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Chen M, Wu Z, Zou Y, Peng C, Hao Y, Zhu Z, Shi X, Su B, Ou L, Lai Y, Jia J, Xun M, Li H, Zhu W, Feng Z, Yao M. Phellodendron chinense C.K.Schneid: An in vitro study on its anti-Helicobacter pylori effect. JOURNAL OF ETHNOPHARMACOLOGY 2024; 333:118396. [PMID: 38823658 DOI: 10.1016/j.jep.2024.118396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/15/2024] [Accepted: 05/26/2024] [Indexed: 06/03/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Phellodendron chinense C.K.Schneid(P. chinense Schneid) is known in TCM as Huang Bo, is traditionally used to support gastrointestinal function and alleviate stomach-related ailments, including gastric ulcer bleeding and symptoms of gastroesophageal reflux disease. Helicobacter pylori (H. pylori) is classified by the WHO as a Group 1 carcinogen. However, the specific activity and mechanism of action of P. chinense Schneid against H. pylori infection remain unclear. It has been noted that Huangjiu processing may alter the bitter and cold properties of P. chinense Schneid, but its effect on antimicrobial activity requires further investigation. Additionally, it remains uncertain whether berberine is the sole antimicrobial active component of P. chinense Schneid. AIM OF STUDY This study aims to elucidate the anti-H. pylori infection activity of P. chinense Schneid, along with its mechanism of action and key antimicrobial active components. MATERIALS AND METHODS Phytochemical analysis was carried out by UPLC-MS/MS. HPLC was employed to quantify the berberine content of the extracts. Antimicrobial activity was assessed using the micro broth dilution method. Morphology was observed using SEM. The impact on urease activity was analyzed through in vitro urease enzyme kinetics. RT-qPCR was employed to detect the expression of virulence genes, including adhesin, flagellum, urease, and cytotoxin-related genes. The adhesion effect was evaluated by immunofluorescence staining and agar culture. RESULTS P. chinense Schneid exhibited strong antimicrobial activity against both antibiotic-sensitive and resistant H. pylori strains, with MIC ranging from 40 to 160 μg/mL. Combination with amoxicillin, metronidazole, levofloxacin, and clarithromycin did not result in antagonistic effects. P. chinense Schneid induced alterations in bacterial morphology and structure, downregulated the expression of various virulence genes, and inhibited urease enzyme activity. In co-infection systems, P. chinense Schneid significantly attenuated H. pylori adhesion and urease relative content, thereby mitigating cellular damage caused by infection. Huangjiu processing enhanced the anti-H. pylori activity of P. chinense Schneid. Besides berberine, P. chinense Schneid contained seven other components with anti-H. pylori activity, with palmatine exhibiting the strongest activity, followed by jatrorrhizine. CONCLUSIONS This study sheds light on the potential therapeutic mechanisms of P. chinense Schneid against H. pylori infection, demonstrating its capacity to disrupt bacterial structure, inhibit urease activity, suppress virulence gene transcription, inhibit adhesion, and protect host cells. The anti-H. pylori activity of P. chinense Schneid was potentiated by Huangjiu processing, and additional components beyond berberine were identified as possessing strong anti-H. pylori activity. Notably, jatrorrhizine, a core component of P. chinense Schneid, exhibited significant anti-H. pylori activity, marking a groundbreaking discovery.
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Affiliation(s)
- Meiyun Chen
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107, China.
| | - Ziyao Wu
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China.
| | - Yuanjing Zou
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107, China.
| | - Chang Peng
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107, China.
| | - Yajie Hao
- Lunan Pharmaceutical Group Co., Ltd, Linyi, 276000, Shandong, China.
| | - Zhixiang Zhu
- School of Medicine and Pharmacy (Qingdao), Ocean University of China, Qingdao, 266003, China.
| | - Xiaoyan Shi
- Lunan Pharmaceutical Group Co., Ltd, Linyi, 276000, Shandong, China.
| | - Bingmei Su
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107, China.
| | - Ling Ou
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107, China.
| | - Yuqian Lai
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107, China.
| | - Junwei Jia
- Lunan Pharmaceutical Group Co., Ltd, Linyi, 276000, Shandong, China.
| | - Mingjin Xun
- Lunan Pharmaceutical Group Co., Ltd, Linyi, 276000, Shandong, China.
| | - Hui Li
- Lunan Pharmaceutical Group Co., Ltd, Linyi, 276000, Shandong, China.
| | - Weixing Zhu
- Qingyuan Hospital of Traditional Chinese Medicine, Qingyuan, 511500, China.
| | - Zhong Feng
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107, China; International Pharmaceutical Engineering Lab of Shandong Province, Feixian, 273400, China; Lunan Pharmaceutical Group Co., Ltd, Linyi, 276000, Shandong, China.
| | - Meicun Yao
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107, China.
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Al-Qurainy F, Tarroum M, Khan S, Nadeem M, Gaafar ARZ, Alansi S, Alfarraj NS. Genome Estimation and Phytochemical Compound Identification in the Leaves and Callus of Abrus precatorius: A Locally Endangered Plant from the Flora of Saudi Arabia. PLANTS (BASEL, SWITZERLAND) 2022; 11:567. [PMID: 35214900 PMCID: PMC8877254 DOI: 10.3390/plants11040567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/11/2022] [Accepted: 02/16/2022] [Indexed: 06/14/2023]
Abstract
Abrus precatorius is considered to be a valuable source of natural products for the development of drugs against various diseases. Herein, the genome size and phytochemical compounds in the leaves and callus of A. precatorius were evaluated. The endangered A. precatorius was collected from the Al-Baha mountains, Saudi Arabia and identified based on the phylogenetic analysis of a DNA sequence amplified by ITS1 and ITS4 primers. The callus was induced by the culture of stem explants onto Murashige and Skoog medium (MS) supplemented with various combinations of 2,4-dichlorophenoxyacetic acid (2,4D) and 6-Benzylaminopurine (BAP). The callus with the highest fresh weight (2.03 g) was obtained in the medium containing 0.5µM BA and 5 µM 2,4-D after 8 weeks of culture; thus, the callus of this combination was selected for the genome estimation and phytochemical compound extraction. The genetic stability of the leaves from the donor as well as in the regenerated callus was analyzed by flow cytometry with optimized tomato (2C = 1.96 pg) as an external reference standard. The 2C DNA content was estimated to 1.810 pg ± 0.008 and 1.813 pg ± 0.004 for the leaves and callus, respectively. Then, the total phenol and total flavonoid contents in the methanol extract of the callus and leaves were measured using a spectrophotometer and the High-performance liquid chromatography (HPLC ) methods. The results showed that the methanolic extract of the leaves was higher in total phenols and total flavonoids than the callus extract. Finally, the extracts of callus and leaves were analyzed for phytochemical compound through the Gas chromatography and Mass spectroscopy (GC-MS). A total of 22 and 28 compounds were detected in the callus and leaves, respectively. The comparative analysis showed that 12 compounds of the secondary metabolites were present in both extracts.
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Antimicrobial Air Filter Coating with Plant Extracts Against Airborne Microbes. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10249120] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Antimicrobial air filters are required to protect humans from the risk of secondary bioaerosol pollution as well as airborne particles. Three plant extracts (tea-tree oil, rosemary, and garlic) were selected to replace antimicrobial chemicals in air filters. The antimicrobial activity of plant extracts was investigated using Micrococcus luteus and Escherichia coli. Phytochemicals present in the three plant extracts were identified using a gas chromatograph coupled with a mass spectrometer. The extracts were spray-coated on polyethylene terephthalate filter surfaces using silicate polymeric coating and evaluated via X-ray photoelectron spectroscopy and a scanning electron microscope with energy dispersive spectroscopy. After coating, an increase of 9.1% in the pressure drop was observed. The strain Micrococcus luteus was used to evaluate the antimicrobial activity of the air filter. After bioaerosol exposure, the tea-tree oil-coated filters immediately induced M. luteus cell inactivation (40–55%), whereas the rosemary and garlic coated filters did not. However, 48 h after exposure, a significant M. luteus inactivation of 99.99%, 99.0%, and 99.9% was recorded for concentrations of 2.89, 6.73, and 11.51 mg/cm2 for the tea-tree, rosemary, and garlic extracts, respectively. The coated filters exhibited high antimicrobial activity, thereby indicating significant potential for application as self-cleaning air filters.
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Gu Y, Wang S, Huang L, Sa W, Li J, Huang J, Dai M, Cheng G. Development of Resistance in Escherichia coli ATCC25922 under Exposure of Sub-Inhibitory Concentration of Olaquindox. Antibiotics (Basel) 2020; 9:E791. [PMID: 33182563 PMCID: PMC7696260 DOI: 10.3390/antibiotics9110791] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/07/2020] [Accepted: 10/08/2020] [Indexed: 01/31/2023] Open
Abstract
Quinoxaline1,4-di-N-oxides (QdNOs) are a class of important antibacterial drugs of veterinary use, of which the drug resistance mechanism has not yet been clearly explained. This study investigated the molecular mechanism of development of resistance in Escherichia coli (E. coli) under the pressure of sub-inhibitory concentration (sub-MIC) of olaquindox (OLA), a representative QdNOs drug. In vitro challenge of E. coli with 1/100× MIC to 1/2× MIC of OLA showed that the bacteria needed a longer time to develop resistance and could only achieve low to moderate levels of resistance as well as form weak biofilms. The transcriptomic and genomic profiles of the resistant E. coli induced by sub-MIC of OLA demonstrated that genes involved in tricarboxylic acid cycle, oxidation-reduction process, biofilm formation, and efflux pumps were up-regulated, while genes involved in DNA repair and outer membrane porin were down-regulated. Mutation rates were significantly increased in the sub-MIC OLA-treated bacteria and the mutated genes were mainly involved in the oxidation-reduction process, DNA repair, and replication. The SNPs were found in degQ, ks71A, vgrG, bigA, cusA, and DR76-4702 genes, which were covered in both transcriptomic and genomic profiles. This study provides new insights into the resistance mechanism of QdNOs and increases the current data pertaining to the development of bacterial resistance under the stress of antibacterials at sub-MIC concentrations.
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Affiliation(s)
- Yufeng Gu
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (Y.G.); (S.W.); (L.H.); (W.S.); (J.L.); (J.H.); (M.D.)
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan 430070, China
| | - Shuge Wang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (Y.G.); (S.W.); (L.H.); (W.S.); (J.L.); (J.H.); (M.D.)
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan 430070, China
| | - Lulu Huang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (Y.G.); (S.W.); (L.H.); (W.S.); (J.L.); (J.H.); (M.D.)
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan 430070, China
| | - Wei Sa
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (Y.G.); (S.W.); (L.H.); (W.S.); (J.L.); (J.H.); (M.D.)
| | - Jun Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (Y.G.); (S.W.); (L.H.); (W.S.); (J.L.); (J.H.); (M.D.)
| | - Junhong Huang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (Y.G.); (S.W.); (L.H.); (W.S.); (J.L.); (J.H.); (M.D.)
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan 430070, China
| | - Menghong Dai
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (Y.G.); (S.W.); (L.H.); (W.S.); (J.L.); (J.H.); (M.D.)
| | - Guyue Cheng
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China; (Y.G.); (S.W.); (L.H.); (W.S.); (J.L.); (J.H.); (M.D.)
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan 430070, China
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Rajani P, Rajasekaran C, Vasanthakumari MM, Olsson SB, Ravikanth G, Uma Shaanker R. Inhibition of plant pathogenic fungi by endophytic Trichoderma spp. through mycoparasitism and volatile organic compounds. Microbiol Res 2020; 242:126595. [PMID: 33017769 DOI: 10.1016/j.micres.2020.126595] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 08/11/2020] [Accepted: 09/14/2020] [Indexed: 01/14/2023]
Abstract
Antagonism of plant pathogenic fungi by endophytic fungi is a well-known phenomenon. In plate assays, the antagonism could be due to mycoparasitism, competition for space or antibiosis, involving a chemical diffusate, or a volatile organic compound (VOC). In this study, we demonstrate that besides mycoparasitism, VOCs play a major role in antagonism of pathogenic fungi by four endophytic fungi belonging to the genus Trichoderma. Using a double-plate assay, we show that all the four endophytic Trichoderma species significantly inhibited mycelial growth of three of the four pathogens, (Sclerotinia sclerotiorum-TSS, Sclerotium rolfsii-CSR and Fusarium oxysporum-CFO), while that of Macrophomina phaseolina-CMP was not affected. GC-MS analysis of the pure cultures of one of the endophytic fungi studied, namely, Trichoderma longibrachiatum strain 2 (Acc. No. MK751758) and the pathogens, F. oxysporum-CFO and M. phaseolina-CMP revealed the presence of several VOCs including hydrocarbons, alcohols, ketones, aldehydes, esters, acids, ethers and different classes of terpenes. In mixed double plates, where the endophyte was grown along with either of the two plant pathogens, F. oxysporum-CFO or M. phaseolina-CMP, there was an induction of a number of new VOCs that were not detected in the pure cultures of either the endophyte or the pathogens. Several of these new VOCs are reported to possess antifungal and cytotoxic activity. We discuss these results and highlight the importance of such interactions in endophyte-pathogen interactions.
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Affiliation(s)
- P Rajani
- School of Ecology and Conservation, University of Agricultural Sciences, GKVK Campus, Bengaluru, 560065, India; School of Biosciences and Technology, Vellore Institute of Technology, Vellore, 632014, India
| | - C Rajasekaran
- School of Biosciences and Technology, Vellore Institute of Technology, Vellore, 632014, India.
| | - M M Vasanthakumari
- School of Ecology and Conservation, University of Agricultural Sciences, GKVK Campus, Bengaluru, 560065, India
| | - Shannon B Olsson
- Naturalist-Inspired Chemical Ecology, National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru, 560065, India
| | - G Ravikanth
- Ashoka Trust for Research in Ecology and the Environment, Royal Enclave, Srirampura, Jakkur Post, Bengaluru, 560064, India
| | - R Uma Shaanker
- School of Ecology and Conservation, University of Agricultural Sciences, GKVK Campus, Bengaluru, 560065, India; Ashoka Trust for Research in Ecology and the Environment, Royal Enclave, Srirampura, Jakkur Post, Bengaluru, 560064, India; Department of Crop Physiology, University of Agricultural Sciences, GKVK, Bengaluru, 560065, India
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Noriega-Cisneros R, Peña-Montes DJ, Huerta-Cervantes M, Torres-Martínez R, Huerta M, Manzo-Avalos S, Salgado-Garciglia R, Saavedra-Molina A. Eryngium carlinaeEthanol Extract Corrects Lipid Abnormalities in Wistar Rats with Experimental Diabetes. J Med Food 2020; 23:827-833. [DOI: 10.1089/jmf.2019.0189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Affiliation(s)
- Ruth Noriega-Cisneros
- Faculty of Nursing; Michoacan University of Saint Nicholas of Hidalgo, Morelia, México
| | - Donovan J. Peña-Montes
- Institute of Chemistry and Biological Research; Michoacan University of Saint Nicholas of Hidalgo, Morelia, México
- University Center for Biomedical Research, University of Colima, Colima, México
| | - Maribel Huerta-Cervantes
- Institute of Chemistry and Biological Research; Michoacan University of Saint Nicholas of Hidalgo, Morelia, México
| | - Rafael Torres-Martínez
- Institute of Chemistry and Biological Research; Michoacan University of Saint Nicholas of Hidalgo, Morelia, México
| | - Miguel Huerta
- University Center for Biomedical Research, University of Colima, Colima, México
| | - Salvador Manzo-Avalos
- Institute of Chemistry and Biological Research; Michoacan University of Saint Nicholas of Hidalgo, Morelia, México
| | - Rafael Salgado-Garciglia
- Institute of Chemistry and Biological Research; Michoacan University of Saint Nicholas of Hidalgo, Morelia, México
| | - Alfredo Saavedra-Molina
- Institute of Chemistry and Biological Research; Michoacan University of Saint Nicholas of Hidalgo, Morelia, México
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Doan TQ, Ho DV, Trong Le N, Le AT, Van Phan K, Nguyen HT, Raal A. Chemical composition and anti-inflammatory activity of the essential oil from the leaves of Limnocitrus littoralis (Miq.) Swingle from Vietnam. Nat Prod Res 2019; 35:1550-1554. [PMID: 31429309 DOI: 10.1080/14786419.2019.1652286] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The oil from the leaves of Limnocitrus littoralis (Miq.) Swingle was obtained by hydrodistillation and investigated by gas chromatography combined with mass spectrometry (GC/MS), the anti-inflammatory effect of the oil was examined on a LPS-induced RAW264.7 cells. An aggregate of forty components were identified, representing 93.0% of the oil. This oil was subjugated by monoterpene hydrocarbons (27.7%), sesquiterpene hydrocarbons (32.3%) and oxygenated sesquiterpenes (4.6%). The significant constituents of L. littoralis essential oil were determined as follows; myrcene (24.9%), γ-muurolene (11.0%), and oleic acid (10.3%). The essential oil of L. littoralis showed activity against the nitric oxide (NO) generation with the IC50 value to 12.50 ± 1.19 µg/L. The anti-inflammatory effect of essential oil from the leaves of L. littoralis is reported for the first time.
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Affiliation(s)
- Tuan Quoc Doan
- Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
| | - Duc Viet Ho
- Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
| | - Nhan Trong Le
- Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
| | - Anh Tuan Le
- Mientrung Institute for Scientific Research, Hue City, Vietnam
| | - Kiem Van Phan
- Institute of Marine Biochemistry, VAST, Ha Noi, Vietnam
| | - Hoai Thi Nguyen
- Faculty of Pharmacy, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
| | - Ain Raal
- Institute of Pharmacy, Faculty of Medicine, University of Tartu, Tartu, Estonia
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Antimicrobial potential of myristic acid against Listeria monocytogenes in milk. J Antibiot (Tokyo) 2019; 72:298-305. [PMID: 30787402 DOI: 10.1038/s41429-019-0152-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 12/19/2018] [Accepted: 12/25/2018] [Indexed: 11/08/2022]
Abstract
Listeria monocytogenes (L. monocytogenes), an important food-borne pathogenic microorganism, has resistance immune function to many commonly used drugs. Myristic acid is a traditional Chinese herbal medicine, but it has been rarely used as a food additive, limiting the development of natural food preservatives. In this study, the antibacterial activity and mechanism of myristic acid against L. monocytogenes were studied. The minimum inhibitory concentration (MIC) of myristic acid against 13 L. monocytogenes strains ranged from 64 to 256 μg ml-1. The time-kill assay demonstrated that when myristic acid was added to dairy products, flow cytometry confirmed that myristic acid influenced cell death and inhibited the growth of L. monocytogenes. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and NPN uptake studies illustrated that myristic acid changed the bacterial morphology and membrane structure of L. monocytogenes, which led to rapid cell death. Myristic acid could bind to DNA and lead to changes in DNA conformation and structure, as identified by fluorescence spectroscopy. Our studies provide additional evidence to support myristic acid being used as a natural antibacterial agent and also further fundamental understanding of the modes of antibacterial action.
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Zhang X, Shi C, Liu Z, Pan F, Meng R, Bu X, Xing H, Deng Y, Guo N, Yu L. Antibacterial activity and mode of action of ε-polylysine against Escherichia coli O157:H7. J Med Microbiol 2018; 67:838-845. [DOI: 10.1099/jmm.0.000729] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Xiaowei Zhang
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Ce Shi
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Zuojia Liu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
| | - Fengguang Pan
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Rizeng Meng
- Jilin Entry–Exit Inspection and Quarantine Bureau, Changchun 130062, PR China
| | - Xiujuan Bu
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Heqin Xing
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Yanhong Deng
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Na Guo
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
| | - Lu Yu
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, PR China
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Shi C, Che M, Zhang X, Liu Z, Meng R, Bu X, Ye H, Guo N. Antibacterial activity and mode of action of totarol against Staphylococcus aureus in carrot juice. Journal of Food Science and Technology 2018; 55:924-934. [PMID: 29487434 DOI: 10.1007/s13197-017-3000-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 08/08/2017] [Accepted: 12/18/2017] [Indexed: 11/25/2022]
Abstract
Food contaminated with pathogenic bacteria such as Staphylococcus aureus (S. aureus), represents a serious health risk to human beings. Totarol is an antibacterial novel phenolic diterpenes. In present study, the antibacterial activity of totarol against S. aureus was investigated in a food system. The antibacterial activity of totarol was determined by measuring the zones of inhibition and minimum inhibitory concentrations (MICs). The MICs for S. aureus strains were in the range of 2-4 μg/ml. The probable antibacterial mechanism of totarol was the alteration in cell membranes integrity and permeability, which leading to the leakage of cellular materials. The electric conductivity showed a time- and dose-dependent increasing manner, and we utilized totarol to induce the production of cytoplasmic β-galactosidase in S. aureus. Scanning electron microscopy and transmission electron microscopy analysis further confirmed that S. aureus cell membranes were damaged by totarol. The time-kill assay and detection of the kinetics of S. aureus deactivation in situ indicated that totarol has good preservative activities in a food model. Totarol successfully inhibited S. aureus development in carrot juice, at room temperature (25 °C) and in refrigerator (4 °C) respectively. Our works provided not only additional evidences in support of totarol being regarded as a natural antibacterial food preservative but also fundamental understanding on the mode of antibacterial action. It is necessary to consider that totarol will become a promising antibacterial additive for food preservative.
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Affiliation(s)
- Ce Shi
- 1Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, 130062 Changchun, People's Republic of China
| | - Meiyao Che
- 1Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, 130062 Changchun, People's Republic of China
| | - Xiaowei Zhang
- 1Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, 130062 Changchun, People's Republic of China
| | - Zuojia Liu
- 2State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun, People's Republic of China
| | - Rizeng Meng
- Jilin Entry-Exit Inspection and Quarantine Bureau, 130062 Changchun, People's Republic of China
| | - Xiujuan Bu
- 1Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, 130062 Changchun, People's Republic of China
| | - Haiqing Ye
- 1Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, 130062 Changchun, People's Republic of China
| | - Na Guo
- 1Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, 130062 Changchun, People's Republic of China
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Antibacterial potential of electrochemically exfoliated graphene sheets. J Colloid Interface Sci 2017; 500:30-43. [DOI: 10.1016/j.jcis.2017.03.110] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 03/28/2017] [Accepted: 03/28/2017] [Indexed: 01/13/2023]
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Fyhrquist P, Virjamo V, Hiltunen E, Julkunen-Tiitto R. Epidihydropinidine, the main piperidine alkaloid compound of Norway spruce (Picea abies) shows promising antibacterial and anti-Candida activity. Fitoterapia 2017; 117:138-146. [PMID: 28163074 DOI: 10.1016/j.fitote.2017.01.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 01/23/2017] [Accepted: 01/29/2017] [Indexed: 01/26/2023]
Abstract
This study reports for the first time promising antibacterial and antifungal effects of epidihydropinidine, the major piperidine alkaloid in the needles and bark of Norway spruce, Picea abies (L.) Karsten. Epidihydropinidine was growth inhibitory against all bacterial and fungal strains used in our investigation, showing the lowest MIC value of 5.37μg/mL against Pseudomonas aeruginosa, Enterococcus faecalis, Candida glabrata and C. albicans. Epidihydropinidine was nearly three times more active than tetracycline against P. aeruginosa and E. faecalis. Promising antibacterial effects were also recorded against Staphylococcus aureus and Bacillus cereus (MIC 10.75μg/mL) as well as against Salmonella enterica (MIC and MBC 43μg/mL). Our preliminary results suggest that epidihydropinidine as well related alkaloids of Norway spruce could be powerful candidates for new antibiotics and for preventing food spoilage.
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Affiliation(s)
- Pia Fyhrquist
- Division of Pharmaceutical Biosciences, Faculty of Pharmacy, P.O. Box 56, FIN-00014, University of Helsinki, Finland.
| | - Virpi Virjamo
- Natural Product Research Laboratory, Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 111, Joensuu, Finland
| | - Eveliina Hiltunen
- Natural Product Research Laboratory, Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 111, Joensuu, Finland
| | - Riitta Julkunen-Tiitto
- Natural Product Research Laboratory, Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 111, Joensuu, Finland
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13
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Xu F, Cheng G, Hao H, Wang Y, Wang X, Chen D, Peng D, Liu Z, Yuan Z, Dai M. Mechanisms of Antibacterial Action of Quinoxaline 1,4-di- N-oxides against Clostridium perfringens and Brachyspira hyodysenteriae. Front Microbiol 2016; 7:1948. [PMID: 28018297 PMCID: PMC5147047 DOI: 10.3389/fmicb.2016.01948] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 11/21/2016] [Indexed: 11/24/2022] Open
Abstract
Quinoxaline 1,4-di-N-oxides (QdNOs) are a class of bioreductive compounds, however, their antibacterial mechanisms are still unclarified. The aim of this study was to assess the ability of two representative QdNO drugs, cyadox (CYA) and olaquindox (OLA), to produce reactive oxide species (ROS) in Gram-positive anaerobe Clostridium perfringens CVCC1125 and Gram-negative anaerobe Brachyspira hyodysenteriae B204. In addition, the effects of QdNOs on the integrity of bacterial cell walls and membranes as well as the morphological alterations and DNA oxidative damage in C. perfringens and B. hyodysenteriae were analyzed. It was demonstrated that under anaerobic conditions, QdNOs were metabolized into the reduced products which did not show any antibacterial activity. A significant dose-related increase of intracellular ROS level and intracellular hydroxyl radicals were evident in bacteria exposed to QdNOs. The result of biochemical assay showed that the cell walls and membranes of the bacteria treated with QdNOs were damaged. After exposure to 1/2MIC to 4MIC of CYA and OLA, C. perfringens and B. hyodysenteriae became elongated and filamentous. Morphological observation with scanning and transmission electron microscopes revealed rupture, loss of cytoplasmic material and cell lysis in QdNO-treated bacteria, indicating serious damage of cells. There was an increase of 8-OHdG in the two strains treated by QdNOs, but it was lower in C. perfringens CVCC1125 than in B. hyodysenteriae B204. Agarose gel electrophoresis showed the degradation of chromosomal DNA in both of the two anaerobes treated by QdNOs. The results suggest that QdNOs may kill C. perfringens and B. hyodysenteriae via the generation of ROS and hydroxyl radicals from the bacterial metabolism of QdNOs, which cause oxidative damage in bacteria under anaerobic conditions.
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Affiliation(s)
- Fanfan Xu
- National Reference Laboratory of Veterinary Drug Residues (HZAU), Ministry of Agriculture Key Laboratory for the Detection of Veterinary Drug Residues in Foods, Huazhong Agricultural University Wuhan, China
| | - Guyue Cheng
- Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
| | - Haihong Hao
- Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
| | - Yulian Wang
- National Reference Laboratory of Veterinary Drug Residues (HZAU), Ministry of Agriculture Key Laboratory for the Detection of Veterinary Drug Residues in Foods, Huazhong Agricultural UniversityWuhan, China; Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural UniversityWuhan, China
| | - Xu Wang
- Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
| | - Dongmei Chen
- National Reference Laboratory of Veterinary Drug Residues (HZAU), Ministry of Agriculture Key Laboratory for the Detection of Veterinary Drug Residues in Foods, Huazhong Agricultural UniversityWuhan, China; Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural UniversityWuhan, China
| | - Dapeng Peng
- National Reference Laboratory of Veterinary Drug Residues (HZAU), Ministry of Agriculture Key Laboratory for the Detection of Veterinary Drug Residues in Foods, Huazhong Agricultural UniversityWuhan, China; Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural UniversityWuhan, China
| | - Zhenli Liu
- National Reference Laboratory of Veterinary Drug Residues (HZAU), Ministry of Agriculture Key Laboratory for the Detection of Veterinary Drug Residues in Foods, Huazhong Agricultural UniversityWuhan, China; Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural UniversityWuhan, China
| | - Zonghui Yuan
- National Reference Laboratory of Veterinary Drug Residues (HZAU), Ministry of Agriculture Key Laboratory for the Detection of Veterinary Drug Residues in Foods, Huazhong Agricultural UniversityWuhan, China; Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural UniversityWuhan, China
| | - Menghong Dai
- Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
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14
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Matijašević D, Pantić M, Rašković B, Pavlović V, Duvnjak D, Sknepnek A, Nikšić M. The Antibacterial Activity of Coriolus versicolor Methanol Extract and Its Effect on Ultrastructural Changes of Staphylococcus aureus and Salmonella Enteritidis. Front Microbiol 2016; 7:1226. [PMID: 27540376 PMCID: PMC4972825 DOI: 10.3389/fmicb.2016.01226] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 07/22/2016] [Indexed: 11/13/2022] Open
Abstract
The antibacterial activity of methanol extract obtained from fruiting body of industrially grown basidiomycete Coriolus versicolor was examined. The Minimum Inhibitory Concentration (MIC) values against various bacteria ranged from 0.625 to 20 mg mL(-1). C. versicolor expressed bactericidal activity against both Gram-positive and Gram-negative bacteria. The growth curves of Staphylococcus aureus and Salmonella enterica serovar Enteritidis, measured at 630 nm, and confirmed with macrodilution method showed that the obtained extract could inhibit the growth of tested bacteria. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and the loss of 260-nm-absorbing material were used to examine the ultrastructural changes in bacteria induced by the extract. When S. aureus was exposed to the MIC of C. versicolor, elongated and malformed cells were observed by SEM, while S. Enteritidis treated cells appeared shorter and aggregated with ruptured cell walls. TEM revealed the formation of non-membrane-enclosed bodies and depleted inner content of S. aureus. Larger and irregular periplasmic space and deformed and scattered components of the cell envelope were observed in treated S. Enteritidis. The loss of 260-nm-absorbing material indicated that the disruptive action of the extract on cytoplasmic membrane was more pronounced in S. aureus than in S. Enteritidis treated cells. The UV and FTIR spectrophotometric analyses revealed diverse composition of C. versicolor extract and high content of total phenolics. Altogether, mushroom extracts could be used to develop nutraceuticals or drugs effective against pathogenic microorganisms.
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Affiliation(s)
- Danka Matijašević
- Institute for Food Technology and Biochemistry, Faculty of Agriculture, University of BelgradeBelgrade, Serbia
| | - Milena Pantić
- Institute for Food Technology and Biochemistry, Faculty of Agriculture, University of BelgradeBelgrade, Serbia
| | - Božidar Rašković
- Institute of Animal Sciences, Faculty of Agriculture, University of BelgradeBelgrade, Serbia
| | - Vladimir Pavlović
- Institute of Agricultural Engineering, Faculty of Agriculture, University of BelgradeBelgrade, Serbia
| | - Dunja Duvnjak
- Institute for Food Technology and Biochemistry, Faculty of Agriculture, University of BelgradeBelgrade, Serbia
| | - Aleksandra Sknepnek
- Institute for Food Technology and Biochemistry, Faculty of Agriculture, University of BelgradeBelgrade, Serbia
| | - Miomir Nikšić
- Institute for Food Technology and Biochemistry, Faculty of Agriculture, University of BelgradeBelgrade, Serbia
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15
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Antibacterial and modifying-antibiotic activities of the essential oils of Ocimum gratissimum L. and Plectranthus amboinicus L. Eur J Integr Med 2015. [DOI: 10.1016/j.eujim.2014.10.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Kim S, Lee H, Lee S, Yoon Y, Choi KH. Antimicrobial action of oleanolic acid on Listeria monocytogenes, Enterococcus faecium, and Enterococcus faecalis. PLoS One 2015; 10:e0118800. [PMID: 25756202 PMCID: PMC4355482 DOI: 10.1371/journal.pone.0118800] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 01/06/2015] [Indexed: 01/11/2023] Open
Abstract
This study investigated the antimicrobial action of oleanolic acid against Listeria monocytogenes, Enterococcus faecium, and Enterococcus faecalis. To determine the cytotoxicity of oleanolic acid, HEp-2 cells were incubated with oleanolic acid at 37oC. MICs (minimal inhibition concentrations) for L. monocytogenes, E. faecium, and E. faecalis were determined using two-fold microdilutions of oleanolic acid, and bacterial cell viability was then assessed by exposing the bacteria to oleanolic acid at 2 × MIC. To investigate the mode of antimicrobial action of oleanolic acid, we measured leakage of compounds absorbing at 280 nm, along with propidium iodide uptake. Scanning electron microscope (SEM) images were also analysed. The viability of HEp-2 cells decreased (P < 0.05) at oleanolic acid concentrations greater than 128 μg mL-1. The MICs were 16-32 μg mL-1 for L. monocytogenes and 32-64 μg mL-1 for E. faecium and E. faecalis, and bacterial cell viability decreased (P < 0.05) about 3-4 log CFU mL-1 after exposure to 2 × MIC of oleanolic acid. Leakage of 280 nm absorbing materials and propidium iodide uptake was higher in oleanolic acid –treated cells than in the control. The cell membrane was damaged in oleanolic acid-treated cells, but the control group had intact cell membrane in SEM images. The results indicate that oleanolic acid can kill L. monocytogenes, E. faecium, and E. faecalis by destroying the bacterial cell membrane.
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Affiliation(s)
- Sejeong Kim
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
| | - Heeyoung Lee
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
| | - Soomin Lee
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
| | - Yohan Yoon
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
- * E-mail: (YY); (KHC)
| | - Kyoung-Hee Choi
- Department of Oral Microbiology, College of Dentistry, Wonkwang University, Iksan, Jeonbuk, South Korea
- * E-mail: (YY); (KHC)
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