Abstract:
:The CHCl(3)-soluble fraction of the whole plant of Duranta repens showed anti-plasmodial activity against the chloroquine-sensitive (D6) and chloroquine-resistant (W2) strains of Plasmodium falciparum, with IC(50) values of 8.5 ± 0.9 and 10.2 ± 1.5 μg/mL, respectively. From this fraction, two new flavonoid glycosides, 7-O-α-d-glucopyranosyl-3,4'-dihydroxy-3'-(4-hydroxy-3-methylbutyl)-5,6-dimethoxyflavone (1) and 7-O-α-d-glucopyranosyl(6'''-p-hydroxcinnamoyl)-3,4'-dihydroxy-3'-(4-hydroxy-3-methylbutyl)-5,6-dimethoxyflavone (2), along with five known flavonoids, 3,7,4'-trihydroxy-3'-(4-hydroxy-3-methylbutyl)-5,6-dimethoxyflavone (3), 3,7-dihydroxy-3'-(4-hydroxy-3-methylbutyl)-5,6,4'-trimethoxyflavone (4), 5,7-dihydroxy-3'-(2-hydroxy-3-methyl-3-butenyl)-3,6,4'-trimethoxyflavone (5), 3,7-dihydroxy-3'-(2-hydroxy-3-methyl-3-buten-yl)-5,6,4'-trimethoxyflavone (6), and 7-O-α-d-glucopyranosyl-3,5-dihydroxy-3'-(4''-acetoxy-3''-methylbutyl)-6,4'-dimethoxyflavone (7), have been isolated as anti-plasmodial principles. Their structures were deduced by spectroscopic analysis including 1D and 2D NMR techniques. The compounds (1-7) showed potent anti-plasmodial activities against D6 and W2 strains of Plasmodium falciparum, with IC(50) values in the range of 5.2-13.5 μM and 5.9-13.1 μM, respectively.
journal_name
J Enzyme Inhib Med Chemjournal_title
Journal of enzyme inhibition and medicinal chemistryauthors
Ijaz F,Ahmad N,Ahmad I,ul Haq A,Wang Fdoi
10.3109/14756360903433365subject
Has Abstractpub_date
2010-12-01 00:00:00pages
773-8issue
6eissn
1475-6366issn
1475-6374journal_volume
25pub_type
杂志文章abstract::Photodynamic molecules represent an alternative approach for cancer therapy for their property (i) to be photo-reactive; (ii) to be not-toxic for target cells in absence of light; (iii) to accumulate specifically into tumour tissues; (iv) to be activable by a light beam only at the tumour site and (v) to exert cytotox...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章,评审
doi:10.1080/14756366.2017.1335310
更新日期:2017-12-01 00:00:00
abstract::The flip regression procedure that we used earlier for handling the xanthones system has been applied to phenylaminoquinazoline analogues. It is known that the substituents at the 6- and 7- positions of the polycyclic system have been identified as the most important structural features. The steric as well as the elec...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360701608726
更新日期:2008-12-01 00:00:00
abstract::The synthesis of new 4-[2-(alkylamino)ethylthio]pyrrolo[1,2-a]quinoxaline derivatives la-1 is described in five or six steps starting from various substituted nitroanilines 2a-e. The bioisostere 5-[2-(alkylamino)ethylthio]pyrrolo[1,2- a]thieno[3,2-e]pyrazine 1m was also prepared. The new derivatives were evaluated as ...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360701485406
更新日期:2007-10-01 00:00:00
abstract::The activation of the β-class carbonic anhydrases (CAs, EC 4.2.1.1) from the bacteria Brucella suis and Francisella tularensis with amine and amino acids was investigated. BsuCA 1 was sensitive to activation with amino acids and amines, whereas FtuCA was not. The most effective BsuCA 1 activators were L-adrenaline and...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756366.2019.1630617
更新日期:2019-12-01 00:00:00
abstract::In this study, 14 different 2-[(1-methyl-1H-tetrazole-5-yl)thio]-1-(phenyl)ethanone derivatives (1-14) were synthesized. The structures of the obtained compounds were elucidated using IR, (1)H-NMR, (13)C-NMR and FAB(+)-MS spectral data and elemental analyses results. The compounds were screened for their anticandidal ...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2012.752363
更新日期:2014-02-01 00:00:00
abstract::Ligand-protein docking is one of the most common techniques used in virtual screening campaigns. Despite the large number of docking software available, there is still the need of improving the efficacy of docking-based virtual screenings. To date, only very few studies evaluated the possibility of combining the resul...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756366.2016.1193736
更新日期:2016-01-01 00:00:00
abstract::Fraxamoside, a macrocyclic secoiridoid glucoside featuring a hydroxytyrosol group, was recently identified as a xanthine oxidase inhibitor (XOI) comparable in potency in vitro to the standard antigout drug allopurinol. However, this activity and its considerably higher value than its derivatives oleuropein, oleoside 1...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756366.2016.1252758
更新日期:2017-12-01 00:00:00
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
更新日期:2013-08-01 00:00:00
abstract::New anticancer agents are highly needed to overcome cancer cell resistance. A novel series of pyrimidine pyrazoline-anthracene derivatives (PPADs) (4a-t) were designed and synthesised. The anti-liver cancer activity of all compounds was screened in vitro against two hepatocellular carcinoma (HCC) cell lines (HepG2 and...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756366.2019.1612889
更新日期:2019-12-01 00:00:00
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::Structural modifications around 8-HETE (8-hydroxyeicosatetraenoic acid), a natural agonist of the PPAR (peroxisome proliferator-activated receptor) nuclear receptors have led previously to the identification of a promising analog, the quinoline S 70655. Series of novel quinoline or benzoquinoline derivatives were desi...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756360903468171
更新日期:2010-10-01 00:00:00
abstract::The antioxidant properties and inhibitory effect on early tumor promoter markers of A. marmelos (25 and 50 mg/Kg b. wt. orally) have been evaluated. Male Wistar rats were pre-treated for seven consecutive days with A. marmelos prior to CCl4 (1 mL Kg(- 1) body weight p. o., in corn oil [1:1 v/v]) treatment. Pre-treatme...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360802167754
更新日期:2009-04-01 00:00:00
abstract:CONTEXT:Endocrinological factors have been recently described to affect respiratory mechanics. OBJECTIVE:To review recent literature data, most of all obtained by the end-inflation occlusion method, describing the effects of molecules of endocrinological interest such as endothelin, erythropoietin and renin-angiotensi...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章,评审
doi:10.3109/14756366.2016.1158174
更新日期:2016-12-01 00:00:00
abstract::A new series of N-heteroarylsubstituted triazolosulfonamide compounds were synthesized and their inhibitory effects on the activity of purified human carbonic anhydrase (hCA) I and II were evaluated. Compounds (3 a-k) were prepared by propargylation of N-heteroaryl compounds. Compound 5 was obtained from sulfanilamide...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2014.940933
更新日期:2015-06-01 00:00:00
abstract::The inhibitory effects of 13-epimeric estrones, D-secooxime and D-secoalcohol estrone compounds on human placental 17β-hydroxysteroid dehydrogenase type 1 isozyme (17β-HSD1) were investigated. The transformation of estrone to 17β-estradiol was studied by an in vitro radiosubstrate incubation method. 13α-Estrone inhibi...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756366.2016.1204610
更新日期:2016-01-01 00:00:00
abstract::From the aerial parts of Thymus sibthorpii Bentham (Lamiaceae), five flavonoids apigenin (1), 7-methoxy-apigenin (2), naringenin (3), eriodictyol (4) and eriodictyol-7-glucoside (5), have been isolated together with caffeic acid methyl ester (6), rosmarinic acid (7) and rosmarinic acid methyl ester (8). The structures...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756366.2016.1222583
更新日期:2016-01-01 00:00:00
abstract::This study investigates the effect of three new platinum complexes: Pt2(2,4-dimethylpyridine)4(berenil)2 (Pt14), Pt2(3,4-dimethylpyridine)4(berenil)2 (Pt15) and Pt2(3,5-dimethylpyridine)4(berenil)2 (Pt16) on growth and viability of breast cancer cells and their putative mechanism(s) of cytotoxicity. Cytotoxicity was m...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756366.2016.1212191
更新日期:2016-01-01 00:00:00
abstract::The inhibition of two human carbonic anhydrase (HCA, EC 4.2.1.1) isozymes, the cytosolic HCA I and II, with heavy metal salts of Pb(II), Co(II) and Hg(II) has been investigated. Human erythrocyte CA-I isozyme was purified with a specific activity of 920 EUmg(-1) and a yield of 30% and CA-II isozyme was purified with a...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360601176048
更新日期:2007-12-01 00:00:00
abstract::A new series of tertiary amine derivatives of chlorochalcone (4a∼4l) were designed, synthesized and evaluated for the effect on acetylcholinesterase (AChE) and buthylcholinesterase (BuChE). The results indicated that all compounds revealed moderate or potent inhibitory activity against AChE, and some possessed high se...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756366.2016.1243534
更新日期:2017-12-01 00:00:00
abstract::Adenosine receptors have been considered as potential targets for drug development, but one of the main obstacles to this goal is to selectively inhibit one receptor subtype over the others. This subject is particularly crucial for adenosine A2b receptor antagonists (AdoRA2B). The structure–activity relationships of x...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2013.830113
更新日期:2014-08-01 00:00:00
abstract::A quantitative structure-activity relationship analysis was conducted on two different series of pyridinylguanidines acting as inhibitors of urokinase-type plasminogen activator using QuaSAR descriptors of molecular modeling software MOE. Multiple linear regression analysis following a stepwise scheme was employed to ...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360701810355
更新日期:2009-02-01 00:00:00
abstract::Poly(ADP-ribose) polymerase (PARP)-1 inhibitor has been suggested to attenuate the ischemia-reperfusion injury. We investigated the protective effect of the cardioplegia with a PARP-1 inhibitor, 4-hydoxyquinazoline (4-HQ), against myocardial ischemia-reperfusion injury. Isolated rat hearts were perfused on a Langendor...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2011.642373
更新日期:2013-02-01 00:00:00
abstract::Complexes of Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) with the Schiff bases salicylidene-o-aminothiophenol (H2L) and thiophene-o-carboxaldeneaniline (SB) have been synthesized and characterized by elemental analyses, magnetic measurements, thermogravimetric analyses as well as infrared spectra and reflectance...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360600628551
更新日期:2006-08-01 00:00:00
abstract::This study reports on a preliminary structure-activity relationship exploration of 4-aryliden-2-methyloxazol-5(4H)-one-based compounds as MAGL/FAAH inhibitors. Our results highlight that this scaffold may serve for the development of selective MAGL inhibitors. A 69-fold selectivity against MAGL over FAAH was achieved ...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2015.1010530
更新日期:2016-01-01 00:00:00
abstract::Several (thiazol-2-yl)hydrazone derivatives from 2-, 3- and 4-acetylpyridine were synthesized and tested against human monoamine oxidase (hMAO) A and B enzymes. Most of them had an inhibitory effect in the low micromolar/high nanomolar range, being derivatives of 4-acetylpyridine selective hMAO-B inhibitors also at lo...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.3109/14756366.2014.987138
更新日期:2015-12-01 00:00:00
abstract::Melatonin (N-acetyl-5-methoxytryptamine) is the chief secretory product of the pineal gland and synthesized enzymatically from serotonin (5-hydroxytryptamine). These indoleamine derivatives play an important role in the prevention of oxidative damage. In the present study, DMPD radical scavenging and cupric ion (Cu(2+...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360701626223
更新日期:2008-12-01 00:00:00
abstract::Seven triterpenoid saponins were identified in methanolic extracts of seeds of the Zolfino bean landrace (Phaseolus vulgaris L.) by HPLC fractionation, revealing their ability to inhibit highly purified human recombinant aldose reductase (hAKR1B1). Six of these compounds were associated by MS analysis with the followi...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756366.2018.1553166
更新日期:2019-12-01 00:00:00
abstract::The whole plants of Carpesium genus are used in traditional medicine as anti-pyretic, analgesic and vermifugic, including a topical application for sores and inflammation. A previous study on Carpesium genus suggested that the antiplasmodial activity against Plasmodium falciparum was due to the existence of 11(13)- de...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360802051610
更新日期:2009-02-01 00:00:00
abstract::Neurodegenerative disorders are consequences of progressive and irreversible loss of neurons due to unwanted apoptosis which involves caspases, a group of cysteine proteases that cleave other proteins and inactivate them. Among several different groups of caspase enzymes, caspases-3 plays a key role in apoptosis and a...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360701652476
更新日期:2008-06-01 00:00:00
abstract::Three series of sintenin derivatives (compounds 1-14) were designed and prepared and their antioxidative and neuroprotective effects were evaluated. The in vitro models of scavenging 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals, chelating ferrous ions, inhibiting the rat brain homogenates lipid peroxidation, and prot...
journal_title:Journal of enzyme inhibition and medicinal chemistry
pub_type: 杂志文章
doi:10.1080/14756360802188214
更新日期:2009-04-01 00:00:00