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Kgakatsi NA, Majinda RRT, Masesane IB, Nwamadi MS, Demissie TB, Ombito JO, Gobe I. New isoflavan from Erythrina livingstoniana. Nat Prod Res 2024; 38:493-502. [PMID: 36190792 DOI: 10.1080/14786419.2022.2130300] [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: 06/13/2022] [Accepted: 09/21/2022] [Indexed: 10/10/2022]
Abstract
Chemical investigation of the root wood of Erythrina livingstoniana led to the isolation of one previously undescribed isoflavan (3S,3″R)-7-hydroxy-2'-methoxy-[3″-hydroxy-2″,2″-dimethylpyrano (3',4')] isoflavan 1, together with eleven known compounds 2-12. The structure of compound 1 was elucidated on the basis of extensive spectroscopic and spectrometric analyses (1 D and 2 D-NMR and APCI-HRMS), with absolute configurations established by comparison of experimental and DFT calculated ECD data. The assignment of the absolute configurations of C-3 and C-3″ of compounds 2 and 3, respectively, were reported for the first time. Compounds 1 - 4 were evaluated for their antibacterial activities in vitro against E. coli ATCC 25922 and S. aureus ATCC 25923. Compound 1 exhibited moderate antibacterial activity with MIC value of 0.063 mg/mL against the clinically relevant risk-group 2 (RG-2) bacterium S. aureus.
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Affiliation(s)
- Nayang A Kgakatsi
- Department of Chemistry, University of Botswana, Gaborone, Botswana
- Boitekanelo College, Gaborone, Botswana
| | | | | | | | - Taye B Demissie
- Department of Chemistry, University of Botswana, Gaborone, Botswana
| | - Japheth O Ombito
- Department of Chemistry, University of Botswana, Gaborone, Botswana
| | - Irene Gobe
- Department of Medical Laboratory Science, University of Botswana, Gaborone, Botswana
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Kalita E, Panda M, Rao A, Prajapati VK. Exploring the role of secretory proteins in the human infectious diseases diagnosis and therapeutics. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2023; 133:231-269. [PMID: 36707203 DOI: 10.1016/bs.apcsb.2022.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Secretory proteins are playing important role during the host-pathogen interaction to develop the infection or protection into the cell. Pathogens developing infectious disease to human being are taken up by host macrophages or number of immune cells, play an important role in physiological, developmental and immunological function. At the same time, infectious agents are also secreting various proteins to neutralize the resistance caused by host cells and also helping the pathogens to develop the infection. Secretory proteins (secretome) are only developed at the time of host-pathogen interaction, therefore they become very important to develop the targeted and potential therapeutic strategies. Pathogen specific secretory proteins released during interaction with host cell provide opportunity to develop point of care and rapid diagnostic kits. Proteins secreted by pathogens at the time of interaction with host cell have also been found as immunogenic in nature and numbers of vaccines have been developed to control the spread of human infectious diseases. This chapter highlights the importance of secretory proteins in the development of diagnostic and therapeutic strategies to fight against human infectious diseases.
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Affiliation(s)
- Elora Kalita
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Ajmer, Rajasthan, India
| | - Mamta Panda
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Ajmer, Rajasthan, India
| | - Abhishek Rao
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Ajmer, Rajasthan, India
| | - Vijay Kumar Prajapati
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Ajmer, Rajasthan, India.
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Rahmawati R, Hartati YW, Latip JB, Herlina T. An overview of techniques and strategies for isolation of flavonoids from the genus Erythrina. J Sep Sci 2023:e2200800. [PMID: 36715692 DOI: 10.1002/jssc.202200800] [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: 10/05/2022] [Revised: 01/11/2023] [Accepted: 01/20/2023] [Indexed: 01/31/2023]
Abstract
Plants in the genus Erythrina is a potential source of chemical constituents, one of which is flavonoids, which have diverse bioactivities. To date, literature on the flavonoids from the genus Erythrina has only highlighted the phytochemical aspects, so this review article will discuss isolation techniques and strategies for the first time. More than 420 flavonoids have been reported in the Erythrina genus, which are grouped into 17 categories. These flavonoid compounds were obtained through isolation techniques and strategies using polar, semi-polar, and non-polar solvents. Various chromatographic techniques have been developed to isolate flavonoids using column flash chromatography, quick column chromatography, centrifugally accelerated thin-layer chromatography, radial chromatography, medium-pressure column chromatography, semi-preparative high-performance liquid chromatography, and preparative high-performance liquid chromatography. Chromatographic processes for isolating flavonoids can be optimized using multivariate statistical applications such as response surface methodology with central composite design, Box-Behnken design, Doehlert design, and mixture design.
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Affiliation(s)
- Rahmawati Rahmawati
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Jatinangor, Indonesia.,Central Laboratory of the Directorate of Research and Community Service, Padjadjaran University, Jatinangor, Indonesia
| | - Yeni Wahyuni Hartati
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Jatinangor, Indonesia
| | - Jalifah Binti Latip
- Department of Chemical Sciences, Faculty of Science & Technology, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, Malaysia
| | - Tati Herlina
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Jatinangor, Indonesia
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Lou H, Liu H, Wang H, Zhao Y, Huang L, Fu J, Hao X, Pan W. Diverse flavonoids from the roots of Indigofera stachyodes. Chem Biodivers 2022; 19:e202200676. [PMID: 36069263 DOI: 10.1002/cbdv.202200676] [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: 07/20/2022] [Accepted: 09/06/2022] [Indexed: 11/06/2022]
Abstract
Three new flavonoids , 4'- O - β - D -glucopyranosyl-2 S ,3 R -3,7-dihydroxy-3'-methoxyflavan ( 1 ), (3 R )-7,4'-dihydroxy-5,3'-methoxychalcone ( 2 ), (3 S )-7,2',3'-trihydroxy-6,4'-dimethoxylisoflavan ( 3 ), and one new natural occurring product, (3 S )-6,2',3'-trihydroxy-7,4'-dimethoxylisoflavan ( 4 ), together with eleven known ones ( 5 - 15 ), were isolated from the roots of Indigofera stachyodes . The structures of these compounds were confirmed by UV, IR, MS, and NMR spectroscopic analysis. The absolute configurations of new compounds were elucidated by ECD spectra and chemical method. All the isolated flavonoids were screened for their antioxidant abilities to scavenge DPPH and ABTS + . As results, compounds 2 - 4 , 10 , and 15 exhibited remarkable scavenging activity against both ABTS + and DPPH, with the IC 50 values less than 20 μ M. In addition, compounds 1 , 6 - 9 , and 13 exhibited potential antioxidant scavenging activities, IC 50 values were in the rang of 17.96~85.91 μ M.
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Affiliation(s)
- Huayong Lou
- Guizhou Medical University, State key laboratory of functions and applications of medicinal plants, Baijing road 3491, 550014, Guiyang, CHINA
| | - Hanfei Liu
- Guizhou Medical University, State Key Laboratory of Functions and Applications of Medicinal Plants, Baijin road 3491, Guiyang, CHINA
| | - Huan Wang
- Guizhou Medical University, State Key Laboratory of Functions and Applications of Medicinal Plants, Baijin road 3491, Guiyang, CHINA
| | - Yumin Zhao
- Guizhou University Of Traditional Chinese Medicine, College of pharmacy, Baijin road 3491, Guiyang, CHINA
| | - Lei Huang
- Guizhou Medical University, State Key Laboratory of Functions and Applications of Medicinal Plants, Baijin road 3491, Guiyang, CHINA
| | - Jian Fu
- Guizhou University Of Traditional Chinese Medicine, College of pharmacy, Baijin road 3491, Guiyang, CHINA
| | - Xiaojiang Hao
- Guizhou Medical University, State Key Laboratory of Functions and Applications of Medicinal Plants, Baijin road 3491, Guiyang, CHINA
| | - Weidong Pan
- Guizhou University, School of Pharmaceutical Sciences, 2708 Huaxi avenue, 550025, Guiyang, CHINA
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Recent Updates on Development of Protein-Tyrosine Phosphatase 1B Inhibitors for Treatment of Diabetes, Obesity and Related Disorders. Bioorg Chem 2022; 121:105626. [DOI: 10.1016/j.bioorg.2022.105626] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/19/2021] [Accepted: 01/13/2022] [Indexed: 01/30/2023]
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Obakiro SB, Kiprop A, Kigondu E, K'Owino I, Odero MP, Manyim S, Omara T, Namukobe J, Owor RO, Gavamukulya Y, Bunalema L. Traditional Medicinal Uses, Phytoconstituents, Bioactivities, and Toxicities of Erythrina abyssinica Lam. ex DC. (Fabaceae): A Systematic Review. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2021; 2021:5513484. [PMID: 33763144 PMCID: PMC7952165 DOI: 10.1155/2021/5513484] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/16/2021] [Accepted: 02/22/2021] [Indexed: 12/29/2022]
Abstract
BACKGROUND Many studies have been undertaken on the medicinal values of Erythrina abyssinica Lam. ex DC. (Fabaceae). The details, however, are highly fragmented in different journals, libraries, and other publication media. This study was therefore conducted to provide a comprehensive report on its ethnobotany, ethnomedicinal uses, phytochemicals, and the available pharmacological evidence supporting its efficacy and safety in traditional medicine. METHOD We collected data using a PROSPERO registered systematic review protocol on the ethnobotany, phytochemistry, and ethnopharmacology of Erythrina abyssinica from 132 reports that were retrieved from electronic databases. Documented local names, morphology, growth habit and habitat, ethnomedicinal and nonmedicinal uses, diseases treated, parts used, method of preparation and administration, extraction and chemical identity of isolated compounds, and efficacy and toxicity of extracts and isolated compounds were captured. Numerical data were summarized into means, percentages, and frequencies and presented as graphs and tables. RESULTS Erythrina abyssinica is harvested by traditional herbal medicine practitioners in East, Central, and South African communities to prepare herbal remedies for various human and livestock ailments. These include bacterial and fungal infections, tuberculosis, malaria, HIV/AIDS, diarrhea, cancer, meningitis, inflammatory diseases, urinary tract infections, wounds, diabetes mellitus, and skin and soft tissue injuries. Different extracts and phytochemicals from parts of E. abyssinica have been scientifically proven to possess anti-inflammatory, antibacterial, antioxidant, antiplasmodial, antiproliferative, antifungal, antimycobacterial, antidiarrheal, anti-HIV 1, antidiabetic, and antiobesity activities. This versatile pharmacological activity is due to the abundant flavonoids, alkaloids, and terpenoids present in its different parts. CONCLUSION Erythrina abyssinica is an important ethnomedicinal plant in Africa harboring useful pharmacologically active phytochemicals against various diseases with significant efficacies and minimal toxicity to mammalian cells. Therefore, this plant should be conserved and its potential to provide novel molecules against diseases be explored further. Clinical trials that evaluate the efficacy and safety of extracts and isolated compounds from E. abyssinica are recommended.
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Affiliation(s)
- Samuel Baker Obakiro
- Department of Pharmacology and Therapeutics, Faculty of Health Sciences, Busitema University, P.O. Box 1460, Mbale, Uganda
- Department of Chemistry and Biochemistry, School of Sciences and Aerospace Studies, Moi University, P.O. Box 3900-30100, Eldoret, Kenya
- Africa Centre of Excellence II in Phytochemicals, Textiles and Renewable Energy (ACE II PTRE), Moi University, P.O. Box 3900-30100, Eldoret, Kenya
| | - Ambrose Kiprop
- Department of Chemistry and Biochemistry, School of Sciences and Aerospace Studies, Moi University, P.O. Box 3900-30100, Eldoret, Kenya
- Africa Centre of Excellence II in Phytochemicals, Textiles and Renewable Energy (ACE II PTRE), Moi University, P.O. Box 3900-30100, Eldoret, Kenya
| | - Elizabeth Kigondu
- Centre of Traditional Medicine and Drug Research, Kenya Medical Research Institute, P.O. Box 54840-00200, Nairobi, Kenya
| | - Isaac K'Owino
- Department of Pure and Applied Chemistry, Faculty of Science, Masinde-Muliro University, P.O. Box 190-50100, Kakamega, Kenya
- Africa Centre of Excellence II in Phytochemicals, Textiles and Renewable Energy (ACE II PTRE), Moi University, P.O. Box 3900-30100, Eldoret, Kenya
| | - Mark Peter Odero
- Department of Chemistry and Biochemistry, School of Sciences and Aerospace Studies, Moi University, P.O. Box 3900-30100, Eldoret, Kenya
- Africa Centre of Excellence II in Phytochemicals, Textiles and Renewable Energy (ACE II PTRE), Moi University, P.O. Box 3900-30100, Eldoret, Kenya
| | - Scolastica Manyim
- Department of Chemistry and Biochemistry, School of Sciences and Aerospace Studies, Moi University, P.O. Box 3900-30100, Eldoret, Kenya
- Africa Centre of Excellence II in Phytochemicals, Textiles and Renewable Energy (ACE II PTRE), Moi University, P.O. Box 3900-30100, Eldoret, Kenya
| | - Timothy Omara
- Department of Chemistry and Biochemistry, School of Sciences and Aerospace Studies, Moi University, P.O. Box 3900-30100, Eldoret, Kenya
- Africa Centre of Excellence II in Phytochemicals, Textiles and Renewable Energy (ACE II PTRE), Moi University, P.O. Box 3900-30100, Eldoret, Kenya
- Department of Quality Control and Quality Assurance, Product Development Directory, AgroWays Uganda Limited, Plot 34-60, Kyabazinga Way, P.O. Box 1924, Jinja, Uganda
| | - Jane Namukobe
- Department of Chemistry, School of Physical Sciences, College of Natural Sciences, Makerere University, P.O. Box 7062, Kampala, Uganda
| | - Richard Oriko Owor
- Department of Chemistry, Faculty of Science Education, Busitema University, P.O. Box 236, Tororo, Uganda
| | - Yahaya Gavamukulya
- Department of Biochemistry and Molecular Biology, Faculty of Health Sciences, Busitema University, P.O. Box 1460, Mbale, Uganda
| | - Lydia Bunalema
- Department of Pharmacology and Therapeutics, School of Biomedical Sciences, Makerere University College of Health Sciences, P.O. Box 7062, Kampala, Uganda
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Proença C, Ribeiro D, Freitas M, Carvalho F, Fernandes E. A comprehensive review on the antidiabetic activity of flavonoids targeting PTP1B and DPP-4: a structure-activity relationship analysis. Crit Rev Food Sci Nutr 2021; 62:4095-4151. [PMID: 33554619 DOI: 10.1080/10408398.2021.1872483] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Type 2 diabetes (T2D) is an expanding global health problem, resulting from defects in insulin secretion and/or insulin resistance. In the past few years, both protein tyrosine phosphatase 1B (PTP1B) and dipeptidyl peptidase-4 (DPP-4), as well as their role in T2D, have attracted the attention of the scientific community. PTP1B plays an important role in insulin resistance and is currently one of the most promising targets for the treatment of T2D, since no available PTP1B inhibitors were still approved. DPP-4 inhibitors are among the most recent agents used in the treatment of T2D (although its use has been associated with possible cardiovascular adverse events). The antidiabetic properties of flavonoids are well-recognized, and include inhibitory effects on the above enzymes, although hitherto not therapeutically explored. In the present study, a comprehensive review of the literature of both synthetic and natural isolated flavonoids as inhibitors of PTP1B and DPP-4 activities is made, including their type of inhibition and experimental conditions, and structure-activity relationship, covering a total of 351 compounds. We intend to provide the most favorable chemical features of flavonoids for the inhibition of PTP1B and DPP-4, gathering information for the future development of compounds with improved potential as T2D therapeutic agents.
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Affiliation(s)
- Carina Proença
- LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Daniela Ribeiro
- LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Marisa Freitas
- LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Félix Carvalho
- UCIBIO, REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Eduarda Fernandes
- LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
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Recent advance on PTP1B inhibitors and their biomedical applications. Eur J Med Chem 2020; 199:112376. [DOI: 10.1016/j.ejmech.2020.112376] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 04/22/2020] [Accepted: 04/22/2020] [Indexed: 12/17/2022]
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Son NT, Elshamy AI. Flavonoids and other Non-alkaloidal Constituents of Genus Erythrina: Phytochemical Review. Comb Chem High Throughput Screen 2020; 24:20-58. [PMID: 32516097 DOI: 10.2174/1386207323666200609141517] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 03/19/2020] [Accepted: 04/07/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Genus Erythrina belongs to family Fabaceae, which is widely distributed in tropical and subtropical areas. It has been used in both traditional herbal medicines and pharmacological applications. Original research articles and publications on the overview of alkaloids related to this genus are available, but a supportive systematic review account which highlighted phytochemical aspects of other types of secondary metabolites is currently insufficient. OBJECTIVE With the utilization of data and information from SCI-Finder, Google Scholar, the Web of Science, Scopus, Science Direct, PubMed, Chemical Abstracts, ACS journals, Springer, Taylor Francis, Bentham Science and IOP Science, the reliable material sources of this systematic review paper were obtained from the literature published from the 1980s to now. CONCLUSION A vast amount of data showed that the non-alkaloidal secondary metabolites were obtained from genus Erythrina with various classes of chemical structures. Herein, approximately five hundred constituents were isolated, comprising flavonoids, terpenoids, saponins, phytosterols, phenols, arylbenzofurans, coumarins, alcohols, ceramides, mono-sugars and fatty acid derivatives. In agreement with the previous phytochemical reports on the plants of the family Fabaceae, flavonoids reached a high amount in the plants of genus Erythrina. Numerous biological activity investigations such as anti-bacteria, anti-cancer, anti-virus using isolated compounds from Erythrina species suggested that secondary metabolites of Erythrina plants are now becoming the promising agents for drug developments.
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Affiliation(s)
- Ninh T Son
- Department of Bioactive Products, Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau giay, Hanoi, Vietnam
| | - Abdelsamed I Elshamy
- Department of Natural Compounds Chemistry, National Research Centre, 33 El-Bohouth St., Dokki, Giza, 12622, Egypt
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Iwai K, Ono M, Nanjo Y, Ema T. Minimization of Amounts of Catalyst and Solvent in NHC-Catalyzed Benzoin Reactions of Solid Aldehydes: Mechanistic Consideration of Solid-to-Solid Conversion and Total Synthesis of Isodarparvinol B. ACS OMEGA 2020; 5:10207-10216. [PMID: 32391509 PMCID: PMC7203951 DOI: 10.1021/acsomega.0c01141] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 04/08/2020] [Indexed: 05/03/2023]
Abstract
Attempts were made to minimize the amounts of catalyst and solvent in the NHC-catalyzed benzoin reactions of solid aldehydes. In some case, solid-to-solid conversions proceeded in the solvent-free NHC-catalyzed benzoin reactions. Even if a mixture of the substrate, N-heterocyclic carbene (NHC) precursor, and inorganic base was initially a powdery solid, the reaction did proceed at reaction temperature lower than the melting points of each compound. The solid mixture partially melted or became a slurry or suspension in the meantime. We call this solid/liquid mixture a semisolid state. The reaction giving an optically active product was faster than that giving a racemic mixture of the same product. Melting-point depression was observed for a series of mixtures of the substrate and product in different substrate/product ratios. Solvent-free solid-to-solid conversions were accelerated by the formation of a semisolid state resulting from the melting-point depression of the solid substrate accompanied by the product formation. In the case of solid substrates with high melting points, melting-point depression was useless, and the addition of a small amount of solvent was needed. The first total synthesis of isodarparvinol B was achieved via the NHC-catalyzed intramolecular benzoin reaction using a small amount of solvent as an additive.
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Fan JR, Kuang Y, Dong ZY, Yi Y, Zhou YX, Li B, Qiao X, Ye M. Prenylated Phenolic Compounds from the Aerial Parts of Glycyrrhiza uralensis as PTP1B and α-Glucosidase Inhibitors. JOURNAL OF NATURAL PRODUCTS 2020; 83:814-824. [PMID: 32196343 DOI: 10.1021/acs.jnatprod.9b00262] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Glycyrrhiza uralensis (liquorice) is a well-known medicinal plant. Its roots and rhizomes are used as the popular Chinese herbal medicine Gan-Cao. An ethanol extract of the aerial parts of G. uralensis showed antidiabetic effects on db/db mice. It decreased the blood glucose level by 30.3% and increased the serum insulin level by 41.8% compared to the control group. Eighty-six phenolic compounds (1-86) were obtained from the aerial parts, including the new prenylated isoflavanones (1-5), isoflavans (6-9), and a 2-phenylbenzofuran (10). The structures were identified by NMR and HRESIMS data analyses, and the absolute configurations were established by comparing the calculated and experimental ECD spectroscopic data. Compounds 2, 6, and 10 inhibited PTP1B with IC50 values of 5.9, 6.7, and 5.3 μM, respectively. Compound 2 and the known compounds glycycoumarin (76) and glyurallin A (79) inhibited α-glucosidase with IC50 values of 20.1, 0.1, and 0.3 μM, respectively. Compound 4 at 10 μM increased the glucose uptake rate to 95% in an insulin resistance HepG2 cell model (p < 0.01).
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Affiliation(s)
- Jing-Ran Fan
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, People's Republic of China
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Yi Kuang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Ze-Yuan Dong
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Yang Yi
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Yan-Xia Zhou
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Bin Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Xue Qiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Min Ye
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, People's Republic of China
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Abdel-Rahman RF, Ezzat SM, Ogaly HA, Abd-Elsalam RM, Hessin AF, Fekry MI, Mansour DF, Mohamed SO. Ficus deltoidea extract down-regulates protein tyrosine phosphatase 1B expression in a rat model of type 2 diabetes mellitus: a new insight into its antidiabetic mechanism. J Nutr Sci 2020; 9:e2. [PMID: 32042410 PMCID: PMC6984126 DOI: 10.1017/jns.2019.40] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 11/29/2019] [Accepted: 12/03/2019] [Indexed: 12/14/2022] Open
Abstract
Ficus deltoidea var. deltoidea Jack (FD) is a well-known plant used in Malay folklore medicine to lower blood glucose in diabetic patients. For further research of the antihyperglycemic mechanisms, the protein tyrosine phosphatase 1B (PTP1B)-inhibitory effect of FD was analysed both in vitro and in vivo. To optimise a method for FD extraction, water, 50, 70, 80, 90 and 95 % ethanol extracts were prepared and determined for their total phenolic and triterpene contents, and PTP1B-inhibition capacity. Among the tested extracts, 70 % ethanol FD extract showed a significant PTP1B inhibition (92·0 % inhibition at 200 µg/ml) and high phenolic and triterpene contents. A bioassay-guided fractionation of the 70 % ethanol extract led to the isolation of a new triterpene (3β,11β-dihydroxyolean-12-en-23-oic acid; F3) along with six known compounds. In vivo, 4 weeks' administration of 70 % ethanol FD extract (125, 250 and 500 mg/kg/d) to streptozotocin-nicotinamide-induced type 2 diabetic rats reversed the abnormal changes of blood glucose, insulin, total Hb, GLUT2, lipid profile, and oxidative stress in liver and pancreas. Moreover, FD reduced the mRNA expression of the key gluconeogenic enzymes (phosphoenolpyruvate carboxykinase and glucose 6-phosphatase) and restored insulin receptor and GLUT2 encoding gene (Slc2a2) expression. In addition, FD significantly down-regulated the hepatic PTP1B gene expression. These results revealed that FD could potentially improve insulin sensitivity, suppress hepatic glucose output and enhance glucose uptake in type 2 diabetes mellitus through down-regulation of PTP1B. Together, our findings give scientific evidence for the traditional use of FD as an antidiabetic agent.
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Key Words
- CAT, catalase
- Dihydroxyolean-12-en-23-oic acid
- FBG, fasting blood glucose
- FD, Ficus deltoidea var. deltoidea Jack
- Ficus deltoidea
- G6Pase, glucose 6-phosphatase
- GPx, glutathione peroxidase
- GSH, reduced glutathione
- Glucose 6-phosphatase
- Glucose transporter-2
- MDA, malondialdehyde
- MET, metformin
- NA, nicotinamide
- PEPCK, phosphoenolpyruvate carboxykinase
- PTP, protein tyrosine phosphatase
- Phosphoenolpyruvate carboxykinase
- Protein tyrosine phosphatase 1B
- SOD, superoxide dismutase
- STZ, streptozotocin
- Slc2a2, GLUT2 gene
- T2DM, type 2 diabetes mellitus
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Affiliation(s)
| | - Shahira M. Ezzat
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr El-Einy Street, Cairo11562, Egypt
- Pharmacognosy Department, Faculty of Pharmacy, October University for Modern Sciences and Arts, 6th October Campus, 12566, Egypt
| | - Hanan A. Ogaly
- Chemistry Department, College of Science, King Khalid University, Abha, Saudi Arabia
- Biochemistry Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Reham M. Abd-Elsalam
- Pathology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Alyaa F. Hessin
- Pharmacology Department, National Research Centre, Giza, Egypt
- Microbiology and Immunology Department, College of Medicine, University of Illinois, Chicago, IL, USA
| | - Mostafa I. Fekry
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr El-Einy Street, Cairo11562, Egypt
| | - Dina F. Mansour
- Pharmacology Department, National Research Centre, Giza, Egypt
| | - Shanaz O. Mohamed
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Pulau Pinang, Malaysia
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13
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Eleftheriou P, Therianou E, Lazari D, Dirnali S, Micha A. Docking Assisted Prediction and Biological Evaluation of Sideritis L. Components with PTP1b Inhibitory Action and Probable Anti-Diabetic Properties. Curr Top Med Chem 2019; 19:383-392. [DOI: 10.2174/1568026619666190219104430] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 02/09/2019] [Accepted: 02/11/2019] [Indexed: 12/13/2022]
Abstract
Background:
The main characteristic of Diabetes type II is the impaired activation of intracellular
mechanisms triggered by the action of insulin. PTP1b is a Protein Tyrosine Phosphatase that
dephosphorylates insulin receptor causing its desensitization. Since inhibition of PTP1b may prolong
insulin receptor activity, PTP1b has become a drug target for the treatment of Diabetes II. Although a
number of inhibitors have been synthesized during the last decades, the research still continues for the
development of more effective and selective compounds. Moreover, several constituents of plants and
edible algae with PTP1b inhibitory action have been found, adding this extra activity at the pallet of
properties of the specific natural products.
Objective:
Sideritis L. (Lamiaceae) is a herbal plant growing around the Mediterranean sea which is included
in the Mediterranean diet for centuries. The present study is the continuation of a previous work
where the antioxidant and anti-inflammatory activities of the components of Sideritis L. were evaluated
and aimed to investigate the potential of some sideritis’s components to act as PTP1b inhibitors, thus
exhibiting the beneficial effect in the treatment of diabetes II.
Methods:
Docking analysis was done to predict PTP1b inhibitory action. Human recombinant PTP1b
enzyme was used for the evaluation of the PTP1b inhibitory action, while inhibition of the human LAR
and human T-cell PTP was tested for the estimation of the selectivity of the compounds.
Conclusion:
Docking analysis effectively predicted inhibition and mode of inhibitory action. According
to the experimental results, four of the components exhibited PTP1b inhibitory action. The most active
ones were acetoside, which acted as a competitive inhibitor, with an IC50 of 4 µM and lavandufolioside,
which acted as an uncompetitive inhibitor, with an IC50 of 9.3 µM. All four compounds exhibited increased
selectivity against PTP1b.
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Affiliation(s)
- Phaedra Eleftheriou
- Department of Medical Laboratory Studies, School of Health and Medical Care, Alexander Technological Educational Institute of Thessaloniki, ATEITH Campus, Sindos, 57400, Thessaloniki, Greece
| | - Ekaterini Therianou
- Department of Medical Laboratory Studies, School of Health and Medical Care, Alexander Technological Educational Institute of Thessaloniki, ATEITH Campus, Sindos, 57400, Thessaloniki, Greece
| | - Diamanto Lazari
- Laboratory of Pharmacognosy, Division of Pharmacognosy-Pharmacology, School of Pharmacy, Faculty of Health Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Stavroula Dirnali
- Department of Medical Laboratory Studies, School of Health and Medical Care, Alexander Technological Educational Institute of Thessaloniki, ATEITH Campus, Sindos, 57400, Thessaloniki, Greece
| | - Anna Micha
- Department of Medical Laboratory Studies, School of Health and Medical Care, Alexander Technological Educational Institute of Thessaloniki, ATEITH Campus, Sindos, 57400, Thessaloniki, Greece
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Identification of novel imidazole flavonoids as potent and selective inhibitors of protein tyrosine phosphatase. Bioorg Chem 2019; 88:102900. [PMID: 30991192 DOI: 10.1016/j.bioorg.2019.03.074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 03/18/2019] [Accepted: 03/30/2019] [Indexed: 01/12/2023]
Abstract
A series of imidazole flavonoids as new type of protein tyrosine phosphatase inhibitors were synthesized and characterized. Most of them gave potent protein phosphatase 1B (PTP1B) inhibitory activities. Especially, compound 11a could effectively inhibit PTP1B with an IC50 value of 0.63 μM accompanied with high selectivity ratio (9.5-fold) over T-cell protein tyrosine phosphatase (TCPTP). This compound is cell permeable with relatively low cytotoxicity. The high binding affinity and selectivity was disclosed by molecular modeling and dynamics studies. The structural features essential for activity were confirmed by quantum chemical studies.
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15
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Zhang L, Ge Y, Song HM, Wang QM, Zhou CH. Design, synthesis of novel azolyl flavonoids and their protein tyrosine Phosphatase-1B inhibitory activities. Bioorg Chem 2018; 80:195-203. [DOI: 10.1016/j.bioorg.2018.06.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 05/30/2018] [Accepted: 06/03/2018] [Indexed: 12/15/2022]
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16
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Protein tyrosine phosphatase 1B inhibitors from natural sources. Arch Pharm Res 2017; 41:130-161. [PMID: 29214599 DOI: 10.1007/s12272-017-0997-8] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 11/26/2017] [Indexed: 01/25/2023]
Abstract
Since PTP1B enzyme was discovered in 1988, it has captured the research community's attention. This landmark discovery has stimulated numerous research studies on a variety of human diseases, including cancer, inflammation, and diabetes. Tremendous progress has been made in finding PTP1B inhibitors and exploring PTP1B regulatory mechanisms. This review investigates for the natural PTP1B inhibitors, and focuses on the common characteristics of the discovered structures and structure-activity relationships. To facilitate understanding, all the natural compounds are here divided into five different classes (fatty acids, phenolics, terpenoids, steroids, and alkaloids), according to their skeletons. These PTP1B inhibitors of scaffold structures could serve as a theoretical basis for new concept drug discovery and design.
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17
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Proença C, Freitas M, Ribeiro D, Sousa JLC, Carvalho F, Silva AMS, Fernandes PA, Fernandes E. Inhibition of protein tyrosine phosphatase 1B by flavonoids: A structure - activity relationship study. Food Chem Toxicol 2017; 111:474-481. [PMID: 29175190 DOI: 10.1016/j.fct.2017.11.039] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 11/05/2017] [Accepted: 11/19/2017] [Indexed: 12/23/2022]
Abstract
The classical non-transmembrane protein tyrosine phosphatase 1B (PTP1B) has emerged as a key negative regulator of insulin signaling pathways that leads to insulin resistance, turning this enzyme a promising therapeutic target in the management of type 2 diabetes mellitus (T2DM). In the present work, the in vitro inhibitory activity of a panel of structurally related flavonoids, for recombinant human PTP1B was studied and the type of inhibition of the most active compounds further evaluated. The majority of the studied flavonoids was tested in this work for the first time, including flavonoid C13, which was the most potent inhibitor. It was observed that the ability to inhibit PTP1B depends on the nature, position and number of substituents in the flavonoid structure, as the presence of both 7- and 8-OBn groups in the A ring, together with the presence of both 3' and 4'-OMe groups in the B ring and the 3-OH group in the C ring; these substituents increase the flavonoids' ability to inhibit PTP1B. In conclusion, some of the tested flavonoids seem to be promising PTP1B inhibitors and potential effective agents in the management of T2DM, by increasing insulin sensitivity.
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Affiliation(s)
- Carina Proença
- UCIBIO, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Marisa Freitas
- UCIBIO, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Daniela Ribeiro
- UCIBIO, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Joana L C Sousa
- Department of Chemistry & QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Félix Carvalho
- UCIBIO, REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal.
| | - Artur M S Silva
- Department of Chemistry & QOPNA, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Pedro A Fernandes
- UCIBIO, REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - Eduarda Fernandes
- UCIBIO, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal.
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18
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Li K, Ji S, Song W, Kuang Y, Lin Y, Tang S, Cui Z, Qiao X, Yu S, Ye M. Glycybridins A-K, Bioactive Phenolic Compounds from Glycyrrhiza glabra. JOURNAL OF NATURAL PRODUCTS 2017; 80:334-346. [PMID: 28140583 DOI: 10.1021/acs.jnatprod.6b00783] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In an attempt to discover bioactive agents from the herbal medicine Glycyrrhiza glabra (widely known as licorice), 11 new phenolic compounds, glycybridins A-K (1-11), along with 47 known phenolics (12-58) were isolated. Their structures were elucidated on the basis of extensive NMR and MS analyses as well as experimental and computed ECD data. According to the clinical therapeutic effects of licorice, enzyme or cell-based bioactivity screenings of 1-58 were conducted. A number of compounds significantly activate Nrf2, inhibit tyrosinase or PTP1B, inhibit LPS-induced NO production and NF-κB transcription, and inhibit the proliferation of human cancer cells (HepG2, SW480, A549, MCF7). Glycybridin D (4) showed moderate cytotoxic activities against the four cancer cell lines, with IC50 values ranging from 4.6 to 6.6 μM. Further studies indicated that 4 (10 mg/kg, ip) decreased tumor mass by 39.7% on an A549 human lung carcinoma xenograft mice model, but showed little toxicity.
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Affiliation(s)
- Kai Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Shuai Ji
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Wei Song
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Yi Kuang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Yan Lin
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Shunan Tang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Zexu Cui
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Xue Qiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Siwang Yu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Beijing 100191, People's Republic of China
| | - Min Ye
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , 38 Xueyuan Road, Beijing 100191, People's Republic of China
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19
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Jeong SY, Nguyen PH, Zhao BT, Ali MY, Choi JS, Min BS, Woo MH. Chemical Constituents of Euonymus alatus (Thunb.) Sieb. and Their PTP1B and α-Glucosidase Inhibitory Activities. Phytother Res 2015; 29:1540-8. [PMID: 26172104 DOI: 10.1002/ptr.5411] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 06/13/2015] [Indexed: 11/10/2022]
Abstract
Phytochemical study on the corks of Euonymus alatus resulted in the isolation of a novel 3-hydroxycoumarinflavanol (23), along with ten triterpenoids (1-10), ten phenolic derivatives (11-20), and two flavonoid glycosides (21 and 22). Their structures were determined by extensive 1D and 2D-nuclear magnetic resonance spectroscopic and mass spectrometry data analysis. Furthermore, their inhibitory effects against the protein tyrosine phosphatases 1B (PTP1B) and α-glucosidase enzyme activity were evaluated. Compounds 6, 7, 9, 15, 19, and 23 were non-competitive inhibitors, exhibiting most potency with IC50 values ranging from 5.6 ± 0.9 to 18.4 ± 0.3 µm, against PTP1B. Compound 3 (competitive), compounds 5 and 15 (mixed-competitive) displayed potent inhibition with IC50 values of 15.1 ± 0.7, 23.6 ± 0.6 and 14.8 ± 0.9 µm, respectively. Moreover, compounds 15, 20, and 23 exhibited potent inhibition on α-glucosidase with IC50 values of 10.5 ± 0.8, 9.5 ± 0.6, and 9.1 ± 0.5 µm, respectively. Thus, these active ingredients may have value as new lead compounds for the development of new antidiabetic agents.
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Affiliation(s)
- Su-Yang Jeong
- College of Pharmacy, Catholic University of Daegu, Gyeongsan, 712-702, Korea
| | - Phi-Hung Nguyen
- College of Pharmacy, Catholic University of Daegu, Gyeongsan, 712-702, Korea
| | - Bing-Tian Zhao
- College of Pharmacy, Catholic University of Daegu, Gyeongsan, 712-702, Korea
| | - Md Yousof Ali
- Department of Food Science & Nutrition, Pukyong National University, Busan, 608-737, Korea
| | - Jae-Sue Choi
- Department of Food Science & Nutrition, Pukyong National University, Busan, 608-737, Korea
| | - Byung-Sun Min
- College of Pharmacy, Catholic University of Daegu, Gyeongsan, 712-702, Korea
| | - Mi-Hee Woo
- College of Pharmacy, Catholic University of Daegu, Gyeongsan, 712-702, Korea
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20
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Nguyen PH, Ji DJ, Han YR, Choi JS, Rhyu DY, Min BS, Woo MH. Selaginellin and biflavonoids as protein tyrosine phosphatase 1B inhibitors from Selaginella tamariscina and their glucose uptake stimulatory effects. Bioorg Med Chem 2015; 23:3730-7. [DOI: 10.1016/j.bmc.2015.04.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/30/2015] [Accepted: 04/02/2015] [Indexed: 01/29/2023]
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21
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Na B, Nguyen PH, Zhao BT, Vo QH, Min BS, Woo MH. Protein tyrosine phosphatase 1B (PTP1B) inhibitory activity and glucosidase inhibitory activity of compounds isolated from Agrimonia pilosa. PHARMACEUTICAL BIOLOGY 2015; 54:474-480. [PMID: 26084800 DOI: 10.3109/13880209.2015.1048372] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
CONTEXT Despite phytochemical studies of Agrimonia pilosa Ledeb. (Rosaceae), the antidiabetic effects of this plant are unknown. OBJECTIVE This study characterizes the isolated compounds from the aerial parts of A. pilosa and evaluates their PTP1B and α-glucosidase inhibitory properties. MATERIALS AND METHODS Ethanol extract of A. pilosa was found to inhibit 64% PTP1B activity at 30 μg/mL. The ethanol extract was partitioned with methylene chloride, ethyl acetate, n-butanol, and water fractions. Among these, the ethyl acetate fraction displayed the most potent PTP1B activity. The ethyl acetate extract was separated by chromatographic methods to obtain flavonoids and triterpenoids (1-11); which were evaluated for their inhibitory effects on PTP1B activity with p-nitrophenyl phosphate (p-NPP) as a substrate, and also α-glucosidase enzyme. RESULTS Compounds 1-11 were identified as apigenin-7-O-β-d-glucuronide-6″-methyl ester, triliroside, quercetin-7-O-β-d-glycoside, quercetin-3-O-β-d-glycoside, kaempferol, kaempferol-3-O-α-l-rhamnoside, β-sitosterol, ursolic acid, tormentic acid, methyl 2-hydroxyl tricosanoate, and palmitic acid. Compounds 8, 9, and 11 displayed inhibitory effects on PTP1B activity with IC50 values of 3.47 ± 0.02, 0.50 ± 0.06, and 0.10 ± 0.03 μM, respectively. Compounds 3, 4, 6, and 9 exhibited inhibition of the α-glucosidase activity with IC50 values of 11.2 ± 0.2, 29.6 ± 0.9, 28.5 ± 0.1, and 23.8 ± 0.4 μM, respectively. DISCUSSION AND CONCLUSION As major ingredients of A. pilosa, compounds 1, 6, 8, and 9 showed the greatest inhibitory potency on PTP1B activity. Compounds 3, 6, 8, and 9 also showed potent inhibitory effects on α-glucosidase enzyme. This result suggested the potential of these compounds for developing antidiabetic agents.
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Affiliation(s)
- Braham Na
- a College of Pharmacy, Drug Research and Development Center, Catholic University of Daegu , Gyeongsan , Republic of Korea
| | - Phi-Hung Nguyen
- a College of Pharmacy, Drug Research and Development Center, Catholic University of Daegu , Gyeongsan , Republic of Korea
| | - Bing-Tian Zhao
- a College of Pharmacy, Drug Research and Development Center, Catholic University of Daegu , Gyeongsan , Republic of Korea
| | - Quoc-Hung Vo
- a College of Pharmacy, Drug Research and Development Center, Catholic University of Daegu , Gyeongsan , Republic of Korea
| | - Byung Sun Min
- a College of Pharmacy, Drug Research and Development Center, Catholic University of Daegu , Gyeongsan , Republic of Korea
| | - Mi Hee Woo
- a College of Pharmacy, Drug Research and Development Center, Catholic University of Daegu , Gyeongsan , Republic of Korea
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22
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Liu M, Wang L, Sun X, Zhao X. Investigating the impact of Asp181 point mutations on interactions between PTP1B and phosphotyrosine substrate. Sci Rep 2014; 4:5095. [PMID: 24865376 PMCID: PMC4035576 DOI: 10.1038/srep05095] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 05/07/2014] [Indexed: 01/27/2023] Open
Abstract
Protein tyrosine phosphatase 1B (PTP1B) is a key negative regulator of insulin and leptin signaling, which suggests that it is an attractive therapeutic target in type II diabetes and obesity. The aim of this research is to explore residues which interact with phosphotyrosine substrate can be affected by D181 point mutations and lead to increased substrate binding. To achieve this goal, molecular dynamics simulations were performed on wild type (WT) and two mutated PTP1B/substrate complexes. The cross-correlation and principal component analyses show that point mutations can affect the motions of some residues in the active site of PTP1B. Moreover, the hydrogen bond and energy decomposition analyses indicate that apart from residue 181, point mutations have influence on the interactions of substrate with several residues in the active site of PTP1B.
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Affiliation(s)
- Mengyuan Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Lushan Wang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China
| | - Xun Sun
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Xian Zhao
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
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23
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Synthesis and cytotoxicity of chalcones and 5-deoxyflavonoids. ScientificWorldJournal 2013; 2013:649485. [PMID: 23844408 PMCID: PMC3690745 DOI: 10.1155/2013/649485] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 05/19/2013] [Indexed: 11/17/2022] Open
Abstract
Chalcones 1~8 and 5-deoxyflavonoids 9~22 were synthesized in good yields by aldol condensation, Algar-Flynn-Oyamada reaction, glycosidation, and deacetylation reaction, respectively, starting from 2-acetyl phenols substituted by methoxy or methoxymethoxy group and appropriately benzaldehydes substituted by methoxy, methoxymethoxy group, or chlorine. Among them, 13 and 17~22 are new compounds. The cytotoxicity bioassays of these chalcones and 5-deoxyflavonoids were screened using the sulforhodamine B (SRB) protein staining method, and the results showed that compounds 2, 4, 5, 6, 10, 15, and 19 exhibited moderate cytotoxicity against the cancer cell line of MDA-MB-231, U251, BGC-823, and B16 in comparison with control drugs (HCPT, Vincristine, and Taxol).
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24
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Shi D, Guo S, Jiang B, Guo C, Wang T, Zhang L, Li J. HPN, a synthetic analogue of bromophenol from red alga Rhodomela confervoides: synthesis and anti-diabetic effects in C57BL/KsJ-db/db mice. Mar Drugs 2013; 11:350-62. [PMID: 23364683 PMCID: PMC3640384 DOI: 10.3390/md11020350] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 01/16/2013] [Accepted: 01/21/2013] [Indexed: 01/12/2023] Open
Abstract
3,4-dibromo-5-(2-bromo-3,4-dihydroxy-6-(isopropoxymethyl)benzyl)benzene-1,2-diol (HPN) is a synthetic analogue of 3,4-dibromo-5-(2-bromo-3,4-dihydroxy-6-(ethoxymethyl)benzyl)benzene-1,2-diol (BPN), which is isolated from marine red alga Rhodomela confervoides with potent protein tyrosine phosphatase 1B (PTP1B) inhibition (IC50 = 0.84 μmol/L). The in vitro assay showed that HPN exhibited enhanced inhibitory activity against PTP1B with IC50 0.63 μmol/L and high selectivity against other PTPs (T cell protein tyrosine phosphatase (TCPTP), leucocyte antigen-related tyrosine phosphatase (LAR), Src homology 2-containing protein tyrosine phosphatase-1 (SHP-1) and SHP-2). The results of antihyperglycemic activity using db/db mouse model demonstrated that HPN significantly decreased plasma glucose (P < 0.01) after eight weeks treatment period. HPN lowered serum triglycerides and total cholesterol concentration in a dose-dependent manner. Besides, both of the high and medium dose groups of HPN remarkably decreased HbA1c levels (P < 0.05). HPN in the high dose group markedly lowered the insulin level compared to the model group (P < 0.05), whereas the effects were less potent than the positive drug rosiglitazone. Western blotting results showed that HPN decreased PTP1B levels in pancreatic tissue. Last but not least, the results of an intraperitoneal glucose tolerance test in Sprague–Dawley rats indicate that HPN have a similar antihyperglycemic activity as rosiglitazone. HPN therefore have potential for development as treatments for Type 2 diabetes.
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Affiliation(s)
- Dayong Shi
- Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; E-Mails: (S.G.); (B.J.); (C.G.)
- Nantong Branch, Institute of Oceanology, Chinese Academy of Sciences, Nantong 226006, China
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-0532-8289-8719; Fax: +86-0532-8289-8641
| | - Shuju Guo
- Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; E-Mails: (S.G.); (B.J.); (C.G.)
- Nantong Branch, Institute of Oceanology, Chinese Academy of Sciences, Nantong 226006, China
| | - Bo Jiang
- Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; E-Mails: (S.G.); (B.J.); (C.G.)
- Nantong Branch, Institute of Oceanology, Chinese Academy of Sciences, Nantong 226006, China
| | - Chao Guo
- Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; E-Mails: (S.G.); (B.J.); (C.G.)
- Nantong Branch, Institute of Oceanology, Chinese Academy of Sciences, Nantong 226006, China
| | - Tao Wang
- Jiangsu Center for Drug Screening, China Pharmaceutical University, Nanjing 210009, China; E-Mails: (T.W.); (L.Z.)
| | - Luyong Zhang
- Jiangsu Center for Drug Screening, China Pharmaceutical University, Nanjing 210009, China; E-Mails: (T.W.); (L.Z.)
| | - Jingya Li
- National Center for Drug Screening, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 201203, China; E-Mail:
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26
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Jiang CS, Liang LF, Guo YW. Natural products possessing protein tyrosine phosphatase 1B (PTP1B) inhibitory activity found in the last decades. Acta Pharmacol Sin 2012; 33:1217-45. [PMID: 22941286 PMCID: PMC4002712 DOI: 10.1038/aps.2012.90] [Citation(s) in RCA: 153] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Accepted: 06/08/2012] [Indexed: 12/19/2022] Open
Abstract
This article provides an overview of approximately 300 secondary metabolites with inhibitory activity against protein tyrosine phosphatase 1B (PTP1B), which were isolated from various natural sources or derived from synthetic process in the last decades. The structure-activity relationship and the selectivity of some compounds against other protein phosphatases were also discussed. Potential pharmaceutical applications of several PTP1B inhibitors were presented.
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Affiliation(s)
- Cheng-shi Jiang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Lin-fu Liang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yue-wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
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27
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Sun LP, Ma WP, Gao LX, Yang LL, Quan YC, Li J, Piao HR. Synthesis and characterization of 5,7-dihydroxyflavanone derivatives as novel protein tyrosine phosphatase 1B inhibitors. J Enzyme Inhib Med Chem 2012; 28:1199-204. [DOI: 10.3109/14756366.2012.723206] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Liang-Peng Sun
- Key Laboratory of Natural Resources of Changbai Mountain & Functional Molecules, Ministry of Education, Yanbian University College of Pharmacy, Yanji, China
| | - Wei-Ping Ma
- National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Science, Chinese Academy of Sciences,
Shanghai, China
| | - Li-Xin Gao
- National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Science, Chinese Academy of Sciences,
Shanghai, China
| | - Ling-Ling Yang
- National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Science, Chinese Academy of Sciences,
Shanghai, China
| | - Ying-Chun Quan
- Key Laboratory of Natural Resources of Changbai Mountain & Functional Molecules, Ministry of Education, Yanbian University College of Pharmacy, Yanji, China
| | - Jia Li
- National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Science, Chinese Academy of Sciences,
Shanghai, China
| | - Hu-Ri Piao
- Key Laboratory of Natural Resources of Changbai Mountain & Functional Molecules, Ministry of Education, Yanbian University College of Pharmacy, Yanji, China
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Efficient synthesis of polycycles bearing prenylated, geranylated, and farnesylated citrans: application to 3′-prenylrubranine and petiolin D regioisomer. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.075] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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