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Fei Z, Xu Y, Zhang G, Liu Y, Li H, Chen L. Natural products with potential hypoglycemic activity in T2DM: 2019-2023. PHYTOCHEMISTRY 2024; 223:114130. [PMID: 38714289 DOI: 10.1016/j.phytochem.2024.114130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 04/22/2024] [Accepted: 05/02/2024] [Indexed: 05/09/2024]
Abstract
As currently the most common metabolic disease, type 2 diabetes mellitus (T2DM) has shown a continuous increase in the number of patients in recent decades. Most anti-T2DM drugs tend to cause some side effects. Given the pathogenesis of T2DM, natural products have emerged as an important source of anti-T2DM drugs. This article reviews natural products with potential hypoglycemic activity from 2019 to 2023. A total of 200 previously natural products were discovered on SciFinder, PubMed and Web of Science. These products were categorized based on their structural frameworks and their biological activities were summarized. Although the mechanisms of action of most compounds are unclear, these compounds could still serve as candidates for the development of lead compounds. Therefore, further structure and activity research of natural products will significantly contribute to the development of potential anti-T2DM drugs.
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Affiliation(s)
- Zhang Fei
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Yang Xu
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Guoyu Zhang
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Yang Liu
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Hua Li
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China; Institute of Structural Pharmacology & TCM Chemical Biology, Fujian Key Laboratory of Chinese Materia Medica, College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou, 350122, China.
| | - Lixia Chen
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China.
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Van PCP, Ngo Van H, Quang MB, Duong Thanh N, Nguyen Van D, Thanh TD, Tran Minh N, Thi Thu HN, Quang TN, Thao Do T, Thanh LP, Do Thi Thu H, Le Tuan AH. Stigmastane-type steroid saponins from the leaves of Vernonia amygdalina and their α-glucosidase and xanthine oxidase inhibitory activities. Nat Prod Res 2024; 38:601-606. [PMID: 36924396 DOI: 10.1080/14786419.2023.2188589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 03/02/2023] [Indexed: 03/18/2023]
Abstract
Two new vernonioside K (1) and vernonioside L (2) and four known Δ7,9(11) stigmastane-type steroidal saponins-vernonioside B2 (3), vernoniacum B (4), vernonioside B1 (5), and vernoamyoside A (6)-were isolated from the leaves of Vernonia amygdalina. Their structures were determined by comprehensive spectroscopic analysis with one-dimensional nuclear magnetic resonance, two-dimensional nuclear magnetic resonance, and high-resolution mass spectrometry. All isolated compounds (1-6) were evaluated to determine their inhibitory effects on α-glucosidase and xanthine oxidase. Among them, two new compounds 1 and 2 showed significant inhibition of α-glucosidase with IC50 values of 78.56 ± 7.28 and 14.74 ± 1.57 (μM), respectively, comparable with acarbose as a positive control (127.53 ± 1.73 μM); none of these compounds inhibited xanthine oxidase activity. Compounds 1 and 2 are promising candidates for the development of antidiabetic agents from natural sources.
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Affiliation(s)
- PCong Pham Van
- Vietnam Academy of Science and Technology (VAST), Graduate University of Science and Technology, Hanoi, Vietnam
- Center for Research and Technology Transfer, VAST, Hanoi, Vietnam
| | - Hieu Ngo Van
- Vietnam Academy of Science and Technology (VAST), Graduate University of Science and Technology, Hanoi, Vietnam
- Center for Research and Technology Transfer, VAST, Hanoi, Vietnam
| | - Minh Bui Quang
- Center for Research and Technology Transfer, VAST, Hanoi, Vietnam
| | - Nam Duong Thanh
- Center for Research and Technology Transfer, VAST, Hanoi, Vietnam
| | - Dan Nguyen Van
- Center for Research and Technology Transfer, VAST, Hanoi, Vietnam
| | - Tuan Do Thanh
- Thai Binh University of Medicine and Pharmacy, Thai Binh City, Thai Binh, Vietnam
| | - Ngoc Tran Minh
- Traditional medicinal administration, Ministry of Health, Ba Dinh, Hanoi, Vietnam
| | | | | | - Thi Thao Do
- Institute of Biotechnology, VAST, Cau Giay, Hanoi, Vietnam
| | | | - Hien Do Thi Thu
- Vietnam Academy of Science and Technology (VAST), Graduate University of Science and Technology, Hanoi, Vietnam
- Center for Research and Technology Transfer, VAST, Hanoi, Vietnam
| | - Anh Hoang Le Tuan
- Vietnam Academy of Science and Technology (VAST), Graduate University of Science and Technology, Hanoi, Vietnam
- Center for Research and Technology Transfer, VAST, Hanoi, Vietnam
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Sinze Metiave AA, Tedonkeu AT, Tamokou JDD, Nanfack ARD, Matsuete-Takongmo G, Kamtcha Wetadieu D, Tsopmo A, Tene M. Antibacterial stigmastane-type steroids and other constituents from the leaves of Vernonia glabra (Steetz) Vatke (Asteraceae). Nat Prod Res 2023:1-15. [PMID: 37955140 DOI: 10.1080/14786419.2023.2278756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 10/25/2023] [Indexed: 11/14/2023]
Abstract
Two new stigmastane steroids (1 and 2) were isolated from the methanol extract of the leaves of Vernonia glabra, together with seventeen known compounds (3-19) including one fatty acid, four triterpenoids, four steroids, one trinitropropanoyl glucoside, and seven flavonoids. The structures of compounds 1 and 2 were assigned based on their IR, NMR and MS data, and by comparison with literature values. The MeOH extract, its fractions and isolated compounds were subjected to in vitro antibacterial assay against two Gram-positive (Staphylococcus aureus ATCC25923 and Streptococcus pneumoniae ATCC49619) and two Gram-negative (Escherichia coli ATCC8739 and Klebsiella pneumoniae ATCC10031) bacteria, using broth microdilution method. The extract and fractions exhibited (16 ≤ MIC ≤ 512 μg/mL) antibacterial activities. The isolated and tested compounds were also active (16 ≤ MIC ≤ 128 μg/mL) against the four pathogenic bacteria, with compound 2 being the most active and E. coli, the most sensitive microorganism.
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Affiliation(s)
- Audrey A Sinze Metiave
- Natural Products Chemistry Research Unit, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Alex Tchinda Tedonkeu
- Natural Products Chemistry Research Unit, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Jean-De-Dieu Tamokou
- Research Unit of Microbiology and Antimicrobial Substances, Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Arno R Donfack Nanfack
- Natural Products Chemistry Research Unit, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Germaine Matsuete-Takongmo
- Research Unit of Microbiology and Antimicrobial Substances, Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Duplex Kamtcha Wetadieu
- Natural Products Chemistry Research Unit, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Apollinaire Tsopmo
- Food Science Program, Department of Chemistry, and Institute of Biochemistry, Carleton University, Ottawa, Canada
| | - Mathieu Tene
- Natural Products Chemistry Research Unit, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
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Tseme Wandji N, Bitchagno GTM, Mawabo Kamga I, Tchamgoue J, Nkenfou CN, Lenta BN, Sewald N, Kouam SF. Polyoxygenated Stigmastane-Type Steroids from Vernonia kotschyana Sch. Bip. ex Walp. and Their Chemophenetic Significance. Molecules 2023; 28:5278. [PMID: 37446939 DOI: 10.3390/molecules28135278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/30/2023] [Accepted: 07/02/2023] [Indexed: 07/15/2023] Open
Abstract
Four polyoxygenated stigmastanes (1-4) alongside known analogues (7-8) and flavonoids (5-6) were isolated from a dichloromethane/methanol (1:1, v/v) extract of the whole plant of Vernonia kotschyana Sch. Bip. ex Walp. (Asteraceae). Their structures were determined by means of spectroscopic and spectrometric analysis. The relative stereochemistry of the new compounds was established and confirmed via biosynthesis evidence and cyclization of 1 under acidic conditions. A plausible biosynthetic pathway to the new compounds and the chemophenetic significance of the isolated constituents were also discussed. The crude extract, fractions, and compounds (1-3) were assessed for their antibacterial activity against five highly prevalent bacterial strains. The fractions and compounds showed low to moderate activity with minimal inhibitory concentrations (MICs) > 125 µg/mL.
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Affiliation(s)
- Nadine Tseme Wandji
- Department of Chemistry, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, Yaounde P.O. Box 812, Cameroon
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
| | - Gabin Thierry M Bitchagno
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
- Department of Chemistry, University of Dschang, Dschang P.O. Box 67, Cameroon
| | - Isabelle Mawabo Kamga
- Department of Biology, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
| | - Joseph Tchamgoue
- Department of Chemistry, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, Yaounde P.O. Box 812, Cameroon
| | - Celine Nguefeu Nkenfou
- Department of Biology, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
- Molecular Biology Center, Yaounde P.O. Box 14495, Cameroon
| | - Bruno Ndjakou Lenta
- Department of Chemistry, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
| | - Norbert Sewald
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
| | - Simeon Fogue Kouam
- Department of Chemistry, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
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Identification of promising multi-targeting inhibitors of obesity from Vernonia amygdalina through computational analysis. Mol Divers 2023; 27:1-25. [PMID: 35179699 DOI: 10.1007/s11030-022-10397-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Accepted: 01/24/2022] [Indexed: 02/08/2023]
Abstract
Vernonia amygdalina, a widely consumed West African food herb, can be a boon in the discovery of safe anti-obesity agents given the extensive reports on its anti-obesity and antidiabetic potentials. The main aim of this study was to screen 78 Vernonia-Derived Phytocompounds (VDPs) against the active site regions of Human Pancreatic Lipase (HPL), Human Pancreatic Amylase and Human Glucosidase (HG) as drug targets associated with obesity in silico. Structure-based virtual screening helped to identify Luteolin 7-O-glucuronoside and Andrographidoid D2 as hit compounds with dual targeting tendency towards the HPL and HG. Analysis of the molecular dynamic simulation trajectory files of the ligand-receptor complexes as computed from the thermodynamic parameters plots showed not only increased flexibility and greater interaction potential of the active site residues of the receptor towards the VDPs as indicated by the root mean square fluctuation but also higher stability as indicated by the root mean square deviation, radius of gyration and number of hydrogen bonds. The cluster analysis further showed that the interactions with important residues were preserved in the dynamic environment. These observations were further verified from Molecular Mechanics Generalized Born Surface Area Analysis, which also showed that residual contributions to the binding free energies were mainly from catalytic residues at the active sites of the enzymes. The hit compounds also feature desirable physicochemical properties and drug-likeness. This study provides in silico evidence for the inhibitory potential of phytochemicals from Vernonia amygdalina against two target enzymes in obesity.
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Liu X, Zhou M, He S, Xu Q, Du C, Zhu H, Lin T, Wang G, Tian W, Chen H. Polyhydric Stigmastane-Type Steroids Derivative from Vernonia amygdalina and Their Anti-Neuroinflammatory Activity. Pharmaceuticals (Basel) 2022; 15:ph15091160. [PMID: 36145381 PMCID: PMC9506346 DOI: 10.3390/ph15091160] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/15/2022] [Accepted: 09/15/2022] [Indexed: 11/27/2022] Open
Abstract
Vernonia amygdalina Del. is a traditional medicinal plant and vegetable originating from tropical Africa. The phytochemical investigation of V. amygdalina led to eight undescribed polyhydric stigmastane-type steroids, vernonin M–T (1–8). Their gross structures and stereochemistry were elucidated by HR-ESI-MS, 1D and 2D NMR spectra, X-ray diffraction, quantum chemical computation of the ECD spectrum, and the in situ dimolybdenum CD method. The anti-neuroinflammatory activity of the isolated compounds was performed in BV-2 microglia cells. As a result, compound 1 displayed a notable anti-neuroinflammatory effect via suppressing the LPS-induced IκB degradation and restricting the activation of the PI3K/AKT and p38 MAPK pathways.
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Liu X, Yang R, Xu Q, Zhou M, Feng J, Wang G, Lin T, Tian W, Chen H. Tautomeric phytosterols from Vernonia amygdalina Delile and their anti-cervical cancer activity. Bioorg Chem 2022; 128:106068. [PMID: 35933896 DOI: 10.1016/j.bioorg.2022.106068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 07/26/2022] [Accepted: 07/28/2022] [Indexed: 11/02/2022]
Abstract
Vernonia amygdalina Delile is generally used as green vegetables for cuisine in Nigeria and health tea or products in southeast of china. It was also used as folk medicine for the treatment of anti-helminth, febrifuge, digestive tonic and wounds. In this study, eleven undescribed phytosterols (1-2, 4-12) and six known analogues (3, 13-17) were isolated from the stems of V. amygdalina. Their structures including absolute configurations were elucidated by comprehensive spectroscopic methods (1D and 2D NMR, HRESIMS), X-ray diffraction and comparison of their ECD spectra. Besides, the tautomerism of phytosterols (1, 3-6, 12-17) with hemiacetal moiety were analyzed by solution NMR with different deuterated solvent and variable-temperature experiments. In addition, the cytotoxic activities of isolates against HeLa cells were evaluated. As a result, compound 10 exhibited the most potent anti-cervical cancer activity with the IC50 of 22.44 μM. Mechanism studies indicated that 10 triggered HeLa cells apoptosis through activating caspase signaling pathway. Furthermore, 10 could arrest the cell cycle in S phase and suppress the activation of the PI3K/AKT/mTOR pathway, leading to the inhibition of HeLa cells proliferation.
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Affiliation(s)
- Xiangzhong Liu
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, PR China
| | - Renjing Yang
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, PR China
| | - Qiannan Xu
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, PR China
| | - Mi Zhou
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, PR China
| | - Jie Feng
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, PR China
| | - Guanghui Wang
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, PR China
| | - Ting Lin
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, PR China.
| | - Wenjing Tian
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, PR China.
| | - Haifeng Chen
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, PR China.
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In Vitro Alpha-Glucosidase Inhibitory Activity and the Isolation of Luteolin from the Flower of Gymnanthemum amygdalinum (Delile) Sch. Bip ex Walp. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27072132. [PMID: 35408529 PMCID: PMC9000735 DOI: 10.3390/molecules27072132] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/21/2022] [Accepted: 03/23/2022] [Indexed: 11/24/2022]
Abstract
Diabetes mellitus is a major health issue that has posed a significant challenge over the years. Gymnanthemum amygdalinum is a well-known plant that can be potentially used to treat this disease. Therefore, this study aimed to evaluate the inhibitory effect of its root, stem bark, leaves, and flower extracts on alpha-glucosidase using an in vitro inhibition assay to isolate the bioactive compounds and determine their levels in the samples. The air-dried plant parts were extracted by maceration using methanol. The results showed that the flower extract had the greatest inhibitory effect (IC50 47.29 ± 1.12 µg/mL), followed by the leaves, roots, and stem bark. The methanolic flower extract was further fractionated with different solvents, and the ethyl acetate fraction showed the strongest activity (IC50 19.24 ± 0.12 µg/mL). Meanwhile, acarbose was used as a positive control (IC50 73.36 ± 3.05 µg/mL). Characterization based on UV, 1H-, and 13C-NMR established that the ethyl acetate fraction yielded two flavonoid compounds, namely, luteolin and 2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-3-methoxy-4H-chromen-4-on, which had IC50 values of 6.53 ± 0.16 µg/mL and 39.95 ± 1.59 µg/mL, respectively. The luteolin levels in the crude drug, methanolic extract, and ethyl acetate fraction were 3.4 ± 0.2 mg (0.3%), 32.4 ± 0.8 mg (3.2%), and 68.9 ± 3.4 mg (6.9%) per 1 g samples, respectively. These results indicated that the G. amygdalinum flower extract exerted potent inhibitory alpha-glucosidase activity.
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Van Cong P, Anh HLT, Trung NQ, Quang Minh B, Viet Duc N, Van Dan N, Trang NM, Phong NV, Vinh LB, Anh LT, Lee KY. Isolation, structural elucidation and molecular docking studies against SARS-CoV-2 main protease of new stigmastane-type steroidal glucosides isolated from the whole plants of Vernonia gratiosa. Nat Prod Res 2022:1-9. [DOI: 10.1080/14786419.2022.2042534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Pham Van Cong
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
- Graduate University of Science and Technology, VAST, Hanoi, Vietnam
| | - Hoang Le Tuan Anh
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
- Graduate University of Science and Technology, VAST, Hanoi, Vietnam
| | - Nguyen Quang Trung
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Bui Quang Minh
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Ngo Viet Duc
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Nguyen Van Dan
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Nguyen Minh Trang
- College of Pharmacy, Chungnam National University, Daejeon, Republic of Korea
| | - Nguyen Viet Phong
- Institute of Marine Biochemistry (IMBC), VAST, Hanoi, Vietnam
- College of Pharmacy, Kyungpook National University, Daegu, Republic of Korea
| | - Le Ba Vinh
- Institute of Marine Biochemistry (IMBC), VAST, Hanoi, Vietnam
- College of Pharmacy, Korea University, Sejong, Republic of Korea
| | - Le Tuan Anh
- Mientrung Institute for Scientific Research, VAST, Vietnam
| | - Ki Yong Lee
- College of Pharmacy, Korea University, Sejong, Republic of Korea
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Kasali FM, Kadima JN, Peter EL, Mtewa AG, Ajayi CO, Tusiimire J, Tolo CU, Ogwang PE, Weisheit A, Agaba AG. Antidiabetic Medicinal Plants Used in Democratic Republic of Congo: A Critical Review of Ethnopharmacology and Bioactivity Data. Front Pharmacol 2021; 12:757090. [PMID: 34776975 PMCID: PMC8579071 DOI: 10.3389/fphar.2021.757090] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 10/08/2021] [Indexed: 12/14/2022] Open
Abstract
Several studies have been conducted and published on medicinal plants used to manage Diabetes Mellitus worldwide. It is of great interest to review available studies from a country or a region to resort to similarities/discrepancies and data quality. Here, we examined data related to ethnopharmacology and bioactivity of antidiabetic plants used in the Democratic Republic of Congo. Data were extracted from Google Scholar, Medline/PubMed, Scopus, ScienceDirect, the Wiley Online Library, Web of Science, and other documents focusing on ethnopharmacology, pharmacology, and phytochemistry antidiabetic plants used in the Democratic Republic of Congo from 2005 to September 2021. The Kew Botanic Royal Garden and Plants of the World Online web databases were consulted to verify the taxonomic information. CAMARADES checklist was used to assess the quality of animal studies and Jadad scores for clinical trials. In total, 213 plant species belonging to 72 botanical families were reported. Only one plant, Droogmansia munamensis, is typically native to the DRC flora; 117 species are growing in the DRC and neighboring countries; 31 species are either introduced from other regions, and 64 are not specified. Alongside the treatment of Diabetes, about 78.13% of plants have multiple therapeutic uses, depending on the study sites. Experimental studies explored the antidiabetic activity of 133 plants, mainly in mice, rats, guinea pigs, and rabbits. Several chemical classes of antidiabetic compounds isolated from 67 plant species have been documented. Rare phase II clinical trials have been conducted. Critical issues included poor quality methodological protocols, author name incorrectly written (16.16%) or absent (14.25%) or confused with a synonym (4.69%), family name revised (17.26%) or missing (1.10%), voucher number not available 336(92.05%), ecological information not reported (49.59%). Most plant species have been identified and authenticated (89.32%). Hundreds of plants are used to treat Diabetes by traditional healers in DRC. However, most plants are not exclusively native to the local flora and have multiple therapeutic uses. The analysis showed the scarcity or absence of high-quality, in-depth pharmacological studies. There is a need to conduct further studies of locally specific species to fill the gap before their introduction into the national pharmacopeia.
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Affiliation(s)
- Félicien Mushagalusa Kasali
- Pharm-Bio Technology and Traditional Medicine Center, Mbarara University of Science and Technology, Mbarara, Uganda
- Department of Pharmacy, Faculty of Pharmaceutical Sciences and Public Health, Official University of Bukavu, Bukavu, Democratic Republic of Congo
- Department of Pharmacy, Faculty of Medicine, Mbarara University of Science and Technology, Mbarara, Uganda
| | - Justin Ntokamunda Kadima
- Department of Pharmacy, Faculty of Pharmaceutical Sciences and Public Health, Official University of Bukavu, Bukavu, Democratic Republic of Congo
- Department of Pharmacology, School of Medicine and Pharmacy, University of Rwanda, Huye, Rwanda
| | - Emanuel L. Peter
- Pharm-Bio Technology and Traditional Medicine Center, Mbarara University of Science and Technology, Mbarara, Uganda
- Department of Pharmacy, Faculty of Medicine, Mbarara University of Science and Technology, Mbarara, Uganda
- Department of Innovation, Technology Transfer and Commercialization, National Institute for Medical Research, Dar es Salaam, Tanzania
| | - Andrew G. Mtewa
- Pharm-Bio Technology and Traditional Medicine Center, Mbarara University of Science and Technology, Mbarara, Uganda
- Department of Pharmacy, Faculty of Medicine, Mbarara University of Science and Technology, Mbarara, Uganda
- Chemistry Section, Department of Applied Studies, Institute of Technology, Malawi University of Science and Technology, Limbe, Malawi
| | - Clement Olusoji Ajayi
- Pharm-Bio Technology and Traditional Medicine Center, Mbarara University of Science and Technology, Mbarara, Uganda
- Department of Pharmacy, Faculty of Medicine, Mbarara University of Science and Technology, Mbarara, Uganda
- Department of Pharmacognosy, Faculty of Pharmacy, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Jonans Tusiimire
- Department of Pharmacy, Faculty of Medicine, Mbarara University of Science and Technology, Mbarara, Uganda
| | - Casim Umba Tolo
- Pharm-Bio Technology and Traditional Medicine Center, Mbarara University of Science and Technology, Mbarara, Uganda
| | - Patrick Engeu Ogwang
- Pharm-Bio Technology and Traditional Medicine Center, Mbarara University of Science and Technology, Mbarara, Uganda
- Department of Pharmacy, Faculty of Medicine, Mbarara University of Science and Technology, Mbarara, Uganda
| | - Anke Weisheit
- Pharm-Bio Technology and Traditional Medicine Center, Mbarara University of Science and Technology, Mbarara, Uganda
| | - Amon Ganafa Agaba
- Department of Pharmacology and Therapeutics, Faculty of Medicine, Mbarara University of Science and Technology, Mbarara, Uganda
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Medjiofack Djeujo F, Cusinato F, Ragazzi E, Froldi G. α-Glucosidase and advanced glycation end products inhibition with Vernonia amygdalina root and leaf extracts: new data supporting the antidiabetic properties. J Pharm Pharmacol 2021; 73:1240-1249. [PMID: 33779755 DOI: 10.1093/jpp/rgab057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 03/11/2021] [Indexed: 12/17/2022]
Abstract
OBJECTIVE This study aims to investigate antidiabetic activity of several Vernonia amygdalina extracts to study their potential use in medicine. METHODS Aqueous and ethanol extracts were obtained by maceration and Soxhlet extraction from roots and leaves of V. amygdalina. The extracts were tested as inhibitors of α-glucosidase activity and of advanced glycation end products (AGEs) formation. Further, radical scavenging activity was examined detecting the oxygen radical absorbance capacity, while the potential cytotoxicity of extracts was estimated with MTT assay. KEY FINDINGS In aqueous and ethanol extracts, several polyphenolic compounds were identified; in detail, (-)-catechin and luteolin were found in leaf extracts, while caffeic acid, chlorogenic acid and the terpenoid vernodalol were recognized in root extracts. Regarding antidiabetic activity, the aqueous root extracts efficiently inhibited α-glucosidase activity in a concentration-dependent manner (IC50 = 5.6 µg/ml and 39.8 µg/ml, respectively of macerated and Soxhlet extracts), whereas those obtained from leaves exhibited lower potency. Furthermore, AGEs formation was reduced by all V. amygdalina extracts starting from 10 µg/ml. CONCLUSIONS The aqueous extracts of V. amygdalina roots obtained by maceration and Soxhlet extraction show remarkable anti-α-glucosidase activity, and all extracts have favourable antiglycation and antioxidant activities.
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Affiliation(s)
| | - Federico Cusinato
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Eugenio Ragazzi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Guglielmina Froldi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
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12
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Marahatha R, Gyawali K, Sharma K, Gyawali N, Tandan P, Adhikari A, Timilsina G, Bhattarai S, Lamichhane G, Acharya A, Pathak I, Devkota HP, Parajuli N. Pharmacologic activities of phytosteroids in inflammatory diseases: Mechanism of action and therapeutic potentials. Phytother Res 2021; 35:5103-5124. [PMID: 33957012 DOI: 10.1002/ptr.7138] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 04/05/2021] [Accepted: 04/10/2021] [Indexed: 12/13/2022]
Abstract
Natural products and their derivatives are known to be useful for treating numerous diseases since ancient times. Because of their high therapeutic potentials, the use of different medicinal plants is possible to treat varied inflammation-mediated chronic diseases. Among natural products, phytosteroids have emerged as promising compounds mostly because they have diverse pharmacological activities. Currently, available medications exert numerous systemic toxicities, including hypertension, immune suppression, osteoporosis, and metabolic abnormalities. Thus, further research on phytosteroids to subside these complications is of significant importance. In this study, the information on phytosteroids, their types, and actions against inflammation, and allergic complications was collected by a systematic survey of literature on several scientific search engines. The literature review suggested that phytosteroids exhibit antiinflammatory action via different modes through transrepression or selective COX-2 enzymes. Also, in silico ADMET analysis was carried out on available phytosteroids to uncover their pharmacokinetic properties. Our analysis has shown that eight compounds: withaferin A, stigmasterol, β-sitosterol, guggulsterone, diosgenin, sarsasapogenin, physalin A, and dioscin, -isolated from medicinal plants show similar pharmacokinetic properties as compared to dexamethasone, commercially available glucocorticoid. These phytosteroids could be useful for the treatment of inflammatory diseases, such as rheumatoid arthritis, inflammatory bowel diseases, multiple sclerosis, asthma, and cardiovascular diseases. Thus, systematic research is required to explore potent phytosteroids with lesser side effects, which might substitute the current medications.
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Affiliation(s)
- Rishab Marahatha
- Biological Chemistry Lab, Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal
| | - Kabita Gyawali
- Biological Chemistry Lab, Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal
| | - Kabita Sharma
- Biological Chemistry Lab, Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal
| | - Narayan Gyawali
- Biological Chemistry Lab, Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal
| | - Parbati Tandan
- Biological Chemistry Lab, Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal
| | - Ashma Adhikari
- Biological Chemistry Lab, Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal
| | - Grishma Timilsina
- Biological Chemistry Lab, Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal
| | - Salyan Bhattarai
- Meakins-Christie Laboratories, Department of Medicine, McGill University, Montreal, Canada
| | - Ganesh Lamichhane
- Biological Chemistry Lab, Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal
| | - Ashis Acharya
- Central Department of Geology, Tribhuvan University, Kirtipur, Nepal
| | - Ishwor Pathak
- Department of Chemistry, Amrit Campus, Tribhuvan University, Thamel, Nepal
| | - Hari Prasad Devkota
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Niranjan Parajuli
- Biological Chemistry Lab, Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal
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13
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Nguyen TXT, Dang DL, Ngo VQ, Trinh TC, Trinh QN, Do TD, Thanh TTT. Anti-inflammatory activity of a new compound from Vernonia amygdalina. Nat Prod Res 2020; 35:5160-5165. [PMID: 32633572 DOI: 10.1080/14786419.2020.1788556] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
In this study, a new stigmastane, vernonioside V, was isolated from the ethanol extract of leaves of Vernonia amygdalina along with a known flavonoid, cynaroside, and then anti-inflammatory activity of isolated compounds was investigated. The result showed that vernonioside V at concentration of 30 µg/mL strongly inhibited TNFα, IL-6, and IL-8 inflammatory cytokine production. Furthermore, LPS-induced supreoxide generation in Raw 264.7 were significantly reduced by pre-treatment of vernonioside V (30 µg/mL). These data indicated that vernonioside V had inhibitory activities on pro-inflammatory cytokine in LPS-stimulated Raw 264.7 through reactive oxygen species (ROS).
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Affiliation(s)
- Thi Xuan Thu Nguyen
- Faculty of Chemical Engineering, University of Science and Technology, The University of Danang, Da Nang, Vietnam
| | - Duc Long Dang
- VN-UK Institute for Research and Executive Education, The University of Danang, Da Nang, Vietnam
| | - Van Quang Ngo
- Institute of Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Tat Cuong Trinh
- Key Laboratory for Enzyme and Protein Technology, VNU University of Science, Hanoi, Vietnam
| | - Quang Nam Trinh
- Key Laboratory for Enzyme and Protein Technology, VNU University of Science, Hanoi, Vietnam.,Hanoi- Amsterdam High School for The Gifted, Hanoi, Vietnam
| | | | - Thi Thu Thuy Thanh
- Institute of Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
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