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Liu L, Wang Z, Yap PL, Zhang Q, Ni Y, Losic D. Inhibition of α-glucosidase activity by curcumin loaded on ZnO@rGO nanocarrier for potential treatment of diabetes mellitus. LUMINESCENCE 2024; 39:e4668. [PMID: 38286596 DOI: 10.1002/bio.4668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 10/15/2023] [Accepted: 11/22/2023] [Indexed: 01/31/2024]
Abstract
Curcumin (Cur) is an acidic polyphenol with some effects on α-glucosidase (α-Glu), but Cur has disadvantages such as being a weak target, lacking passing the blood-brain barrier and having low bioavailability. To enhance the curative effect of Cur, the hybrid composed of ZnO nanoparticles decorated on rGO was used to load Cur (ZnO@rGO-Cur). The use of the multispectral method and enzyme inhibition kinetics analysis certify the inhibitory effect and interaction mechanism of ZnO@rGO-Cur with α-Glu. The static quenching of α-Glu with both Cur and ZnO@rGO-Cur is primarily driven by hydrogen bond and van der Waals interactions. The conformation-changing ability by binding to the neighbouring phenolic hydroxyl group of Cur increased their ability to alter the secondary structure of α-Glu, resulting in the inhibition of enzyme activity. The inhibition constant (Ki, Cur > Kis,ZnO@rGO-Cur ) showed that the inhibition effect of ZnO@rGO-Cur on α-Glu was larger than that of Cur. The CCK-8 experiments proved that ZnO@rGO nanocomposites have good biocompatibility. These results suggest that the therapeutic potential of ZnO@rGO-Cur composite is an emerging nanocarrier platform for drug delivery systems for the potential treatment of diabetes mellitus.
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Affiliation(s)
- Linghong Liu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, China
| | - Zhu Wang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, China
| | - Pei Lay Yap
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, South Australia, Australia
| | - Qiulan Zhang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, China
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, China
| | - Yongnian Ni
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, China
| | - Dusan Losic
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, South Australia, Australia
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Karade SS, Franco EJ, Rojas AC, Hanrahan KC, Kolesnikov A, Yu W, MacKerell AD, Hill DC, Weber DJ, Brown AN, Treston AM, Mariuzza RA. Structure-Based Design of Potent Iminosugar Inhibitors of Endoplasmic Reticulum α-Glucosidase I with Anti-SARS-CoV-2 Activity. J Med Chem 2023; 66:2744-2760. [PMID: 36762932 PMCID: PMC10278443 DOI: 10.1021/acs.jmedchem.2c01750] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Enveloped viruses depend on the host endoplasmic reticulum (ER) quality control (QC) machinery for proper glycoprotein folding. The endoplasmic reticulum quality control (ERQC) enzyme α-glucosidase I (α-GluI) is an attractive target for developing broad-spectrum antivirals. We synthesized 28 inhibitors designed to interact with all four subsites of the α-GluI active site. These inhibitors are derivatives of the iminosugars 1-deoxynojirimycin (1-DNJ) and valiolamine. Crystal structures of ER α-GluI bound to 25 1-DNJ and three valiolamine derivatives revealed the basis for inhibitory potency. We established the structure-activity relationship (SAR) and used the Site Identification by Ligand Competitive Saturation (SILCS) method to develop a model for predicting α-GluI inhibition. We screened the compounds against SARS-CoV-2 in vitro to identify those with greater antiviral activity than the benchmark α-glucosidase inhibitor UV-4. These host-targeting compounds are candidates for investigation in animal models of SARS-CoV-2 and for testing against other viruses that rely on ERQC for correct glycoprotein folding.
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Affiliation(s)
- Sharanbasappa S. Karade
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD 20850, USA
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD 20742, USA
| | - Evelyn J. Franco
- Institute for Therapeutic Innovation, Department of Medicine, College of Medicine, University of Florida, Orlando, FL 32827, USA
| | - Ana C. Rojas
- Institute for Therapeutic Innovation, Department of Medicine, College of Medicine, University of Florida, Orlando, FL 32827, USA
| | - Kaley C. Hanrahan
- Institute for Therapeutic Innovation, Department of Medicine, College of Medicine, University of Florida, Orlando, FL 32827, USA
| | - Alexander Kolesnikov
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD 20850, USA
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD 20742, USA
| | - Wenbo Yu
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD 20850, USA
- Computer-Aided Drug Design Center, Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, MD 21201, USA
- Center for Biomolecular Therapeutics (CBT), Department of Biochemistry and Molecular Biology, School of Medicine, University of Maryland, Baltimore, MD 21201, USA
| | - Alexander D. MacKerell
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD 20850, USA
- Computer-Aided Drug Design Center, Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, MD 21201, USA
- Center for Biomolecular Therapeutics (CBT), Department of Biochemistry and Molecular Biology, School of Medicine, University of Maryland, Baltimore, MD 21201, USA
| | | | - David J. Weber
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD 20850, USA
- Center for Biomolecular Therapeutics (CBT), Department of Biochemistry and Molecular Biology, School of Medicine, University of Maryland, Baltimore, MD 21201, USA
| | - Ashley N. Brown
- Institute for Therapeutic Innovation, Department of Medicine, College of Medicine, University of Florida, Orlando, FL 32827, USA
| | - Anthony M. Treston
- Emergent BioSolutions, Gaithersburg, MD 20879, USA
- Current address: Treadwell Therapeutics, Toronto M5G 2M9, Canada
| | - Roy A. Mariuzza
- University of Maryland Institute for Bioscience and Biotechnology Research, Rockville, MD 20850, USA
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD 20742, USA
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Wang Z, Zhang Y, Yan H. In situ net fishing of α-glucosidase inhibitors from evening primrose ( Oenothera biennis) defatted seeds by combination of LC-MS/MS, molecular networking, affinity-based ultrafiltration, and molecular docking. Food Funct 2022; 13:2545-2558. [PMID: 35165681 DOI: 10.1039/d1fo03975j] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Defatted seeds of evening primrose (DSEP), the by-product of evening primrose oil manufacture, exhibit potential α-glucosidase inhibitory activity; however, presently they are routinely discarded as waste. In this study, an in situ net fishing strategy was proposed for rapid recognition of α-glucosidase inhibitors from DSEP. Firstly, the DSEP extraction method was optimized employing a response surface methodology for the recovery of α-glucosidase inhibitors, just like "finding a good fishery before net fishing". Then, molecular networks of DSEP were generated by GNPS-based molecular networking after LC-MS/MS analysis, just like "casting tight nets in the fishery". Subsequently, affinity-based ultrafiltration was carried out for fishing the "hit" together with its structural analogues according to the molecular networks, just like "hauling the specific net fishing". Finally, molecular docking analysis was performed to rapidly verify α-glucosidase inhibitory activities of the potential bioactive components and predict their inhibition mechanisms. In the results, DSEP displayed significant inhibitory effects against yeast and rat intestinal α-glucosidase, and the results of an oral starch tolerance test suggested that DSEP showed postprandial blood-glucose-lowering activity. Moreover, 1-galloyl-glucose, gallic acid, methyl gallate, 1,6-digalloyl-β-D-glucose, and 1,3,6-trigalloylglucose were rapidly identified as potential α-glucosidase inhibitors present in DSEP.
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Affiliation(s)
- Zhiqiang Wang
- Key Laboratory of Public Health Safety of Hebei Province, School of Public Health, Hebei University, Baoding, 071002, China.
| | - Yuxian Zhang
- Key Laboratory of Public Health Safety of Hebei Province, School of Public Health, Hebei University, Baoding, 071002, China.
| | - Hongyuan Yan
- Key Laboratory of Public Health Safety of Hebei Province, School of Public Health, Hebei University, Baoding, 071002, China.
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, College of Pharmaceutical Sciences, Hebei University, Baoding, 071002, China
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Li M, Li S, Hu J, Gao X, Wang Y, Liu Z, Zhang W. Thioester-Containing Benzoate Derivatives with α-Glucosidase Inhibitory Activity from the Deep-Sea-Derived Fungus Talaromyces indigoticus FS688. Mar Drugs 2021; 20:33. [PMID: 35049889 PMCID: PMC8781869 DOI: 10.3390/md20010033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 12/25/2021] [Accepted: 12/27/2021] [Indexed: 11/17/2022] Open
Abstract
Eurothiocins C-H (1-6), six unusual thioester-containing benzoate derivatives, were isolated from the deep-sea-derived fungus Talaromyces indigoticus FS688 together with a known analogue eurothiocin A (7). Their structures were elucidated through spectroscopic analysis and the absolute configurations were determined by X-ray diffraction and ECD calculations. In addition, compound 1 exhibited significant inhibitory activity against α-glucosidase with an IC50 value of 5.4 μM, while compounds 4 and 5 showed moderate effects with IC50 values of 33.6 and 72.1 μM, respectively. A preliminary structure-activity relationship is discussed and a docking analysis was performed.
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Affiliation(s)
- Mingqiong Li
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Institute of Microbiology, Guangdong Academy of Sciences, 100 Central Xianlie Road, Yuexiu District, Guangzhou 510070, China; (M.L.); (S.L.); (J.H.)
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China;
| | - Saini Li
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Institute of Microbiology, Guangdong Academy of Sciences, 100 Central Xianlie Road, Yuexiu District, Guangzhou 510070, China; (M.L.); (S.L.); (J.H.)
| | - Jinhua Hu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Institute of Microbiology, Guangdong Academy of Sciences, 100 Central Xianlie Road, Yuexiu District, Guangzhou 510070, China; (M.L.); (S.L.); (J.H.)
| | - Xiaoxia Gao
- College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China;
| | - Yanlin Wang
- Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou 510301, China;
| | - Zhaoming Liu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Institute of Microbiology, Guangdong Academy of Sciences, 100 Central Xianlie Road, Yuexiu District, Guangzhou 510070, China; (M.L.); (S.L.); (J.H.)
| | - Weimin Zhang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Institute of Microbiology, Guangdong Academy of Sciences, 100 Central Xianlie Road, Yuexiu District, Guangzhou 510070, China; (M.L.); (S.L.); (J.H.)
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Borges PHO, Pedreiro S, Baptista SJ, Geraldes CFGC, Batista MT, Silva MMC, Figueirinha A. Inhibition of α-glucosidase by flavonoids of Cymbopogon citratus (DC) Stapf. J Ethnopharmacol 2021; 280:114470. [PMID: 34329713 DOI: 10.1016/j.jep.2021.114470] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 07/13/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Leaves extracts from Cymbopogon citratus (DC) Stapf. are widely used in traditional medicine exhibiting several in vivo biological activities, including antidiabetic. Several flavonoids, including aglycones and glycosides, were reported in this plant and previous studies suggested that flavonoids may interact with targets related to diabetes. AIM OF THE STUDY Evaluated the hypoglycemic activity of C. citratus flavonoids through α-glucosidase inhibition and assess the structure-activity relationship using molecular docking studies. MATERIAL AND METHODS An infusion of C. citratus leaves and its flavonoid-rich fraction were prepared. Five flavonoids from this fraction were isolated and structurally characterized by UV spectral analysis with shift reagents, HPLC-PDA-ESI/MSn and 1H NMR. The antidiabetic potential of C. citratus infusion, its flavonoid-rich fraction, glycosylated flavonoids and aglycones was evaluated trough the in vitro inhibition of yeast α-glucosidase. Posteriorly, molecular docking of the tested flavonoids was performed to investigate its possible interactions with the α-glucosidase pocket. RESULTS The infusion of C. citratus, its flavonoid-rich fraction, luteolin and five flavone glycosides namely, luteolin 6-C-β-glucopyranoside (isoorientin), luteolin 7-O-neohesperidoside (ionicerin), luteolin 7-O-β-glucopyranoside (cynaroside), Luteolin 2″-O-rhamnosyl-C-(6-deoxy-ribo-hexos-3-ulosyl) (cassiaoccidentalin B), luteolin 6-C-α-arabinofuranosil-(1→2)-α-L-rhamnopyranoside (kurilesin A) showed higher inhibitory activity than the reference drug. This activity increased by the addition of a sugar moiety. However, the di-glycosides were less active than mono-glycosides. The docking studies showed interactions of sugar moieties and A or B rings with the catalytic pocket mainly through hydrogen bonds. CONCLUSIONS Our results corroborate the potential of C. citratus as a medicinal plant for the treatment of diabetes and revealed that its flavonoid glycosides has hypoglycemic effect and can be explored as drug candidates to act as α-glucosidase inhibitors in the treatment of diabetes.
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Affiliation(s)
- Pedro H O Borges
- University of Coimbra, Faculty of Pharmacy of University of Coimbra, Coimbra, Portugal
| | - Sónia Pedreiro
- University of Coimbra, Faculty of Pharmacy of University of Coimbra, Coimbra, Portugal; LAQV, REQUIMTE, Faculty of Pharmacy, University of Coimbra, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
| | - Salete J Baptista
- Center for Nuclear Sciences and Technologies, Instituto Superior Técnico, University of Lisbon, Portugal; CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Carlos F G C Geraldes
- Department of Life Sciences, Faculty of Science and Technology, University of Coimbra, Coimbra, Portugal; Coimbra Chemistry Center, Faculty of Science and Technology, University of Coimbra, Coimbra, Portugal
| | - M T Batista
- University of Coimbra, Faculty of Pharmacy of University of Coimbra, Coimbra, Portugal; CIEPQPF, Department of Chemical Engineering, Faculty of Science and Technology, University of Coimbra, 3030-790, Coimbra, Portugal
| | - Maria M C Silva
- University of Coimbra, Faculty of Pharmacy of University of Coimbra, Coimbra, Portugal; CNC - Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.
| | - Artur Figueirinha
- University of Coimbra, Faculty of Pharmacy of University of Coimbra, Coimbra, Portugal; LAQV, REQUIMTE, Faculty of Pharmacy, University of Coimbra, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal.
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To DC, Bui TQ, Nhung NTA, Tran QT, Do TT, Tran MH, Hien PP, Ngu TN, Quy PT, Nguyen TH, Nguyen HT, Nguyen TD, Nguyen PH. On the Inhibitability of Natural Products Isolated from Tetradium ruticarpum towards Tyrosine Phosphatase 1B (PTP1B) and α-Glucosidase (3W37): An In Vitro and In Silico Study. Molecules 2021; 26:3691. [PMID: 34204232 PMCID: PMC8233831 DOI: 10.3390/molecules26123691] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 06/14/2021] [Indexed: 11/16/2022] Open
Abstract
Folk experiences suggest natural products in Tetradium ruticarpum can be effective inhibitors towards diabetes-related enzymes. The compounds were experimentally isolated, structurally elucidated, and tested in vitro for their inhibition effects on tyrosine phosphatase 1B (PTP1B) and α-glucosidase (3W37). Density functional theory and molecular docking techniques were utilized as computational methods to predict the stability of the ligands and simulate interaction between the studied inhibitory agents and the targeted proteins. Structural elucidation identifies two natural products: 2-heptyl-1-methylquinolin-4-one (1) and 3-[4-(4-methylhydroxy-2-butenyloxy)-phenyl]-2-propenol (2). In vitro study shows that the compounds (1 and 2) possess high potentiality for the inhibition of PTP1B (IC50 values of 24.3 ± 0.8, and 47.7 ± 1.1 μM) and α-glucosidase (IC50 values of 92.1 ± 0.8, and 167.4 ± 0.4 μM). DS values and the number of interactions obtained from docking simulation highly correlate with the experimental results yielded. Furthermore, in-depth analyses of the structure-activity relationship suggest significant contributions of amino acids Arg254 and Arg676 to the conformational distortion of PTP1B and 3W37 structures overall, thus leading to the deterioration of their enzymatic activity observed in assay-based experiments. This study encourages further investigations either to develop appropriate alternatives for diabetes treatment or to verify the role of amino acids Arg254 and Arg676.
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Affiliation(s)
- Dao-Cuong To
- Nano Institute (PHENA), Phenikaa University, Yen Nghia, Ha Dong District, Hanoi 12116, Vietnam;
- A&A Green Phoenix Group JSC, Phenikaa Research and Technology Institute (PRATI), 167 Hoang Ngan, Cau Giay District, Hanoi 11313, Vietnam
| | - Thanh Q. Bui
- Department of Chemistry, University of Sciences, Hue University, Hue City 530000, Vietnam; (T.Q.B.); (N.T.A.N.)
| | - Nguyen Thi Ai Nhung
- Department of Chemistry, University of Sciences, Hue University, Hue City 530000, Vietnam; (T.Q.B.); (N.T.A.N.)
| | - Quoc-Toan Tran
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay District, Hanoi 122100, Vietnam; (Q.-T.T.); (T.-T.D.)
| | - Thi-Thuy Do
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay District, Hanoi 122100, Vietnam; (Q.-T.T.); (T.-T.D.)
| | - Manh-Hung Tran
- Faculty of Hi-Tech Agricultural and Food Sciences, Dong A University, Da Nang City 550000, Vietnam;
| | - Phan-Phuoc Hien
- Institute of Applied Science and Technology, Van Lang University, Ho Chi Minh City 700000, Vietnam;
| | - Truong-Nhan Ngu
- Department of Natural Sciences & Technology, Tay Nguyen University, Buon Ma Thuot, Dak Lak 630000, Vietnam; (T.-N.N.); (P.-T.Q.)
| | - Phan-Tu Quy
- Department of Natural Sciences & Technology, Tay Nguyen University, Buon Ma Thuot, Dak Lak 630000, Vietnam; (T.-N.N.); (P.-T.Q.)
| | - The-Hung Nguyen
- College of Agriculture and Forestry, Thai Nguyen University (TUAF), Quyet Thang 24119, Vietnam; (T.-H.N.); (H.-T.N.)
| | - Huu-Tho Nguyen
- College of Agriculture and Forestry, Thai Nguyen University (TUAF), Quyet Thang 24119, Vietnam; (T.-H.N.); (H.-T.N.)
| | - Tien-Dung Nguyen
- College of Agriculture and Forestry, Thai Nguyen University (TUAF), Quyet Thang 24119, Vietnam; (T.-H.N.); (H.-T.N.)
- Institute of Forestry Researh and Development, TUAF, Quyet Thang 24119, Vietnam
| | - Phi-Hung Nguyen
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay District, Hanoi 122100, Vietnam; (Q.-T.T.); (T.-T.D.)
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Asraoui F, Kounnoun A, Cacciola F, El Mansouri F, Kabach I, Oulad El Majdoub Y, Alibrando F, Arena K, Trovato E, Mondello L, Louajri A. Phytochemical Profile, Antioxidant Capacity, α-Amylase and α-Glucosidase Inhibitory Potential of Wild Moroccan Inula viscosa (L.) Aiton Leaves. Molecules 2021; 26:3134. [PMID: 34073905 PMCID: PMC8197302 DOI: 10.3390/molecules26113134] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/17/2021] [Accepted: 05/21/2021] [Indexed: 01/04/2023] Open
Abstract
Medicinal plants offer imperative sources of innovative chemical substances with important potential therapeutic effects. Among them, the members of the genus Inula have been widely used in traditional medicine for the treatment of several diseases. The present study investigated the antioxidant (DPPH, ABTS and FRAP assays) and the in vitro anti-hyperglycemic potential of aerial parts of Inula viscosa (L.) Aiton (I. viscosa) extracts through the inhibition of digestive enzymes (α-amylase and α-glucosidase), responsible of the digestion of poly and oligosaccharides. The polyphenolic profile of the Inula viscosa (L.) Aiton EtOAc extract was also investigated using HPLC-DAD/ESI-MS analysis, whereas the volatile composition was elucidated by GC-MS. The chemical analysis resulted in the detection of twenty-one polyphenolic compounds, whereas the volatile profile highlighted the occurrence of forty-eight different compounds. Inula viscosa (L.) Aiton presented values as high as 87.2 ± 0.50 mg GAE/g and 78.6 ± 0.55mg CE/g, for gallic acid and catechin, respectively. The EtOAc extract exhibited the higher antioxidant activity compared to methanol and chloroform extracts in different tests with (IC50 = 0.6 ± 0.03 µg/mL; IC50 = 8.6 ± 0.08 µg/mL; 634.8 mg ± 1.45 AAE/g extract) in DPPH, ABTS and FRAP tests. Moreover, Inula viscosa (L.) Aiton leaves did show an important inhibitory effect against α-amylase and α-glucosidase. On the basis of the results achieved, such a species represents a promising traditional medicine, thanks to its remarkable content of functional bioactive compounds, thus opening new prospects for research and innovative phytopharmaceuticals developments.
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Affiliation(s)
- Fadoua Asraoui
- Laboratory of Applied Biology and Pathology, Department of Biology, Faculty of Sciences of Tetouan, Abdelmalek Essaâdi University, Tetouan 93000, Morocco; (A.K.); (A.L.)
| | - Ayoub Kounnoun
- Laboratory of Applied Biology and Pathology, Department of Biology, Faculty of Sciences of Tetouan, Abdelmalek Essaâdi University, Tetouan 93000, Morocco; (A.K.); (A.L.)
| | - Francesco Cacciola
- Department of Biomedical, Dental, Morphological and Functional Imaging Sciences, University of Messina, 98125 Messina, Italy
| | - Fouad El Mansouri
- Laboratory of Chemical Engineering and Valorization of Resources, Department of Chemistry, Faculty of Sciences and Technology, Abdelmalek Essaâdi University, Tangier 416, Morocco;
| | - Imad Kabach
- Laboratory of Biochemistry and Molecular Genetics, Faculty of Sciences and Technologies of Tangier, Tangier 416, Morocco;
| | - Yassine Oulad El Majdoub
- Department of Chemical Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy; (Y.O.E.M.); (K.A.); (L.M.)
| | - Filippo Alibrando
- Chromaleont s.r.l., c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy; (F.A.); (E.T.)
| | - Katia Arena
- Department of Chemical Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy; (Y.O.E.M.); (K.A.); (L.M.)
| | - Emanuela Trovato
- Chromaleont s.r.l., c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy; (F.A.); (E.T.)
| | - Luigi Mondello
- Department of Chemical Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy; (Y.O.E.M.); (K.A.); (L.M.)
- Chromaleont s.r.l., c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy; (F.A.); (E.T.)
- Department of Sciences and Technologies for Human and Environment, University Campus Bio-Medico of Rome, 00128 Rome, Italy
- BeSep s.r.l., c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, 98168 Messina, Italy
| | - Adnane Louajri
- Laboratory of Applied Biology and Pathology, Department of Biology, Faculty of Sciences of Tetouan, Abdelmalek Essaâdi University, Tetouan 93000, Morocco; (A.K.); (A.L.)
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Gomes JHDS, Mbiakop UC, Oliveira RL, Stehmann JR, Pádua RMD, Cortes SF, Braga FC. Polyphenol-rich extract and fractions of Terminalia phaeocarpa Eichler possess hypoglycemic effect, reduce the release of cytokines, and inhibit lipase, α-glucosidase, and α-amilase enzymes. J Ethnopharmacol 2021; 271:113847. [PMID: 33515684 DOI: 10.1016/j.jep.2021.113847] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 01/08/2021] [Accepted: 01/15/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE species of Terminalia (Combretaceae) are used to treat diabetes and metabolic disorders in Asia, Africa, and America. Terminalia phaeocarpa Eichler is an endemic tree from Brazil, popularly known as capitão. This species is closely related to Terminalia argentea Mart., also vulgarly known as capitão, a native but not endemic tree. Due to their phenotype similarity, these species might eventually prove inseparable and they are indistinctly used by locals to treat diabetes, among other diseases. The potential antidiabetic effect of T. argentea has been previously reported, whereas the biological effects and chemical composition of T. phaeocarpa have never been addressed so far. AIM OF THE STUDY investigate the hypoglycaemic effect of an ethanol extract (EE) of T. phaeocarpa leaves and its ethyl acetate (FrEtOAc) and hydromethanolic (FrMEOH) fractions, in addition to their activity on the release of pro-inflammatory mediators and inhibition of lipase, α-amylase, and α-glucosidase enzymes. Additionally, it aimed to characterize the chemical composition of the extract and fractions, seeking to identify the compounds related to the biological activities. MATERIALS AND METHODS The effect on the release of TNF-α, IL-1β, and CCL-2 was evaluated in LPS-stimulated THP-1 cells (ATCC TIB-202). The inhibition of lipase, α-amylase, and α-glucosidase was tested in vitro, whereas the hypoglycemic effect was assayed in the oral starch tolerance test. The chemical composition was investigated by extensive UHPLC-DAD-ESI-MS/MS analyses. RESULTS The extract and derived fractions reduced TNF-α (EE pIC50 = 4.58 ± 0.01; FrEtOAc pIC50 = 4.69 ± 0.01; FrMeOH pIC50 = 4.54 ± 0.02) and IL-1β (EE pIC50 = 4.86 ± 0.02; FrEtOAc pIC50 = 4.86 ± 0.02; FrMeOH pIC50 = 4.75 ± 0.01) release by LPS-stimulated THP-1 cells in a concentration-dependent manner, whereas the inhibitory effect on CCL-2 release did not reach a clear linear relationship for the tested concentrations. The extract and fractions also inhibited in vitro the activity of lipase (EE pIC50 = 3.97 ± 0.12; FrEtOAc pIC50 = 3.87 ± 0.04; FrMeOH pIC50 = 3.67 ± 0.14), α-amylase (EE pIC50 = 4.46 ± 0.27; FrEtOAc pIC50 = 5.47 ± 0.27; FrMeOH pIC50 = 4.26 ± 0.22), and α-glucosidase (EE pIC50 = 5.46 ± 0.05; FrEtOAc pIC50 = 5.79 ± 0.11; FrMeOH pIC50 = 5.74 ± 0.05). The pIC50 values of the test samples were lower than those obtained with orlistat (7.59 ± 0.08) and acarbose (6.04 ± 0.37 and 7.63 ± 0.04) employed as the positive controls respectively in the lipase, α-amylase, and α-glucosidase assays. When assayed in the oral starch tolerance test, the extract and fractions also reduced animal glycaemia. UHPLC-DAD-ESI-MS/MS analyses of the extract and fractions led to the identification of 38 phenolic compounds, mainly phenolic acids, ellagitannins and flavonoids, among others, all of them first-time described for the species. CONCLUSION Based on our findings, T. phaeocarpa has hypoglycaemic activity and polyphenols are the probable bioactive compounds, which support the ethnomedical use of the species.
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Affiliation(s)
- José Hugo de Sousa Gomes
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Brazil
| | - Ulrich Carlos Mbiakop
- Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Brazil
| | - Renata Leite Oliveira
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Brazil
| | - João Renato Stehmann
- Department of Botany, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Brazil
| | - Rodrigo Maia de Pádua
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Brazil
| | - Steyner F Cortes
- Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Brazil
| | - Fernão Castro Braga
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Brazil.
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9
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Srinuanchai W, Nooin R, Pitchakarn P, Karinchai J, Suttisansanee U, Chansriniyom C, Jarussophon S, Temviriyanukul P, Nuchuchua O. Inhibitory effects of Gymnema inodorum (Lour.) Decne leaf extracts and its triterpene saponin on carbohydrate digestion and intestinal glucose absorption. J Ethnopharmacol 2021; 266:113398. [PMID: 32971162 DOI: 10.1016/j.jep.2020.113398] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 09/15/2020] [Accepted: 09/16/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Chiang-Da, Gymnema inodorum (Lour.) Decne. (GI), is an ethnomedicinal plant that has been used for diabetic treatment since ancient times. One of the anti-diabetic mechanisms is possibly related to the actions of triterpene glycoside, (3β, 16β)-16,28-dihydroxyolean-12-en-3-yl-O-β-D-glucopyranosyl-β-D-glucopyranosiduronic acid (GIA1) in decreasing carbohydrate digestive enzymes and intestinal glucose absorption in the gut system. AIMS OF THE STUDY To observe the amount of GIA1 in GI leaf extracts obtained from different ethanol concentrations and to investigate the anti-hyperglycemic mechanisms of the extracts and GIA1. MATERIALS AND METHODS The crude extracts were prepared using 50%v/v to 95%v/v ethanol solutions and used for GIA1 isolation. The anti-hyperglycemic models included in our study examined the inhibitory activities of α-amylase/α-glucosidase and intestinal glucose absorption related to sodium glucose cotransporter type 1 (SGLT1) using Caco-2 cells. RESULTS GIA1 was found about 8%w/w to 18%w/w in the GI extract depending on ethanol concentrations. The GI extracts and GIA1 showed less inhibitory activities on α-amylase. The extracts from 75%v/v and 95%v/v ethanol and GIA1 significantly delayed the glycemic absorption by lowering α-glucosidase activity and glucose transportation of SGLT1. However, the 50%v/v ethanolic extract markedly decreased the α-glucosidase activity than the SGLT1 function. CONCLUSION Differences in the GIA1 contents and anti-glycemic properties of the GI leaf extract was dependent on ethanol concentrations. Furthermore, the inhibitory effects of the 75%v/v and 95%v/v ethanolic extracts on α-glucosidase and SGLT1 were relevant to GIA1 content.
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Affiliation(s)
- Wanwisa Srinuanchai
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | - Rawiwan Nooin
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | - Pornsiri Pitchakarn
- Department of Biochemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Jirarat Karinchai
- Department of Biochemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | | | - Chaisak Chansriniyom
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand; Natural Products and Nanoparticles Research Unit, Chulalongkorn University, Bangkok, Thailand
| | - Suwatchai Jarussophon
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
| | | | - Onanong Nuchuchua
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand.
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10
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Ghaffari MA, Chaudhry BA, Uzair M, Imran M, Haneef M, Ashfaq K. Biological and phytochemical investigations of crude extracts of Astragalus creticus. Pak J Pharm Sci 2021; 34:403-409. [PMID: 34275786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This study was carried out to isolate the secondary metabolites and to evaluate the antibacterial, antifungal, antioxidant, phytotoxic, anti-leishmanial and α-glucosidase activities of dichloromethane and methanol extracts of whole plant of Astragalus creticus. Preliminary phytochemical screening indicated flavonoids, saponins, tannins and cardiac glycosides in this plant. Phytochemical evaluation of methanol extract resulted in isolation and characterization of Ethyl gallate, 1-triacontanoic acid, quercimeritrin, kaempferol-7-O-β-D-glucopyranose, myricetin, kaempferol, betulinic acid, stigmasterol and Daucosterol. The structures of the compounds were determined by Mass and NMR spectroscopy. The methanol extract exhibited better activity against Staphylococcus aureus (58.75%) while dichloromethane extract was found to be very active against Bacillus subtilis (56.30%).The methanol extract demonstrated highly significant phytotoxic (92.68% at 1000μg/ml) and antioxidant (64.55±0.43%) potential while both extracts identified best inhibition of α-glucosidase enzyme. The plant extracts showed non-significant antifungal and anti-leishmanial activities. To our knowledge, it's a first research study on Astragalus creticus that indicate a great biological and phytochemical potential in it.
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Affiliation(s)
| | - Bashir Ahmad Chaudhry
- Department of Pharmaceutical Chemistry, Bahauddin Zakriya University, Multan, Pakistan
| | - Muhammad Uzair
- Department of Pharmaceutical Chemistry, Bahauddin Zakriya University, Multan, Pakistan
| | - Muhammad Imran
- Department of Chemistry, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Muhammad Haneef
- Faculty of Pharmacy, Benazir Bhutto Shaheed University, Lyari, Karachi, Pakistan
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11
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Hall F, Reddivari L, Liceaga AM. Identification and Characterization of Edible Cricket Peptides on Hypertensive and Glycemic In Vitro Inhibition and Their Anti-Inflammatory Activity on RAW 264.7 Macrophage Cells. Nutrients 2020; 12:nu12113588. [PMID: 33238450 PMCID: PMC7700588 DOI: 10.3390/nu12113588] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/17/2020] [Accepted: 11/18/2020] [Indexed: 01/25/2023] Open
Abstract
Recent studies continue to demonstrate the potential of edible insects as a protein base to obtain bioactive peptides applicable for functional food development. This study aimed at identifying antihypertensive, anti-glycemic, and anti-inflammatory peptides derived from the in vitro gastrointestinal digests of cricket protein hydrolysates. After sequential fractionation, the protein digest subfraction containing the lowest molecular weight (<0.5 kDa), hydrophobic (C18) and cationic peptides (IEX) was found responsible for the most bioactivity. The cationic peptide fraction significantly reduced (p < 0.05) α-amylase, α-glucosidase, and angiotensin converting enzyme (ACE) activity in vitro, and also inhibited the expression of NF-κB in RAW 264.7 macrophage cells. A total of 28 peptides were identified with mass spectrometry (LC–MS/MS) and de novo sequencing from the potent fraction. Three novel peptides YKPRP, PHGAP, and VGPPQ were chosen for the molecular docking studies. PHGAP and VGPPQ exhibited a higher degree of non-covalent interactions with the enzyme active site residues and binding energies comparable to captopril. Results from this study demonstrate the bioactive potential of edible cricket peptides, especially as ACE inhibitors.
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Affiliation(s)
- Felicia Hall
- Protein Chemistry and Bioactive Peptides Laboratory, Purdue University, West Lafayette, IN 47907, USA;
- Department of Food Science, Purdue University, 745 Agriculture Drive, West Lafayette, IN 47907, USA;
| | - Lavanya Reddivari
- Department of Food Science, Purdue University, 745 Agriculture Drive, West Lafayette, IN 47907, USA;
| | - Andrea M. Liceaga
- Protein Chemistry and Bioactive Peptides Laboratory, Purdue University, West Lafayette, IN 47907, USA;
- Department of Food Science, Purdue University, 745 Agriculture Drive, West Lafayette, IN 47907, USA;
- Correspondence: ; Tel.: +1-765-496-2460
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12
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Kazakova OB, Giniyatullina GV, Mustafin AG, Babkov DA, Sokolova EV, Spasov AA. Evaluation of Cytotoxicity and α-Glucosidase Inhibitory Activity of Amide and Polyamino-Derivatives of Lupane Triterpenoids. Molecules 2020; 25:E4833. [PMID: 33092246 PMCID: PMC7587962 DOI: 10.3390/molecules25204833] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 10/19/2020] [Accepted: 10/19/2020] [Indexed: 12/17/2022] Open
Abstract
A series of two new and twenty earlier synthesized branched extra-amino-triterpenoids obtained by the direct coupling of betulinic/betulonic acids with polymethylenpolyamines, or by the cyanoethylation of lupane type alcohols, oximes, amines, and amides with the following reduction were evaluated for cytotoxicity toward the NCI-60 cancer cell line panel, α-glucosidase inhibitory, and antimicrobial activities. Lupane carboxamides, conjugates with diaminopropane, triethylenetetramine, and branched C3-cyanoethylated polyamine methyl betulonate showed high cytotoxic activity against most of the tested cancer cell lines with GI50 that ranged from 1.09 to 54.40 µM. Betulonic acid C28-conjugate with triethylenetetramine and C3,C28-bis-aminopropoxy-betulin were found to be potent micromolar inhibitors of yeast α-glucosidase and to simultaneously inhibit the endosomal reticulum α-glucosidase, rendering them as potentially capable to suppress tumor invasiveness and neovascularization, in addition to the direct cytotoxicity. Plausible mechanisms of cytotoxic action and underlying disrupted molecular pathways were elucidated with CellMinner pattern analysis and Gene Ontology enrichment analysis, according to which the lead compounds exert multi-target antiproliferative activity associated with oxidative stress induction and chromatin structure alteration. The betulonic acid diethylentriamine conjugate showed partial activity against methicillin-resistant S. aureus and the fungi C. neoformans. These results show that triterpenic polyamines, being analogs of steroidal squalamine and trodusquemine, are important substances for the search of new drugs with anticancer, antidiabetic, and antimicrobial activities.
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Affiliation(s)
- Oxana B. Kazakova
- Ufa Institute of Chemistry of the Ufa Federal Research Centre of the Russian Academy of Sciences, 71 pr. Oktyabrya, 450054 Ufa, Russia; (G.V.G.); (A.G.M.)
| | - Gul’nara V. Giniyatullina
- Ufa Institute of Chemistry of the Ufa Federal Research Centre of the Russian Academy of Sciences, 71 pr. Oktyabrya, 450054 Ufa, Russia; (G.V.G.); (A.G.M.)
| | - Akhat G. Mustafin
- Ufa Institute of Chemistry of the Ufa Federal Research Centre of the Russian Academy of Sciences, 71 pr. Oktyabrya, 450054 Ufa, Russia; (G.V.G.); (A.G.M.)
| | - Denis A. Babkov
- Laboratory of Metabotropic Drugs, Scientific Center for Innovative Drugs, Volgograd State Medical University, Novorossiyskaya st. 39, 400087 Volgograd, Russia; (D.A.B.); (E.V.S.)
| | - Elena V. Sokolova
- Laboratory of Metabotropic Drugs, Scientific Center for Innovative Drugs, Volgograd State Medical University, Novorossiyskaya st. 39, 400087 Volgograd, Russia; (D.A.B.); (E.V.S.)
| | - Alexander A. Spasov
- Laboratory of Metabotropic Drugs, Scientific Center for Innovative Drugs, Volgograd State Medical University, Novorossiyskaya st. 39, 400087 Volgograd, Russia; (D.A.B.); (E.V.S.)
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Cardullo N, Muccilli V, Cunsolo V, Tringali C. Mass Spectrometry and 1H-NMR Study of Schinopsis lorentzii (Quebracho) Tannins as a Source of Hypoglycemic and Antioxidant Principles. Molecules 2020; 25:molecules25143257. [PMID: 32708865 PMCID: PMC7397293 DOI: 10.3390/molecules25143257] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/10/2020] [Accepted: 07/16/2020] [Indexed: 11/23/2022] Open
Abstract
The ethyl acetate extract of the commercial tannin Tan’Activ QS-SOL (from Schinopsis lorentzii wood), employed for the production of red wine, was subjected to chromatography on Sephadex LH-20, providing nine fractions (A-1–A-9), which were estimated for total phenols content (GAE), antioxidant activity (DPPH, ORAC), and hypoglycemic activity (α-glucosidase and α-amylase inhibition). All the fractions were analyzed by means of HPLC/ESI-MS/MS and 1H-NMR to identify the principal active constituents. Fractions A-1 and A-3 showed the highest antioxidant activity and gallic acid (1), pyrogallol (3), eriodictyol (6), catechin (12), and taxifolin (30) were identified as the major constituents. The highest α-glucosidase and α-amylase inhibitory activity was observed in fractions A-7–A-9 containing condensed (9′, 15, 18, 19, 23, and 27) hydrolysable tannins (13 and 32) as well as esters of quinic acid with different units of gallic acid (5, 11, 11′, 14, and 22). This last class of gallic acid esters are here reported for the first time as α-glucosidase and α-amylase inhibitors.
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Ahn JH, Park Y, Yeon SW, Jo YH, Han YK, Turk A, Ryu SH, Hwang BY, Lee KY, Lee MK. Phenylpropanoid-Conjugated Triterpenoids from the Leaves of Actinidia arguta and Their Inhibitory Activity on α-Glucosidase. J Nat Prod 2020; 83:1416-1423. [PMID: 32315181 DOI: 10.1021/acs.jnatprod.9b00643] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Actinidia arguta, commonly called hardy kiwifruit or kiwiberry, has cold-resistant properties and can be cultivated in Asia, including Korea. Seven new triterpenoids (2-4 and 8-11) along with eight known triterpenoids were isolated from the leaves of A. arguta through various chromatographic techniques. The new triterpenoids were defined as actiniargupenes A-C (2-4), actinidic acid derivatives with phenylpropanoid constituent units, dehydroisoactinidic acid (8), and actiniargupenes D-F (9-11), asiatic acid derivatives with phenylpropanoid substituents, on the basis of 1D and 2D NMR and MS data. Among the triterpenoids, those with a phenylpropanoid constituent unit showed inhibitory activity on α-glucosidase, which suggested the importance of the phenylpropanoid moiety. Molecular docking analysis demonstrated the interaction between the 4'-OH group of the phenylpropanoid moiety and α-glucosidase.
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Affiliation(s)
- Jong Hoon Ahn
- College of Pharmacy, Chungbuk National University, Cheongju 28160, Korea
| | - Youngki Park
- Division of Special Purpose Trees, National Institute of Forest Science, Suwon 16631, Korea
| | - Sang Won Yeon
- College of Pharmacy, Chungbuk National University, Cheongju 28160, Korea
| | - Yang Hee Jo
- College of Pharmacy, Chungbuk National University, Cheongju 28160, Korea
| | - Yoo Kyong Han
- College of Pharmacy, Korea University, Sejong 47236, Korea
| | - Ayman Turk
- College of Pharmacy, Chungbuk National University, Cheongju 28160, Korea
| | - Se Hwan Ryu
- College of Pharmacy, Chungbuk National University, Cheongju 28160, Korea
| | - Bang Yeon Hwang
- College of Pharmacy, Chungbuk National University, Cheongju 28160, Korea
| | - Ki Yong Lee
- College of Pharmacy, Korea University, Sejong 47236, Korea
| | - Mi Kyeong Lee
- College of Pharmacy, Chungbuk National University, Cheongju 28160, Korea
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Fawzi Mahomoodally M, Picot-Allain MCN, Zengin G, Llorent-Martínez EJ, Abdullah HH, Ak G, Senkardes I, Chiavaroli A, Menghini L, Recinella L, Brunetti L, Leone S, Orlando G, Ferrante C. Phytochemical Analysis, Network Pharmacology and in Silico Investigations on Anacamptis pyramidalis Tuber Extracts. Molecules 2020; 25:E2422. [PMID: 32455936 PMCID: PMC7288046 DOI: 10.3390/molecules25102422] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/15/2020] [Accepted: 05/20/2020] [Indexed: 12/16/2022] Open
Abstract
Anacamptis pyramidalis (L.) Rich. forms part of the Orchidaceae family that is highlyvalued for its horticultural as well as therapeutic benefits. The present study set out to investigatethe inhibitory activity of A. pyramidalis tubers against key biological targets for the management oftype 2 diabetes, Alzheimer disease, and skin hyperpigmentation. In addition, the antioxidantpotential of the extracts was also assessed using multiple methods. The detailed phytochemicalprofiles of the extracts were determined using high-performance liquid chromatography. Based onqualitative phytochemical fingerprint, a network pharmacology analysis was conducted as well.Parishin was identified from the water extract only, whereas gastrodin and caffeic acid derivativeswere present in the methanol extract. The methanol extract exhibited high inhibitory activityagainst tyrosinase (69.69 mg kojic acid equivalent/g extract), α-amylase (15.76 mg acarboseequivalent/g extract), and α-glucosidase (20.07 mg acarbose equivalent/g extract). Similarly, themethanol extract showed highest antioxidant potential (22.12, 44.23, 45.56, and 29.38 mg Troloxequivalent/g extract, for 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), CUPric Reducing Antioxidant Capacity (CUPRAC),and Ferric Reducing Antioxidant Power (FRAP) assays, respectively). Finally, the results ofnetwork pharmacology analysis, besides corroborating traditional uses of plant extracts in themanagement of cold and flu, confirmed a direct involvement of identified phytochemicals in theobserved enzyme inhibitory effects, especially against tyrosinase, α-amylase, and α-glucosidase.Furthermore, based on the results of both colorimetric assays and network pharmacology analysis related to the activity of A. pyramidalis extracts and identified phytocompounds on enzymesinvolved in type 2 diabetes, a docking study was conducted in order to investigate the putativeinteractions of oxo-dihydroxy octadecenoic acid trihydroxy octadecenoic acid against aldosereductase, peroxisome proliferator-activated receptor (PPAR)-α, dipeptidyl peptidase (DPP)-IV,and α-glucosidase. Docking analysis suggested the inhibitory activity of these compounds againstthe aforementioned enzymes, with a better inhibitory profile shown by oxo-dihydroxyoctadecenoic acid. Overall, the present findings supported the rationale for the use of A.pyramidalis as source of bioactive metabolites and highlight, today more than ever, for the strongnecessity of linkage strategy between wild resource valorization and conservation policy.
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Affiliation(s)
- Mohamad Fawzi Mahomoodally
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City 758307, Vietnam;
- Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 758307, Vietnam
| | | | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, Campus, Konya 42130, Turkey;
| | - Eulogio J. Llorent-Martínez
- Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas S/N, E-23071 Jaén, Spain;
| | - Hassan H. Abdullah
- Chemistry Department, College of Education, Salahaddin University-Erbil, Erbil 44001, Iraq;
| | - Gunes Ak
- Department of Biology, Science Faculty, Selcuk University, Campus, Konya 42130, Turkey;
| | - Ismail Senkardes
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Marmara University, Istanbul 34668, Turkey;
| | - Annalisa Chiavaroli
- Department of Pharmacy, “G. d’Annunzio” University Chieti-Pescara, 66100 Chieti, Italy; (A.C.); (L.R.); (L.B.); (S.L.); (G.O.); (C.F.)
| | - Luigi Menghini
- Department of Pharmacy, “G. d’Annunzio” University Chieti-Pescara, 66100 Chieti, Italy; (A.C.); (L.R.); (L.B.); (S.L.); (G.O.); (C.F.)
| | - Lucia Recinella
- Department of Pharmacy, “G. d’Annunzio” University Chieti-Pescara, 66100 Chieti, Italy; (A.C.); (L.R.); (L.B.); (S.L.); (G.O.); (C.F.)
| | - Luigi Brunetti
- Department of Pharmacy, “G. d’Annunzio” University Chieti-Pescara, 66100 Chieti, Italy; (A.C.); (L.R.); (L.B.); (S.L.); (G.O.); (C.F.)
| | - Sheila Leone
- Department of Pharmacy, “G. d’Annunzio” University Chieti-Pescara, 66100 Chieti, Italy; (A.C.); (L.R.); (L.B.); (S.L.); (G.O.); (C.F.)
| | - Giustino Orlando
- Department of Pharmacy, “G. d’Annunzio” University Chieti-Pescara, 66100 Chieti, Italy; (A.C.); (L.R.); (L.B.); (S.L.); (G.O.); (C.F.)
| | - Claudio Ferrante
- Department of Pharmacy, “G. d’Annunzio” University Chieti-Pescara, 66100 Chieti, Italy; (A.C.); (L.R.); (L.B.); (S.L.); (G.O.); (C.F.)
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Nafeesa K, Aziz-Ur-Rehman , Abbasi MA, Siddiqui SZ, Rasool S, Ali Shah SA, Ashraf M, Jahan B, Lodhi MA, Khan FA. α-Glucosidase inhibitory potential and hemolytic evaluation of newly synthesized 3,4,5-trisubstituted-1,2,4-triazole derivatives. Pak J Pharm Sci 2019; 32:2651-2658. [PMID: 31969298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A series of 1, 2, 4-triazole derivatives bearing piperidine moiety has been introduced as new anti-diabetic drug candidates with least cytotoxicity. p-Chlorophenylsulfonyl chloride (1) and ethyl nipecotate (2) were the starting reagents that resulted into corresponding 3,4,5-trisubstituted-1,2,4-triazole (6) through a series of steps. A series of electrophiles, 9a-e, were synthesized by reacting 4-bromobutyryl chloride (7) with differently substituted aromatic amines (8a-e) under basic aqueous medium. Target derivatives, 10a-e, were synthesized by the reaction of compound 6 with N-aryl-4-bromobutanamides (9a-e) in an aprotic solvent. Structures of all the derivatives were verified by spectroscopic analysis using IR, 1H-NMR, 13C-NMR and EIMS. Most of the derivatives revealed moderate to good α-glucosidase inhibitory activity with reference to acarbose. The moderate hemolytic potential demonstrated least toxicity.
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Affiliation(s)
| | | | | | | | - Shahid Rasool
- Department of Chemistry, GC University, Lahore, Pakistan
| | - Syed Adnan Ali Shah
- Atta-ur-Rahman Institute for Natural Products Discovery (AuRIns), Universiti Teknologi MARA, Puncak Alam Campus, Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia/Department of Pharmacy, Universiti Teknologi MARA, Puncak Alam Campus, Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia
| | - Muhammad Ashraf
- Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Bakhat Jahan
- Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | | | - Farman Ali Khan
- Department of Biochemistry, Abdul Wali Khan University, Mardan, Pakistan
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17
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Wajidi M, Vaid FH, Rizwani GH, Faiyaz A, Shareef H, Akram A, Ahmed A. Anti-Oxidant and digestive enzymes inhibitory based anti diabetic activity of crude and fractions of Carum carvi L. extracts. Pak J Pharm Sci 2019; 32:2687-2695. [PMID: 31969303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In the present study crude ethanolic extract and its various fractions (ethyl acetate, hexane and aqueous) of medicinal plant Carum carvi L. were examined for α-amylase and α-glucosidase inhibition using an-in vitro model. Both digestive enzymes were extracted from bovine and green gram. The crude extract and its fractions were also studied for their antioxidant potential by DPPH and Nitric oxide activity. The quantitative assessment of phenol and flavonoid contents was also estimated. The crude extract and its fractions exhibited high in-vitro enzyme inhibitory activity against α-amylase and α-glucosidase at different concentrations with IC50 ranging from 421.4±7.8 to 810±5.71and 72±8.81 to 307.0±11.42μg/mL of each extract respectively. The plant showed highest total phenolic contents ranging from 29.5±0.49 to 112.5±0.36mg/g Gallic acid of extract, while the total flavonoid contents were estimated from3.08±0.02-85.4± 0.12mg/g Quercetin. The antioxidant activities of the all extracts, measured in terms of IC50 values were in the range of 53.05±1.98 to 211.5±31.06μg/mL. Nitric oxide scavenging ability exhibited their IC50 values from 26.3±5.51 to 121.3±5.32μg/mL. Ethanolic crude extract showed excellent result among all these fractions. GCMS analysis of ethanolic extract of Carum carvi L indicated the presence of several phytochemicals such as monoterpenes, unsaturated fatty acids, furan derivatives, phenolic and flavonoid contents.
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Affiliation(s)
- Mehwish Wajidi
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Pakistan
| | - Faiyaz Hm Vaid
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Pakistan
| | - Ghazala H Rizwani
- Department of Pharmacognosy, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, Pakistan
| | - Ambreen Faiyaz
- College of Medicine, Basic Medical Science Department, King Saud Bin Abdul Aziz University of Health Sciences, Jeddah, KSA
| | - Huma Shareef
- Department of Pharmacognosy, Institute of Pharmaceutical Sciences, Jinnah Sindh Medical University, Karachi, Pakistan
| | - Arfa Akram
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Federal Urdu University of Arts, Science and Technology, Karachi
| | - Ateka Ahmed
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Pakistan
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18
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Meesakul P, Richardson C, Pyne SG, Laphookhieo S. α-Glucosidase Inhibitory Flavonoids and Oxepinones from the Leaf and Twig Extracts of Desmos cochinchinensis. J Nat Prod 2019; 82:741-747. [PMID: 30835120 DOI: 10.1021/acs.jnatprod.8b00581] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Four new flavonoids (1-4), a new benzyl benzoate derivative (5), five new oxepinones (6-10), and 14 known compounds (11-24) were isolated from the leaf and twig extracts of Desmos cochinchinensis. Their structures were established by spectroscopic methods. The structure of 1 was also confirmed by X-ray diffraction data. The absolute configurations of 3, 4, and 6-10 were determined from comparisons of their ECD spectra with those of relevant reported compounds. Compounds 1, 2, 6, 8, 10, 12-15, and 17 showed α-glucosidase inhibitory activities with IC50 values ranging from 0.2 to 4.9 μM.
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Affiliation(s)
- Pornphimol Meesakul
- School of Chemistry and Molecular Biosciences , University of Wollongong , Wollongong , New South Wales 2522 , Australia
| | - Christopher Richardson
- School of Chemistry and Molecular Biosciences , University of Wollongong , Wollongong , New South Wales 2522 , Australia
| | - Stephen G Pyne
- School of Chemistry and Molecular Biosciences , University of Wollongong , Wollongong , New South Wales 2522 , Australia
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19
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Karaś M, Jakubczyk A, Szymanowska U, Jęderka K, Lewicki S, Złotek U. Different Temperature Treatments of Millet Grains Affect the Biological Activity of Protein Hydrolyzates and Peptide Fractions. Nutrients 2019; 11:E550. [PMID: 30841527 PMCID: PMC6471899 DOI: 10.3390/nu11030550] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/23/2019] [Accepted: 02/27/2019] [Indexed: 12/28/2022] Open
Abstract
The objective of this study was to analyze millet protein hydrolyzates and peptide fractions with molecular mass under 3.0 kDa obtained from grains treated with different temperature values as inhibitors of angiotensin-converting enzyme (ACE), α-amylase, and α-glucosidase activity. The protein fractions were hydrolyzed in vitro in gastrointestinal conditions and the highest degree of hydrolysis was noted for globulin 7S obtained from control grains (98.33%). All samples were characterized by a high peptide bioaccessibility index, which was 23.89 for peptides obtained from globulin 11S after treatment with 100 °C. The highest peptide bioavailability index was noted for peptides obtained from globulin 11S after the treatment with 65 °C (2.12). The highest potential metabolic syndrome inhibitory effect was determined for peptide fractions obtained from the prolamin control (IC50 for ACE and α-amylase was 0.42 and 0.11 mg/mL, respectively) and after the 100 °C treatment (IC50 for ACE and α-glucosidase was 0.33 and 0.12 mg/mL, respectively) and from globulin 11S after the 65 °C treatment (IC50 0.38 and 0.05 for ACE and α-glucosidase, respectively). The effect of these samples on endothelial cell HECa10 was determined. The sequences of potential inhibitory peptides were identified as GEHGGAGMGGGQFQPV, EQGFLPGPEESGR, RLARAGLAQ, YGNPVGGVGH, and GNPVGGVGHGTTGT.
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Affiliation(s)
- Monika Karaś
- Department of Biochemistry and Food Chemistry, University of Life Sciences, Skromna 8, 20-704 Lublin, Poland.
| | - Anna Jakubczyk
- Department of Biochemistry and Food Chemistry, University of Life Sciences, Skromna 8, 20-704 Lublin, Poland.
| | - Urszula Szymanowska
- Department of Biochemistry and Food Chemistry, University of Life Sciences, Skromna 8, 20-704 Lublin, Poland.
| | - Krystyna Jęderka
- Department of Regenerative Medicine and Cell Biology, Military Institute of Hygiene and Epidemiology, Kozielska 4, 01-163 Warsaw, Poland.
| | - Sławomir Lewicki
- Department of Regenerative Medicine and Cell Biology, Military Institute of Hygiene and Epidemiology, Kozielska 4, 01-163 Warsaw, Poland.
| | - Urszula Złotek
- Department of Biochemistry and Food Chemistry, University of Life Sciences, Skromna 8, 20-704 Lublin, Poland.
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20
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Zaharudin N, Staerk D, Dragsted LO. Inhibition of α-glucosidase activity by selected edible seaweeds and fucoxanthin. Food Chem 2019; 270:481-486. [PMID: 30174076 DOI: 10.1016/j.foodchem.2018.07.142] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 07/19/2018] [Accepted: 07/21/2018] [Indexed: 11/30/2022]
Abstract
A 5 mg/mL solution of water, methanol and acetone extracts of seaweeds were used for α-glucosidase inhibition assay hyphenated with high performance liquid chromatography-mass spectrometry (HPLC-HRMS). The results showed acetone extracts of Undaria pinnatifida has the strongest inhibitory effect against α-glucosidase activity with IC50 0.08 ± 0.002 mg/mL. The active compound found in Undaria pinnatifida was identified as fucoxanthin. Analytical standard sample of fucoxanthin significantly inhibited α-glucosidase with IC50 value 0.047 ± 0.001 mg/mL. An inhibition kinetics study indicates that fucoxanthin is showing mixed-type inhibition. These results suggest that Undaria pinnatifida has a potential to inhibit α-glucosidase and may be used as a bioactive food ingredient for glycaemic control.
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Affiliation(s)
- Nazikussabah Zaharudin
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen DK-1958, Denmark; Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, 26300 Gambang, Pahang, Malaysia.
| | - Dan Staerk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Lars Ove Dragsted
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen DK-1958, Denmark
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21
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Zeng L, Ding H, Hu X, Zhang G, Gong D. Galangin inhibits α-glucosidase activity and formation of non-enzymatic glycation products. Food Chem 2018; 271:70-79. [PMID: 30236734 DOI: 10.1016/j.foodchem.2018.07.148] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 07/16/2018] [Accepted: 07/23/2018] [Indexed: 11/18/2022]
Abstract
Inhibition of α-glucosidase and non-enzymatic glycation is considered as an effective approach to treat type 2 diabetes. Herein, multispectroscopic techniques and molecular docking analysis were used to investigate the inhibition of galangin on α-glucosidase and non-enzymatic glycation. Galangin showed a reversible inhibition on α-glucosidase activity in a mixed-type manner through a monophasic kinetic process, and induced the fluorescence quenching and conformational changes of α-glucosidase by forming α-glucosidase-galgangin complex. Molecular docking revealed that galangin primarily interacted with the amino acid residues within the active site of α-glucosidase, which may prevent the entrance of substrate resulting in a decrease in catalytic efficiency of α-glucosidase. Moreover, galangin moderately inhibited the formation of intermediates of non-enzymatic glycation, fructosamine and α-dicarbonyl compounds and strongly inhibited the formation of advanced glycation end products.
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Affiliation(s)
- Li Zeng
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Huafang Ding
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Xing Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Guowen Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China.
| | - Deming Gong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; New Zealand Institute of Natural Medicine Research, 8 Ha Crescent, Auckland 2104, New Zealand
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22
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Les F, Arbonés-Mainar JM, Valero MS, López V. Pomegranate polyphenols and urolithin A inhibit α-glucosidase, dipeptidyl peptidase-4, lipase, triglyceride accumulation and adipogenesis related genes in 3T3-L1 adipocyte-like cells. J Ethnopharmacol 2018; 220:67-74. [PMID: 29604377 DOI: 10.1016/j.jep.2018.03.029] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 02/16/2018] [Accepted: 03/23/2018] [Indexed: 06/08/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Pomegranate fruit is considered an antidiabetic medicine in certain systems of traditional medicine. In addition, pomegranate polyphenols are known as powerful antioxidants with beneficial effects such as the reduction of oxidative / inflammatory stress and the increase of protective signalling such as antioxidant enzymes, neurotrophic factors and cytoprotective proteins. AIM OF THE STUDY This work evaluates the effects of pomegranate juice, its main polyphenols known as ellagic acid and punicalagin, as well as its main metabolite urolithin A, on physiological and pharmacological targets of metabolic diseases such as obesity and diabetes. MATERIALS AND METHODS For this purpose, enzyme inhibition bioassays of lipase, α-glucosidase and dipeptidyl peptidase-4 were carried out in cell-free systems. Similarly, adipocytes derived from 3T3-L1 cells were employed to study the effects of ellagic acid, punicalagin and urolithin A on adipocyte differentiation and triglyceride (TG) accumulation. RESULTS Pomegranate juice, ellagic acid, punicalagin and urolithin A were able to inhibit lipase, α-glucosidase and dipeptidyl peptidase-4. Furthermore, all tested compounds but significantly the metabolite urolithin A displayed anti-adipogenic properties in a dose-dependent manner as they significantly reduced TG accumulation and gene expression related to adipocyte formation such as adiponectin, PPARγ, GLUT4, and FABP4 in 3T3-L1 adipocytes. CONCLUSION These results may explain from a molecular perspective the beneficial effects and traditional use of pomegranate in the prevention of metabolic-associated disorders such as obesity, diabetes and related complications.
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Affiliation(s)
- Francisco Les
- Department of Pharmacy, Faculty of Health Sciences, Universidad San Jorge, Villanueva de Gállego (Zaragoza) Spain; Adipocyte and Fat Biology Laboratory (AdipoFat), Unidad de Investigación Traslacional, Hospital Universitario Miguel Servet, Instituto Aragonés de Ciencias de la Salud (IACS), Instituto de Investigacion Sanitaria (IIS) Aragon, Zaragoza, Spain
| | - José Miguel Arbonés-Mainar
- Adipocyte and Fat Biology Laboratory (AdipoFat), Unidad de Investigación Traslacional, Hospital Universitario Miguel Servet, Instituto Aragonés de Ciencias de la Salud (IACS), Instituto de Investigacion Sanitaria (IIS) Aragon, Zaragoza, Spain; CIBER Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto Salud Carlos III, Madrid, Spain
| | - Marta Sofía Valero
- Departamento de Farmacología y Fisiología, Universidad de Zaragoza, Spain
| | - Víctor López
- Department of Pharmacy, Faculty of Health Sciences, Universidad San Jorge, Villanueva de Gállego (Zaragoza) Spain.
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23
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Chen XQ, Zhao J, Chen LX, Wang SF, Wang Y, Li SP. Lanostane triterpenes from the mushroom Ganoderma resinaceum and their inhibitory activities against α-glucosidase. Phytochemistry 2018; 149:103-115. [PMID: 29490285 DOI: 10.1016/j.phytochem.2018.01.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 12/29/2017] [Accepted: 01/12/2018] [Indexed: 06/08/2023]
Abstract
Eighteen previously undescribed lanostane triterpenes and thirty known analogues were obtained from the fruiting bodies of Ganoderma resinaceum. Resinacein C was isolated from a natural source for the first time. The structures of all the above compounds were elucidated by extensive spectroscopic analysis and comparisons of their spectroscopic data with those reported in the literature. Furthermore, in an in vitro assay, Resinacein C, ganoderic acid Y, lucialdehyde C, 7-oxo-ganoderic acid Z3, 7-oxo-ganoderic acid Z, and lucidadiol showed strong inhibitory effects against α-glucosidase compared with the positive control drug acarbose. The structure-activity relationships of ganoderma triterpenes on α-glucosidase inhibition showed that the C-24/C-25 double bond is necessary for α-glucosidase inhibitory activity. Moreover, the carboxylic acid group at C-26 and the hydroxy group at C-15 play important roles in enhancing inhibitory effects of these triterpenes.
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Affiliation(s)
- Xian-Qiang Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Jing Zhao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China.
| | - Ling-Xiao Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Shen-Fei Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Ying Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China.
| | - Shao-Ping Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China.
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24
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Kalita D, Holm DG, LaBarbera DV, Petrash JM, Jayanty SS. Inhibition of α-glucosidase, α-amylase, and aldose reductase by potato polyphenolic compounds. PLoS One 2018; 13:e0191025. [PMID: 29370193 PMCID: PMC5784920 DOI: 10.1371/journal.pone.0191025] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Accepted: 12/27/2017] [Indexed: 12/13/2022] Open
Abstract
Diabetes mellitus is a chronic disease that is becoming a serious global health problem. Diabetes has been considered to be one of the major risks of cataract and retinopathy. Synthetic and natural product inhibitors of carbohydrate degrading enzymes are able to reduce type 2 diabetes and its complications. For a long time, potatoes have been portrayed as unhealthy for diabetic patients by some nutritionist due to their high starch content. However, purple and red potato cultivars have received considerable attention from consumers because they have high levels of polyphenolic compounds that have potent antioxidant activities. In this study, we screened the total phenolics (TP) and total anthocyanins (TA) and analyzed the phenolic and anthocyanin compounds in selected potato cultivars and advanced selections with distinct flesh colors (purple, red, yellow and white). Purple and red potato cultivars had higher levels of TP and TA than tubers with other flesh colors. Chlorogenic acid is the predominant phenolic acid, and major anthocyanin is composed of the derivatives of petunidin, peonidin, malvidin and pelargonidin. We tested the potential inhibitory effect of potato extracts on the activities of α-amylase and α-glucosidase, which were targeted to develop antidiabetic therapeutic agents. We also measured inhibitory effect of potato extracts on aldose reductase (AR) which is a key enzyme that has been a major drug target for the development of therapies to treat diabetic complications. Purple flesh tubers extract showed the most effective inhibition of α-amylase, α-glucosidase, and aldose reductase with IC50 values 25, 42, and 32 μg/ml, respectively. Kinetic studies showed that anthocyanins are noncompetitive inhibitors of these enzymes, whereas phenolic acids behaved as mixed inhibitors for α-amylase and α-glucosidase and noncompetitive inhibitors for AR. This study supports the development of a positive and healthful image of potatoes, which is an important issue for consumers.
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Affiliation(s)
- Diganta Kalita
- San Luis Valley Research Center, Department of Horticulture and Landscape Architecture, Colorado State University, Center, United States of America
| | - David G. Holm
- San Luis Valley Research Center, Department of Horticulture and Landscape Architecture, Colorado State University, Center, United States of America
| | - Daniel V. LaBarbera
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, United States of America
| | - J. Mark Petrash
- Department of Ophthalmology, University of Colorado Anschutz Medical Campus, Aurora, United States of America
| | - Sastry S. Jayanty
- San Luis Valley Research Center, Department of Horticulture and Landscape Architecture, Colorado State University, Center, United States of America
- * E-mail:
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Gao E, Zhou ZQ, Zou J, Yu Y, Feng XL, Chen GD, He RR, Yao XS, Gao H. Bioactive Asarone-Derived Phenylpropanoids from the Rhizome of Acorus tatarinowii Schott. J Nat Prod 2017; 80:2923-2929. [PMID: 29116780 DOI: 10.1021/acs.jnatprod.7b00457] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Eight new (1a/1b, 2a, 3a, 4a/4b, and 5a/5b) and seven known (2b, 3b, and 6-10) asarone-derived phenylpropanoids, a known asarone-derived lignan (12), and four known lignan analogues (11 and 13-15) were isolated from the rhizome of Acorus tatarinowii Schott. The structures were elucidated via comprehensive spectroscopic analyses, modified Mosher's method, and quantum chemical calculations. Compounds 1-8 were present as enantiomers, and 1-5 were successfully resolved via chiral-phase HPLC. Compounds 1a/1b were the first cases of asarone-derived phenylpropanoids with an isopropyl C-3 side-chain tethered to a benzene core from nature. Hypoglycemic, antioxidant, and AChE inhibitory activities of 1-15 were assessed by the α-glucosidase inhibitory, ORAC, DPPH radical scavenging, and AChE inhibitory assays, respectively. All compounds except 3a showed α-glucosidase inhibitory activity. Compound 3b has the highest α-glucosidase inhibitory effect with an IC50 of 80.6 μM (positive drug acarbose IC50 of 442.4 μM). In the antioxidant assays, compounds 13-15 exhibited ORAC and DPPH radical scavenging activities. The results of the AChE inhibitory assay indicated that all compounds exhibited weak AChE inhibitory activities.
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Affiliation(s)
- En Gao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, and ‡Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University , Guangzhou 510632, People's Republic of China
| | - Zheng-Qun Zhou
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, and ‡Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University , Guangzhou 510632, People's Republic of China
| | - Jian Zou
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, and ‡Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University , Guangzhou 510632, People's Republic of China
| | - Yang Yu
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, and ‡Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University , Guangzhou 510632, People's Republic of China
| | - Xiao-Lin Feng
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, and ‡Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University , Guangzhou 510632, People's Republic of China
| | - Guo-Dong Chen
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, and ‡Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University , Guangzhou 510632, People's Republic of China
| | - Rong-Rong He
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, and ‡Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University , Guangzhou 510632, People's Republic of China
| | - Xin-Sheng Yao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, and ‡Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University , Guangzhou 510632, People's Republic of China
| | - Hao Gao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, and ‡Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University , Guangzhou 510632, People's Republic of China
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26
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Luo Y, Shen HY, Shen QX, Cao ZH, Zhang M, Long SY, Wang ZB, Tan JW. A new anthraquinone and a new naphthoquinone from the whole plant of Spermacoce latifolia. J Asian Nat Prod Res 2017; 19:869-876. [PMID: 28357881 DOI: 10.1080/10286020.2017.1279609] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 01/03/2017] [Indexed: 06/06/2023]
Abstract
A phytochemical study on the whole plant of Spermacoce latifolia led to the isolation of a new anthraquinone, 1,2,6-trihydroxy-5-methoxy-9,10-anthraquinone (1), and a new naphthoquinone, (2R)-6-hydroxy-7-methoxy-dehydroiso-α-lapachone (2), together with three known anthraquinones (3-5). Their structures were established on the basis of detailed spectroscopic analysis, including one- and two-dimensional NMR, ESI-MS, and HR-ESI-MS techniques. All the compounds were isolated from S. latifolia for the first time. Compounds 1, 2, 4, and 5 showed significant antibacterial activity toward Bacillus subtilis with MIC values ranging from 0.9 to 31.2 μg/ml, and compound 4 aslo exhibited antibacterial activity against Bacillus cereus with a MIC value 62.5 μg/ml. Compound 1 was further revealed to show significant in vitro α-glucosidase inhibitory activity with IC50 value of 0.653 mM.
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Affiliation(s)
- Ying Luo
- a School of Pharmacy and Biological Sciences, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study [Hunan Provincial Education Department Document (Approval Number: 2014-405)] , University of South China , Hengyang 421001 , China
- b Guangdong Provincial Key Laboratory of Applied Botany, South China Botanic Garden , Chinese Academy of Sciences , Guangzhou 510650 , China
| | - Hai-Yan Shen
- c Institute of Pathogenic Biology , University of South China , Hengyang 421001 , China
| | - Qing-Xiang Shen
- d Department of Gynaecology and Obstetrics, the Second Affiliated Hospital , University of South China , Hengyang 421001 , China
| | - Zhao-Hui Cao
- a School of Pharmacy and Biological Sciences, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study [Hunan Provincial Education Department Document (Approval Number: 2014-405)] , University of South China , Hengyang 421001 , China
| | - Min Zhang
- a School of Pharmacy and Biological Sciences, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study [Hunan Provincial Education Department Document (Approval Number: 2014-405)] , University of South China , Hengyang 421001 , China
| | - Shi-Yin Long
- a School of Pharmacy and Biological Sciences, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study [Hunan Provincial Education Department Document (Approval Number: 2014-405)] , University of South China , Hengyang 421001 , China
| | - Zong-Bao Wang
- a School of Pharmacy and Biological Sciences, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study [Hunan Provincial Education Department Document (Approval Number: 2014-405)] , University of South China , Hengyang 421001 , China
| | - Jian-Wen Tan
- b Guangdong Provincial Key Laboratory of Applied Botany, South China Botanic Garden , Chinese Academy of Sciences , Guangzhou 510650 , China
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Feng X, Lu YH, Liu Z, Li DP, Zou YX, Fang YQ, Chu ZY. Microbial transformation of the anti-diabetic agent corosolic acid by Cunninghamella echinulata. J Asian Nat Prod Res 2017; 19:645-650. [PMID: 27240189 DOI: 10.1080/10286020.2016.1187140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 05/03/2016] [Indexed: 06/05/2023]
Abstract
The pentacyclic triterpenoid corosolic acid was metabolized by Cunninghamella echinulata CGMCC 3.2000 to its C-24 aldehyde group metabolite and five other hydroxylated metabolites: madasiatic acid (2), 2α, 3β, 7β-trihydroxyurs-12-en-28-oic acid (3), 2α, 3β, 15α-trihydroxyurs-12-en-28-oic acid (4), 2α, 3β, 6β, 7β-tetrahydroxyurs-12-en-28-oic acid (5), 2α, 3β, 7β, 15α-tetrahydroxyurs-12-en-28-oic acid (6), and 2α, 3β,7β-trihydroxy-24-al-urs-12-en-28-oic acid (7); compounds 3, 5, and 7 were new compounds. The α-glucosidase inhibitory effects of the metabolites were also evaluated.
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Affiliation(s)
- Xu Feng
- a Navy Medical Research Institute , Shanghai 200433 , China
| | - Yan-Hua Lu
- b State Key Laboratory of Bioreactor Engineering , East China University of Science and Technology , Shanghai 200207 , China
| | - Zhen Liu
- a Navy Medical Research Institute , Shanghai 200433 , China
- c Shanghai Ocean University , Shanghai 201306 , China
| | - Dai-Ping Li
- a Navy Medical Research Institute , Shanghai 200433 , China
| | - Ying-Xin Zou
- a Navy Medical Research Institute , Shanghai 200433 , China
| | - Yi-Qun Fang
- a Navy Medical Research Institute , Shanghai 200433 , China
| | - Zhi-Yong Chu
- a Navy Medical Research Institute , Shanghai 200433 , China
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Dang PH, Nguyen HX, Nguyen HHT, Vo TD, Le TH, Phan THN, Nguyen MTT, Nguyen NT. Lignans from the Roots of Taxus wallichiana and Their α-Glucosidase Inhibitory Activities. J Nat Prod 2017; 80:1876-1882. [PMID: 28581744 DOI: 10.1021/acs.jnatprod.7b00171] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
From an EtOAc-soluble extract of the roots of Taxus wallichiana, six new (1-6) and 11 known lignans were isolated. The structures of the new compounds were elucidated based on interpretation of spectroscopic data. (+)-7'-epi-Tsugacetal (1) is a rare aryltetralin-type lignan having a cis-orientation of H-7' and H-8'. Compounds 3-6 were identified as the first naturally occurring tetrahydrofuranoid lignans having a cis-orientation of H-7 and H-8. All tested compounds were found to possess α-glucosidase inhibitory activity, with formosanol (9) showing the most potent effect with an IC50 value of 35.3 μM.
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Affiliation(s)
- Phu H Dang
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Hai X Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Hanh H T Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Thai D Vo
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Tho H Le
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Trong H N Phan
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Mai T T Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
- Cancer Research Laboratory, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Nhan T Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
- Cancer Research Laboratory, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
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Abstract
A dried infusion prepared from the aerial parts of Salvia circinata did not provoke acute toxicity in mice (LD50 > 5 g/kg). This infusion showed poor hypoglycemic and antihyperglycemic effects (100-570 mg/kg) when tested in normal and hyperglycemic mice using acute and oral glucose tolerance tests, respectively. However, this infusion possessed antihyperglycemic action in vivo during an oral sucrose tolerance test (31.6-316 mg/kg), suggesting the presence of α-glucosidase inhibitors in S. circinata. Fractionation of a nonpolar extract of the aerial parts of the plant yielded a new biflavone (1) and four new neoclerodane diterpenoid glucosides (2-5) along with the known compounds amarisolide (6), pedalitin (7), apigenin-7-O-β-d-glucoside (8), and the flavone 2-(3,4-dimethoxyphenyl)-5,6-dihydroxy-7-methoxy-4H-chromen-4-one (9). Compounds 1 and 6-9 were active against mammalian α-glucosidases; 6 and 7 were also active against a recombinant α-glucosidase from Ruminococcus obeum and reduced significantly the postprandial peak during an oral sucrose tolerance test in healthy mice, consistent with their α-glucosidase inhibitory activity. Molecular docking and dynamic studies revealed that compounds 6 and 7 might bind to α-glucosidases at the catalytic center of the enzyme.
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Affiliation(s)
- Laura Flores-Bocanegra
- Facultad de Química, ‡Facultad de Medicina, and §Instituto de Biología, Universidad Nacional Autónoma de México , Cuidad de México 04510, México
| | - Martin González-Andrade
- Facultad de Química, ‡Facultad de Medicina, and §Instituto de Biología, Universidad Nacional Autónoma de México , Cuidad de México 04510, México
| | - Robert Bye
- Facultad de Química, ‡Facultad de Medicina, and §Instituto de Biología, Universidad Nacional Autónoma de México , Cuidad de México 04510, México
| | - Edelmira Linares
- Facultad de Química, ‡Facultad de Medicina, and §Instituto de Biología, Universidad Nacional Autónoma de México , Cuidad de México 04510, México
| | - Rachel Mata
- Facultad de Química, ‡Facultad de Medicina, and §Instituto de Biología, Universidad Nacional Autónoma de México , Cuidad de México 04510, México
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Semaan DG, Igoli JO, Young L, Marrero E, Gray AI, Rowan EG. In vitro anti-diabetic activity of flavonoids and pheophytins from Allophylus cominia Sw . on PTP1B, DPPIV, alpha-glucosidase and alpha-amylase enzymes. J Ethnopharmacol 2017; 203:39-46. [PMID: 28341245 DOI: 10.1016/j.jep.2017.03.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 03/09/2017] [Accepted: 03/13/2017] [Indexed: 06/06/2023]
Abstract
BACKGROUND Ethno-botanical information from diabetic patients in Cuba led to the identification of Allophylus cominia as a possible source of new drugs for the treatment of type 2 diabetes mellitus (T2-DM). EXPERIMENTAL Chemical characterization of the extracts from A. cominia was carried out using chromatographic and spectroscopic methods. The extracts were tested for their activity on PTP1B, DPPIV, α-glucosidase enzymes and α-amylase. RESULTS The flavonoid rich fractions from A. cominia inhibited DPPIV enzyme (75.3±2.33%) at 30µg/ml and produced a concentration-dependent inhibition against DPPIV with a Ki value of 2.6µg/ml. At 30µg/ml, flavonoids and pheophytins extracts significantly inhibited PTP1B enzyme (100±2.6% and 68±1% respectively). The flavonoids, pheophytin A and pheophytin B fractions showed significant concentration-dependent inhibition against PTP1B with Ki values of 3µg/ml, 0.64µg/ml and 0.88µg/ml respectively. At 30µg/ml, the flavonoid fraction significantly inhibited α-glucosidase enzyme (86±0.3%) in a concentration-dependent pattern with a Ki value of 2µg/ml. None of the fractions showed significant effects on α-amylase. Fatty acids, tannins, pheophytins A and B, and a mixture of flavonoids were detected in the methanolic extract from A. cominia. The identified flavonoids were mearnsitrin, quercitrin, quercetin-3-alloside, and naringenin-7-glucoside. CONCLUSION The pharmacological effects of the extracts from A. cominia earlier observed in experimental diabetic models was confirmed in this study. Thus a new drug or formulation for the treatment of T2-DM could be developed from A. cominia.
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Affiliation(s)
- D G Semaan
- Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom.
| | - J O Igoli
- Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom; Department of Chemistry, University of Agriculture, PMB 2373 Makurdi, Nigeria
| | - L Young
- Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - E Marrero
- National Centre for Animal and Plant Health (Centro Nacional de Sanidad Agropecuaria), San José de las Lajas, Mayabeque, Cuba
| | - A I Gray
- Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - E G Rowan
- Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
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Khang PV, Phuong DM, Ma L. New steroids from Anemarrhena asphodeloides rhizome and their α-glucosidase inhibitory activity. J Asian Nat Prod Res 2017; 19:468-473. [PMID: 27658357 DOI: 10.1080/10286020.2016.1234459] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 09/06/2016] [Indexed: 06/06/2023]
Abstract
Two new steroids were isolated from acid hydrolysis residue of the rhizomes of Anemarrhena asphodeloides. Their structures were identified on the basis of several spectroscopic analysis approaches including 1D, 2D-NMR techniques, and MS data, and by the comparison of spectral data of the known compounds. The biological activities of these two isolated compounds were explored on α-glucosidase. Compound 1 displayed 4.7 folds inhibitory activity against α-glucosidase compared with the positive control acarbose.
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Affiliation(s)
- Pham Van Khang
- a Faculty of Chemistry , Thai Nguyen University of Education , Thai Nguyen City 250000 , Viet Nam
- b Shanghai Key Laboratory of New Drug Design, School of Pharmacy , East China University of Science and Technology , Shanghai 200237 , China
| | - Dao Mai Phuong
- a Faculty of Chemistry , Thai Nguyen University of Education , Thai Nguyen City 250000 , Viet Nam
| | - Lei Ma
- b Shanghai Key Laboratory of New Drug Design, School of Pharmacy , East China University of Science and Technology , Shanghai 200237 , China
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Abstract
Extensive fractionation of an extract from the grain-based culture of the endophytic fungus Preussia minimoides led to the isolation of two new polyketides with novel skeletons, minimoidiones A (1) and B (2), along with the known compounds preussochromone C (3), corymbiferone (4), and 5-hydroxy-2,7-dimethoxy-8-methylnaphthoquinone (5). The structures of 1 and 2 were elucidated using 1D and 2D NMR data analysis, along with DFT calculations of 1H NMR chemical shifts. The absolute configuration of 1 was established by a single-crystal X-ray diffraction analysis and TDDFT-ECD calculations. Compounds 1-4 significantly inhibited yeast α-glucosidase.
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Affiliation(s)
- Manuel Rangel-Grimaldo
- Facultad de Química, Universidad Nacional Autónoma de México , Ciudad de México 04510, México
| | - Isabel Rivero-Cruz
- Facultad de Química, Universidad Nacional Autónoma de México , Ciudad de México 04510, México
| | - Abraham Madariaga-Mazón
- Facultad de Química, Universidad Nacional Autónoma de México , Ciudad de México 04510, México
| | - Mario Figueroa
- Facultad de Química, Universidad Nacional Autónoma de México , Ciudad de México 04510, México
| | - Rachel Mata
- Facultad de Química, Universidad Nacional Autónoma de México , Ciudad de México 04510, México
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Wang H, Dong L, Ge JQ, Deng LN, Lan XZ, Liao ZH, Chen M. Rhobupcyanoside B, A new cyanoside from Rhodiola bupleuroides. J Asian Nat Prod Res 2016; 18:1108-1114. [PMID: 27248222 DOI: 10.1080/10286020.2016.1188806] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 05/09/2016] [Indexed: 06/05/2023]
Abstract
One new cyanoside, rhobupcyanoside B (1), together with 7 known ones, was isolated from the 70% ethanol extract of the roots and rhizomes of Rhodiola bupleuroides. Their structures were determined by spectroscopic methods, including 2D NMR techniques. Compound 1 was evaluated for its inhibitory activity against α-glucosidase with IC50 value of 278.28 ± 0.55 μM by comparing with the positive control (acarbose) at 210.40 ± 0.32 μM.
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Affiliation(s)
- Hong Wang
- a Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education , College of Pharmaceutical Sciences, Southwest University , Chongqing 400715 , China
| | - Li Dong
- a Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education , College of Pharmaceutical Sciences, Southwest University , Chongqing 400715 , China
| | - Jing-Qiu Ge
- a Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education , College of Pharmaceutical Sciences, Southwest University , Chongqing 400715 , China
| | - Li-Na Deng
- a Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education , College of Pharmaceutical Sciences, Southwest University , Chongqing 400715 , China
| | - Xiao-Zhong Lan
- b Tibetan Collaborative Innovation Center of Agricultural and Animal Husbandry Resources, TAAHC-SWU Medicinal Plant R&D Center , Agriculture and Animal Husbandry College, Tibet University , Nyingchi 860000 , China
| | - Zhi-Hua Liao
- c TAAHC-SWU Medicinal Plant R&D Center, School of Life Sciences , Southwest University , Chongqing 400715 , China
| | - Min Chen
- a Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education , College of Pharmaceutical Sciences, Southwest University , Chongqing 400715 , China
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Ibrahim MA, Koorbanally NA, Islam S. ANTI-OXIDATIVE, (α-GLUCOSIDASE AND α-AMYLASE INHIBITORY ACTIVITY OF VITEX DONIANA: POSSIBLE EXPLOITATION IN THE MANAGEMENT OF TYPE 2 DIABETES. Acta Pol Pharm 2016; 73:1235-1247. [PMID: 29638064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Vitex doniana is an important African medicinal plant traditionally used for the treatment of many diseases including type 2 diabetes (T2D). In this study, ethyl acetate, ethanol and aqueous extracts of the stem bark, root and leaf of V. doniana were analyzed for in vitro anti-oxidative activity and the results indicated that the ethanolic extract of the leaves had the best anti-oxidative activity. Subsequently, the ethanolic extract of the leaves was partitioned between hexane, dichloromethane, ethyl acetate and water. The aqueous fraction had a significantly ( p < 0.05) higher phenolics content and also showed the best anti-oxidative activity within the fractions. Furthermore, the aqueous fraction demonstrated significantly (p < 0.05) more potent inhibitory activities against α-glucosidase and α-amylase than other fractions. Steady state kinetics analysis revealed that the aqueous fraction inhibited both (α-glucosidase and (α-amylase activities in a non-competitive manner with inhibition binding constant (Ki) values of 5.93 and 167.44 μg/mL, respectively. Analysis of the aqueous fraction by GC-MS showed the presence of resorcinol, 4-hydroxybenzoic acid, 3,4,5-trimethoxyphenol and 2,4'-dihydroxychalcone identified by their mass fragmentation patterns and comparison to standard spectra. The results obtained in this study showed that V doniana leaves have a good in vitro anti-T2D potential possibly elicited through phenolics.
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Viveros-Valdez E, Jaramillo-Mora C, Oranday-Cardenas A, Mordn-Martinez J, Carranza-Rosales P. Antioxidant, cytotoxic and alpha-glucosidase inhibition activities from the Mexican berry "Anacahuita" (Cordia boissieri). Arch Latinoam Nutr 2016; 66:211-218. [PMID: 29870608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This study describes the total phenolic and flavonoid content as well as cytotoxic, alpha-glucosidase inhibition and antiradical/antioxidant potential of extracts obtained from the edible fruits of Cordia boissieri, which is widely distributed throughout northeastern Mexico. Phenolic and flavonoid content were evaluated by means of the Folin-Ciocalteu method and aluminum chloride colorimetric assay respectively. The antiradical/antioxidant activity was determined by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging and Trolox Equivalent Antioxidant Capacity (TEAC) assays. Cytotoxic activity was assessed by means of human cancer cell lines (MCF-7 and HeLa), alpha-glucosidase inhibition was determined by colorimetric assay using p-Nitrophenyl a-D-glucopyranoside (PNPG) as a substrate. Results indicate that extract of C. boissieri fruit has a good antioxidant potential to show a EC₅₀: 137.76 ± 35 ptg/mL and 65 ±2 ltM/g in the DPPH and TEAC assays respectively, inhibitor of the enzyme alpha-glu- cosidase involved in sugar uptake (ICSO: 215.20 ± 35 μg/ mL), cytotoxic activities against MCF-7 (IC50: 310 ± 42 μg/mL) and HeLa (IC₅₀0: 450.4 ±21μgg/mL) cancer cell lines as well as an important phenolic content with 230 t 23 mg/1OOg and 54±11 mg100g g of phenols and flavonoids totals respectively. These results point towards an interesting potential for the fruits of C. boissieri as chemopreventive properties and expand the possibilities.
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Singh B, Kaur T, Kaur S, Manhas RK, Kaur A. Insecticidal potential of an endophytic Cladosporium velox against Spodoptera litura mediated through inhibition of alpha glycosidases. Pestic Biochem Physiol 2016; 131:46-52. [PMID: 27265826 DOI: 10.1016/j.pestbp.2016.01.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 01/18/2016] [Accepted: 01/18/2016] [Indexed: 06/05/2023]
Abstract
Alpha glucosidase inhibitory activity was exhibited by partially purified fractions obtained from an endophytic Cladosporium velox, isolated from Tinospora cordifolia. Taking into account the increasing importance of digestive enzyme inhibitors as insecticidal agents, the entomopathogenic potential of the fractions obtained was evaluated against Spodoptera litura (Fab.), a polyphagous pest. Considerable mortality was obtained when the larvae were fed on diet supplemented with the partially purified extract. All the concentrations of the extract significantly prolonged the overall developmental period of S. litura. At higher concentrations, the extract influenced the longevity of females as well as their reproductive potential. Phytochemical analysis revealed the presence of phenolic compounds in the active fraction. The phenolic compound responsible for the bioactivities was purified and identified to be chlorogenic acid using HPLC and MS analysis. The content of chlorogenic acid in the extract was quantified to be 250μg/ml. The purified compound also demonstrated inhibition of alpha glycosidases in vivo. The present study indicates that the endophyte imparted resistance to the insects in the plants could be mediated through chlorogenic acid targeting the alpha glycosidases present in the gut of the insect. The isolate obtained can be exploited for the production of chlorogenic acid, which has the potential to be exploited as a biocontrol agent against S. litura.
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Affiliation(s)
- Bahaderjeet Singh
- Department of Microbiology, Guru Nanak Dev University, Amritsar 143005, India.
| | - Tamanreet Kaur
- Department of Zoology, Guru Nanak Dev University, Amritsar 143005, India.
| | - Sanehdeep Kaur
- Department of Zoology, Guru Nanak Dev University, Amritsar 143005, India.
| | - Rajesh K Manhas
- Department of Microbiology, Guru Nanak Dev University, Amritsar 143005, India.
| | - Amarjeet Kaur
- Department of Microbiology, Guru Nanak Dev University, Amritsar 143005, India.
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Peng JL, Wang J, Mei WL, Kong FD, Liu ZQ, Wang P, Gai CJ, Jiang B, Dai HF. Two new phragmalin-type limonoids from Chukrasia tabularis and their α-glucosidase inhibitory activity. J Asian Nat Prod Res 2016; 18:629-636. [PMID: 26837821 DOI: 10.1080/10286020.2015.1136291] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 12/22/2015] [Indexed: 06/05/2023]
Abstract
Phytochemical investigation on the stems of C. tabularis (Meliaceae) led to the isolation of two new phragmalin-type limonoids, named tabularisins S and T (1-2), along with five known ones (3-7). The structures of the new limonoids were established by spectroscopic methods including UV, IR, HRESIMS, and 1D and 2D NMR. All the compounds were evaluated for α-glucosidase inhibitory activity in vitro. Compounds 2 and 3 exhibited significant inhibitory activity against α-glucosidase with IC50 values of 0.15 and 0.03 mM, respectively (acarbose as positive control, IC50 0.95 mM).
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Affiliation(s)
- Jun-Lin Peng
- a Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture , National Center of Important Tropical Crops Engineering and Technology Research, Institute of Tropical Bioscience and Biotechnology , Chinese Academy of Tropical Agricultural Sciences , Haikou 571101 , China
- b College of Pharmacy and Chemistry , Dali University , Dali 671000 , China
| | - Jun Wang
- a Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture , National Center of Important Tropical Crops Engineering and Technology Research, Institute of Tropical Bioscience and Biotechnology , Chinese Academy of Tropical Agricultural Sciences , Haikou 571101 , China
| | - Wen-Li Mei
- a Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture , National Center of Important Tropical Crops Engineering and Technology Research, Institute of Tropical Bioscience and Biotechnology , Chinese Academy of Tropical Agricultural Sciences , Haikou 571101 , China
| | - Fan-Dong Kong
- a Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture , National Center of Important Tropical Crops Engineering and Technology Research, Institute of Tropical Bioscience and Biotechnology , Chinese Academy of Tropical Agricultural Sciences , Haikou 571101 , China
| | - Zi-Qi Liu
- b College of Pharmacy and Chemistry , Dali University , Dali 671000 , China
| | - Pei Wang
- a Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture , National Center of Important Tropical Crops Engineering and Technology Research, Institute of Tropical Bioscience and Biotechnology , Chinese Academy of Tropical Agricultural Sciences , Haikou 571101 , China
| | - Cui-Juan Gai
- a Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture , National Center of Important Tropical Crops Engineering and Technology Research, Institute of Tropical Bioscience and Biotechnology , Chinese Academy of Tropical Agricultural Sciences , Haikou 571101 , China
| | - Bei Jiang
- b College of Pharmacy and Chemistry , Dali University , Dali 671000 , China
| | - Hao-Fu Dai
- a Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture , National Center of Important Tropical Crops Engineering and Technology Research, Institute of Tropical Bioscience and Biotechnology , Chinese Academy of Tropical Agricultural Sciences , Haikou 571101 , China
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Abstract
Bioactivity-guided fractionation of an aqueous methanolic extract of manufactured gambir product from Uncaria gambir with in vitro α-glucosidase inhibitory activity was performed to isolate a novel prenyl resorcinol derivative (1) together with seven known compounds, including two flavone glycosides (2, 3), three catechin analogues (4-6), and two simple phenolics (7, 8). Structures of the isolated compounds were determined by analysis of physical and spectroscopic data (NMR, UV, [α]D, and MS). All isolates were evaluated for in vitro α-glucosidase inhibitory activity. Among the compounds, novel compound 1, possessing an unprecedented spirocyclopropane ring in the molecule, showed the most potent α-glucosidase inhibitory activity in this assay. On the other hand, compounds 4 and 7 showed less potent inhibitory effects in this same bioassay, with half-maximal inhibitory concentration values of 17.3 ± 1.0 μM and 27.0 ± 0.9 μM, respectively.
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Affiliation(s)
- Tae Hoon Kim
- Department of Food Science and Biotechnology, Daegu University, 201 Daegudae-ro, Gyeongsan-si, Gyeongsangbuk-do, 38453, Republic of Korea.
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39
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Wubshet SG, Tahtah Y, Heskes AM, Kongstad KT, Pateraki I, Hamberger B, Møller BL, Staerk D. Identification of PTP1B and α-Glucosidase Inhibitory Serrulatanes from Eremophila spp. by Combined use of Dual High-Resolution PTP1B and α-Glucosidase Inhibition Profiling and HPLC-HRMS-SPE-NMR. J Nat Prod 2016; 79:1063-72. [PMID: 26960032 DOI: 10.1021/acs.jnatprod.5b01128] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
According to the International Diabetes Federation, type 2 diabetes (T2D) has reached epidemic proportions, affecting more than 382 million people worldwide. Inhibition of protein tyrosine phosphatase-1B (PTP1B) and α-glucosidase is a recognized therapeutic approach for management of T2D and its associated complications. The lack of clinical drugs targeting PTP1B and side effects of the existing α-glucosidase drugs, emphasize the need for new drug leads for these T2D targets. In the present work, dual high-resolution PTP1B and α-glucosidase inhibition profiles of Eremophila gibbosa, E. glabra, and E. aff. drummondii "Kalgoorlie" were used for pinpointing α-glucosidase and/or PTP1B inhibitory constituents directly from the crude extracts. A subsequent targeted high-performance liquid chromatography-high-resolution mass spectrometry-solid-phase extraction-nuclear magnetic resonance spectroscopy (HPLC-HRMS-SPE-NMR) analysis and preparative-scale HPLC isolation led to identification of 21 metabolites from the three species, of which 16 were serrulatane-type diterpenoids (12 new) associated with either α-glucosidase and/or PTP1B inhibition. This is the first report of serrulatane-type diterpenoids as potential α-glucosidase and/or PTP1B inhibitors.
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Affiliation(s)
- Sileshi G Wubshet
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Yousof Tahtah
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Allison M Heskes
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen , Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
- Center for Synthetic Biology "bioSYNergy", University of Copenhagen , Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Kenneth T Kongstad
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Irini Pateraki
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen , Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
- Center for Synthetic Biology "bioSYNergy", University of Copenhagen , Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Björn Hamberger
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen , Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
- Center for Synthetic Biology "bioSYNergy", University of Copenhagen , Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Birger L Møller
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, University of Copenhagen , Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
- Center for Synthetic Biology "bioSYNergy", University of Copenhagen , Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Dan Staerk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen, Denmark
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Li F, Gao J, Xue F, Yu X, Shao T. Extraction Optimization, Purification and Physicochemical Properties of Polysaccharides from Gynura medica. Molecules 2016; 21:397. [PMID: 27023496 PMCID: PMC6273717 DOI: 10.3390/molecules21040397] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 03/18/2016] [Accepted: 03/18/2016] [Indexed: 12/03/2022] Open
Abstract
Extraction of polysaccharides from Gynura medica (GMPs) was optimized by response surface methodology (RSM). A central composition design including three parameters, namely extraction temperature (X1), ratio of water to raw material (X2) and extraction time (X3), was used. The best conditions were extraction temperature of 91.7 °C, extraction time of 4.06 h and ratio of water to raw material of 29.1 mL/g. Under the optimized conditions, the yield of GMPs was 5.56%, which was similar to the predicted polysaccharides yield of 5.66%. A fraction named GMP-1 was obtained after isolation and purification by DEAE-52 and Sephadex G-100 gel chromatography, respectively. GMP-1, with a molecular weight of 401 kDa, mainly consisted of galacturonic acid (GalA), xylose (Xyl), glucose (Glu). Infrared spectroscopy was used to characterize the major functional groups of GMP-1 and the results indicated that it was an acidic polysaccharide. The antioxidant and α-glucosidase inhibitory activities of GMPs and GMP-1 were determined in vitro. The results indicated that GMPs and GMP-1 show potential for use in functional foods or medicines.
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Affiliation(s)
- Fengwei Li
- College of Prataculture Science, Nanjing Agricultural University, Nanjing 210095, China.
- School of Marine and Bioengineering, Yan Cheng Institute of Technology, Yan Cheng 224051, China.
| | - Jian Gao
- School of Marine and Bioengineering, Yan Cheng Institute of Technology, Yan Cheng 224051, China.
| | - Feng Xue
- School of Marine and Bioengineering, Yan Cheng Institute of Technology, Yan Cheng 224051, China.
| | - Xiaohong Yu
- School of Marine and Bioengineering, Yan Cheng Institute of Technology, Yan Cheng 224051, China.
| | - Tao Shao
- College of Prataculture Science, Nanjing Agricultural University, Nanjing 210095, China.
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Sivasothy Y, Loo KY, Leong KH, Litaudon M, Awang K. A potent alpha-glucosidase inhibitor from Myristica cinnamomea King. Phytochemistry 2016; 122:265-269. [PMID: 26712615 DOI: 10.1016/j.phytochem.2015.12.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 12/01/2015] [Accepted: 12/14/2015] [Indexed: 06/05/2023]
Abstract
A dimeric acylphenol and a potent α-glucosidase inhibitor, giganteone D (IC50 5.05μM), was isolated and characterized from the bark of Myristica cinnamomea King. The bark also yielded an acylphenol with an unprecedented skeleton for which the name cinnamomeone A (IC50 358.80μM) was proposed. Their structures were established by means of NMR and MS spectrometric analyses. The Lineweaver-Burk plot of giganteone D indicated that it was a mixed-type inhibitor. This is the first report on the α-glucosidase inhibiting potential of acylphenols.
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Affiliation(s)
- Yasodha Sivasothy
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Kong Yong Loo
- Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Kok Hoong Leong
- Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Marc Litaudon
- Institut de Chimie des Substances Naturelles, Centre National de la Recherche Scientifique, 91198 Gif-sur-Yvette Cedex, France
| | - Khalijah Awang
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
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Johnson OO, Zhao M, Gunn J, Santarsiero BD, Yin ZQ, Ayoola GA, Coker HAB, Che CT. α-Glucosidase Inhibitory Prenylated Anthranols from Harungana madagascariensis. J Nat Prod 2016; 79:224-229. [PMID: 26727375 DOI: 10.1021/acs.jnatprod.5b00924] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Four new prenylated anthranols, harunganols C-F (1-4), along with kenganthranol A (5), harunganin (6), and ferruginin A (7), were identified from the leaves of Harungana madagascariensis. The structures of compounds 2, 5, and 7 were confirmed by single-crystal X-ray diffraction analysis. Compound 1 is a unique symmetrical anthranol dimer connected via a CH2 group. Compound 4 possesses a unique C-10 hemiketal group. All anthranols were evaluated for their α-glucosidase inhibitory activities. They displayed a higher potency compared to acarbose except for 3 and 4. In particular, harunganol C (1) showed an IC50 value of 1.2 μM.
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Affiliation(s)
- Oluwatosin O Johnson
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Lagos , CMUL Campus, Lagos 100254, Nigeria
| | - Ming Zhao
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
| | - Jordan Gunn
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
| | - Bernard D Santarsiero
- Center for Pharmaceutical Biotechnology and Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Zhi-Qi Yin
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
- Department of Natural Medicinal Chemistry & State Key Laboratory of Natural Medicines, China Pharmaceutical University , Nanjing 210009, People's Republic of China
| | - Gloria A Ayoola
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Lagos , CMUL Campus, Lagos 100254, Nigeria
| | - H A B Coker
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Lagos , CMUL Campus, Lagos 100254, Nigeria
| | - Chun-Tao Che
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago , Chicago, Illinois 60612, United States
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Oboh G, Agunloye OM, Adefegha SA, Akinyemi AJ, Ademiluyi AO. Caffeic and chlorogenic acids inhibit key enzymes linked to type 2 diabetes (in vitro): a comparative study. J Basic Clin Physiol Pharmacol 2015; 26:165-70. [PMID: 24825096 DOI: 10.1515/jbcpp-2013-0141] [Citation(s) in RCA: 158] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 04/01/2014] [Indexed: 11/15/2022]
Abstract
BACKGROUND Chlorogenic acid is a major phenolic compound that forms a substantial part of plant foods and is an ester of caffeic acid and quinic acid. However, the effect of the structures of both chlorogenic and caffeic acids on their antioxidant and antidiabetic potentials have not been fully understood. Thus, this study sought to investigate and compare the interaction of caffeic acid and chlorogenic acid with α-amylase and α-glucosidase (key enzymes linked to type 2 diabetes) activities in vitro. METHODS The inhibitory effect of the phenolic acids on α-amylase and α-glucosidase activities was evaluated. Thereafter, their antioxidant activities as typified by their 1,1-diphenyl-2 picrylhydrazyl radical scavenging ability and ferric reducing antioxidant properties were determined. RESULTS The results revealed that both phenolic acids inhibited α-amylase and α-glucosidase activities in a dose-dependent manner (2-8 μg/mL). However, caffeic acid had a significantly (p<0.05) higher inhibitory effect on α-amylase [IC50 (concentration of sample causing 50% enzyme inhibition)=3.68 μg/mL] and α-glucosidase (IC50=4.98 μg/mL) activities than chlorogenic acid (α-amylase IC50=9.10 μg/mL and α-glucosidase IC50=9.24 μg/mL). Furthermore, both phenolic acids exhibited high antioxidant properties, with caffeic acid showing higher effects. CONCLUSIONS The esterification of caffeic acid with quinic acid, producing chlorogenic acid, reduces their ability to inhibit α-amylase and α-glucosidase activities. Thus, the inhibition of α-amylase and α-glucosidase activities by the phenolic acids could be part of the possible mechanism by which the phenolic acids exert their antidiabetic effects.
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Wubshet SG, Brighente IMC, Moaddel R, Staerk D. Magnetic Ligand Fishing as a Targeting Tool for HPLC-HRMS-SPE-NMR: α-Glucosidase Inhibitory Ligands and Alkylresorcinol Glycosides from Eugenia catharinae. J Nat Prod 2015; 78:2657-2665. [PMID: 26496505 PMCID: PMC5036580 DOI: 10.1021/acs.jnatprod.5b00603] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A bioanalytical platform combining magnetic ligand fishing for α-glucosidase inhibition profiling and HPLC-HRMS-SPE-NMR for structural identification of α-glucosidase inhibitory ligands, both directly from crude plant extracts, is presented. Magnetic beads with N-terminus-coupled α-glucosidase were synthesized and characterized for their inherent catalytic activity. Ligand fishing with the immobilized enzyme was optimized using an artificial test mixture consisting of caffeine, ferulic acid, and luteolin before proof-of-concept with the crude extract of Eugenia catharinae. The combination of ligand fishing and HPLC-HRMS-SPE-NMR identified myricetin 3-O-α-L-rhamnopyranoside, myricetin, quercetin, and kaempferol as α-glucosidase inhibitory ligands in E. catharinae. Furthermore, HPLC-HRMS-SPE-NMR analysis led to identification of six new alkylresorcinol glycosides, i.e., 5-(2-oxopentyl)resorcinol 4-O-β-D-glucopyranoside, 5-propylresorcinol 4-O-β-D-glucopyranoside, 5-pentylresorcinol 4-O-[α-D-apiofuranosyl-(1→6)]-β-D-glucopyranoside, 5-pentylresorcinol 4-O-β-D-glucopyranoside, 4-hydroxy-3-O-methyl-5-pentylresorcinol 1-O-β-D-glucopyranoside, and 3-O-methyl-5-pentylresorcinol 1-O-[β-D-glucopyranosyl-(1→6)]-β-D-glucopyranoside.
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Affiliation(s)
- Sileshi G. Wubshet
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Inês M. C. Brighente
- Laboratório de Química de Produtos Naturais, Departamento de Química, Universidade Federal de Santa Catarina, Campus Trindade, Florianópolis-SC, 88040-900, Brazil
| | - Ruin Moaddel
- Biomedical Research Center, National Institute on Aging, National Institutes of Health, 251 Bayview Boulevard, Baltimore, Maryland 21224, United States
| | - Dan Staerk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
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45
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Farag MA, Sakna ST, El-Fiky NM, Shabana MM, Wessjohann LA. Phytochemical, antioxidant and antidiabetic evaluation of eight Bauhinia L. species from Egypt using UHPLC-PDA-qTOF-MS and chemometrics. Phytochemistry 2015; 119:41-50. [PMID: 26410474 DOI: 10.1016/j.phytochem.2015.09.004] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 08/06/2015] [Accepted: 09/08/2015] [Indexed: 06/05/2023]
Abstract
Bauhinia L. (Fabaceae) comprises ca. 300-350 plant species, many of which are traditionally used in folk medicine for their antidiabetic, antioxidant and anti-inflammatory effects. Bauhinia s.l. recently has been subdivided into 9 genera based on phylogenetic data: Bauhinia s.str., Barklya, Brenierea, Gigasiphon, Lysiphyllum, Phanera, Piliostigma, Schnella (American Phanera) and Tylosema. The aerial parts of 8 species corresponding to 5 genera were analyzed: Bauhinia forficata, Bauhinia variegata, B. variegata var. candida, Bauhinia galpinii, Schnella glabra, Piliostigma racemosa, Phanera vahlii and Lysiphyllum hookeri. Leaves and shoots were subjected to metabolite profiling via UHPLC-PDA-qTOF-MS coupled to multivariate data analyzes to identify compound compositional differences. A total of 90 metabolites were identified including polyphenols and fatty acids; flavonoid conjugates accounted for most of the metabolite variation observed. This study provides a comprehensive map of polyphenol composition in Bauhinia and phytochemical species aggregations are consistent with recent Bauhinia genus taxonomic relationship derived from phylogenetic studies. DPPH radical scavenging and α-glucosidase inhibitory assays were also performed to assess selected aspects of the antioxidant and antidiabetic potential for the examined species with respect to metabolite profiles.
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Affiliation(s)
- Mohamed A Farag
- Pharmacognosy Department, College of Pharmacy, Cairo University, 11562 Cairo, Egypt.
| | - Sarah T Sakna
- Pharmacognosy Department, College of Pharmacy, Cairo University, 11562 Cairo, Egypt
| | - Nabaweya M El-Fiky
- Pharmacognosy Department, College of Pharmacy, Cairo University, 11562 Cairo, Egypt
| | - Marawan M Shabana
- Pharmacognosy Department, College of Pharmacy, Cairo University, 11562 Cairo, Egypt
| | - Ludger A Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, 06120 Halle (Saale), Germany
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Wu P, Zheng J, Huang T, Li D, Hu Q, Cheng A, Jiang Z, Jiao L, Zhao S, Zhang K. Synthesis and Evaluation of Novel Triterpene Analogues of Ursolic Acid as Potential Antidiabetic Agent. PLoS One 2015; 10:e0138767. [PMID: 26406581 PMCID: PMC4583267 DOI: 10.1371/journal.pone.0138767] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Accepted: 09/03/2015] [Indexed: 11/28/2022] Open
Abstract
Ursolic acid (UA) is a naturally bioactive compound that possesses potential anti-diabetic activity. The relatively safe and effective molecule intrigued us to further explore and to improve its anti-diabetic activity. In the present study, a series of novel UA analogues was synthesized and their structures were characterized. Their bioactivities against the α-glucosidase from baker's yeast were determined in vitro. The results suggested that most of the analogues exhibited significant inhibitory activity, especially analogues 8b and 9b with the IC50 values of 1.27 ± 0.27 μM (8b) and 1.28 ± 0.27 μM (9b), which were lower than the other analogues and the positive control. The molecular docking and 2D-QSAR studies were carried out to prove that the C-3 hydroxyl could interact with the hydrophobic region of the active pocket and form hydrogen bonds to increase the binding affinity of ligand and the homology modelling protein. Thus, these results will be helpful for understanding the relationship between binding mode and bioactivity and for designing better inhibitors from UA analogues.
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Affiliation(s)
- Panpan Wu
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Jie Zheng
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Tianming Huang
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Dianmeng Li
- Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, China
| | - Qingqing Hu
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Anming Cheng
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Zhengyun Jiang
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Luoying Jiao
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Suqing Zhao
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
| | - Kun Zhang
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
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Liu Y, Yang Q, Xia G, Huang H, Li H, Ma L, Lu Y, He L, Xia X, She Z. Polyketides with α-Glucosidase Inhibitory Activity from a Mangrove Endophytic Fungus, Penicillium sp. HN29-3B1. J Nat Prod 2015; 78:1816-1822. [PMID: 26230970 DOI: 10.1021/np500885f] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Five new compounds, pinazaphilones A and B (1, 2), two phenolic compounds (4, 5), and penicidone D (6), together with the known Sch 1385568 (3), (±)-penifupyrone (7), 3-O-methylfunicone (8), 5-methylbenzene-1,3-diol (9), and 2,4-dihydroxy-6-methylbenzoic acid (10) were obtained from the culture of the endophytic fungus Penicillium sp. HN29-3B1, which was isolated from a fresh branch of the mangrove plant Cerbera manghas collected from the South China Sea. Their structures were determined by analysis of 1D and 2D NMR and mass spectroscopic data. Structures of compounds 4 and 7 were further confirmed by a single-crystal X-ray diffraction experiment using Cu Kα radiation. The absolute configurations of compounds 1-3 were assigned by quantum chemical calculations of the electronic circular dichroic spectra. Compounds 2, 3, 5, and 7 inhibited α-glucosidase with IC50 values of 28.0, 16.6, 2.2, and 14.4 μM, respectively, and are thus more potent than the positive control, acarbose.
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Affiliation(s)
| | - Qin Yang
- Chinese Center for Chirality, Key Laboratory of Medicinal Chemistry and Molecular Diagnostics of Education Ministry of China, Hebei University , Baoding, 071002, People's Republic of China
| | | | | | | | | | | | | | - Xuekui Xia
- Key Laboratory for Applied Microbiology of Shandong Province, Biotechnology Center of Shandong Academy of Sciences , Jinan 250014, People's Republic of China
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Wang K, Bao L, Xiong W, Ma K, Han J, Wang W, Yin W, Liu H. Lanostane Triterpenes from the Tibetan Medicinal Mushroom Ganoderma leucocontextum and Their Inhibitory Effects on HMG-CoA Reductase and α-Glucosidase. J Nat Prod 2015; 78:1977-89. [PMID: 26287401 DOI: 10.1021/acs.jnatprod.5b00331] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Sixteen new lanostane triterpenes, ganoleucoins A-P (1-16), together with 10 known tripterpenes (17-26), were isolated from the cultivated fruiting bodies of Ganoderma leucocontextum, a new member of the Ganoderma lucidum complex. The structures of the new compounds were elucidated by extensive spectroscopic analysis and chemical transformation. The inhibitory effects of 1-26 on HMG-CoA reductase and α-glucosidase were tested in vitro. Compounds 1, 3, 6, 10-14, 17, 18, 23, 25, and 26 showed much stronger inhibitory activity against HMG-CoA reductase than the positive control atorvastatin. Compounds 13, 14, and 16 presented potent inhibitory activity against α-glucosidase from yeast with IC₅₀ values of 13.6, 2.5, and 5.9 μM, respectively. In addition, the cytotoxicity of 1-26 was evaluated against the K562 and PC-3 cell lines by the MTT assay. Compounds 1, 2, 6, 7, 10, 12, 16, 18, and 25 exhibited cytotoxicity against K562 cells with IC₅₀ values in the range 10-20 μM. Paclitaxel was used as the positive control with an IC₅₀ value of 0.9 μM. This is the first report of secondary metabolites from this medicinal mushroom.
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Affiliation(s)
- Kai Wang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences , No. 1 Beichenxi Road, Chaoyang District, Beijing 100101, People's Republic of China
- University of Chinese Academy of Sciences , Beijing 100049, People's Republic of China
| | - Li Bao
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences , No. 1 Beichenxi Road, Chaoyang District, Beijing 100101, People's Republic of China
| | - Weiping Xiong
- Institute of Vegetable Research, Tibet Academy of Agriculture and Animal Science , No. 157 Jinzhuxi Road, Lasa 850000, People's Republic of China
| | - Ke Ma
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences , No. 1 Beichenxi Road, Chaoyang District, Beijing 100101, People's Republic of China
| | - Junjie Han
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences , No. 1 Beichenxi Road, Chaoyang District, Beijing 100101, People's Republic of China
| | - Wenzhao Wang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences , No. 1 Beichenxi Road, Chaoyang District, Beijing 100101, People's Republic of China
| | - Wenbing Yin
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences , No. 1 Beichenxi Road, Chaoyang District, Beijing 100101, People's Republic of China
| | - Hongwei Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences , No. 1 Beichenxi Road, Chaoyang District, Beijing 100101, People's Republic of China
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Wubshet SG, Moresco HH, Tahtah Y, Brighente IMC, Staerk D. High-resolution bioactivity profiling combined with HPLC-HRMS-SPE-NMR: α-Glucosidase inhibitors and acetylated ellagic acid rhamnosides from Myrcia palustris DC. (Myrtaceae). Phytochemistry 2015; 116:246-252. [PMID: 25935545 DOI: 10.1016/j.phytochem.2015.04.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 04/14/2015] [Accepted: 04/16/2015] [Indexed: 05/27/2023]
Abstract
Type 2 diabetes (T2D) is an endocrine metabolic disease with a worldwide prevalence of more than 8%, and an expected increase close to 50% in the next 15-20years. T2D is associated with severe and life-threatening complications like retinopathy, neuropathy, nephropathy, and cardiovascular diseases, and therefore improved drug leads or functional foods containing α-glucosidase inhibitors are needed for management of blood glucose. In this study, leaves of Myrcia palustris were investigated by high-resolution α-glucosidase inhibition profiling combined with HPLC-HRMS-SPE-NMR. This led to identification of casuarinin, myricetin 3-O-β-d-(6″-galloyl)galactopyranoside, kaempferol 3-O-β-d-galactopyranoside, myricetin, and quercetin as α-glucosidase inhibitors. In addition, four acetylated ellagic acid rhamnosides, i.e., 4-O-(2″,4″-O-diacetyl-α-l-rhamnopyranosyl)ellagic acid, 4-O-(2″,3″-O-diacetyl-α-l-rhamnopyranosyl)ellagic acid, 4-O-(3″,4″-O-diacetyl-α-l-rhamnopyranosyl)ellagic acid, and 4-O-(2″,3″,4″-O-triacetyl-α-l-rhamnopyranosyl)ellagic acid were identified.
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Affiliation(s)
- Sileshi G Wubshet
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Henrique H Moresco
- Laboratório de Química de Produtos Naturais, Departamento de Química, Universidade Federal de Santa Catarina, Campus Trindade, Florianópolis, SC 88040-900, Brazil
| | - Yousof Tahtah
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Inês M C Brighente
- Laboratório de Química de Produtos Naturais, Departamento de Química, Universidade Federal de Santa Catarina, Campus Trindade, Florianópolis, SC 88040-900, Brazil
| | - Dan Staerk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark.
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50
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Telagari M, Hullatti K. In-vitro α-amylase and α-glucosidase inhibitory activity of Adiantum caudatum Linn. and Celosia argentea Linn. extracts and fractions. Indian J Pharmacol 2015; 47:425-429. [PMID: 26288477 DOI: 10.4103/2f0253-7613.161270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 06/11/2015] [Accepted: 06/26/2015] [Indexed: 05/28/2023] Open
Abstract
OBJECTIVE The objective of the present study was to provide an in-vitro evidence for the potential inhibitory activity of extracts and fractions of Adiantum caudatum Linn. and Celosia argentea Linn. on α-amylase and α-glucosidase enzymes. MATERIALS AND METHODS The plant extracts were prepared, first with cold maceration (70% v/v ethanol) and then by Soxhlation techniques (95% v/v ethanol). Subsequently, the combined extracts were subjected for fractionation. Different concentrations (0.1, 0.2, 0.3, 0.4, and 0.5 mg/ml) of extract and fractions were subjected to α-amylase and α-glucosidase inhibitory assay. The absorbance was measured at 540 and 405 nm using multiplate reader and the percentage of α- amylase and α- glucosidase inhibitory activity and IC₅₀ values of extract and fractions were calculated. RESULTS Fraction 2 of A. caudatum and fraction 4 of C. argentea has shown highest α-amylase and α-glucosidase inhibitory potential with IC₅₀ values of 0.241, 0.211 and 0.294, 0.249 mg/ml, respectively, which was comparable with acarbose (0.125 and 0.93 mg/ml). Whereas, extracts and remaining fractions of both the plants have shown lesser activity. CONCLUSION The results of the present study indicate that, fraction 2 of A. caudatum, rich in triterpenoids and phenolics and fraction 4 of C. argentea, rich in flavonoids, are effective α- amylase and α- glucosidase inhibitors, which may be helpful to reduce the postprandial glucose levels. Hence, further studies may throw light on the antidiabetic potential of A. caudatum and C. argentea, especially in the management of type 2 diabetes.
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Affiliation(s)
- Madhusudhan Telagari
- Department of Pharmacognosy, KLES College of Pharmacy, Belagavi, Karnataka, India
| | - Kirankumar Hullatti
- Department of Pharmacognosy, KLES College of Pharmacy, Belagavi, Karnataka, India
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