Abstract:
:A linear and non-linear quantitative structure-activity relationship (QSAR) study is presented for modeling and predicting heparanase inhibitors' activity. A data set that consisted of 92 derivatives of 2,3-dihydro-1,3-dioxo-1H-isoindole-5-carboxylic acid, furanyl-1,3-thiazol-2-yl and benzoxazol-5-yl acetic acids is used in this study. Among a large number of descriptors, four parameters classified as physico-chemical, topological and electronic indices are chosen using stepwise multiple regression technique. The artificial neural networks (ANNs) model shows superiority over the multiple linear regressions (MLR) by accounting 87.9% of the variances of antiviral potency of the heparanase inhibitors. This paper focuses on investigating the role of weight update functions in developing ANNs. Levenberg-Marquardt (L-M) algorithm shows a better performance compared with basic back propagation (BBP) and conjugate gradient (CG) algorithms. The accuracy of 4-3-1 L-M ANN model was illustrated using leave-one-out (LOO), leave-multiple-out (LMO) cross-validations and Y-randomization. The mean effect of descriptors and sensitivity analysis show that log P is the most important parameter affecting the inhibitory behavior of the molecules.
journal_name
Eur J Med Chemjournal_title
European journal of medicinal chemistryauthors
Jalali-Heravi M,Asadollahi-Baboli M,Shahbazikhah Pdoi
10.1016/j.ejmech.2007.04.014subject
Has Abstractpub_date
2008-03-01 00:00:00pages
548-56issue
3eissn
0223-5234issn
1768-3254pii
S0223-5234(07)00200-0journal_volume
43pub_type
杂志文章abstract::To identity fast-acting, multistage antimalarial agents, a series of pyridylvinylquinoline-triazole analogues have been synthesized via CuAAC. Most of the compounds display significant inhibitory effect on the drug-resistant malarial Dd2 strain at low submicromolar concentrations. Among the tested analogues, compound ...
journal_title:European journal of medicinal chemistry
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journal_title:European journal of medicinal chemistry
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abstract::Structure-based drug design was utilized to develop novel, 1-hydroxy-2-naphthoate-based small-molecule inhibitors of Mcl-1. Ligand design was driven by exploiting a salt bridge with R263 and interactions with the p2 pocket of the protein. Significantly, target molecules were accessed in just two synthetic steps, sugge...
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journal_title:European journal of medicinal chemistry
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abstract::A series of novel N(6)-alkyl(aryl)-2-alkyl(aryl)thioadenosines were synthesized, and their human antiplatelet aggregation activities were evaluated by the stimulation of adenosine 5'-diphosphate (ADP). Some of these compounds showed strong activity, among which compound 5b(11) displayed the highest activity with an IC...
journal_title:European journal of medicinal chemistry
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abstract::We report a convenient synthesis of carbazole-1,4-quinone alkaloid koeniginequinones A and B using a tandem ring-closing metathesis with the dehydrogenation reaction sequence under an O2 atmosphere as an important step. Using this method, carbazole-1,4-quinones substituted at the 5-, 6-, 7-, and/or 8-positions have be...
journal_title:European journal of medicinal chemistry
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doi:10.1016/j.ejmech.2016.05.065
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abstract::Fungi, which can cause serious infections, results in more than 1.35 million deaths annually throughout the world. Azole antifungal drugs which could inhibit the enzyme lanosterol 14α-demethylase, occupy an important position in the treatment of fungal infections. Tetrazoles, practically non-metabolized bioisosteric a...
journal_title:European journal of medicinal chemistry
pub_type: 杂志文章,评审
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abstract::QSAR analysis for modeling the antileishmanial activity screening of a series of 49 nitro derivatives of Hydrazides were carried out using different Chemometrics methods. First, a large number of descriptors were calculated using Hyperchem, Mopac and Dragon softwares. Then, a suitable number of these descriptors were ...
journal_title:European journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1016/j.ejmech.2009.11.019
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abstract::Matrix metalloproteinases (MMPs) are important factors in gliomas since these enzymes facilitate invasion into the surrounding brain and participate in neovascularization. In particular, the gelatinases (MMP-2 and MMP-9), and more recently MMP-25, have been shown to be highly expressed in gliomas and have been associa...
journal_title:European journal of medicinal chemistry
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doi:10.1016/j.ejmech.2011.03.033
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abstract::Various classes of natural products and synthetic compounds were tested against reference strains and clinical multidrug resistant isolates of Mycobacterium tuberculosis. Vermelhotin (19), a natural tetramic acid from fungi, was the most active toward clinical MDR TB isolates (MIC 1.5-12.5 μg/mL). Synthetic compounds ...
journal_title:European journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1016/j.ejmech.2014.10.026
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abstract::SH2 domain-containing inositol 5'-phosphatase 2 (SHIP2) is a lipid phosphatase that produce phosphatidylinositol 3,4-bisphosphate (PI(3,4)P2) from phosphatidylinositol 3,4,5-triphosphate (PI(3,4,5)P3), and is involved in many diseases such as neurodegenerative diseases. A recent report demonstrating that SHIP2 inhibit...
journal_title:European journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1016/j.ejmech.2018.07.071
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abstract::The flavonoids, baicalin (5,6-dihydroxy-2-phenyl-4H-1-benzopyran-4-one-7-O-d-β-glucuronic acid) 1 and its aglycone, baicalein 2 are found in edible medicinal plants, Scutellaria baicalensis Georgi and Oroxylum indicum (L.) Kurz in abundant quantities. The antioxidant and anti-inflammatory effects of these flavonoids h...
journal_title:European journal of medicinal chemistry
pub_type: 杂志文章,评审
doi:10.1016/j.ejmech.2017.03.004
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abstract::In this study, a series of novel C-28 esters and amides derivatives of hederagenin (He) were designed and synthesized in attempt to develop potent antitumor agents. Their structures were confirmed by MS, IR, (1)H NMR and (13)C NMR spectroscopic analyses and their cytotoxic activities were screened in SRB assays using ...
journal_title:European journal of medicinal chemistry
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doi:10.1016/j.ejmech.2015.10.006
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abstract::Because of the increasing number of immunocompromised patients and due to problems with antifungal treatment, especially with the most widely used antifungals, azoles, there is an urgent need for new, potent and safe antifungals with fewer cytochrome P450 (CYP)-mediated interactions with other drugs. In the present st...
journal_title:European journal of medicinal chemistry
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doi:10.1016/j.ejmech.2011.10.053
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abstract::The amine position of the K+ channel blocker 4-aminopyridine was functionalized to form amide, carbamate and urea derivatives in an attempt to identify novel compounds which restore conduction in injured spinal cord. Eight derivatives were tested in vitro, using a double sucrose gap chamber, for the ability to restore...
journal_title:European journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1016/j.ejmech.2005.04.017
更新日期:2005-09-01 00:00:00
abstract::Steriodal heterocyclic systems namely cholest-5-en-3-oxazolo and thiazoloquinoxaline have been synthesized via the reaction of cholest-5-en-3-one semicarbazone/thiosemicarbazone with 2,3-dichloroquinoxaline at 80 degrees C in high yield. Cholest-5-en-3-one semicarbazone is obtained by the condensation of cholest-5-en-...
journal_title:European journal of medicinal chemistry
pub_type: 杂志文章
doi:10.1016/j.ejmech.2007.12.008
更新日期:2008-09-01 00:00:00
abstract::A series of linezolid analogues containing a hydrazone moiety were designed, synthesized and evaluated for their antibacterial activity. Most compounds exhibited more potent antibacterial activity against S.aureus, MRSA, MSSA, LREF and VRE pathogens as compared with linezolid and radezolid. Compounds 9a, 9c, 9f, 9g, 1...
journal_title:European journal of medicinal chemistry
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doi:10.1016/j.ejmech.2018.09.004
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journal_title:European journal of medicinal chemistry
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journal_title:European journal of medicinal chemistry
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abstract::Novel diarylpyrimidines (DAPY), which represent next generation of non-nucleoside reverse transcriptase inhibitors (NNRTIs), were synthesized and their activities against human immunodeficiency virus type I (HIV-1) assessed. Modulations at positions 2 and 6 of the left phenyl ring generated interesting derivatives of ...
journal_title:European journal of medicinal chemistry
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journal_title:European journal of medicinal chemistry
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abstract::New series of benzothiazole and pyrimido[2,1-b]benzothiazole derivatives were synthesized and characterized by analytical and spectrometrical methods (IR, HRMS, (1)H and (13)C NMR). Nineteen of the synthesized compounds were selected by the National Cancer Institute (NCI), USA, to be screened for their antitumor activ...
journal_title:European journal of medicinal chemistry
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abstract::CYP1B1 is implicated to have a role in the development of breast, ovarian, renal, skin and lung carcinomas. It has been suggested that identification of potent and specific CYP1B1 inhibitors can lead to a novel treatment of cancer. Flavonoids have a compact rigid skeleton which fit precisely within the binding cavity ...
journal_title:European journal of medicinal chemistry
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doi:10.1016/j.ejmech.2017.02.032
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abstract::Tumor immunotherapy has made great progress in recent years. In the tumor microenvironment, the binding of PD-1 and its ligand PD-L1 can promote tumor immune escape and tumor survival. Clinical studies have indicated that antibodies blocking PD-1 and PD-L1 have reliable effects on many advanced malignant tumors. Howev...
journal_title:European journal of medicinal chemistry
pub_type: 杂志文章,评审
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abstract::Preparation, characterization and drug release behavior of loaded polybutyl adipate (PBA) nanocapsules with penicillin-G are described here. The nanocapsules were produced using a double emulsion solvent evaporation technique, using dichloromethane as an organic solvent and Tween and Span as surfactants. In this proce...
journal_title:European journal of medicinal chemistry
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doi:10.1016/j.ejmech.2008.09.045
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abstract::Three new Amaryllidaceae alkaloids, named zephycandidines I-III (1-3), were isolated from Zephyranthes candida. The structures of 1-3 were elucidated by spectroscopic analyses including HRESIMS, 1H NMR, 13C NMR, DEPT, HSQC, 1H-1H COSY, HMBC, ROESY, and electronic circular dichroism (ECD), as well as ECD calculation. T...
journal_title:European journal of medicinal chemistry
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abstract::Protein-protein interactions are attractive targets because they control numerous cellular processes. In oncology, apoptosis regulating Bcl-2 family proteins are of particular interest. Apoptotic cell death is controlled via PPIs between the anti-apoptotic proteins hydrophobic groove and the pro-apoptotic proteins BH3...
journal_title:European journal of medicinal chemistry
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abstract::A set of CB2R ligands, based on the thiophene scaffold, was synthesized and evaluated in in vitro assays. Compounds 8c-i, k, l, bearing the 3-carboxylate and 2-(adamantan-1-yl)carboxamido groups together with apolar alkyl/aryl substituents at 5-position or at 4- and 5-positions of the thiophene ring possess high CB2R ...
journal_title:European journal of medicinal chemistry
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doi:10.1016/j.ejmech.2018.09.070
更新日期:2019-01-01 00:00:00