Mononuclear iron(iii) complexes of tridentate ligands with efficient nuclease activity and studies of their cytotoxicity

2015 ◽  
Vol 13 (47) ◽  
pp. 11445-11458 ◽  
Author(s):  
Nidhi Tyagi ◽  
Ajanta Chakraborty ◽  
Udai P. Singh ◽  
Partha Roy ◽  
Kaushik Ghosh
Keyword(s):  
Cell Lines ◽  
Dna Cleavage ◽  
Mcf7 Cell ◽  
Nuclease Activity ◽  
Oh Radicals ◽  
Dna Interactions ◽  
Tridentate Ligands ◽  
Mononuclear Iron ◽  
Chelated Iron

Mono- and bis-chelated iron(iii) complexes derived from phenolato-based tridentate ligands have been synthesised and characterized. These complexes show electrostatic DNA interactions and efficient DNA cleavage via OH˙ radicals, and induce cytotoxicity in MCF7 cell lines.

scholarly journals Synthesis, Structural Characterization, and Biological Activity Studies of Ni(II) and Zn(II) Complexes

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Palakuri Kavitha ◽  
K. Laxma Reddy
Keyword(s):  
Metal Complexes ◽  
Dna Cleavage ◽  
Spectroscopic Data ◽  
Nuclease Activity ◽  
Molar Conductance ◽  
Agarose Gel Electrophoresis ◽  
Tridentate Ligands ◽  
Cleavage Activity ◽  
Dna Cleavage Activity ◽  
Bacteria And Fungi

Ni(II) and Zn(II) complexes were synthesized from tridentate 3-formyl chromone Schiff bases such as 3-((2-hydroxyphenylimino)methyl)-4H-chromen-4-one (HL1), 2-((4-oxo-4H-chromen-3-yl)methylneamino)benzoic acid (HL2), 3-((3-hydroxypyridin-2-ylimino)methyl)-4H-chromen-4-one (HL3), and 3-((2-mercaptophenylimino)methyl)-4H-chromen-4-one (HL4). All the complexes were characterized in the light of elemental analysis, molar conductance, FTIR, UV-VIS, magnetic, thermal, powder XRD, and SEM studies. The conductance and spectroscopic data suggested that, the ligands act as neutral and monobasic tridentate ligands and form octahedral complexes with general formula [M(L1–4)2]·nH2O (M = Ni(II) and Zn(II)). Metal complexes exhibited pronounced activity against tested bacteria and fungi strains compared to the ligands. In addition metal complexes displayed good antioxidant and moderate nematicidal activities. The cytotoxicity of ligands and their metal complexes have been evaluated by MTT assay. The DNA cleavage activity of the metal complexes was performed using agarose gel electrophoresis in the presence and absence of oxidant H2O2. All metal complexes showed significant nuclease activity in the presence of H2O2.

scholarly journals Phytochemical Analysis of Anvillea garcinii Leaves: Identification of Garcinamines F–H and Their Antiproliferative Activities

Plants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1130
Author(s):  
Hanan Y. Aati ◽  
Shagufta Perveen ◽  
Raha Orfali ◽  
Areej M. Al-Taweel ◽  
Jiangnan Peng ◽  
...  
Keyword(s):  
Cell Lines ◽  
Liver Diseases ◽  
Mcf7 Cell ◽  
Sesquiterpene Lactones ◽  
2D Nmr ◽  
Phytochemical Analysis ◽  
Antidiabetic Agent ◽  
Arab Region ◽  
New Compounds ◽  
Acid Unit

Anvillea garcinii is a medicinal plant used in the Arab region for intestinal diseases, lung and liver diseases, digestive problems, and as an antidiabetic agent. Repeated chromatographic purifications of A. garcinii leaves led to the isolation of three undescribed guaiane sesquiterpene derivatives, named garcinamines F–H, characterized by the presence of an amino acid unit, along with five known sesquiterpene lactones (garcinamines B–E and 9β-hydroxyparthenolide). The structures of the new compounds were established using spectroscopic (1D and 2D NMR) and spectrometric methods (ESIMS). Garcinamine H possesses a double bond at the Δ1,10 position, a structural feature rarely reported in guaianolide-type sesquiterpenes. The antiproliferative activity of the isolated sesquiterpenes was screened against three different cancer cell lines, and 9β-hydroxyparthenolide and garcinamines C and D displayed significant effects against lung carcinoma (A549), colon carcinoma (LoVo), and breast carcinoma (MCF7) cell lines.

scholarly journals A YoeB toxin cleaves both RNA and DNA

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Julia McGillick ◽  
Jessica R. Ames ◽  
Tamiko Murphy ◽  
Christina R. Bourne
Keyword(s):  
Dna Cleavage ◽  
Divalent Cations ◽  
Nuclease Activity ◽  
Dose Dependence ◽  
Cleavage Activity ◽  
Double Stranded Dna ◽  
Dna Cleavage Activity ◽  
Evolutionarily Conserved ◽  
Toxin Protein ◽  
Rna And Dna

AbstractType II toxin-antitoxin systems contain a toxin protein, which mediates diverse interactions within the bacterial cell when it is not bound by its cognate antitoxin protein. These toxins provide a rich source of evolutionarily-conserved tertiary folds that mediate diverse catalytic reactions. These properties make toxins of interest in biotechnology applications, and studies of the catalytic mechanisms continue to provide surprises. In the current work, our studies on a YoeB family toxin from Agrobacterium tumefaciens have revealed a conserved ribosome-independent non-specific nuclease activity. We have quantified the RNA and DNA cleavage activity, revealing they have essentially equivalent dose-dependence while differing in requirements for divalent cations and pH sensitivity. The DNA cleavage activity is as a nickase for any topology of double-stranded DNA, as well as cleaving single-stranded DNA. AtYoeB is able to bind to double-stranded DNA with mid-micromolar affinity. Comparison of the ribosome-dependent and -independent reactions demonstrates an approximate tenfold efficiency imparted by the ribosome. This demonstrates YoeB toxins can act as non-specific nucleases, cleaving both RNA and DNA, in the absence of being bound within the ribosome.

Synthesis, crystal structure and DNA cleavage activities of copper(II) complexes with asymmetric tridentate ligands

2004 ◽  
Vol 98 (3) ◽  
pp. 423-429 ◽  
Author(s):  
Xiang-Li Wang ◽  
Hui Chao ◽  
Hong Li ◽  
Xian-Lan Hong ◽  
Liang-Nian Ji ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Dna Cleavage ◽  
Tridentate Ligands

Eryngium billardieri Extract and Fractions Induces Apoptosis in Cancerous Cells

2021 ◽  
Vol 21 ◽  
Author(s):  
Samira Hasanbeiglu ◽  
Kamran Hosseini ◽  
Ommoleila Molavi ◽  
Parina Asgharian ◽  
Vahideh Tarhriz
Keyword(s):  
Cell Lines ◽  
Mcf7 Cell ◽  
Inhibitory Effect ◽  
P Value ◽  
Breast Cancers ◽  
Natural Habitats ◽  
Cytotoxic Effects ◽  
Soxhlet Apparatus ◽  
Mcf7 Cell Line ◽  
Cancerous Cells

Background: Eryngium is genus flowering plants in the Umbelliferae family having pharmacological properties such as anti-inflammatory and anti-diabetic. Given the nature of melanoma and breast cancers in recent years and the fact that the anti-cancer properties of Eryngium billardieri on mentioned cell lines have not been studied, the present study conducted to explore these properties. Objective: The mechanisms of cytotoxicity and apoptosis of aerial parts of various extracts and fractions of E. billardieri on cancerous cells and normal cells were investigated. Methods: Samples were collected from natural habitats, dried and then extracted by Soxhlet apparatus with solvents of n-Hex, DCM and methanol, respectively. The cytotoxic effects of the extracts were investigated by MTT method on MCF7, B16 and HFF-2 classes for 24 and 48 hours. Flowcytometry, was also used to investigate the mechanism of cytotoxicity and confirming by Real-time PCR of p53 and Bax genes, which codes apoptosis regulator proteins. Meanwhile, volatile compounds of extracts were identified by GC-MS method. Results: The obtained data showed that the n-Hex extract of E. billardieri on B-16 and MCF7 cell lines and dichromethane extract on MCF7 cell line had the most significant cytotoxic effect compared to DMSO control (p value <0.001). Our finding showed that the mechanism of n-Hex extract with 80% and 100% vlc fractions on B16 induced apoptotic compared to HFF-2 control cells, moreover, n-Hex extract and 80% vlc fraction on MCF7 was apoptotic. The major compounds of n-Hex, DCM and 80% and 100% fractions of n-Hex extract obtained from GC-MS are non-terpenoid. Conclusion: Non-terpenoids compounds of E. billardieri can be the responsible for showing the most cytotoxic effects on MCF7 and B16 cell lines with apoptotic mechanism and n-Hex extract had the most significant inhibitory effect on cancerous cells compared to the HFF-2 control cells by the mechanism of apoptosis.

scholarly journals A New Triterpene Glucoside from Genista numidica

2018 ◽  
Vol 13 (9) ◽  
pp. 1934578X1801300
Author(s):  
Feryal Benayache ◽  
Massimiliano D'Ambola ◽  
Roberta Cotugno ◽  
Massika Chaouche ◽  
Samir Benayache ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Cell Lines ◽  
Oleanolic Acid ◽  
Hela Cells ◽  
Antiproliferative Activity ◽  
Mcf7 Cell ◽  
2D Nmr ◽  
Aerial Parts ◽  
Ethyl Acetate Extracts

A new oleanolic acid triterpene glucoside, 3- O-β-D-glucopyranosyl-3β,21β,28-trihydroxy-olean-12-en-27-oic acid (1), has been isolated together with twelve known compounds from the chloroform and ethyl acetate extracts of Genista numidica Spach (Fabaceae) aerial parts. The structures were elucidated by spectroscopic and spectrometric analyses, mainly 1D-, 2D-NMR and MS data, and comparison with the literature. The antiproliferative activity of isolates was investigated on Jurkat, HeLa, and MCF7 cell lines. The most active triterpene, 3- O-β-D-glucopyranosyl-olean-12-en-3β,27,28,29-tetraol, showed activity in all cell lines. Further studies revealed that this compound induced in HeLa cells a cytostatic response.

Synthesis and characterization of ZnO nanoflakes anchored carbon nanoplates for antioxidant and anticancer activity in MCF7 cell lines

2019 ◽  
Vol 102 ◽  
pp. 536-540 ◽  
Author(s):  
Mariadhas Valan Arasu ◽  
A. Madankumar ◽  
J. Theerthagiri ◽  
Sunitha Salla ◽  
S. Prabu ◽  
...  
Keyword(s):  
Anticancer Activity ◽  
Cell Lines ◽  
Mcf7 Cell ◽  
Synthesis And Characterization ◽  
Zno Nanoflakes

scholarly journals Styryllactones and Acetogenins from the Fruits of Goniothalamus macrocalyx

2014 ◽  
Vol 9 (4) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Quy Hung Trieu ◽  
Huong Doan Thi Mai ◽  
Van Cuong Pham ◽  
Marc Litaudon ◽  
Françoise Gueritte ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Cell Lines ◽  
Mass Spectrometer ◽  
Natural Resource ◽  
Absolute Configuration ◽  
Mcf7 Cell ◽  
Crystallographic Analysis ◽  
Kb Cells ◽  
X Ray ◽  
Orbitrap Mass Spectrometer

Two new styryllactones, macrocalactone (1) and 3-deoxycardiobutanolide (2), were isolated from the fruits of Goniothalamus macrocalyx Ban (Annonaceae), together with seven known compounds including four acetogenins, annonacin (3), solamin (4), isoannonacin (5), trans-murisolinone (6), and three other compounds, 7-acetylaltholactone (7), β-caryophyllene-8R,9R-oxide (8) and 2-(2′-hydroxytetracosanoylamino)-octadecane-l,3,4-triol (9). Their structures were determined by spectroscopic and MS analysis. The absolute configuration of I was determined by X-ray crystallographic analysis. The structures of the acetogenins were confirmed by liquid chromatography coupled to a hybrid quadrupole-time of flight mass spectrometer, using post-column lithium infusion. The results were compared with the fragmentation obtained with a hybrid linear trap-orbitrap mass spectrometer. Compound 7 had cytotoxicity against KB, HepG2, Lu, and MCF7 cell lines with IC50 values of 13.1, 23.7, 26.3 and 60.2 μM, respectively, whereas annonacin (3) was selectively active against KB cells (IC50 value of 6.5 μM). The discovery of 3-deoxycardiobutanolide (2) from the fruits of this plant revealed that G. macrocalyx could be a valuable natural resource to obtain this compound as it has been previously reported to have a significant cytotoxicity against different cancer cell lines, especially HL-60 cells.

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