Abstract:
UNLABELLED:Context: Garcinia hombroniana Pierre, known as manggis hutan in Malaysia is a rich source of xanthones and benzophenones. OBJECTIVES:This study was aimed to isolate and characterize potential cholinesterase inhibitors from the extracts of G. hombroniana bark and investigate their interactions with the enzymes. MATERIALS AND METHODS:The dichloromethane extract afforded five triterpenoids which were characterized by NMR and mass spectral techniques. Cholinesterase inhibitory assay and molecular docking were performed to get insight of the inhibitory activity and molecular interactions of the compounds. The compounds were also tested for their antioxidant capacity. RESULTS:The isolated triterpenoids were identified as: 2β-hydroxy-3α-O-caffeoyltaraxar-14-en-28-oic acid (1), taraxerol (2), taraxerone (3), betulin (4) and betulinic acid (5). Compound 1 was the most active dual inhibitor of both AChE and BChE. Compound 1 also showed good antioxidant activities. CONCLUSION:Compound 1 had dual and moderate inhibitory activity on AChE and BChE worthy for further investigations.
journal_name
J Enzyme Inhib Med Chemjournal_title
Journal of enzyme inhibition and medicinal chemistryauthors
Jamila N,Khairuddean M,Yeong KK,Osman H,Murugaiyah Vdoi
10.3109/14756366.2014.895720subject
Has Abstractpub_date
2015-02-01 00:00:00pages
133-9issue
1eissn
1475-6366issn
1475-6374journal_volume
30pub_type
杂志文章abstract:CONTEXT:Tumor acidity represents a major cause of chemoresistance. Proton pump inhibitors (PPIs) can neutralize tumor acidity, sensitizing cancer cells to chemotherapy. OBJECTIVE:To compare the anti-tumor efficacy of different PPIs in vitro and in vivo. MATERIALS AND METHODS:In vitro experiments PPIs anti-tumor effic...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2015.1046062
更新日期:2016-08-01 00:00:00
abstract::Exposure of the N-methoxycarbonyl-bicyclic-keto-acid 5 (improved preparation) to the Barnick beta-keto-acid synthesis yielded an aqueous solution of the sodium salts of the beta-keto-acids 26 and 27 which on heating at 60-65 degrees C furnished the N-methoxycarbonyl-tricyclic-ketone 9 (55%) plus the hydroxy-ketone 28 ...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360290032958
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abstract::Enzyme inhibition by fullerene derivatives has attracted much attention. In this communication, effects of two water-solube fullerene derivatives, fullerol and trimalonic acid C60 (TMA C60) on polymerase chain reaction (PCR) were investigated by using PCR of beta-actin cDNA derived from HeLa cells as an experimental m...
journal_title:Journal of enzyme inhibition and medicinal chemistry
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doi:10.1080/14756360601114270
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journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360701652476
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abstract::Carbonic anhydrases (CAs, EC 4.2.1.1) are ubiquitous enzymes that catalyze the hydration of CO(2) to bicarbonate and protons. Inhibition of CAs has been clinically exploited for the treatment of various classes of diseases for decades, but investigating new classes of inhibitors continues to be important. We have synt...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2011.639016
更新日期:2013-04-01 00:00:00
abstract::Protein disulphide isomerase (PDI) in the endoplasmic reticulum catalyzes the rearrangement of disulphide bridges during folding of secreted proteins. It binds various molecules that inhibit its activity. But here, we looked for molecules that would potentiate its activity. PDI reductase activity was measured in vitro...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2010.546794
更新日期:2011-10-01 00:00:00
abstract::This research investigates the synthesis and inhibitory potency of a series of novel dipeptidyl allyl sulfones as clan CA cysteine protease inhibitors. The structure of the inhibitors consists of a R(1)-Phe-R(2)-AS-Ph scaffold (AS = allyl sulfone). R(1) was varied with benzyloxycarbonyl, morpholinocarbonyl, or N-methy...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2011.651466
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abstract::The purpose of this study was the evaluation of the xanthine oxidase (XO) inhibition produced by some synthetic 2-styrylchromones. Ten polyhydroxylated derivatives with several substitution patterns were synthesised, and these and a positive control, allopurinol, were tested for their effects on XO activity by measuri...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360290019944
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abstract::A novel series of 5-(5-nitrofuran-2-yl)-and 5-(5-nitrothiophen-2-yl)-1,3,4-thiadiazole-2-amines bearing acyclic amine at C-2 position of thiadiazole ring were synthesized and evaluated in vitro against promastigote and amastigote forms of Leishmania major. The structure-activity of series was investigated by studying ...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2012.689297
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abstract::An efficient and simple microwave assisted synthesis of sulfonamide derivatives incorporating the pyridazine moiety has been developed. These sulfonamides were used for the preparation of new heterocyclic compounds via reaction with different reagents using a microwave irradiation technique. The structures of the newl...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2012.737787
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abstract::The inhibition of monoamine oxidase B (MAO-B) could be an effective approach for the treatment of various neurological disorders. In this study, a series of 1, 4-benzodioxan-substituted chalcone derivatives were designed, synthesised and evaluated for their inhibitory activity against human MAO-B (hMAO-B). The majorit...
journal_title:Journal of enzyme inhibition and medicinal chemistry
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abstract::EGFR tyrosine kinase has been reported mainly in 40-80% of non-small lung cancers, in addition to colon and breast cancers. In this study, we illustrate the synthesis of a highly potent antitumor agent. The synthesized compound 4 was screened at NCI, USA, for antitumor activity against non-small lung cancer, colon can...
journal_title:Journal of enzyme inhibition and medicinal chemistry
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abstract::Three series of 5-bromo-thieno[2,3-b]pyridines bearing amide or benzoyl groups at position 2 were prepared as pim-1 inhibitors. All the prepared compounds were tested for their pim-1 enzyme inhibitory activity. Two compounds (3c and 5b) showed moderate pim-1 inhibitory activity with IC50 of 35.7 and 12.71 μM, respecti...
journal_title:Journal of enzyme inhibition and medicinal chemistry
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abstract::Leishmaniasis is considered as one of the major neglected tropical diseases due to its magnitude and wide geographic distribution. Leishmania braziliensis, responsible for cutaneous leishmaniasis, is the most prevalent species in Brazil. Superoxide dismutase (SOD) belongs to the antioxidant pathway of the parasites an...
journal_title:Journal of enzyme inhibition and medicinal chemistry
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journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360412331295026
更新日期:2005-02-01 00:00:00
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journal_title:Journal of enzyme inhibition and medicinal chemistry
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abstract::Carbonic anhydrases (CAs) are ubiquitous metallo-enzymes that catalyse the reversible hydration of carbon dioxide to bicarbonate and proton. In humans there are 15 isoforms among which only 12 are catalytically active. Since active human (h) CAs show different efficiency, the understanding of the molecular determinant...
journal_title:Journal of enzyme inhibition and medicinal chemistry
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journal_title:Journal of enzyme inhibition and medicinal chemistry
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journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2011.645241
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abstract::The α-glucosidase inhibitory activities of bergenin derivatives were evaluated. Bergenin derivatives were synthesized from bergenin which is a characteristic compound of B. ligulata. A new bergenin derivative, 11-O-(3',4'-dimethoxybenzoyl)-bergenin showed the highest potent inhibitory activity among those of bergenin ...
journal_title:Journal of enzyme inhibition and medicinal chemistry
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abstract:CONTEXT:Hypotension causes histologic changes in the hippocampal CA1 area, while behavior remains unchanged. We believe that an even stronger insult may also cause behavioral changes. OBJECTIVE:We used a rat hemorrhagic shock model plus temporary hypoxia to assess functional outcome at different time points post-injur...
journal_title:Journal of enzyme inhibition and medicinal chemistry
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doi:10.3109/14756366.2013.866658
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journal_title:Journal of enzyme inhibition and medicinal chemistry
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journal_title:Journal of enzyme inhibition and medicinal chemistry
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journal_title:Journal of enzyme inhibition and medicinal chemistry
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abstract::Di(2-ethylhexyl) phthalate (DEHP) is the most widely plasticizer for polyvinyl chloride (PVC) that is used in plastic tubes, in medical and paramedical devices as well as in food storage packaging. The toxicological profile of DEHP has been evaluated in a number of experimental animal models and has been extensively d...
journal_title:Journal of enzyme inhibition and medicinal chemistry
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abstract::New ureido benzenesulfonamides incorporating a GABA moiety as a linker between the ureido and the sulfonamide functionalities were synthesized and their inhibition potency determined against both the predominant cytosolic (hCA I and II) and the transmembrane tumor-associated (hCA IX and XII) isoforms of the metalloenz...
journal_title:Journal of enzyme inhibition and medicinal chemistry
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abstract::Novel 6-substituted thiazolocarbazole derivatives have been synthesized under microwave irradiation via the corresponding imino-1,2,3-dithiazoles. In vitro antitumor potential of these polyheterocyclic compounds was evaluated. Among all the tested thiazolocarbazoles, compound 10 is the most effective in inhibiting cel...
journal_title:Journal of enzyme inhibition and medicinal chemistry
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