1
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Le TKD, Duong TH, Nguyen HT, Pham NKT, Vo TPG, Nguyen NH, Niamnont N, Sichaem J, Tran TMD. Antimicrobial sesquiterpenes from the cultured mycobiont Diorygma pruinosum against methicillin-resistant Staphylococcus aureus isolated from Vietnamese street foods. RSC Adv 2024; 14:4871-4879. [PMID: 38323014 PMCID: PMC10844926 DOI: 10.1039/d3ra07112j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 01/28/2024] [Indexed: 02/08/2024] Open
Abstract
Traditionally, lichen has been used for many purposes, but there remains a lack of understanding regarding the chemical composition and antimicrobial characteristics of Diorygma pruinosum, a lichen native to Vietnam. In this study, four sesquiterpenes, diorygmones B-E (1-4), one phenolic compound, 3,5-dihydroxy-4-methoxybenzoic acid (5), and one sterol, β-sitosterol (6), were isolated and structurally elucidated from the cultured mycobiont of the lichen Diorygma pruinosum. Additionally, two compounds, stictic acid (7) and norstictic acid (8), were also isolated from the lichen D. pruinosum. Compounds 2-4 were new compounds. Their chemical structures were established using comprehensive spectroscopic data, and the absolute configurations were confirmed through the analysis of NOESY and electronic circular dichroism (ECD). Moreover, Staphylococcus aureus, a Gram-positive bacterium, has been responsible for various infections, including food poisoning. Herein, we identified and isolated 13 strains of S. aureus from street food sources. Among these strains, one was identified as a multidrug-resistant variant, designated as SAX15, and was subsequently used for further antimicrobial testing. Compounds 1-3 produced zones of inhibition against S. aureus SAX15 (each 5 mm) in comparison to commercial drugs such as penicillin, ciprofloxacin, gentamicin, cefoxitin, and clarithromycin, which displayed inhibitory zones of 7, 5, 10, 9.7, and 7 mm, respectively.
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Affiliation(s)
- Thi-Kim-Dung Le
- Laboratory of Biophysics, Institute for Advanced Study in Technology, Ton Duc Thang University Ho Chi Minh City 700000 Vietnam
- Faculty of Pharmacy, Ton Duc Thang University Ho Chi Minh City 700000 Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education 280 An Duong Vuong Street, District 5 Ho Chi Minh City 700000 Vietnam
| | - Huy Truong Nguyen
- Faculty of Pharmacy, Ton Duc Thang University Ho Chi Minh City 700000 Vietnam
| | - Nguyen-Kim-Tuyen Pham
- Faculty of Environment, Sai Gon University 273 An Duong Vuong, Ward 3, District 5 Ho Chi Minh City 700000 Vietnam
| | - Thi-Phi-Giao Vo
- Faculty of Biology and Biotechnology, University of Science, Vietnam National University Ho Chi Minh City Ho Chi Minh City 700000 Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, HUTECH University 475 A Dien Bien Phu Street, Binh Thanh District Ho Chi Minh City 700000 Vietnam
| | - Nakorn Niamnont
- Organic Synthesis, Electrochemistry & Natural Product Research Unit, Department of Chemistry, Faculty of Science, King Mongkut's University of Technology Thonburi Bangkok 10140 Thailand
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus Lampang 52190 Thailand
| | - Thi-Minh-Dinh Tran
- Department of Biology, Ho Chi Minh City University of Education 280 An Duong Vuong Street, District 5 Ho Chi Minh City 700000 Vietnam
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2
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Kumar R V, Gosipatala SB, Kumar R, Srivastava D, Singh V, Suman K, Tripathi DK, Verma A, Mishra A, Vishwakarma KK, Singh SA, Pandey T, Agarwal S, Elyies M, Singh I, Sah PK, Sharma C, Parag R, Saxena P, Raj A, Tripathi A, Devi P, Poluri KM. Characterization, Antioxidant, and Antimicrobial Properties of Mulberry Lattices. ACS OMEGA 2023; 8:47758-47772. [PMID: 38144072 PMCID: PMC10733998 DOI: 10.1021/acsomega.3c06069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/31/2023] [Accepted: 11/13/2023] [Indexed: 12/26/2023]
Abstract
In order to find the most advantageous bioactive compounds from mulberry latex for drug development in the near future, this study was conducted to characterize and evaluate antioxidant and antimicrobial properties from four different mulberry lattices (BR-2, S-1, AR-14, and S-146). The characterization of the lattices was performed by scanning electron microscopy with energy-dispersive X-ray spectroscopy, gas chromatography coupled to mass spectroscopy, and Fourier transform infrared spectroscopy. Further, screenings of the antioxidant and antimicrobial potential of selected lattices were performed in vitro using 2,2-diphenyl-1-picrylhydrazyl assay and agar well diffusion methods, respectively. Interestingly, the outcome of the current study revealed that tested mulberry lattices contain a considerable amount of bioactive phytoconstituents, particularly antimicrobial and antioxidant compounds, as revealed by chromatographic analysis. BR-2 latex was found to have significant antioxidant activity (75%) followed by S-146 (64.6%) and AR-14 (52.9%). The maximum antimicrobial activity was found in BR-2 latex compared to other tested latex varieties. The results of this investigation showed that mulberry latex from the BR-2 type may successfully control both bacterial and fungal infections, with the added benefit of having enhanced antioxidant capabilities.
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Affiliation(s)
- Venkatesh Kumar R
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Sunil Babu Gosipatala
- Departmentof
Biotechnology, Babasaheb Bhimrao Ambedkar
University, Lucknow, Uttar Pradesh 226025, India
| | - Ram Kumar
- Department
of Zoology, Shri Venkateshwara University, Gajraula, Uttar Pradesh 244236, India
| | - Devika Srivastava
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Vandana Singh
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Kusumala Suman
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Deepak Kumar Tripathi
- Department
of Biosciences and Bioengineering, Indian
Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | - Abhishek Verma
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Akash Mishra
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Karan Kumar Vishwakarma
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Stuti Annapurna Singh
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Tripti Pandey
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Sanskrati Agarwal
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Mohd Elyies
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Ishani Singh
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Pinky Kumari Sah
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Chaya Sharma
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Rishabh Parag
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Pragya Saxena
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Akanksha Raj
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Anshika Tripathi
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Poonam Devi
- Department
of Zoology, Babasaheb Bhimrao Ambedkar University, Lucknow, Uttar Pradesh 226025, India
| | - Krishna Mohan Poluri
- Department
of Biosciences and Bioengineering, Indian
Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
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3
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Hu H, Tekin V, Hu B, Yaghoobi M, Khan A, Ghosh AK, Panda SK, Huang H, Luyten W. Metabolic profiling of Chimonanthus grammatus via UHPLC-HRMS-MS with computer-assisted structure elucidation and its antimicrobial activity. FRONTIERS IN PLANT SCIENCE 2023; 14:1138913. [PMID: 37229132 PMCID: PMC10205022 DOI: 10.3389/fpls.2023.1138913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 03/27/2023] [Indexed: 05/27/2023]
Abstract
Chimonanthus grammatus is used as Hakka traditional herb to treat cold, flu, etc. So far, the phytochemistry and antimicrobial compounds have not been well investigated. In this study, the orbitrap-ion trap MS was used to characterize its metabolites, combined with a computer-assisted structure elucidation method, and the antimicrobial activities were assessed by a broth dilution method against 21 human pathogens, as well as the bioassay-guided purification work to clarify its main antimicrobial compounds. A total of 83 compounds were identified with their fragmentation patterns, including terpenoids, coumarins, flavonoids, organic acids, alkaloids, and others. The plant extracts can strongly inhibit the growth of three Gram-positive and four Gram-negative bacteria, and nine active compounds were bioassay-guided isolated, including homalomenol C, jasmonic acid, isofraxidin, quercitrin, stigmasta-7,22-diene-3β,5α,6α-triol, quercetin, 4-hydroxy-1,10-secocadin-5-ene-1,10-dione, kaempferol, and E-4-(4,8-dimethylnona-3,7-dienyl)furan-2(5H)-one. Among them, isofraxidin, kaempferol, and quercitrin showed significant activity against planktonic Staphylococcus aureus (IC50 = 13.51, 18.08 and 15.86 µg/ml). Moreover, their antibiofilm activities of S. aureus (BIC50 = 15.43, 17.31, 18.86 µg/ml; BEC50 = 45.86, ≥62.50, and 57.62 µg/ml) are higher than ciprofloxacin. The results demonstrated that the isolated antimicrobial compounds played the key role of this herb in combating microbes and provided benefits for its development and quality control, and the computer-assisted structure elucidation method was a powerful tool for chemical analysis, especially for distinguishing isomers with similar structures, which can be used for other complex samples.
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Affiliation(s)
- Haibo Hu
- National Engineering Research Center for Modernization of Traditional Chinese Medicine - Hakka Medical Resources Branch, School of Pharmacy, Gannan Medical University, Ganzhou, China
- Animal Physiology and Neurobiology Section, Department of Biology, KU Leuven, Leuven, Belgium
| | - Volkan Tekin
- Animal Physiology and Neurobiology Section, Department of Biology, KU Leuven, Leuven, Belgium
| | - Bin Hu
- National Engineering Research Center for Modernization of Traditional Chinese Medicine - Hakka Medical Resources Branch, School of Pharmacy, Gannan Medical University, Ganzhou, China
| | - Mahdi Yaghoobi
- Animal Physiology and Neurobiology Section, Department of Biology, KU Leuven, Leuven, Belgium
- Department of Phytochemistry, Medicinal Plants and Drug Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Ajmal Khan
- Animal Physiology and Neurobiology Section, Department of Biology, KU Leuven, Leuven, Belgium
- Leishmania Diagnostic & Drug Delivery Research Laboratory, University of Peshawar, Peshawar, Pakistan
| | - Alokesh Kumar Ghosh
- Animal Physiology and Neurobiology Section, Department of Biology, KU Leuven, Leuven, Belgium
- Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna, Bangladesh
| | - Sujogya Kumar Panda
- Animal Physiology and Neurobiology Section, Department of Biology, KU Leuven, Leuven, Belgium
- Center of Environment Climate Change and Public Health, Utkal University, Vani Vihar, Bhubaneswar, Odisha, India
| | - Hao Huang
- National Engineering Research Center for Modernization of Traditional Chinese Medicine - Hakka Medical Resources Branch, School of Pharmacy, Gannan Medical University, Ganzhou, China
| | - Walter Luyten
- Animal Physiology and Neurobiology Section, Department of Biology, KU Leuven, Leuven, Belgium
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4
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Nguyen HH, Aree T, Nguyen HT, Tran TMD, Nguyen TP, Vo TPG, Nguyen NH, Duong TH. Diorygmones A-B, two new guaiane-sesquiterpenes from the cultured lichen mycobiont of Diorygma sp.. Nat Prod Res 2023:1-6. [PMID: 36724809 DOI: 10.1080/14786419.2023.2172007] [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: 11/08/2022] [Revised: 01/05/2023] [Accepted: 01/15/2023] [Indexed: 02/03/2023]
Abstract
Diorygma sp. is a native crustose-lichen in Vietnam. A mycobiont of this lichen was isolated, then cultivated. The present study described the isolation and structural elucidation of two new guaiane-type sesquiterpenes, namely diorygmones A-B. Their absolute chemical structures were elucidated by extensive 1D and 2D NMR analysis, high-resolution mass spectroscopy, electronic circular dichroism (ECD), and comparisons with the literatures. Compounds 1 and 2 were evaluated for cytotoxic activity against HepG2 cell line.
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Affiliation(s)
- Huu-Hung Nguyen
- Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Thammarat Aree
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Huy Truong Nguyen
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Thi-Minh-Dinh Tran
- Department of Biology, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Thi-Phuong Nguyen
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
| | - Thi-Phi Giao Vo
- Faculty of Biology-Biotechnology, University of Science, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Ngoc-Hong Nguyen
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- CirTech Institute, HUTECH University, Ho Chi Minh City, Vietnam
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5
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Kumar M, Hasan M, Lorenzo JM, Dhumal S, Nishad J, Rais N, Verma A, Changan S, Barbhai MD, Radha, Chandran D, Pandiselvam R, Senapathy M, Dey A, Pradhan PC, Mohankumar P, Deshmukh VP, Amarowicz R, Mekhemar M, Zhang B. Jamun (Syzygium cumini (L.) Skeels) seed bioactives and its biological activities: A review. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Li HY, Yang WQ, Zhou XZ, Shao F, Shen T, Guan HY, Zheng J, Zhang LM. Antibacterial and Antifungal Sesquiterpenoids: Chemistry, Resource, and Activity. Biomolecules 2022; 12:1271. [PMID: 36139108 PMCID: PMC9496053 DOI: 10.3390/biom12091271] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/06/2022] [Accepted: 09/06/2022] [Indexed: 11/29/2022] Open
Abstract
Infectious diseases caused by bacteria and fungi are threatening human health all over the world. It is an increasingly serious problem that the efficacies of some antibacterial and antifungal agents have been weakened by the drug resistance of some bacteria and fungi, which makes a great need for new antibiotics. Sesquiterpenoids, with abundant structural skeleton types and a wide range of bioactivities, are considered as good candidates to be antibacterial and antifungal agents. In the past decades, many sesquiterpenoids were isolated from plants and fungi that exhibited good antibacterial and antifungal activities. In this review, the names, source, structures, antibacterial and antifungal degrees, and mechanisms of sesquiterpenoids with antibacterial and antifungal activity from 2012 to 2022 are summarized, and the structure-activity relationship of these sesquiterpenoids against bacteria and fungi is also discussed.
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Affiliation(s)
- Hang-Ying Li
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Research Center of Modern Hui Medicine Engineering and Technology, Ningxia Medical University, Yinchuan 750004, China
- Key Laboratory of Ningxia Ethnomedicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan 750004, China
| | - Wen-Qian Yang
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Xin-Zhu Zhou
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Fei Shao
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Tong Shen
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Hui-Ying Guan
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Jie Zheng
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Research Center of Modern Hui Medicine Engineering and Technology, Ningxia Medical University, Yinchuan 750004, China
- Key Laboratory of Ningxia Ethnomedicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan 750004, China
| | - Li-Ming Zhang
- College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Research Center of Modern Hui Medicine Engineering and Technology, Ningxia Medical University, Yinchuan 750004, China
- Key Laboratory of Ningxia Ethnomedicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan 750004, China
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7
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Tak Y, Kaur M, Jain MC, Samota MK, Meena NK, Kaur G, Kumar R, Sharma D, Lorenzo JM, Amarowicz R. Jamun Seed: A Review on Bioactive Constituents, Nutritional Value and Health Benefits. POL J FOOD NUTR SCI 2022. [DOI: 10.31883/pjfns/152568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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8
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Liu W, Li M, Wang G, Ma H, Mu Y, Zheng D, Huang X, Li L. New Monoterpene Acid and Gallic Acid Glucose Esters with Anti-Inflammatory Activity from Blue Gum ( Eucalyptus globulus) Leaves. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:4981-4994. [PMID: 35420422 DOI: 10.1021/acs.jafc.2c00828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Blue gum (Eucalyptus globulus) is a widely used botanical in the cosmeceutical and food industries. Although blue gum leaves are known for abundant essential oils, their nonvolatile phytochemical constituents and bioactivities remain unclear. Herein, a phytochemical investigation of blue gum leaves led to the identification of eight new monoterpene acid and gallic acid glucose esters (1-4 and 14-17; glubosides A-H, respectively) and 12 known analogues (5-13 and 18-20). Their structures were determined based on extensive spectroscopic data analysis, chemical degradation, and chiral separation. Oleuropeic acid conjugated glucose esters (1-13, 15, 16, 18, and 20) are reported as epimeric mixtures. Compounds 7, 12, 14, 19, and 20 (at 30 μM) inhibited nitrite release in lipopolysaccharide (LPS)-stimulated RAW264.7 cells. Compounds 7 and 14 (at 3-30 μM) also down-regulated proinflammatory biomarkers, including cytokines (TNF-α, IL-6, and IL-1β), protein expression (iNOS and COX-2), and transcription factor nuclear translocation (NF-κB) in LPS-stimulated RAW264.7 cells. This work highlights the anti-inflammatory potential of phytochemicals from blue gum leaves, which supports their further development as cosmeceutical and/or nutraceutical products.
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Affiliation(s)
- Wei Liu
- Institute of Microbial Pharmaceuticals, College of Life and Health Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Minglei Li
- Institute of Microbial Pharmaceuticals, College of Life and Health Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Guihua Wang
- Institute of Microbial Pharmaceuticals, College of Life and Health Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Hang Ma
- Bioactive Botanical Research Laboratory, Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Yu Mu
- Institute of Microbial Pharmaceuticals, College of Life and Health Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Dan Zheng
- Institute of Microbial Pharmaceuticals, College of Life and Health Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Xueshi Huang
- Institute of Microbial Pharmaceuticals, College of Life and Health Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Liya Li
- Institute of Microbial Pharmaceuticals, College of Life and Health Sciences, Northeastern University, Shenyang 110819, P. R. China
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9
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Christopher A, Brandes D, Kelly S, Minehan TG. n-Butyllithium-Induced Tandem [3,3]-Sigmatropic Rearrangement and Carbonyl Olefination of Allyl-1,1-dichlorovinyl Ethers. J Org Chem 2021; 86:17487-17495. [PMID: 34761941 DOI: 10.1021/acs.joc.1c02178] [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
Exposure of dichlorovinyl ethers 1 to n-butyllithium and addition of saturated or unsaturated aldehydes, ketones, or esters at ambient temperature furnishes rearranged α,β-unsaturated carboxylic acids, isolated as their corresponding methyl esters 2 in 48-91% overall yields. Exposure of dichlorovinyl ethers 1 to n-butyllithium, addition of aldehydes, ketones, dialdehydes, or diketones at -78 °C, and warming to 80 °C in the presence of SiO2 provide 1,4-dienes 3 or cycloalken-1-ols (or their dehydration products) 4 in 45-72% overall yields.
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Affiliation(s)
- Aaron Christopher
- Department of Chemistry and Biochemistry, California State University, Northridge, 18111 Nordhoff Street, Northridge, California 91330, United States
| | - Dahniel Brandes
- Department of Chemistry and Biochemistry, California State University, Northridge, 18111 Nordhoff Street, Northridge, California 91330, United States
| | - Stephen Kelly
- Department of Chemistry and Biochemistry, California State University, Northridge, 18111 Nordhoff Street, Northridge, California 91330, United States
| | - Thomas G Minehan
- Department of Chemistry and Biochemistry, California State University, Northridge, 18111 Nordhoff Street, Northridge, California 91330, United States
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10
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Abstract
Current strategies of combating bacterial infections are limited and involve the use of antibiotics and preservatives. Each of these agents has generally inadequate efficacy and a number of serious adverse effects. Thus, there is an urgent need for new antimicrobial drugs and food preservatives with higher efficacy and lower toxicity. Edible plants have been used in medicine since ancient times and are well known for their successful antimicrobial activity. Often photosensitizers are present in many edible plants; they could be a promising source for a new generation of drugs and food preservatives. The use of photodynamic therapy allows enhancement of antimicrobial properties in plant photosensitizers. The purpose of this review is to present the verified data on the antimicrobial activities of photodynamic phytochemicals in edible species of the world’s flora, including the various mechanisms of their actions.
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11
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Ng K, Khoury M, Minehan TG. Total Syntheses and Absolute Configuration Assignment of (+)-Sootepdienone, (-)-Jambolanin C, (-)-Jambolanin I, and (-) -Gibberodione. J Org Chem 2021; 86:3074-3080. [PMID: 33439018 DOI: 10.1021/acs.joc.0c02747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Total syntheses of the sesquiterpenes (+)-sootepdienone, (-)-jambolanin C, (-)-jambolanin I, and (-)-gibberodione have been accomplished in 10 steps each from R-(+)-pulegone, allowing assignment of the absolute configuration of the natural products. A key step in the synthetic pathways involves the one-carbon ring expansion of a cyclic allylic phosphonate to a substituted cycloheptenone by a tandem oxidative cleavage/intramolecular Horner-Wadsworth-Emmons reaction.
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Affiliation(s)
- Kevin Ng
- Department of Chemistry and Biochemistry, California State University, Northridge, 18111 Nordhoff Street, Northridge, California 91330, United States
| | - Michael Khoury
- Department of Chemistry and Biochemistry, California State University, Northridge, 18111 Nordhoff Street, Northridge, California 91330, United States
| | - Thomas Gerard Minehan
- Department of Chemistry and Biochemistry, California State University, Northridge, 18111 Nordhoff Street, Northridge, California 91330, United States
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12
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Xu W, Tan J, Mu Y, Zheng D, Huang X, Li L. New antimicrobial terpenoids and phloroglucinol glucosides from Syzygium szemaoense. Bioorg Chem 2020; 103:104242. [DOI: 10.1016/j.bioorg.2020.104242] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/15/2020] [Accepted: 08/25/2020] [Indexed: 10/23/2022]
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13
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Sharma A, Biharee A, Kumar A, Jaitak V. Antimicrobial Terpenoids as a Potential Substitute in Overcoming Antimicrobial Resistance. Curr Drug Targets 2020; 21:1476-1494. [PMID: 32433003 DOI: 10.2174/1389450121666200520103427] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 04/17/2020] [Accepted: 04/21/2020] [Indexed: 11/22/2022]
Abstract
There was a golden era where everyone thought that microbes can no longer establish threat to humans but the time has come where microbes are proposing strong resistance against the majority of antimicrobials. Over the years, the inappropriate use and easy availability of antimicrobials have made antimicrobial resistance (AMR) to emerge as the world's third leading cause of death. Microorganisms over the time span have acquired resistance through various mechanisms such as efflux pump, transfer through plasmids causing mutation, changing antimicrobial site of action, or modifying the antimicrobial which will lead to become AMR as the main cause of death worldwide by 2030. In order to overcome the emerging resistance against majority of antimicrobials, there is a need to uncover drugs from plants because they have proved to be effective antimicrobials due to the presence of secondary metabolites such as terpenoids. Terpenoids abundant in nature are produced in response to microbial attack have huge potential against various microorganisms through diverse mechanisms such as membrane disruption, anti-quorum sensing, inhibition of protein synthesis and ATP. New approaches like combination therapy of terpenoids and antimicrobials have increased the potency of treatment against various multidrug resistant microorganisms by showing synergism to each other.
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Affiliation(s)
- Aditi Sharma
- Laboratory of Natural Products, Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda, Punjab-151001, India
| | - Avadh Biharee
- Laboratory of Natural Products, Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda, Punjab-151001, India
| | - Amit Kumar
- Laboratory of Natural Products, Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda, Punjab-151001, India
| | - Vikas Jaitak
- Laboratory of Natural Products, Department of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda, Punjab-151001, India
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14
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Zhao M, Guo DL, Liu GH, Fu X, Gu YC, Ding LS, Zhou Y. Antifungal Halogenated Cyclopentenones from the Endophytic Fungus Saccharicola bicolor of Bergenia purpurascens by the One Strain-Many Compounds Strategy. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 68:185-192. [PMID: 31815467 DOI: 10.1021/acs.jafc.9b06594] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Min Zhao
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
- Laboratory of Natural Product Drugs, State Key Laboratory of Biotherapy and Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Da-Le Guo
- The Ministry of Education Key Laboratory of Standardization of Chinese Herbal Medicine, State Key Laboratory, Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, P. R. China
| | - Guang-Hui Liu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
| | - Xian Fu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
| | - Yu-Cheng Gu
- Syngenta Jealott’s Hill International Research Centre, Berkshire RG42 6EY, U.K
| | - Li-Sheng Ding
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
| | - Yan Zhou
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
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15
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Nanoengineering of Gold Nanoparticles: Green Synthesis, Characterization, and Applications. CRYSTALS 2019. [DOI: 10.3390/cryst9120612] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The fundamental aspects of the manufacturing of gold nanoparticles (AuNPs) are discussed in this review. In particular, attention is devoted to the development of a simple and versatile method for the preparation of these nanoparticles. Eco-friendly synthetic routes, such as wet chemistry and biosynthesis with the aid of polymers, are of particular interest. Polymers can act as reducing and/or capping agents, or as soft templates leading to hybrid nanomaterials. This methodology allows control of the synthesis and stability of nanomaterials with novel properties. Thus, this review focus on a fundamental study of AuNPs properties and different techniques to characterize them, e.g., Transmission Electron Microscopy (TEM), Atomic Force Microscopy (AFM), UV-Visible spectroscopy, Dynamic Light Scattering (DLS), X-Ray Diffraction (XRD), X-Ray Photoelectron Spectroscopy, Small-angle X-Ray Scattering (SAXS), and rheology. Recently, AuNPs obtained by “green” synthesis have been applied in catalysis, in medicine, and as antibacterials, sensors, among others.
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16
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Xu J, Liu T, Li Y, Yuan C, Ma H, Seeram NP, Liu F, Mu Y, Huang X, Li L. Hypoglycemic and hypolipidemic effects of triterpenoid-enriched Jamun (Eugenia jambolana Lam.) fruit extract in streptozotocin-induced type 1 diabetic mice. Food Funct 2018; 9:3330-3337. [PMID: 29808185 DOI: 10.1039/c8fo00095f] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The edible berries of Eugenia jambolana Lam. (known as Jamun) are consumed in various parts of the world. Our previous studies revealed that a triterpenoid-enriched Jamun fruit extract (TJFE) showed beneficial effects on glucose homeostasis in non-diabetic mice. Herein, the anti-diabetic effects of TJFE (100 mg kg-1 by oral gavage for ten days) were evaluated in streptozotocin (STZ)-induced type 1 diabetic mice. TJFE significantly attenuated STZ-induced hyperglycemia and glucose intolerance, suppressed the abnormal elevation of hepatic gluconeogenesis, and improved dyslipidemia in the mice. Histopathology and mechanism-based studies revealed that TJFE preserved the architecture and function of pancreatic islets, attenuated insulin secretion deficiency, enhanced insulin/Akt signaling transduction, reduced lipogenic gene expression, and prevented the abnormal activation of Erk MAPK in the liver tissues of the STZ-induced diabetic mice. The current study adds to previously published data supporting the potential beneficial effects of this edible fruit on diabetes management.
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Affiliation(s)
- Jialin Xu
- Institute of Microbial Pharmaceuticals, College of Life and Health Sciences, Northeastern University, Shenyang 110819, People's Republic of China.
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17
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Borah D, Hazarika M, Tailor P, Silva AR, Chetia B, Singaravelu G, Das P. Starch-templated bio-synthesis of gold nanoflowers for in vitro antimicrobial and anticancer activities. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0793-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Abstract
We describe an in situ method of synthesizing highly branched gold nanoflower (AuNFs) using aqueous seed extract of Syzygium cumini (L.) Skeels as reductant in the presence of 0.3% starch. Surprisingly, when the same reaction was carried out in the absence of starch or with starch at a lower concentration (0.15%), instead of flower-like morphology quasi-spherical or polyhedral nanoparticles (AuNPs) are obtained. The nanomaterials were extensively characterized by HRTEM, FESEM, UV–Vis, FTIR, XRD, XPS and TGA analysis. The biological activities of the materials were investigated for antimicrobial activities against four bacterial strains that include one Gram positive (Staphylococcus aureus MTCC 121), two Gram negative (Escherichia coli MTCC 40 and Pseudomonas aeruginosa MTCC 4673) and one fungi (Candida albicans MTCC 227). The nanoparticles functioned as effective antimicrobial and anti-biofilm agents against all the strains under study. Controlled study revealed that, the AuNFs showed improved efficacy over conventional polyhedral AuNPs against all the microbes under study which might be attributed to the larger surface-to-volume ratio of the nanoflowers. The AuNFs also showed effective in vitro anticancer activity against a human liver cancer cell line (HepG2) with no significant cytotoxicity. Our data suggest that the AuNFs can significantly reduce the cancer cell growth with IC50 value of 20 µg mL−1.
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18
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Chhikara N, Kaur R, Jaglan S, Sharma P, Gat Y, Panghal A. Bioactive compounds and pharmacological and food applications of Syzygium cumini– a review. Food Funct 2018. [DOI: 10.1039/c8fo00654g pmid: 30379170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The present review explores the nutritional, phytochemical and pharmacological potential as well as diverse food usages ofSyzygium cumini.
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Affiliation(s)
- Navnidhi Chhikara
- Department of Food Technology and Nutrition
- Lovely Professional University
- India
| | - Ravinder Kaur
- Department of Food Technology and Nutrition
- Lovely Professional University
- India
| | - Sundeep Jaglan
- Division of Microbial Biotechnology
- Indian Institute of Integrative Medicine-CSIR
- India
| | | | - Yogesh Gat
- Department of Food Technology and Nutrition
- Lovely Professional University
- India
| | - Anil Panghal
- Department of Food Technology and Nutrition
- Lovely Professional University
- India
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19
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Chhikara N, Kaur R, Jaglan S, Sharma P, Gat Y, Panghal A. Bioactive compounds and pharmacological and food applications ofSyzygium cumini– a review. Food Funct 2018; 9:6096-6115. [DOI: 10.1039/c8fo00654g] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The present review explores the nutritional, phytochemical and pharmacological potential as well as diverse food usages ofSyzygium cumini.
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Affiliation(s)
- Navnidhi Chhikara
- Department of Food Technology and Nutrition
- Lovely Professional University
- India
| | - Ravinder Kaur
- Department of Food Technology and Nutrition
- Lovely Professional University
- India
| | - Sundeep Jaglan
- Division of Microbial Biotechnology
- Indian Institute of Integrative Medicine-CSIR
- India
| | | | - Yogesh Gat
- Department of Food Technology and Nutrition
- Lovely Professional University
- India
| | - Anil Panghal
- Department of Food Technology and Nutrition
- Lovely Professional University
- India
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