Umanjeno preživljavanje neoplastičkih humanih HeLa ćelija supstituisanim (E)-b-(benzoil) akrilnim kiselinama

The bacteriostatic activity of some of alkyl substituted (E)-β-(benzoyl)acrylic acids was shown earlier. The aim of this study was to investigate the antiproliferative action of 19 alkyl-, or halogeno-, or methoxy-, or acetamido-substituted (E)-β-(benzoyl)acrylic acids, against human cervix carcinoma, HeLa, cells. Target HeLa cells were continuously treated with increasing concentrations of substituted (E)-β-(benzoyl)acrylic acids during two days. The MTT test was used for assessment of the antiproliferative action of this group of compounds. Treatment of HeLa cells with 4-methyl-, 4-fluoro-, 4-chloro-, 4-bromo-and 4-methoxy-derivatives of (E)-β-(benzoyl) acrylic acid leads to the expression of cytostatic activity against HeLa cells (IC50 were in the range from 31-40 μM). Their antiproliferative action was less than that of the basic compound (E)-β-(benzoyl)acrylic acid whose IC50 was 28.5 μM. The 3,4-dimethyl-, 2,4-dimethyl-and 2,5-dimethyl-derivatives as well as the 4-ethyl-and 3,4-dichloro-and 2,4-dichloro-derivatives, have stronger cytostatic activity than the correspoding monosubstituted and parent compound. Their IC50 were 18.5 μM; 17.5 μM; 17.0 μM; 17.5 μM; 22.0 μM and 18 μM, respectively. The 4-iso-propyl-and 4-n-butyl-derivatives excited higher cytostatic activity than the compounds with a lower number of methylene -CH2-groups in the substitutent. Their IC50 were 14.5 μM and 6.5 μM respectively. The 2,5-di-iso-propyl-and 4-tert-butyl-derivatives expressed the most strong antiproliferative action against the investigated HeLa cells, IC50 being 4.5 μM and 5.5 μM, respectively. The investigated compounds affected the survival of HeLa cells, expressing a strong structure-activity relationship of the Hansch type.Još ranije je pokazana bakteriostatska aktivnost nekih alkil supstituisanih (E)-b-(benzoil)akrilnih kiselina. Cilj ovog rada je bio proučavanje antiproliferativnog dejstva 19 (E)-b-(benzoil)akrilnih kiselina, alkil-, ili halogeno-, ili metoksi-, ili acetamido-supstituisnaih, na ćelije humnog karcinoma grlića materice, HeLa ćelije. Ciljne HeLa ćelije, su kontinualno tretirane rastućim koncentracijama supstituisanih (E)-b-(benzoil)akrilnih kiselina tokom dva dana. MTT test je korišćen za utvrđanje antiproliferativnog dejstva ovog jedinjenja. Tretiranje HeLa ćelija 4-metil-, 4-fluoro, 4-hloro-, 4-bromo- i 4-metoksi-derivatima (E)-b-(benzoil)akrilne kiseline dovelo je do ispoljavanja citostatske aktivnosti prema HeLa ćelijama (IC50 su između 31.40 mM). Njihovo antiproliferativno dejstvo je bilo manje nego kod osnovnog jedinjenja, (E)-b-(benzoil)akrilne kiseline, čije IC50 je bilo 28,5 mM. 3,4-Dimetil-, 2,4-dimetil- i 2,5-dimetil- supstituisani, kao i 4-etil- te 3,4-dihloro-i 2,4- dihloro- derivati, imaju jaču citostatsku aktivnost od odgovarajućeg monosupstituisanog i osnovnog jedinjenja.Njihove IC50 vrednosti su 18,5 mM; 17,5 mM, 17,0 mM; 17,5 mM; 22,0 mMi18mM, u navedenom redosledu. 4-iso-Propil- i 4-n-butil-derivati pokazuju višu citostatsku aktivnost od jedinjenja sa manjim brojem metilenskih –CH2. grupa u supstituentu. Wihove IC50 vrednosti su 14,5 mM odnosno 6,5 mM. 2,5-Di-iso-propil- i 4-tert-butil- derivati ispoqavaju najjače antiproliferativno dejstvo prema ispitivanim HeLa ćelijama, IC50 su 4,5 mM i 5,5 mM u navedenom redosledu. Proučavana jedinjenja utiču na pre.ivqavawe HeLa ćelija, ispoljavajunji izrazitu relaciju Hanschovog tipa između strukture i biološke aktivnosti

Antiproliferative activity of β-hydroxy- β-arylalkanoic acids

Article describes the synthesis of fifteen β-hydroxy- β-arylalkanoic acids by Reformatsky reaction using the 1-ethoxyethyl-2- bromoalkanoates, aromatic or cycloalkyl ketones or aromatic aldehydes. The short survey of previously reported synthetic procedures for title compounds, is given. The majority of obtained compounds exert antiproliferative activity in vitro toward human: HeLa, Fem-X cells, K562, and LS174 cells, having IC 50 values from 62.20 to 205 μM. The most active compound is 3-OH-2,2-di-Me-3-(4-biphenylyl)-butanoic acid, having the IC 50 value 62.20 μM toward HeLa cells. Seven examined compounds did not affect proliferation of healthy human blood peripheral mononuclear cells (PBMC and PBMC+ PHA), IC 50 > 300 μM. The preliminary QSAR results show that estimated lipophilicity of compounds influences their antiproliferative activity in the first place. The ability of dehydration, and the spatial arrangement of hydrophobic portion, HBD and HBA in molecules are has almost equal importance as lipophilicity

The hard X-ray Photon Single-Shot Spectrometer of SwissFEL - Initial characterization

SwissFEL requires the monitoring of the photon spectral distribution at a repetition rate of 100 Hz for machine optimization and experiment online diagnostics. The Photon Single Shot Spectrometer has been designed for the photon energy range of 4 keV to 12 keV provided by the Aramis beamline. It is capable of measuring the spectrum in a non-destructive manner, with an energy resolution of Δ E/E = (2-5) × 10-5 over a bandwidth of 0.5% on a shot-to-shot basis. This article gives a detailed description about the technical challenges, structures, and considerations when building such a device, and to further enhance the performance of the spectrometer

An alignment independent 3D QSAR study of the antiproliferative activity of 1,2,4,5-tetraoxanes

An alignment-free 3D QSAR study on antiproliferative activity of the thirty-three 1,2,4,5-tetraoxane derivatives toward two human dedifferentiated cell lines was reported. GRIND methodology, where descriptors are derived from GRID molecular interaction fields (MIF), were used It was found that pharmacophoric pattern attributed to the most potent derivatives Include amido NH of the primary or secondary amide, and the acetoxy fragments at positions 7 and 12 of steroid core which are, along with the tetraoxane ring, common for all studied compounds. Independently, simple multiple regression model obtained by using the whole-molecular properties, confirmed that the hydrophobicity and the H-bond donor properties are the main parameters influencing potency of compounds toward human cervix carcinoma (HeLa) and human malignant melanoma (FemX) cell lines Corollary, similar structural motifs are found to be Important for the potency toward both examined cell lines. (C) 2010 Elsevier Masson SAS. All rights reserved

One-Step Conversion of Ketones to Conjugated Acids Using Bromoform

Phase-transfer-catalyzed (PTC) reactions of ketones with bromoform and aqueous lithium hydroxide in alcoholic solvent result in the formation of alpha,beta-unsaturated carboxylic acids. The reaction was performed at room temperature for 24h. The corresponding conjugated acids were obtained from cyclic or aromatic ketones, whereas bromo acids were obtained from 4-oxo-piperidine-1-carboxylic acid ethyl ester (13) and 4-oxo-piperidine-1-carboxylic acid tert-butyl ester (14)

Photo-double-ionization mechanisms in aromatic hydrocarbons

We have measured the ratios of doubly to singly charged molecular parent ions of benzene (partially deuterated), naphthalene, anthracene, pentacene, pyrrole, furan, selenophene, and coronene for photon energies ranging from threshold to the carbon K shell. The photon-energy dependence of the ratio curves has been analyzed and compared to each other for the above molecules. We conclude that two - and in some cases three - different photo-double-ionization mechanisms exist for aromatic hydrocarbons. One of the mechanisms is the formation of a two-electron pseudoparticle. This finding may be useful in the quest for understanding high-temperature superconductivity. © 2013 American Physical Society