased their signal levels through mutual reaction. We have showed for the first time, the response mechanism of hypocrellin biosynthesis from S. bambusicola to PB90, which may be not only establish a theoretical foundation for the application of PB90 to the mass production of S. bambusicola, but can also motivate further research on the application of PB90 to the conservation and sustainable utilization of other medical fungi.
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21
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Yang Y, Wang C, Zhuge Y, Zhang J, Xu K, Zhang Q, Zhang H, Chen H, Chu M, Jia C. Photodynamic Antifungal Activity of Hypocrellin A Against Candida albicans. Front Microbiol 2019; 10:1810. [PMID: 31447816 PMCID: PMC6691099 DOI: 10.3389/fmicb.2019.01810] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 07/23/2019] [Indexed: 12/22/2022] Open
Abstract
Many studies have reported that hypocrellin A (HA) exhibits effective antimicrobial activities with proper irradiation. However, its antifungal activity and the involved mechanism have not been fully defined. In this study, HA-mediated cytotoxicity in Candida albicans cells was evaluated after antimicrobial photodynamic therapy (aPDT). The results showed that 1.0 μg/ml HA significantly decreased the survival rate of C. albicans cells with light illumination. Moreover, the ROS levels were also remarkably elevated by HA. Further study found that HA combined with illumination led to cell membrane potential depolarization and cell membrane integrity damage. To investigate the form of cell death, a series of apoptosis-related parameters, including mitochondrial transmembrane potential, metacaspase activity, DNA fragmentation, nuclear condensation, and cytosolic and mitochondrial calcium, were analyzed. Data showed that all the above mentioned apoptosis hallmarks were affected after treatment with HA, indicating that HA induced C. albicans cell apoptosis. Finally, HA-mediated aPDT was demonstrated to be low-toxic and effective in treating cutaneous C. albicans infections. This study highlights the antifungal effect and mechanism of HA-mediated aPDT against C. albicans and provides a promising photodynamic antifungal candidate for C. albicans skin infections.
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Affiliation(s)
- Yijia Yang
- Pediatric Research Institute, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,Children's Heart Center, Institute of Cardiovascular Development and Translational Medicine, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,The Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China
| | - Chenglu Wang
- Pediatric Research Institute, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,Children's Heart Center, Institute of Cardiovascular Development and Translational Medicine, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,The Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China
| | - Yingzhi Zhuge
- Children's Heart Center, Institute of Cardiovascular Development and Translational Medicine, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China
| | - Jian Zhang
- Children's Heart Center, Institute of Cardiovascular Development and Translational Medicine, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China
| | - Ke Xu
- The Institute of Life Sciences, Wenzhou University, Wenzhou, China
| | - Qilu Zhang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Haijuan Zhang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Haiyan Chen
- The Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China
| | - Maoping Chu
- Pediatric Research Institute, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,Children's Heart Center, Institute of Cardiovascular Development and Translational Medicine, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,The Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China
| | - Chang Jia
- Pediatric Research Institute, The Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou, China.,The Second Clinical Medical College, Wenzhou Medical University, Wenzhou, China
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22
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Antibacterial Activity and Mechanisms of Essential Oil from Citrus medica L. var. sarcodactylis. Molecules 2019; 24:molecules24081577. [PMID: 31013583 PMCID: PMC6515347 DOI: 10.3390/molecules24081577] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/10/2019] [Accepted: 04/18/2019] [Indexed: 11/16/2022] Open
Abstract
In this work, antibacterial activity of finger citron essential oil (FCEO, Citrus medica L. var. sarcodactylis) and its mechanism against food-borne bacteria were evaluated. A total of 28 components in the oil were identified by gas chromatography-mass spectrometry, in which limonene (45.36%), γ-terpinene (21.23%), and dodecanoic acid (7.52%) were three main components. For in vitro antibacterial tests, FCEO exhibited moderately antibacterial activity against common food-borne bacteria: Escherichia coli, Staphylococcus aureus, Bacillus subtilis and Micrococcus luteus. It showed a better bactericidal effect on Gram-positive bacteria than Gram-negative. Mechanisms of the antibacterial action were investigated by observing changes of bacteria morphology according to scanning electron microscopy, time-kill analysis, and permeability of cell and membrane integrity. Morphology of tested bacteria was changed and damaged more seriously with increased concentration and exposure time of FCEO. FCEO showed a significant reduction effect on the growth rate of surviving bacteria and lead to lysis of the cell wall, intracellular ingredient leakage, and consequently, cell death.
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23
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Components and antibacterial activity of a novel essential oil from the nutrient broth of Eremothecium ashbyii H4565. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2018.11.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Guo X, Shi L, Yang S, Yang R, Dai X, Zhang T, Liu R, Chang M, Jin Q, Wang X. Effect of sea-buckthorn pulp and flaxseed residues on quality and shelf life of bread. Food Funct 2019; 10:4220-4230. [DOI: 10.1039/c8fo02511h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Sea-buckthorn and flaxseed residues are high-value materials with potential application in bread-baking.
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25
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The antimicrobial activities and action-mechanism of tea tree oil against food-borne bacteria in fresh cucumber juice. Microb Pathog 2018; 125:262-271. [DOI: 10.1016/j.micpath.2018.09.036] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 09/19/2018] [Accepted: 09/24/2018] [Indexed: 11/18/2022]
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Zhang JN, Zhang F, Tang QJ, Xu CS, Meng XH. Effect of photodynamic inactivation of Escherichia coli by hypericin. World J Microbiol Biotechnol 2018; 34:100. [PMID: 29926201 DOI: 10.1007/s11274-018-2464-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 05/25/2018] [Indexed: 01/27/2023]
Abstract
The present study has focused on the effects of hypericin (Hyp) based photodynamic inactivation (PDI) of Escherichia coli (E. coli). To evaluate the efficiency of Hyp based PDI of E. coli, single factor experiments and response surface optimization experiment were conducted to obtain the optimum parameter values (36 µM Hyp, 5.9 J cm-2 light dose: 16.4 mW cm-2, 60 W, 260 s, 590 nm and 68 min incubation time) and finally achieved a 4.1 log CFU mL-1 decrease of E. coli. Cell-Hyp interaction and intracellular reactive oxygen species (ROS) level were detected by fluorescence spectrometric photometer. Data indicated that Hyp possessed a strong ability to bind with cells. In addition, a significant increase was observed in intracellular ROS level after Hyp-based photosensitization treatment. Therefore, Hyp-based photosensitization seems to be a promising method to efficiently inactivate E. coli. It is expected to be a safe, efficient, low cost and practical method which can be applied in the field of food safety.
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Affiliation(s)
- Jun-Nan Zhang
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Fang Zhang
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Qing-Juan Tang
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Chuan-Shan Xu
- School of Chinese Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Xiang-Hong Meng
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China.
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27
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Effect of Fractioning on Antibacterial Activity of Enantia chlorantha Oliver (Annonaceae) Methanol Extract and Mode of Action. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:4831593. [PMID: 29853954 PMCID: PMC5949159 DOI: 10.1155/2018/4831593] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 03/19/2018] [Accepted: 04/01/2018] [Indexed: 11/17/2022]
Abstract
Infectious diseases caused by bacteria constitute the main cause of morbidity and mortality throughout the world and mainly in developing countries. In this work, the influence of fractioning and the mode of action of stem barks methanol extract of Enantia chlorantha were investigated. The aim was to optimize the antibacterial activity of the methanol extract. The extract was prepared by maceration of barks powder in methanol. Fractioning was done using increasing solvents polarity. Standard phytochemical methods were used for phytochemical screening. Minimum Inhibitory Concentrations (MIC) and Minimum Bactericidal Concentration (MBC) of the methanol extract and fractions were determined using broth microdilution method. The studied mode of action of both methanol extract and n-butanol fraction included antibiofilm activity, H+-ATPase-mediated proton pumping assay, salt tolerance, and cells cycle. The methanol extract of E. chlorantha stem barks was found to be active on all the bacteria tested (32 ≤ MIC ≤ 512 μg/mL), its activity being significant (MIC < 100 μg/ml) out of 5 of the 28 clinical isolates used. Salmonella enterica serovar paratyphi A was the most sensitive (32 μg/mL). Compared to the extract and other fractions, the n-butanol fraction was found to be more active (32 ≤ MIC ≤ 256). Significant antibacterial activity of this fraction was observed out of 10 of the 28 bacterial isolates and 3 out of 7 bacterial strains. Lowest MIC values (32 μg/ml) of this fraction were obtained with Escherichia coli (136), Pseudomonas aeruginosa (CIP 76110), and Salmonella enterica serovar typhi 9. The methanol extract of E. chlorantha and its n-butanol fraction revealed several modes of action including the prolongation of the latency phase of the bacterial growth, the inhibition of the pump with protons H+ - ATPases bacterial, the loss of the salt tolerance of the Staphylococcus aureus, and inhibition of the formation of the bacterial biofilm. The present results showed that the n-butanol fraction of the methanol stem barks extract of E. chlorantha possess the essential antibacterial components and could best be used to fight against bacterial infections as compared to methanol extract.
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Aruldass CA, Masalamany SRL, Venil CK, Ahmad WA. Antibacterial mode of action of violacein from Chromobacterium violaceum UTM5 against Staphylococcus aureus and methicillin-resistant Staphylococcus aureus (MRSA). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:5164-5180. [PMID: 28361404 DOI: 10.1007/s11356-017-8855-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Accepted: 03/17/2017] [Indexed: 06/07/2023]
Abstract
Violacein, violet pigment produced by Chromobacterium violaceum, has attracted much attention recently due to its pharmacological properties including antibacterial activity. The present study investigated possible antibacterial mode of action of violacein from C. violaceum UTM5 against Staphylococcus aureus and methicillin-resistant S. aureus (MRSA) strains. Violet fraction was obtained by cultivating C. violaceum UTM5 in liquid pineapple waste medium, extracted, and fractionated using ethyl acetate and vacuum liquid chromatography technique. Violacein was quantified as major compound in violet fraction using HPLC analysis. Violet fraction displayed bacteriostatic activity against S. aureus ATCC 29213 and methicillin-resistant S. aureus ATCC 43300 with minimum inhibitory concentration (MIC) of 3.9 μg/mL. Fluorescence dyes for membrane damage and scanning electron microscopic analysis confirmed the inhibitory effect by disruption on membrane integrity, morphological alternations, and rupture of the cell membranes of both strains. Transmission electron microscopic analysis showed membrane damage, mesosome formation, and leakage of intracellular constituents of both bacterial strains. Mode of action of violet fraction on the cell membrane integrity of both strains was shown by release of protein, K+, and extracellular adenosine 5'-triphosphate (ATP) with 110.5 μg/mL, 2.34 μg/mL, and 87.24 ng/μL, respectively, at 48 h of incubation. Violet fraction was toxic to human embryonic kidney (HEK293) and human fetal lung fibroblast (IMR90) cell lines with LC50 value of 0.998 ± 0.058 and 0.387 ± 0.002 μg/mL, respectively. Thus, violet fraction showed a strong antibacterial property by disrupting the membrane integrity of S. aureus and MRSA strains. This is the first report on the possible mode of antibacterial action of violet fraction from C. violaceum UTM5 on S. aureus and MRSA strains.
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Affiliation(s)
- Claira Arul Aruldass
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, UTM, 81310, Johor Bahru, Johor, Malaysia
| | | | | | - Wan Azlina Ahmad
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, UTM, 81310, Johor Bahru, Johor, Malaysia.
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Water-soluble gold(III) complexes with N-donor ligands as potential immunomodulatory and antibiofilm agents. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.11.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Du W, Sun C, Wang J, Xie W, Wang B, Liu X, Zhang Y, Fan Y. Conditions and Regulation of Mixed Culture to Promote Shiraia bambusicola and Phoma sp. BZJ6 for Laccase Production. Sci Rep 2017; 7:17801. [PMID: 29259312 PMCID: PMC5736710 DOI: 10.1038/s41598-017-17895-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 12/02/2017] [Indexed: 12/17/2022] Open
Abstract
Mixing cultures induces the biosynthesis of laccase in mixed cells, produces signal molecules, and regulates the production of mixed-cell metabolites. The fungal strain, which promotes laccase production, has been isolated and screened from the host bamboos of endophytic fungi and identified as Phoma sp. BZJ6. When the culture medium is mainly composed of soluble starch, yeast extract, and Phoma sp., the laccase output can reach 4,680 U/L. Nitric oxide (NO) and reactive oxygen species (ROS) were found to promote the regulation of laccase synthesis. Plasma membrane NAD(P)H oxidase inhibitors and NO-specific quenchers can inhibit not only the accumulation of ROS induced and NO synthesis but also the biosynthesis of laccase. The results indicate that the accumulation of superoxide anion radical (O2-) and hydrogen peroxide (H2O2) induced by the mixed culture was partially dependent on NO. The mixed culture can also reduce the biomass, increase the synthesis of total phenolics and flavonoids, and enhance the activity of phenylalanine ammonia-lyase and chalcone isomerase. This phenomenon is probably the result of the activated phenylpropanoids-flavonoid pathway. Results confirmed that the mixture culture is advantageous for laccase production and revealed that NO, O2-, and H2O2 are necessary signal molecules to induce laccase synthesis.
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Affiliation(s)
- Wen Du
- School of bioengineering, Binzhou University, Binzhou, China.
- Shandong provincial key laboratory of eco-environmental science for Yellow River Delta, Binzhou University, Binzhou, China.
| | - Chunlong Sun
- School of bioengineering, Binzhou University, Binzhou, China.
- Shandong provincial key laboratory of eco-environmental science for Yellow River Delta, Binzhou University, Binzhou, China.
| | - Jun Wang
- School of bioengineering, Binzhou University, Binzhou, China
- Shandong provincial key laboratory of eco-environmental science for Yellow River Delta, Binzhou University, Binzhou, China
| | - Wenjun Xie
- School of bioengineering, Binzhou University, Binzhou, China
- Shandong provincial key laboratory of eco-environmental science for Yellow River Delta, Binzhou University, Binzhou, China
| | - Baoqin Wang
- School of bioengineering, Binzhou University, Binzhou, China
- Shandong provincial key laboratory of eco-environmental science for Yellow River Delta, Binzhou University, Binzhou, China
| | - Xuehong Liu
- School of bioengineering, Binzhou University, Binzhou, China
| | - Yumiao Zhang
- School of bioengineering, Binzhou University, Binzhou, China
- Shandong provincial key laboratory of eco-environmental science for Yellow River Delta, Binzhou University, Binzhou, China
| | - Yanhui Fan
- School of bioengineering, Binzhou University, Binzhou, China
- Shandong provincial key laboratory of eco-environmental science for Yellow River Delta, Binzhou University, Binzhou, China
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Zhao GP, Li YQ, Sun GJ, Mo HZ. Antibacterial Actions of Glycinin Basic Peptide against Escherichia coli. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:5173-5180. [PMID: 28590128 DOI: 10.1021/acs.jafc.7b02295] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Glycinin basic peptide (GBP) is an antibacterial ingredient that occurs naturally in the basic parts of soybean glycinin. The antibacterial actions of GBP against Escherichia coli ATCC 8739 were investigated in this study. The minimum inhibitory concentration of GBP against E. coli was 200 μg/mL. The exposure of E. coli cells to GBP induced significant cell damage and inactivated intracellular esterases (stressed and dead cells, 70.9% ± 0.04 for 200 μg/mL of GBP and 91.9% ± 0.06 for 400 μg/mL of GBP), as determined through dual staining in flow cytometry. GBP resulted in the exposure of phosphatidylserine in E. coli cells. The analyses of flow cytometry-manifested GBP treatment led to the shrinkage of the cell surface and the complication of cell granularity. The observations in transmission electron microscopy demonstrated that 400 μg/mL of GBP severely disrupted the membrane integrity, resulting in ruptures or pores in the membrane, outflows of intracellular contents, or aggregation of the cytoplasm. Release of alkaline phosphatase, lipopolysaccharide, and reducing sugar further verified that the membrane damage was due to GBP. In addition, GBP treatment changed the helicity and base staking of DNA, as determined by circular dichroism spectroscopy. These results showed that GBP had strong antibacterial activity against E. coli via membrane damage and DNA perturbation. Additionally, GBP exhibited no cytotoxicity on the viability of human embryonic kidney cells. Thus, GBP may be a promising candidate as a natural antibacterial agent.
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Affiliation(s)
- Guo-Ping Zhao
- School of Food Science & Engineering, Qilu University of Technology , No. 3501 University Road of Changqing District, 250353, Jinan, Shandong Province China
| | - Ying-Qiu Li
- School of Food Science & Engineering, Qilu University of Technology , No. 3501 University Road of Changqing District, 250353, Jinan, Shandong Province China
| | - Gui-Jin Sun
- School of Food Science & Engineering, Qilu University of Technology , No. 3501 University Road of Changqing District, 250353, Jinan, Shandong Province China
| | - Hai-Zhen Mo
- School of Food Science, Henan Institute of Science and Technology , Xinxiang, 453003, China
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Antibacterial Activities and Possible Modes of Action of Acacia nilotica (L.) Del. against Multidrug-Resistant Escherichia coli and Salmonella. Molecules 2017; 22:molecules22010047. [PMID: 28098806 PMCID: PMC6155900 DOI: 10.3390/molecules22010047] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 12/18/2016] [Accepted: 12/21/2016] [Indexed: 11/22/2022] Open
Abstract
Medicinal plants are frequently used for the treatment of various infectious diseases. The objective of this study was to evaluate the antibacterial activity and mode of action of Acacia nilotica and the antibiogram patterns of foodborne and clinical strains of Escherichia coli and Salmonella. The mechanism of action of acacia extracts against E. coli and Salmonella was elucidated by observing morphological damages including cell integrity and cell membrane permeability, as well as changes in cell structures and growth patterns in kill-time experiments. The clinical isolates of E. coli and Salmonella were found resistant to more of the tested antibiotics, compared to food isolates. Minimum inhibitory concentration and minimum bactericidal concentration of acacia leaf extracts were in the ranges of 1.56–3.12 mg/mL and 3.12–6.25 mg/mL, respectively, whereas pods and bark extracts showed somewhat higher values of 3.12–6.25 mg/mL and 6.25–12.5 mg/mL, respectively, against all tested pathogens. The release of electrolytes and essential cellular constituents (proteins and nucleic acids) indicated that acacia extracts damaged the cellular membrane of the pathogens. These changes corresponded to simultaneous reduction in the growth of viable bacteria. This study indicates that A. nilotica can be a potential source of new antimicrobials, effective against antibiotic-resistant strains of pathogens.
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Zhang J, Ye KP, Zhang X, Pan DD, Sun YY, Cao JX. Antibacterial Activity and Mechanism of Action of Black Pepper Essential Oil on Meat-Borne Escherichia coli. Front Microbiol 2017; 7:2094. [PMID: 28101081 PMCID: PMC5209337 DOI: 10.3389/fmicb.2016.02094] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 12/12/2016] [Indexed: 02/03/2023] Open
Abstract
The aim of this study was to investigate the antibacterial activity of black pepper essential oil (BPEO) on Escherichia coli, further evaluate the potential mechanism of action. Results showed that the minimum inhibition concentration (MIC) of BPEO was 1.0 μL/mL. The diameter of inhibition zone values were with range from 17.12 to 26.13 mm. 2 × MIC treatments had lower membrane potential and shorter kill-time than 1 × MIC, while control had the highest values. E. coli treated with BPEO became deformed, pitted, shriveled, adhesive, and broken. 2 × MIC exhibited the greatest electric conductivity at 1, 3, 5, 7, 9, 11, and 13 h, leaked DNA materials at 4, 8, 12, 16, 20, 24, and 28 h, proteins at 4, 6, 8, 10, 12, 14, and 16 h, potassium ion at 0, 0.5, 1, 1.5, and 2 h, phosphate ion at 0.5, 1, 1.5, and 2 h and ATP (P < 0.05); 1 × MIC had higher values than control. BPEO led to the leakage, disorder and death by breaking cell membrane. This study suggested that the BPEO has potential as the natural antibacterial agent in meat industry.
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Affiliation(s)
- Jing Zhang
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province - Department of Food Science, Ningbo University Ningbo, China
| | - Ke-Ping Ye
- Key Laboratory of Animal Products Processing - Ministry of Agriculture, College of Food Science and Technology, Nanjing Agricultural University Nanjing, China
| | - Xin Zhang
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province - Department of Food Science, Ningbo University Ningbo, China
| | - Dao-Dong Pan
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province - Department of Food Science, Ningbo University Ningbo, China
| | - Yang-Ying Sun
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province - Department of Food Science, Ningbo University Ningbo, China
| | - Jin-Xuan Cao
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province - Department of Food Science, Ningbo University Ningbo, China
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Yang J, Sun GJ, Li YQ, Cui KY, Mo HZ. Antibacterial characteristics of glycinin basic polypeptide against Staphylococcus aureus. Food Sci Biotechnol 2016; 25:1477-1483. [PMID: 30263433 PMCID: PMC6049286 DOI: 10.1007/s10068-016-0229-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 08/01/2016] [Accepted: 08/04/2016] [Indexed: 11/27/2022] Open
Abstract
This paper aims to study the antibacterial action of glycinin basic polypeptide (GBP) on Staphylococcus aureus (S. aureus). Herein, the minimum inhibitory concentration (MIC) of GBP against S. aureus was 0.2 mg/mL. Atomic force microscopy (AFM) imaging showed that GBP seriously damaged the morphology of the S. aureus cells. GBP (0.8 mg/mL) enhanced the relative release of β-galactosidase to 25.48% when compared to the control. The activity of the respiratory-chain dehydrogenase of S. aureus decreased with increasing GBP concentration. GBP could cause a leakage of intracellular substances. Additionally, sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) demonstrated that S. aureus bacterial proteins decreased in response to the time period of treating the bacterial cells with GBP. These results indicate that GBP could remarkably inhibit S. aureus and is, therefore, a potential food preservative.
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Affiliation(s)
- Jie Yang
- School of Food Science and Engineering, Qilu University of Technology, No. 3501 University Road of Changqing District, 250353 Jinan, Shandong, China
| | - Gui-Jin Sun
- School of Food Science and Engineering, Qilu University of Technology, No. 3501 University Road of Changqing District, 250353 Jinan, Shandong, China
| | - Ying-Qiu Li
- School of Food Science and Engineering, Qilu University of Technology, No. 3501 University Road of Changqing District, 250353 Jinan, Shandong, China
| | - Kai-Yu Cui
- School of Food Science and Engineering, Qilu University of Technology, No. 3501 University Road of Changqing District, 250353 Jinan, Shandong, China
| | - Hai Zhen Mo
- School of Food Science, Henan Institute of Science and Technology, Xinxiang, 453003 China
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Zhan YY, Liang BQ, Gu EM, Hu XX, Lin D, Hu GX, Zheng ZQ. Inhibitory Effect of Apigenin on Pharmacokinetics of Venlafaxine in vivo and in vitro. Pharmacology 2015. [DOI: 10.1159/000437056] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Diao WR, Zhang LL, Feng SS, Xu JG. Chemical composition, antibacterial activity, and mechanism of action of the essential oil from Amomum kravanh. J Food Prot 2014; 77:1740-6. [PMID: 25285491 DOI: 10.4315/0362-028x.jfp-14-014] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Amomum kravanh is widely cultivated and used as a culinary spice. In this work, the chemical composition of the essential oil obtained by hydrodistillation of A. kravanh fruits was analyzed by gas chromatography-mass spectrometry, and 34 components were identified. 1,8-Cineole (68.42%) was found to be the major component, followed by α-pinene (5.71%), α-terpinene (2.63%), and β-pinene (2.41%). The results of antibacterial tests showed that the sensitivities to the essential oil of different foodborne pathogens tested were different based on the Oxford cup method, MIC, and MBC assays, and the essential oil exhibited the best antibacterial activity against Bacillus subtilis, a gram-positive bacterium, and Escherichia coli, a gram-negative bacterium. Growth in the presence of Amomum kravanh at the MIC, as measured by monitoring optical density over time, demonstrated that the essential oil was bacteriostatic after 12 h to both B. subtilis and E. coli. Observations of cell membrane permeability, cell constituent release assay, and transmission electron microscopy indicated that this essential oil may disrupt the cell wall and cell membrane permeability, leading to leakage of intracellular constituents in both B. subtilis and E. coli.
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Affiliation(s)
- Wen-Rui Diao
- College of Life Sciences, Shanxi Normal University, Linfen City 041004, People's Republic of China
| | - Liang-Liang Zhang
- College of Life Sciences, Shanxi Normal University, Linfen City 041004, People's Republic of China
| | - Sai-Sai Feng
- College of Engineering, Shanxi Normal University, Linfen City 041004, People's Republic of China
| | - Jian-Guo Xu
- College of Life Sciences, Shanxi Normal University, Linfen City 041004, People's Republic of China; College of Engineering, Shanxi Normal University, Linfen City 041004, People's Republic of China.
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Abstract
The emergence of microbial resistance is becoming a global problem in clinical and environmental areas. As such, the development of drugs with novel modes of action will be vital to meet the threats created by the rise in microbial resistance. Microbial photodynamic inactivation is receiving considerable attention for its potentialities as a new antimicrobial treatment. This review addresses the interactions between photosensitizers and bacterial cells (binding site and cellular localization), the ultrastructural, morphological and functional changes observed at initial stages and during the course of photodynamic inactivation, the oxidative alterations in specific molecular targets, and a possible development of resistance.
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Nitric oxide mediates hypocrellin accumulation induced by fungal elicitor in submerged cultures of Shiraia bambusicola. Biotechnol Lett 2014; 37:153-9. [PMID: 25214226 DOI: 10.1007/s10529-014-1665-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 09/03/2014] [Indexed: 10/24/2022]
Abstract
Multiple responses of Shiraia bambusicola, including nitric oxide (NO) generation, hypocrellins production and salicylic acid (SA) biosynthesis, were induced by a fungal elicitor prepared from the mycelium of Aspergillum niger. Both the NO donator, sodium nitroprusside, and SA enhanced hypocrellin production without the fungal elicitor. However, the NO scavenger, 2,4-carboxyphenyl-4,4, 5,5- tetramethylimidazoline-1-oxyl-3-oxide (cPTIO) and the SA biosynthesis inhibitor, cinnamic acid (CA), inhibited hypocrellin accumulation in the presence of the elicitor. cPTIO also inhibited SA production induced by the A. niger elicitor. CA failed to inhibit NO production but it significantly inhibited hypocrellin accumulation. Aspergillum niger elicitor induced an NO burst, SA accumulation, and hypocrellin production in S. bambusicola. Therefore, the fungal elicitor was involved in the signaling pathway, which is a mechanism different from that of higher plants.
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Chemical composition, antibacterial activity and mechanism of action of essential oil from seeds of fennel (Foeniculum vulgare Mill.). Food Control 2014. [DOI: 10.1016/j.foodcont.2013.06.056] [Citation(s) in RCA: 347] [Impact Index Per Article: 34.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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The effect of apigenin on pharmacokinetics of imatinib and its metabolite N-desmethyl imatinib in rats. BIOMED RESEARCH INTERNATIONAL 2013; 2013:789184. [PMID: 24369535 PMCID: PMC3863468 DOI: 10.1155/2013/789184] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 10/30/2013] [Indexed: 01/13/2023]
Abstract
The purpose of this study was to determine the effect of apigenin on the pharmacokinetics of imatinib and N-desmethyl imatinib in rats. Healthy male SD rats were randomly divided into four groups: A group (the control group), B group (the long-term administration of 165 mg/kg apigenin for 15 days), C group (a single dose of 165 mg/kg apigenin), and D group (a single dose of 252 mg/kg apigenin). The serum concentrations of imatinib and N-desmethyl imatinib were measured by HPLC, and pharmacokinetic parameters were calculated using DAS 3.0 software. The parameters of AUC(0−t), AUC(0−∞), Tmax, Vz/F, and CLz/F for imatinib in group B were different from those in group A (P < 0.05). Besides, MRT(0−t) and MRT(0−∞) in groups C and D differed distinctly from those in group A as well. The parameters of AUC(0−t) and Cmax for N-desmethyl imatinib in group C were significantly lower than those in group A (P < 0.05); however, compared with groups B and D, the magnitude of effect was modest. Those results indicated that apigenin in the short-term study inhibited the metabolism of imatinib and its metabolite N-desmethyl imatinib, while in the long-term study the metabolism could be accelerated.
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