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Peng XH, Chen S, Liu XF, Yang JY, Meng FZ, Cao H, Li DH, Hua HM. Identification and bioactivity evaluation of twelve previously undescribed depsidone derivatives from Garcinia oligantha. PHYTOCHEMISTRY 2024; 227:114227. [PMID: 39067628 DOI: 10.1016/j.phytochem.2024.114227] [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: 02/06/2024] [Revised: 07/22/2024] [Accepted: 07/25/2024] [Indexed: 07/30/2024]
Abstract
Phytochemical studies on the leaves and twigs of Garcinia oligantha Merr. led to the isolation of twelve previously undescribed depsidone derivatives (oliganthdepsidones A-L, 1-12). Their structures were elucidated by extensive spectroscopic analysis including 1H and 13C NMR, HSQC, HMBC and NOESY along with HRESIMS. The structures of oliganthdepsidones G and J were finally determined using DFT-NMR chemical shift calculations and DP4+ methods. Cytotoxicity test in four human cancer cell lines indicated that oliganthdepsidone F had relatively strong cytotoxic effect against A375 (melanoma), A549 (lung cancer), HepG2 (liver cancer), and MCF-7 (breast cancer) cell lines with IC50 of 18.71, 15.44, 10.92, and 15.90 μM, respectively. The dose- and time-dependent antiproliferative effects of oliganthdepsidone F on these cell lines were also observed by CCK-8 test. As determined by fluorescent microscopy and flow cytometry in these cell lines, oliganthdepsidone F could promote cell apoptosis, leading to the inhibition of cell proliferation. The results of wound healing assay and transwell assay showed that oliganthdepsidone F could inhibit the migration and invasion of A549 and MCF-7 cell lines in a concentration-dependent manner.
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Affiliation(s)
- Xiao-Hui Peng
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Sha Chen
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Xiao-Fan Liu
- School of Life Science and Bio-Pharmaceutics, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Jin-Yuan Yang
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Fan-Zhu Meng
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Hao Cao
- School of Life Science and Bio-Pharmaceutics, Shenyang Pharmaceutical University, Shenyang, 110016, China.
| | - Da-Hong Li
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China.
| | - Hui-Ming Hua
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China.
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Duong TH, An TNM, Le TKD, Tran TMD, Nguyen HT, Nguyen THA, Nguyen NH, Sichaem J. Parmoferone A, a new depsidone from the lichen Parmotrema cristiferum. Nat Prod Res 2024; 38:2603-2608. [PMID: 36999530 DOI: 10.1080/14786419.2023.2193746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 03/16/2023] [Indexed: 04/01/2023]
Abstract
A new depsidone, parmoferone A (1), together with three known compounds, parmosidone K (2), albifolione (3), and 4-chloroorcinol (4) were isolated from the lichen Parmotrema cristiferum (Taylor) Hale (Parmeliaceae). The structures of isolated compounds were identified from its spectroscopic data and by comparison with the literature. Compounds 1-4 were evaluated for alpha-glucosidase inhibition. Compound 1 was determined to be a potent non-competitive inhibitor against alpha-glucosidase with an IC50 value of 18.1 μM.
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Affiliation(s)
- Thuc-Huy Duong
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Tran Nguyen Minh An
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thi-Kim-Dung Le
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Thi-Minh-Dinh Tran
- Department of Biology, University of Education, Ho Chi Minh City, Vietnam
| | - Huy Truong Nguyen
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | | | | | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, Thailand
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Bauri AK, Dionicio IC, Arellano ES, Jeyaraj JG, Foro S, Carcache de Blanco EJ. A New Rare Halogenated Depside from Lichen and Study of its Anti-Proliferative Activity. Chem Biodivers 2024; 21:e202301874. [PMID: 38488665 DOI: 10.1002/cbdv.202301874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 03/13/2024] [Indexed: 05/24/2024]
Abstract
Lichens are a symbiotic association of algae and fungus, belonging to the family Parmeliaceae. Some lichen species are edible and used as an active ingredient for preparation of exotic spices as well as folklore medicine to cure different kinds of ailments. A specimen of lichen was collected from Munner in the Kerala State of South India for chemical profiling. Chemical analyses of the diethyl ether extract of the defatted lichen led to the isolation of six phenols 1-6 with variation of relative abundance. Amongst them, the relative abundance of compound 3 was the greatest (1 % of crude extract) and it was identified as atranorin. The structures of known compounds were confirmed by comparison of their 1H-NMR, 13C NMR, and mass data with published values available in the literature. In vitro bioassay for anti-proliferative activity of these compounds has been conducted against various human cancer cell lines in comparison with paclitaxel as control using SRB assay. Interestingly, a new compound 5 was found along with previously reported compounds from this lichen. This new compound was designated as fluoroatranorin 5 which was reported for the first time herein. The structural characterization of a new depside was determined by spectral methods such as 1H-NMR, 13C NMR, 19F NMR, IR, LC-HRESI-MS, and LC-MS/MS study. Its structure was confirmed by single crystal X-ray diffraction study. This new compound was designated as fluoroatranorin 5 which was reported first time herein. Anti-proliferative activity of all these compounds was evaluated against six different cancer cell lines. The inhibitory activity, IC50 value of compounds 1-3 and 5 exhibited at 99.64, 102.04, 109.20, 53.0 and 2.4 μM on cancer cell lines HT-29 (colon), Hela (cervical), HT-29, HPAC (pancreas) and A2780 (ovarian cancer cell line) respectively in comparison with paclitaxel as control. The new compound 5 exhibited significant activity with IC50 value 2.4 μM on A2780 ovarian cancer cell line.
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Affiliation(s)
- Ajoy K Bauri
- Bio-Organic Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | | | | | - Jonathan G Jeyaraj
- College of Pharmacy, The Ohio State University, Ohio, Columbus, OH-43210, USA
| | - Sabine Foro
- Institute of Materials Science, Darmstadt University of Technology, Alarich-Weiss-Strasse 2, D-64287, Darmstadt, Germany
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Phan HVT, Nguyen DV, Le TKD, Nguyen TAM, Dong PSN, Tran TN, Dao NVT, Nguyen HC, Luu HT, Chavasiri W, Hoang LTTT, Nguyen VK. Morusacerane: A new gammacerane triterpenoid from the trunk of Morus Alba linn. with α-glucosidase inhibitory activity. Nat Prod Res 2024:1-10. [PMID: 38600840 DOI: 10.1080/14786419.2024.2340043] [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: 01/07/2024] [Accepted: 03/29/2024] [Indexed: 04/12/2024]
Abstract
This phytochemistry investigation on the trunk of Morus alba L. resulted in the isolation of three triterpenoids, including a new gammacerane triterpenoid - morusacerane (1); along with two known compounds of betulinic acid (2) and ursolic acid (3). The structure elucidation was thoroughly conducted based on 1D, 2D-NMR and HRESIMS spectra, followed by a comparison with existing literatures. The evaluation on α-glucosidase inhibitory exhibited the great potential of the application of these isolated compounds in diabetes treatments. The results show that morusacerane (1), betulinic acid (2), and ursolic acid (3) demonstrate the strong inhibitory with the IC50 values of 106.1, 11.12, and 7.20 μM, respectively. All of these compounds interacted well with the allosteric site enzyme α-glucosidase MAL32 through H-bonds and hydrophobic interaction.
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Affiliation(s)
- Hoang-Vinh-Truong Phan
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Duy Vu Nguyen
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, Thailand
| | - Thi-Kim-Dung Le
- Laboratory of Biophysics, Institute for Advanced Study in Technology, Ton Duc Thang University, Ho Chi Minh City, Vietnam
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Thi-Anh-Minh Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang, Vietnam
- School of Engineering & Technology, Duy Tan University, Da Nang, Vietnam
| | - Phan-Si-Nguyen Dong
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Thanh-Nha Tran
- Department of Environmental Engineering, Thu Dau Mot University, Binh Duong, Vietnam
| | - Ngoc-Van-Trang Dao
- Institute of Research and Development, Duy Tan University, Da Nang, Vietnam
- School of Engineering & Technology, Duy Tan University, Da Nang, Vietnam
| | - Hieu Cuong Nguyen
- Southern Institute of Ecology, Institute of Applied Materials Science and Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Hong Truong Luu
- Southern Institute of Ecology, Institute of Applied Materials Science and Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, Thailand
| | - Le-Thuy-Thuy-Trang Hoang
- Laboratory of Advanced Materials Chemistry, Institute for Advanced Study in Technology, Ton Duc Thang University, Ho Chi Minh City, Vietnam
- Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Van-Kieu Nguyen
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
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Tran TMD, Aonbangkhen C, Duong TH, Nguyen THM, Ho MTT, Chavasiri W, Wongsuwan S, Chatwichien J, Giao Vo TP, Nguyen NH, Kiriwan D, Choowongkomon K. Diphenyl ethers from the cultured lichen mycobiont of Graphis handelii Zahlbr. Heliyon 2024; 10:e25763. [PMID: 38404884 PMCID: PMC10884431 DOI: 10.1016/j.heliyon.2024.e25763] [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: 11/19/2023] [Revised: 02/01/2024] [Accepted: 02/01/2024] [Indexed: 02/27/2024] Open
Abstract
Purpose Cultured lichen mycobionts are valuable sources of new natural compounds. Mycobiont of Graphis handelii growing in Vietnam was isolated, cultivated and chemically investigated. The crude extract of this cultured mycobiont showed potent alpha-glucosidase inhibition with an IC50 value of 50 μg/mL. Methods Multiple chromatographic methods were applied to the extract to isolate compounds. The combination of Nuclear Magnetic Resonance analysis and high-resolution mass spectroscopy determined their chemical structures. Electrophilic bromination/chlorination was applied to obtain new derivatives using NaBr/H2O2 and NaCl/H2O2 reagents. Compounds were evaluated for enzyme inhibitory activities, including alpha-glucosidase inhibition, HIV-1 reverse transcriptase inhibition, SARS-CoV-2 main protease (Mpro) inhibition, anti-inflammatory activity, and cytotoxicity against several cancer cell lines. A molecular docking study for anti-SARS-CoV-2 was conducted to understand the inhibitory mechanism. Results A new diphenyl ether, handelone (1) and a known compound xylarinic acid A (2) were isolated and elucidated. Four synthetic products 6'-bromohandelone (1a), 2'-bromohandelone (1b), 2',6'-dibromohandelone (1c), and 2',6'-dichlorohandelone (1d) were prepared. Compound 1 showed good activity against Mpro with an IC50 value of 5.2 μM but it showed weak or inactive activity in other tests. Other compounds were inactive in all assays. Conclusion A new compound, handelone (1) was isolated from the cultured mycobiont of Graphis handelii. From these compounds, four new derivatives were prepared. Compound 1 showed good activity against Mpro with an IC50 value of 5.2 μM but it showed weak or inactive activity in other tests. Other compounds were inactive in all assays.
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Affiliation(s)
- 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, 748342, Viet Nam
- KU Institute for Advanced Studies, Kasetsart University, Bangkok, 10900, Thailand
| | - Chanat Aonbangkhen
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, 280 an Duong Vuong Street, District 5, Ho Chi Minh City, 748342, Viet Nam
| | - Thu-Hoang-Mai Nguyen
- Department of Chemistry, Ho Chi Minh City University of Education, 280 an Duong Vuong Street, District 5, Ho Chi Minh City, 748342, Viet Nam
| | - Minh-Truong-Tho Ho
- Department of Chemistry, Ho Chi Minh City University of Education, 280 an Duong Vuong Street, District 5, Ho Chi Minh City, 748342, Viet Nam
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand
- Nanotec-CU Center of Excellence on Food and Agriculture, Department of Chemistry, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Sutthida Wongsuwan
- Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Bangkok, 10210, Thailand
| | - Jaruwan Chatwichien
- Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Bangkok, 10210, Thailand
| | - Thi-Phi Giao Vo
- University of Science, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Viet Nam
| | - Ngoc-Hong Nguyen
- CirTech Institute, HUTECH University, 475 A Dien Bien Phu Street, Binh Thanh District, Ho Chi Minh City, Viet Nam
| | | | - Kiattawee Choowongkomon
- KU Institute for Advanced Studies, Kasetsart University, Bangkok, 10900, Thailand
- Department of Biochemistry, Kasetsart University, Bangkok, Thailand
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Hoang LTTT, Phan HVT, Nguyen-Si HV, Tran TN, Vo TPG, Le HTT, Dao NVT, Huynh TMS, Mai DT, Dong PSN, Nguyen VK. Tinctoric acid A-B, two new hopan-type triterpenoids from the Vietnamese lichen, Parmotrema tinctorum (Despr. ex Nyl.) hale with α-glucosidase inhibitory activity. Nat Prod Res 2024:1-8. [PMID: 38258412 DOI: 10.1080/14786419.2024.2305659] [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: 12/09/2023] [Accepted: 01/09/2024] [Indexed: 01/24/2024]
Abstract
Two new hopan-type triterpenoids, namely tinctoric acid A-B (1-2), were isolated from the lichen Parmotrema tinctorum (Despr. ex Nyl.) Hale. Their structures were elucidated by extensive spectroscopic analyses (1D and 2D NMR). The absolute configuration at C-22 of 1 was established through DP4 probability. Compounds 1-2 were evaluated for their inhibitory activity against α-glucosidase and found to be more potent than those of positive control (acarbose, IC50 168 µM) with values IC50 74.7 and 98.2 µM, respectively. Both of these compounds interacted well with enzyme α-glucosidase MAL32 through H-bonds and hydrophobic interaction.
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Affiliation(s)
- Le-Thuy-Thuy-Trang Hoang
- Laboratory of Advanced Materials Chemistry, Institute for Advanced Study in Technology, Ton Duc Thang University, Ho Chi Minh City, Vietnam
- Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Hoang-Vinh-Truong Phan
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Hoai-Vu Nguyen-Si
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Thanh-Nha Tran
- Department of Environmental Engineering, Thu Dau Mot University, Binh Duong, Vietnam
| | - Thi-Phi-Giao Vo
- Department of Ecology-Evolutionary Biology, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Thu Duc City, Vietnam
| | - Huong Thi Thu Le
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Ngoc-Van-Trang Dao
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Thi-Minh-Suong Huynh
- University of Natural Resources and Environment Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Dinh-Tri Mai
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi, Vietnam
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Phan-Si-Nguyen Dong
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Van-Kieu Nguyen
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
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Torres-Benítez A, Ortega-Valencia JE, Jara-Pinuer N, Sanchez M, Vargas-Arana G, Gómez-Serranillos MP, Simirgiotis MJ. Antioxidant and antidiabetic activity and phytoconstituents of lichen extracts with temperate and polar distribution. Front Pharmacol 2023; 14:1251856. [PMID: 38026927 PMCID: PMC10646315 DOI: 10.3389/fphar.2023.1251856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 10/03/2023] [Indexed: 12/01/2023] Open
Abstract
The objective of this research was to characterize the chemical composition of ethanolic extracts of the lichen species Placopsis contortuplicata, Ochrolechia frigida, and Umbilicaria antarctica, their antioxidant activity, and enzymatic inhibition through in vitro and molecular docking analysis. In total phenol content, FRAP, ORAC, and DPPH assays, the extracts showed significant antioxidant activity, and in in vitro assays for the inhibition of pancreatic lipase, α-glucosidase, and α-amylase enzymes, together with in silico studies for the prediction of pharmacokinetic properties, toxicity risks, and intermolecular interactions of compounds, the extracts evidenced inhibitory potential. A total of 13 compounds were identified by UHPLC-ESI-QTOF-MS in P. contortuplicata, 18 compounds in O. frigida, and 12 compounds in U. antarctica. This study contributes to the knowledge of the pool of bioactive compounds present in lichens of temperate and polar distribution and biological characteristics that increase interest in the discovery of natural products that offer alternatives for treatment studies of diseases related to oxidative stress and metabolic syndrome.
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Affiliation(s)
- Alfredo Torres-Benítez
- Instituto de Farmacia, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | | | - Nicolás Jara-Pinuer
- Instituto de Farmacia, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Marta Sanchez
- Departamento de Farmacología, Farmacognosia y Botánica, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid, Spain
| | - Gabriel Vargas-Arana
- Laboratorio de Química de Productos Naturales, Instituto de Investigaciones de la Amazonía Peruana, Avenue Abelardo Quiñones, Iquitos, Peru
- Facultad de Industrias Alimentarias, Universidad Nacional de la Amazonía Peruana, Iquitos, Peru
| | - María Pilar Gómez-Serranillos
- Departamento de Farmacología, Farmacognosia y Botánica, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid, Spain
| | - Mario J. Simirgiotis
- Instituto de Farmacia, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
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Khayat MT, Ghazawi KF, Samman WA, Alhaddad AA, Mohamed GA, Ibrahim SRM. Recent advances on natural depsidones: sources, biosynthesis, structure-activity relationship, and bioactivities. PeerJ 2023; 11:e15394. [PMID: 37197584 PMCID: PMC10184659 DOI: 10.7717/peerj.15394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 04/20/2023] [Indexed: 05/19/2023] Open
Abstract
Depsidones are a class of polyphenolic polyketides that have been proposed to be biosynthesized from oxidative coupling of esters of two polyketidic benzoic acid derivatives. They are principally encountered in fungi and lichens. In addition to their diversified structural features, they revealed varied bioactivities such as antimicrobial, antimalarial, cytotoxic, anti-inflammatory, anti-Helicobacter pylori, antimycobacterial, antihypertensive, anti-diarrheal, antidiabetic, phytotoxic, anti-HIV, anti-osteoclastogenic, and butyrylcholinesterase, tyrosinase, hyaluronidase, and acetylcholinesterase inhibition. The current work was targeted to provide an overview on the naturally reported depsidones from various sources in the period from 2018 to the end of 2022 including their structures, biosynthesis, sources, and bioactivities, as well as the reported structure-activity relationship and semisynthetic derivatives. A total of 172 metabolites with 87 references were reviewed. The reported findings unambiguously demonstrated that these derivatives could be promising leads for therapeutic agents. However, further in-vivo evaluation of their potential biological properties and mechanistic investigations are needed.
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Affiliation(s)
- Maan T. Khayat
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Kholoud F. Ghazawi
- Clinical Pharmacy Department, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Waad A. Samman
- Department of Pharmacology and Toxicology, College of Pharmacy, Taibah University, Al-Madinah Al-Munawwarah, Saudi Arabia
| | - Aisha A. Alhaddad
- Department of Pharmacology and Toxicology, College of Pharmacy, Taibah University, Al-Madinah Al-Munawwarah, Saudi Arabia
| | - Gamal A. Mohamed
- Department of Natural Products and Alternative Medicine, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sabrin RM Ibrahim
- Department of Pharmacognosy, Faculty of Pharmacy, Assiut University, Assiut, Egypt
- Department of Chemistry, Batterjee Medical College, Jeddah, Saudi Arabia
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9
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Nguyen TQT, Pham NKT, Trung NT, An NT, Mai DT, Sichaem J, Huynh BLC, Anh NTH, Nguyen NH, Duong TH. Indicuen, a new hopane from Parmotrema indicum Hale growing in Vietnam. Nat Prod Res 2023; 37:1284-1291. [PMID: 34758682 DOI: 10.1080/14786419.2021.2003355] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
One new hopane-type triterpene, indicuen (1), along with eight known compounds (2-9) were isolated from the n-hexane extract of the lichen Parmotrema indicum Hale. The chemical structures of isolated compounds were identified by interpretation of their spectroscopic data (1D, 2D NMR and HRESIMS) combined with DFT-NMR chemical shift calculations and subsequent assignment of DP4+ probabilities and by comparison with the literature. Indicuen represents for a rare hopane bearing a 1-carboxyethyl substituent at C-21 in lichens. Compounds 1-3 and 5-8 were evaluated for α-glucosidase inhibition and cytotoxicity against K562 and HepG2 cancer cell lines. Compounds 1, 5 and 7 exhibited moderate α-glucosidase inhibition with IC50 values of 201.1, 156.3 and 187.4 µM, respectively. Compound 1 also showed weak cytotoxicity toward K562 cell line while others showed no activity.
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Affiliation(s)
| | | | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Quy Nhon, Vietnam
| | - Nguyen Truong An
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Quy Nhon, Vietnam
| | - Dinh-Tri Mai
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi, Vietnam
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, Thailand
| | | | - Nguyen Thi Hong Anh
- Ho Chi Minh City University of Food Industry, 140 Le Trong Tan Street, Tay Thanh Ward, Tan Phu District, HCMC, Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
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10
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Nguyen NH, Tran NMA, Duong TH, Vo GV. α-Glucosidase inhibitory activities of flavonoid derivatives isolated from Bouea macrophylla: in vitro and in silico studies. RSC Adv 2023; 13:8190-8201. [PMID: 36922943 PMCID: PMC10009879 DOI: 10.1039/d3ra00650f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 02/24/2023] [Indexed: 03/14/2023] Open
Abstract
In continuation of our search for bioactive compounds from the Bouea macrophylla (B. macrophylla) plant, we describe herein eight flavonoid-type compounds including mearsetin (1), mearnsitrin (2), kampferol (3), afzelin (4), quercetin (5), quercitrin (6), myricitin (7), and naringenin (8) with the aim of investigating their antidiabetic properties. Compounds 3 and 5 were selected for aromatic bromination to provide two new products 3a and 5a, respectively. All compounds showed promising α-glucosidase inhibition, with IC50 values ranging from 9.2 to 266 μM apart from compound (2). Remarkably, compound 5a, 8-bromoquercetin, showed the highest inhibition activity, and it was thirty-seven times better than the standard drug acarbose. Pose 261/compound 5a interacted well with enzyme 3TOPin silico docking, and the complex of pose 261 and target enzyme proved its stability in MD. Compound 5a, pose 261 was predicted to be safe and seemed to have good absorption, distribution, metabolism, and excretion properties as assessed via the ADMET model in silico. Our findings revealed the α-glucosidase inhibitory potential of the flavonoids isolated from the leaves of B. macrophylla with a predictive pharmacokinetics profile, which may be helpful in their development as potential drugs.
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Affiliation(s)
- Ngoc-Hong Nguyen
- CirTech Institute, HUTECH University 475 A Dien Bien Phu Street, Binh Thanh District Ho Chi Minh City Vietnam
| | - Nguyen-Minh-An Tran
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City 12 Nguyen Van Bao Street, Ward 4, Go Vap District Ho Chi Minh City 70000 Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education Ho Chi Minh City 700000 Vietnam
| | - Giau Van Vo
- Department of Biomedical Engineering, School of Medicine, Vietnam National University - Ho Chi Minh City (VNU-HCM) Ho Chi Minh City 700000 Vietnam
- Research Center for Genetics and Reproductive Health (CGRH), School of Medicine, Vietnam National University - Ho Chi Minh City (VNU-HCM) Ho Chi Minh City 70000 Vietnam
- Vietnam National University Ho Chi Minh City (VNU-HCM) Ho Chi Minh City 700000 Vietnam
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11
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Do TH, Duong TH, Nguyen Minh An T, Vo TPG, Do VM, Nguyen NH, Sichaem J. Two New α-Glucosidase Inhibitory Depsidones from the Lichen Parmotrema cristiferum (Taylor) Hale. Chem Biodivers 2023; 20:e202201213. [PMID: 36775801 DOI: 10.1002/cbdv.202201213] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/17/2023] [Accepted: 02/10/2023] [Indexed: 02/14/2023]
Abstract
A bioactivity-guided investigation of the lichen Parmotrema cristiferum (Taylor) Hale (Parmeliaceae) led to the isolation of two new depsidones, cristifones A and B (1 and 2). The structures of the isolated compounds were identified by spectroscopic methods and comparison with the literature data. Compound 1 showed the initial combined structures of depsidone and depside cores. The two isolated compounds were then evaluated for α-glucosidase inhibition. Compounds 1 and 2 were confirmed as potent, with IC50 values of 21.5 and 18.4 μM, respectively. Compound 2 was a non-competitive inhibitor against α-glucosidase, as indicated by the intersect in the second quadrant of each respective plot.
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Affiliation(s)
- Thanh-Hung Do
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, 754000, 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
| | - Tran Nguyen Minh An
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City, 727000, Vietnam
| | - Thi-Phi-Giao Vo
- Faculty of Biology, University of Science, Vietnam National University Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
| | - Van-Mai Do
- Nam Can Tho University, Nam Can Tho University, , Can Tho City, 900000, Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, HUTECH University, 475 A Dien Bien Phu Street, Binh Thanh District, Ho Chi Minh City, 717000, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, 52190, Thailand
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12
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Lichen-Derived Diffractaic Acid Inhibited Dengue Virus Replication in a Cell-Based System. Molecules 2023; 28:molecules28030974. [PMID: 36770642 PMCID: PMC9918999 DOI: 10.3390/molecules28030974] [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: 12/12/2022] [Revised: 01/06/2023] [Accepted: 01/13/2023] [Indexed: 01/21/2023] Open
Abstract
Dengue is a mosquito-borne flavivirus that causes 21,000 deaths annually. Depsides and depsidones of lichens have previously been reported to be antimicrobials. In this study, our objective was to identify lichen-derived depsides and depsidones as dengue virus inhibitors. The 18 depsides and depsidones of Usnea baileyi, Usnea aciculifera, Parmotrema dilatatum, and Parmotrema tsavoense were tested against dengue virus serotype 2. Two depsides and one depsidone inhibited dengue virus serotype 2 without any apparent cytotoxicity. Diffractaic acid, barbatic acid, and Parmosidone C were three active compounds further characterized for their efficacies (EC50), cytotoxicities (CC50), and selectivity index (SI; CC50/EC50). Their EC50 (SI) values were 2.43 ± 0.19 (20.59), 0.91 ± 0.15 (13.33), and 17.42 ± 3.21 (8.95) μM, respectively. Diffractaic acid showed the highest selectivity index, and similar efficacies were also found in dengue serotypes 1-4, Zika, and chikungunya viruses. Cell-based studies revealed that the target was mainly in the late stage with replication and the formation of infectious particles. This report highlights that a lichen-derived diffractaic acid could become a mosquito-borne antiviral lead as its selectivity indices ranged from 8.07 to 20.59 with a proposed target at viral replication.
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13
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UHPLC-MS Chemical Fingerprinting and Antioxidant, Enzyme Inhibition, Anti-Inflammatory In Silico and Cytoprotective Activities of Cladonia chlorophaea and C. gracilis (Cladoniaceae) from Antarctica. Antioxidants (Basel) 2022; 12:antiox12010010. [PMID: 36670872 PMCID: PMC9854829 DOI: 10.3390/antiox12010010] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022] Open
Abstract
The lichen species Cladonia chlorophaea and C. gracilis (Cladoniaceae) are widely distributed in the island archipelago of maritime Antarctica and represent a natural resource of scientific interest. In this work, the metabolomic characterization of the ethanolic extracts of these species and the determination of the antioxidant activity, enzymatic inhibition and anti-inflammatory potential of selected compounds on the 5-lipoxygenase enzyme by molecular docking and cytoprotective activity in the SH-SY5Y cell line were carried out. Nineteen compounds were identified by liquid chromatography coupled with quadrupole-time-of-flight mass spectrometry (UHPLC-ESI-QTOF-MS) in each of the species. The contents of phenolic compounds, antioxidant activity, the inhibition of cholinesterases (acetylcholinesterase and butyrylcholinesterase) and digestive enzymes (α-glucosidase and pancreatic lipase) were variable among species, with better results in C. chlorophaea. Molecular docking evidenced significant binding affinities of some compounds for the 5-lipoxygenase enzyme, together with outstanding pharmacokinetic properties. Both extracts were shown to promote cell viability and a reduction in reactive oxygen species production in an H2O2-induced oxidative stress model. This study contributes to the chemical knowledge of the Cladonia species and demonstrates the biological potential for the prevention and promising treatment of central nervous system pathologies, inflammatory disorders and metabolic alterations.
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14
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Secondary Metabolites of the Lichen Parmotrema cristiferum. Chem Nat Compd 2022. [DOI: 10.1007/s10600-022-03817-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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15
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Nguyen HH, Duong TH, Nguyen TVA, Do TH, Pham DD, Nguyen NH, Nguyen HT. α-Glucosidase inhibitory derivatives of protocetraric acid. Nat Prod Res 2022; 37:1935-1946. [DOI: 10.1080/14786419.2022.2110093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Huu-Hung Nguyen
- Faculty of Applied Technology, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Viet Nam
| | | | - Thanh-Hung Do
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
| | - Duc-Dung Pham
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Viet Nam
| | | | - Huy Truong Nguyen
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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16
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Do TH, Duong TH, Nguyen HT, Nguyen TH, Sichaem J, Nguyen CH, Nguyen HH, Long NP. Biological Activities of Lichen-Derived Monoaromatic Compounds. Molecules 2022; 27:molecules27092871. [PMID: 35566220 PMCID: PMC9105517 DOI: 10.3390/molecules27092871] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 04/26/2022] [Accepted: 04/28/2022] [Indexed: 02/05/2023] Open
Abstract
Lichen-derived monoaromatic compounds are bioactive compounds, associated with various pharmacological properties: antioxidant, antifungal, antiviral, cytotoxicity, and enzyme inhibition. However, little is known about data regarding alpha-glucosidase inhibition and antimicrobial activity. Very few compounds were reported to have these activities. In this paper, a series of monoaromatic compounds from a lichen source were isolated and structurally elucidated. They are 3,5-dihydroxybenzoic acid (1), 3,5-dihydroxybenzoate methyl (2), 3,5-dihydroxy-4-methylbenzoic acid (3), 3,5-dihydroxy-4-methoxylbenzoic acid (4), 3-hydroxyorcinol (5), atranol (6), and methyl hematommate (7). To obtain more derivatives, available compounds from the previous reports such as methyl β-orsellinate (8), methyl orsellinate (9), and D-montagnetol (10) were selected for bromination. Electrophilic bromination was applied to 8–10 using NaBr/H2O2 reagents to yield products methyl 5-bromo-β-orsellinate (8a), methyl 3,5-dibromo-orsellinate (9a), 3-bromo-D-montagnetol (10a), and 3,5-dibromo-D-montagnetol (10b). Compounds were evaluated for alpha-glucosidase inhibition and antimicrobial activity against antibiotic-resistant, pathogenic bacteria Enterococcus faecium, Staphylococcus aureus, and Acinetobacter baumannii. Compound 4 showed stronger alpha-glucosidase inhibition than others with an IC50 value of 24.0 µg/mL. Synthetic compound 9a exhibited remarkable activity against Staphylococcus aureus with a MIC value of 4 µg/mL. Molecular docking studies were performed to confirm the consistency between in vitro and in silico studies.
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Affiliation(s)
- Thanh-Hung Do
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Vietnam;
| | - Thuc-Huy Duong
- Department of Chemistry, University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City 700000, Vietnam;
- Correspondence: (T.-H.D.); (N.P.L.); Tel.: +84-91-901-1884 (T.-H.D.); +82-51-890-5907 (N.P.L.)
| | - Huy Truong Nguyen
- Application in Pharmaceutical Sciences Research Group, Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam;
| | - Thi-Hien Nguyen
- Department of Chemistry, University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City 700000, Vietnam;
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang 52190, Thailand;
| | - Chuong Hoang Nguyen
- University of Science, Vietnam National University Ho Chi Minh City, Ho Chi Minh City 700000, Vietnam;
| | - Huu-Hung Nguyen
- Faculty of Applied Technology, School of Engineering and Technology, Van Lang University, Ho Chi Minh City 700000, Vietnam;
| | - Nguyen Phuoc Long
- Department of Pharmacology and PharmacoGenomics Research Center, Inje University College of Medicine, Busan 614-735, Korea
- Correspondence: (T.-H.D.); (N.P.L.); Tel.: +84-91-901-1884 (T.-H.D.); +82-51-890-5907 (N.P.L.)
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17
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Zhang Y, Li Z, Huang B, Liu K, Peng S, Liu X, Gao C, Liu Y, Tan Y, Luo X. Anti-Osteoclastogenic and Antibacterial Effects of Chlorinated Polyketides from the Beibu Gulf Coral-Derived Fungus Aspergillus unguis GXIMD 02505. Mar Drugs 2022; 20:178. [PMID: 35323477 PMCID: PMC8956104 DOI: 10.3390/md20030178] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/21/2022] [Accepted: 02/25/2022] [Indexed: 02/07/2023] Open
Abstract
One new depsidone derivative, aspergillusidone H (3), along with seven known biosynthetically related chlorinated polyketides, were obtained from the Beibu Gulf coral-derived fungus Aspergillus unguis GXIMD 02505. Their structures were determined by comprehensive physicochemical and spectroscopic data interpretation. Notably, the X-ray crystal structure of 2 and the previously unknown absolute configuration of 8, assigned by ECD calculations, are described here for the first time. Compounds 1-5, 7 and 8 exhibited inhibition of lipopolysaccharide (LPS)-induced NF-κB in RAW 264.7 macrophages at 20 μM. In addition, the two potent inhibitors (2 and 7) dose-dependently suppressed RANKL-induced osteoclast differentiation without any evidence of cytotoxicity in bone marrow macrophages cells (BMMs). This is the first report of osteoclastogenesis inhibitory activity for the metabolites of these kinds. Besides, compounds 1, 2, 4, and 6-8 showed inhibitory activity against marine biofilm-forming bacteria, methicillin-resistant Staphylococcus aureus, Microbulbifer variabilis, Marinobacterium jannaschii, and Vibrio pelagius, with their MIC values ranging from 2 to 64 μg/mL. These findings provide a basis for further development of chlorinated polyketides as potential inhibitors of osteoclast differentiation and/or for use as anti-fouling agents.
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Affiliation(s)
- Yanting Zhang
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Y.Z.); (B.H.); (K.L.); (S.P.); (X.L.); (C.G.)
| | - Zhichao Li
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China;
| | - Bingyao Huang
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Y.Z.); (B.H.); (K.L.); (S.P.); (X.L.); (C.G.)
| | - Kai Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Y.Z.); (B.H.); (K.L.); (S.P.); (X.L.); (C.G.)
| | - Shuai Peng
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Y.Z.); (B.H.); (K.L.); (S.P.); (X.L.); (C.G.)
| | - Xinming Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Y.Z.); (B.H.); (K.L.); (S.P.); (X.L.); (C.G.)
| | - Chenghai Gao
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Y.Z.); (B.H.); (K.L.); (S.P.); (X.L.); (C.G.)
| | - Yonghong Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Y.Z.); (B.H.); (K.L.); (S.P.); (X.L.); (C.G.)
| | - Yanhui Tan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China;
| | - Xiaowei Luo
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (Y.Z.); (B.H.); (K.L.); (S.P.); (X.L.); (C.G.)
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18
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Ha KN, Nguyen TVA, Mai DT, Tran NMA, Nguyen NH, Vo GV, Duong TH, Truong Nguyen H. Alpha-glucosidase inhibitors from Nervilia concolor, Tecoma stans, and Bouea macrophylla. Saudi J Biol Sci 2022; 29:1029-1042. [PMID: 35197772 PMCID: PMC8848031 DOI: 10.1016/j.sjbs.2021.09.070] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 09/18/2021] [Accepted: 09/25/2021] [Indexed: 12/18/2022] Open
Abstract
Tecoma stans (L.) Juss. Ex Kunth is widely used in folk medicine. In ethnomedicine, it is applied as a cardioprotective, hepatoprotective, antiarthritic, antinociceptive, anti-inflammatory, and antimicrobial. The aqueous extract is considered antidiabetic, and is used as a traditional remedy in Mexico. More than 120 chemical constituents have been identified in its leaves, barks, and roots. However, less is known about the phytochemical properties of T. stans flower extracts. The herbal plant Nervilia concolor (Blume) Schltr. is native to Vietnam, and is used in traditional Chinese medicine to treat diseases such as bronchitis, stomatitis, acute pneumonia, and laryngitis. Only two previous reports have addressed the chemical content of this plant. Bouea macrophylla Griff., commonly known as marian plum or plum mango, is a tropical plant that is used to treat a range of illnesses. Phytochemical analysis of B. macrophylla suggests the presence of volatile components and flavonoids. However, existing data have been obtained from screening without isolation. As part of our ongoing search for alpha-glucosidase inhibitors from Vietnamese medicinal plants, we conducted bioactive-guided isolation of the whole plant N. concolor, the flowers of T. stans, and the leaves of B. macrophylla. We isolated and structurally elucidated five known compounds from T. stans: ursolic acid (TS1), 3-oxours-12-en-28-oic acid (TS2), chrysoeriol (TS3), ferulic acid (TS4), and tecomine (TS5). Three known compounds were isolated from Nervilia concolor: astragalin (NC1), isoquercitrin (NC2), and caffeic acid (NC3). From B. macrophylla, betullinic acid (BM1), methyl gallate (BM2), and 3-O-galloyl gallic acid methyl ester (BM3) were isolated. All compounds showed promising alpha-glucosidase inhibition, with IC50 values ranging from 1.4 to 143.3 µM. The kinetics of enzyme inhibition showed BM3 to be a competitive-type inhibitor. An in silico molecular docking model confirmed that compounds NC1, NC2, and BM3 were potential inhibitors of the α-glucosidase enzyme. Molecular dynamics simulations were carried out with compound BM3 demonstrating the best docking model during simulation up to 100 ns to explore the stability of the complex ligand–protein.
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Affiliation(s)
- Kim-Ngoc Ha
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), 475 A Dien Bien Phu Street, Binh Thanh District, Ho Chi Minh City 700000, Viet Nam
| | - Tran-Van-Anh Nguyen
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City 700000, Viet Nam
| | - Dinh-Tri Mai
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 11355, Viet Nam
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, 01 Mac Dinh Chi, Ho Chi Minh City 71007, Viet Nam
| | - Nguyen-Minh-An Tran
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City 71420, Viet Nam
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), 475 A Dien Bien Phu Street, Binh Thanh District, Ho Chi Minh City 700000, Viet Nam
| | - Giau Van Vo
- Department of Biomedical Engineering, School of Medicine, Vietnam National University – Ho Chi Minh City (VNU-HCM), Ho Chi Minh City, Viet Nam
- Vietnam National University – Ho Chi Minh City (VNU-HCM), Ho Chi Minh City 700000, Viet Nam
| | - Thuc-Huy Duong
- Department of Chemistry, University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City 72711, Viet Nam
- Corresponding authors at: Department of Chemistry, Ho Chi Minh City University of Education, 280 An Duong Vuong Street, District 5, 748342 Ho Chi Minh City, Viet Nam (T.-H. Duong). Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City 700000, Viet Nam (H. T. Nguyen).
| | - Huy Truong Nguyen
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City 700000, Viet Nam
- Corresponding authors at: Department of Chemistry, Ho Chi Minh City University of Education, 280 An Duong Vuong Street, District 5, 748342 Ho Chi Minh City, Viet Nam (T.-H. Duong). Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City 700000, Viet Nam (H. T. Nguyen).
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19
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Nguyen VK, Nguyen-Si HV, Devi AP, Poonsukkho P, Sangvichien E, Tran TN, Yusuke H, Mitsunaga T, Chavasiri W. Eumitrins F-H: three new xanthone dimers from the lichen Usnea baileyi and their biological activities. Nat Prod Res 2022; 37:1480-1490. [PMID: 34984944 DOI: 10.1080/14786419.2021.2023143] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The lichen Usnea baileyi is a fruticose lichen belonging to the Usnea genus. It is well known as a rich source of natural xanthone dimers and possesses various bioactivities. Nevertheless, the chemical investigation on this type of lichen is still rare as most of researches reported its components without structural elucidation. Herein, in the continuous study on this type of lichen, we further isolate xanthone dimers from the dichloromethane extract and explore three new xanthone dimers, eumitrins F - H (1 - 3). Their structures were elucidated unambiguously by spectroscopic analyses, including high resolution electrospray ionisation mass spectrometry (HRESIMS), 1 D and 2 D nuclear magnetic resonance spectroscopy (1 D and 2 D NMR), and DP4 probability. All compounds were evaluated for their enzyme inhibition against α-glucosidase, tyrosinase, and antibacterial activity. They revealed moderate antimicrobial and weak tyrosinase inhibition. For α-glucosidase inhibition, compound 3 displayed the most significant inhibitory against α-glucosidase possessing an IC50 value of 64.2 µM.
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Affiliation(s)
- Van-Kieu Nguyen
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam.,Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Hoai-Vu Nguyen-Si
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam.,Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Asshaima Paramita Devi
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, Thailand.,Program of Biotecnology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Pakarapon Poonsukkho
- Lichen Research Unit and Lichen Herbarium, Department of Biology, Faculty of Science, Ramkhamhaeng University, Bangkok, Thailand
| | - Ek Sangvichien
- Lichen Research Unit and Lichen Herbarium, Department of Biology, Faculty of Science, Ramkhamhaeng University, Bangkok, Thailand
| | - Thanh-Nha Tran
- Department of Enviromental Engineering, Thu Dau Mot University, Binh Duong, Vietnam
| | - Hioki Yusuke
- Graduate School of Natural Science and Technology, Gifu University, Gifu, Japan
| | - Tohru Mitsunaga
- Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, Thailand
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21
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Nguyen NH, Pham DD, Le TTV, Nguyen TAT, Huynh DL, Duong TH, Sichaem J. Synthesis and α-Glucosidase Inhibitory Activity of Ursolic Acid, Lupeol, and Betulinic Acid Derivatives. Chem Nat Compd 2021. [DOI: 10.1007/s10600-021-03545-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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22
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Tran CL, Tri MD, Tien-Trung N, Phan NM, Phan CTD, Tran TN, Do TH, Tran NMA, Tran TNM, Duong TH. Nervione, a new benzofuran derivative from Nervilia concolor. Nat Prod Res 2021; 36:5148-5154. [PMID: 33970720 DOI: 10.1080/14786419.2021.1920585] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A new benzofuran derivative, nervione (1), was isolated from Nervilia concolor (Blume) Schltr. (Orchidaceae). Eight previously reported compounds were also isolated: 5,7-dimethoxyflavone (2), 3,5,7-trimethoxyflavone (3), 7-methoxyflavone (4), 3,7-dimethoxy-5-hydroxyflavone (5), tetramethylscutellarein (4',5,6,7-tetramethoxyflavone) (6), 5,7-dimethoxy-4'-hydroxyflavone (7), rhamnetin (8), and 5,7-dihydroxy-3',4'-dimethoxyflavone (9). The structures were elucidated by 1D, 2D NMR, and HRESIMS spectroscopy in addition to the literature. The relative configuration of 1 was defined using DP4+ probability while its absolute configuration was defined by comparison of the ECD spectrum of 1 with those of previously reported compounds. All isolated compounds were evaluated for alpha-glucosidase inhibition, revealing weak or no activity.
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Affiliation(s)
- Cong-Luan Tran
- Faculty of Pharmacy and Nursery, Tay Do University, Can Tho, Vietnam
| | - Mai Dinh Tri
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Cau Giay, Ha noi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Nguyen Tien-Trung
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Vietnam
| | - Nhat-Minh Phan
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Cau Giay, Ha noi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Cam-Tu D Phan
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University, Vietnam
| | - Thanh-Nha Tran
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Thanh-Hung Do
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
| | - Nguyen-Minh-An Tran
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thi-Ngoc-Mai Tran
- Institute of Applied Sciences, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
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Dao TBN, Duong TH, Dao NVT, Vo HC, Pham NKT, Nguyen HT, Nguyen NH, Sichaem J. Berectones A and B: Two new rotenoids from the aerial parts of Boerhavia erecta. Nat Prod Res 2021; 36:5155-5160. [PMID: 33957820 DOI: 10.1080/14786419.2021.1920586] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Two previously unreported rotenoids, berectones A and B (1 and 2), along with four known compounds, 3,3',4'-tri-O-methylellagic acid (3), kaempferol (4), 7,4'-dihydroxy-8-methoxyisoflavone (5), and trans-N-caffeoyltyramine (6) were isolated from the aerial parts of Boerhavia erecta. The structures of all isolated compounds were fully characterized using spectroscopic data, as well as comparison with the previous literature. Compound 6 exhibited the strongest inhibitory activity toward α-glucosidase with IC50 value of 4.74 µM.
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Affiliation(s)
- Thi-Bich-Ngoc Dao
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Ngoc-Van-Trang Dao
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Huu-Canh Vo
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | | | - Huy Truong Nguyen
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, Thailand
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24
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Dao TBN, Nguyen TMT, Nguyen VQ, Tran TMD, Tran NMA, Nguyen CH, Nguyen THT, Nguyen HH, Sichaem J, Tran CL, Duong TH. Flavones from Combretum quadrangulare Growing in Vietnam and Their Alpha-Glucosidase Inhibitory Activity. Molecules 2021; 26:2531. [PMID: 33926133 PMCID: PMC8123651 DOI: 10.3390/molecules26092531] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 04/20/2021] [Accepted: 04/23/2021] [Indexed: 11/28/2022] Open
Abstract
Combretum quadrangulare Kurz is widely used in folk medicine in Eastern Asia and is associated with various ethnopharmacological properties including hepatoprotective, antipyretic, analgesic, antidysenteric, and anthelmintic activities. Previous phytochemical investigations reported the presence of numerous triterpenes (mostly cycloartanes, ursanes, lupanes, and oleananes) along with dozens of flavonoids. However, the extracts of C. quadrangulare and isolated flavonoids have not been evaluated for their alpha-glucosidase inhibition. In the frame of our efforts dedicated to the chemical investigation of Vietnamese medicinal plants and their biological activities, a phytochemical study of the MeOH extract of the leaves of C. quadrangulare using bioactive guided isolation was undertaken. In this paper, the isolation and structure elucidation of twelve known compounds, 5-hydroxy-3,7,4'-trimethoxyflavone (1), ayanin (2), kumatakenin (3), rhamnocitrin (4), ombuin (5), myricetin-3,7,3',5'-tetramethyl ether (6), gardenin D (7), luteolin (12), apigenin (13), mearnsetin (14), isoorientin (15), and vitexin (16) were reported. Bromination was applied to compounds 2 and 3 to provide four new synthetic analogues 8-11. All isolated and synthesized compounds were evaluated for alpha-glucosidase inhibition and antibacterial activity. Compounds 4 and 5 showed moderate antibacterial activity against methicillin-resistant Staphylococcus aureus while others were inactive. All compounds failed to reveal any activity toward extended spectrum beta-lactamase-producing Escherichia coli. Compounds 2, 4, 6-9, and 11-14 showed good alpha-glucosidase inhibition with IC50 values in the range of 30.5-282.0 µM. The kinetic of enzyme inhibition showed that 8 and 11 were noncompetitive type inhibition against alpha-glucosidase. In silico molecular docking model indicated that compounds 8 and 11 were potential inhibitors against enzyme α-glucosidase.
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Affiliation(s)
- Thi-Bich-Ngoc Dao
- Department of Chemistry, University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City 72711, Vietnam; (T.-B.-N.D.); (T.-M.-T.N.); (V.-Q.N.)
| | - Truong-Minh-Tri Nguyen
- Department of Chemistry, University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City 72711, Vietnam; (T.-B.-N.D.); (T.-M.-T.N.); (V.-Q.N.)
| | - Van-Quy Nguyen
- Department of Chemistry, University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City 72711, Vietnam; (T.-B.-N.D.); (T.-M.-T.N.); (V.-Q.N.)
| | - 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 72711, Vietnam;
| | | | - Chuong Hoang Nguyen
- University of Science, Vietnam National University, Ho Chi Minh City 72711, Vietnam;
| | - Thi-Hoai-Thu Nguyen
- Faculty of Basic Sciences, University of Medicine and Pharmacy at Ho Chi Minh City, 217 Hong Bang Street, District 5, Ho Chi Minh City 72714, Vietnam;
| | - Huu-Hung Nguyen
- Faculty of Technology, Van Lang University, 45 Nguyen Khac Nhu, District 1, Ho Chi Minh City 71013, Vietnam;
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang 52190, Thailand;
| | - Cong-Luan Tran
- Faculty of Pharmacy and Nursery, Tay Do University, Can Tho 94000, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City 72711, Vietnam; (T.-B.-N.D.); (T.-M.-T.N.); (V.-Q.N.)
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25
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Tran CL, Dao TBN, Tran TN, Mai DT, Tran TMD, Tran NMA, Dang VS, Vo TX, Duong TH, Sichaem J. Alpha-Glucosidase Inhibitory Diterpenes from Euphorbia antiquorum Growing in Vietnam. Molecules 2021; 26:molecules26082257. [PMID: 33924730 PMCID: PMC8069799 DOI: 10.3390/molecules26082257] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/10/2021] [Accepted: 04/11/2021] [Indexed: 01/02/2023] Open
Abstract
Bioactive-guided phytochemical investigation of Euphorbia antiquorum L. growing in Vietnam led to the isolation of five ent-atisanes, one seco-ent-atisane, and one lathyrane (ingol-type). The structures were elucidated as ent-1α,3α,16β,17-tetrahydroxyatisane (1), ethyl ent-3,4-seco-4,16β,17-trihydroxyatisane-3-carboxylate (2), ent-atisane-3-oxo-16β,17-acetonide (3), ent-3α-acetoxy-16β,17-dihydroxyatisane (4), ent-16β,17-dihydroxyatisane-3-one (5), calliterpenone (6), and ingol 12-acetate (7). Their chemical structures were unambiguously determined by analysis of one-dimensional (1D) and two-dimensional (2D) nuclear magnetic resonance (NMR) and high resolution mass spectrometry, as well as by comparison with literature data. Among them, 1 is a new compound while 2 is an ethylated artifact of ent-3,4-seco-4,16β,17-trihydroxyatisane-3-carboxylic acid, a new compound. Isolates were evaluated for alpha-glucosidase inhibition. Compound 3 showed the most significant inhibitory activity against alpha-glucosidase with an IC50 value of 69.62 µM. Further study on mechanism underlying yeast alpha-glucosidase inhibition indicated that 3 could retard the enzyme function by noncompetitive.
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Affiliation(s)
- Cong-Luan Tran
- Faculty of Pharmacy and Nursery, Tay Do University, Can Tho 94000, Vietnam;
| | - Thi-Bich-Ngoc Dao
- Department of Chemistry, University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City 72711, Vietnam; (T.-B.-N.D.); (T.-N.T.)
| | - Thanh-Nha Tran
- Department of Chemistry, University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City 72711, Vietnam; (T.-B.-N.D.); (T.-N.T.)
| | - Dinh-Tri Mai
- Vietnam Academy of Science and Technology, Graduate University of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 11355, Vietnam; (D.-T.M.); (V.-S.D.)
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, 01 Mac Dinh Chi, Ho Chi Minh City 71007, Vietnam
| | - Thi-Minh-Dinh Tran
- Department of Biology, University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City 72711, Vietnam;
| | - Nguyen-Minh-An Tran
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City 71420, Vietnam;
| | - Van-Son Dang
- Vietnam Academy of Science and Technology, Graduate University of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 11355, Vietnam; (D.-T.M.); (V.-S.D.)
- Vietnam Academy of Science and Technology, Institute of Tropical Biology, Ho Chi Minh City 71308, Vietnam
| | - Thi-Xuyen Vo
- Faculty of Technology, Van Lang University, Ho Chi Minh City 71013, Vietnam;
| | - Thuc-Huy Duong
- Department of Chemistry, University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City 72711, Vietnam; (T.-B.-N.D.); (T.-N.T.)
- Correspondence: (T.-H.D.); (J.S.); Tel.: +84-919011884 (T.-H.D.); +66-5423-7986 (J.S.)
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Center, Lampang 52190, Thailand
- Correspondence: (T.-H.D.); (J.S.); Tel.: +84-919011884 (T.-H.D.); +66-5423-7986 (J.S.)
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26
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Do TH, Nguyen TT, Dao TBN, Vo HC, Huynh BLC, Nguyen TAT, Mai DT, Vo TPG, Sichaem J, Nguyen NH, Duong TH. A new diphenyl ether from Parmotrema indicum Hale growing in Vietnam. Nat Prod Res 2021; 36:4879-4885. [PMID: 33823690 DOI: 10.1080/14786419.2021.1907748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Chemical investigation of the lichen Parmotrema indicum Hale led to the isolation of one new diphenyl ether, parmetherine D (1), along with eight known compounds (2-9). The structures were determined by analysis of MS and NMR data and by comparison with the literature. Compounds 1, 2, and 7 were evaluated for α-glucosidase inhibition. Only compound 1 exhibited significant inhibition.
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Affiliation(s)
- Thanh-Hung Do
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
| | - Thanh-Trung Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang, Vietnam.,Faculty of Pharmacy, Duy Tan University, Da Nang, Vietnam
| | - Thi-Bich-Ngoc Dao
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Huu-Canh Vo
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | | | | | - Dinh-Tri Mai
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Thi-Phi-Giao Vo
- Faculty of Biology, Ho Chi Minh University of Science, National University, Ho Chi Minh City, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, Thailand
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
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27
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Pham NKT, Nguyen HT, Dao TBN, Vu-Huynh KL, Nguyen TQT, Huynh BLC, Le TD, Nguyen NH, Nguyen NH, Duong TH. Two new phenolic compounds from the lichen Parmotrema cristiferum growing in Vietnam. Nat Prod Res 2021; 36:3865-3871. [PMID: 33656403 DOI: 10.1080/14786419.2021.1892672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Two new phenolic compounds, cristiferides A-B (1-2) together with six known compounds, 2,4-dihydroxyphthalide (3), lecanoric acid (4), orsellinic acid (5), 5-chloroorsellinic acid (6), methyl haematommate (7), and methyl β-orsellinate (8) were isolated from the lichen Parmotrema cristiferum (Taylor) Hale (Parmeliaceae). The structures of isolated compounds were identified from its spectroscopic data and by comparison with the literatures. Compounds 1-3 and 6-8 were evaluated for alpha-glucosidase inhibition. Compounds 2 and 7 revealed potent activity with IC50 values of 72.66 μM and 48.73 μM, respectively.
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Affiliation(s)
| | - Huy Truong Nguyen
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Thi-Bich-Ngoc Dao
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Kim Long Vu-Huynh
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | | | | | - Tien-Dung Le
- Vietnam Academy of Science and Technology, Graduate University of Science and Technology, Ha Noi, Vietnam.,Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Ngoc-Hung Nguyen
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, University of Education, Ho Chi Minh City, Vietnam
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28
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Duong TH, Nguyen VK, Sichaem J, Tran TN, Do TH, Pham NKT, Nguyen TAT, Nguyen THT, Mai DT, Nguyen NH, Huynh BLC. Reticulatin, a novel C 43-spiroterpenoid from the lichen Parmotrema reticulatum growing in Vietnam. Nat Prod Res 2021; 36:3705-3712. [PMID: 33576270 DOI: 10.1080/14786419.2021.1885032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
A novel C43-spiroterpenoid, reticulatin (1), was isolated from the lichen Parmotrema reticulatum (Taylor) M. Choisy (Parmeliaceae). Five previously-reported compounds were also isolated: zeorin (2), leucotylin (3), lupeol (4), betulinic acid (5), and dihydroreynosin (6). The structures were elucidated by 1D, 2D NMR, and HRESIMS spectroscopy and comparison with the literature. We propose that reticulatin is a biosynthetic product of fusicoccadiene and vinapraesorediosic acid A via Diels-Alder addition. Reticulatin is the first C43-spiroterpenoid identified from lichen metabolites. All compounds were evaluated for inhibition of α-glucosidase. Compound 1 showed the most potent inhibition, with an IC50 value of 3.90 μM, much lower than that of the acarbose positive control (IC50 165 µM).
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Affiliation(s)
- Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Van-Kieu Nguyen
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam.,Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, Thailand
| | - Thanh-Nha Tran
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Thanh-Hung Do
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
| | | | - Thi-Anh-Tuyet Nguyen
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Thi-Hoai-Thu Nguyen
- Faculty of Basic Sciences, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Dinh-Tri Mai
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Ngoc-Hong Nguyen
- CirTech Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
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