1
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Zou D, Liu L, Liu F, Li D, Hua H. α-Glucosidase Inhibitory Components from Garcinia pedunculata Fruits. Chem Biodivers 2024; 21:e202400409. [PMID: 38459792 DOI: 10.1002/cbdv.202400409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 03/07/2024] [Accepted: 03/08/2024] [Indexed: 03/10/2024]
Abstract
From Garcinia pedunculata Roxb. fruits, two undescribed aromatic compounds including a benzofuran and a depsidone derivative, and a new natural product, together with four known compounds were isolated. Through the analysis of spectroscopic data, high resolution mass spectrum and calculated nuclear magnetic resonance, their structures were determined. The α-glucosidase inhibitory activity of the isolates was evaluated. And compound 3 exhibited a moderate inhibitory effect on α-glucosidase. The molecular docking of compound 3 was performed to elucidate the interaction with α-glucosidase.
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Affiliation(s)
- Deli Zou
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Lei Liu
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Fangshen Liu
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Dahong Li
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Huiming Hua
- Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
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2
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Lu CJ, Liang LF, Zhang GS, Li HY, Fu CQ, Yu Q, Zhou DM, Su ZW, Liu K, Gao CH, Xu XY, Liu YH. Carneusones A-F, Benzophenone Derivatives from Sponge-Derived Fungus Aspergillus carneus GXIMD00543. Mar Drugs 2024; 22:63. [PMID: 38393034 PMCID: PMC10890008 DOI: 10.3390/md22020063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 01/11/2024] [Accepted: 01/23/2024] [Indexed: 02/25/2024] Open
Abstract
Six benzophenone derivatives, carneusones A-F (1-6), along with seven known compounds (7-13) were isolated from a strain of sponge-derived marine fungus Aspergillus carneus GXIMD00543. Their chemical structures were elucidated by detailed spectroscopic data and quantum chemical calculations. Compounds 5, 6, and 8 exhibited moderate anti-inflammatory activity on NO secretion using lipopolysaccharide (LPS)-induced RAW 264.7 cells with EC50 values of 34.6 ± 0.9, 20.2 ± 1.8, and 26.8 ± 1.7 μM, while 11 showed potent effect with an EC50 value of 2.9 ± 0.1 μM.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Xin-Ya Xu
- Guangxi Key Laboratory of Marine Drugs, Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (C.-J.L.); (L.-F.L.); (G.-S.Z.); (H.-Y.L.); (C.-Q.F.); (Q.Y.); (D.-M.Z.); (Z.-W.S.); (K.L.); (C.-H.G.)
| | - Yong-Hong Liu
- Guangxi Key Laboratory of Marine Drugs, Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, China; (C.-J.L.); (L.-F.L.); (G.-S.Z.); (H.-Y.L.); (C.-Q.F.); (Q.Y.); (D.-M.Z.); (Z.-W.S.); (K.L.); (C.-H.G.)
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3
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Casciaro B, Ghirga F, Cappiello F, Vergine V, Loffredo MR, Cammarone S, Puglisi E, Tortora C, Quaglio D, Mori M, Botta B, Mangoni ML. The Triprenylated Anthranoid Ferruginin A, a Promising Scaffold for the Development of Novel Antibiotics against Gram-Positive Bacteria. Antibiotics (Basel) 2022; 11:84. [PMID: 35052961 PMCID: PMC8773144 DOI: 10.3390/antibiotics11010084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 12/30/2021] [Accepted: 01/07/2022] [Indexed: 01/27/2023] Open
Abstract
In today's post-antibiotic era, the search for new antimicrobial compounds is of major importance and nature represents one of the primary sources of bioactive molecules. In this work, through a cheminformatics approach, we clustered an in-house library of natural products and their derivatives based on a combination of fingerprints and substructure search. We identified the prenylated emodine-type anthranoid ferruginin A as a novel antimicrobial compound. We tested its ability to inhibit and kill a panel of Gram-positive and Gram-negative bacteria, and compared its activity with that of two analogues, vismione B and ferruanthrone. Furthermore, the capability of these three anthranoids to disrupt staphylococcal biofilm was investigated, as well as their effect on the viability of human keratinocytes. Ferruginin A showed a potent activity against both the planktonic and biofilm forms of Gram-positive bacteria (i.e., Staphylococcus aureus and S. epidermidis) and had the best therapeutic index compared to vismione B and ferruanthrone. In conclusion, ferruginin A represents a promising scaffold for the further development of valuable antimicrobial agents.
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Affiliation(s)
- Bruno Casciaro
- Department of Biochemical Sciences, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, 00185 Rome, Italy; (B.C.); (F.C.); (M.R.L.); (E.P.)
| | - Francesca Ghirga
- Department of Chemistry and Technology of Drugs, “Department of Excellence 2018–2022”, Sapienza University of Rome, 00185 Rome, Italy; (F.G.); (V.V.); (S.C.); (C.T.); (B.B.)
| | - Floriana Cappiello
- Department of Biochemical Sciences, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, 00185 Rome, Italy; (B.C.); (F.C.); (M.R.L.); (E.P.)
| | - Valeria Vergine
- Department of Chemistry and Technology of Drugs, “Department of Excellence 2018–2022”, Sapienza University of Rome, 00185 Rome, Italy; (F.G.); (V.V.); (S.C.); (C.T.); (B.B.)
| | - Maria Rosa Loffredo
- Department of Biochemical Sciences, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, 00185 Rome, Italy; (B.C.); (F.C.); (M.R.L.); (E.P.)
| | - Silvia Cammarone
- Department of Chemistry and Technology of Drugs, “Department of Excellence 2018–2022”, Sapienza University of Rome, 00185 Rome, Italy; (F.G.); (V.V.); (S.C.); (C.T.); (B.B.)
| | - Elena Puglisi
- Department of Biochemical Sciences, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, 00185 Rome, Italy; (B.C.); (F.C.); (M.R.L.); (E.P.)
| | - Carola Tortora
- Department of Chemistry and Technology of Drugs, “Department of Excellence 2018–2022”, Sapienza University of Rome, 00185 Rome, Italy; (F.G.); (V.V.); (S.C.); (C.T.); (B.B.)
| | - Deborah Quaglio
- Department of Chemistry and Technology of Drugs, “Department of Excellence 2018–2022”, Sapienza University of Rome, 00185 Rome, Italy; (F.G.); (V.V.); (S.C.); (C.T.); (B.B.)
| | - Mattia Mori
- Department of Biotechnology, Chemistry and Pharmacy, “Department of Excellence 2018–2022”, University of Siena, 53100 Siena, Italy;
| | - Bruno Botta
- Department of Chemistry and Technology of Drugs, “Department of Excellence 2018–2022”, Sapienza University of Rome, 00185 Rome, Italy; (F.G.); (V.V.); (S.C.); (C.T.); (B.B.)
| | - Maria Luisa Mangoni
- Department of Biochemical Sciences, Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, 00185 Rome, Italy; (B.C.); (F.C.); (M.R.L.); (E.P.)
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4
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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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5
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Huang YP, Zhao YY, Johnson OO, Zhang J, Zhao M, Che CT, Yin ZQ. Further prenylated anthranoids from Harungana madagascariensis. PHYTOCHEMISTRY 2021; 186:112711. [PMID: 33711738 DOI: 10.1016/j.phytochem.2021.112711] [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: 10/26/2020] [Revised: 02/17/2021] [Accepted: 02/18/2021] [Indexed: 06/12/2023]
Abstract
Ten undescribed anthranoids, including three anthraquinone acetals as racemic mixtures, (±)-kenganthranol G-I, and seven prenylated anthranols, (±)-kenganthranol J-M and harunganol G-I, together with thirteen known compounds, were isolated from the stem bark of Harungana madagascariensis. The structures of (±)-kenganthranol G and (±)-kenganthranol J were confirmed by X-ray crystallography. (±)-Kenganthranol G was separated into (+)-kenganthranol G and (-)-kenganthranol G by chiral HPLC and their absolute configurations were established by electronic circular dichroism. (±)-Kenganthranol L displayed α-glucosidase inhibitory activity with an IC50 of 4.4 μM.
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Affiliation(s)
- Ya-Ping Huang
- Department of TCMs Pharmaceuticals and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Yuan-Yu Zhao
- Department of TCMs Pharmaceuticals and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, People's Republic of China; Laboratory of Translational Medicine, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, People's Republic of China
| | - Oluwatosin O Johnson
- Department of Pharmaceutical Chemistry, University of Lagos, CMUL Campus, Lagos, 100254, Nigeria; Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, Illinois, 60612, United States
| | - Jian Zhang
- Laboratory of Translational Medicine, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, People's Republic of China
| | - Ming Zhao
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, Illinois, 60612, United States; Traditional Chinese Medicine Resources Industrialization Process Collaborative Innovation Center, Nanjing University of Chinese Medicine, Nanjing, 210023, People's Republic of China
| | - Chun-Tao Che
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, Illinois, 60612, United States
| | - Zhi-Qi Yin
- Department of TCMs Pharmaceuticals and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, People's Republic of China.
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6
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Nguyen PTM, Ngo QV, Nguyen MTH, Quach LT, Pyne SG. Hypoglycemic activity of the ethyl acetate extract from Smilax glabra Roxb in mice: Biochemical and histopathological studies. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2021; 23:1558-1564. [PMID: 33489029 PMCID: PMC7811822 DOI: 10.22038/ijbms.2020.46658.10763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Objectives This research was carried out to investigate the hypoglycemic activity of the ethyl acetate (EtOAc) extract from the roots of Smilax glabra Roxb, which strongly exhibit inhibitory activity against α-glucosidase and α-amylase on in vivo type 2 diabetic model. Materials and Methods Column chromatography combined with crystallization was used to isolate the active fraction and compounds. Chemical structures of the compounds were determined based on the analysis of the spectroscopic data and comparison with the literature data. The α-glucosidase inhibitory activity (AGI) and the α-amylase inhibitory activity (AAI) were determined quantitatively spectrophotometrically using p-nitrophenyl α-D-glucopyranoside and soluble starch as substrates, respectively. The hypoglycemic activity was examined by evaluating its effects on glucose and insulin levels, insulin resistance, and histopathology of the pancreatic islets and livers in diabetic induced mice administrated with nicotinamide-streptozotocin. Results The EtOAc extract and the bioactive compounds astilbin and 5-O-caffeoylshikimic acid in the extract were isolated and confirmed in structures, AGI, and AAI. The treatment at the doses of 500 and 1000 µg/kg of body weight reduced blood glucose levels down to the physiological level of the physical controls in the diabetic mice after two weeks (P<0.05). Moreover, the treatment improved insulin sensitivity. Histopathology analysis showed recovering effects in the size of the pancreatic islets and no damaging effects on the liver after treatment compared with the control group. Conclusion Our data suggest that the EtOAc extract possesses hypoglycemic activity and has an antidiabetic potential for therapeutic applications.
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Affiliation(s)
- Phuong Thi Mai Nguyen
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Quang Van Ngo
- Institute of Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Minh Thi Hong Nguyen
- University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Lien Thi Quach
- Institute of Biotechnology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Stephen G Pyne
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, Australia
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7
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Jia C, Xue J, Li X, Li D, Li Z, Hua H. New depsidone and dichromone from the stems of Garcinia paucinervis with antiproliferative activity. J Nat Med 2018; 73:278-282. [PMID: 30182180 DOI: 10.1007/s11418-018-1247-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 08/26/2018] [Indexed: 12/20/2022]
Abstract
A new depsidone, paucinervin Q (1), a new dichromone, paucinervin R (2), and a known compound, paucinervin B (3), were isolated from the stems of Garcinia paucinervis by various chromatographic methods. Their structures were determined by analysis of spectroscopic data. The isolates were evaluated for their antiproliferative activity against three cancer cell lines HL-60, PC-3 and CaCo-2. Compound 1 showed significant inhibitory activities.
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Affiliation(s)
- CuiCui Jia
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning, People's Republic of China
| | - JingJing Xue
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning, People's Republic of China
| | - XinYu Li
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning, People's Republic of China
| | - DaHong Li
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning, People's Republic of China
| | - ZhanLin Li
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China.
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning, People's Republic of China.
| | - HuiMing Hua
- Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China.
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning, People's Republic of China.
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8
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Chen P, Xu R, Wang J, Wu Z, Yan L, Zhao W, Liu Y, Ma W, Shi X, Li H. Starch biotransformation into isomaltooligosaccharides using thermostable alpha-glucosidase from Geobacillus stearothermophilus. PeerJ 2018; 6:e5086. [PMID: 29942709 PMCID: PMC6015754 DOI: 10.7717/peerj.5086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 06/05/2018] [Indexed: 12/28/2022] Open
Abstract
The present study first identified the biotransformation of starch as a novel preparation method was investigated using the alpha-transglucosidase-producing Geobacillus stearothermophilus U2. Subsequently, 5 L- and 20 L-scale fermentations were performed. After isolation and purification, liquid alpha-glucosidase preparations were obtained. Through covalent cross-linking and adsorption cross-linking using chitosan as the carrier and glutaraldehyde as the crosslinking agent, the conditions for immobilization of alpha-glucosidase on chitosan were determined. Moreover, Isomaltooligosaccharides (IMOs) were then prepared using chitosan membrane-immobilized alpha-glucosidase, beta-amylase, pullulanase, fungal alpha-amylase and starch as substrate. The mixed syrup that contained IMOs was evaluated and analyzed by thin-layer chromatography (TLC) and high-performance liquid chromatography (HPLC). In addition, small-scale preparation of IMOs was performed. These results are a strong indication that the alpha-transglucosidase-producing G. stearothermophilus as a potential application technique can be successfully used to prepare industrial IMOs.
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Affiliation(s)
- Peng Chen
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China.,School of Medicine, Yale University, New Haven, CT, United States of America
| | - Ruixiang Xu
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
| | - Jianhui Wang
- School of Medicine, Yale University, New Haven, CT, United States of America
| | - Zhengrong Wu
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
| | - Lei Yan
- College of Life Science and Technology, Heilongjiang August First Land Reclamation University, Heilongjiang, PR China
| | - Wenbin Zhao
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
| | - Yuheng Liu
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
| | - Wantong Ma
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
| | - Xiaofeng Shi
- Gansu Academy of Medical Science, Lanzhou, PR China
| | - Hongyu Li
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, PR China
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9
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Tankeo SB, Damen F, Sandjo LP, Celik I, Tane P, Kuete V. Antibacterial activities of the methanol extracts, fractions and compounds from Harungana madagascariensis Lam. ex Poir. (Hypericaceae). JOURNAL OF ETHNOPHARMACOLOGY 2016; 190:100-105. [PMID: 27267830 DOI: 10.1016/j.jep.2016.06.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 05/23/2016] [Accepted: 06/03/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Harungana madagascariensis Lam. ex Poir. (Hypericaceae) is used in folk medicine to treat a variety of human ailments, mainly antibacterial, antifungal, antiviral and viral infections. In the present study, the methanol extract from the leaves (HML) and bark (HMB) of this plant as well as fractions (HMBa-c), sub-fractions (HMBa1-5) and compounds isolated from HMBa and HMBb namely betulinic acid (1), madagascin (2), ferruginin A (3) and Kaempferol-3-O-β-d-glucopyranoside (4) were tested for their antimicrobial activities against a panel of 28 g-negative bacteria including multidrug resistant (MDR) phenotypes. MATERIALS AND METHODS The broth microdilution method was used to determine the minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of the above samples; column chromatography was used for the fractionation and purification of the bark extract whilst the chemical structures of compounds were determined using spectroscopic techniques. RESULTS Crude extract HMB together with fraction HMBa and sub-fraction HMBa3 were active on the 28 tested bacterial strains. HML as well as fractions HMBb, HMBc and sub-fractions HMBa1, HMBa2, HMBa4 and HMBa5 were selectively active. MIC values below or equal to 1024µg/mL were recorded with these samples on 92.9% (for HML and HMBa 4), 82.1% (for HMBb), 78.6% (for HMBa2), 50.0% (for HMBa5) and 42.9% (for HMBc) tested bacteria. For crude material, the lowest MIC value below 8µg/mL was obtained with HMB against Escherichia coli ATCC10536 and W3110 strains, and with sub-fraction HMBa3 against Klebsiella pneumoniae K2 strains. MIC values below 10µg/mL were recorded with compound 3 against E. coli ATCC10536, Enterobacter aerogenes ATCC13048 and EA294, Pseudomonas aeruginosa PA01, K. pneumoniae K2 and Kp55 and Enterobacter cloacae BM67. CONCLUSIONS Harungana madagascariensis is a potential source of antimicrobial drugs to fight against MDR bacteria. The anthranol 3 is the main antibacterial constituents of the bark of the plant. HMB and compound 3 deserve further investigations to develop natural drug to combat Gram-negative bacteria and otherwise MDR phenotypes.
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Affiliation(s)
- Simplice B Tankeo
- Department of Biochemistry, Faculty of Science, University of Dschang, Cameroon
| | - Francois Damen
- Department of Chemistry, Faculty of Science, University of Dschang, Cameroon
| | - Louis P Sandjo
- Department of Pharmaceutical Sciences, CCS, Universidade Federal de Santa Catarina, Florianópolis 88040-900, Santa Catarina, Brazil
| | - Ilhami Celik
- Department of Chemistry, Faculty of Science, Anadolu University, Eskişehir, Turkey
| | - Pierre Tane
- Department of Chemistry, Faculty of Science, University of Dschang, Cameroon
| | - Victor Kuete
- Department of Biochemistry, Faculty of Science, University of Dschang, Cameroon.
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10
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Kim TH. A novel α-glucosidase inhibitory constituent from Uncaria gambir. J Nat Med 2016; 70:811-5. [PMID: 27262298 DOI: 10.1007/s11418-016-1014-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 05/24/2016] [Indexed: 12/29/2022]
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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