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Design, synthesis, and molecular modeling of new 3(2H)-pyridazinone derivatives as acetylcholinesterase/butyrylcholinesterase inhibitors. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1930-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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152
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Tung BT, Thu DK, Thu NTK, Hai NT. Antioxidant and acetylcholinesterase inhibitory activities of ginger root (Zingiber officinale Roscoe) extract. JOURNAL OF COMPLEMENTARY & INTEGRATIVE MEDICINE 2017; 14:/j/jcim.2017.14.issue-4/jcim-2016-0116/jcim-2016-0116.xml. [PMID: 29345437 DOI: 10.1515/jcim-2016-0116] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 03/15/2017] [Indexed: 12/17/2023]
Abstract
Background Zingiber officinale Roscoe has been used in traditional medicine for the treatment of neurological disorder. This study aimed to investigate the phenolic contents, antioxidant, acetylcholinesterase enzyme (AChE) inhibitory activities of different fraction of Z. officinale root grown in Vietnam. Methods The roots of Z. officinale are extracted with ethanol 96 % and fractionated with n-hexane, ethyl acetate (EtOAc) and butanol (BuOH) solvents. These fractions evaluated the antioxidant activity by 1,1-Diphenyl -2-picrylhydrazyl (DPPH) assay and AChE inhibitory activity by Ellman's colorimetric method. Results Our data showed that the total phenolic content of EtOAc fraction was highest equivalents to 35.2±1.4 mg quercetin/g of fraction. Our data also demonstrated that EtOAc fraction had the strongest antioxidant activity with IC50 was 8.89±1.37 µg/mL and AChE inhibitory activity with an IC50 value of 22.85±2.37 μg/mL in a dose-dependent manner, followed by BuOH fraction and the n-hexane fraction is the weakest. Detailed kinetic analysis indicated that EtOAc fraction was mixed inhibition type with Ki (representing the affinity of the enzyme and inhibitor) was 30.61±1.43 µg/mL. Conclusions Our results suggest that the EtOAc fraction of Z. officinale may be a promising source of AChE inhibitors for Alzheimer's disease.
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Borah R, Saikia E, Bora SJ, Chetia B. Banana pulp extract mediated synthesis of Cu2O nanoparticles: An efficient heterogeneous catalyst for the ipso-hydroxylation of arylboronic acids. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.02.028] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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154
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Janjušević L, Karaman M, Šibul F, Tommonaro G, Iodice C, Jakovljević D, Pejin B. The lignicolous fungus Trametes versicolor (L.) Lloyd (1920): a promising natural source of antiradical and AChE inhibitory agents. J Enzyme Inhib Med Chem 2017; 32:355-362. [PMID: 28097907 PMCID: PMC6010034 DOI: 10.1080/14756366.2016.1252759] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
This study aimed to determine antiradical (DPPH• and •OH) and acetylcholinesterase (AChE) inhibitory activities along with chemical composition of autochtonous fungal species Trametes versicolor (Serbia). A total of 38 phenolic compounds with notable presence of phenolic acids were identified using HPLC/MS-MS. Its water extract exhibited the highest antiradical activity against •OH (3.21 μg/mL), among the rest due to the presence of gallic, p-coumaric and caffeic acids. At the concentration of 100 μg/mL, the same extract displayed a profound AChE inhibitory activity (60.53%) in liquid, compared to donepezil (89.05%), a drug in clinical practice used as positive control. The flavonoids baicalein and quercetin may be responsible compounds for the AChE inhibitory activity observed. These findings have demonstrated considerable potential of T. versicolor water extract as a natural source of antioxidant(s) and/or AChE inhibitor(s) to be eventually used as drug-like compounds or food supplements in the treatment of Alzheimer’s disease.
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Affiliation(s)
| | - Maja Karaman
- a Faculty of Sciences, Department of Biology and Ecology
| | - Filip Šibul
- b Department of Chemistry and Biochemistry , University of Novi Sad , Novi Sad , Serbia
| | - Giuseppina Tommonaro
- c CNR-ICB , National Research Council of Italy, Institute of Biomolecular Chemistry , Pozzuoli (Naples) , Italy
| | - Carmine Iodice
- c CNR-ICB , National Research Council of Italy, Institute of Biomolecular Chemistry , Pozzuoli (Naples) , Italy
| | - Dragica Jakovljević
- d Centre of Chemistry , Institute of Chemistry, Technology and Metallurgy, University of Belgrade , Belgrade , Serbia
| | - Boris Pejin
- e Department of Life Sciences , Institute for Multidisciplinary Research - IMSI, University of Belgrade , Belgrade , Serbia
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Tung BT, Hai NT, Thu DK. Antioxidant and acetylcholinesterase inhibitory activities in vitro of different fraction of Huperzia squarrosa (Forst.) Trevis extract and attenuation of scopolamine-induced cognitive impairment in mice. JOURNAL OF ETHNOPHARMACOLOGY 2017; 198:24-32. [PMID: 28025162 DOI: 10.1016/j.jep.2016.12.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 11/20/2016] [Accepted: 12/21/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Huperzia squarrosa (Forst.) Trevis is used in traditional medicine for improving memory deficits. Alkaloids, triterpenoids, flavonoids are main bioactive compounds of Huperzia squarrosa (Forst.) Trevis. AIM OF THE STUDY This study aimed to investigate the antioxidant, AChE inhibitory activities in vitro of differents fraction of Huperzia squarrosa (Forst.) Trevis extract and neuroprotective effects of EtOAc fraction on scopolamine-induced cognitive impairment in mice. MATERIALS AND METHODS Antioxidant activity was measured by DPPH assay. AChE inhibitory effect in vitro and detail kinetic inhibition mechanism was evaluated by Ellman's assay. For in vivo assay, mice were administrated orally EtOAc fraction (150 and 300mg/kg) for fourteen days, and injected scopolamine at a dose of 1mg/kg intraperitoneally for four days to induce memory injured. The memory behaviors were evaluated using the Morris water maze. ACh levels were measured in brain tissue. Superoxide dismutase (SOD), glutathione peroxidase (GPx) activities, malondialdehyde and protein thiol groups were also evaluated in the brains. RESULTS Our data also demonstrated that EtOAc fraction had the strongest antioxidant with an IC50 value of 9.35±1.68µg/mL and AChE inhibitory activity with an IC50 value of 23.44±3.14μg/mL in a concentration-dependent manner. Kinetic inhibition analysis indicated that EtOAc fraction was mixed inhibition type with Ki (representing the affinity of the enzyme and inhibitor) was 34.75±1.42µg/mL. Scopolamine significantly increased the escape latency time, reduced the crossings number, and swimming time in the target quadrant, while EtOAc fraction reversed these scopolamine-induced effects. EtOAc fraction significantly increased levels of acetylcholine in the brain. EtOAc fraction also significantly decreased oxidative stress in mice. CONCLUSION Our data suggest that EtOAc fraction of Huperzia squarrosa extract exhibited a strong neuroprotective effect on cognitive impairment, and may be a potential candidate for the treatment of Alzheimer.
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Affiliation(s)
- Bui Thanh Tung
- School of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam.
| | - Nguyen Thanh Hai
- School of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam.
| | - Dang Kim Thu
- School of Medicine and Pharmacy, Vietnam National University, Hanoi, Vietnam.
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156
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Richers J, Pöthig A, Herdtweck E, Sippel C, Hausch F, Tiefenbacher K. Synthesis and Neurotrophic Activity Studies of Illicium
Sesquiterpene Natural Product Analogues. Chemistry 2017; 23:3178-3183. [DOI: 10.1002/chem.201605362] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Johannes Richers
- Department Chemistry; Technical University of Munich; Lichtenbergstrasse 4 85747 Garching Germany
| | - Alexander Pöthig
- Catalysis Research Center; Technical University of Munich; Ernst-Otto-Fischer-Strasse 1 85747 Garching Germany
| | - Eberhardt Herdtweck
- Catalysis Research Center; Technical University of Munich; Ernst-Otto-Fischer-Strasse 1 85747 Garching Germany
| | - Claudia Sippel
- Department of Translational Research in Psychiatry; Max Planck Institute of Psychiatry; Kraepelinstrasse 2-10 80804 Munich Germany
| | - Felix Hausch
- Clemens-Schöpf-Institute of Organic Chemistry and Biochemistry; Technische Universität Darmstadt; Alarich-Weiss-Strasse 4 64287 Darmstadt Germany
| | - Konrad Tiefenbacher
- Department of Chemistry; University of Basel; St. Johanns-Ring 19 4056 Basel Switzerland
- Department of Biosystems Science and Engineering; ETH Zurich; Mattenstrasse 26 4058 Basel Switzerland
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157
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Figueira I, Menezes R, Macedo D, Costa I, Nunes dos Santos C. Polyphenols Beyond Barriers: A Glimpse into the Brain. Curr Neuropharmacol 2017; 15:562-594. [PMID: 27784225 PMCID: PMC5543676 DOI: 10.2174/1570159x14666161026151545] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 08/02/2016] [Accepted: 09/28/2016] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Ageing can be simply defined as the process of becoming older, which is genetically determined but also environmentally modulated. With the continuous increase of life expectancy, quality of life during ageing has become one of the biggest challenges of developed countries. The quest for a healthy ageing has led to the extensive study of plant polyphenols with the aim to prevent age-associated deterioration and diseases, including neurodegenerative diseases. The world of polyphenols has fascinated researchers over the past decades, and in vitro, cell-based, animal and human studies have attempted to unravel the mechanisms behind dietary polyphenols neuroprotection. METHODS In this review, we compiled some of the extensive and ever-growing research in the field, highlighting some of the most recent trends in the area. RESULTS The main findings regarding polypolyphenols neuroprotective potential performed using in vitro, cellular and animal studies, as well as human trials are covered in this review. Concepts like bioavailability, polyphenols biotransformation, transport of dietary polyphenols across barriers, including the blood-brain barrier, are here explored. CONCLUSION The diversity and holistic properties of polypolyphenol present them as an attractive alternative for the treatment of multifactorial diseases, where a multitude of cellular pathways are disrupted. The underlying mechanisms of polypolyphenols for nutrition or therapeutic applications must be further consolidated, however there is strong evidence of their beneficial impact on brain function during ageing. Nevertheless, only the tip of the iceberg of nutritional and pharmacological potential of dietary polyphenols is hitherto understood and further research needs to be done to fill the gaps in pursuing a healthy ageing.
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Affiliation(s)
- Inês Figueira
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras
| | - Regina Menezes
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras
- iBET, Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901 Oeiras
| | - Diana Macedo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras
- iBET, Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901 Oeiras
| | - Inês Costa
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras
- iBET, Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901 Oeiras
| | - Cláudia Nunes dos Santos
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras
- iBET, Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901 Oeiras
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158
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Wang N, Sun P, Lv M, Tong G, Jin X, Zhu X. Mustard-inspired delivery shuttle for enhanced blood–brain barrier penetration and effective drug delivery in glioma therapy. Biomater Sci 2017; 5:1041-1050. [DOI: 10.1039/c7bm00133a] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A mustard-inspired delivery shuttle was constructed for enhanced blood–brain barrier penetration and effective drug delivery in glioma therapy.
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Affiliation(s)
- Nan Wang
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Pei Sun
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Mingming Lv
- Department of Oral Maxillofacial-Head Neck Oncology
- Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Key Laboratory of Stomatology
- Shanghai 200011
| | - Gangsheng Tong
- Instrumental Analysis Center
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Xin Jin
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
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159
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Effect of Chinese Herbal Medicine on Alzheimer's Disease. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2017; 135:29-56. [DOI: 10.1016/bs.irn.2017.02.003] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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160
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Babashpour-Asl M, Zakizadeh H, Nazemiyeh H, Motallebi-Azar A. In Vitro Micropropagation and Alkaloid Production of Galanthus transcaucasicus Fomin. PHARMACEUTICAL SCIENCES 2016. [DOI: 10.15171/ps.2016.41] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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161
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Wang Z, Tao S, Dong X, Sun Y. para-Sulfonatocalix[n]arenes Inhibit Amyloid β-Peptide Fibrillation and Reduce Amyloid Cytotoxicity. Chem Asian J 2016; 12:341-346. [DOI: 10.1002/asia.201601461] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 11/24/2016] [Indexed: 01/20/2023]
Affiliation(s)
- Ziyuan Wang
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering; Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300354 P.R. China
| | - Shipeng Tao
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering; Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300354 P.R. China
| | - Xiaoyan Dong
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering; Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300354 P.R. China
| | - Yan Sun
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering; Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300354 P.R. China
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162
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Kongkiatpaiboon S, Duangdee N, Prateeptongkum S, Chaijaroenkul W. Acetylcholinesterase Inhibitory Activity of Alkaloids Isolated from Stephania venosa. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601101208] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Stephania venosa (Blume) Spreng or “Sa-Bu-Leud” is a Thai medicinal plant used for treatment of cancer and diabetes, and as a blood-tonic and aphrodisiac. This plant contains alkaloids as its major components and has been of interest for its acetylcholinesterase (AChE) inhibitory activity. Phytochemical screening of S. venosa was made using HPLC analysis and showed the chemical variation between the same species from different provenances. Fractionation of S. venosa extract yielded three alkaloids, namely, dicentrine, crebanine, and tetrahydropalmatine. AChE inhibitory potential of the isolated alkaloids was evaluated using Ellman's AChE inhibition assay. Dicentrine, crebanine, and tetrahydropalmatine inhibited AChE activity with IC50 values of 93.5, 86.6, and 168.6 μg/mL, respectively. The AChE inhibitory activity of the tertiary protoberberine alkaloid, tetrahydropalmatine, was lower than that of the aporphine alkaloids, dicentrine and crebanine, whereas the quaternary protoberberine alkaloid, berberine, showed a higher AChE inhibitory effect than the others.
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Affiliation(s)
- Sumet Kongkiatpaiboon
- Drug Discovery and Development Center, Thammasat University (Rangsit Campus), Pathumthani 12121, Thailand
| | - Nongnaphat Duangdee
- Drug Discovery and Development Center, Thammasat University (Rangsit Campus), Pathumthani 12121, Thailand
| | - Saisuree Prateeptongkum
- Department of Chemistry, Faculty of Science and Technology, Thammasat University (Rangsit Campus), Pathumthani 12121, Thailand
| | - Wanna Chaijaroenkul
- Center of Excellence in Pharmacology and Molecular Biology of Malaria and Cholaniocarcinoma, Chulabhorn International College of Medicine, Thammasat University (Rangsit Campus), Pathumthani 12121, Thailand
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163
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Verbascum phlomoides and Solidago virgaureae herbs as natural source for preventing neurodegenerative diseases. J Herb Med 2016. [DOI: 10.1016/j.hermed.2016.08.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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164
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Cao G, Su P, Zhang S, Guo L, Zhang H, Liang Y, Qin C, Zhang W. Ginsenoside Re reduces Aβ production by activating PPARγ to inhibit BACE1 in N2a/APP695 cells. Eur J Pharmacol 2016; 793:101-108. [PMID: 27840193 DOI: 10.1016/j.ejphar.2016.11.006] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 10/23/2016] [Accepted: 11/03/2016] [Indexed: 12/21/2022]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease characterized by β-amyloid protein (Aβ) deposition. Reducing the Aβ load may be a new perspective for AD treatment. Ginsenoside Re is an extract from Panax notoginseng, which is a well-known traditional Chinese medicine that has been used for the treatment of various diseases for years. Ginsenoside Re has been reported to decrease Aβ in Alzheimer's disease animal models, but the mechanism has not been fully elucidated. In the present study, we investigated the mechanism of ginsenoside Re. Our results showed that ginsenoside Re decreased the Aβ levels in N2a/APP695 cells. Aβ peptides are generated by β-secretase (β-site amyloid precursor protein cleaving enzyme 1 (BACE1)) and γ-secretase. We found that ginsenoside Re decreased the BACE1 mRNA and protein levels and inhibited BACE1 activity in the N2a/APP695 cells. Peroxisome proliferator-activated receptor-γ (PPARγ) is a transcription factor that regulates the activity of the BACE1 promoter, and activating PPARγ can inhibit BACE1. The results also showed that ginsenoside Re significantly increased the PPARγ protein and mRNA levels. These effects of ginsenoside Re on BACE1 could be effectively inhibited by the PPARγ antagonist GW9662. These findings indicate that ginsenoside Re inhibits BACE1 through activation of PPARγ, which ultimately reduces the generation of Aβ1-40 and Aβ1-42. Therefore, ginsenoside Re may be a promising agent for the modulation of Aβ-related pathology in AD.
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Affiliation(s)
- Guoqiong Cao
- Beijing Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Beijing 100088, China; Engineering Research Center of Natural Medicine, Ministry of Education, Beijing Normal University, Beijing 100088, China; College of Resources Science Technology, Beijing Normal University, Beijing 100875, China
| | - Ping Su
- Beijing Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Beijing 100088, China; Engineering Research Center of Natural Medicine, Ministry of Education, Beijing Normal University, Beijing 100088, China; College of Resources Science Technology, Beijing Normal University, Beijing 100875, China
| | - Shuai Zhang
- Beijing Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Beijing 100088, China; Engineering Research Center of Natural Medicine, Ministry of Education, Beijing Normal University, Beijing 100088, China; College of Resources Science Technology, Beijing Normal University, Beijing 100875, China
| | - Limin Guo
- Beijing Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Beijing 100088, China; Engineering Research Center of Natural Medicine, Ministry of Education, Beijing Normal University, Beijing 100088, China; College of Resources Science Technology, Beijing Normal University, Beijing 100875, China
| | - Haijing Zhang
- Beijing Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Beijing 100088, China; Engineering Research Center of Natural Medicine, Ministry of Education, Beijing Normal University, Beijing 100088, China; College of Resources Science Technology, Beijing Normal University, Beijing 100875, China
| | - Yuexia Liang
- Beijing Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Beijing 100088, China; Engineering Research Center of Natural Medicine, Ministry of Education, Beijing Normal University, Beijing 100088, China; College of Resources Science Technology, Beijing Normal University, Beijing 100875, China
| | - Chunxia Qin
- Beijing Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Beijing 100088, China; Engineering Research Center of Natural Medicine, Ministry of Education, Beijing Normal University, Beijing 100088, China; College of Resources Science Technology, Beijing Normal University, Beijing 100875, China
| | - Wensheng Zhang
- Beijing Area Major Laboratory of Protection and Utilization of Traditional Chinese Medicine, Beijing Normal University, Beijing 100088, China; Engineering Research Center of Natural Medicine, Ministry of Education, Beijing Normal University, Beijing 100088, China; College of Resources Science Technology, Beijing Normal University, Beijing 100875, China; National & Local United Engineering Research Center for Sanqi Resources Protection and Utilization Technology, Kunming 650000, China.
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165
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Yoshioka T, Murakami K, Ido K, Hanaki M, Yamaguchi K, Midorikawa S, Taniwaki S, Gunji H, Irie K. Semisynthesis and Structure-Activity Studies of Uncarinic Acid C Isolated from Uncaria rhynchophylla as a Specific Inhibitor of the Nucleation Phase in Amyloid β42 Aggregation. JOURNAL OF NATURAL PRODUCTS 2016; 79:2521-2529. [PMID: 27700077 DOI: 10.1021/acs.jnatprod.6b00392] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Oligomers of the 42-mer amyloid-β protein (Aβ42), rather than fibrils, cause synaptic dysfunction in the pathology of Alzheimer's disease (AD). The nucleation phase in a nucleation-dependent aggregation model of Aβ42 is related to the formation of oligomers. Uncaria rhynchophylla is one component of "Yokukansan", a Kampo medicine, which is widely used for treating AD symptoms. Previously, an extract of U. rhynchophylla was found to reduce the aggregation of Aβ42, but its active principles have yet to be identified. In the present work, uncarinic acid C (3) was identified as an inhibitor of Aβ42 aggregation that is present in U. rhynchophylla. Moreover, compound 3 acted as a specific inhibitor of the nucleation phase of Aβ42 aggregation. Compound 3 was synthesized from saponin A (10), an abundant byproduct of rutin purified from Uncaria elliptica. Comprehensive structure-activity studies on 3 suggest that both a C-27 ferulate and a C-28 carboxylic acid group are required for its inhibitory activity. These findings may aid the development of oligomer-specific inhibitors for AD therapy.
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Affiliation(s)
- Takuya Yoshioka
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University , Kyoto 606-8502, Japan
| | - Kazuma Murakami
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University , Kyoto 606-8502, Japan
| | - Kyohei Ido
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University , Kyoto 606-8502, Japan
| | - Mizuho Hanaki
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University , Kyoto 606-8502, Japan
| | - Kanoko Yamaguchi
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University , Kyoto 606-8502, Japan
| | | | - Shinji Taniwaki
- Alps-Pharmaceutical Industry Co., Ltd. , Gifu 509-4241, Japan
| | - Hiroki Gunji
- Alps-Pharmaceutical Industry Co., Ltd. , Gifu 509-4241, Japan
| | - Kazuhiro Irie
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University , Kyoto 606-8502, Japan
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166
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Ketcham JM, Volchkov I, Chen TY, Blumberg PM, Kedei N, Lewin NE, Krische MJ. Evaluation of Chromane-Based Bryostatin Analogues Prepared via Hydrogen-Mediated C-C Bond Formation: Potency Does Not Confer Bryostatin-like Biology. J Am Chem Soc 2016; 138:13415-13423. [PMID: 27676096 PMCID: PMC5094189 DOI: 10.1021/jacs.6b08695] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis and biological evaluation of chromane-containing bryostatin analogues WN-2-WN-7 and the previously reported salicylate-based analogue WN-8 are described. Analogues WN-2-WN-7 are prepared through convergent assembly of the chromane-containing fragment B-I with the "binding domain" fragment A-I or its C26-des-methyl congener, fragment A-II. The synthesis of fragment B-I features enantioselective double C-H allylation of 1,3-propanediol to form the C2-symmetric diol 3 and Heck cyclization of bromo-diene 5 to form the chromane core. The synthesis of salicylate WN-8 is accomplished through the union of fragments A-III and B-II. The highest binding affinities for PKCα are observed for the C26-des-methyl analogues WN-3 (Ki = 63.9 nM) and WN-7 (Ki = 63.1 nM). All analogues, WN-2-WN-8, inhibited growth of Toledo cells, with the most potent analogue being WN-7. This response, however, does not distinguish between phorbol ester-like and bryostatin-like behavior. In contrast, while many of the analogues contain a conserved C-ring in the binding domain and other features common to analogues with bryostatin-like properties, all analogues evaluated in the U937 proliferation and cell attachment assays displayed phorbol ester-like and/or toxic behavior, including WN-8, for which "bryostatin-like PKC modulatory activities" previously was suggested solely on the basis of PKC binding. These results underscore the importance of considering downstream biological effects, as tumor suppression cannot be inferred from potent PKC binding.
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Affiliation(s)
- John M. Ketcham
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, TX 78712, USA
| | - Ivan Volchkov
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, TX 78712, USA
| | - Te-Yu Chen
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, TX 78712, USA
| | - Peter M. Blumberg
- Laboratory of Cancer Biology and Genetics, NCI, National Institutes of Health, Bethesda, MD 20892-4255, USA
| | - Noemi Kedei
- Laboratory of Cancer Biology and Genetics, NCI, National Institutes of Health, Bethesda, MD 20892-4255, USA
| | - Nancy E. Lewin
- Laboratory of Cancer Biology and Genetics, NCI, National Institutes of Health, Bethesda, MD 20892-4255, USA
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry and Biochemistry, Austin, TX 78712, USA
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167
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Gu C, Yang X, Huang L. Cistanches Herba: A Neuropharmacology Review. Front Pharmacol 2016; 7:289. [PMID: 27703431 PMCID: PMC5028387 DOI: 10.3389/fphar.2016.00289] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 08/18/2016] [Indexed: 12/21/2022] Open
Abstract
Cistanches Herba (family Orobanchaceae), commonly known as “desert ginseng” or Rou Cong Rong, is a global genus and commonly used for its neuroprotective, immunomodulatory, anti-oxidative, kidney impotence, laxative, anti-inflammatory, hepatoprotective, anti-bacterial, anti-viral, and anti-tumor effects in traditional herbal formulations in North Africa, Arabic, and Asian countries. The major bioactive compound present in this plant is phenylethanoid glycosides. In recent years, there has been great important in scientific investigation of the neuropharmacological effects of the bioactive compounds. The in vitro and in vivo studies suggests these compounds demonstrate neuropharmacological activities against a wide range of complex nervous system diseases which occurs through different mechanisms include improving immunity function and kidney aging, anti-lipid peroxidation, scavenging free radical, inducing the activation of caspase-3 and caspase-8. This review aims to summaries the various neuropharmacological effects and mechanisms of Cistanches Herba extracts and related compounds, including its efficacy as a cure for Alzheimer’s disease and Parkinson’s disease with reference to the published literature. Which provides guidance for further research on the clinical application of Cistanches Herba.
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Affiliation(s)
- Caimei Gu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College Beijing, China
| | - Xianying Yang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College Beijing, China
| | - Linfang Huang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College Beijing, China
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168
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Chen J, Tao LX, Xiao W, Ji SS, Wang JR, Li XW, Zhang HY, Guo YW. Design, synthesis and biological evaluation of novel chiral oxazino-indoles as potential and selective neuroprotective agents against Aβ25–35-induced neuronal damage. Bioorg Med Chem Lett 2016; 26:3765-9. [DOI: 10.1016/j.bmcl.2016.05.061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 05/09/2016] [Accepted: 05/21/2016] [Indexed: 12/21/2022]
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169
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Liang Z, Zhang B, Su WW, Williams PG, Li QX. C-Glycosylflavones Alleviate Tau Phosphorylation and Amyloid Neurotoxicity through GSK3β Inhibition. ACS Chem Neurosci 2016; 7:912-23. [PMID: 27213824 DOI: 10.1021/acschemneuro.6b00059] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Alzheimer's disease (AD) is the most common brain disorder worldwide. Aberrant tau hyperphosphorylation and accumulation play critical roles in the formation of neurofibrillary tangles highly associated with neuronal dysfunction and cognitive impairment in AD pathogenesis. Glycogen synthase kinase-3β (GSK3β) is a key kinase responsible for tau hyperphosphorylation. Selective inhibition of GSK3β is a promising strategy in AD therapy. Corn silks (CS, Zea mays L.) have been traditionally used as a medicinal herb and recently noted for their potentially cognitive benefits. However, the neuroprotective components of CS and their molecular mechanism have received little attention to date. As part of our effort screening phytochemicals against a broad panel of kinases targeting AD tauopathy, we found inhibition of GSK3β by CS extracts. Subsequent bioassay-guided fractionation led to the isolation and identification of two 6-C-glycosylflavones, isoorientin (1) and 3'-methoxymaysin (2), with selective inhibition against GSK3β in vitro. Enzyme kinetics and molecular docking studies demonstrated that 1 specifically inhibited GSK3β via an ATP noncompetitive mechanism, acting as a substrate competitive inhibitor of GSK3β. Further in vitro cellular studies demonstrated that 1 effectively attenuated tau phosphorylation mediated by GSK3β and was neuroprotective against β-amyloid-induced tau hyperphosphorylation and neurotoxicity in SH-SY5Y cells. The C-glycosylflavones represent new lead candidates with a novel mechanism of action for the development of AD phytopharmaceuticals.
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Affiliation(s)
- Zhibin Liang
- Department of Molecular Biosciences and Bioengineering, and ‡Department of
Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Bei Zhang
- Department of Molecular Biosciences and Bioengineering, and ‡Department of
Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Wei Wen Su
- Department of Molecular Biosciences and Bioengineering, and ‡Department of
Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Philip G. Williams
- Department of Molecular Biosciences and Bioengineering, and ‡Department of
Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Qing X. Li
- Department of Molecular Biosciences and Bioengineering, and ‡Department of
Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
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170
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Bilal S, Khan AL, Waqas M, Shahzad R, Kim ID, Lee IJ, Shin DH. Biochemical Constituents and in Vitro Antioxidant and Anticholinesterase Potential of Seeds from Native Korean Persimmon Genotypes. Molecules 2016; 21:E893. [PMID: 27399664 PMCID: PMC6274387 DOI: 10.3390/molecules21070893] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 06/30/2016] [Accepted: 07/01/2016] [Indexed: 01/16/2023] Open
Abstract
In the current study, the functional and biochemical potential of the seeds of four persimmon cultivars (PC1, PC2, PC3 and PC4) and their role against oxidative stress and acetylcholinesterase (AChE) inhibition were evaluated. In terms of biochemical compositions, free amino acids, fatty acids and organic acids analysis was performed. The free amino acids ranged from 2617.31 (PC2) to 3773.01 μg∙g(-1) dry weight (PC4). Oleic acid and linoleic acid were the principal fatty acids, which were significantly higher in PC4 and PC1, respectively. PC4 presented the highest amount of organic acid content (4212 mg∙kg(-1)), whereas PC2 presented the lowest (2498 mg∙kg(-1)). PC2 contained higher total phenolic content and flavonoid content, whereas PC3 had the lowest amount as compared to other cultivars. The in vitro DPPH, ABTS and superoxide anion radicals scavenging activity increased in a dose-dependent manner, whereas PC2 showed significantly higher scavenging activities as compared to PC1, PC2 and PC4 types. In the case of AChE inhibition, PC4 showed a moderate activity (67.34% ± 1.8%). In conclusion, the current findings reveal that the studied persimmon seeds cultivars are a source of bioactive natural antioxidants and AChE inhibitors. Such natural products could be employed in pharmaceutical and food industries, whilst can also be considered for the treatment of neurodegenerative diseases such as Alzheimer's.
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Affiliation(s)
- Saqib Bilal
- School of Applied Biosciences, Kyungpook National University, Daegu 41566, Korea.
| | - Abdul Latif Khan
- UoN Chair of Oman's Medicinal Plants & Marine Natural Products, University of Nizwa, Nizwa 616, Oman.
| | - Muhammad Waqas
- School of Applied Biosciences, Kyungpook National University, Daegu 41566, Korea.
- Department of Agriculture, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan.
| | - Raheem Shahzad
- School of Applied Biosciences, Kyungpook National University, Daegu 41566, Korea.
| | - Il-Doo Kim
- International Institute of Agriculture Research & Development, Kyungpook National University, Daegu 41566, Korea.
| | - In-Jung Lee
- School of Applied Biosciences, Kyungpook National University, Daegu 41566, Korea.
| | - Dong-Hyun Shin
- School of Applied Biosciences, Kyungpook National University, Daegu 41566, Korea.
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171
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Lai Y, Zeng H, He M, Qian H, Wu Z, Luo Z, Xue Y, Yao G, Zhang Y. 6,8-Di-C-methyl-flavonoids with neuroprotective activities from Rhododendron fortunei. Fitoterapia 2016; 112:237-43. [DOI: 10.1016/j.fitote.2016.06.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 06/17/2016] [Accepted: 06/20/2016] [Indexed: 10/21/2022]
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172
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Ye C, Zhong X, Wang MQ, Chai Y, Yuan R. Cyclovoltammetric acetylcholinesterase activity assay after inhibition and subsequent reactivation by using a glassy carbon electrode modified with palladium nanorods composited with functionalized C60 fullerene. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1888-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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173
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Zengin G, Degirmenci NS, Alpsoy L, Aktumsek A. Evaluation of antioxidant, enzyme inhibition, and cytotoxic activity of three anthraquinones (alizarin, purpurin, and quinizarin). Hum Exp Toxicol 2016; 35:544-53. [PMID: 26178874 DOI: 10.1177/0960327115595687] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The aim of this work was to investigate the cytotoxic, antioxidative, and enzyme inhibition effects of alizarin, quinizarin, and purpurin, which are anthraquinones (AQ). METHODS Cytotoxic effects were evaluated with cell inhibition rate by 3-(4,5-dimethylthiazol- 2-yl)-2,5-diphenyltetrazolium bromide assay. Different chemical assays, including free radical scavenging activity (1,1-diphenyl-2-picrylhydrazyl and 2,2-azino-bis(3-ethylbenzothiazloine-6-sulfonic acid)), phosphomolybdenum and reducing power (ferric reducing antioxidant power and cupric ion reducing activity), were used to evaluate the antioxidant properties. Moreover, enzyme inhibitory activities were analyzed against acetylcholinesterase, butrylcholinesterase, tyrosinase, α-amylase, and α-glucosidase. RESULTS These components have antioxidant and enzyme inhibition activity. Especially, purpurin showed the strongest antioxidant and good enzyme inhibitory effects. According to our cytotoxicity results, alizarin, purpurin, and quinizarin induced dose- and time-dependent cell proliferation. Furthermore, when we applied AQs with mitomycin C (MC) on L929 cell line, we demonstrated that cell proliferation in MC-AQ groups compared with MC group was increased. The most effective component was alizarin at 100 µM concentration. These AQs showed positive effects on L929 cell lines with high half-maximal inhibitory concentration values. CONCLUSION Our results demonstrate that AQs may be used as antioxidative compounds in food and medicinal applications.
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Affiliation(s)
- G Zengin
- Department of Biology, Faculty of Science, Selcuk University, Konya, Turkey
| | - N S Degirmenci
- Department of Biology, Faculty of Science and Art, Fatih University, Istanbul, Turkey
| | - L Alpsoy
- Department of Medical Biology, Faculty of Medicine, Fatih University, Istanbul, Turkey
| | - A Aktumsek
- Department of Biology, Faculty of Science, Selcuk University, Konya, Turkey
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174
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Cheenpracha S, Jitonnom J, Komek M, Ritthiwigrom T, Laphookhieo S. Acetylcholinesterase inhibitory activity and molecular docking study of steroidal alkaloids from Holarrhena pubescens barks. Steroids 2016; 108:92-8. [PMID: 26850468 DOI: 10.1016/j.steroids.2016.01.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 01/28/2016] [Accepted: 01/31/2016] [Indexed: 11/23/2022]
Abstract
An alkaloidal extract of the bark of Holarrhena pubescens showed several inhibition zones of acetylcholinesterase (AChE) inhibitor, using a bioautographic assay. Activity-guided fractionation afforded three new steroidal alkaloids, mokluangins A-C (1-3), together with three known compounds, antidysentericine (4), holaphyllamine (5), methylholaphyllamine (6). All structures were elucidated by analysis of NMR and MS spectroscopic data. Compound 2 showed moderate antibacterial activity against Bacillus subtilis and Escherichia coli with the MIC value of 16 μg/mL, while compound 3 exhibited moderate selective activity against E. coli with the MIC value of 16 μg/mL. In addition, compounds 1-4 also showed strong AChE inhibiting activity with IC50 values ranging from 1.44 to 23.22 μM. Molecular docking calculations were also performed and the results demonstrated that all compounds can bind at the aromatic gorge of AChE with estimated binding free energies correlated well with the in vitro inhibitory profiles. Hydrophobic and hydrogen bonding interactions contribute mainly to the binding of the alkaloids where the substituents at C-3 serving as key functional groups for the AChE inhibition. Our results will allow the development of new AChE-inhibitors based on steroidal alkaloid skeleton bearing the cyclic amide moiety.
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Affiliation(s)
- Sarot Cheenpracha
- Division of Chemistry, School of Science, University of Phayao, Maeka, Muang, Phayao 56000, Thailand.
| | - Jitrayut Jitonnom
- Division of Chemistry, School of Science, University of Phayao, Maeka, Muang, Phayao 56000, Thailand
| | - Manutchaya Komek
- Division of Chemistry, School of Science, University of Phayao, Maeka, Muang, Phayao 56000, Thailand
| | - Thunwadee Ritthiwigrom
- Department of Chemistry, Faculty of Science, Chiang Mai University, Sutep, Muang, Chiang Mai 50200, Thailand
| | - Surat Laphookhieo
- Natural Products Research Laboratory, School of Science, Mae Fah Luang University, Tasud, Muang, Chiang Rai 57100, Thailand
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175
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Choi SJ, Oh SS, Kim CR, Kwon YK, Suh SH, Kim JK, Park GG, Son SY, Shin DH. Perilla frutescens Extract Ameliorates Acetylcholinesterase and Trimethyltin Chloride-Induced Neurotoxicity. J Med Food 2016; 19:281-9. [DOI: 10.1089/jmf.2015.3540] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Soo Jung Choi
- Functional Food Research Center, Korea University, Seoul, Korea
| | - Seung Sang Oh
- Department of Food and Biotechnology, Korea University, Seoul, Korea
| | - Cho Rong Kim
- Functional Food Research Center, Korea University, Seoul, Korea
| | - Yoon Kyung Kwon
- Department of Food and Biotechnology, Korea University, Seoul, Korea
| | - Soo Hwan Suh
- National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Chungbuk, Korea
| | - Jae Kyeom Kim
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, Minnesota, USA
| | - Gwi Gun Park
- Department of Food Science and Biotechnology, Gachon University, Gyeonggi, Korea
| | - Seung-Yeol Son
- Department of Microbiology, Dankook University, Chungnam, Korea
| | - Dong-Hoon Shin
- Department of Food and Biotechnology, Korea University, Seoul, Korea
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176
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Yao R, Rong G, Yan B, Qiu L, Xu X. Dual-Functionalization of Alkynes via Copper-Catalyzed Carbene/Alkyne Metathesis: A Direct Access to the 4-Carboxyl Quinolines. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02648] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ruwei Yao
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Guangwei Rong
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Bin Yan
- Jinghua Anti-Cancer
Pharmaceutical Engineering Center, Nantong 226407, China
| | - Lihua Qiu
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xinfang Xu
- Key
Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry,
Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- Jinghua Anti-Cancer
Pharmaceutical Engineering Center, Nantong 226407, China
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177
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Yang YD, Cheng XM, Liu W, Han ZZ, Chou GX, Wang Y, Sun DX, Wang ZT, Wang CH. Peganumine B-I and two enantiomers: new alkaloids from the seeds of Peganum harmala Linn. and their potential cytotoxicity and cholinesterase inhibitory activities. RSC Adv 2016. [DOI: 10.1039/c6ra00086j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ten new alkaloids (peganumine B-I and two enantiomers), containing five β-carbolines, three quinazolones, two compounds with both of the above skeletons, and one amphoteric alkaloid with a four-membered ring, were isolated from Peganum harmala.
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Affiliation(s)
- Ya-di Yang
- Institute of Chinese Materia Medica
- Shanghai University of Traditional Chinese Medicine
- The MOE Key Laboratory for Standardization of Chinese Medicines
- The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine
- Shanghai 201203
| | - Xue-mei Cheng
- Institute of Chinese Materia Medica
- Shanghai University of Traditional Chinese Medicine
- The MOE Key Laboratory for Standardization of Chinese Medicines
- The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine
- Shanghai 201203
| | - Wei Liu
- Institute of Chinese Materia Medica
- Shanghai University of Traditional Chinese Medicine
- The MOE Key Laboratory for Standardization of Chinese Medicines
- The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine
- Shanghai 201203
| | - Zhu-zhen Han
- Institute of Chinese Materia Medica
- Shanghai University of Traditional Chinese Medicine
- The MOE Key Laboratory for Standardization of Chinese Medicines
- The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine
- Shanghai 201203
| | - Gui-xin Chou
- Institute of Chinese Materia Medica
- Shanghai University of Traditional Chinese Medicine
- The MOE Key Laboratory for Standardization of Chinese Medicines
- The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine
- Shanghai 201203
| | - Ying Wang
- College of Pharmacy
- Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- China
| | - Du-xin Sun
- College of Pharmacy
- The University of Michigan
- Ann Arbor
- USA
| | - Zheng-tao Wang
- Institute of Chinese Materia Medica
- Shanghai University of Traditional Chinese Medicine
- The MOE Key Laboratory for Standardization of Chinese Medicines
- The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine
- Shanghai 201203
| | - Chang-hong Wang
- Institute of Chinese Materia Medica
- Shanghai University of Traditional Chinese Medicine
- The MOE Key Laboratory for Standardization of Chinese Medicines
- The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine
- Shanghai 201203
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178
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Search for Nootropic Substances Based on Molecular Docking of Methanepyrido[1,2-a][1, 5]Diazocin[(-)-Cytisine] Derivatives to the Active Center of the Nicotinic Acetylcholine Receptor. Pharm Chem J 2015. [DOI: 10.1007/s11094-015-1333-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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179
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Hu J, Lin T, Xu J, Ding R, Wang G, Shen R, Zhang YW, Chen H. Polyphenols isolated from leaves of Vitis thunbergii var. taiwaniana regulate APP related pathway. Bioorg Med Chem Lett 2015; 26:505-511. [PMID: 26675439 DOI: 10.1016/j.bmcl.2015.11.085] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 10/23/2015] [Accepted: 11/24/2015] [Indexed: 01/21/2023]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder characterized by the accumulation of amyloid plaques and neurofibrillary tangles in the brain. The major component of the plaques, amyloid-β (Aβ), is generated from amyloid-β precursor protein (APP) by β- and γ-secretase-mediated cleavages. Multiple lines of evidence demonstrate that overproduction/accumulation of Aβ in vulnerable brain regions is a primary cause of the pathogenesis of AD. Among the twelve polyphenols isolated from the leaf extracts of Vitis thunbergii var. taiwaniana (VTT), stenophyllol C, stenophyllol B, ampelopsin C, vitisin A, and davidiol A were shown to significantly reduce both Aβ40 and Aβ42 levels in N2a695 cells. Further studies revealed that ampelopsin C and vitisin A reduce Aβ production through inhibiting β-secretase activity, while the effects of the other active polyphenols on reducing Aβ generation are through different mechanisms. These results suggest that VTT extracts may be beneficial for AD prevention and treatment.
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Affiliation(s)
- Jin Hu
- School of Pharmaceutical Sciences, Xiamen University, South Xiangan Road, Xiamen, Fujian 361102, China; Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, South Xiangan Road, Xiamen, Fujian 361102, China; School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Ting Lin
- School of Pharmaceutical Sciences, Xiamen University, South Xiangan Road, Xiamen, Fujian 361102, China
| | - Junyue Xu
- School of Pharmaceutical Sciences, Xiamen University, South Xiangan Road, Xiamen, Fujian 361102, China
| | - Rong Ding
- School of Pharmaceutical Sciences, Xiamen University, South Xiangan Road, Xiamen, Fujian 361102, China
| | - Guanghui Wang
- School of Pharmaceutical Sciences, Xiamen University, South Xiangan Road, Xiamen, Fujian 361102, China
| | - Ruichi Shen
- Fujian Institute of Subtropical Botany, Jiahe Road 800, Xiamen, Fujian 361006, China
| | - Yun-Wu Zhang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, South Xiangan Road, Xiamen, Fujian 361102, China.
| | - Haifeng Chen
- School of Pharmaceutical Sciences, Xiamen University, South Xiangan Road, Xiamen, Fujian 361102, China.
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180
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Cui L, Wang Y, Liu Z, Chen H, Wang H, Zhou X, Xu J. Discovering New Acetylcholinesterase Inhibitors by Mining the Buzhongyiqi Decoction Recipe Data. J Chem Inf Model 2015; 55:2455-63. [DOI: 10.1021/acs.jcim.5b00449] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lu Cui
- School
of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Yu Wang
- Department
of Pharmacology, Institute of Medical Sciences, Shanghai Jiao Tong University, School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
| | - Zhihong Liu
- School
of Pharmaceutical Sciences, Sun Yat-Sen University, 132 East
Circle Road at University City, Guangzhou 510006, China
| | - Hongzhuan Chen
- Department
of Pharmacology, Institute of Medical Sciences, Shanghai Jiao Tong University, School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
| | - Hao Wang
- Department
of Pharmacology, Institute of Medical Sciences, Shanghai Jiao Tong University, School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
| | - Xinxin Zhou
- School
of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Jun Xu
- School
of Pharmaceutical Sciences, Sun Yat-Sen University, 132 East
Circle Road at University City, Guangzhou 510006, China
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181
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Sirimangkalakitti N, Olatunji OJ, Changwichit K, Saesong T, Chamni S, Chanvorachote P, Ingkaninan K, Plubrukarn A, Suwanborirux K. Bromotyrosine Alkaloids with Acetylcholinesterase Inhibitory Activity from the Thai Sponge Acanthodendrilla sp. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501001135] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Twenty bromotyrosine alkaloids, including a new compound, 13-oxosubereamolline D (5), were isolated from the Thai sponge Acanthodendrilla sp. Their structures were determined by analyses of 1D- and 2D-NMR, high-resolution mass, and circular dichroism data. The complete 1H and 13C NMR assignments of 5,7β-dichlorocavernicolin (19) and 5,7α-dichlorocavernicolin (20) are described herein for the first time. The acetylcholinesterase (AChE) inhibitory activity of all isolated compounds was evaluated. Only homoaerothionin (7) and fistularin 1 (10) exhibited inhibitory activity against human recombinant AChE ( hrAChE) with IC50s of 4.5 and 47.5 μM, respectively. The hrAChE inhibition kinetics of 7, the most potent alkaloid, showed increased K m and unchanged V max values, suggesting its competitive mode of inhibition. The spirocyclohexadienylisoxazole and the length of the alkyl diamine linkage were proposed as the crucial parts for its strong inhibitory activity. This finding indicates a therapeutic potential for 7 in acetylcholine-related diseases, most importantly Alzheimer's disease.
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Affiliation(s)
- Natchanun Sirimangkalakitti
- Center for Bioactive Natural Products from Marine Organisms and Endophytic Fungi (BNPME), Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand
| | - Opeyemi J. Olatunji
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
| | - Kanokwan Changwichit
- Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences and Center of Excellence for Innovation in Chemistry, Naresuan University, Phitsanulok 65000, Thailand
| | - Tongchai Saesong
- Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences and Center of Excellence for Innovation in Chemistry, Naresuan University, Phitsanulok 65000, Thailand
| | - Supakarn Chamni
- Center for Bioactive Natural Products from Marine Organisms and Endophytic Fungi (BNPME), Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand
| | - Pithi Chanvorachote
- Cell-Based Drug and Health Product Development Research Unit and Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kornkanok Ingkaninan
- Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences and Center of Excellence for Innovation in Chemistry, Naresuan University, Phitsanulok 65000, Thailand
| | - Anuchit Plubrukarn
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
| | - Khanit Suwanborirux
- Center for Bioactive Natural Products from Marine Organisms and Endophytic Fungi (BNPME), Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand
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182
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Pejin B, Ciric A, Markovic D, Tommonaro G, Sokovic M. In vitro avarol does affect the growth of Candida sp. Nat Prod Res 2015; 30:1956-60. [PMID: 26405848 DOI: 10.1080/14786419.2015.1091454] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This work extends in vitro screening of antimicrobial activity of avarol, the marine natural product firstly isolated from the Mediterranean sponge Dysidea avara. Its anticandidial activity was evaluated by microdilution method against eight Candida strains, two ATCC and six clinical ones. At a different extent this compound was proven to be active against all the strains tested (MIC 0.8-6.0 μg/mL and MFC 1.6-12.0 μg/mL, respectively). According to the best of our knowledge, this is the first report on avarol activity towards any yeast strain which may be of relevance for Alzheimer's disease. Indeed, avarol derivatives showing moderate AChE activity should be screened for anticandidial activity both in vitro and in vivo.
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Affiliation(s)
- Boris Pejin
- a Institute of Biomolecular Chemistry, CNR-ICB , National Research Council of Italy , Pozzuoli-Naples , Italy.,b Department of Life Sciences, Institute for Multidisciplinary Research - IMSI , University of Belgrade , Belgrade , Serbia
| | - Ana Ciric
- c Mycological Laboratory, Department of Plant Physiology, Institute for Biological Research 'Sinisa Stankovic', IBISS , University of Belgrade , Belgrade , Serbia
| | - Dejan Markovic
- d Faculty of Dental Medicine, Department of Pediatric and Preventive Dentistry , University of Belgrade , Belgrade , Serbia
| | - Giuseppina Tommonaro
- a Institute of Biomolecular Chemistry, CNR-ICB , National Research Council of Italy , Pozzuoli-Naples , Italy
| | - Marina Sokovic
- c Mycological Laboratory, Department of Plant Physiology, Institute for Biological Research 'Sinisa Stankovic', IBISS , University of Belgrade , Belgrade , Serbia
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183
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Tu Y, Zhong Y, Du H, Luo W, Wen Y, Li Q, Zhu C, Li Y. Anticholinesterases and antioxidant alkamides from Piper nigrum fruits. Nat Prod Res 2015; 30:1945-9. [DOI: 10.1080/14786419.2015.1089243] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Yanbei Tu
- School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Yujiao Zhong
- School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Hongjian Du
- School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Wei Luo
- School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Yaya Wen
- School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Qin Li
- School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Chao Zhu
- School of Chemical Engineering, Sichuan University, Chengdu, China
| | - Yanfang Li
- School of Chemical Engineering, Sichuan University, Chengdu, China
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184
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Abourashed EA, Abraha A, Khan SI, McCants T, Awan S. Potential of Horse Apple Isoflavones in Targeting Inflammation and Tau Protein Fibrillization. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In our ongoing search for anti-inflammatory and neuroprotective agents of natural origin, the total methanolic extract (MPE) of horse apple (Maclura pomifera) and its two major prenylated isoflavones, osajin (OSA) and pomiferin (POM), were evaluated in vitro for their ability to affect four mediators of inflammation and to inhibit tau protein fibrillization. The two isoflavones were effective in enhancing the activity of NSAID activated gene (NAG-1) at 2.5 μg/mL (1.5 – 1.8 fold increase) and inhibiting iNOS and NF-κB activity with IC50 values in the range of 6 – 13 μg/mL. Pomiferin also inhibited intracellular oxidative stress with IC50 of 3.3 μg/mL, while osajin did not show any effect. The extract activated NAG-1 and inhibited iNOS and oxidative stress without affecting NF-κB. As observed by transmission electron microscopy (TEM), MPE, OSA and POM also inhibited arachidonic acid-induced tau fibrillization in a concentration-dependent manner.
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Affiliation(s)
- Ehab A. Abourashed
- Department of Pharmaceutical Sciences, College of Pharmacy, Chicago State University, Chicago, IL 60628, USA
| | - Aida Abraha
- Department of Chemistry & Physics, College of Arts and Sciences; Chicago State University, Chicago, IL 60628, USA
| | - Shabana I. Khan
- National Center for Natural Products Research, and Division of Pharmacognosy, School of Pharmacy, University of Mississippi, MS 38677, USA
- Department of Biomolecular Sciences, Division of Pharmacognosy, School of Pharmacy, University of Mississippi, MS 38677, USA
| | - Tanika McCants
- Department of Chemistry & Physics, College of Arts and Sciences; Chicago State University, Chicago, IL 60628, USA
| | - Saad Awan
- Department of Pharmaceutical Sciences, College of Pharmacy, Chicago State University, Chicago, IL 60628, USA
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185
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Friedland R. perspectives on the clean India campaign, the microbiota and ayurveda. Ann Neurosci 2015; 22:130-1. [PMID: 26130920 PMCID: PMC4481549 DOI: 10.5214/ans.0972.7531.220302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Affiliation(s)
- Robert Friedland
- Rudd Chair, Department of Neurology, University of Louisville, USA
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186
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Yang Y, Cheng X, Liu W, Chou G, Wang Z, Wang C. Potent AChE and BChE inhibitors isolated from seeds of Peganum harmala Linn by a bioassay-guided fractionation. JOURNAL OF ETHNOPHARMACOLOGY 2015; 168:279-86. [PMID: 25862961 DOI: 10.1016/j.jep.2015.03.070] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Revised: 03/10/2015] [Accepted: 03/13/2015] [Indexed: 05/24/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Seeds of Peganum harmala Linn are traditionally used as folk medical herb in Uighur medicine in China to treat disorders of hemiplegia and amnesia. Previously studies have proved that dominating alkaloids in P. harmala show significant inhibitory activities on the cholinesterase. AIM OF THE STUDY The aim of the present study is to isolate trace ingredients from seeds of P. harmala and evaluate its inhibitory activities on acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). MATERIALS AND METHODS For sake of screening effective cholinesterase inhibitors, trace compounds were isolated from seeds of P. harmala through a bioassay-guided fractionation and their structures were determined via detailed spectral analysis. The inhibitory activities on AChE and BChE were assessed using an improved Ellman method by UPLC-ESI-MS/MS to determine the common final product choline. RESULTS The activity-guided fractionation led to the isolation of two new alkaloids 2-aldehyde-tetrahydroharmine (10), 2-carboxyl-3,4-dihydroquinazoline (19), one syringin structure analog 1-O-β-D-xylopyranose sinapyl alcohol (22), and along with 19 known compounds. Compounds acetylnorharmine (6), harmic acid methy ester (7), harmine N-oxide (13), 6-methoxyindoline (14), syringin (21) were first found from genus Peganum and compounds 3-hydroxylated harmine (4), 1-hydroxy-7-methoxy-β-carboline (5) were new natural products. The results showed that the 2-aldehyde-tetrahydroharmine (10) has a potential inbibitive effect on both AChE and BChE with IC50 values of 12.35 ± 0.24 and 5.51 ± 0.33 µM, respectively. Deoxyvasicine (15) and vasicine (16) showed the strongest BChE inhibitory activity with IC50 values of 0.04 ± 0.01 and 0.1 ± 0.01 µM. The analysis of the structure-activity relationship indicated that the saturation of pyridine ring and the presence of substitution at indole ring, C-1, C-3, C-7 and N-2, for β-carbolines, were essential for effective inhibition of both AChE and BChE and the five-membered ring between C-2 and N-3 as well as the substituent groups sited at C-4 and C-9, for quinazolines, were important to both the AChE/BChE-inhibitory activity. CONCLUSIONS Bioassay-guided fractionation has led to the isolation of AChE and BChE inhibitors from the seeds of P. harmala. These results are in agreement with the traditional uses of the seeds of P. harmala.
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Affiliation(s)
- Yadi Yang
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Rood, Shanghai 201203, China; The MOE Key Laboratory for Standardization of Chinese Medicines, 1200 Cailun Rood, Shanghai 201203, China; The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, 1200 Cailun Rood, Shanghai 201203, China
| | - Xuemei Cheng
- Shanghai R&D Centre for Standardization of Chinese Medicines, 199 Guoshoujing Road, Shanghai 201203, China.
| | - Wei Liu
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Rood, Shanghai 201203, China; The MOE Key Laboratory for Standardization of Chinese Medicines, 1200 Cailun Rood, Shanghai 201203, China; The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, 1200 Cailun Rood, Shanghai 201203, China
| | - Guixin Chou
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Rood, Shanghai 201203, China; The MOE Key Laboratory for Standardization of Chinese Medicines, 1200 Cailun Rood, Shanghai 201203, China; The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, 1200 Cailun Rood, Shanghai 201203, China; Shanghai R&D Centre for Standardization of Chinese Medicines, 199 Guoshoujing Road, Shanghai 201203, China
| | - Zhengtao Wang
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Rood, Shanghai 201203, China; The MOE Key Laboratory for Standardization of Chinese Medicines, 1200 Cailun Rood, Shanghai 201203, China; The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, 1200 Cailun Rood, Shanghai 201203, China; Shanghai R&D Centre for Standardization of Chinese Medicines, 199 Guoshoujing Road, Shanghai 201203, China
| | - Changhong Wang
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Rood, Shanghai 201203, China; The MOE Key Laboratory for Standardization of Chinese Medicines, 1200 Cailun Rood, Shanghai 201203, China; The SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicine, 1200 Cailun Rood, Shanghai 201203, China; Shanghai R&D Centre for Standardization of Chinese Medicines, 199 Guoshoujing Road, Shanghai 201203, China.
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187
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Sylla T, Pouységu L, Da Costa G, Deffieux D, Monti JP, Quideau S. Gallotannins and Tannic Acid: First Chemical Syntheses and In Vitro Inhibitory Activity on Alzheimer’s Amyloid β-Peptide Aggregation. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411606] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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188
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Sylla T, Pouységu L, Da Costa G, Deffieux D, Monti JP, Quideau S. Gallotannins and Tannic Acid: First Chemical Syntheses and In Vitro Inhibitory Activity on Alzheimer's Amyloid β-Peptide Aggregation. Angew Chem Int Ed Engl 2015; 54:8217-21. [PMID: 26013280 DOI: 10.1002/anie.201411606] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 04/10/2015] [Indexed: 01/08/2023]
Abstract
The screening of natural products in the search for new lead compounds against Alzheimer's disease has unveiled several plant polyphenols that are capable of inhibiting the formation of toxic β-amyloid fibrils. Gallic acid based gallotannins are among these polyphenols, but their antifibrillogenic activity has thus far been examined using "tannic acid", a commercial mixture of gallotannins and other galloylated glucopyranoses. The first total syntheses of two true gallotannins, a hexagalloylglucopyranose and a decagalloylated compound whose structure is commonly used to depict "tannic acid", are now described. These depsidic gallotannins and simpler galloylated glucose derivatives all inhibit amyloid β-peptide (Aβ) aggregation in vitro, and monogalloylated α-glucogallin and a natural β-hexagalloylglucose are shown to be the strongest inhibitors.
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Affiliation(s)
- Tahiri Sylla
- Univ. Bordeaux, ISM (CNRS-UMR 5255) and IECB, 2 rue Robert Escarpit, 33607 Pessac Cedex (France).,Current address: Univ. Jean Lorougnon Guédé, Daloa (Ivory Coast)
| | - Laurent Pouységu
- Univ. Bordeaux, ISM (CNRS-UMR 5255) and IECB, 2 rue Robert Escarpit, 33607 Pessac Cedex (France).
| | - Grégory Da Costa
- Univ. Bordeaux, GESVAB (EA 3675), ISVV Bordeaux-Aquitaine, 33883 Villenave d'Ornon Cedex (France)
| | - Denis Deffieux
- Univ. Bordeaux, ISM (CNRS-UMR 5255) and IECB, 2 rue Robert Escarpit, 33607 Pessac Cedex (France)
| | - Jean-Pierre Monti
- Univ. Bordeaux, GESVAB (EA 3675), ISVV Bordeaux-Aquitaine, 33883 Villenave d'Ornon Cedex (France).
| | - Stéphane Quideau
- Univ. Bordeaux, ISM (CNRS-UMR 5255) and IECB, 2 rue Robert Escarpit, 33607 Pessac Cedex (France).
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189
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Dai X, Hou W, Sun Y, Gao Z, Zhu S, Jiang Z. Chitosan Oligosaccharides Inhibit/Disaggregate Fibrils and Attenuate Amyloid β-Mediated Neurotoxicity. Int J Mol Sci 2015; 16:10526-36. [PMID: 26006224 PMCID: PMC4463660 DOI: 10.3390/ijms160510526] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 04/19/2015] [Accepted: 05/03/2015] [Indexed: 12/28/2022] Open
Abstract
Alzheimer’s disease (AD) is characterized by a large number of amyloid-β (Aβ) deposits in the brain. Therefore, inhibiting Aβ aggregation or destabilizing preformed aggregates could be a promising therapeutic target for halting/slowing the progression of AD. Chitosan oligosaccharides (COS) have previously been reported to exhibit antioxidant and neuroprotective effects. Recent study shows that COS could markedly decrease oligomeric Aβ-induced neurotoxicity and oxidative stress in rat hippocampal neurons. However, the potential mechanism that COS reduce Aβ-mediated neurotoxicity remains unclear. In the present study, our findings from circular dichroism spectroscopy, transmission electron microscope and thioflavin T fluorescence assay suggested that COS act as an inhibitor of Aβ aggregation and this effect shows dose-dependency. Moreover, data from thioflavin T assay indicated that COS could significantly inhibit fibrils formation and disrupt preformed fibrils in a dose-dependent manner. Furthermore, the addition of COS attenuated Aβ1-42-induced neurotoxicity in rat cortical neurons. Taken together, our results demonstrated for the first time that COS could inhibit Aβ1-42 fibrils formation and disaggregate preformed fibrils, suggesting that COS may have anti-Aβ fibrillogenesis and fibril-destabilizing properties. These findings highlight the potential role of COS as novel therapeutic agents for the prevention and treatment of AD.
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Affiliation(s)
- Xueling Dai
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100191, China.
| | - Wanqi Hou
- College of Life Sciences, Capital Normal University, Beijing 100048, China.
| | - Yaxuan Sun
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100191, China.
| | - Zhaolan Gao
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100191, China.
| | - Shigong Zhu
- Department of Physiology and Pathophysiology, Peking University School of Basic Medical Sciences, Beijing 100191, China.
| | - Zhaofeng Jiang
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100191, China.
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190
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Murakami K. Conformation-specific antibodies to target amyloid β oligomers and their application to immunotherapy for Alzheimer's disease. Biosci Biotechnol Biochem 2015; 78:1293-305. [PMID: 25130729 DOI: 10.1080/09168451.2014.940275] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Amyloid β-protein (Aβ) oligomers, intermediates of Aβ aggregation, cause cognitive impairment and synaptotoxicity in the pathogenesis of Alzheimer's disease (AD). Immunotherapy using anti-Aβ antibody is one of the most promising approaches for AD treatment. However, most clinical trials using conventional sequence-specific antibodies have proceeded with difficulty. This is probably due to the unintended removal of the non-pathological monomer and fibrils of Aβ as well as the pathological oligomers by these antibodies that recognize Aβ sequence, which is not involved in synaptotoxicity. Several efforts have been made recently to develop conformation-specific antibodies that target the tertiary structure of Aβ oligomers. Here, we review the recent findings of Aβ oligomers and anti-Aβ antibodies including our own, and discuss their potential as therapeutic and diagnostic tools.
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Affiliation(s)
- Kazuma Murakami
- a Division of Food Science and Biotechnology , Graduate School of Agriculture, Kyoto University , Kyoto , Japan
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191
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Porzoor A, Alford B, Hügel HM, Grando D, Caine J, Macreadie I. Anti-amyloidogenic properties of some phenolic compounds. Biomolecules 2015; 5:505-27. [PMID: 25898401 PMCID: PMC4496683 DOI: 10.3390/biom5020505] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 04/02/2015] [Accepted: 04/03/2015] [Indexed: 12/23/2022] Open
Abstract
A family of 21 polyphenolic compounds consisting of those found naturally in danshen and their analogues were synthesized and subsequently screened for their anti-amyloidogenic activity against the amyloid beta peptide (Aβ42) of Alzheimer’s disease. After 24 h incubation with Aβ42, five compounds reduced thioflavin T (ThT) fluorescence, indicative of their anti-amyloidogenic propensity (p < 0.001). TEM and immunoblotting analysis also showed that selected compounds were capable of hindering fibril formation even after prolonged incubations. These compounds were also capable of rescuing the yeast cells from toxic changes induced by the chemically synthesized Aβ42. In a second assay, a Saccharomyces cerevisiae AHP1 deletant strain transformed with GFP fused to Aβ42 was treated with these compounds and analyzed by flow cytometry. There was a significant reduction in the green fluorescence intensity associated with 14 compounds. We interpret this result to mean that the compounds had an anti-amyloid-aggregation propensity in the yeast and GFP-Aβ42 was removed by proteolysis. The position and not the number of hydroxyl groups on the aromatic ring was found to be the most important determinant for the anti-amyloidogenic properties.
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Affiliation(s)
- Afsaneh Porzoor
- School of Applied Sciences, RMIT University, Bundoora, Victoria 3083, Australia.
| | - Benjamin Alford
- School of Applied Sciences, RMIT University, Melbourne, Victoria 3000, Australia.
| | - Helmut M Hügel
- School of Applied Sciences, RMIT University, Melbourne, Victoria 3000, Australia.
| | - Danilla Grando
- School of Applied Sciences, RMIT University, Bundoora, Victoria 3083, Australia.
| | - Joanne Caine
- Materials Science and Engineering, CSIRO Preventative Health Flagship, 343 Royal Parade, Parkville, Victoria 3052, Australia.
| | - Ian Macreadie
- School of Applied Sciences, RMIT University, Bundoora, Victoria 3083, Australia.
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192
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Hage S, Stanga S, Marinangeli C, Octave JN, Dewachter I, Quetin-Leclercq J, Kienlen-Campard P. Characterization of Pterocarpus erinaceus kino extract and its gamma-secretase inhibitory properties. JOURNAL OF ETHNOPHARMACOLOGY 2015; 163:192-202. [PMID: 25639816 DOI: 10.1016/j.jep.2015.01.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 01/14/2015] [Accepted: 01/21/2015] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The aqueous decoction of Pterocarpus erinaceus has been traditionally used in Benin against memory troubles. AIM OF THE STUDY New strategies are needed against Alzheimer׳s disease (AD), for, to date, AD treatment is symptomatic and consists in drugs treating the cognitive decline. An interesting target is the β-amyloid peptide (Aβ), whose accumulation and progressive deposition into amyloid plaques are key events in AD aetiology. Identifying new and more selective γ-secretase inhibitors or modulators (none of the existing has proven so far to be selective or fully efficient) appears in this respect of particular interest. We studied the activity and mechanisms of action of Pterocarpus erinaceus kino aqueous extract, after the removal of catechic tannins (KAST). METHODS AND RESULTS We tested KAST at non-toxic concentrations on cells expressing the human Amyloid Precursor Protein (APP695), as well as on primary neurons. Pterocarpus erinaceus extract was found to inhibit Aβ release in both models. We further showed that KAST inhibited γ-secretase activity in cell-free and in vitro assays, strongly suggesting that KAST is a natural γ-secretase inhibitor. Importantly, this extract did not inhibit the cleavage of Notch, another γ-secretase substrate responsible for major detrimental side effects observed with γ-secretase inhibitors. Epicatechin was further identified in KAST by HPLC-MS. CONCLUSION Pterocarpus erinaceus kino extract appears therefore as a new γ-secretase inhibitor selective towards APP processing.
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Affiliation(s)
- Salim Hage
- Université catholique de Louvain, B-1200 Brussels, Belgium; Louvain Drug Research Institute (LDRI), Université catholique de Louvain, Belgium
| | - Serena Stanga
- Université catholique de Louvain, B-1200 Brussels, Belgium; Institute of Neuroscience (IoNS), Université catholique de Louvain, Belgium
| | - Claudia Marinangeli
- Université catholique de Louvain, B-1200 Brussels, Belgium; Institute of Neuroscience (IoNS), Université catholique de Louvain, Belgium
| | - Jean-Noël Octave
- Université catholique de Louvain, B-1200 Brussels, Belgium; Institute of Neuroscience (IoNS), Université catholique de Louvain, Belgium
| | - Ilse Dewachter
- Université catholique de Louvain, B-1200 Brussels, Belgium; Institute of Neuroscience (IoNS), Université catholique de Louvain, Belgium
| | - Joëlle Quetin-Leclercq
- Université catholique de Louvain, B-1200 Brussels, Belgium; Louvain Drug Research Institute (LDRI), Université catholique de Louvain, Belgium
| | - Pascal Kienlen-Campard
- Université catholique de Louvain, B-1200 Brussels, Belgium; Institute of Neuroscience (IoNS), Université catholique de Louvain, Belgium.
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193
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The resveratrol trimer miyabenol C inhibits β-secretase activity and β-amyloid generation. PLoS One 2015; 10:e0115973. [PMID: 25629409 PMCID: PMC4309453 DOI: 10.1371/journal.pone.0115973] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 11/28/2014] [Indexed: 11/24/2022] Open
Abstract
Accumulation and deposition of amyloid-β peptide (Aβ) in the brain is a primary cause of the pathogenesis of Alzheimer’s disease (AD). Aβ is generated from amyloid-β precursor protein (APP) through sequential cleavages first by β-secretase and then by γ-secretase. Inhibiting β-secretase activity is believed to be one of the most promising strategies for AD treatment. In the present study, we found that a resveratrol trimer, miyabenol C, isolated from stems and leaves of the small-leaf grape (Vitisthunbergii var. taiwaniana), can markedly reduce Aβ and sAPPβ levels in both cell cultures and the brain of AD model mice. Mechanistic studies revealed that miyabenol C affects neither protein levels of APP, the two major α-secretases ADAM10 and TACE, and the γ-secretase component Presenilin 1, nor γ-secretase-mediated Notch processing and TACE activity. In contrast, although miyabenol C has no effect on altering protein levels of the β-secretase BACE1, it can inhibit both in vitro and in vivo β-secretase activity. Together, our results indicate that miyabenol C is a prominent β-secretase inhibitor and lead compound for AD drug development.
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194
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Du WJ, Guo JJ, Gao MT, Hu SQ, Dong XY, Han YF, Liu FF, Jiang S, Sun Y. Brazilin inhibits amyloid β-protein fibrillogenesis, remodels amyloid fibrils and reduces amyloid cytotoxicity. Sci Rep 2015; 5:7992. [PMID: 25613018 PMCID: PMC4303869 DOI: 10.1038/srep07992] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 12/29/2014] [Indexed: 12/22/2022] Open
Abstract
Soluble amyloid β-protein (Aβ) oligomers, the main neurotoxic species, are predominantly formed from monomers through a fibril-catalyzed secondary nucleation. Herein, we virtually screened an in-house library of natural compounds and discovered brazilin as a dual functional compound in both Aβ42 fibrillogenesis inhibition and mature fibril remodeling, leading to significant reduction in Aβ42 cytotoxicity. The potent inhibitory effect of brazilin was proven by an IC50 of 1.5 ± 0.3 μM, which was smaller than that of (−)-epigallocatechin gallate in Phase III clinical trials and about one order of magnitude smaller than those of curcumin and resveratrol. Most importantly, it was found that brazilin redirected Aβ42 monomers and its mature fibrils into unstructured Aβ aggregates with some β-sheet structures, which could prevent both the primary nucleation and the fibril-catalyzed secondary nucleation. Molecular simulations demonstrated that brazilin inhibited Aβ42 fibrillogenesis by directly binding to Aβ42 species via hydrophobic interactions and hydrogen bonding and remodeled mature fibrils by disrupting the intermolecular salt bridge Asp23-Lys28 via hydrogen bonding. Both experimental and computational studies revealed a different working mechanism of brazilin from that of known inhibitors. These findings indicate that brazilin is of great potential as a neuroprotective and therapeutic agent for Alzheimer's disease.
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Affiliation(s)
- Wen-Jie Du
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Jing-Jing Guo
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Ming-Tao Gao
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Sheng-Quan Hu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong SAR, China
| | - Xiao-Yan Dong
- 1] Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2] Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Yi-Fan Han
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong SAR, China
| | - Fu-Feng Liu
- 1] Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2] Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Shaoyi Jiang
- Department of Chemical Engineering, University of Washington, Seattle, WA 98195-1750, USA
| | - Yan Sun
- 1] Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2] Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
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195
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Custódio L, Patarra J, Alberício F, Neng NR, Nogueira JMF, Romano A. In vitroantioxidant and inhibitory activity of water decoctions of carob tree (Ceratonia siliquaL.) on cholinesterases, α-amylase and α-glucosidase. Nat Prod Res 2015; 29:2155-9. [DOI: 10.1080/14786419.2014.996147] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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196
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Özkan OE, Zengin G, Akça M, Baloğlu MC, Olgun Ç, Altuner EM, Ateş S, Aktümsek A, Vurdu H. DNA protection, antioxidant, antibacterial and enzyme inhibition activities of heartwood and sapwood extracts from juniper and olive woods. RSC Adv 2015. [DOI: 10.1039/c5ra12302j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, DNA protective, antioxidant, antibacterial and enzyme inhibiting properties of methanol extracts obtained from juniper and olive heartwood and sapwood were determined.
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Affiliation(s)
- Osman Emre Özkan
- Department of Forest Industrial Engineering
- Faculty of Forestry
- Kastamonu University
- Kastamonu
- Turkey
| | - Gökhan Zengin
- Department of Biology
- Science Faculty
- Selcuk University
- Konya
- Turkey
| | - Mehmet Akça
- Department of Forest Industrial Engineering
- Faculty of Forestry
- Kastamonu University
- Kastamonu
- Turkey
| | - Mehmet Cengiz Baloğlu
- Department of Genetics and Bioengineering
- Faculty of Engineering and Architecture
- Kastamonu University
- Kastamonu
- Turkey
| | - Çağrı Olgun
- Department of Forest Industrial Engineering
- Faculty of Forestry
- Kastamonu University
- Kastamonu
- Turkey
| | | | - Saim Ateş
- Department of Forest Industrial Engineering
- Faculty of Forestry
- Kastamonu University
- Kastamonu
- Turkey
| | | | - Hasan Vurdu
- Department of Forest Industrial Engineering
- Faculty of Forestry
- Kastamonu University
- Kastamonu
- Turkey
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197
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Fu Z, Li Z, Xue R, Jiang J, Huang C. Stereoisomerism metabolites found in rats after oral administration of timosaponin B-II using HPLC-Q-TOF-MS and NMR methods. RSC Adv 2015. [DOI: 10.1039/c5ra09133k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Stereoisomerism metabolites found in rats after oral administration of timosaponin B-II.
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Affiliation(s)
- Zhiwen Fu
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P.R. China
- Shuguang Hospital affiliated to Shanghai University of Traditional Chinese Medicine
| | - Zhixiong Li
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P.R. China
| | - Rui Xue
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P.R. China
| | - Jian Jiang
- Shuguang Hospital affiliated to Shanghai University of Traditional Chinese Medicine
- Shanghai 201203
- P.R. China
| | - Chenggang Huang
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- P.R. China
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198
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Bharate JB, Vishwakarma RA, Bharate SB. Metal-free domino one-pot protocols for quinoline synthesis. RSC Adv 2015. [DOI: 10.1039/c5ra07798b] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Metal-free domino one-pot protocols for quinoline synthesis have been reviewed.
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Affiliation(s)
- Jaideep B. Bharate
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001
- India
- Academy of Scientific & Innovative Research (AcSIR)
| | - Ram A. Vishwakarma
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001
- India
- Academy of Scientific & Innovative Research (AcSIR)
| | - Sandip B. Bharate
- Medicinal Chemistry Division
- CSIR-Indian Institute of Integrative Medicine
- Jammu-180001
- India
- Academy of Scientific & Innovative Research (AcSIR)
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199
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Pacifico S, Piccolella S, Marciano S, Galasso S, Nocera P, Piscopo V, Fiorentino A, Monaco P. LC-MS/MS profiling of a mastic leaf phenol enriched extract and its effects on H2O2 and Aβ(25-35) oxidative injury in SK-B-NE(C)-2 cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:11957-11966. [PMID: 25405583 DOI: 10.1021/jf504544x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The development of polyphenol neuroprotective nutraceuticals useful for functional foods could be a valuable strategy for counteracting oxidative stress relative diseases as Alzheimer's Disease (AD). Oxidative stress is one of the AD earliest event and seems to play a central role in Aβ generation, neuroinflammation, and neuronal apoptosis. In order to counteract AD neurodegeneration, the inhibition of the vicious cycle of Aβ generation and oxidation is an attractive therapeutic strategy, and antiamyloidogenic and antioxidant plant drugs could represent an alternative and valid approach. In this context, an alcoholic extract (Pl-M) from deterpenated Pistacia lentiscus L. leaves was investigated for its phenol composition through LC-ESI-MS/MS analysis. Besides the identified metabolites, ten compounds were reported for the first time as constituents of Pistacia lentiscus leaves. Through DPPH, ABTS, and ORAC methods, the antioxidant potential of the extract was initially investigated. In order to evaluate the preparation of a safe and no toxic extract, MTT, SRB, and LDH assays toward SH-5YSY, and SK-N-BE(2)-C human neuronal cell lines, as well as on C6 mouse glial cell line, were performed. Evaluating the protective effects from oxidant injury in SK-N-BE(2)-C cells cotreated with the plant complex and H2O2, or Aβ(25-35) fragment, it was observed that Pl-M extract exerted a significant cytoprotective response in both the oxidized cell systems. In particular, Pl-M extract was able to reduce by nearly 50% the Aβ(25-35) induced toxicity at 25.0 μg/mL dose level, whereas it counteracted almost completely the cytotoxic action at 100.0 μg/mL. Data obtained allow us to hypothesize the use of Pistacia lentiscus leaves, a broadly available and renewable source, as an alternative strategy for the enrichment of food matrices with polyphenol bioactives. The present study put the basis for bioavailability and preclinical studies, able to define Pl-M extract safety and efficacy.
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Affiliation(s)
- Severina Pacifico
- Department of Environmental Biological and Pharmaceutical Sciences and Technologies, Second University of Naples , Via Vivaldi 43, I-81100 Caserta, Italy
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200
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Kurapati KRV, Samikkannu T, Atluri VSR, Kaftanovskaya E, Yndart A, Nair MPN. β-Amyloid1-42, HIV-1Ba-L (clade B) infection and drugs of abuse induced degeneration in human neuronal cells and protective effects of ashwagandha (Withania somnifera) and its constituent Withanolide A. PLoS One 2014; 9:e112818. [PMID: 25415340 PMCID: PMC4240587 DOI: 10.1371/journal.pone.0112818] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 10/15/2014] [Indexed: 11/25/2022] Open
Abstract
Alzheimer's disease (AD) is characterized by progressive dysfunction of memory and higher cognitive functions with abnormal accumulation of extracellular amyloid plaques and intracellular neurofibrillary tangles throughout cortical and limbic brain regions. Withania somnifera (WS) also known as ‘ashwagandha’ (ASH) is used widely in Ayurvedic medicine as a nerve tonic and memory enhancer. However, there is paucity of data on potential neuroprotective effects of ASH against β-Amyloid (1–42) (Aβ) induced neuropathogenesis. In the present study, we have tested the neuroprotective effects of Methanol: Chloroform (3:1) extract of ASH and its constituent Withanolide A (WA) against Aβ induced toxicity, HIV-1Ba-L (clade B) infection and the effects of drugs of abuse using a human neuronal SK-N-MC cell line. Aβ when tested individually, induced cytotoxic effects in SK-N-MC cells as shown by increased trypan blue stained cells. However, when ASH was added to Aβ treated cells the toxic effects were neutralized. This observation was supported by cellular localization of Aβ, MTT formazan exocytosis, and the levels of acetylcholinesterase activity, confirming the chemopreventive or protective effects of ASH against Aβ induced toxicity. Further, the levels of MAP2 were significantly increased in cells infected with HIV-1Ba-L (clade B) as well as in cells treated with Cocaine (COC) and Methamphetamine (METH) compared with control cells. In ASH treated cells the MAP2 levels were significantly less compared to controls. Similar results were observed in combination experiments. Also, WA, a purified constituent of ASH, showed same pattern using MTT assay as a parameter. These results suggests that neuroprotective properties of ASH observed in the present study may provide some explanation for the ethnopharmacological uses of ASH in traditional medicine for cognitive and other HIV associated neurodegenerative disorders and further ASH could be a potential novel drug to reduce the brain amyloid burden and/or improve the HIV-1 associated neurocognitive impairments
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Affiliation(s)
- Kesava Rao Venkata Kurapati
- Department of Immunology, Institute of NeuroImmune Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Modesto A. Maidique Campus, Miami, Florida, 33199, United States of America
| | - Thangavel Samikkannu
- Department of Immunology, Institute of NeuroImmune Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Modesto A. Maidique Campus, Miami, Florida, 33199, United States of America
| | - Venkata Subba Rao Atluri
- Department of Immunology, Institute of NeuroImmune Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Modesto A. Maidique Campus, Miami, Florida, 33199, United States of America
| | - Elena Kaftanovskaya
- Human and Molecular Genetics, Herbert Wertheim College of Medicine, Florida International University, Modesto A. Maidique Campus, Miami, Florida, 33199, United States of America
| | - Adriana Yndart
- Department of Immunology, Institute of NeuroImmune Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Modesto A. Maidique Campus, Miami, Florida, 33199, United States of America
| | - Madhavan P. N. Nair
- Department of Immunology, Institute of NeuroImmune Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Modesto A. Maidique Campus, Miami, Florida, 33199, United States of America
- * E-mail:
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